Method of the wet ash-trapping with the help of venturi tube

FIELD: chemical industry; metallurgy industry; methods of the wet ash-trapping with the help of Venturi tube.

SUBSTANCE: the invention is pertaining to the method of the wet ash-trapping with the help of the Venturi tube intended for trapping of the fly ash from the flue gases of the boilers burning the solid fuel, and also may be used for trapping of the cement kiln dust in production of the cement and for the dust trapping in the metallurgical, chemical and other industries, where the ash-and-dust catchers use the Venturi tubes. The purpose of the invention is to increase the degree of trapping of the fly ash from the flue gases of the boilers with the Venturi tubes and burning the solid fuels as well as the reduction of the specific consumptions of the water and steam to increase the boilers efficiency by sprinkling of the Venturi tube with the flue gases transiting in it, the acoustic injector giving more thin and uniform atomization of the water at the decreased consumption both of the water and the steam of the sprinkler, where the acoustic field is characterized by the strictly determined frequency, intensity and the variable acoustic pressure and the steam is in the narrow temperature interval. The flue gases passing in the Venturi tube are sprinkled by the acoustic injector using the steam with the temperature of 250-350°С and forming in the volume of the tube the acoustic field, which is characterized by the frequency of 20-22, 36-38 or 44-48 kHz, the variable sound pressure of no less than 140 dB and the acoustic field intensity of no less than 0.5 W/cm2. The offered method, unlike the methods applied now, allows to act on the flue gases transiting in the Venturi tube simultaneously by several methods of deposition of the ash: - the acoustic method (coagulation - under action of the oscillations of the certain frequency, intensity and the variable sound pressure); humidification of the ash particles of ash in the steam-water aerosphere of the very finely sprinkled water with the full spectrum of the drops dimensions for all the sizes of the ash particles). This considerably increases the degree of trapping of the fly ash from the flue gases of the boilers at the simultaneous reduction of the specific consumptions of the water and steam and increases the efficiency of the boilers.

EFFECT: the invention ensures the increased degree of trapping of the fly ash from the flue gases of the boilers at the simultaneous reduction of the specific consumptions of the water and steam and the increased efficiency of the boilers using the solid fuel.

2 dwg, 1 tbl

 

The invention relates to the field of energy, in particular to a method of wet ash collection in power boilers (with Venturi tubes)burning solid fuel. In addition, the invention can be used for dust control in the chemical, metallurgical and other industries.

The most effective (99%) methods of wet ash collection with Venturi tubes, the currently recommended, but implemented in a very limited way, are the following. One of them - intensive irrigation regime (Uraltechenergo). Another method provides for the alteration of existing wet ash collectors in emulsifiers - development "Yuzhmash" [3].

The first method involves increasing the water flow 2.6-2.8 times. Thus increasing the cost of electricity for pumps, exhaust, blower fans on 0,1-0,2%, the decrease in the gross efficiency of the boiler by 1.1-1.4 per cent. Increase the flow of water causes a decrease of the gas temperature after ash up to 52° (valid - 67...68°,C), therefore it is necessary to heat the gases to 67°C.

For the implementation of the method requires considerable expenses:

(a) the replacement or reconstruction of the exhaust due to the increase of the hydraulic resistance of ash collectors;

b) for the construction of ducts for supplying hot air;

C) to increase the working cycle of the water

The second method is also associated with a decrease in temperature of the flue gas after cleaning and need to be heated, i.e. requires significant capital expenditures.

The following way (similar) applies more broadly. Today, the majority of thermal power plants that burn solid fuel, adopted wet trapping ash with Venturi pipe and drip pan [1, 2, 3], the technology of which is long and reliably developed, adapted under produced in the RF equipment has a satisfactory turnaround cycle and relatively low costs.

The main drawback of this generally applied method is the low efficiency of trapping ash, not more than 95-97%.

When gas velocity in the throat of the Venturi tube 46 to 53 m/s, the hydraulic resistance of the pipe - 1000 PA, ash - 1400 PA, trailing dust, gases 1.2-2.0 g/m3. In this way, with specific water flow rate of 0.25 l/m3the final temperature of the gases after the ash collection 67-68°C.

As can be seen from the characteristics, the low degree of trapping ash leaves too high by modern scale dust, gases, when every 0.1% are hundreds of tons neulovimoy ash. The percentage of capture is possible to raise a few specific consumption of water, but then there are all the problems listed in the first two methods associated with a decrease in the temperature of water is inhibiting gases after treatment and the need for their heating, ie requires substantial capital investment.

Another and the most effective way of wet ash collection with Venturi pipe proposed SRIDS "Energostal" prototype that provides a new irrigation system Venturi tubes, comprising two zones of irrigation: first - use water spray (sprayers); second, using the vapor-liquid nozzles of Laval. Finer atomization of the water allows you, as the authors [3, p.48], significantly increase the surface contact with the cleaned gases to reduce the amount of water delivered, and to improve the collection efficiency of particles of ash up to 99%.

However, the main disadvantages of the prototype, as considered equivalent are as follows:

1. The final dust still very high, because, first, in the boiler, the flow of flue gases up to 1 million m3per hour, i.e. up to 660 kg/h neulovimoy ash, and in boilers maximum power of these numbers will be far higher. Secondly, tests were conducted in the boiler, where coal was burned only 20% (8% fuel oil, 72% of gas), and the boiler if necessary, can only operate on coal (1-10% of the oil in the illumination on the injectors). The initial dust will be significantly higher, and the end is unknown, but higher than given in the prototype, since the effectiveness of the methods and systems of ash removal should be determined in extreme conditions, the hen for a softer modes can be predicted by simple extrapolation.

2. Specific water consumption is also great, because the prototype has two zones of irrigation. First - sprayers, the second vapor-liquid nozzles of Laval. Pumps (water nozzle low pressure) give a very rough and non-uniform film spray with particle diameters of the water from 1000 microns and above, therefore, the contact area of water particles from the flue gases is insignificant and requires a large amount of water to capture a specific fraction of ash, which was calculated by the authors, introducing sprayers.

Vapor-liquid Laval nozzle (nozzle high pressure) give finer atomization of water (with a diameter of 150 microns and above), what the prototype does not report, and the area of contact with the combustion gases increases sharply. Table prototype [3] indeed, it is seen that with the increase of steam pressure in front of the nozzles, the specific water consumption and end dust reduced. However, the resulting area of water contact with flue gases corresponding to the obtained dispersion, still very far from optimal, because today you can get a more developed surface water contact with flue gases, having a particle size of 0.05 micron and above, or creating a need (for maximum capture fly ash) interval dispersion. Then end the dust and the specific consumption of water will be significantly reduced, and the degree of recovery of fly ash significantly increased.

3. Very is ISOC specific consumption of steam for atomization of water through the Laval nozzle. Given that about 50% of the water passes through the nozzle, the specific steam consumption is equal 0,31074 kg per 1 kg of water.

Today in energy allowable rate of steam flow rate of 0.01-0.03 kg 1 kg raspisivaem environment, such as fuel oil, i.e. the prototype has a specific steam consumption is 10 times higher than normal.

The main objective of the invention is to increase the degree of trapping the fly ash from the flue gases of boilers burning solid fuel.

Another goal is the reduction of specific water consumption (l/m3flue gas) and steam (kg/kg raspisivaem water) to improve boiler efficiency and the efficiency of the method.

This objective is achieved in that in the known method (prototype) capture the fly ash from the flue gas wet ash collectors with Venturi tubes instead of the coarse water spray atomization in the first zone and vapor-liquid Laval nozzles with finer atomization in the second zone, for irrigation of passing the flue gases is established along the axis of the Venturi tubes one Paramahansa nozzle with the acoustic stage (acoustic nozzle), for example, patent 1241022 [8], with the necessary flow of water and steam, creating an acoustic field with the required variable sound pressure, intensity and frequency of promoting coagulation of particles of ash.

Figure 1 shows the acoustic nozzle.

Figure 2 shows a longitudinal section of the Tr which would Venturi with an acoustic nozzle, where it is evident that the pipe is in a vertical position and consists of a tapering part 1 (confuser), the cylindrical part 2 (neck) and extending part 3 (of the cone).

Along the axis of the pipe is one of the acoustic nozzle 4 nozzle 5 and 6 for supplying water and steam respectively. Water is supplied, as mentioned above, unlike the prototype, only one nozzle, its consumption depends on the amount of irrigated flue gases at the inlet of the Venturi pipe and the need for maximum capture of ash.

Steam is supplied under pressure not lower than 0.3 MPa (working conditions of acoustic node), which is also different from the prototype, where the optimal pressure is much higher (1.1 MPa) and hence higher specific consumption of steam.

In the acoustic nozzle can be used and higher vapor pressure. Consumption, it will not increase since the expiration of steam from the nozzle of the injector is always supersonic.

Comparative analysis of the proposed solutions with the prototype shows that the inventive method differs from the known fact that, firstly, there is a fundamentally new device - jet acoustic - to more dispersed atomization of water and irrigation of flue gases. Secondly, it combines several factors (mechanisms) deposition of fly ash, including acoustic (with oscillations certain parameter is in on passing flue gases), anyone not previously used to capture the fly ash.

Consider the impact of each of these differences on the purpose of the present invention: enhanced capture ash and reduction of specific consumption of water and steam.

The nozzle acoustic, figure 1, differing from the sprayers (no pair, where particles raspisivaem water have a diameter above 1 mm) and vapor-liquid Laval nozzles (water and steam are fed through one nozzle where the steam is completely condensed and not actually involved in the capture of ash), has two independent channels and an acoustic generator that runs on steam with a temperature in the range of 250-350°C. Used in the steam generator, dispersive water due to the alternating sound pressure (up to 163 dB), then participates in the capture of ash, moistening the dust particles, which are then faster and easier to stick together, forming legkousvojaemaja units.

Water passing through the swirl at the exit from the nozzle forms (due to centrifugal force) bell (torch) 7 with the desired angle (adjustable gap 8)to lock the neck of the Venturi tubes and skip the entire volume of the flue gas through a steam environment, activated acoustic field.

The degree of dispersion (0.05 to 300 μm) higher than the Laval nozzles and can still be adjusted to better capture ash. Required fractiona to increase [4]. The latter is particularly important, as the dusty gas stream (from tenths of a micron to 25 microns) comes in a relatively short confuser, where the acceleration of the motion of gases and ash particles. However, the finer particles of ash, the greater the rate they acquire, and drops of water due to the greater mass have a lower speed than the ash particles [2]. Due to the significant difference of their velocities along the length of the confuser, as well as in the neck and the cone is an intensive coagulation ash particles and water - inertial deposition. This mechanism theory gives a crucial role in the purification of gases, but it is effective for ash particles of the order of 5-15 µm [2, 9], and below 5 microns and above 15 μm, its efficiency decreases sharply.

Particles below 5 microns in the vast majority are not recovered, but they are especially dangerous ecologically, because enriched toxic trace contaminants, especially heavy metals [2, p.10].

Here is manifested the crucial role of acoustic nozzle, which not only provides fine atomization with a full range of sizes of water droplets under all sizes of ash particles in the inertial deposition, but also opens the possibility of using other mechanisms to capture the fly ash. This is using:

1) steam condensation on the particles of fly ash of all sizes, which is typical of the nozzle acoustic, where PA is (at a temperature of 250-350 With° ), used in the generator becomes saturated and continues to move through the Venturi pipe, facilitating and accelerating the formation of aggregates of ash, which themselves ("dry") does not stick together, and maintaining the temperature of the flue gas is not lower than 67°C. reducing the steam temperature below 250°With a resulting decrease of temperature of exhaust gases below 67°and the excess of 350°gives, on the contrary, the increase in flue gas temperature above 75°that leads to the heat loss from the exhaust gases;

2) acoustic coagulation, which, as the test showed, is an effective method of thin clearing. Its mechanism of action is that under the action of the alternating sound pressure alternating motion of particles in an acoustic field is different for particles of different mass and depends on the frequency of the sound. At low frequencies (0.5-2 kHz) particles of any size completely follow the fluctuations of the environment. With increasing frequency fields heavier particles take less part in the General movement. At frequencies of about 100 kHz only ultramicroscopic small particles make full oscillations, large particles move more or less complex trajectories [9] and with different speeds.

Large differences in the velocities of particles of different masses lead to the fact that, first, it significantly increases the trade the ion deposition of ash particles of all sizes in contrast to inertial deposition, discussed above for Venturi tubes without the acoustic field. Secondly, the particles of this heterogeneous system there hydrodynamic forces of attraction (force Bernoulli)associated with radiation pressure, which grow at the convergence of the particles [9].

Thus, in the acoustic field under the effects of separation and hydrodynamic attraction significantly accelerate the process of convergence, collision and merging of ash particles in the aggregates.

Application of acoustic coagulation is known, for example, sulfuric acid aerosols and fertilizers [5, 6], but used a gas-jet generators (static or dynamic siren), which differ from the acoustic nozzle inhomogeneous acoustic fields and impact without water [5].

The most difficult choice of frequency of exposure, because to capture the fly ash acoustic field was not applied due to long-standing opinion that formed in any units immediately destroyed after exiting the acoustic field [6, 7].

In the present invention, this was not confirmed and the authors found that the process of acoustic coagulation is influenced by both the characteristics of the fly ash (concentration, dispersion, clivemont)and field characteristics (frequency, alternating sound pressure, sound intensity, the exposure time), which is s can be set and adjusted to the specific conditions GRES (TPP).

So, given that the way the prototype does not provide trapping particles of fly ash up to 5 μm, the authors tested and selected certain interval of frequencies, in which, firstly, the particles of fly ash could oscillate with frequency and amplitude close to the parameters of the acoustic field, when dramatically increases the number of collisions of particles and formation of aggregates.

Secondly, the frequency of exposure fields on the particles of fly ash must be such that completed the formation of aggregates in the flue gases even at maximum speed of their movement in the neck of the Venturi tubes - 40 m/s and above. For example, if the field frequency is 20 kHz each liter of a moving mass of exhaust gases subjected to alternating sound pressure 800 times.

Thirdly, the frequency of the field must ensure not only the effectiveness of coagulation of fly ash in size from 5 microns and below, but the range of dispersion raspisivaem water discussed above. The higher the frequency of the field, the more you want to make power with equal intensity field.

In addition, the use of frequencies below 16 kHz (region audible sounds) requires the protection of personnel.

The authors have obtained three frequency high, which saw the largest collection efficiency of fly ash: 20-22 kHz, 36-38 kHz and 44-48kHz, which is connected, apparently, with different conditions of combustion of solid fuels, the initial dust, exhaust gases, changing the size of the fly ash.

The proposed method of wet ash collection with the Venturi pipe is implemented as follows.

Along the axis of the Venturi tubes, the confuser is installed acoustic nozzle, as shown in figure 1, which is provided with water (5) and pairs (6).

The pressure is measured by pressure gauges. The nozzle [8] is run by steam under pressure not lower than 0.3 MPa at a temperature in the range of 250-350°C.

The generator, which acts pairs with supersonic speed, forms around the nozzle acoustic field to the desired frequency. In this case: 20-22 kHz, 34-36 kHz or 44 to 48 kHz when AC sound pressure of not lower than 140 dB (intensity not lower than 0.5 W/cm2).

The nozzle [8] works equally well for any more high pressure steam (with his constant flow rate)that is determined only by the steam pressure available at the facility, under which are calculated structural elements of the nozzle.

The steam temperature is determined by the need to maintain the temperature of the flue gas is not lower than 67°C.

Since the acoustic field is set simultaneously with the supply of steam, then turns on the water supply, pressure and flow rate which defined what are the conditions of irrigation Venturi tubes, i.e. operating conditions: dimensions of the pipe, the volume passing flue gas per hour, the initial dust, temperature of exhaust gases and other

Working injector (figure 2) has an opening angle of the torch 60-80° (depends on the size of the Venturi tubes) and locks the neck of the tube, so that all flue gases are passed through the acoustic field mist steam environment with a view to obtaining the greatest efficiency of ash removal. Nozzle when configuring can move through an adjustable gap 8.

Thus, the dust-Laden gas flows in a relatively short confuser, where the acceleration of the motion of gases and ash particles (the smaller of the ash particles, the greater the speed they get).

In this same area confuser acoustic nozzle delivers the spray water with a particle size of 0.05 to 300 μm and exhaust the steam generator with the required frequency, variable sound pressure and intensity.

Crossing the dusty gas stream with sprayed water flow (torch) and steam, which carry the acoustic oscillations, forms cancerogene (multicomponent) diffuse field with a powerful turbulization and special, the above effects, inherent only to the acoustic field.

The result of this interaction (mainly in the confuser, the neck andpartially in the diffuser) is an intensive coagulation of particles of ash.

In this case, as the test showed, it is not possible not only 100%breakthrough (incomplete deposition) any fraction of ash, but even 30%overshoot for the reasons mentioned above.

And capture the largest particles of ash (above 15 µm) and very small (less than 5 microns), no possible way for prototype runs in the proposed method is basically different mechanisms.

In the first case, for each of the ash particles have the appropriate water particle with which it has a significant speed difference - inertial deposition.

In the second case, coagulation ash particles (90%) under the effect of separation and hydrodynamic attraction discussed above.

Active couples, penetrating throughout the volume of the confuser, throat and diffuser (due to the effects of acoustics), promotes coagulation of the particles of fly ash in all sizes.

The proposed method of wet ash collection with Venturi pipe may be implemented in any steam generating unit that burns solid fuel, as well as other objects, uses wet precipitators with a Venturi pipe for dust, cement and other hard materials.

Thus, the combination of several mechanisms to capture fly ash significantly increased the efficiency of wet ash collectors with Venturi tubes, as shown in the table.

<> The use of the proposed method is most effective for capturing the most subtle fractions of volatile materials.

The main thing is the degree of capture of fly ash increased to 99.6%.

The steam consumption is reduced 100-fold, from 0.3 kg/kg of water to 0.003 kg/kg of water through the use of acoustic nozzle [8], providing the use of steam and the optimal interval of temperatures.

Consumption of water for irrigation Venturi tubes reduced 1.66 times due to more subtle polydisperse water atomization and application of the acoustic field of a certain frequency and power.

№p/pThe inventive methodThe placeholderSimilar
1. Fuel1) Coal of different grades - 98%

2) Oil - 2%
3) coal ASH - 20%

4) gas - 72%

5) oil - 8%
1) the coal ASH - 20%

2) gas - 72%

3) the oil - 8%
2. The flow of flue gases at the entrance to the ash, m3per hour600000-1200000684000-1000000684000-1000000
3. The initial dust, g/m3884040
4. The final dust, g/m30,3520,25-0,351,2-2,0

Not used
5. The collection efficiency of ash, %99,699,1-99,395-97
6. The speed of the gases in the throat of the Venturi tubes, m/s45-555346-53
7. The temperature of the gases to ash, °130-150130-150130-150
8. The hydraulic resistance of the pipe Venturi, PA10001050-11001000
9. The temperature of the gases after ash, °68-7064,5-6767-68
10. Steam pressure, MPa1.1 (before the nozzle)1.1 (in front of the Laval nozzles)Vapor not used
11. The temperature of the steam, °280was not measuredVapor not used
12. Specific steam consumption, kg/kg raspisivaem water.0,0030,31074Vapor not used
13. Specific water consumption, l/m3flue gas.0,05-0,070,09-0,110,25
14. The acoustic field frequency, kHz20-22Not usedNot used
15. Alternating sound pressure field, dB.150Not used
16. The field intensity, W/cm20,6-0,8Not usedNot used

Checking the invention "Method of wet ash collection with Venturi pipe" was conducted on models, as well as on boilers burning coal of various grades. Preliminary tests gave positive results (shown in table), confirming the correctness of the chosen solutions, and is currently carrying out preparatory work for translation boilers Vorkuta CHPP-2 in this method the ash collection.

LITERATURE

1. Guidelines for the commissioning of wet ash collectors with Venturi tubes. MU 34-70-055-83. Southeners, M., 1984

2. Lignup, Ennedi. Design and development of ash collectors SVD-VTI-UTE. All-Union Institute for training. The Ministry of energy of the USSR, M., 1989

3. Gmonth and others. The efficiency of wet ash collectors. The journal "Industrial energy" №2, 1997

4. Vasulka, Avizohar. Reconstruction of burners boilers KVGM 20, KVGM 100, 10 representatives of the Committee with the transition to Paramahansa nozzle with the acoustic stage. Journal of Industrial energy No. 2, 1992

5. Melavalavu and others. "Investigation of flue gas cleaning plants sulfuric acid and the o enable increases fertilizer". Collection of Materials of the jubilee scientific conference". Odessa, 1968

6. Nelsoniana. Coagulation of aerosols. In the book "Physical principles of ultrasonic technology." M., Nauka. 1970

7. Lbergman. "Ultrasound and its application in science and technology." Foreign literature. M., 1957

8. Vasulka, Ciaramita, Cedarmill, Wamerican, Peargin, Whitepaw. "Acoustic injector. Patent No. 1.241.022.

9. Imature. "Ultrasound technician". M., 1962

The method of wet ash collection with Venturi pipe, in which the flue gases passing through the Venturi pipe irrigate water nozzles, characterized in that the flue gases passing through the Venturi pipe irrigate acoustic nozzle, working in tandem with steam temperature of 250-350°and creating in the volume of the pipe acoustic field, which is characterized by the frequency 20-22, 36-38 or 44-48 kHz, variable sound pressure of not lower than 140 dB, and the intensity of the acoustic field is not lower than 0.5 W/cm2.



 

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3 cl, 3 dwg, 2 ex

FIELD: processing of gas-liquid flows; steam boilers.

SUBSTANCE: device for vapor processing has contraction tube 1 which has lower generator to form angle of 5-60є, with lower generator of neck 2. Neck 2 is made in form of cylinder; there are screw-shaped slots 3 in the walls of the neck. Neck 2 is disposed horizontally or at small angle and is connected with L-shaped diffuser 4. Lower generator of the diffuser is disposed at angle of 5-40є and diffuser 4. Neck 2 is enclosed in duct 5 which is filled with feed water. Feed water is supplied to duct through feed water supply branch pipe 6. Feed water is removed from slots 7 through branch pipe. Breaking cap 8 is coaxially mounted at output of diffuser 4. Contraction tube 1, neck 2, duct 5 filled with feed water and diffuser 4 provided with breaking cap are all enclosed into casing 9 filled with water. Level of fluid and level of feed water inside duct are set up depending on mode of operation of apparatus, moreover level of feed water should be as high to keep neck 2 partially submerged into the fluid. Cleaned vapor removing branch pipe 10 is mounted at upper part of casing 9. Vapor flow is supplied to casing 9 through input branch pipe 11 provided with screw-shaped slots 12. Lower generator of input branch pipe 11 is disposed at angle of 90-160є to lower generator of contraction tube 1. Screw-shaped slots 3 are disposed in neck 2 along all its length in such a way that some of screw-shaped slots 3 can be totally submerged into liquid. Screw-shaped slots 3 provide entering into neck 2 together with simultaneous twisting of vapor flow to form foam-drop area in neck 2 and at the start point of diffuser 4. Screw-shaped slots always provide their contact with surface of fluid which results in more intensive crushing of fluid in duct 5.

EFFECT: improved efficiency of water separation; simultaneous washing of vapor with feed water.

1 dwg

FIELD: methods of effective commixing of two or more fluid mediums.

SUBSTANCE: the invention is pertinent to a method of effective commixing of two or more fluid mediums, in particular, fluid mediums in different phases. The invention also is dealt with a device for implementation of the method. The invention, in particular, concerns to a method of distribution of a liquid in a gas stream providing for delivery of a liquid in the form of a ring along an inner surface of a pipe, in which a gas steam is passing. At that the gas stream retracts the liquid, passing as a thin film along the inner surface of the pipe towards a sharp edge on the pipe mouth, where the liquid falls down from the pipe surface and tightly commixes with the gas. The Device for realization of the method contains a turbulent mixer with a narrowing section of the pipe, in which the gas passes; an inlet opening for a liquid, the is made with a capability to form a ring out of the liquid passing along the inner surface of the pipe. The invention ensures improved distribution of a dissipated liquid in a gas in a broad range of consumption of liquids.

EFFECT: the invention ensures improved distribution of a dissipated liquid in a gas in a broad range of consumption of liquids.

27 cl, 11 dwg

The invention relates to household appliances

The invention relates to apparatus for wet gas cleaning from dust and keep them cool and can be used to capture fine aerosols, dust and technological aspiration emissions, in particular ash particles in the flue gases of boilers and industrial furnaces

The invention relates to a wet gas cleaning devices and can be used in systems of dust and ash removal power plants, chemical production, construction industry, etc. using low-pressure Venturi scrubbers large unit performance pipe-coagulator rectangular

The invention relates to a power system, chemical, metallurgical and other industries and is intended for use in the system of the wet purification of process gases

The invention relates to irrigation wet separator for exhaust air

The invention relates to a device for purification of air from the aerosol formed from the liquid product: oil and condensation admixture with a particle size of generally not more than 1 μm

The invention relates to the field of purification of gases, in particular to a device for wet dust collection, for example for cleaning of flue gases from ash

FIELD: methods of effective commixing of two or more fluid mediums.

SUBSTANCE: the invention is pertinent to a method of effective commixing of two or more fluid mediums, in particular, fluid mediums in different phases. The invention also is dealt with a device for implementation of the method. The invention, in particular, concerns to a method of distribution of a liquid in a gas stream providing for delivery of a liquid in the form of a ring along an inner surface of a pipe, in which a gas steam is passing. At that the gas stream retracts the liquid, passing as a thin film along the inner surface of the pipe towards a sharp edge on the pipe mouth, where the liquid falls down from the pipe surface and tightly commixes with the gas. The Device for realization of the method contains a turbulent mixer with a narrowing section of the pipe, in which the gas passes; an inlet opening for a liquid, the is made with a capability to form a ring out of the liquid passing along the inner surface of the pipe. The invention ensures improved distribution of a dissipated liquid in a gas in a broad range of consumption of liquids.

EFFECT: the invention ensures improved distribution of a dissipated liquid in a gas in a broad range of consumption of liquids.

27 cl, 11 dwg

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