CN114939336B - Desulfurization, denitrification and decarbonization device for coal-fired flue gas - Google Patents
Desulfurization, denitrification and decarbonization device for coal-fired flue gas Download PDFInfo
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- CN114939336B CN114939336B CN202210777831.4A CN202210777831A CN114939336B CN 114939336 B CN114939336 B CN 114939336B CN 202210777831 A CN202210777831 A CN 202210777831A CN 114939336 B CN114939336 B CN 114939336B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/62—Carbon oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
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Abstract
The application discloses a desulfurization, denitrification and decarbonization device for coal-fired flue gas, which relates to the field of waste gas treatment and comprises a tower body with liquid inside, wherein a plurality of spraying components positioned above the liquid level are arranged inside the tower body, a conveying pipe is arranged on the outer side wall of the tower body and goes deep into the liquid in the inner cavity of the tower body, a dispersing component for uniformly distributing the flue gas is arranged on the inner wall of the tower body, and the dispersing component is communicated with the conveying pipe; the device comprises a tower body, wherein the tower body is provided with a plurality of reaction tubes which are arranged on the outer side wall of the tower body and extend into the inner cavity of the tower body, and the inner wall of the tower body is provided with a distribution assembly which is communicated with the corresponding reaction tubes and enables the chemical substances to be uniformly distributed. The application has the effect of improving the reaction of the flue gas and lime water.
Description
Technical Field
The application relates to the field of waste gas treatment, in particular to a desulfurization, denitrification and decarbonization device for coal-fired flue gas.
Background
The flue gas generated after coal combustion contains a large amount of sulfur-containing, carbon-containing and nitrogen-containing substances, wherein the main substances are sulfur dioxide, nitrogen dioxide, carbon dioxide and the like, and untreated flue gas is directly discharged into the air, so that environmental pollution can be caused.
In the related art, the treatment of the flue gas in a factory firstly introduces the flue gas into lime water for reaction, and then sends the flue gas into various devices for further treatment.
In the process of realizing the application, the inventor finds that at least the following problems exist in the technology, and in the process of introducing the flue gas into lime water, the flue gas has a trend of upward movement due to high flow velocity of the flue gas, so that the flue gas is unevenly distributed in the lime water, and the flue gas purifying effect is poor.
Disclosure of Invention
The application provides a desulfurization, denitrification and decarbonization device for coal-fired flue gas, in order to improve the effect of fully reacting flue gas in lime water.
The application provides a desulfurization, denitrification and decarbonization device for coal-fired flue gas, which adopts the following technical scheme:
the desulfurization, denitrification and decarbonization device for the coal-fired flue gas comprises a tower body with liquid inside, wherein a plurality of spraying components positioned above the liquid level are arranged inside the tower body, a conveying pipe is arranged on the outer side wall of the tower body and penetrates into the liquid in the inner cavity of the tower body, a dispersing component for uniformly distributing the flue gas is arranged on the inner wall of the tower body, and the dispersing component is communicated with the conveying pipe; the device comprises a tower body, wherein the tower body is provided with a plurality of reaction tubes which are arranged on the outer side wall of the tower body and extend into the inner cavity of the tower body, and the inner wall of the tower body is provided with a distribution assembly which is communicated with the corresponding reaction tubes and enables the chemical substances to be uniformly distributed.
By adopting the technical scheme, firstly, the flue gas enters the tower body through the conveying pipe and then reacts with liquid in the tower body so as to remove sulfur-containing, nitrogen-containing and carbon-containing substances in the flue gas, the liquid can be economical lime water or other substances can be added, the lime water and the sulfur-containing, nitrogen-containing and carbon-containing reactions can produce precipitation, so that desulfurization, denitration and decarburization effects are realized, and the flue gas enters the dispersing assembly, so that the flue gas can be uniformly distributed in the liquid, and the flue gas and the liquid can be fully reacted; staff can add the chemical substance in to the reaction tube for there is abundant calcium hydroxide in the tower body and the material reaction in the flue gas, and gets into distribution assembly through the reaction tube, realizes the evenly distributed of calcium hydroxide, makes impurity energy and calcium hydroxide fully react in the flue gas.
Optionally, the dispersing assembly comprises a first reticular pipe which is arranged on the inner wall of the tower body and uniformly distributed on the cross section of the tower body, the first reticular pipe comprises a plurality of conveying branch pipes which are mutually parallel, and the conveying branch pipes are mutually communicated; a plurality of air holes are uniformly formed in one side, deviating from the liquid level, of the conveying branch pipe, folded plates used for enabling gas distribution to be more uniform are arranged on the outer side wall of the conveying branch pipe, the folded plates are located below the air holes of the corresponding conveying branch pipe, and the cross sections of the folded plates are of inverted V shapes.
By adopting the technical scheme, as the reaction of the calcium hydroxide and the flue gas can generate the sediment, the side wall of the conveying branch pipe, which deviates from the liquid level, is uniformly provided with a plurality of air holes, so that the possibility that the sediment enters the conveying branch pipe is reduced, and the possibility that the conveying branch pipe is blocked is reduced; the existence of folded plate is in order to make behind the flue gas spill over the conveying branch pipe more evenly distributed in the tower body on the one hand, and on the other hand folded plate can block partial precipitate reverse entering conveying branch pipe.
Optionally, the distribution assembly comprises second reticular pipes which are arranged on the inner wall of the tower body and uniformly distributed on the cross section of the tower body, and the second reticular pipes comprise a plurality of reaction branch pipes which are mutually parallel, and the reaction branch pipes are mutually communicated; the second reticular tube is arranged on the upper side and the lower side of the first reticular tube; and the reaction branch pipes are provided with a plurality of release holes, the release holes of the reaction branch pipes above the first mesh pipes face the first mesh pipes, and the release holes of the reaction branch pipes below the first mesh pipes face the first mesh pipes.
By adopting the technical scheme, the release holes above the first reticular tube are downward, so that the blockage of the reaction branch tube by sediment is reduced; the release holes below the first reticular tube face upwards, so that the smoke can be fully contacted with the release holes, and the reaction is quickened.
Optionally, the first mesh tube and the second mesh tube are both rotatably connected to the inner wall of the tower body, the rotation axes of the first mesh tube and the second mesh tube are perpendicular to the length direction of the corresponding conveying branch tube or reaction branch tube, and the ends of the conveying branch tube and the reaction branch tube are both provided with openings; the connecting parts of the first reticular pipe and the conveying pipe and the connecting parts of the second reticular pipe and the reaction pipe are respectively provided with a bendable and telescopic bent pipe; the inner wall of the tower body is also fixed with a plurality of limiting rings for limiting the rotation angles of the first reticular tube and the second reticular tube.
Through adopting above-mentioned technical scheme, there is the precipitate in carrying branch pipe and reaction branch pipe, perhaps has because factors such as unstable of flue gas all can make first netted pipe and second netted pipe rotate, and the precipitate can follow release hole, gas pocket, opening part outflow in the rotation process, reduces the possibility of the jam reaction branch pipe of impurity or carrying branch pipe.
Optionally, the tower body inner wall is provided with the clear miscellaneous water pipe that is located first netted pipe below, and clear miscellaneous water pipe is located between first netted pipe and the reaction branch pipe, is provided with the washing shower nozzle that is used for spraying liquid to first netted pipe on the clear miscellaneous water pipe.
Through adopting above-mentioned technical scheme, when there is a large amount of impurity in the conveying branch pipe, the accessible washs the shower nozzle and clear up.
Optionally, the tower body inner wall is provided with two loading boards that are located the liquid level top, and two loading boards are located a plurality of spraying assembly below, are provided with a plurality of globules that are used for reducing the quick outflow of flue gas between two loading boards.
Through adopting above-mentioned technical scheme, a plurality of globules can reduce the flue gas and spill over fast from the liquid for the dwell time of flue gas in the liquid becomes long, makes the reaction more abundant.
Optionally, a collecting slat is arranged on the inner wall of the tower body, and the collecting slat is positioned between the upper reaction branch pipe and the lower bearing plate; a plurality of collecting boxes are slidably arranged on the collecting lath, the adjacent collecting boxes are connected with each other, a plurality of collecting holes are formed in the side wall of each collecting box, a top plate positioned above the collecting boxes is fixed on the side wall of each collecting box, and the cross section of each top plate is inverted V-shaped; the side wall of the tower body is provided with a plurality of tower doors which are used for communicating the inner cavity of the tower body, and each collecting slat corresponds to one tower door.
Through adopting above-mentioned technical scheme, the collecting box can collect partial precipitate, reduces the precipitate and blocks up the possibility of carrying branch pipe and reaction branch pipe, and the flue gas can bring the precipitate upward movement, and the precipitate touches the lower surface of touching the roof, will gather in the collecting box along the slope of the lower surface of roof, and after the tower body stop work, the staff can open the tower door, realizes the clearance to the collecting box.
Optionally, the bottom plate of the tower body is obliquely arranged; the outer side wall of the tower body is provided with an output pipe for communicating the inner part of the tower body to realize liquid discharge, and the output pipe is positioned below the lower reaction branch pipe.
By adopting the technical scheme, most of the sediment can sink to the bottom plate of the tower body, and the sediment is discharged from the output pipe through the inclined bottom surface of the tower body.
Optionally, a flat demister positioned between the spraying components is arranged on the inner wall of the tower body.
Through adopting above-mentioned technical scheme, the flue gas that comes out from the ball clearance will pass through spray assembly, further gets rid of impurity or dust in the flue gas, and flat plate defroster makes its distribution even once more, and reduces smiling impurity upward movement in the flue gas simultaneously.
Optionally, the spray assembly comprises a spray pipe fixed on the inner wall of the tower body, and a plurality of spray nozzles are arranged on the spray pipe.
Through adopting above-mentioned technical scheme, spray shower nozzle realizes the purification to the flue gas on the one hand, on the other hand can realize the clearance to dull and stereotyped defroster.
In summary, the present application includes at least one of the following beneficial technical effects:
the flue gas enters the conveying branch pipe through the conveying pipe, so that uniform distribution in the liquid is realized, chemical substances enter the reaction branch pipe through the reaction pipe, uniform distribution is realized, and then, full reaction in the flue gas and the liquid is realized.
As sediment can be generated in the reaction, the possibility of blockage of the conveying branch pipe and the reaction branch pipe is reduced by the modes of realizing the rotation of the first reticular pipe and the second reticular pipe, arranging a cleaning nozzle and the like.
Drawings
FIG. 1 is a schematic view of the overall structure of the inside of a tower according to an embodiment of the present application.
Fig. 2 is a schematic view of the internal structure of the tower.
Fig. 3 is a schematic view of the structure of the delivery manifold and the flaps.
Fig. 4 is a schematic structural view of the connection of the collecting tank and the tower.
Reference numerals illustrate:
1. a tower body; 2. a spray assembly; 3. a delivery tube; 4. a dispersion assembly; 5. a reaction tube; 6. a distribution component; 7. a first mesh tube; 8. a conveying branch pipe; 9. air holes; 10. a folded plate; 11. a second mesh tube; 12. a reaction branch pipe; 13. a release hole; 14. bending the pipe; 15. a confinement ring; 16. a water pipe for removing impurities; 17. cleaning the spray head; 18. a carrying plate; 19. a pellet; 20. collecting the battens; 21. a collection box; 22. a top plate; 23. a tower door; 24. an output pipe; 25. a flat plate demister; 26. a shower pipe; 27. spraying nozzle; 28. a collection hole; 29. and (5) supporting bars.
Detailed Description
The application is described in further detail below with reference to fig. 1-4.
The embodiment of the application discloses a desulfurization, denitrification and decarbonization device for coal-fired flue gas. Referring to fig. 1, the tower comprises a tower body 1, a conveying pipe 3 welded on the outer side wall of the tower body 1, and flue gas is input into the tower body 1 from the conveying pipe 3; the tower body 1 is internally provided with liquid, the liquid contains calcium hydroxide for realizing desulfurization, decarbonization and denitrification, the reaction of flue gas and lime water generates precipitation, and the conveying pipe 3 passes through the tower body 1 and goes deep below the liquid level; the inner wall of the tower body 1 is provided with a dispersing assembly 4 for uniformly distributing the flue gas, and the dispersing assembly 4 is communicated with a conveying pipe 3; the outer side wall of the tower body 1 is welded with a plurality of reaction pipes 5 for adding chemical substances, the reaction pipes 5 are communicated with the inside of the tower body 1 and extend below the liquid level, a plurality of distribution assemblies 6 are arranged on the inner wall of the tower body 1, the distribution assemblies 6 are positioned on the upper side and the lower side of the dispersion assembly 4, and the distribution assemblies 6 are communicated with the corresponding reaction pipes 5; flue gas enters the tower body 1 through the conveying pipe 3, then the uniform distribution in the liquid is realized through the dispersing component 4, chemical substances containing calcium hydroxide are input into the tower body 1 through the reaction pipe 5, and the chemical substances are uniformly dispersed through the distributing component 6, so that the flue gas and the chemical substances can fully react.
Referring to fig. 1, 2 and 3, the dispersing unit 4 includes a first mesh tube 7 disposed on an inner wall of the tower 1, and the first mesh tube 7 is uniformly distributed on a cross section of the tower 1; the first reticular tube 7 comprises a plurality of conveying branch tubes 8, and the axes of the conveying branch tubes 8 are mutually parallel and are mutually uniformly arranged at intervals; the adjacent conveying branch pipes 8 are mutually communicated, a plurality of air holes 9 are formed in one side, deviating from the liquid surface, of each conveying branch pipe 8, the air holes 9 are uniformly arranged at intervals along the axial direction of each conveying branch pipe 8, and the possibility that impurities are detained in the conveying branch pipes 8 is reduced when the air holes 9 are downwards formed.
Referring to fig. 1 and 2, the distribution assembly 6 includes a second mesh tube 11 disposed inside the tower 1, the second mesh tube 11 being uniformly distributed in the cross section of the tower 1; the second reticular tube 11 comprises a plurality of reaction branch tubes 12, and the axes of the reaction branch tubes 12 are mutually parallel and are mutually uniformly arranged at intervals; the adjacent reaction branch pipes 12 are communicated with each other, a plurality of release holes 13 are formed in the reaction branch pipe 12, and the release holes 13 are uniformly arranged at intervals along the axis direction of the reaction branch pipe 12; the number of the second mesh pipes 11 is two, and the second mesh pipes are respectively positioned at the upper side and the lower side of the first mesh pipe 7; the release holes 13 of the reaction branch pipes 12 above the first reticular pipes 7 are downward, so that the possibility that sediment is located in the reaction branch pipes 12 above is reduced; the release holes 13 of the reaction branch pipes 12 below the first reticular pipes 7 are upward, so that the chemical substances can react with the flue gas quickly after flowing out.
Referring to fig. 2 and 3, the side wall of the conveying branch pipe 8 is welded with a plurality of supporting bars 29, the supporting bars 29 are uniformly distributed on two sides of the conveying branch pipe 8, the supporting bars 29 are welded with folded plates 10 connected with the supporting bars 29 on the same conveying branch pipe 8, the length direction of the folded plates 10 is parallel to the length direction of the conveying branch pipe 8, and the folded plates 10 are positioned below the air holes 9; the cross section of the folded plate 10 is in an inverted V shape, so that flue gas can uniformly overflow along the upper surface of the folded plate 10 after exiting from the air hole 9, and is uniformly distributed in flue gas and liquid, and the possibility that impurities enter the conveying branch pipe 8 is reduced.
Referring to fig. 1 and 2, the first mesh tube 7 and the second mesh tube 11 are both rotatably connected to the inner wall of the tower body 1, and the rotation axes of the first mesh tube 7 and the second mesh tube 11 are horizontally arranged and perpendicular to the length direction of the conveying branch tube 8; both ends of the conveying branch pipe 8 and the reaction branch pipe 12 are provided with openings, the first reticular pipe 7 and the second reticular pipe 11 can rotate in liquid, and the effect that sediment positioned in the conveying branch pipe 8 and the reaction branch pipe 12 is convenient to discharge is realized; bendable and telescopic bent pipes 14 are welded between the conveying pipe 3 and the first net-shaped pipe 7 and between the reaction pipe 5 and the second net-shaped pipe 11, so that interference phenomenon of the first net-shaped pipe 7 and the second net-shaped pipe 11 during rotation is avoided; the inner wall of the tower body 1 is provided with three limiting rings 15 for limiting the rotation angles of the first reticular tube 7 and the second reticular tube 11, and the limiting rings 15 are respectively positioned at the lower sides of the first reticular tube 7 and the second reticular tube 11.
Referring to fig. 1 and 2, a clean water pipe 16 for cleaning the conveying branch pipe 8 is welded on the inner side wall of the tower body 1, and the clean water pipe 16 is positioned below the conveying branch pipe 8 and above the lower reaction branch pipe 12; a plurality of evenly distributed cleaning spray heads 17 are connected to the impurity cleaning water pipe 16 through threads, and the cleaning spray heads 17 can spray water upwards; the cleaning spray head 17 can play a role in cleaning the inside of the tower body 1 when the tower body 1 does not work, or can be beneficial to realizing the cooling effect on liquid by introducing cold water when the tower body 1 works.
Referring to fig. 1, two bearing plates 18 located above the liquid level are welded on the inner wall of the tower body 1, the bearing plates 18 can enable flue gas to flow through, the two bearing plates 18 are horizontally arranged, the bearing plate 18 located below is close to the liquid level, and the amount of liquid in the tower body 1 is continuously changed, so that the bearing plate 18 located below can be submerged below the liquid level; a plurality of small balls 19 are arranged between the two bearing plates 18, and the small balls 19 are filled to be half full between the two bearing plates 18, so that the speed of overflowing the flue gas from the liquid is reduced, and the flue gas is enabled to react more fully in the liquid.
Referring to fig. 1, 2 and 4, the inner wall of the tower body 1 is provided with a plurality of collecting strips 20 positioned between a lower bearing plate 18 and an upper reaction branch pipe 12, the collecting strips 20 are welded on the inner wall of the tower body 1, and the collecting strips 20 are horizontally arranged; a plurality of collecting boxes 21 are arranged on the collecting lath 20 in a sliding manner, the collecting boxes 21 slide along the length direction of the collecting lath 20, and sliding connection between the collecting boxes 21 and the collecting plates can be realized through dovetail grooves and dovetail blocks; the side wall of the collecting box 21 is provided with a plurality of collecting holes 28 for collecting sediment, the collecting box 21 is welded with a top plate 22 positioned above the collecting box 21, the cross section of the top plate 22 is in an inverted V shape, and the top plate 22 covers the collecting box 21 under the orthographic projection; adjacent collecting boxes 21 positioned on the same collecting lath 20 can be connected by steel ropes, clamps and the like, so that the tower body 1 can be conveniently taken out; the outer side wall of the tower body 1 is rotatably connected with a plurality of tower doors 23 for opening the tower body 1, and the tower doors 23 are communicated with the inside of the tower body 1 and correspond to the collecting battens 20 one by one; the collection box 21 can be taken out through the tower door 23.
In order to reduce the blockage of the first reticular pipe 7 and the second reticular pipe 11 caused by the sediment, a collecting box 21 is arranged above the conveying branch pipe 8, the sediment drives the sediment to rise along the rising smoke and touch the top plate 22, and the sediment is accumulated in the collecting box 21 along the lower surface of the top plate 22; when the operation of the tower body 1 is stopped, the collecting box 21 can be taken out of the tower door 23, so that cleaning is realized.
Referring to fig. 1 and 2, the bottom plate of the tower body 1 is inclined, the side wall of the tower body 1 is welded with an output pipe 24 communicated with the interior of the tower body 1, and the output pipe 24 is positioned below the lower reaction branch pipe 12; the output pipe 24 is used for realizing liquid replacement, keeping the balance of the liquid level in the tower body 1 and discharging sediment, and the sediment accumulated on the bottom plate of the tower body 1 is discharged along the inclined surface of the bottom plate.
Referring to fig. 1 and 2, the inner wall of the tower body 1 is provided with three spraying components 2, the three spraying components 2 are all positioned above the liquid level, the spraying components 2 comprise spraying water pipes 26 welded on the inner side wall of the tower body 1, the spraying water pipes 26 are horizontally arranged and uniformly cover the cross section of the tower body 1, and a plurality of spraying nozzles 27 which are uniformly distributed are connected on the spraying water pipes 26 in a threaded manner; in the spray assembly 2 from top to bottom, the spray nozzles 27 on the uppermost and middle spray pipes 26 spray liquid downwards, and the spray nozzles 27 on the lowermost spray pipe 26 spray liquid upwards; the tower body 1 inside wall welding has the dull and stereotyped defroster 25 that is located between centre and the below shower pipe 26, and dull and stereotyped defroster 25 can be used to evenly distribute the flue gas again for the liquid in the shower nozzle 27 can be better contact flue gas.
The embodiment of the application relates to a desulfurization, denitrification and decarbonization device for coal-fired flue gas, which comprises the following implementation principles: the flue gas enters the conveying branch pipe 8 through the conveying pipe 3 to realize uniform distribution in the liquid, the chemical substances enter the reaction branch pipe 12 through the reaction pipe 5 to realize uniform distribution, the flue gas flows out through the folded plate 10, and the precipitate generated by the reaction of the flue gas and the liquid enters the collecting box 21 or is output through the output pipe 24; after passing through the two bearing plates 18, the eyes can be further cleaned and reacted by the spraying assembly 2, the smoke is uniformly distributed again through the flat plate demister 25, and finally the smoke is discharged out of the tower body 1 through the two layers of spraying assemblies 2 positioned above.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (4)
1. The utility model provides a coal-fired flue gas desulfurization denitration decarbonization device, is equipped with tower body (1) of liquid including inside, and tower body (1) inside is provided with a plurality of spray assemblies (2) that are located above the liquid level, its characterized in that: the conveying pipe (3) is arranged on the outer side wall of the tower body (1) and penetrates into the liquid in the inner cavity of the tower body (1), the inner wall of the tower body (1) is provided with dispersing components (4) which enable the flue gas to be uniformly distributed, and the dispersing components (4) are communicated with the conveying pipe (3); the chemical substance adding device comprises a tower body (1), a plurality of reaction tubes (5) which are arranged on the outer side wall of the tower body (1) and extend into the inner cavity of the tower body (1), wherein the inner wall of the tower body (1) is provided with a distribution assembly (6) which is communicated with the corresponding reaction tubes (5) and enables the chemical substances to be uniformly distributed;
the dispersing assembly (4) comprises first net-shaped pipes (7) which are arranged on the inner wall of the tower body (1) and are uniformly distributed on the cross section of the tower body (1), the first net-shaped pipes (7) comprise a plurality of conveying branch pipes (8) which are mutually parallel, and the conveying branch pipes (8) are mutually communicated; a plurality of air holes (9) are uniformly formed in one side, deviating from the liquid level, of the conveying branch pipe (8), a folded plate (10) for enabling gas to be distributed more uniformly is arranged on the outer side wall of the conveying branch pipe (8), the folded plate (10) is positioned below the air holes (9) corresponding to the conveying branch pipe (8), and the cross section of the folded plate (10) is in an inverted V shape;
the distribution assembly (6) comprises second net-shaped pipes (11) which are arranged on the inner wall of the tower body (1) and are uniformly distributed on the cross section of the tower body (1), the second net-shaped pipes (11) comprise a plurality of reaction branch pipes (12) which are mutually parallel, and the reaction branch pipes (12) are mutually communicated; the second reticular tube (11) is arranged on the upper side and the lower side of the first reticular tube (7); a plurality of release holes (13) are formed in each reaction branch pipe (12), the release holes (13) of the reaction branch pipes (12) above the first mesh pipes (7) face the first mesh pipes (7), and the release holes (13) of the reaction branch pipes (12) below the first mesh pipes (7) face the first mesh pipes (7);
the first reticular tube (7) and the second reticular tube (11) are both rotationally connected to the inner wall of the tower body (1), the rotation axes of the first reticular tube (7) and the second reticular tube (11) are perpendicular to the length direction of the corresponding conveying branch tube (8) or reaction branch tube (12), and the ends of the conveying branch tube (8) and the reaction branch tube (12) are both arranged in an opening manner; the joint of the first reticular tube (7) and the conveying tube (3) and the joint of the second reticular tube (11) and the reaction tube (5) are respectively provided with a bendable and telescopic bent tube (14); the inner wall of the tower body (1) is also fixed with a plurality of limiting rings (15) for limiting the rotation angles of the first reticular tube (7) and the second reticular tube (11), and the first reticular tube (7) and the second reticular tube (11) incline when rotating along the rotation axes;
the inner wall of the tower body (1) is provided with a impurity-removing water pipe (16) positioned below the first mesh pipe (7), the impurity-removing water pipe (16) is positioned between the first mesh pipe (7) and the reaction branch pipe (12), and a cleaning spray head (17) for spraying liquid to the first mesh pipe (7) is arranged on the impurity-removing water pipe (16);
two bearing plates (18) capable of circulating smoke above the liquid level are arranged on the inner wall of the tower body (1), the two bearing plates (18) are positioned below the spray assemblies (2), and a plurality of pellets (19) for reducing the flow rate of the smoke are arranged between the two bearing plates (18);
the inner wall of the tower body (1) is provided with a collecting lath (20), and the collecting lath (20) is positioned between the upper reaction branch pipe (12) and the lower bearing plate (18); a plurality of collecting boxes (21) are arranged on the collecting lath (20) in a sliding manner, the adjacent collecting boxes (21) are connected with each other, a plurality of collecting holes (28) are formed in the side wall of each collecting box (21), a top plate (22) positioned above the collecting box (21) is fixed on the side wall of each collecting box (21), and the cross section of each top plate (22) is in an inverted V shape; the side wall of the tower body (1) is provided with a plurality of tower doors (23) which are used for being communicated with the inner cavity of the tower body (1), and each collecting slat (20) corresponds to one tower door (23).
2. The desulfurization, denitrification and decarbonization device for coal-fired flue gas according to claim 1, wherein: the bottom plate of the tower body (1) is obliquely arranged; the outer side wall of the tower body (1) is provided with an output pipe (24) for communicating the inside of the tower body (1) to realize liquid discharge, and the output pipe (24) is positioned below the lower reaction branch pipe (12).
3. The desulfurization, denitrification and decarbonization device for coal-fired flue gas according to claim 1, wherein: the inner wall of the tower body (1) is provided with a flat plate demister (25) positioned between the spraying components (2).
4. A coal-fired flue gas desulfurization, denitrification and decarbonization device according to claim 3, wherein: the spray assembly (2) comprises a spray pipe (26) fixed on the inner wall of the tower body (1), and a plurality of spray nozzles (27) are arranged on the spray pipe (26).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210777831.4A CN114939336B (en) | 2022-07-04 | 2022-07-04 | Desulfurization, denitrification and decarbonization device for coal-fired flue gas |
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|---|---|---|---|
| CN202210777831.4A CN114939336B (en) | 2022-07-04 | 2022-07-04 | Desulfurization, denitrification and decarbonization device for coal-fired flue gas |
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| CN114939336B true CN114939336B (en) | 2023-09-19 |
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