Separator of dust and pitch acid components from hot gases of gasification plants

FIELD: process engineering.

SUBSTANCE: invention relates to acid components separator. Proposed separator plant comprises tank (8) to accommodate cyclone separator (9). Filter chamber (10) is arranged above said separator (9) in direction of gravity force and equipped with filter plugs (17) and wherein central pipe (20) of cyclone separator (9) is brought. It differs from known design in that separation wall (19) is arranged between cyclone separator (9) and filter chamber. Said separation wall is composed by tapered bottom for central pipe (20) of cyclone separator (9) to pass there through. Note here that smaller-diameter rundown pipe (21) is fitted in central pipe (20) to discharge fine dust. Said pipe (21) is equipped with feed elements (24) to displace fine dust from tapered bottom (19) into rundown pipe (21) and to feed the dust to dust accumulator (23) via dust discharge assembly (22) provided with gates.

EFFECT: higher efficiency of separation.

4 cl, 3 dwg

 

During the gasification of fossil fuels, such as, for example, bituminous or lignite, biomass, residues from refining, it contained chlorine or sulfur react with the formation of acid gases, which leads to associated with erosion and corrosion problems in downstream components of the installation. During the gasification of biomass, in addition, produce a considerable quantity of resin to be removed because of the resin condensates can also result in a Daisy-chained installations to significant problems.

From EP 1870444 A2 is known a method of cleaning gases from the apparatus for dry distillation of wood, which uses the filter cartridges and provides gaseous product more time for chemical reactions in front of the filter candles. Separation in the cyclone in the known method is not provided.

The possible separation of harmful acidic gases may also occur due to the fact that methods used wet washing, which, however, has the disadvantage that the gases must be cooled. Separation of the resin is carried out as a so-called catalytic separation in a separate catalytic smolootdeliteli, with such a device, usually connected after separation H2S and dust removal. If before the filter is connected respectively�appropriate catalyst, it is necessary that the synthesis gas due to heat loss was again heated to the operating temperature between 800°C and 1000°C, which leads to a too high loss of efficiency and to appropriate technical costs.

The aim of the invention is to provide an economical method with appropriate adjustment, which enables reliable separation of acidic compounds HF, HCl, H2S, dust and resin in the highest possible temperature range.

To solve this problem is proposed installation for the separation of acidic components, dust and tar from hot gases gasification plants containing a reservoir in which the cyclone separator are located above it in the direction of gravity of the filter chamber, which is equipped with filter candles and derived Central pipe of the cyclone separator. In the proposed in the invention installed between the cyclone separator and filter chamber is located a dividing wall made in the form of a funnel-shaped bottom, through which passes a Central pipe of the cyclone separator, and in the Central tube is of smaller diameter discharge pipe for discharging the fine dust, fitted with inlet elements to move the fine dust with the funnel-shaped bottom of the drain pipe and connected � the dust collector is supplied through the gateways of the dust discharge unit.

The combination cyclone separator and filter formed candles candle filter inside a single device with the location of these components according to the invention leads to small losses in the flow with a simultaneous high efficiency.

It should be mentioned here that, by itself, the combined apparatus of filter and cyclone known, for example, from German utility model 1879283, it was not drawn special attention to the discharge of fine dust. Compact filters corresponding to the construction shown also in DE 2622938, DE 3230709 A or DE 3422592 AND, to name only a few examples. Modified versions of such devices are shown in US 2941621 or WO 83/03556.

Due to the fact that the dividing wall between the cyclone separator and filter chamber is in the form of a funnel-shaped bottom, through which passes a Central pipe of the cyclone separator, and in the Central tube is of smaller diameter discharge pipe for discharging the fine dust with lead elements to move the fine dust with the funnel-shaped bottom in the drain pipe, is provided to remove the dust.

In this case the transfer elements may be in the form of nozzles, located radially between the head section of drain pipe and the Central pipe at the lowest point of the funnel-shaped bottom.

The invention also provides that the filter cartridges are equipped with catalytic coating and/or catalytic filler and/or that each filter candle is provided with a catalytically active protective filter.

Other features, details and advantages of the invention follow from the following description and drawings, in which is shown:

Fig. 1 is a schematic diagram of an apparatus for carrying out the method according to the invention,

Fig. 2 is a simplified representation in cross section the construction of the apparatus according to the invention,

Fig. 3 is a slightly enlarged view of a fragment of the Central tube in the direction of arrow III in Fig. 2.

Designated in General by the reference symbol 1 in Fig. 1 setting presented in the form of the concept. In this case, where the gasifier 2 is supplied fuel (dotted arrow 3), oxygen (solid arrow 4) and, if necessary, additives (dashed arrow 5). The removal of slag denoted by reference sign 6. For the gasifier 2 installation 7 the removal of sulfur and then the device with the reservoir 8, which combines the cyclone 9 and the filter chamber 10, in which there is a candle filter.

The supply of gas in the cyclone 9 shown by the arrow 11, the output of the useful gas candle filter by the arrow 12. Useful gas, indicated generally by the reference symbol 13 is directed to further re�abode.

The return of the cooling gas from the stream 12 into the zone before you install sulfur removal shown by the dashed arrow 14. In this area before you install sulfur removal can also be given additive, as indicated by the dashed arrow 15.

You can see that, for example, separation of acid gas components, such as separation of H2S, before extraction can occur by entering additives (gasifier and/or cooling gas). It is also possible separation of the resin prior to extraction by means of additives, wherein the preliminary separation of the additive and dust occurs in the cyclone, and the separation of fine dust in the filter candle.

It is also possible separation of the residual resin on the filter candle and/or inside of the filter candle, at the output of filter cartridges may be connected in series protective filter, for example, of ceramic foam. These lters can also be catalytically active. Cooling gas, such as indicated by a partial stream 14a, can be used for cleaning filter cartridges, as will be shown below.

Fig. 2 in simplified sectional view is shown of the apparatus with the tank 8 and the combination of the cyclone with 9 candle filter in the filter chamber 10. To the cyclone 9 through an inlet 16 of the cyclone summarizes the soda�containing particles of gases, however, due to different conditions of pressure most of the particles are shifted down. Pre-treated thus gases pass into the Central pipe of the cyclone separator 9 up in the filter chamber 10, is equipped with a candle filter, where it is treated through filter cartridges 17, comprising the candle filter. The thus purified gas passes through in the upper part of candle filter protective filter 18, and then to leave the tank 8 of the apparatus in the direction of arrow 12.

When the filter cartridges are cleaned, for example by means returned by conduit 14a ago cooling gas passed through the filter dust falls on the downward sloping the bottom of the separation between 19 cyclone 9 and a filter chamber 10, wherein the Central pipe 20 of the cyclone in the bottom 19 has an insert, which is shown in Fig. 3 in a slightly larger view.

Radially spaced tubes 24 discharging the fine dust lead from the bottom 19 in Central discharge pipe 21, which passes through the cyclone and ends at the bottom in the node 22 of discharge of dust, which, through appropriate gateways dust is supplied to the collector 23 of dust.

Of course, the described embodiments of the invention may be modified in many respects without deviating from the basic idea, like that shown in Fig. 2-3 shows only significantly simplified suitable�e vehicles with the tank 8, which is essential for the invention made in the form of a combined separator.

1. Installation for the separation of acidic components, dust and tar from hot gases gasification plants containing the reservoir (8), which are cyclone separator (9) and located over it in the direction of gravity of the filter chamber (10), which is equipped with filter candles (17) and which is derived a Central pipe (20) cyclone separator (9), characterized in that between the cyclone separator (9) and the filter chamber is located a dividing wall (19) made in the form of the funnel-shaped bottom, through which passes a Central pipe (20) cyclone separator (9), and in the Central tube (20) is of smaller diameter discharge pipe (21) for removal of fine dust, fitted with inlet elements (24) to move the fine dust with the funnel-shaped bottom (19) in the drain pipe (21) and connected to the collector (23) dust is supplied through gateway node (22) of discharge of dust.

2. Apparatus according to claim 1, characterized in that the transfer element (24) is in the form of nozzles, located radially between the upper zone of the drain pipe (21) and the Central tube (20) at the bottom of the funnel-shaped bottom (19).

3. Apparatus according to claim 1 or 2, characterized in that the filter cartridges (17) equipped with catalytic p�the covering and/or catalytic filler.

4. Apparatus according to claim 3, characterized in that each filter candle (17) are provided with a catalytically active protective filter (26).



 

Same patents:

FIELD: process engineering.

SUBSTANCE: accumulated gas gating from gasification process at pressure with the use of gas trap and gate bin should allow getting of nitrogen in rough gas to be minimised or completely ruled out. Note here that subsequent chemical synthesis should be, from the very outset, free of nitrogen admixtures. This method effects this by filter elements arranged in said dust trap and subjected to back purging with gas, other than air, containing gas carbon dioxide or pure carbon dioxide gas. Carbon dioxide containing gas for back purging is used in gating bin for pressure increase and dust loosening.

EFFECT: minimised ingress of nitrogen in rough gas.

8 cl, 1 dwg

FIELD: chemistry.

SUBSTANCE: invention can be applied in chemical industry. Synthesis-gas, produced by gasification process and containing CO and H2, as well as ash and dust particles, is directed through connecting pipe (1) into main dust-separator (3), in which main part of dust is separated. After separation of dust flow (4) of solid particles is directed at the same pressure level into reservoir (5), in which pressure is reduced in such a way that formed are flow (19) of discharge gas and solid particles, containing smaller amounts of gas, remaining in empty spaces. Flow (7) of solid particles is directed from reservoir (5) into gas-exchange device (21) in pneumatic way by means of transporting gas (8). Circulation flow of solid particles is created inside gas-exchange device (21) by means of substituting gas (11). Released discharge gas (18) is discharged through dust-separator (13). Dust, obtained in gas-exchange device (21), is supplied into dust accumulator (17) through output system.

EFFECT: claimed invention makes it possible to reduce time, required for degassing of ash dust.

21 cl, 3 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to slag removal in coal gasification or in synthetic gas production. Proposed method comprises feeding slag and fluid from slag bath into lock container via valve. Then, said container is filled with fluid and slag. Slag-water suspension flowing downward is deflected in lock container. Deflected flow flows, partially or completely, in, preferably, circular chamber composed by lock container wall and deflector. Deflected flow is homogenised by perforated discs over the entire cross-section of said mid space or over its part. Particles are partially or completely separated in compliance with size and density by deflection of slag-fluid suspension and by homogenised flow in mid space. Larger particles are deposited in lock container. Smaller particles are discharged from lock container with deflected flow. Deflected flow in mid space, preferably, circular space, flows upward. Said container is emptied via valve. Lock container hot slag withdrawal device includes top and bottom cylindrical parts. Top cylindrical part featured diameter smaller than that of bottom part. Both said parts are jointed together by fitting shaped to truncated cone. Said fitting features angle equal to that of slag natural slope, that is, 30 to 60 degrees to horizontal line.

EFFECT: minimised accumulation of useless slag, better separation of fine and coarse particles.

18 cl, 1 dwg

FIELD: power engineering.

SUBSTANCE: method to gasify solid fuel consists in supplying fuel into a gas generator volume, its pyrolysis and gasification with subsequent treatment of the produced generator gas from moisture, resin and non-gasified remains of solid fuel. Treatment is carried out in the inner volume of the gas generator by exposure to ultrasonic oscillations with frequency of more than 20 kHz and intensity in the range of 130-145 dB. Oscillations are developed by a flat emitter of round or rectangular shape, oscillating when bent at the frequency, which is multiple to the main one. The emitter is excited with a longitudinally oscillating piezoelectric converter supplied with an electronic generator of ultrasonic frequency, which is placed outside the gas generator, but is acoustically connected to it. Exposure is simultaneously carried out by oscillations developed by both sides of the flat emitter, besides, oscillations developed by the emitter side, which is reverse to the inner volume of the gas generator, are sent into the gas generator volume after reflection and passing of the distance exceeding the longitudinal size of the emitter by the value multiple to the half of the length of emitted ultrasonic oscillations in air.

EFFECT: invention makes it possible to reduce carryover of resin, water vapours and non-gasified remains of solid fuel.

2 dwg

FIELD: oil and gas production.

SUBSTANCE: invention refers to procedure for production of synthetic gas containing CO, CO2 and H2 out of carbon containing flow (3) with usage of oxygen containing flow (4). The procedure consists in at least two stages: (a) injection of carbon containing flow (3) and oxygen containing flow (4) into reactor (2) of gasification; (b) in at least partial oxidation of carbon containing flow (3) in reactor (2) of gasification at temperature 1200-1800°C and pressure between 20 and 100 bar, thus producing raw synthesis of gas, (c) in removing raw synthesis of gas produced at stage (b) from reactor (2) of gasification into section (6) of cooling positioned above the reactor of gasification via a pipeline over the reactor of gasification; and (d) in injecting water (17) in form of vapour containing drops of diametre from 50 to 200 mcm into cooling section (2) in the direction from the reactor of gasification at temperature over 150°C. Also amount of injected vapour is chosen to ensure contents from 40 to 60% of volume of water in raw synthesis of gas released from the cooling section.

EFFECT: reduced expenditures.

13 cl, 4 dwg

FIELD: chemistry.

SUBSTANCE: invention is intended for chemical industry, and can also be used in power engineering and municipal economy for production of fuel and synthesisgas by means of hard fuel gasification. The claimed method of hard fuel gasification consists in that carbonisation of hard fuel is carried out in pseudoliquefied layer of heat-carrier material. The obtained fuel gas and hard carbonised residue are separated in device installed in the upper part of the apparatus. Carbonised residue is subjected to gasification by mixture of water vapour and oxygen obtaining synthesis gas. Device for hard fuel gasification consists of two coaxially placed vessels, the outer vessel being used for carbonisation, and the inner one for fuel gasification. In the lower part of the outer vessel, an air-distributing grid, with a layer of pseudoliquefied heat-carrier material arranged on it, is placed. The inner high pressure vessel is placed within the limits of pseudoliquefied layer of heat-carrier material. In the upper part of the outer vessel there is a cyclone for separation of fuel gas from hard carbonised residue, which, under the action of its own weight, flows to gasificator through a vertical pipe.

EFFECT: increased reliability of the fuel gasification process and extension of sphere of the process application due to simultaneous production of fuel and synthesis gases.

2 cl, 1 dwg, 1 tbl, 6 ex

FIELD: power engineering.

SUBSTANCE: plant comprises a fuel-burning unit connected to a stack by means of a horizontal flue equipped with a gate, which is placed in the zone of adjacency of the horizontal flue end towards the stack, a circuit of cleaning of smoke gases, including a waste heat boiler, a smoke exhaust with a guide vane, at the same time the inlet of the circuit of smoke gases cleaning is connected to the horizontal flue in the section between the fuel-burning unit and the gate, and the outlet of the circuit of cleaning of smoke gases adjoins the stack, at the same time the outlet of the circuit of cleaning of smoke gases is arranged oppositely to the outlet of the horizontal flue into the stack. The method of plant operation includes removal of smoke gases from a fuel-burning unit into a horizontal flue, removal of smoke gases from the horizontal flue into the circuit of cleaning of smoke gases with subsequent neutralisation in the waste heat boiler, removal of smoke gases from the cleaning circuit into the stack oppositely to the outlet of the horizontal flue and adjustment of underpressure in the horizontal flue downstream the gate at the side of the stack due to variation of speed of smoke gases supply from the cleaning circuit.

EFFECT: reduced overflow of uncleaned smoke gases into a stack, maintenance and control of the specified flow of cleaned smoke gases for recirculation at different position of a gate and efficient heat recovery of smoke gases.

4 cl, 5 dwg, 6 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention can be applied in chemical industry. Method of removal of sulfur-, nitrogen- and halogen containing admixture, present in synthesis-gas, such, as H2S, COS, CS2, HCN, NH3, HF, HCl, HBr and HI, contains: a) stage of combined hydrolysis of COS and HCN and catching halogenated compounds with application of TiO2-based catalyst which contains from 10 wt % to 100 wt % of TiO2 and from 1 wt % to 30 wt % of at least one sulfate of alkali-earth metal, selected from calcium, barium, strontium and magnesium, b) stage of washing with at least one solvent, c) stage of desulphurisation on catching mass or adsorbent.

EFFECT: invention makes it possible to obtain purified synthesis-gas, which contains less than 10 weight parts per billion of sulphureous admixtures, less than 10 weight parts per billion of halogenated admixtures.

22 cl, 8 tbl, 6 ex

FIELD: process engineering.

SUBSTANCE: invention relates to oil-and-gas industry. Proposed plant comprises refrigerator, pipeline connected with tank vapor zone and refrigerator, pump, shutoff valves and accessories and connection pipelines. Note here that refrigerator 1 is composed of vapor-air mix condenser communicated with refrigerator 2 and comprises cylindrical body 6 with outer heat insulation. Said body accommodates coaxial one or several hollows baffles composed of sleeves 7. Coolant pipeline 8 is coiled outer surface of every said sleeve at staggered pitch to make vapor-air flow swirl to create centrifugal forces and optimum contact with cold surface. Ends of pipeline 8 are rigidly fixed at bottom of said body having coolant inlet and outlet pipes 9, 10 connected with refrigerator 2. Vapor-air mix condensate drain union 11 is arranged at body bottom center and connected via pipe 12 with condensate collection tank 3 equipped with water header 4 with drain valve 5. Pipeline 19 with valve 20 is connected to said tank 3 to communicate the latter with pump 21 of tank 17. Body top is tightly closed by cover 13 fitted with vapor-air mix feed union 14 to feed said mix from tank 17 and union 15 to discharge clean air to drain tank. Note here that refrigerator housing 6 accommodates pressure and temperature gages connected with instrumentation and refrigerator control unit 22.

EFFECT: higher quality of oil products, better ecology.

3 cl, 5 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to selective recovery and removal. Proposed multistage device and method exploits aerodynamic reactors and aerocoagulators. Said devices are connected in series for selective recovery and removal of carbon dioxide gas, mercury, metals and aerosols of solid disperse particles by circulation system of chemical generation-recovery. Said system used solution of alkaline metal chloride after multiple oxidations of mercury vapors and oxides in selective recovery and removal with subsequent oxidation to alkaline metal sulphate and nitrate by evaporation and crystallisation. Carbon dioxide recovery and removal are performed by selective thermal decarbonisation from alikaline fluid with subsequent extraction as gas flow.

EFFECT: extraction of various contaminants from flue gases as commercial byproducts.

FIELD: heating.

SUBSTANCE: invention relates to heat and power engineering and can be used during the cleaning and recovery process of smoke fumes of heat and power installations for protection of ozone screen and reduction of greenhouse effect of ambient air. Cleaning method includes cooling of smoke fumes up to temperature lower the dew point, condensation of water vapor, release of carbon dioxide by absorption and withdrawal of cleaned smoke fumes into the atmosphere. Cleaning of smoke fumes includes absorption of nitric oxides, sulphur oxides, carbon dioxides, drips and water vapors by nontreated sludge of waste water with its simultaneous heating in absorption tower up to fermentation temperature 30-50°C, washing of waste and cooled gas against remains of nontreated sludge by raw water in flushing tower, separation of received mud mixture by means of sedimentation to muddy water and saturated raw sludge in settling tank, withdrawal of muddy water to irrigated fields, mixing of saturated heated raw sludge from absorption tower with sediment from settling tank, fermentation of saturated heated raw sludge in anaerobic digester with receiving of methane and digested sludge. Device for method implementation contains transit gas pipeline 1, heat exchanger 6, stripping 7 and flushing 15 towers, herewith transit gas pipeline 1 is branched to reserve gas pipeline 2 with slide valve 3, connected to smokestack and actuation gas pipeline 4 with slide valve 5, connected successively to heat exchanger 6, absorbing tower 7, inside which downright there are located transversal inclined interlocking partition 8 with aperture 9 in the form of segment in its bottom part, direction of inclination of which is in turn changes in opposing sides, herewith absorbing tower 7 in its top part is outfitted by feeding branch of raw sludge 10, located on inlet into the first from above interlocking partition 8 and build into in top cover by branch pipe of inlet of treated gas 11, connected to reverse actuation gas pipeline 12, and in its bottom part is outfitted by feeding branches of initial gas 13 and saturated raw sludge, agreeably. Reserve actuation gas pipeline 12 is connected also to flushing tower 15, in top part of which it is placed liquid 16, connected to pipeline of raw water 17, herewith its bottom part is connected by pipeline 18 to settling tank 19, top part of which is connected to pipeline of muddy water 20, and bottom part- to pipeline of raw sludge 21, which, in turn, is connected to anaerobic digester 22.

EFFECT: increasing ecological and cost-effectiveness of cleaning process of smoke fumes of heat and power intallation.

2 cl, 2 dwg

FIELD: heating.

SUBSTANCE: invention relates to heat-and-power engineering and can be used in processes of cleaning and recovery of smoke fumes of heat-and-power installations for decreasing of greenhouse effect of ambient air. Cleaning method includes cooling of smoke fumes up to temperature lower than dew point with formation of water vapour condensate, cleaning against carbon dioxide by means of absorption, removal of treated gas into atmosphere and desorption from the solution of carbon dioxide, herewith after cooling smoke fumes are mixed to ozone-air mixture and there are removed from there the most part of nitric oxide ensured by acid formation at condensation of water vapor in vertical tubular heat exchanger, cooled by blast and outer air, it is cleaned condensate against acid components in anion-exchange filter with receiving of solution NaNO3, cleaned against nitric oxide smoke fumes are delivered against carbon monoxide by absorption by solution of monoethanolamine (MEA) in saturator and it is separated from removed drops in entrainment separator, carbonised solution of MEA is heated by means of heat of smoke fumes up to saturation temperature at excessive pressure, it is throttled up to atmospheric pressure and is directed into middle part of decarbonifier, where carbonised solution of MEA is separated for volatile cut, which as a result of condensation in vapor condenser, cooled by feedwater, is divided for condensate of MEA and volatile acid, which is by means of blower partly fed into absorbing tower, where it is mixed to sprayed caustic soda solution with formation of sodium carbonate Na2CO3 and partly - in pure form for realisation to consumers, and decarbonated solution of MEA, which is removed from decarbonifier cube, heated by direct steam, is mixed to condensate from vapor condenser and by recycling pump is again fed to absorption. Device for cleaning includes smoke flue 1, vertical tube heat exchanger 3, saturator 5 with located in its top part liquid dispergator 6, connected by bottom through the first recycling pump 8 to decarbonifier 10. Smoke flue 1 is connected sequentially to heater of solution of monoethanolamine (MEA) 2 and to vertical tube heat exchanger 3, consisting of connected sequentially by gas downright tube air preheater and condenser, agreeably, the latter of which is connected by condensate to anion-exchange filter 4, and by gas - to saturator 5, in top part of which it is additionally located entrainment separator 7, herewith into connection line of bottom of saturator to decarbonifier there are included specified preheater of solution of MEA 2 and additionally - throttle 9, and inside the decarbonifier there are placed top and bottom liquid dispensers 11 and, agreeably, sections, filled by capping 12, herewith top of decarbonifier 10 is connected by pipeline to vapor condenser 13, connected, in turn, through condensate tank 14 and hydraulic hitch 15 with top liquid dispenser 11 of decarbonifier, and by CO2 vapor condenser 13 is connected to blower 16 and absorbing tower 17, upwardly of which it is located liquid disperser 18, herewith bottom liquid dispenser 11 of decarbonifier 10 is connected to throttle 9, and bottom of decarbonifier 10 through pipeline and the second circulating pump 19 is connected to hydraulic hitch 15 of vapor condenser 13 and liquid dispenser 6 of saturator 5.

EFFECT: increasing ecological and cost-effectiveness of cleaning process of smoke fumes from heat-and-power installations against harmful impurities and carbon dioxide.

2 cl, 1 dwg

The invention relates to chemical, gas and oil industries and can be used to retrieve the target fractions of hydrocarbons from natural raw materials

The invention relates to chemical, gas and oil industries and can be used to retrieve the target fractions of hydrocarbons from natural raw materials

The invention relates to a method of processing exhaust gases in dry construction materials and can be used in the building materials industry in the manufacture of cement, lime and other materials with dry method

The invention relates to industrial hygiene, in particular for cleaning the air of industrial premises from harmful gases and dust

FIELD: chemistry.

SUBSTANCE: plate contains a multitude of Venturi tubes, made close to each other in the plate in the form of through holes, passing between lower and upper sides, with a possibility of conducting gas to be purified from a space, located under the plate, which is in the working position, through the Venturi tubes and upwards into an absorbent layer, with each of the Venturi tubes having a narrowing in the centre, in which the gas rate increases in such a way that when the gas flow passes the said narrowing, turbulence occurs.

EFFECT: increased efficiency of gas purification and elimination of bulky equipment.

10 cl, 2 dwg

FIELD: chemistry.

SUBSTANCE: several Venturi tubes, made close to each other in a plate, containing an upper surface, are used; gas at the first stage is transferred through the Venturi tubes in a direction, opposite to the gravity direction, and at the second stage is bubbled through a liquid layer of an absorbent, located on the upper surface.

EFFECT: invention makes it possible to efficiently separate sulphur dioxide and solid particles from flue gases and does not require bulky equipment.

24 cl, 2 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a method of adding oxygen to a liquid absorbent, which contains a compound, capable of reacting with oxygen, in a device (1) for gas purification. Used is the device (1), which contains a unit (16) for the absorbent circulation, made with a possibility of transferring the absorbent from the first place in the device (1) into the second place in the device (1), oxygen is added by adding air to the absorbent in the first point in the unit (16) for the absorbent circulation and a separating unit (16e), made with a possibility of separating gas, contained in the absorbent, from the absorbent in the second point, located above the first point, before return of the absorbent into the second place in the device (1), and a part of oxygen, contained in the air, is introduced into a reaction with the compound before its supply into the separating unit (16e).

EFFECT: possibility of adding a sufficient amount of oxygen to the absorbent and prevention of passage of nitrogen, the remaining part of oxygen and other gases, contained in the added air, which represent harmful admixtures, into the device 1 and their mixing there with purified gas.

8 cl, 2 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to ship building. Proposed system is available in three versions. In compliance with first version, complex system for treatment of bilge water and water downstream of exhaust gas filter comprises one device, i.e. two-stage separator composed by rotary separator and membrane filter to feed cleaned water to exhaust gas filter in closed cycle. In compliance with second version, proposed system comprises controlled-output vacuum fan arranged at engine exhaust line while gases are fed to filters by controlled-displacement shutter. In compliance with third version, controlled pH outboard water is used as a cleaning solution for exhaust gas filter. Alkalinity is ensured by mixing outboard water with sweet water or by adding potassium hydroxide. Amount of cleaning solution fed to the filter is optimised in automatic control over pump delivery depending upon gas cleaning quality and engine load.

EFFECT: decreased emission of nitrogen and sulfur oxides.

3 cl

FIELD: oil and gas industry.

SUBSTANCE: average size of particles of fuel improving agent is within range of 1-100 mcm. Invention is related to method of pozzolana production by heating of the target fossil fuels in furnace of fuel improving agent.

EFFECT: increasing combustion efficiency and decreasing carbon content in ash and in consequence in result of combustion useful material is obtained instead of waste.

16 cl, 6 dwg, 2 tbl

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