Installation of a wet-type flue gas desulfurization

 

(57) Abstract:

The invention can be used in the field of gas purification from harmful components. The inventive housing tower absorber, comprising an inlet channel and outlet channel, made in one piece with the circulation tank, the upper portion of which is attached tower. Tower absorber has a self-supporting structure and is only available at the circulation tank. At least the high flow spray level in the area of the spray in the intake channel includes a spray pipe, equipped with spray nozzles for spraying the absorbing liquid in the direction parallel to the gas stream, and at least the lowest flow of the spraying step includes spray nozzles for spraying the absorbing liquid in the opposite direction to the gas flow. Tower absorber is a made in one piece construction in which the upper portion of the circulation tank forms part of the channel of the tower, so the tower absorber is self-supporting, and, moreover, plain that increases its mechanical strength and ustrina">

The invention relates to the installation of a wet-type flue gas desulfurization, and more particularly to the installation of a wet-type desulfurization of flue gas, having a construction in which the flow path of exhaust gas is determined in a direction which is not vertical (which below will be called horizontal installation for desulphurization).

Known in the art the so-called limestone-gypsum system wet type flue gas desulfurization designed to absorb sulfur oxides (which below will be called as SOxor SO2) in the exhaust when used as absorber compounds of calcium, such as limestone or lime for the conversion of calcium sulfite, which is a reaction product, resistant gypsum to retrieve the last as a by-product. The desulfurization reaction in the process of recovery of gypsum limestone represented by the following chemical formula:

CaCO3+ SO2+ 2H2O + 1/2O2--- CaSO42H2O + CO2< / BR>
Fig. 63 the accompanying drawings of the present description illustrates a known plant for desulfurization of dipeptides. Exhaust gas 101 is passed into the tower absorber 102 and is in contact with the circulating slurry in the zone 103 spray for cooling, turning to dust and desulfurization. After this, the resulting gas is subjected to removal of fog in demister 104 and then is discharged from the tower 102 absorber.

On the other hand, the limestone slurry 117, which represents the absorbing liquid is supplied to the circulation tank 105 by a pump 110 for limestone sludge, and supply area 103 of the spray tower absorber 102 through a set of spray nozzles, placed in it, when using the circulation pump 108, and sprayed it, to come into contact with exhaust gas 101, causing the sulfur oxides in the exhaust 101 are removed by passing the absorption process. The circulation tank 105 equipped with a mixer 106, mounted on the side wall of the circulation tank 105, and the pipe 107, the feed of oxidizing air and installed in the zone of the blades of the mixer 106. The tank 111, the pump 110 and a feeding tube is designed to supply a new absorbing fluid with calcium in the circulation tank 105. After that, the obtained results in as he was subjected to absorption of SO2served in the hub 112 by suction pump 109, where it is condensed, and then the thick sludge is collected in the tank 113 for gypsum slurry and finally dehydrated by the centrifugal separator 115, whereby gypsum is extracted in the form of a powder. Pop-up liquid 118, extracted in the hub 112 and the centrifugal separator 115, is recycled and reused for controlling the flow of wash water and the limestone sludge in the system.

However, the technology of the prior art has the disadvantage that exposed to splashing liquid sludge 117 is brought into contact with exhaust gas flowing in the vertical direction in the tower 102 absorber or in the zone 103 splashing, and therefore, to ensure sufficient time for such contact is necessary to increase the height of the tower 102 absorber, which results in increase of the size and complexity of the design of the equipment, in particular, to increase the length above and below along the flow of the air channels. Another disadvantage is that you want to increase the performance of the circulation pump 108 by increasing the height of the tower 102 absorber is mportant, increases the heterogeneity of the gas flow inside the tower 102 absorber, resulting in a decrease in the efficiency of desulfurization.

It was therefore proposed a system in which the reservoir (well) with circulating absorber is connected with a horizontal tower absorber, which is designed to spray in a horizontal direction of the absorbing liquid. This system, however, is not widely used because it does not provide a simple free fall fog, and as the liquid level in the bottom of the tower absorber was changed because of a change in the amount of sprayed liquid and the amount of exhaust gas to influence the gas flow. In addition, this known system is a system of the type in which the tower absorber and the circulation tank separated from each other, hence the need to increase the height of the tower. Therefore, the aim of the present invention to provide an installation of a wet-type flue gas desulfurization, in which a small height of the tower, and which can be simplified structural components of the equipment.

Another objective of the present invention to provide an installation wet podvodkoj energy.

Another objective of the present invention to provide an installation for desulfurization, which is economical and capable of providing high efficiency desulfurization.

Another, another objective of the present invention to provide an installation of a wet-type flue gas desulfurization, which is reliable, having a compact tower absorber and in which at the same time can be reduced by the amount of scattered mists.

Another objective of the present invention to provide an installation of a wet-type flue gas desulfurization, which eliminates the heterogeneity of the flow of exhaust gas and which is rigidly fixed to the spray pipe.

In addition, another objective of the present invention to provide an installation of a wet-type flue gas desulfurization, the effectiveness of which is increased by controlling the quality of the absorbing liquid sprayed for contact with exhaust gas, and which reduced the quality of the resulting gypsum increased the efficiency of desulfurization.

Another, another objective of the present invention is to reduce the pressure loss in the tower absorber posredstvennye high efficiency desulfurization by reducing production and technological expenses.

To achieve the above objectives, according to the first aspect and feature of the present invention is proposed to install a wet-type flue gas desulfurization, which includes the tower absorber having a gas flow path defined therein in a direction other than vertical, the inlet channel, providing exhaust gas containing sulfur oxides and the absorbing liquid sprayed from the spray to come in contact with each other, and an exhaust channel having demister to remove scattered mists; the circulation tank to the collection of the absorbing liquid discharged from the tower absorber, and oxidation of the sulfur oxide absorbing fluid through the air circulation system collected absorbing fluid into the zone of the spray tower absorber; and tower absorber comprising inlet and outlet channels, made in one piece on the circulation tank and has a self-supporting structure that is installed only on the circulation tank. As an alternative embodiment, tower absorber may have a construction in which at least above all by the flow of the spray level zone Razi in the direction parallel to the flow of exhaust gas, and at least below according to the flow of the spraying step includes spray nozzles for spraying the absorbing liquid in the direction against the flow of exhaust gas.

Installation for flue gas desulfurization according to the present invention has an important essential characteristic consists in the fact that the tower absorber has a structure in which the channels of the tower pass through the upper portion of the circulation tank, i.e. made in one piece construction in which the upper portion of the circulation tank forms part of the channel of the tower, so the tower absorber is self-supporting and, moreover, plain that ensures its high durability and eliminates the need for valve installation section of the channel of the tower.

In the plant for flue gas desulfurization of such design is important to ensure the effectiveness of the desulfurization of flue gas at least equal to the efficiency of the apparatus for desulfurization of flue gas prior art, having a vertical channel tower absorber. You can easily assume that for overcoming weeks is šnē absorber, that is, the growth height of the tower absorber, will be sufficient to design the tower absorber horizontal type so that the direction of gas flow was limited to the horizontal direction, and the absorbing liquid sprayed in the direction to the gas flow, thereby providing the possibility of reducing the height of the tower.

However, if the sprayed absorbing liquid in the horizontal direction, when a relatively low flow rate of exhaust gas, it decreases the efficiency of gas-liquid contact due to the fall of the sprayed droplets under the action of gravity, and when a relatively high flow rate of exhaust gas, on the other hand, a growing number of spray droplets captured exhaust gas, thereby not only cause corrosion or wear of the subsequent plots, but also causes a problem of increasing the consumption of energy input due to the loss of the absorbing fluid and the problem of failures in the worst case. In General, it is difficult to direct exhaust gas into the tower absorber in a horizontal direction or in a direction other than vertical, so that the exhaust gas entered into a gas-liquid contagios is high efficiency desulfurization and turning to dust can be obtained even with a tower absorber, without design, in which the gas flows vertically, under certain conditions.

This will be described below in detail.

The time of contact with the sprayed absorbing liquid can be increased if given the opportunity exhaust gas to flow in a direction, which at least is not vertical, but preferably horizontal, and moreover, setting a large value of the horizontal section of the path of flow of the exhaust gas. Therefore, it is possible to reduce the height of the tower absorber to facilitate the work of the channel and to reduce the inhomogeneity of the gas stream.

At the highest flow the steps of spraying the absorbing liquid is provided by the suction effect of the ejector) with less heterogeneity of the exhaust gas by spraying the absorbing liquid in the same direction of flow as the exhaust gas (in the direction parallel to the flow). In addition, if the absorption liquid is sprayed before passing through the exhaust gas, the liquid is not dissipated in which to enter the ASS="ptx2">

At the lowest flow speed of spraying the absorbing liquid is the last in a gas-liquid contact with the sulfur oxides or dusts in the exhaust at a relatively high speed by spraying the absorbing liquid in the opposite direction (counter-current direction) relative to the direction of exhaust gas. So there is not only a high removal efficiency, while also going fogs, captured and scattered along with waste gas from above on the flow side, which leads to reduction in the number of fog, scattered in the direction of the lower thread. In order to reduce the deviation in the spray because of the stepped arrangement of vertical locations on the steps of spraying (differential pressure), it is advisable to place the spray pipe in the transverse direction (i.e. horizontally).

Tower absorber and the circulation tank, providing the possibility of free fall to the spray drops are made in one piece design so that it can be extended contact time of the droplets of the sprayed absorbing liquid with the exhaust gas. The bottom Basni tank absorber without their accumulation.

In the above setting may be provided by the tool for removing the sprayed absorbing liquid and the direction of the latter in the circulation tank on the inclined part of the bottom of the intake channel. This tool is for removing the sprayed absorbing liquid and the direction of the latter in the circulation tank may be of a design adapted for directions derived liquid so that it fell in the direction tangential to the horizontal cross section of the peripheral wall of the circulation tank, and, moreover, this construction can include a drain or ditch, placed on or in an inclined part of the bottom of the intake channel.

In the tower absorber of the prior art it is necessary to establish a set of mixers for uniform distribution of the oxidizing air inside the circulation tank. For this reason, the required energy consumption for mixing. In the present invention, in particular, due to the presence of horizontal installation of desulfurization with a sloped bottom inlet port of the sprayed absorbing liquid, on the contrary, appears in or on the inclined part of the bottom of the intake channel, where the second) and then falls into the circulation tank.

Placing a drain or grooves on or in an inclined part of the bottom of the intake channel at a point offset from the center ensures that the falling of the slope in the circulation tank, the liquid falls in the direction tangential to the horizontal cross section of the peripheral wall of the circulation tank. The mass flow of the falling liquid is thousands of tons/hour in the plant for flue gas desulfurization, mounted in combination with the boiler CHP with a capacity of about 200 MW, and if this liquid then collect and reset in the circulation tank, it will circulate in it. Thus, the liquid in the circulation tank is circulated without the help of any mixers due to the energy of this discharged fluid. This provides the possibility of excluding mixers for distribution of air supplied into the liquid in the circulation tank, and agitators for mixing the liquid in the circulation tank. Since the liquid in the circulation tank is circulated without the aid of stirring, the resulting particles of gypsum also can not accumulate on the bottom of the circulation tank due to fluid circulation. Thus, it can be excluded stirrer, platinova tank and reduce energy costs.

Moreover, the amount of air lodged in the circulation tank, can be reduced by applying an oxidizing air absorbing fluid in the fluid collected in the sink or the groove in the inclined part of the bottom of the intake channel, or in the area near the surface of the liquid in the circulation tank, where the liquid moves quickly.

Horizontal wet plant for desulfurization of flue gas according to the present invention may be so designed that the area perpendicular to the gas flow cross-section of the intake channel, including the spray pipes with spray nozzles placed on the many steps in the direction of gas flow, speed increases in the direction of gas flow, and the area perpendicular to the gas flow cross section of the low(high) flow area of the inlet port is smaller than the area perpendicular to the gas flow cross section of the gas path flow (placed) between the inlet and outlet channels and above the circulation tank.

As a multi-stage spray nozzle is placed in the inlet channel, the density of the absorbing liquid sprayed from raspy is icene sectional area perpendicular to the gas flow inlet port in the direction of gas flow, for example, when performing a bottom surface of the intake channel in the form of an inclined surface density of the sprayed absorbing liquid in the direction of gas flow in the inlet channel may be aligned so that the desulfurization of exhaust gas will flow equally in each zone of the channel.

The efficiency of absorption of SOxin the exhaust increases, as will be more high velocity gas flow in the inlet channel. Due to the increase of gas flow rate in the intake channel will have to reduce the cross-sectional area of the intake channel. If the gas is fed to the exhaust channel, while having a low flow rate, such as described above, the load on the gathering mists in demister increases. Due to the fact that the area perpendicular to the gas flow cross section of the low flow area of the inlet port is smaller than the area perpendicular to the gas flow cross section of the gas path flow (placed) between the inlet and outlet channels and above the circulation tank, which provides the possibility of reducing the speed of the gas stream, captured in the gas stream and dispersed the mists subjected to the free fall is knosti inlet channel is in the form of an inclined surface, the spray nozzle of the low flow stage spray pipes, placed on the many steps in the direction of gas flow in the inlet channel, are essentially in the same horizontal plane so that they are not immersed in the sprayed absorbing liquid flowing along the bottom surface of the intake channel.

In order to prevent an increase in the load on the gathering mists of demister because of the growth velocity gas flow in the inlet channel and prolong the time of contact of the sprayed droplets absorbing fluid exhaust gas up to the maximum possible value to ensure effective contact and reducing the number of fogs, which are scattered below the flood demister that create resistance means to restore the surfaces of the droplets of the sprayed absorbing liquid and scattered mists can be placed between the steps of spraying and demisters.

In the plant for desulfurization according to the present invention the exhaust gas that has passed through the zone splashing, flowing in the direction of the lower thread grasping the fogs, but passes through the liquid film formed scattered fog, the Roadster. When exhaust gas passes through the liquid film, is achieved by the specified percentage of desulfurization. In the tower absorber unit for desulfurization according to the present invention, the surface (boundary layer) of the droplets of the sprayed absorbing liquid, captured exhaust gas in the tower absorber is not restored due to the small difference in flow velocity between the droplets and the waste gas and due to the fact that it already becomes saturated SOxand thus less conducive to growth efficiency desulphurization even if, for example, a sufficient contact area between the area of the spray and demisters. However, the placement creates resistance means, such as a porous plate, between the zone of spray and demisters provides not only the collision scattered mists and spray droplets on creating resistance means and thereby their collection, but also the recovery of the liquid film with the passage of exhaust gas through the liquid film formed on create resistance to the tool collected through the fog and drops, thereby effectively carrying out the desulfurization reaction.

It should be noted that creates SOP in case if it is capable (save) the surface of the mists sprayed absorbing liquid and drops, so in this case, you can expect a certain degree of effect desulphurization.

Chilled, turned into dust and sweet so the fogs, captured exhaust gas, are displayed in the capture zone of the mist for use recycling; thus prevented from scattering toward the lower stream side of the tower absorber and, therefore, the formation of corrosion, located downstream components, as well as drainage.

Creates resistance means for updating the surface of the sprayed droplets can be represented as: (1) drain having an upper end, rotated in the direction of the upstream side wall of the channel, and the bottom just before the high flow demisters, (2) a set of plates, placed at distances that define the trajectory of the stream in the direction of gas flow, (3) porous plate. When using multiple plates, each of which may be a plate having corrugations areas. When using a porous plate, you can install a flat porous plate so that its flat surface is stretched in healthy lifestyles is atom, each plate has a flat surface extending in the direction parallel to the gas stream.

Creates resistance means can be placed in the path of flow of the exhaust gas downstream relative to the inlet port and upstream relative to the circulation tank and upstream relative to demister in the discharge channel.

If the bottom of the channel having a resisting means, placed on it, has a bottom surface that slopes downward to the circulation tank, and the gap for drain formed in rendering the resistance of the medium on the part attached to the bottom surface, mists and droplets collecting on resisting tool, easy to fall into the circulation tank. It is possible to provide a washing system which resisted a tool that uses pop-up water formed in the equipment for removing plaster, or additional water.

Installation for desulfurization according to the present invention may have a construction in which the outlet port is installed at least two demister so that the vertical size secenianave drain on murine surface of the pipe at the top of the thread relative to the high flow of demister. Thus by increasing the speed of the gas stream past flows along murine surface of the pipe in the "crawling" on murine surface, and a large number of scattered fog reaches demister. If scattered along murine pipe surface fogs removed through drain pipes are placed before the high flow demisters, the performance of the shaped demisters may not be reduced even when the load increases fog on the shaped demisters. Pipe for removing the collected fog, leading to the circulation tank, installed in the groove formed in the pipe to install the end of demister, providing a large area of the vertical section of the high flow of demister than the area of the vertical section of the exhaust pipe. The washing system of demister provides for the use of flush water for those downstream of demister as wash water for located upstream of demister, and the wash water used for the high flow of demister, may be returned to the circulation tank.

Horizontal installation for desulfurization according to the present izaberete the pipe, while on the site wall surface placed in the field, free from the spray droplets and formed between the spray nozzles can be installed for preventing the release of gas.

The above construction is such that in it the spray pipe and pipe supports are not placed inside the inlet channel. Hence, the spray droplets remain for a long time in the tower absorber without collision on these inserts, leading to the termination of the reaction, the absorption of gas SO2and thus the spray droplets can be effectively promote the reaction of desulfurization.

Internal murine surface of the inlet channel can be effectively used, since the spray nozzles are mounted on murine surface of the intake channel. Depending on the type and flow rate of exhaust gas introduced into the inlet channel, the concentration of the sulfur oxides contained in the exhaust and similar products, may change the quantity of the sprayed absorbing liquid for each group of spray nozzles located separately on the side walls and the ceiling wall, or can ismenias the key or in each specific area of the surface of the ceiling wall.

In the setting of prior art spray pipe and pipe supports are placed inside the tower absorber and is made of high quality material to prevent corrosion, as used absorption liquid is in a strong acid environment. In the installation according to the present invention, tubes, and similar items, on the contrary, are placed outside the tower absorber, and therefore there is no need to use such high-quality material.

The probability of contact of the sprayed absorbing liquid with the exhaust gas increases due to means to prevent the release of gas, which is set on a plot of murine surface, located in the free zone from the spray droplets formed between the spray nozzles.

A means of preventing the release of gas may consist of, for example, the guide plates having a shape extending along the angle of spraying the absorbing liquid from the spray nozzles, or the shape of the recessed grooves defined by a decrease in the inward murine internal surface of the inlet channel extending in the direction of gas flow. When ispolzuyutsa surfaces of the recessed grooves. In this case, can be effectively prevented emissions.

Horizontal installation for desulfurization according to the present invention, the spray nozzle can be installed on a ceiling section of the circulation tank for spraying the absorbing liquid in the direction towards the liquid surface in the water tank so that scattered the mists were removed by spraying the absorbing liquid from the spray nozzles. Thus, if the spray droplets are ejected to the surface of the liquid in the circulation tank, the exhaust gas gets the opportunity to run, shaking the drops from moving to the surface of the liquid, and due to their larger specific weight in comparison with a specific gravity exhaust gas dispersed the mist contained in the exhaust will have to move right under the force of inertia and therefore to collide on the spray drops from the ceiling area, moving towards the surface of the liquid in the circulation tank, and as a result accumulate.

As a variant embodiment, the design may contain a partition installed on potolochnoe liquid in the circulation tank to contain the spray nozzle for spraying the absorbing liquid, mounted on the lower end of the partition. Another option involves the presence of deformed ceiling surface above the circulation tank, which acts in a downward direction so that the flow of exhaust gas temporarily deviates to near the surface of the liquid in the circulation tank, and installation of spray nozzles on an acting stretch ceiling. In any of these designs are likewise increases the collection efficiency of scattered fog on demister.

Horizontal installation for desulfurization according to the present invention, all set in the area of spraying the spray pipe in the inlet channel installed on opposite ends of the side walls of the inlet channel for the horizontal intersection of the trajectory of the gas flow in the inlet channel and the filing of absorbing fluid from the opposite ends.

The horizontal position of the spray pipes mounted on opposite side walls of the inlet channel, ensures that the resistance provided by exhaust gas from the pipes varies equally from opposite horizontal sides towards the Central a gas-liquid contact, that, in turn, contributes to increase the efficiency of desulfurization. In addition, the same amount of the absorbing liquid may be fed through the opposite side walls in horizontal spray pipe, and therefore this number may be filed symmetrically with the same ratio of horizontal opposite sides to the Central plot of the spray pipe in the direction of the respective spray nozzles.

When the spray tubes are placed horizontally inside the inlet channel cross-sectional area of the spray pipes stepwise decreases from the site, the adjacent side wall of the intake channel to the station located in the Central part of the inlet channel. Thus, even if the flow rate of the absorbing fluid speed is reduced from the surface of the side wall area of the spray to its Central part, the flow rate of sludge (poison liquids) inside the spray pipes may essentially remain constant in any place inside the spray pipes. Maintaining the flow rate is essentially constant at any place inside the spray pipes thus, it is possible to prevent the deposition and Yu, the inner diameter of the Central section in the intake channel will be less than the internal diameter of the other, and you can establish a foothold in the Central section in the intake channel, where the inner diameter of the tube is smaller, thereby giving mechanical strength to the Central section having a smaller cross-sectional area. Bearing performs the function of generating resistance element for the flow of exhaust gas in essentially the Central part of the spray pipe so that the flow of exhaust gas in the zone tower absorber with spray pipes placed in it, is not subject to perturbation, and the velocity of the gas stream is aligned. In addition, if the spray tubes are placed horizontally inside the inlet channel, the spray nozzle can be placed on the bottom wall of the spray pipe, respectively. This ensures that when you stop spraying the absorbing liquid, the possibility of absorbing the liquid remaining in the tube, to flow under the force of gravity, so to prevent the deposition and accumulation of solids of the absorbing liquid in the spray pipe, and thereby solves the problem of the clogging of the spray pipe.

More to the current in a downward direction, or a flat plate similar to the reflective wall and overhanging ceiling area) can be installed on murine surface of the ceiling at the top of the thread relative to demister in the discharge channel so that the entire gas flow is bent above the circulation tank and is rotated again in the upward direction at the inlet zone of the gathering mists. In this design the gas flow is turned in the downward direction above the circulation tank and then turns again in the direction upwards, so scattered fog out of the gas stream and fall into the absorption liquid in the circulation tank. Thus, the number of scattered fog, reaching demister is greatly reduced. If the angle of inclination of the inclined plate relative to the horizontal direction or the length of the reflecting partition member in the path of gas flow, set within a certain range, the fog can not be deposited on the insert (inclined plate or reflective wall), and therefore there is no problem of adhesion due to collision mists of the insert.

Predefined angle with respect to the horizontal direction of the inclined plate set which can be greater than the angle of inclination of the bottom surface of the inlet channel, related circulation tank, and thereby be given the opportunity to turn the direction of the gas flow to the circulation tank. In this case, if the vertical sectional area of the entrance to the path of gas flow under changing gas flow obstacle is no longer at least a vertical cross-sectional area of the inlet channel, will not be effective reduction of the gas stream.

Box type louvers 2 can be placed on the bottom murine surface of the channel before demisters or many steps can be set plate on which there is a collision and which have a cross section with a recess (for example, U - or V-shaped cross-section), is facing up relative to the gas flow, for example, two or more stages in a zigzag order and lattice location across the path of gas flow across the outlet at the top of the thread relative to demister. Thus, it can be reduced the number of scattered mists without changing the design of the tower absorber. In the case of plates, on which there is a collision and having a cross-section with a groove, it is possible to prevent an increase in pressure loss when using zigzagoobraznoi collision plate, having a cross-section with a groove, when viewed in the direction of gas flow, washed with water, this site does not arise any problem of adhesion due to drying of the sludge. In the case of insert-type blinds, the installation angle of the blinds in the range from 5 degrees to 40 degrees relative to the horizontal direction, the surface and back insert are always soaked scattered fog, and therefore the latter can be removed without causing problems adhesion on this section.

(3). To increase the efficiency of the method of spraying the slurry direction of the spray slurry nozzles in murine surface of the tower absorber can be rotated in a downward direction relative to the tower absorber, i.e. in the opposite direction from murine surface of the tower absorber. This makes it possible to prevent collision of murine surface of the tower absorber mist spray of the slurry and to prevent re-dispersion.

(4). If the direction of the spray slurry nozzles installed in a downward direction relative to the horizontal direction can be reduced by the amount of dissipation of fog. Murine surface of the tower absorber napravlenii up after flowing down over the circulation tank and in the direction of the circulation tank. This ensures that scattered the mists are released from the gas stream and discharged to the liquid surface of the slurry inside the circulation tank so that the number of scattered fog, reaching demister can be reduced significantly.

Thus, in any of the above constructive and technological solutions (1) to (4) can be greatly reduced amount of dissipation to demister fogs. The decrease in the efficiency of desulfurization and the increase in the pressure loss at this site are excluded.

Horizontal installation of desulphurization, according to the present invention may be so designed that it further includes means for absorbing fluid discharge from the circulating tank and neutralize its limestone particle size greater than the particle size of the gypsum obtained by neutralization of the absorbing liquid limestone; means for recycling the neutralized liquid to the spray in the intake channel.

If the concentration of particles of gypsum in the extracted absorbing fluid is high, can be set to a separator for separating the absorbing liquid with small ke small quantities of particles of gypsum is recycled to the spray in the intake channel.

The main reactions in the plant for desulfurization according to the present invention are the following:

Absorbing liquid containing water as a primary component) absorbs SO2in the exhaust for the formation of H2SO3that is oxidized by air for the formation of H2SO4(diluted sulphuric acid). H2SO4neutralized by limestone (CaCO3for the formation of gypsum (CaSO42H2O).

(Reaction absorption) H2O + SO4= H2SO3< / BR>
(Oxidation reaction) H2SO3+ 1/2 O2= H2SO4< / BR>
(Neutralization reaction) H2SO4+ CaCO3+ H2O = CaSO42H2O + CO2< / BR>
According to the present invention in the blown air in the circulation tank to oxidize the sulfurous acid absorption liquid has a pH of about 2-3 (in other methods of this technology pH 4-5). This ensures a high oxidation rate, and you only need less air and less energy consumption for agitators for precise separation of the oxidation air. In addition, it uses coarse limestone, and so there is no need for chopping know what this can easily be separated from the gypsum particles of small size (typically having a particle size of from 20 to 100 MK), and limestone particle size of about 10 times the particle size of less gypsum is mixed with gypsum than the limestone with the same particle size as gypsum. Thus, even if you use a large number of limestone, as gypsum is reduced, and the performance of desulfurization increases. In this case, the absorbing liquid may be mixed by stirring, and/or barbotirovany air to prevent layering of particles of plaster around the particles of limestone. The reaction of absorption may contribute to control for the number of oxidizing air so that the concentration of oxygen dissolved in the absorbing liquid after air oxidation in neutralizing device, etc. is 1 part per million or more.

The present invention includes a sign, representing a combination of the above signs.

The invention is illustrated by reference to the accompanying drawings, in which:

Fig. 1 is a schematic perspective view of the installation of a wet-type flue gas desulfurization according to the first variant embodiment of the present invention,

Fig. 2 is a view on an enlarged scale raspis the unit wet-type flue gas desulfurization according to the second variant embodiment of the present invention;

Fig. 4 is a cross section on a vertical plane (schematic view) installation of a wet-type flue gas desulfurization, shown in Fig. 3, and type associated with it devices;

Fig. 5 is a curve illustrating the relationship between the flow rate at the inlet tower absorber, the percent desulfurization and loss of pressure, as shown in Fig. 1;

Fig. 6 curves illustrating the relationship between the flow rate at the inlet tower absorber, as shown in Fig. 1;

Fig. 7 and Fig. 8 curves illustrating the results of tests conducted to confirm the effectiveness of the installation shown in Fig. 3 and 4;

Fig. 9 is a view of a modification of the discharge channel in the tower absorber in the second variant embodiment of the present invention;

Fig. 10 is a cross-section on the horizontal plane (schematic view) installation of a wet-type flue gas desulfurization according to the third variant embodiment of the present invention;

Fig. 11 is a side view of the installation for desulfurization, shown in Fig. 10;

Fig. 12 is a view of the inlet channel tower absorber shown in Fig. 10 and Fig. 11, when viewed in the direction of gas flow (in fact there is no front end wall);

Fig. 14 is a graph of the velocity profile of the gas flow in the inlet channel, shown in Fig. 12;

Fig. 15 is a view of a modification of the spray pipes shown in Fig. 12 (actually there is no front end wall);

Fig. 16 is a section along line a - a of Fig. 15;

Fig. 17 is a side view (schematic view in cross-section) installing a wet-type flue gas desulfurization according to the fourth variant embodiment of the present invention;

Fig. 18 is a view of a modification of the installation of a wet-type flue gas desulfurization, shown in Fig. 17;

Fig. 19 is a view of another modification of the installation of a wet-type flue gas desulfurization, shown in Fig. 17;

Fig. 20 is a cross - section along the line a - a of Fig. 19;

Fig. 21 is a view of a modification of the installation of a wet-type flue gas desulfurization, shown in Fig. 19;

Fig. 22 is a view of another modification of the installation of a wet-type flue gas desulfurization, shown in Fig. 17;

Fig. 23 is a view of another modification of the installation of a wet-type flue gas desulfurization, shown in Fig. 17;

Fig. 24 is a curve illustrating the results of the cold test model for ustanovki shown in Fig. 23;

Fig. 25 - curves illustrating the results of the analysis raselimanana scale 1:5 relative to the real installation;

Fig. 27 is a schematic view of installation of a wet-type flue gas desulfurization according to the fifth variant embodiment of the present invention;

Fig. 28 is a view illustrating the device structure of neutralization in the fifth variant embodiment;

Fig. 29 is a graph illustrating a change over time of the percentage desulfurization (curve a), when the absorbing liquid is stirred by the neutralization device, and the variation over time in the percent desulfurization (curve b), when the absorbing liquid is not mixed;

Fig. 30 is a graph illustrating the relationship between the amount dissolved in the absorbing liquid oxygen and the percentage of desulfurization in the fifth variant embodiment;

Fig. 31 is a view of a modification unit for desulfurization, shown in Fig. 27;

Fig. 32 is a schematic view of installation of a wet-type flue gas desulfurization according to the sixth variant embodiment of the present invention;

Fig. 33 is a view illustrating the construction of demister in the installation shown in Fig. 32;

Fig. 34 is a detailed top view of the section of demister in the installation shown in Fig. 32;

Fig. 35 is a detailed view of a modification of part of demister in the installation shown in Fig. 32;

Fig. 36 - is in the sixth variant embodiment of the present invention, and the rate of dissipation of fog (curve b) when there is no drain;

Fig. 37 is a schematic view of installation of a wet-type flue gas desulfurization according to the seventh variant embodiment of the present invention;

Fig. 38 is a perspective view of a section of a vertical plate in the installation shown in Fig. 37;

Fig. 39 is a view of a modification of the vertical section of the pipe shown in Fig. 38;

Fig. 40 is a schematic view of installation of a wet-type flue gas desulfurization according to the eighth variant embodiment of the present invention;

Fig. 41, 42 and 43 types of modifications, as shown in Fig. 40;

Fig. 44 is a graph illustrating a comparative analysis between the number of mists (curve a) at the inlet of demister when installed porous plate, and the number of mists (curve b) in the intake when there is no porous plate;

Fig. 45 is a view of a modification of the installation shown in Fig. 40;

Fig. 46 - section installation of a wet-type flue gas desulfurization according to the ninth variant embodiment of the present invention, when viewed in the direction of gas flow;

Fig. 47 - section along the line a - a, as shown in Fig. 46;

Fig. 48 is a schematic view of the installation of wet - type of modification installation, it is shown in Fig. 48;

Fig. 50 is a graph illustrating a comparative analysis between the velocity dispersion of fog in the tenth and the first variants of the embodiment of the present invention;

Fig. 51 is a view of another modification of the installation shown in Fig. 48;

Fig. 52 is a view of another modification of the installation shown in Fig. 48;

Fig. 53 - section installation of a wet-type flue gas desulfurization according to the eleventh variant embodiment of the present invention, when viewed in the direction of gas flow;

Fig. 54 is a view along line a - a in the installation shown in Fig. 53;

Fig. 55, 56, 57 - types of modifications, as shown in Fig. 53 and 54;

Fig. 58 is a schematic view of installation of a wet-type flue gas desulfurization according to the twelfth variant embodiment of the present invention;

Fig. 59 is a view along line a - a, as shown in Fig. 58;

Fig. 60 is a view along line B - B, as shown in Fig. 58;

Fig. 61 - sort of modification installation for desulfurization, shown in Fig. 60;

Fig. 62 is a view of a modification unit for desulfurization, shown in Fig. 60;

Fig. 63 is a diagram illustrating the schematic manufacturing process of installing a wet-type desulfurization timeline

Below will be described in more detail the present invention through its variants embodiment and with reference to the accompanying drawings. The present invention, however, is not limited to the described variant embodiments.

Fig. 1 to 5 illustrate the installation of a wet-type flue gas desulfurization according to one variant embodiment of the present invention. Fig. 1 is a schematic perspective view of the installation of a wet-type flue gas desulfurization; Fig. 2 is a view in enlarged scale of the area of the spraying pipe installation for desulfurization; and Fig. 3 - section in the plane (schematic view) of the upper section, as shown in Fig. 1. This installation includes the spray pipes 4 that are installed on the many steps in the direction of gas flow and in many rows in the direction perpendicular to the gas flow, horizontally extending across and within the inlet channel 3 for exhaust gas 1 in the absorber tower 2, which has a path of exhaust gas flow in the horizontal direction or in a direction that is at least different from the vertical. Step number 4 spray pipes and the number of steps be selected more appropriate number. As shown in Fig. 1, the upper stream of the spray pipe 4a spray pipe 4 is installed for spraying the absorbing liquid in the same direction as the flow of waste gas 1 (spray pipe parallel flow and the low flow spray pipe 4b is installed for spraying the absorbing liquid in the direction opposite to the direction of flow of the exhaust gas 1 (counterflow spray pipes). These spray pipes 4a - 4b form a zone of spray in the intake channel 3. The circulation tank 7 is installed downstream and under the inlet channel 3. As shown in Fig. 4, the circulation tank 7 is supplied razmeshivaem means 8 mounted on the side wall of the circulation tank 7, the purge pipes for oxidizing air, installed close to the blades razmalyvaemogo means 8, the pump 11 and the circulation pipe 12 absorbing fluid for circulation last inside the circulation tank 7 and feed it into the intake channel 3, a supply pipe 13 for supplying new, based on calcium absorption liquid in the circulation tank 7, pipe 14 and a pump 15 for removal of the absorbing W the expansion means 8 may include oxidative mixer 8a for fine separation of the introduced oxidizing air and agitators 8b exclusively for mixing the absorbing liquid inside the circulation tank 7.

The outlet channel 19 is provided on the release exhaust gas absorber tower 2, i.e. at the site downstream above the circulation tank 7, and includes having corrugations disc demister 16 and pipe 18 (see Fig. 4) for removing mist collected in demister 16 in the circulation tank 7. The slurry of the absorbing liquid selected from the circulation tank 7 by a pump 15 for pumping the absorbing liquid thickens in the equipment 20 to extract gypsum 22.

All settings are illustrated in all variants of embodiments of the invention may be equipped with oxidative agitators 8a and agitators 8b for mixing the absorbing liquid, vent pipe 10 for the oxidation air tubes 12 for circulating the absorbing liquid, a supply pipe 13 for supplying new, based on calcium, absorbing fluid, a pipe 14 for removal of the absorbing fluid and equipment 20 for the extraction of gypsum, some of such devices are illustrated in the accompanying drawings.

The absorber tower 2, which includes an inlet port 3 and outlet channel 19, is designed to determine the direction of flow of exhaust gas in horizontais upper side wall self-supporting circulation tank 7, so that the whole system was a system of self-supporting type. It may be appropriate to install reflective walls 24 (see Fig. 4) at the connection point between the horizontal section having an exhaust channel 19, and the side wall of the circulation tank 7 to prevent the dissipation of fog, raised gas stream.

Thus, the apparatus for desulfurization is made as a unitary construction in which the upper portion of the circulation tank 7 forms the parts of the turret 2 horizontal absorber. Thus installing desulphurization is self-supporting and, moreover, has a simple structure. Thus in contrast to the design of the tower vertical absorber of the prior art in the plant for desulfurization according to the present invention is not necessary fittings for installation of the pipe section of the tower, and the installation height of 20-40 meters can be installed independently without the hardware to support it, resulting in a relatively low cost equipment.

In the plant for flue gas desulfurization odnovalentnogo type according to the above construction exhaust gas is fed into the intake channel 3 towers which flows from the very high flow spray pipes 4a. At this time, the exhaust gas 1 is straightened due to the effect of the ejector highest flow spray pipes 4a, and at the same time is cooled to the saturation temperature of the gas is partially converted into dust (sprayed) and obeserved. It should be noted that to prevent damage to the interior of the tower during the flow of high temperature gas in the absorber tower 2 when a break in power supply to power stations, it may be preferred installation for water spray (not shown) upstream relative to the most high flow spray pipes 4a. The exhaust gas 1 into dust and obeserved eventually to a predetermined value depending on the regulation in the field of ecology that exists in each country, with the help of located more low flow spray pipes 4 (including the low flow spray pipe 4b). The low flow spray pipe 4b're spraying the absorbing liquid in counter-flow exhaust gas 1 in order to perform cooling, turning to dust and exhaust gas desulfurization 1, and in addition, in order to collect fog, scattered from finding the(differential pressure) vertical locations of any spray pipes 4a-4b, it makes sense to place the spray pipes 4 in the transverse direction (horizontally), as shown in Fig. 1.

The spray pipe 4 is of such a construction in which the diameter is gradually reduced from the end of the base toward its end, as shown in Fig. 2, so that the number of spray droplets (shown by a dotted line), the velocity of the spray and similar characteristics are aligned at the end of the base and the end of the pipe. Also, it would be advisable to spray nozzle 6 of the spray pipes 4 was located ledges in the direction of flow of exhaust gas or in the direction perpendicular to the flow of exhaust gas from the spray nozzles 6 adjacent the spray pipes 4. Thus there is a possibility to increase the efficiency of gas-liquid contact of the absorbing liquid with the exhaust gas 1 by installing nozzles in such a way that the conical fan spray droplets absorbing fluid, shown by the dashed line in Fig. 2, do not overlap with each other. In particular, it will be important that the spray nozzle 6 of the spray pipes 4 have been set so that the droplets parallel="ptx2">

Chilled, turned into dust and sweet thus the exhaust gas 1 is unloaded from the absorber tower 2 after the removal of captured mists.

On the other hand, limestone slurry, which represents the absorbing liquid is supplied through the supply pipe 13 into the circulation tank 7 and is mixed with the sludge in the circulation tank 7. Then mixed absorbent slurry sprayed from the nozzles 6 into the inlet channel 3 through the circulation pump 11 and is brought into contact with exhaust gas 1; then freely discharged directly into the circulation tank 7 or reset on the bottom of the intake channel 3, having a downward inclination with respect to the circulation tank 7, flowing in a natural way along the slope of the bottom back into the circulation tank 7.

Absorption liquid is returned to the circulation tank 7, is subjected to restore its pH.

In the circulation tank 7 air originating from the purge pipe 10 for oxidizing air is dispersed into the absorption liquid in the form of small bubbles through the mixer 8a, and here H2SO4formed by the absorption of SOx

Cooling and turning to dust exhaust gas 1, and the absorption of sulfur oxides in the plant for desulfurization of the present invention are in the process of spraying, in which the absorption liquid is sprayed into the flow of exhaust gas and therefore the effectiveness largely depends on the reflected (heterogeneous) gas flow. When spraying the absorbing liquid in a direction parallel to the flow of exhaust gas through above all the flow of the spray pipe 4A in the installation according to the present invention phenomenon ejector is used for p the surrounding fluid and the corresponding flow rate of exhaust gas 1. On the other hand, the spray droplets are captured in the exhaust gas stream in the absorber tower 2 and dispersed in a large amount in the downward direction to the exhaust channel 19. It does not create a useful effect, since it leads to corrosion at the bottom of the stream channel and the devices and their components. For this reason, set demister 16 in the outlet channel 19. However, the number of mists and droplets scattered from above all the flow of the spray pipes 4a, is very large, and hence, proves to be too much load on demister 16 for gathering mists, causing re-scattering fog and resulting in a complicated construction of demister 16. The inventors conducted various tests and presented a review of measures to reduce the load of the fog and into the inlet of demister 16 and presented the results of research, which are outlined below. In the result it was found that when installing at least most low flow spray pipes 4b so that the spray from them absorbing liquid contained in countercurrent contact with waste gas 1, a large number of mist scattered from below the thread is about, load fogs on demister 16 can be substantially reduced, so that the tower 2 absorber of this type is suitable.

To enable reduction in any degree of scattering in the downward direction to the exhaust channel, and extending the time of contact of the exhaust gas 1, as well as the possibility of extracting the maximum extent of the sprayed absorbing liquid, it is advisable to perform the inlet channel 3 is in one piece with the circulation tank 7.

Moreover, if in the tower absorber of the type intended for flow of exhaust gas in a horizontal direction or a direction other than vertical, the flow rate of exhaust gas within the absorber tower 2 is too low, the spray droplets will be deflected from the flow of exhaust gas under the action of gravity and fall to the bottom of the tower 2. Thus, even in the case of selecting the maximum contact distance in the same horizontal direction will not be gas-liquid contact. Conversely, if the flow rate of exhaust gas 1 is too high, it is too large, the number of captured fog, causing the problem of the large military pressure loss.

As a result of various reviews submitted for the conflicting problems associated with the differential velocity of the gas stream between the high and low flow rates, as described above, the inside of the absorber tower 2, it was found that there is an optimum range for the gas flow rate inside the tower 2 absorber. In Fig. 5 and 6 shows curves illustrating the relationship between the flow rate at the inlet of the absorber tower 2 and the percentage of desulfurization, the pressure loss and the amount of mist at the inlet of demister 16 under the conditions that the gas flow is 3000 m/h (reduced to standard conditions), and the concentration of SO2equal to 2000 ppm (part./million). The higher the velocity of the gas flow, the higher the percentage of desulfurization. The velocity of the gas stream is preferably 5 m/sec or more. However, if the velocity of the gas is equal to or more than 15 m/s, then again reduced the percentage of desulfurization by reducing the time of gas-liquid contact or similar characteristics. Similarly, the amount of mist at the inlet of demister 16 increases sharply with increasing gas flow rate. Therefore, to minimize the pressure loss and the amount of mist at the inlet of demister 16 and increasing the percentage of desulfurization m/S. It was also found that the amount of mist at the inlet of demister 16 decreases when the absorption liquid is sprayed in the directions parallel to and forward of the gas stream in combination (as shown in curve b of Fig. 6), compared with the amount of fog when absorbing liquid is sprayed only in the direction parallel to the gas stream (as shown in curve a of Fig. 6).

Experimental example 1

An experiment was conducted on the exhaust gas processing 1 the wet-type desulfurization shown in Fig. 3 and 4. The test conditions were the following values.

The gas flow rate (reduced to standard conditions): 3000 m3/h

The concentration of SO2: 2000 ppm million

The gas temperature at the inlet: 150oC

The amount of oxidation air (reduced to standard conditions): 30 m3/h

The number of stages in the spray pipes: 3

The ratio of liquid - gas (reduced to standard conditions): 20 l/m3< / BR>
The size of the intake tower absorber: length 350mm x width 350 mm

Excessive percentage of limestone: 10%

The results of the test

The percentage desulfurization: 80%

The percentage of oxidation: 99.7% of the features): 100 mg/m3< / BR>
Even when viewed from the inner region after operation for 100 hours was not observed layering and corrosion on the upper and lower stream sides of the absorber tower 2.

Comparative experimental example 1

Unlike example 1, in which the direction of spraying the absorbing liquid from the first spray pipe (high flow spray pipes 4a) was (in parallel) to the exhaust gas flow, spray, liquid, spray before passing through the exhaust gas 1 in the absorber tower 2, made to flow to the upstream side of the inlet channel 3, resulting in a reduced level of the absorbing liquid in the circulation tank 7. However, after passing the exhaust gas 1 this level of liquid in the circulation tank 7 has returned to its original value.

The percentage desulfurization: 82%

The percentage of oxidation: 99.7% of

Loss of pressure in the tower: 110 mm H2O

The number of fogs in the production (reduced to standard conditions): 110 mg/m3< / BR>
As a result of examination of the internal region after operation for 100 hours was observed accumulation of solid particles to a large degree ICIE from example 1, in which the direction of spraying the absorbing liquid from the third spray pipe (the lower the flow the spray pipe 4b) was (in the opposite direction to the flow of exhaust gas transfer through the outlet channel 19 simultaneously with the passage of the gas was very sharp, which has resulted in low level of liquid in the circulation tank 7 and to the impossibility to use the installation. Then in the drain saddle (not shown) in the outlet channel 19 was observed a large number of drainage.

The second variant of the embodiment of the present invention

Horizontal installation for desulfurization, shown in Fig. 3 and 4, has such a structure that the cross-sectional area perpendicular to the gas flow inlet channel 3, with the spray nozzle 6, located on the many steps in the direction of gas flow, increases speed, and the cross-sectional area perpendicular to the gas flow lowest flow area of the intake channel 3, is less than the cross-sectional area perpendicular to the gas flow cross section of the path of gas flow between the inlet channel 3 and an outlet channel 19, and above the circulation tank 7.

So Katie, the spray from such spray nozzles 6, is higher on the upstream side of the inlet channel 3. Then, thanks to a stepped increase in the direction of the gas flow cross-sectional area of the inlet channel 3, perpendicular to the gas stream, for example, by performing a bottom surface of the inlet port 3 in the form of an inclined surface or slope, it is possible to equalize the density of the sprayed absorbing liquid in the direction of the gas flow inside the channel 3, to provide the same through the process of desulfurization of exhaust gas 1 in each of the areas of the channel.

As the flow rate of the gas flow in the inlet channel 3 is higher, the efficiency of absorption of SOxin the exhaust 1 will increase to a greater extent. Therefore, to increase the flow rate of the gas flow in the inlet channel 3, it will be necessary to reduce the cross-sectional area of the intake channel 3, but if gas goes to the exhaust channel 19, while maintaining the flow rate at a high level, there will be a higher burden for the collection of fog in demister 16.

As shown in Fig. 4, the cross-sectional area perpendicular to the gas flow on the bottom stream of the history of the gas stream, passing between the inlet channel 3 and an outlet channel 19 and above the circulation tank 7, thereby reducing the flow rate of the gas stream so that the fogs are captured in the gas stream and subjected to scattering, not going to demister 16, as they are susceptible to free fall.

When the bottom surface of the intake channel 3 made in the form of an inclined surface, the spray nozzle 6 the lowest flux level in each of the spray pipes 4 that are installed on the many steps in the inlet channel 3 in the direction of gas flow, are essentially in the same horizontal plane, thereby providing the spray nozzles 6 predefined protection from immersion in the sprayed absorbing liquid flowing along the bottom surface of the intake channel 3.

In horizontal wet installation for desulfurization according to the present invention, the cross-sectional area of the inlet port 3 is less than the sectional area of the outlet channel 19. For this reason, the flow rate of the gas flow in the inlet channel 3 is more flow in the outlet channel 19 due to the difference in the sectional area of the inlet and outlet channels 3 and 19, so that rochesterian.

Even in the case of a construction in which the cross-sectional area gradually speed increases in the direction of gas flow from the inlet port 3 and outlet channel 19 inside the absorber tower 2, it will take place. In this case it would be advisable that the ratio of the sectional area perpendicular to the gas flow lowest flow area of the inlet port 3 of the absorber tower 2, the square cross section perpendicular to the gas flow path of the gas stream above the level of the liquid in the circulation tank 7, would be 100: (120 - 200).

Experimental example

To confirm the effectiveness of the experimental sample test was performed to assess the effect provided by the gas flow discharge on the amount of dissipation of fog using the reference installation with a flow rate of gas (reduced to standard conditions) 3000 m3/H. the Results of this experiment are given below. The flow rate of the gas stream is specified for the high flow area of the intake tower absorber, i.e. the maximum flow rate.

(a) Conditions

The velocity of the gas flow: 5 - 20 l/s

The ratio of liquid - gas (converted to n of the liquid used is water.

(b) Results

The results are shown in Fig. 7 and 8. In Fig. 7 shows a curve illustrating the characteristic curve of fog, in which the ordinate axis deferred amount of mist at the inlet of demister 16, and on the x-axis is the velocity of the gas flow; Fig. 8 shows a curve illustrating the characteristic curve of fog, in which the ordinate axis deferred amount of fog on the issue of demister 16, and on the x-axis is the velocity of the gas stream. With increasing gas flow rate increases the amount of fog dissipated at the inlet of demister 16, and at the same time the amount of fog on the issue of demister 16 also increases. This indicates that to reduce the concentration of mist in the purified gas discharged from the system, and to improve the efficiency of removing fog, consider reducing the speed of the gas flow inside the exhaust channel 19 upstream relative to demister 16.

On a slope bottom surface of the exhaust channel 19 in the plant for desulfurization of this variant embodiment can be installed a lot to prevent re-dispersion of fog plates 26, as shown in perspective in Fig. 9. Preventing povtorot outlet channel 19, from re-dispersion by means of exhaust gas flow, thereby preventing its re-dispersion upstream relative to demister 16, thereby slowing the growth in the number of stray mist flowing in demister 16.

It should also be noted that prevents re-dispersion of the mist plate 26 can also be used in other variants of the embodiment of the present invention.

The third variant embodiment of the

Installation of a wet-type flue gas desulfurization of this variant embodiment is shown in top view Fig. 10 and the side view of Fig. 11.

In the first variant embodiment shown in Fig. 1, the spray pipes 4 are disposed horizontally and extend from one side murine surface of the inlet channels 3 to the opposite murine surface. For this reason, the area of the base of the spray pipe 4 has a greater resistance to the flow of exhaust gas, while the end of the spray pipe 4 has less resistance to the flow of exhaust gas. Thus, there is a disadvantage in that the gas flow in the inlet channel 3 is rejected on the target area spray Troia. In addition, the spray pipe 4 is fixed only on their patches on murine surface of the inlet port 3, and therefore the target area of each spray pipe 4 is in limbo, which leads to an unstable position of the pipe 4. Moreover, since the spray nozzle 6 is placed in the same horizontal plane of the pipe 4, another drawback is that when you stop spraying the absorbing liquid may remain part of the spray liquid in the spray pipes 4 or spray nozzles 6, so that the solids (gypsum, limestone and/or similar product) in the absorbing liquid may be deposited and accumulate in them, thereby causing clogging of the spray pipes 4 or spray nozzles 6. Hence, the present variant embodiment aims to improve the variant embodiment shown in Fig. 1.

As shown in Fig. 10 and 11, tower 2 absorber designed to determine the flow of exhaust gas in a direction which is not vertical, includes a spray pipe 4, with the spray nozzle 6 mounted on them for spraying the absorbing liquid in napravlenii in multiple rows within the inlet channel 3 and secured at the opposite ends on the side walls of the intake channel 3. The spray pipe 4 is placed at one step or many steps in the direction of gas flow. The inner space of the inlet channel 3 shown in Fig. 12 (actually there is no front end wall of the object according to Fig. 12), when viewed in the direction of gas flow. As shown in Fig. 12, a variety of spray pipes 4 are placed between the opposite side walls of the inlet channel 3 and connected to the Central section in the intake channel 3. Absorbing liquid may be filed in the same amount from the opposite side walls of the inlet port 3 to the spray pipes 4, wherein the diameter of each spray pipe 4 gradually decreases from the side murine section to the Central section of the inlet channel 3, so that in case, even if the flow rate of the absorbing fluid within the spray pipe 4 is reduced toward the Central region, the speed of the flow inside the spray pipes 4 remains constant at any place.

The spray nozzles 6 are located on the lower side of the spray pipes 4, and therefore, in the event of termination of spraying the absorbing liquid remaining inside the pipe 4, the sludge can be wyob due to solid particles in the absorbing liquid, which are deposited and accumulate in the spray pipes 4.

Experimental example

To confirm the effectiveness of this alternative embodiment, tests were carried out using a wet-type desulfurization shown in Fig. 1 and Fig. 10 and 11. Test conditions are as follows:

The gas flow rate (reduced to standard conditions): 3000 m3/h

The size of the intake tower absorber: length 350mm x width 350 mm

The concentration of SO2: 2000 ppm million

The ratio of liquid - gas (reduced to standard conditions): 20 l/m3< / BR>
Excessive percentage of limestone: 10%

The results of the test

The percentage desulfurization

The installation shown in Fig. 1: 80%

The installation shown in Fig. 10 and 11: 82%

The velocity profile of the gas flow in the inlet channel 3 shown in Fig. 13 (corresponding to the installation according to Fig. 1) and in Fig. 14 (corresponding to the units shown in Fig. 10 and 11).

If the velocity profile of the gas flow in the inlet channel 3 compare the magnitude of deviation (%) relative to the average velocity of the gas stream, you can see that the velocity of the gas stream is reduced in the region of the side wall section of the base of esbriet due to the fact, that, essentially, changing the cross-sectional area of the intake channel 3, as the spray pipes 4 in the installation shown in Fig. 1, the narrowing section of the grounds to end them. On the other hand, in the installation shown in Fig. 10 and 11, due to the reduced diameter of the Central section of the spray pipes 4 speed gas flow increases it, but if you compare with the installation according to Fig. 1, the change in velocity of the gas stream decreases. For this reason, it was confirmed that in this embodiment, the embodiment of the gas-liquid contact in the inlet channel 3 is more uniform in comparison with the contact in the first variant embodiment, and leads to relatively more efficient characterization of the desulfurization.

After cessation of spraying the absorbing liquid were examined by the spray pipes 4. In the result, it was found the absence of the absorbing liquid in each of the spray pipes 4, although it was observed clogging of the spray pipes 4 and the spray nozzles 6 solid particles.

To increase the growth velocity of the gas stream in the Central part of the spray pipes 4 installation according to Fig. 10 and 11, the spray pipe 4 shown in Fig.carried out instead of the spray pipes 4, it is shown in Fig. 12. Fig. 15 is a view of the spray pipes 4, when viewed in the direction of gas flow in the inlet channel 3 (in fact, there is no front end wall of the object according to Fig. 15). In order to maintain the strength of the spray pipes 4, establish a support 27 in the Central section of reduced diameter of the spray pipes 4. Thus, the thickness of the spray pipes, essentially, is homogeneous in the horizontal direction and the gas flow in the inlet channel 3 is not disturbed, thereby providing the possibility of aligning the gas flow rate in the intake channel 3.

Way to improve the efficiency of spraying the slurry from the spray nozzles 6 spray pipe 4 within the intake channel 3, placed horizontally, is the direction of slurry sprayed from the spray nozzles 6 nearby side murine surface of the intake channel 3, in a downward direction relative to the path of gas flow in the inlet channel 3, the opposite direction from the side murine surface. In this case, the spray droplets are not able to encounter on the side murine surface and, thus, prevents their recurrence">

The fourth variant embodiment of the

In a vertical installation for desulfurization mist falls vertically inside the tower absorber and is captured in the gas stream, so the number of scattered fog is relatively minor. Horizontal installation for desulfurization, on the contrary, the droplets of slurry sprayed from the spray pipes are captured in the gas stream, and therefore prone to dispersion in the subsequent flow of demister. If you increase the amount of liquid dispersed in demister, it is difficult to handle such a conventional liquid demisters. This requires a means to prevent the passage of stray mist through demister, such as several Dimitrov or increase the distance between the last stage of the spray nozzle and demisters so that scattered the fog was not able dissipation in demister. When there is added demister, and if you increase the amount of dissipation in demister fog, may be due to wear of demister, and therefore may require a wear-resistant material installed in it, which results to an increase in the weight of demister. The increase in weight of demister requires simplified shall receive, in the result, leading to a rise in the cost of installation, which is undesirable. For this reason it is important to prevent dispersion in the next demister a large number of mist, spray tower absorber.

Hence it will be important to reduce the amount of dissipation of fog installing additional demister, and by modifying the design of the tower absorber or manner of dispersion of the slurry. This variant embodiment is directed to such modification. One plant for desulfurization according to this variant embodiment shown in Fig. 17, in which parts or components having the same functions as part of or installation components for desulfurization according to Fig. 1, are denoted by the same reference position as in Fig. 1, and description of them is omitted.

Droplets that are small relative to the size of the droplets of the absorbing liquid sprayed from the nozzles 6, and finely divided droplets of small size, existing among them, are captured in the exhaust gas 1 and displayed by demisters 16. However, if you increase the velocity of the gas stream in the absorber tower 2, the fogs are more often captured in the gas stream and dispersed in demister 16, financial p is openag, is re-dispersion of fog, wetting the outlet channel 19 and cause corrosion murine surface of the outlet channel 19. So it establishes inclined plate 28 on the ceiling area of the circulation tank 7 or ceiling area of the exhaust channel 19 to reject gas stream in a downward direction at a predetermined angle relative to the horizontal direction.

If the direction of gas flow introduced from the nozzles 4b of the lowest degree in the intake channel 3, is changed from a horizontal direction vertical to the circulation tank 7 by means of deflecting in the direction down the inclined plate 28 thus, it can be significantly reduced dissipation of fog, rejected from the gas stream, which could reach demister 16. The installation angle of the inclined plate 28 by an amount greater angle of inclination of the bottom surface of the intake channel 3 adjacent to the circulation tank 7 with respect to the horizontal direction of the gas flow is subjected to rotation in a downward direction, resulting in a reduced number of mist reaching demister 16. However, if there is a fear of sticking plaster the ptx2">

Even the design of the absorber tower 2, shown in Fig. 17, in which the sizes of demister 16 is less than the tower absorber without the inclined plate 28, the load for the collection of fog in demister 16 can be reduced, and the pressure cannot be increased, so that the desulfurization efficiency can also be reduced.

In Fig. 18 shows a variant embodiment in which the reflective baffle 30 is installed in the suspended ceiling on the area of the exhaust channel 19 at the top of the thread relative to demister 16 or ceiling area of the circulation tank 7. In this case, the gas flow is turned in the downward direction inside the tower 2 of the absorber above the circulation tank 7 so that the entrained mist deviate from the gas stream and discharged to the surface of the absorbing liquid in the circulation tank 7.

In this construction requires that the vertical sectional area of the path of gas flow over the surface of the absorbing liquid in the lower end of the inclined plate 28 or reflective baffle 30 was more than, at least, the vertical sectional area of the inlet port 3 to provide less resistance to gas pot is ASS="ptx2">

If an insert, for example an inclined plate 28 or reflective baffle 30 is installed on the ceiling area of the circulation tank 7 or ceiling area with the outlet 19 of the above-mentioned way, the droplets of the sprayed absorbing liquid will not collide on the insert, and therefore it will be possible to reduce the amount of dissipation of fog reaching demister 16. In this case there is no need to reduce the speed of gas flow in the inlet channel 3, and therefore, there is no reason to assume a decrease in the efficiency of desulfurization.

The embodiment variant of the invention shown in Fig. 19 and 20 (Fig. 20 is a cross - section along the line a - a of Fig. 19), requires a set of plates 31, which is a collision, each of which has a U-shaped cross-section, which are placed in a vertical zig-zag manner across the path of the gas stream at the top of the thread relative to demister 16. In this variant embodiment the absorbing liquid containing gas SOxabsorbed it in the intake channel 3, appears in the circulation tank 7, and the oxidizing air is uniformly dispersed in absorbing fluid through the blades 32 propeller stirrer nutricate the circulation tank 7.

Scattered and captured in the gas stream fogs displays placed upstream relative to demister 16 U-shaped plates 31, which is a collision. Since the U-shaped plate 31, on which there is a collision, placed on two or more levels in a zigzag manner, you are most fogs, captured in the gas stream. In addition, since the U-shaped plate 31 is placed in a zigzag manner, significantly reduced pressure loss, and excreted 90% or more scattered mists. To prevent drying out and sticking absorbing fluid deposited on the U-shaped plates 31 may be provided by the equipment (not shown) for supplying washing water to the plates 31, which is a collision.

If the spray pipe 4 is installed horizontally, as has been described, the direction of the absorbing liquid, spray the spray nozzles 6a on the side of the murine surface of the intake channel 3, will rotate inside of the intake channel 3, as shown in Fig. 20, so that the absorbing liquid collides with the side wall and thereby preventing the formation of mists dissipated.

In Fig. 21 shows an example setup for desulfurization in which the spray nozzles 6 are placed in the inlet channel so that the direction of spray them absorbing fluid turns down for a horizontal line in such a way that R is C. The spray nozzle 6 at the upper levels, preferably, be placed so that the direction of spray them slurry turns down for a horizontal line, and the spray nozzle at the lower level are placed so that the direction of spray them slurry is rotated on a horizontal or slightly elevated upward direction. Such installation direction of the slurry, spray the spray nozzles 6, makes it possible to reduce the number of mists dissipated in demister 16 without changing the characteristics of desulfurization.

In Fig. 22 shows an example setup for desulfurization in which the spray nozzles 6 are located on two levels in a direction parallel to the gas stream and at two levels in the direction toward the gas flow. Drops of slurry sprayed from the spray nozzles 6 are captured in the gas flow and dissipate to the next demister 16, but most of these fogs is reset under the action of gravity, before it reaches demister 16. If the exhaust gas 1 is introduced horizontal flow in the absorber tower 2, the fog is discharged in a downward direction only upstream relative to demist the mists, reaching demister 16, have the opportunity to deal with the lower section of demister 16. Therefore, when installing the inserts 36 type louvers on the lower section upstream relative to demister 16 is provided the opportunity to remove the dissipating fog wetting both surfaces and the rear side of the insert 36 type blinds fog. If the insert 36 of the type of blinds installed with turned down orientation angle in the range of 5 to 45 degrees relative to the horizontal direction, the trajectory passing through the insert 36 of the type of blinds is determined in the same direction as the locus of points of spray mists in the area that hosts the insert 36 type blinds, so there is a small pressure loss and it is necessary to wash the surface of the insert 36 type blinds wash water.

In Fig. 23 shows an example setup for desulfurization in which the tower absorber has a V-shaped side configuration. In the plant for desulfurization according to Fig. 23 the spray nozzle 6 is set parallel to the direction of inclination of the inlet channel 3 and in parallel with the gas-flow position. Alternatively, the spray nozzle 6 can be placed in CL 3, inclined downwards relative to the horizontal direction, while the sprayed absorbing liquid is fed in a downward direction, being under the influence of gravity. Above the circulation tank 7, the gas flow over the surface of the liquid in the circulation tank is changed upwards and therefore scattered the mists are rejected from the gas stream and discharged to the surface of the absorbing liquid in the circulation tank 7. Thus, significantly reduces the amount of dissipation of fog, captured in the gas stream to demister. It is advisable to set the angle of the V-shaped tower 2 absorber in the range of 10-50 degrees relative to the horizontal direction. The results of the experiment on the cold model shown in Fig. 24 (shows the relationship between the angle of inclination of the reactor, pending the abscissa axis, and the percent dissipation of fog that delayed the ordinate axis). If the angle is set to 10 degrees or more, the amount of dissipation of fog reaching demister 16, can be reduced to 1/4 on the number, when the angle is equal to zero. If the angle is set to 40 degrees, the number of receiveevent zero. It is therefore advisable to set the angle at the maximum possible value. However, if the tilt angle is set to a greater value, it increases the height of the inlet channel 3, which results in increased production cost of the absorber tower 2. Hence, it is necessary to set the angle on perhaps a smaller amount. Fig. 24 illustrates the results of an experiment conducted in counter-current mode of spraying with the speed of the gas flow of 12 m/s, the system includes a tower 2 absorber cross-section (950 x 950 mm) and 2-inch hollow-type conical nozzles.

As described above, in the horizontal installation for desulfurization number of fogs in demister 16 can be reduced without reducing the efficiency of desulfurization.

Fig. 25 illustrates the results of the analysis of the simulation, when the fog was sprayed in a horizontal installation for desulfurization for generating stations with a capacity of 350 MW. Fog occupies a small volume and Fig. 25 illustrates the modes of mists having a diameter of 1.5 mm, which were obtained using hollow cone type spray nozzles 6 with the angle of spray 90 BR>
Curve a: 6 m/C. Curve b; 8 m/s Curve: 12 m/s

Counterflow spray

Curve d: 6 m/s Curve e: 8 m/s Curve f: 12 m/s

From these results we can see that in the case of increasing the gas flow rate of 6 m/s to 12 m/s the amount of dissipation in demister 16 fogs increases, in particular, in the case of countercurrent spray. If the velocity of the gas flow increases so that plant for desulfurization can be more compact, but it increases the amount of dissipation of fogs, and therefore increases the load fogs on demister 16. For this reason, if not adopted the above method, then the setting for the product is not produced.

Fig. 26 illustrates the test results for this variant embodiment, performed on the cold model at a scale of 1:5. Fig. 26 illustrates a comparative analysis between the rate of dissipation of fog (in percent) under the terms of the velocities of gas flow 6 m/s and 12 m/s the test Results in Fig. 26 based on the condition that there is no insert in the channel, which is present in the example embodiment shown in Fig. 17. If the velocity of the gas flow is increased to 12 m/s, the velocity dispersion of the ri condition 6 m/s, but if you use the unit for desulfurization according to the present variant embodiment (Fig. 17 to 19 and 22, 23), the velocity dispersion of fog, in particular, even if the growth rate of a gas stream essentially remains equal to the velocity dispersion assuming 6 m/s Is sufficiently explains the appropriateness of even two-step-shaped demisters 16 of the prior art.

The fifth variant embodiment of the

The technology of the prior art shown in Fig. 63, requires solving the following problems:

(1) In the absorbing liquid is contained in a large amount of calcium carbonate (limestone), able to absorb SO2but also plaster, do not contribute to the absorption of SO2. However, if you increase the proportion of limestone in the absorbing fluid to increase the efficiency of desulfurization, the quality of the gypsum will be reduced and as a result, the plaster will be unusable.

(2) Oxidizing air is supplied in large quantities (more power required for air supply pump or drive mixers for mixing air).

(3) Large power required for grinding limestone.

This option is provided in Fig. 63. Horizontal installation for desulfurization schematically shown in Fig. 27. As in the method shown in Fig. 1, horizontal installation for desulfurization according to Fig. 27 consists of an inlet channel 3, the spray nozzles 6, the circulation tank 7, the mixing means 8, the pipe 10 for supplying air, demister 16 and the outlet channel 19. Installation according to this variant embodiment additionally includes a neutralizing device 38 to increase the pH value of the absorbing liquid, the pH value of which was reduced due to the absorption of SO2the exhaust gas 1, and the separator 39 to separate gypsum and limestone.

Absorbing liquid sprayed from the spray nozzles 6 in the intake channel 3 in the absorber tower 2, selectively absorbs SO2in the exhaust 1 for the formation of sulphurous acid, and is discharged into the circulation tank 7, where sulfurous acid is oxidized to sulfuric acid production. Containing sulfuric acid absorption liquid is fed through the pump 15 for pumping absorbing fluid in neutralizing device 38, where it neutralities limestone, and at the same time produces gypsum. Containing gypsum absorb dcost limestone recycled to the spray nozzles 6 for the selective absorption of SO2. Absorbing liquid containing higher amounts of gypsum is fed to the separator 40, where it is dehydrated and where gypsum is extracted. Limestone is fed to A neutralizing device 38.

Experimental example 1

Check desulfurization was carried out using the installation according to this variant embodiment. The concentration of SO2the exhaust gas 1 in the inlet channel 3 was 1,000 ppm million Limestone (having average particle diameter of 5 mm) in an amount corresponding to the same moles that and SO2the exhaust gas 1, and the amount of which was obtained presumably within 2 hours the reaction SOxin the exhaust was placed in the circulation tank to enable installation. Limestone in A quantitative ratio of 0.97:1 to the number of SO2the exhaust gas 1 in molar ratio) was fed from a pipe 42 for supplying limestone. The amount of air injected into the circulation tank 7, was 30 times larger than the number of SO2in the exhaust gas 1 in molar ratio.

Fig. 29 illustrates a curve showing the change in time (x-axis) percent desulfurization (y-axis). At the initial salsa in time. Was investigated the reason for such reduction, and in result, it was confirmed that the fall of the percent desulfurization was due to the layering of particles of gypsum on the surface of particles of limestone in neutralizing device 38, which has resulted in the decrease of reactivity of limestone. Therefore, the installation has been improved and brought up to the design shown in Fig. 28, in which the limestone in A neutralizing device 38 is mixed using mixers 43. In Fig. 29 shows the curve b shows the change in the percentage of desulfurization in time after improving the design. In this case, was not observed reduction percentage desulfurization, and for a long time was ensured high efficiency desulfurization. The concentration of SO2the exhaust gas 1 in the inlet channel 3 was changed from 100 to 5000 frequent. /million, but with any condition high efficiency desulfurization was achieved for a long time due to the use of agitators 43.

Experimental example 2

Characterization of the desulfurization studied under the same conditions as in experimental example 1, except that the amount in circulation in the area of the oxygen concentration dissolved by this time in the absorbing liquid in the separator 39 was measured using a meter 44 dissolved oxygen. Fig. 30 illustrates the relationship between dissolved oxygen concentration (x-axis) and the percentage of desulfurization (y-axis) at which the percent desulfurization decreases when the concentration of dissolved oxygen is equal to or less than 1 hour. / million Is presumably explained by the fact that in the case of a smaller quantity of air supplied to the circulation tank 7, H2SO3oxidized incompletely and remains in the liquid, and therefore slows down the reaction of absorption (H2O + SO2= H2SO3). Therefore, consider the measurement of dissolved oxygen concentration and control the amount of oxidation air so that the value of dissolved oxygen concentration was equal to or more than 1 part./million

Neutralizing device 38 in the above embodiment, the embodiment is intended for introduction into the reaction absorbing fluid with limestone A. Can be used in any design neutralizing device 38, if it prevents layering particles of gypsum on the surfaces of particles of limestone. In addition to using mixers 43, as described above, the way to prevent layering of particles of plaster on the licensing of gas near the surface of the limestone. Any means, for example, a wet cyclone type, capable of separating particles of gypsum and limestone particles, can be used as a separator 39. If the concentration of particles of limestone is low in absorbing fluid, or if the plaster is not taken into account, the separator 39 may be eliminated from the design. Neutralizing device 38 may be, moreover, are integrated into one unit with the separator 39 so that the device will function as neutralization and separation.

The present invention is applicable regardless of the direction of flow of exhaust gas and type of contact between the exhaust gas and the absorbing liquid in the absorber with wetted walls and so on).

In the plant for desulfurization, shown in Fig. 27, neutralizing device 38 is placed outside of the absorber tower 2, and filled with limestone A phase 46 may be formed in the lower section of the circulation tank 7. Fig. 31 illustrates the operation of this variant embodiment. Even in such construction it is preferable to output the particles of gypsum, Nastavenie on the surface of the limestone. If the bottom portion of the circulation tank 7 tx2">

Thus, according to this variant embodiment can be reduced the number of required air, due to the high rate of oxidation and the thickness of mixers 8 for fine separation of the oxidation air. In addition, in connection with the use of coarse limestone, there is no need to grind. The limestone, which has a large particle size (1 mm or more) can be easily separated from the particles of gypsum, having a size equal to 20 to 100 μm, so that the amount of limestone in neutralizing device 38 can be increased. This achieves high efficiency desulfurization, as well as high quality gypsum as limestone hardly mixed with particles of plaster.

The sixth variant embodiment of the invention

The sixth variant embodiment shown in Fig. 32. Droplets with smaller diameters in the absorbing liquid, spray and thin discharge from the spray nozzles 6, captured exhaust gas 1, but displays demisters 16a and demisters 16b mounted on the outlet port 19. At this time, as shown in Fig. 33, fogs, reaching demister 16a, collide with element 47 demister 16a and going in it, and then discharged in the form of liquid film 48 dematera 16a and passes through the output fog pipe 18 back to the circulation tank 7. Particles, including gypsum, found in scattered by the fog and gradually deposited on the surface of the element 47 demister 16a. Therefore, for washing off the particles deposited on the element 47 demister 16a, wash water collected in the tank 51 wash water, is fed into the pipe 52 wash water via a pump and sprayed in an intermittent mode of the nozzles 54 of the wash water in demister 16a. Washing element, located downstream of demister 16b, as the wash water is liquid, free from dust. This wash water is supplied from pipe 55 wash water through the spray wash water nozzles 56.

Containing particles of liquid, used as wash water is collected in the lower section of demister 16b and is supplied to the reservoir 51 wash water. The number of particles deposited on below to stream demister 16b, much less than the number above to stream demister 16a, and therefore, if the liquid to collect in the reservoir 51 wash water and use for washing located upstream of demister 16a, it will not be necessary to update the wash water for demister 16a, which provides a result of its effective application.

what s the diameter of the outlet channel 19. Demister 16a, furthermore, provided with a groove 50, and therefore dissipation fluid cannot pass between channel 19 and demisters 16a. Most of the dissipation of fog passes along the inner murine surface outlet channel 19, in order to achieve the above by the flow of demister 16a, and therefore to prevent the entrance of fog in demister 16a can be installed drain 59 before demisters 16a. Drain 59 has a structure in which an end section bent his direction of gas flow so that the liquid collected on this site gets a smooth flow towards the lower section of the outlet channel 19 without re-dispersion to the next area.

In Fig. 35 shows in detail the construction site of the shaped demisters 16a and 16b. As plums 59 posted before above the stream demisters 16a, as described above, scattered fog, after they have passed along the inner murine surface 19 to reach demister 16a, is collected in the bottom of the channel 19 through the drain 59. Adjacent to the container side inclined section 19a formed on the bottom surface of the exhaust channel 19, extending from the drain 59 to the circulation tank under the tower 2 absorber. Therefore, with the tsya in the circulation tank 7, and therefore cannot be re-scattered from the drain 59.

Adjacent to the side of demister inclined section 19b formed on the bottom surface of the channel 19 between the shaped demisters 16a and 16b, so that the drops collected on the inclined section 19b, have the opportunity to flow to the downstream of demister 16b. Moreover, the spray nozzle 62 for washing the bottom can be placed adjacent to the side of demister inclined section 19b, thereby ensuring that the mists and particles accumulated on the bottom of the channel 19, washed into intermittent or continuous mode to prevent sedimentation of them.

Fig. 36 illustrates a comparative analysis between the number of mists dissipated in the tower 102 vertical absorber (Fig. 63) of the prior art, and the number of mists dissipated in the tower 2 horizontal absorber in this variant embodiment. The rate of dissipation of the fog (the ratio of the number mists dissipated to the total amount of the sprayed absorbing liquid) pending on the axis of ordinates, while the velocity of the gas stream delayed by the x-axis. As this has been determined, the amount of dissipation of fog is determined by the number of fogs, receivei gas flow speed of 3 m/s in the tower 102 vertical absorber of the prior art to compare with dissipation quantities in tower 2 horizontal absorber according to the present variant embodiment, it appears that the amount of dissipation of fogs (point x in Fig. 36) in the tower 102 vertical absorber of the prior art has a very small value equal to 0.2, if we take the level of dispersion 1 (curve a), as shown in Fig. 36. Conversely, in the tower 2 horizontal absorber does not have a drain 59, number dissipation of fogs (curve b), with increasing gas flow rate, increases so that if the velocity of the gas flow rate of 6 m/s, it increases to about 4 times the level of this variant embodiments.

This is due to the fact that most of the dissipation of fog, captured in the gas stream hits on murine internal surface of the channel 19 to reach demister 16a. Conversely, in the present variant embodiment, even if increasing the rate of gas flow, most of the dissipation of fog, colliding on plums 59 murine internal surface of the outlet channel 19 to reach demister 16a, may be collected by the drain 59. Therefore, even if the growth rate of a gas stream, there is no boost load demister 16 and does not deteriorate the collection efficiency mist demister 16.

Ka is moznosti increase the number of scattered fog, load the shaped demisters 16a and 16b increases to a lesser extent, and therefore, the efficiency of the shaped demisters 16a and 16b is not reduced, so there is no need to re-set the device for gathering mists.

The seventh variant embodiment of the invention

Installation for desulphurization of this variant embodiment shown in Fig. 37. Bottom murine surface of the inlet port 3 of the absorber tower 2 is slightly tilted to the output of the absorbing liquid sprayed from the spray nozzles 6 in the intake channel 3. A significant part of the spray liquid sprayed from the spray nozzles 6, going on the set of vertical plates 63, is placed in the outlet channel 19 for the formation of a thin liquid film on the surface of each of the vertical plates 63, thereby absorbing and removing gas - sulfur dioxide, which could not be completely removed by the spray nozzles 6. Vertical plate 63 is placed parallel to the direction of gas flow, as shown in enlarged scale in Fig. 38. In order to prevent the formation of layers on the vertical plates, they can be washed with a pop-up water line 64, the output from the equipment 20 to extract gypsum, or doth 63, remove through the installed downstream of demister 16.

Can be used vertical plate 63 having corrugations, as shown in Fig. 39. In this case, when passing dissipated the mists corrugated section so they are deposited on a vertical plate 63 due to the inertial collision, and this leads to increased efficiency of removal dissipation of fog.

Experimental example

To confirm the effectiveness of this variant embodiment (using a vertical plate 63, as shown in Fig. 38), was tested using the control setup with the flow of exhaust gas 2,500 m3/h (reduced to standard conditions). The results are shown below (see table).

(1) Conditions

The flow rate of exhaust gas (reduced to standard conditions): 2500 m3/h

The concentration of SO2intake: 2000 ppm million

The ratio of liquid - gas (reduced to standard conditions): 15 l/m3< / BR>
The velocity of the gas flow in the tower: 5 - 12 m/s

It was confirmed by the results of the above tests that the density at the inlet of demister 16 may be f and efficiency of desulfurization can be took the 9.

The many vertical plates 63 downstream relative to the spray nozzles, thus, ensures that even in the case when the velocity of the gas stream in the absorber tower 2 increases to ensure the possibility of increasing the number of spray droplets, which are dispersed, dissipated the mist can be collected by means of vertical plates 63, and also ensures that the liquid film of the absorbing liquid can be formed on the surface of each vertical plate 63, causing the absorption of part of sulphurous acid gas, which cannot be fully bring in the intake channel 3, and thereby increase the efficiency of desulfurization.

The eighth variant embodiment of the invention

Installation for desulphurization of this variant embodiment shown in Fig. 40. The hallmark of this variant embodiment is a porous plate 69 mounted across the channel's profile on the exhaust side of the exhaust gas to the absorber tower 2, that is downstream relative to the circulation tank 7, and above the latter. It is advisable to install porous reflective wall 24 to prevent the dissipation of fog due to gas pot is servoir 7, as shown in Fig. 41 and 42.

The exhaust gas 1 is passed through the inlet channel 3 flows from the mists of the absorbing liquid contained therein, in the direction down the stream, but when he passes through the liquid film formed dissipating fog, colliding on a porous plate 69 at her then placed upstream relative to demister 16, then reached a specified percentage of desulfurization. I.e., the surface (boundary layer) of the sprayed droplets of the absorbing liquid contained in the exhaust 1 may have a low relative speed with respect to the exhaust gas 1 in some cases, so restoring the surface of the sprayed droplets does not occur; and because this surface has reached the saturation point SOxthe exhaust gas 1, it is less conducive to the efficiency of desulfurization, despite the fact that there is sufficient contact area between the spray pipes 4 and demisters 16. However, the placement creates resistance means, for example, a porous plate 69 between the spray pipes 4 and demisters 16 provides not only the impact of the dissipation of fog about creating resistance means and their accumulation, N. exhaust gas through the liquid film, formed on the porous plate 69 by means of the accumulated fog.

Creates resistance means is not limited to a porous plate 69, so can be used any which creates a resistance element, non-porous plate 69, if he is able to restore the surface of the sprayed droplets absorbing fluid; and in this case, you can expect a certain degree of desulfurization.

Porous plate 69 may be installed on the lowest portion of the flow relative to the inlet channel 3, as shown in Fig. 43. It is advisable to have a pore size of 10 mm or more porous plate 69, and the ratio of total area of the pores relative to the entire surface of the plate 69 (coefficient of voidness) is 20% or more, in order to control for absorbing liquid absorbing slurry and to reduce to the maximum possible value of the pressure loss. Can be used porous plate 69 with the same size and step time. But the size and step time can be adjustable in the height direction (in the direction perpendicular to the flow of exhaust gas), If there is a possibility of regulating the size and pitch then it would be appropriate to the size of the pores in the lower area of the porous plate 69 was the STI, as the loading of fog is more important at the low area of the porous plate 69. It would be advisable, in addition to the intake channel 3 had a design made in one piece with the circulation tank 7, in order to be able at least to a small extent to reduce the scattering in the direction downstream and to prolong the contact time of the exhaust gas, and to even sprayed absorbing liquid could be drained in a maximum possible number.

In the porous plate 69 may be provided a gap for drainage at the site, connecting with the bottom of the absorber tower 2 on its slope, located at an angle relative to the circulation tank 7.

In Fig. 44 shows curves between the velocity of the gas stream (delayed on the x-axis) at the inlet of the absorber tower 2 and the density of fog (delayed on the ordinate axis) in the inlet of demister 16, which were determined under the conditions of gas flow rate (reduced to standard conditions) is equal to 3000 m3/h and the concentration of SO2equal to 2000 ppm million Was found that the presence of a porous plate (curve a) the density of the fog in the intake of demister 16 is less than the density of the fog in the absence of pores which supports a significant effect.

Experimental example 1

An experiment was conducted on the treatment of exhaust gas using the unit for desulfurization wet type shown in Fig. 40. The test conditions and results are shown below.

The gas flow rate

(reduced to standard conditions): - 3000 m3/h

The concentration of SO2: - 2000 ppm million

Dust concentration

(reduced to normal conditions)

intake: 200 mg/m3< / BR>
The gas temperature at the inlet: - 150oC

The flow rate of oxidizing air

(reduced to normal conditions) - 30 m3/h

The number of steps of the spray pipes: - 3

The ratio of liquid - gas

(reduced to standard conditions): - 15 l/m3< / BR>
The size of the intake tower absorber: length 350mm x width 350 mm

Excessive percentage of limestone - 10%

Porous plate

pore size: 40 mm

the coefficient of voidness: - 50%

The results of the test

The percentage desulfurization: - 80%

The percentage of oxidation: - 99.7% of

Loss of pressure in the tower: - 100 mm H2O

The density of the fog on the issue

(reduced to standard conditions): 100 mg/m3< / BR>
Experimental example 2

The experiment treatments the Oia test and the results are shown below.

The gas flow rate

(reduced to standard conditions): - 3000 m3/h

The concentration of SO2: - 2000 ppm million

The dust concentration on the release

(reduced to standard conditions): 200 mg/cm3< / BR>
The temperature of the gas in the production of: - 150oC

The flow rate of oxidizing air

(reduced to standard conditions): - 30 m3/h

The number of steps of the spray pipes: - 3

The ratio of liquid - gas

(reduced to standard conditions): - 15 l/m3< / BR>
The size of the intake tower absorber: length 350mm x width 350 mm

Excessive percentage of limestone: - 10%

Porous plate

pore size: 40 mm

the coefficient of voidness: - 50%

The results of the test

The percentage desulfurization: - 83%

The percentage of oxidation: - 99.7% of

Loss of pressure in the tower: - 115 mm H2O

The density of the fog on the issue

(reduced to standard conditions): - 95 mg/m

Experimental example 3

The experiment on the processing of exhaust gas was carried out using the installation method shown in Fig. 40, but we used the intake channel 3 (see Fig. 41), allowing all of the sprayed absorbing liquid to rotate in the direction of computers is tion to normal conditions): - 3000 m3/h

The concentration of SO2: - 2000 ppm million

The dust concentration at the inlet

(reduced to standard conditions): 200 mg/m3< / BR>
The gas temperature at the inlet: - 150oC

The flow rate of oxidizing air

(reduced to standard conditions): - 30 m3/h

The number of steps of the spray pipes: - 3

The ratio of liquid - gas

(reduced to standard conditions): - 20 l/m3< / BR>
The size of the intake tower absorber: length 350mm x width 350 mm

Excessive percentage of limestone: - 10%

Porous plate

pore size: 40 mm

the coefficient of voidness: - 50%

The results of the test

The percentage desulfurization: - 80%

The percentage of oxidation: - 99.7% of

Loss of pressure in the tower: - 55 mm H2O

The density of the fog on the issue

(reduced to standard conditions): 150 mg/m3< / BR>
Comparative experimental example 1

The experiment on the processing of exhaust gas was carried out essentially in the same way as example 1, except that was charged porous plate 69, which is installed between the inlet channel 3 and demisters 16 in experimental example 1. The test results below.

The results espio

The density of the fog on the issue

(reduced to standard conditions): 150 mg/m

After working for 100 hours was examined by the internal region, and as a result have seen a significant deterioration in the element of demister 16.

In this embodiment, the embodiment achieves an equivalent effect even in the case when all the spray nozzle 6 sprinkle absorbent liquid in the flow parallel to the flow of exhaust gas, as shown in the above experimental example 3. In this case, however, the load of fog is very high and it is advisable to place the porous plate 69 downstream relative to the circulation tank 7 and upstream relative to demister 16. It should be noted that when demister 16 removes the spray droplets, which have a typical particle size (not very big and not very small, and as the droplets used in the installation DeSOx), the maximum flow rate may be approximately 7-8 m/s, and therefore in some cases the size of the outlet channel 19, including demister 16 may be larger than the inlet port 3, placed upstream relative to the circulation tank 7.

In atomt 69 horizontally (i.e., in a direction parallel to the flow of exhaust gas, as shown in Fig. 42) on many levels. And this is due to the fact that dissipated the mists flow direction downstream, while dropping down when, therefore, they can be collected even porous plates 69 for forming the liquid film and thus be subjected to desulfurization.

This variant embodiment has been described as a structure in which the absorber tower 2 and the circulation tank 7 is made in one piece with each other, but even in the structure in which the absorber tower 2 and the circulation tank 7 are separated from each other and mutually connected by a drain pipe, as shown in Fig. 45 can be achieved a similar result.

Thus, according to the variant embodiment the height of the tower 2 absorber lower, but nevertheless can be achieved with high efficiency desulfurization and decrease the amount of fog on the issue, resulting in the reduction of the complexity of the design and effectiveness of it.

The ninth variant embodiment of the invention

Installation of a wet-type exhaust gas desulfurization by this variant embodiment is setup shows a cross-section on a vertical plane (see the cross-section along the line A - A of Fig. 4) the inlet channel 3 and the circulation tank 7; and Fig. 47 shows a cross-section along the line A - A of Fig. 46.

In the variant embodiment shown in Fig. 46, the spray nozzle 6 is placed directly on two opposite murine surfaces and on the surface of the ceiling wall inlet channel 3. The spray pipe 4 and the pipe 12 for circulating fluid mounted outside the inlet channel 3 and connected to the spray nozzles 6. The absorbing liquid supplied from the circulation tank 7 through the pipe to the spray nozzles 6 with the circulating pump 11. It should be noted that there may be excluded from the structure mounted on the surface of the ceiling wall of the spray nozzle 6 and the spray pipes 4.

The absorber tower 2 in this variant embodiment has a construction in which the spray pipe 4 and a support for the spray pipes 4 are not placed inside the inlet channel 3, and therefore eliminates the possibility of collisions drops absorbing fluid with such insertions, which may result in the termination of the reaction the absorption of gas SOx. Thus, in this variant embodiment drops absorbing the liquids is as desulfurization, in the installation according to Fig. 4, may decrease the sprayed absorbing liquid.

In addition, the absorber tower 2 of this variant embodiment of the circulation pump 11 is set for each group of spray pipes 4 on the side walls and the ceiling wall inlet channel 3. Therefore, the amount of the sprayed absorbing liquid may be changed on a particular side wall or concrete ceiling area depending on the type of flow or content SOxexhaust gas.

It should be noted that in all variants of the embodiment of the present invention, the amount of the absorbing liquid sprayed from the spray nozzles 6, is regulated by the regulator of the number of sprays of liquid (not shown) installed in the spray pipes 4.

In Fig. 46 shows the absorber tower 2 having a square contour in vertical section, but it can be rounded. In addition, in Fig. 46 and 47 of the spray pipes 4 and the spray nozzle 6 were placed horizontally, but such placement is not required, so that they can be placed vertically on the side wall of the intake channel 3.

If rasbridge the high quality material, for example, stainless steel pipe 4 to prevent corrosion, since the liquid of the slurry is in a strong acid environment. In this variant embodiment, however, not necessary to use such high-quality material, because the spray pipes 4 and similar elements are placed outside the tower absorber.

In this variant embodiment, if it is supposed to get the same efficiency of desulfurization as in the installation of Fig. 4, can be reduced the number of sprays of liquid, which results in a reduction of operating costs. In addition, since there is no insert inside the plant for desulfurization, can be reduced costs for its manufacture.

The tenth variant embodiment of the invention

This option is shown in Fig. 48. In this variant embodiment the spray nozzle 71 for removing mist spray of a fluid-absorbing installed on the ceiling area of the circulation tank 7 (i.e. the ceiling area of the absorber tower 2). This option is intended for gathering mists dissipated in the exhaust to reduce the burden of demister 16 to the collection of fog through successful primenenie nozzle 71 without using insert, for example, a porous plate 69 mounted in the outlet channel 19 installation according to Fig. 40. Part of the absorbing liquid supplied from the circulating pump 11, is sprayed from the spray nozzle 71 for removing mist towards the surface of the absorbing fluid within the circulation tank 7. Therefore, introduced through the inlet port 3 exhaust gas 1 moves along the perpendicular path through this group to the spray droplets. At this time, the exhaust gas flows from the fog that moves to the liquid surface in the circulation tank 7, but he is forced to pass in the forward direction due to inertial forces, since dissipated the mist contained in the exhaust gas 1, have a greater specific gravity than the specific weight of the gas. Thus, dissipated the mists collide on a foggy, moving towards the surface of the liquid in the circulation tank 7, and thereby accumulate.

The efficiency of this variant embodiment shown in Fig. 50. It is evident from Fig. 50 you can see that the rate of dissipation of fogs (the ratio of dissipation of fog, based on the total amount of the sprayed absorbing liquid) in the inlet demist the relative velocity dispersion in the second variant embodiment (see Fig. 4) using one-step demister that is missing above the flood demister 16a (Fig. 51), thereby ensuring the effectiveness of essentially equal efficiency when installed above the flood demister 16a (Fig. 51).

Absorbing liquid sprayed from the spray nozzle 71 for removing fog, also absorbs SO2the exhaust gas 1, and so the above function can be sufficiently achieved by removal of the absorbing liquid supplied to the spray nozzles 6, without increasing the number of the absorbing liquid recirculated by means of the circulation pump 11. Thus, no may increase energy costs for circulation pumps 11.

In the variant embodiment shown in Fig. 49, partition 72 is installed on the ceiling of the circulation tank 7 so that a part of the flow of exhaust gas flowing between the ceiling of the circulation tank 7 and the liquid surface, as shown in Fig. 48 is blocked, resulting exhaust gas flows near the surface of the liquid. The spray nozzle 71 for removing fog sets is m ore than the forced flow of the exhaust gas near the surface of the liquid, than in the variant shown in Fig. 48, the fogs have the opportunity to impact on the surface of the liquid circulation tank 7 or the bottom wall of the tower, using the inertial force of mists. In the variant embodiment shown in Fig. 49, the velocity of the gas flow increases as the exhaust gas passage 1 through the group drops sprayed from the spray nozzle 71 for removing fog, when compared with the velocity of gas flow in the variant embodiment according to Fig. 48, and hence also increases the force of inertia of mist in the exhaust 1, resulting in improved efficiency of removing mists dissipated in the exhaust. In the variant embodiment shown in Fig. 52, the ceiling of the circulation tank 7 is reduced in the setup partitions 72, shown in the variant embodiment according to Fig. 49, so that part of the ceiling is approaching the surface of the liquid in the circulation tank 7, and the spray nozzle 71 for removing mist is installed on the ceiling area closer to the surface of the liquid. Thus, there is a possibility, as in the variant embodiment according to Fig. 49, to increase the efficiency of removing mists dissipated in the exhaust 1.

In accordance with the Otok relative demister 16, and there are ways to reduce the cost of the equipment, reduce the pressure loss inside the tower 2 of the absorber and to reduce power consumption for fan desulfurization. Due to this, it is possible to provide a compact absorber tower 2 by increasing the gas flow rate.

Eleventh variant embodiment of the invention

Installation for desulphurization of this variant embodiment is a horizontal installation type, as shown in Fig. 3 and 4, but the hallmark is in the intake channel 3. Schematic view of the cross section along the vertical plane (see section along the line A-A of Fig. 4) the inlet channel 3 and the circulation tank 7 shown in Fig. 53, and a schematic view of a cross section along the line A-A in Fig. 53 shown in Fig. 54, in which parts or components that perform the same functions as the parts of the absorber tower 2, shown in Fig. 3 and 4, are denoted by the same reference position as in Fig. 3 and 4, and therefore their description is omitted here.

As shown in Fig. 53 and 54, the spray nozzle 6 is installed on the many steps on the opposite side walls of the intake channel 3, which has a square tubular shape (or which mitunga channel 3. Thus, there is no danger of corrosion of external surfaces of the spray pipes 4 and does not require the poles to the spray pipes 4 and the spray nozzles 6. Valves for the spray nozzles 6 moreover can be made outside of the absorber tower 2, and therefore there is no danger of corrosion, which allows the use of inexpensive material. Moreover, here there is no boost pressure losses flow to the spray drops because of such inserts as valves for the spray nozzles 6.

However, if you only install the spray nozzle 6 on the side walls of the inlet port 3, the locus of the droplets of the sprayed slurry is distributed over the cone from the spray nozzle 6, which is the apex of the cone, and for this reason, the area in which no spray droplets absorbing fluid, is formed between the spray nozzles 6 close the latter. Thus, part of the gas in the inlet channel 3 does not come into contact with the absorbing liquid, and is blown through the tower 2 absorber, which reduces the efficiency of desulfurization of exhaust gas in General. Therefore, as shown in Fig. 53 and 54, are installed to prevent the release of ha is the lateral walls of the intake channel 3, thereby preventing from release through the gap between the propagating along the cone of the spray droplets and the inner surface of the side wall of the intake channel 3. Preventing gas release plate 73 is installed to rotate in the direction of the droplets sprayed from the spray nozzles 6. Since moreover the width of preventing gas release plates 73 in the direction of the spray droplets absorbing fluid is limited within the area in which not a drop razbrasivayutsya, spray droplets may not be detained.

A variant of the embodiment shown in Fig. 55, is a modification of the variant according to Fig. 53 but the difference from the embodiment according to Fig. 53 is a configuration prevents the release of gas plates 73. The latter (plate 73) is mounted on a set of stairs on the side walls of the intake channel 3 between the levels of the spray nozzles 6 and extends along the angle formed by the geometric place of the droplets sprayed from the spray nozzles 6. In this case, the width of preventing gas release plates 73 in the direction of the spray droplets is limited to the area outside the location of the spray droplets, and therefore it protects the OTP is Fig. 55.

One modification to the variant embodiment according to Fig. 53 shown in Fig. 56. In this modification, the spray nozzle 6 is set at the same height as multi-preventing gas release plate 73 mounted on the side walls of the inlet port 73 so that their terminal part facing directly to the inner sides of preventing gas release plates 73 (that is, the end part of the spray nozzles are installed flush with the inner side plates 73), thereby preventing the emission of exhaust gas 1.

Another alternative embodiment based on the same constructive approach shown in Fig. 57. In this alternative embodiment, the sections of the side wall of the intake channel 3 is bent towards the inside for the in-depth education in the vertical plane of the grooves. The spray nozzles 6 are mounted on the lower slopes of the grooves these grooves, respectively, as shown in Fig. 57, thereby providing the possibility of absorbing liquid to spray in a stream parallel to the gas flow. Moreover, the spray nozzle 6 downstream as the spray nozzle upstream can be ustalosti spraying the absorbing liquid in countercurrent to the gas stream. If the spray nozzle is installed on the same stage, the area in which no spray droplets is created between the spray nozzles 6 after spraying the absorbing liquid from these nozzles 6. However, with a spray nozzle at two or more stages and placing above and respectively below the flow of the spray nozzle in a vertical zig-zag order, you can exclude an area in which there are no spray drops.

Although preventing gas release plate 73 or recessed grooves are formed or defined in a vertical plane on the side walls of the inlet port 3 through the above-mentioned variants of the embodiment, it should be understood that these prevent the gas release means can be mounted on the horizontal section of the side walls of the inlet channel 3 or plot it tilted at a predefined angle relative to a vertical section. In this case, the absorbing liquid can be served from the same spray pipe 4 to the group of spray nozzles 6 in the horizontal direction or in a direction inclined at a predefined angle relative to the vertical direction.

Typically, the mixing of the circulation of the fluid inside the circulation tank 7 may be satisfied when using the mixers with the ability to mix approximately half the amount of liquid per minute) in the circulation tank 7. If the volume of the circulation tank 7 is large enough to uterino will mix using only the potential energy relief of the absorbing liquid from the inlet channel 3. In this case, you will need to install the mixer in the circulation tank 7, as provided in the installation of the prior art. Therefore, provided that the short residence time of the liquid in the circulation tank 7, there is a possibility that sufficient circulation of fluids even in the absence of agitators in the circulation tank 7.

In this variant embodiment can be excluded mixer for dispersion of the air supplied to the circulation tank 7, which, as a result, simplifies the design of the circulation tank 7 and reduces energy costs.

This may also be a reduced amount supplied to the circulation tank 7 air when feeding the oxidizing air through the bottom air tube 79 to the inclined part of the bottom of the intake channel 3, where the fluid moves turbulent, or if feeding the oxidizing air through the air pipe 80 in an empty part of the absorber tower 2, which is located above the absorbing liquid in the tank 7, a section close to the surface of the liquid in the circulation tank 7. The oxygen in the air supplied through the air pipe 79 of the bottom, dissolves and becomes dissolved killareny oxygen is used for oxidation of bisulphite calcium. The air supplied to the area near the surface of the liquid in the circulation tank 7, is introduced into a liquid and turns into bubbles 81, so that the flows on the oxidation reaction of bisulfite calcium. Therefore, it is possible to reduce the amount of air supplied through the pipe 10 supply air for pressurization of the oxidation air intended for the circulation tank 7, if fanne on the inclined part of the bottom of the intake channel 3, where the fluid is moving in the turbulent regime, or on land close to the surface of the liquid in the circulation tank 7.

In Fig. 59 shows the structure of the bottom, as a section along line A-A of Fig. 58. In this variant embodiment the cross-section in the horizontal plane of the circulation tank 7 is shown as a circle, but its shape is not exclusive and therefore can be, for example, rectangular. Absorbing liquid sprayed from the spray nozzles 6, after absorbing gas SO2reset to the inclined part of the bottom of the intake channel 3 tower 2 absorber; straightens up drain 75 placed in a location remote from the center of the absorber tower 2 in the direction towards the side wall, and is discharged into napravleniyami fluid 77 relief in the circulation tank 7, it is possible to circulate the liquid in the circulation tank 7 through a power discharged fluid 77. In addition, consider that the obtained particles of gypsum can not accumulate on the bottom of the circulation tank 7 by means of fluid circulation.

In Fig. 60 shows a view along line B - B of Fig. 58. Drain 75 placed on the inclined part of the bottom of the absorber tower 2, which is offset in a place remote from the center of the absorber tower 2 in the direction towards the side wall, and therefore reset the fluid 77 is discharged in the direction (see Fig. 59), tangentially to the circumference of the side wall of the circulation tank 7.

In Fig. 61 shows a variant embodiment of views along the line B - B of Fig. 58, in which the groove 76 is formed on the inclined part of the bottom of the absorber tower 2. In the variant embodiment according to Fig. 61 groove 76 is shifted in place, remote from the center of the bottom of the absorber tower 2 in the direction towards the side wall, and drain 75, shown in Fig. 60. In Fig. 62 shows a variant embodiment (similar view along the line B - B of Fig. 58), in which both drain 75 and the groove 76 formed on the bottom of the absorber tower 2.

As discussed above, application of the present invention makes it possible to eliminate from the design IU the functions of the circulation tank 7, and moreover to reduce energy costs. In addition, it is possible to reduce the number supplied to the circulation tank 7 air when feeding the oxidizing air to the inclined part of the bottom of the absorber tower 2, where the liquid flows in the turbulent regime, and/or a section close to the surface of the liquid circulation tank 7.

1. Installation of a wet-type flue gas desulfurization, which includes the tower absorber with gas flow path defined therein in a direction other than vertical, and comprising an inlet channel for input exhaust gas containing sulfur oxides, the area of spraying the absorbing liquid through the spray pipes to allow to come into contact with the gas outlet, with demister to remove dissipation of fogs, the circulation tank for accumulation of the absorbing liquid discharged from the tower absorber, and to oxidize the sulfur oxide absorbing liquid air during the accumulation of the absorbing liquid, and a circulation system for circulating accumulated absorbing fluid to the spray tower absorber, characterized in that the tower absorber made in one piece with the circulation re is she spraying the absorbing liquid from the spray pipes placed in the inlet channel, includes a bottom inclined portion which is inclined downwards in the direction to the circulation tank.

2. Installation under item 1, characterized in that the cross-sectional area of the inlet port perpendicular to the gas flow speed increases in the direction of gas flow, and the cross-sectional area of the low flow area of the inlet port perpendicular to the gas flow, a smaller square cross section perpendicular to the gas flow cross section of the path of gas flow between the inlet and outlet channels and above the circulation tank.

3. Installation under item 1, characterized in that all the spray pipe in the inlet channel fixed their opposite ends on the side walls of the inlet channel, passing in a horizontal direction across the path of gas flow in the inlet channel to enter the absorbing fluid through the opposite ends.

4. Installation under item 1, characterized in that it further includes means to deflect the gas stream to provide turning down the gas flowing from the inlet port towards the outlet channel.

5. Installation under item 1, otlichayushiesya and neutralization of its limestone, particle size greater than the particle size of the gypsum obtained by neutralization of the absorbing fluid through limestone, and means for recycling the neutralized liquid to the spraying the absorbing liquid in the inlet channel.

6. Installation under item 1, characterized in that it includes means for dropping the absorbing liquid accumulated on the inclined part of the bottom of the entrance channel, in the circulation tank to circulate the liquid in the circulation tank under the action of the potential energy reset absorbing fluid.

7. Installation under item 1, characterized in that it includes means to supply air, oxidizing absorbing liquid into the absorption liquid accumulated on the inclined part of the bottom of the input channel, or to the area near the surface of the liquid in the circulation tank in which liquid is circulating rapidly.

8. Installation of a wet-type flue gas desulfurization, which includes the tower absorber with gas flow path defined therein in a direction other than vertical, and comprising an inlet channel for input exhaust gas containing sulfur oxides, zone razbryzgivaya, an exhaust channel having demister to remove spray mist, a circulation tank for accumulation of the absorbing liquid discharged from the tower absorber, and oxidation of the sulfur oxide absorbing liquid air during the accumulation of the absorbing liquid, and a circulation system for circulating accumulated absorbing fluid to the spray tower absorber, characterized in that the area of spraying the absorbing liquid of razmjena in the inlet channel and at least the highest flow level zone sprinkler in the inlet channel includes a spray nozzle for spraying the absorbing liquid in a direction parallel to the flow of exhaust gas, but at least the lowest flow of the spraying step includes spray nozzles for spraying the absorbing liquid in the direction opposite to the flow of exhaust gas.

9. Installation under item 8, characterized in that the cross-sectional area of the inlet port perpendicular to the gas flow speed increases in the direction of gas flow, and the cross-sectional area of the low flow area of the inlet port perpendicular to the gas flow, Magnitsky and outlet channels and above the circulation tank.

10. Installation under item 8, characterized in that all the spray pipe in the inlet channel pass in a horizontal direction across the path of gas flow to enter the absorbing fluid through the opposite ends.

11. Installation under item 8, characterized in that it further includes means to deflect the gas stream to provide turning down the gas flowing from the inlet channel to the outlet channel.

12. Installation under item 8, characterized in that it further includes means for absorbing fluid discharge from the circulating tank and neutralize its limestone particle size greater than the particle size of the gypsum obtained by neutralization of the absorbing liquid limestone, and means for recycling the neutralized liquid to the spraying the absorbing liquid in the inlet channel.

13. Installation of a wet-type flue gas desulfurization, which includes the tower absorber having a gas flow path defined therein in a direction other than vertical, and comprising an inlet channel for input exhaust gas containing sulfur oxides, zone spray paglesham, an exhaust channel having demister to remove dissipation of fogs, the circulation tank for accumulation of the absorbing liquid discharged from the tower absorber, and for oxidation of sulfur oxides air in the absorbing liquid during the accumulation of the absorbing liquid, and a circulation system for circulating accumulated absorbing fluid to the spray tower absorber, characterized in that the area of spraying the absorbing liquid is placed in the inlet channel, the cross-sectional area perpendicular to the gas flow inlet channel, which includes the spray nozzle, stepped increases in the direction of gas flow, and the cross-sectional area of the low flow area of the intake channel, perpendicular to the gas flow, a smaller square cross section perpendicular to the gas flow cross section of the path of gas flow between the inlet and outlet channels and above the circulation tank.

14. Installation according to p. 13, characterized in that the spray pipes are placed on the many steps in the direction of gas flow in the inlet channel, and the spray nozzle lowest flow speed in the spray pipes placed on sestelo includes creating resistance means, posted by in the direction of the gas flow path of gas flow between the spray pipes and demisters.

16. Installation according to p. 13, characterized in that the spray nozzle is installed on the side wall of the intake channel and contains the means to prevent gas release, installed on the surface of the wall, which is located in a region that is free from spray droplets formed between the spray nozzles.

17. Installation according to p. 13, characterized in that it further includes a spray nozzle mounted on the ceiling area of the circulation tank for spraying the absorbing liquid toward the surface of the liquid in the circulation tank.

18. Installation according to p. 13, characterized in that the spray pipe in the inlet channel fixed their protivopoloznymi ends of its side walls, passing in a horizontal direction across the path of gas flow in the inlet channel to enter the absorbing fluid through the opposite ends.

19. Installation according to p. 14, characterized in that it further includes means to deflect the gas stream to provide Bono p. 13, characterized in that it further includes means for absorbing fluid discharge from the circulating tank and neutralize its limestone particle size greater than the particle size of the gypsum obtained by neutralization of the absorbing liquid limestone, and means for recycling the neutralized liquid to the spraying the absorbing liquid in the inlet channel.

21. Installation of a wet-type flue gas desulfurization, which includes the tower absorber with gas flow path defined therein in a direction other than vertical, and comprising an inlet channel for input exhaust gas containing sulfur oxides, the area of spraying the absorbing liquid through the spray pipes to allow to come into contact with the gas outlet, with demister to remove dissipation of fog, and the circulation tank for accumulation of the absorbing liquid discharged from the tower absorber, and for oxidation of sulfur oxides air in the absorbing liquid during the accumulation of the absorbing liquid, and a circulation system for circulating accumulated absorbing fluid to the spray tower absorber, ex is their opposite ends on its side walls, passing in a horizontal direction across the path of gas flow in the inlet channel, to enter the absorbing fluid through the opposite ends.

22. Installation according to p. 21, characterized in that the inner diameter of each spray pipe at a Central section in the intake channel is smaller than the internal diameter at other sites, with the spray pipe in the Central section of the inlet channel have support.

23. Installation according to p. 21, wherein each spray pipe has a spray nozzle installed below the pipe.

24. Installation according to p. 21, characterized in that the direction of spraying the slurry from murine surface of the intake channel of the spray nozzle is installed on the spray pipes close to the surface of the wall towards each other.

25. Installation of a wet-type flue gas desulfurization, which includes the tower absorber with gas flow path defined therein in a direction other than vertical, and comprising an inlet channel for input exhaust gas containing sulfur oxides, the area of spraying the absorbing liquid to allow part of rvoir for accumulation absorbing fluid, dropped from the tower absorber, and for oxidation of sulfur oxides air in the absorbing liquid during the accumulation of the absorbing liquid, and a circulation system for circulating accumulated absorbing fluid to the spray tower absorber, characterized in that the area of spraying the absorbing liquid is placed in the inlet channel, the installation further includes means to deflect the gas stream to provide turning down the gas flowing from the inlet channel to the outlet channel.

26. Installation of a wet-type flue gas desulfurization, which includes the tower absorber with gas flow path defined therein in a direction other than vertical, and comprising an inlet channel for input exhaust gas containing sulfur oxides, the area of spraying the absorbing liquid to allow to come into contact with the gas outlet, with demister to remove dissipation of fogs, the circulation tank for accumulation of the absorbing liquid discharged from the tower absorber during the accumulation of the absorbing liquid, and a circulation system for circulating accumulated will the soup liquid placed in the inlet channel, when this installation is further includes means for absorbing fluid discharge from the circulating tank and neutralize its limestone, particle size greater than the particle size of the gypsum obtained by neutralization of the absorbing liquid limestone, and means for recycling the neutralized liquid to the spraying the absorbing liquid in the inlet channel.

27. Installation according to any one of paragraphs.1 to 26, characterized in that the velocity of the gas flow in the inlet channel tower absorber is of the order of 5 - 15 m/s

28. Installation of a wet-type flue gas desulfurization, which includes the tower absorber with gas flow path defined therein in a direction other than vertical, and comprising an inlet channel for input exhaust gas containing sulfur oxides, the area of spraying the absorbing liquid to allow to come into contact with the gas outlet, with demister to remove dissipation of fog, and the circulation tank, designed for accumulation of the absorbing liquid discharged from the tower absorber, and to oxidize the sulfur oxide absorbing liquid air at the time the accumulation is eshiwani tower absorber, characterized in that the area of spraying the absorbing liquid is placed in the inlet channel and includes spray nozzles located on the surface of its wall, and means preventing the release of gas, located on the surface of the wall, which is located in an area that is free from spray droplets formed between the spray nozzles.

29. Installation on p. 28, characterized in that the tower absorber made in one piece with the circulation tank and is a construction of self-supporting type, installed on the circulation tank.

30. Installation on p. 28, characterized in that it includes means for changing the direction of gas flow when passing from the inlet port towards the outlet channel.

31. Installation on p. 28, characterized in that it includes means for removal of the absorbing liquid from the circulating tank and neutralize its limestone particle size greater than the particle size of the gypsum obtained by neutralization of the absorbing liquid limestone, and means for recycling the neutralized liquid to the spray in the intake channel.

Prior the p. 17 and 18.

 

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