CN112933838A - Desulfurization and denitrification composite dedusting flue gas filtering device and filtering method thereof - Google Patents
Desulfurization and denitrification composite dedusting flue gas filtering device and filtering method thereof Download PDFInfo
- Publication number
- CN112933838A CN112933838A CN202110162026.6A CN202110162026A CN112933838A CN 112933838 A CN112933838 A CN 112933838A CN 202110162026 A CN202110162026 A CN 202110162026A CN 112933838 A CN112933838 A CN 112933838A
- Authority
- CN
- China
- Prior art keywords
- desulfurization
- absorbent
- pipe
- denitration
- flue gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
-
- 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
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/507—Sulfur oxides by treating the gases with other liquids
-
- 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
-
- 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
- B01D53/86—Catalytic processes
- B01D53/8603—Removing sulfur compounds
- B01D53/8609—Sulfur oxides
-
- 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
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
-
- 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
- B01D53/86—Catalytic processes
- B01D53/869—Multiple step processes
-
- 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
Abstract
The invention discloses a desulfurization and denitrification composite dedusting flue gas filtering device and a filtering method thereof, relates to the technical field of flue gas treatment, and aims to solve the problem that the existing desulfurization and denitrification dedusting flue gas filtering device has a single filtering means in the use process. The lower extreme of absorbent injection case one side is provided with into tobacco pipe, injection apparatus is installed to the inside upper end of absorbent injection case, the opposite side of absorbent injection case is provided with separator, separator's inner wall fixed mounting has the dust collecting plate, one side of separator is provided with the denitration desulfurizing tower, the inside of denitration desulfurizing tower is provided with washing chamber and filter chamber respectively, and the filter chamber is located the top of washing chamber, the inside of washing chamber is provided with first aeration pipe, the below of first aeration pipe is provided with the second aeration pipe, the inside of filter chamber is provided with desulfurization catalyst and denitration catalyst respectively, one side of the upper end of denitration desulfurizing tower is provided with the blast pipe.
Description
Technical Field
The invention relates to the technical field of flue gas treatment, in particular to a desulfurization and denitrification composite dedusting flue gas filtering device and a filtering method thereof.
Background
Desulfurization and denitrification are one of important technical measures for preventing and treating air pollution, in 2011, in 11 months, a website of Ministry of environmental protection issues a newly revised emission standard of air pollution of thermal power plants jointly issued by Ministry of environmental protection of national Bai and the State administration of quality supervision, inspection and quarantine, and the new standard is implemented from 2012, 1 month and 1 day. Since 2003, the emission standard of the atmospheric pollutants of the thermal power plant is updated for the first time by the environmental protection ministry, and the current desulfurization methods generally comprise three methods, namely desulfurization before combustion, desulfurization during combustion and desulfurization after combustion. With the development of industry and the improvement of living standard of people, the desire for energy is continuously increased, and SO2 in the coal-fired flue gas becomes a main cause of air pollution. The reduction of SO2 pollution is a urgent issue in the current atmospheric environmental management.
However, the existing dedusting flue gas filtering device related to desulfurization and denitrification has a single filtering means in the using process, and due to the fact that the content of substances in flue gas is various and complex, the single treatment effect is poor, and the blockage phenomenon caused by dirt is easy to occur in equipment, the existing requirements are not met, and the composite dedusting flue gas filtering device related to desulfurization and denitrification and the filtering method thereof are provided.
Disclosure of Invention
The invention aims to provide a desulfurization and denitrification composite dedusting flue gas filtering device and a filtering method thereof, and aims to solve the problem that the filtering means of the desulfurization and denitrification composite dedusting flue gas filtering device is single in the using process.
In order to achieve the purpose, the invention provides the following technical scheme: a desulfurization and denitrification composite dedusting smoke filtering device and a filtering method thereof comprise an absorbent injection box, wherein a smoke inlet pipe is arranged at the lower end of one side of the absorbent injection box, an injection device is arranged at the upper end of the inside of the absorbent injection box, a separating device is arranged at the other side of the absorbent injection box, a dust collecting plate is fixedly arranged on the inner wall of the separating device, a denitrification and desulfurization tower is arranged at one side of the separating device, a washing cavity and a filtering cavity are respectively arranged inside the denitrification and desulfurization tower, the filtering cavity is positioned above the washing cavity, a first aeration pipe is arranged inside the washing cavity, a second aeration pipe is arranged below the first aeration pipe, the first aeration pipe and the second aeration pipe are vertically distributed, a desulfurization catalyst and a denitrification catalyst are respectively arranged inside the filtering cavity, and the denitrification catalyst is positioned above the desulfurization catalyst, and an exhaust pipe is arranged on one side of the upper end of the denitration and desulfurization tower.
Preferably, the rear end of absorbent injection case is provided with air compressor, and air compressor passes through the gas-supply pipe with injection apparatus and seals fixedly, air compressor's top is provided with the absorbent storage tank, and absorbent storage tank passes through the absorbent conveyer pipe with injection apparatus and seals fixedly, the gas-supply pipe is located the inside one end of injection apparatus and is provided with the high voltage static corona charging district, the inside one side fixed mounting of absorbent injection case has the filter screen.
Preferably, a first connecting pipe is fixed between the separating device and the absorbent injection box in a sealing manner, an air pump is fixedly installed outside the first connecting pipe, an ionization plate is installed inside the first connecting pipe and matched with a dust collecting plate, and a collecting hopper is fixedly arranged at the lower end of the separating device.
Preferably, a pressure pump is arranged on one side of the denitration and desulfurization tower, one end of the pressure pump and the separation device are sealed and fixed through a second connecting pipe, the other end of the pressure pump is sealed and fixed with the first aeration pipe, a solution tank is arranged on the other side of the denitration and desulfurization tower and communicated with the washing cavity, a first circulating pump is arranged at the upper end of the solution tank, a liquid collecting disc is fixedly arranged at the upper end of the washing cavity, a plurality of atomizing nozzles are arranged at the lower end of the liquid collecting disc in an annular array, and the upper end of the liquid collecting disc and the first circulating pump are sealed and fixed through a pipeline.
Preferably, an air inlet hole is formed between the washing cavity and the filtering cavity, a second circulating pump is arranged at the rear end of the denitration and desulfurization tower, one end of the second circulating pump is fixed with the second aeration pipe in a sealing mode, a third connecting pipe is arranged at the upper end of the second circulating pump, the third connecting pipe extends to the inside of the air inlet hole, and air nozzles are arranged at the upper ends of the first aeration pipe and the second aeration pipe.
Preferably, the desulfurization catalyst and the denitration catalyst are fixed with the denitration and desulfurization tower through clamping grooves.
Preferably, the upper and lower sides of desulfurization catalyst and denitration catalyst all are provided with the division board, the inside of division board is provided with the cavity, and the cavity is provided with two, the upper and lower side of cavity all is the rectangle array and has seted up a plurality of through-holes, and the through-hole all is not in same vertical line.
The filtering method of the desulfurization and denitrification composite dedusting flue gas filtering device comprises the following steps:
firstly, flue gas to be treated enters an absorbent injection box through a smoke inlet pipe, an air compressor and a power supply of a high-voltage electrostatic corona charging area are started, the air compressor conveys high-pressure gas to an injection device positioned in the absorbent injection box through a gas conveying pipe, the absorbent passes through an absorbent conveying pipe and is injected through the injection device, then the absorbent flows through the high-voltage electrostatic corona charging area at a high speed, so that the absorbent is electrostatically charged, the absorbent is mutually repelled due to the same charge, the surface is fully exposed, and the reaction efficiency with the flue gas is accelerated;
secondly, accelerating and conveying the flue gas subjected to preliminary adsorption into a separating device through a first connecting pipe, electrifying an electrode of an ionization plate in the conveying process to enable tiny dust in the flue gas to collide with positive and negative ions and electrons between the electrodes to form electric charge, throwing dust particles with density larger than that of the gas to the inner wall by centrifugal force generated in the rotating process of the flue gas after the flue gas enters the separating device, so that the dust particles enter a collecting hopper, separating most of large-particle dust in upward cyclone, and simultaneously moving the dust particles with the electrons and the ions to an opposite electrode under the action of electric field force in the rotating process and gradually accumulating the dust particles on a dust collecting plate to finish impurity separation;
thirdly, enabling the gas to enter a first aeration pipe under the pressurization of a pressurization pump, enabling sulfur dioxide in the flue gas to react with hydrogen in water to generate a thiosulfuric acid complex, enabling the gas to rise after contacting with the citric acid solution, meanwhile, conveying the citric acid solution in the solution tank to a liquid collecting disc under the action of a first circulating pump, spraying downwards again through an atomizing nozzle to form secondary adhesion, then starting a second circulating pump to convey a part of gas entering a filter cavity through an air inlet hole to a second aeration pipe through a third connecting pipe, and repeating the process to react again;
fourthly, carrying out final reaction and filtration on harmful substances in the flue gas through a denitration catalyst and a desulfurization catalyst;
and step five, discharging the filtered smoke through an exhaust pipe.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention is provided with the absorbent injection box, the flue gas to be treated firstly enters the absorbent injection box through the smoke inlet pipe, the air compressor and the power supply of the high-voltage electrostatic corona charging area are started, the air compressor pressurizes the external air, the high-voltage gas is conveyed to the injection device positioned in the absorbent injection box through the gas conveying pipe, the absorbent in the absorbent storage tank takes the air compressed by the air compressor as the power, the absorbent is injected out through the absorbent conveying pipe and the injection device through the negative pressure formed in the injection device by the high-speed motion of the airflow at the nozzle of the injection device, so that the absorbent flows through the high-voltage electrostatic corona charging area at high speed, the absorbent is provided with electrostatic charges, when the absorbent is injected into the flue gas flow, the absorbent is mutually repelled due to the same charges, the surface is fully exposed, and the desulfurization efficiency is greatly improved, by the method, waste water and waste residues are not generated, and byproducts can also be used as fertilizers without generating secondary pollutants.
2. The invention is provided with a separating device, under the action of an air pump, flue gas which is preliminarily adsorbed is accelerated and conveyed into the separating device through a first connecting pipe, in the conveying process, an ionization plate electrode is electrified, so that tiny foreign dust in the flue gas collides with positive and negative ions and electrons between the electrodes to form charged electricity, the flue gas enters the separating device along the tangential direction of the separating device, air flow changes from linear motion into circular motion, rotating air flow spirally flows downwards from a cylindrical barrel along the inner wall and flows towards a cone, the flue gas generates centrifugal force in the rotating process, dust particles with density larger than that of the gas are thrown to the inner wall, once the dust particles are contacted with the inner wall, the dust particles lose inertia force and fall along the wall surface by virtue of the momentum of inlet speed and downward gravity, so as to enter a collecting hopper, the outer rotating and descending air flow continuously into the central part of the separating device in the descending process, an internal rotational flow rotating upwards is formed, most of large-particle dust in the upward rotational flow is separated under the density difference, and meanwhile, dust particles with electrons and ions move to the opposite electrode under the action of an electric field force in the rotating process and are gradually accumulated on the dust collecting plate, so that the dust particles in the rising gas are further reduced to the minimum.
3. The invention is characterized in that a washing cavity is arranged in the denitration and desulfurization tower, gas enters a first aeration pipe under the pressurization of a pressurization pump, and is sprayed in a citric acid solution at the bottom of the washing cavity through an air nozzle, the citric acid (H3C6H5O 7. H2O) solution has better buffer performance, when the sulfur dioxide gas passes through the citrate liquid, sulfur dioxide in flue gas reacts with hydrogen in water to generate a thiosulfuric acid complex, the sulfur dioxide absorption rate is up to 90%, the gas contacted with the citric acid solution rises later, simultaneously under the action of a first circulating pump, the citric acid solution in a solution tank is conveyed to a liquid collecting tray, and is sprayed downwards again through an atomizing spray head to form secondary adhesion so as to improve the reaction effect, and then a second circulating pump is started to convey a part of gas entering a filter cavity through an air inlet hole to a second aeration pipe through a third connecting pipe, the above process is repeated to carry out the reaction again, and in this way, the sulfur dioxide in the gas is purified more finely.
4. The denitration catalyst and the desulfurization catalyst are respectively arranged in the filter cavity, the denitration catalyst is an efficient composite oxidation catalyst, is non-toxic and free of secondary pollution, can oxidize nitric oxide into nitrogen dioxide in a wider and lower temperature range (room temperature to below 300 ℃), can effectively remove heavy metal mercury elements synchronously, realizes the synergistic control of multiple pollutants integrating desulfurization, denitration, demercuration and dust removal, and sulfur dioxide in flue gas is oxidized into sulfur trioxide and is reacted and cured into calcium sulfate when the flue gas passes through the desulfurization catalyst.
5. According to the invention, the partition plates are arranged above and below the denitration catalyst and the desulfurization catalyst, the two cavities are arranged in the partition plates, the through holes are communicated with the upper end and the lower end of the cavities, the through holes are not in the same straight line, and when gas enters the partition plates, the gas can enter the upper parts of the cavities through complex movement, so that the reaction time of the gas in the denitration catalyst and the desulfurization catalyst is prolonged, and the reaction effect is further improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a side view showing the internal structure of the absorbent injection box of the present invention;
FIG. 3 is a schematic view of the internal structure of the spraying device of the present invention;
FIG. 4 is a side view of the internal structure of a denitration and desulfurization tower of the present invention;
fig. 5 is a partially enlarged view of the area a in fig. 1 according to the present invention.
In the figure: 1. an absorbent spray box; 2. a separation device; 3. a denitration desulfurization tower; 4. a solution tank; 5. a smoke inlet pipe; 6. an exhaust pipe; 7. an injection device; 8. a gas delivery pipe; 9. an absorbent delivery tube; 10. filtering with a screen; 11. a first connecting pipe; 12. an air pump; 13. an ionization plate; 14. a dust collecting plate; 15. a collecting hopper; 16. a second connecting pipe; 17. a pressure pump; 18. a first aeration pipe; 19. an air tap; 20. a second aeration pipe; 21. a washing chamber; 22. a liquid collecting tray; 23. an atomizing spray head; 24. a filter chamber; 25. a desulfurization catalyst; 26. a denitration catalyst; 27. a separator plate; 28. a first circulation pump; 29. an air compressor; 30. an absorbent storage tank; 31. a high voltage electrostatic corona charging region; 32. an air inlet hole; 33. a third connecting pipe; 34. a second circulation pump; 35. a cavity; 36. and a through hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-5, an embodiment of the present invention is shown: a desulfurization and denitrification composite dedusting smoke filtering device and a filtering method thereof comprise an absorbent injection box 1, wherein the lower end of one side of the absorbent injection box 1 is provided with a smoke inlet pipe 5, the upper end inside the absorbent injection box 1 is provided with an injection device 7, the other side of the absorbent injection box 1 is provided with a separating device 2, the inner wall of the separating device 2 is fixedly provided with a dust collecting plate 14, one side of the separating device 2 is provided with a denitrification and desulfurization tower 3, the denitrification and desulfurization tower 3 is internally provided with a washing cavity 21 and a filtering cavity 24 respectively, the filtering cavity 24 is positioned above the washing cavity 21, the washing cavity 21 is internally provided with a first aeration pipe 18, the lower part of the first aeration pipe 18 is provided with a second aeration pipe 20, the first aeration pipe 18 and the second aeration pipe 20 are vertically distributed, the inside of the filtering cavity 24 is provided with a desulfurization catalyst 25 and a denitrification catalyst 26 respectively, and the denitrification catalyst 26 is positioned above the desulfurization catalyst 25, an exhaust pipe 6 is arranged on one side of the upper end of the denitration and desulfurization tower 3.
Further, an air compressor 29 is arranged at the rear end of the absorbent injection box 1, the air compressor 29 and the injection device 7 are fixed in a sealing mode through an air conveying pipe 8, an absorbent storage tank 30 is arranged above the air compressor 29, the absorbent storage tank 30 and the injection device 7 are fixed in a sealing mode through an absorbent conveying pipe 9, a high-voltage electrostatic corona charging area 31 is arranged at one end, located inside the injection device 7, of the air conveying pipe 8, a filter screen 10 is fixedly installed on one side inside the absorbent injection box 1, the absorbent inside the absorbent storage tank 30 takes the air compressed by the air compressor 29 as power, the absorbent is ejected out through the absorbent conveying pipe 9 and the injection device 7 through negative pressure formed in the injection device 7 through high-speed movement of air flow at a nozzle of the injection device 7, and then the absorbent flows through the high-voltage electrostatic corona charging area 31 at high speed, so that the absorbent is charged with static charges, when the absorbent is sprayed into the flue gas flow, the absorbent is mutually repelled due to the same charge, the surface is fully exposed, and the desulfurization efficiency is greatly improved.
Further, a first connecting pipe 11 is fixed between the separating device 2 and the absorbent injection box 1 in a sealing manner, an air pump 12 is fixedly installed outside the first connecting pipe 11, an ionization plate 13 is installed inside the first connecting pipe 11, the ionization plate 13 is matched with a dust collecting plate 14, a collecting hopper 15 is fixedly arranged at the lower end of the separating device 2, electrodes of the ionization plate 13 are electrified, so that tiny foreign dust in the smoke collides with positive and negative ions and electrons between the electrodes to form charge, the smoke enters the separating device 2 along the tangential direction of the separating device 2, the airflow is changed from linear motion into circular motion, the rotating airflow spirally flows downwards from the cylindrical barrel along the inner wall and flows towards the cone, the smoke generates centrifugal force in the rotating process, dust particles with density larger than that of the gas are thrown to the inner wall, once the dust particles are contacted with the inner wall, the inertia force is lost, and the momentum of the inlet speed and the downward gravity fall along the wall surface, and then the outer cyclone air flow which rotates and descends enters the collecting hopper 15 continuously flows into the central part of the separating device 2 in the descending process to form an inner cyclone which rotates upwards, most of large-particle dust in the upward cyclone is separated under the density difference, and meanwhile, dust particles with electrons and ions move to the opposite electrode under the action of the electric field force in the rotating process and are gradually accumulated on the dust collecting plate 14.
Further, one side of the denitration and desulfurization tower 3 is provided with a pressure pump 17, one end of the pressure pump 17 is hermetically fixed with the separation device 2 through a second connecting pipe 16, the other end of the pressure pump 17 is hermetically fixed with a first aeration pipe 18, the other side of the denitration and desulfurization tower 3 is provided with a solution tank 4, the solution tank 4 is communicated with the washing cavity 21, the upper end of the solution tank 4 is provided with a first circulating pump 28, the upper end of the washing cavity 21 is fixedly provided with a liquid collecting disc 22, the lower end of the liquid collecting disc 22 is provided with a plurality of atomizing nozzles 23 in an annular array, the upper end of the liquid collecting disc 22 is fixed with the first circulating pump 28 in a sealing way through a pipeline, the citric acid (H3C6H5O 7. H2O) solution has better buffering performance, when the sulfur dioxide gas passes through the citrate liquid, the sulfur dioxide in the flue gas reacts with hydrogen in water to generate a thiosulfuric acid complex, and the absorption rate of the sulfur dioxide is up to 90%.
Further, be provided with air inlet 32 between washing chamber 21 and the filter chamber 24, the rear end of denitration desulfurizing tower 3 is provided with second circulating pump 34, and the one end of second circulating pump 34 is sealed fixed with second aeration pipe 20, the upper end of second circulating pump 34 is provided with third connecting pipe 33, and third connecting pipe 33 extends to the inside of air inlet 32, and first aeration pipe 18 all is provided with air cock 19 with the upper end of second aeration pipe 20, through this kind of mode, purify the sulfur dioxide in the gas more meticulously.
Further, the desulfurization catalyst 25 and the denitration catalyst 26 are both fixed with the denitration and desulfurization tower 3 through the clamping grooves, the denitration catalyst 26 is a high-efficiency composite oxidation catalyst, is non-toxic and free of secondary pollution, can oxidize nitric oxide into nitrogen dioxide in a wide and low-temperature range, can also effectively remove heavy metal mercury elements synchronously, realize the multi-pollutant cooperative control of the integration of desulfurization, denitration, demercuration and dust removal, when flue gas passes through the desulfurization catalyst 25, sulfur dioxide in the flue gas is oxidized into sulfur trioxide and is reacted and cured into calcium sulfate, the flue gas is insensitive to certain fluctuation of flue gas conditions in a short time, and is also insensitive to flue gas temperature, and the applicability is wide.
Further, desulfurization catalyst 25 all is provided with division board 27 with denitration catalyst 26's upper and lower side, division board 27's inside is provided with cavity 35, and cavity 35 is provided with two, cavity 35's upper and lower side all is the rectangle array and has seted up a plurality of through-holes 36, and through-hole 36 all is not in on the same vertical line, in gaseous entering division board 27, need just can get into the top through complicated motion, thereby the reaction time of gas in denitration catalyst 26 and desulfurization catalyst 25 has been increased, reaction effect has further been improved.
The filtering method of the desulfurization and denitrification composite dedusting flue gas filtering device comprises the following steps:
firstly, flue gas to be treated enters an absorbent injection box 1 through a smoke inlet pipe 5, a power supply of an air compressor 29 and a high-voltage electrostatic corona charging area 31 is started, the air compressor 29 conveys high-voltage gas to an injection device 7 positioned in the absorbent injection box 1 through a gas conveying pipe 8, and an absorbent passes through an absorbent conveying pipe 9 and is injected through the injection device 7, so that the absorbent flows through the high-voltage electrostatic corona charging area 31 at a high speed, the absorbent is charged with electrostatic charges, the absorbent is mutually repelled due to the same charges, the surface is fully exposed, and the reaction efficiency with the flue gas is accelerated;
secondly, the flue gas after primary adsorption is accelerated and conveyed into a separating device 2 through a first connecting pipe 11, electrodes of an ionization plate 13 are electrified in the conveying process, so that tiny dust in the flue gas collides with positive and negative ions and electrons between the electrodes to form charge, after the flue gas enters the separating device 2, the centrifugal force generated in the rotating process of the flue gas throws dust particles with density larger than that of the gas to the inner wall, the dust particles enter a collecting hopper, most of large-particle dust in upward cyclone flow is separated, and meanwhile, the dust particles with the electrons and the ions move to an opposite electrode under the action of electric field force in the rotating process and are gradually deposited on a dust collecting plate 14 to complete impurity separation;
thirdly, the gas enters the first aeration pipe 18 under the pressurization of the pressurization pump 17, sulfur dioxide in the flue gas reacts with hydrogen in water to generate a thiosulfuric acid complex, the gas contacted with the citric acid solution rises subsequently, meanwhile, under the action of the first circulating pump 28, the citric acid solution in the solution tank 4 is conveyed to the liquid collecting disc 22, the gas is sprayed downwards again through the atomizing nozzle 23 to form secondary adhesion, then the second circulating pump 34 is started to convey a part of the gas entering the filter cavity 24 through the air inlet 32 to the second aeration pipe 20 through the third connecting pipe 33, and the process is repeated for reaction again;
fourthly, carrying out final reaction and filtration on harmful substances in the flue gas through the denitration catalyst 26 and the desulfurization catalyst 25;
and step five, discharging the filtered smoke through an exhaust pipe 6.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. The utility model provides a compound dust removal flue gas filter equipment of SOx/NOx control, includes absorbent injection case (1), its characterized in that: the denitration and desulfurization device comprises an absorbent injection box (1), a smoke inlet pipe (5) is arranged at the lower end of one side of the absorbent injection box (1), an injection device (7) is installed at the upper end of the interior of the absorbent injection box (1), a separation device (2) is arranged at the other side of the absorbent injection box (1), a dust collecting plate (14) is fixedly installed on the inner wall of the separation device (2), a denitration and desulfurization tower (3) is arranged at one side of the separation device (2), a washing chamber (21) and a filtering chamber (24) are respectively arranged in the denitration and desulfurization tower (3), the filtering chamber (24) is positioned above the washing chamber (21), a first aeration pipe (18) is arranged in the washing chamber (21), a second aeration pipe (20) is arranged below the first aeration pipe (18), the first aeration pipe (18) and the second aeration pipe (20) are vertically distributed, a desulfurization catalyst (25) and a denitration catalyst (26) are respectively arranged in the filtering chamber (24), and the denitration catalyst (26) is positioned above the desulfurization catalyst (25), and one side of the upper end of the denitration and desulfurization tower (3) is provided with an exhaust pipe (6).
2. The desulfurization and denitrification composite dedusting smoke filter device according to claim 1, which is characterized in that: the rear end of absorbent injection case (1) is provided with air compressor (29), and air compressor (29) and injection apparatus (7) are sealed fixed through air-supply pipe (8), the top of air compressor (29) is provided with absorbent storage tank (30), and absorbent storage tank (30) and injection apparatus (7) are sealed fixed through absorbent conveyer pipe (9), the one end that air-supply pipe (8) are located injection apparatus (7) inside is provided with high voltage static corona charging district (31), one side fixed mounting of absorbent injection case (1) inside has filter screen (10).
3. The desulfurization and denitrification composite dedusting smoke filter device according to claim 1, which is characterized in that: a first connecting pipe (11) is fixed between the separating device (2) and the absorbent injection box (1) in a sealing mode, an air pump (12) is fixedly installed outside the first connecting pipe (11), an ionization plate (13) is installed inside the first connecting pipe (11), the ionization plate (13) is matched with a dust collecting plate (14), and a collecting hopper (15) is fixedly arranged at the lower end of the separating device (2).
4. The desulfurization and denitrification composite dedusting smoke filter device according to claim 1, which is characterized in that: one side of denitration desulfurizing tower (3) is provided with force (17), and the one end of force (17) and separator (2) are sealed fixed through second connecting pipe (16), the other end and first aeration pipe (18) of force (17) are sealed fixed, the opposite side of denitration desulfurizing tower (3) is provided with solution tank (4), and solution tank (4) are linked together with washing chamber (21), the upper end of solution tank (4) is provided with first circulating pump (28), the upper end of washing chamber (21) is fixed and is provided with drip pan (22), the lower extreme of drip pan (22) is the annular array and has seted up a plurality of atomizer (23), the upper end and first circulating pump (28) of drip pan (22) are sealed fixed through the pipeline.
5. The desulfurization and denitrification composite dedusting smoke filter device according to claim 1, which is characterized in that: be provided with air inlet (32) between washing chamber (21) and filter chamber (24), the rear end of denitration desulfurizing tower (3) is provided with second circulating pump (34), and the one end and the second aeration pipe (20) of second circulating pump (34) are sealed fixed, the upper end of second circulating pump (34) is provided with third connecting pipe (33), and third connecting pipe (33) extend to the inside of air inlet (32), the upper end of first aeration pipe (18) and second aeration pipe (20) all is provided with air cock (19).
6. The desulfurization and denitrification composite dedusting smoke filter device according to claim 1, which is characterized in that: the desulfurization catalyst (25) and the denitration catalyst (26) are fixed with the denitration and desulfurization tower (3) through clamping grooves.
7. The desulfurization and denitrification composite dedusting smoke filtering device according to claim 6, which is characterized in that: desulfurization catalyst (25) all are provided with division board (27) with the upper and lower side of denitration catalyst (26), the inside of division board (27) is provided with cavity (35), and cavity (35) are provided with two, a plurality of through-holes (36) have all been seted up to the upper and lower side of cavity (35) being the rectangle array, and through-hole (36) all are not in on the same vertical line.
8. The filtration method of the desulfurization and denitrification composite dedusting smoke filter device based on any one of claims 1 to 7 is characterized in that: the method comprises the following steps:
firstly, flue gas to be treated enters an absorbent injection box (1) through a smoke inlet pipe (5), a power supply of an air compressor (29) and a high-voltage electrostatic corona charging area (31) is started, the air compressor (29) transmits high-voltage gas to an injection device (7) positioned in the absorbent injection box (1) through a gas transmission pipe (8), the absorbent is injected through an absorbent transmission pipe (9) and the injection device (7), then the absorbent flows through the high-voltage electrostatic corona charging area (31) at high speed, the absorbent is provided with electrostatic charges, the absorbent is repelled due to the same charges, the surface is fully exposed, and the reaction efficiency with the flue gas is accelerated;
accelerating to convey the preliminarily adsorbed smoke into a separating device (2) through a first connecting pipe (11), electrifying electrodes of an ionization plate (13) in the conveying process to enable tiny dust in the smoke to collide with positive and negative ions and electrons between the electrodes to form electric charge, throwing dust particles with density larger than that of the gas to the inner wall by centrifugal force generated in the rotating process of the smoke after the smoke enters the separating device (2), and then enabling the dust particles to enter a collecting hopper, separating most of large-particle dust in upward cyclone, and enabling the dust particles with the electrons and the ions to move towards an opposite electrode and gradually accumulate on a dust collecting plate (14) under the action of electric field force in the rotating process to complete impurity separation;
thirdly, the gas enters a first aeration pipe (18) under the pressurization of a pressurization pump (17), sulfur dioxide in the flue gas reacts with hydrogen in water to generate a thiosulfuric acid complex, the gas contacted with the citric acid solution rises subsequently, meanwhile, under the action of a first circulating pump (28), the citric acid solution in a solution tank (4) is conveyed to a liquid collecting disc (22), the gas is sprayed downwards again through an atomizing nozzle (23) to form secondary adhesion, then a second circulating pump (34) is started to convey a part of the gas entering a filter cavity (24) through an air inlet hole (32) to a second aeration pipe (20) through a third connecting pipe (33), and the process is repeated for reaction again;
fourthly, carrying out final reaction and filtration on harmful substances in the flue gas through a denitration catalyst (26) and a desulfurization catalyst (25);
and step five, discharging the filtered smoke through an exhaust pipe (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110162026.6A CN112933838A (en) | 2021-02-05 | 2021-02-05 | Desulfurization and denitrification composite dedusting flue gas filtering device and filtering method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110162026.6A CN112933838A (en) | 2021-02-05 | 2021-02-05 | Desulfurization and denitrification composite dedusting flue gas filtering device and filtering method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112933838A true CN112933838A (en) | 2021-06-11 |
Family
ID=76242638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110162026.6A Pending CN112933838A (en) | 2021-02-05 | 2021-02-05 | Desulfurization and denitrification composite dedusting flue gas filtering device and filtering method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112933838A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05285340A (en) * | 1992-04-14 | 1993-11-02 | Nippon Steel Corp | Method for simultaneously desulfurizing and denitrating exhaust gas |
| CN102728204A (en) * | 2012-07-20 | 2012-10-17 | 华东理工大学 | Absorption tower for treating NO and SO2 in waste gas simultaneously |
| CN104162486A (en) * | 2013-05-20 | 2014-11-26 | 上海三卿环保科技有限公司 | Method for synchronously removing sulfur dioxide and fine particles in smoke through electrical charge and mist spray |
| CN104801422A (en) * | 2015-04-14 | 2015-07-29 | 重庆大学 | Efficient dust removal system for coal-fired flue gas |
| CN205613239U (en) * | 2016-05-18 | 2016-10-05 | 李明 | Desulfurization and denitrification dust remover |
| CN106512687A (en) * | 2016-12-26 | 2017-03-22 | 北京神雾环境能源科技集团股份有限公司 | Powdered coal industrial boiler flue gas denitrifying system and denitrifying method |
| CN207464412U (en) * | 2017-11-21 | 2018-06-08 | 成都纵远机械设备有限公司 | A kind of gas protecting electric welding machine |
| CN209791234U (en) * | 2019-04-25 | 2019-12-17 | 滨州职业学院 | Environment-friendly absorption tower for chemical production |
| CN211216089U (en) * | 2019-11-25 | 2020-08-11 | 苏州六星环境工程有限公司 | Desulfurization and denitrification spray tower |
| CN212017320U (en) * | 2020-04-30 | 2020-11-27 | 河南越尔环保科技有限公司 | Circulating kiln tail gas processing apparatus |
-
2021
- 2021-02-05 CN CN202110162026.6A patent/CN112933838A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05285340A (en) * | 1992-04-14 | 1993-11-02 | Nippon Steel Corp | Method for simultaneously desulfurizing and denitrating exhaust gas |
| CN102728204A (en) * | 2012-07-20 | 2012-10-17 | 华东理工大学 | Absorption tower for treating NO and SO2 in waste gas simultaneously |
| CN104162486A (en) * | 2013-05-20 | 2014-11-26 | 上海三卿环保科技有限公司 | Method for synchronously removing sulfur dioxide and fine particles in smoke through electrical charge and mist spray |
| CN104801422A (en) * | 2015-04-14 | 2015-07-29 | 重庆大学 | Efficient dust removal system for coal-fired flue gas |
| CN205613239U (en) * | 2016-05-18 | 2016-10-05 | 李明 | Desulfurization and denitrification dust remover |
| CN106512687A (en) * | 2016-12-26 | 2017-03-22 | 北京神雾环境能源科技集团股份有限公司 | Powdered coal industrial boiler flue gas denitrifying system and denitrifying method |
| CN207464412U (en) * | 2017-11-21 | 2018-06-08 | 成都纵远机械设备有限公司 | A kind of gas protecting electric welding machine |
| CN209791234U (en) * | 2019-04-25 | 2019-12-17 | 滨州职业学院 | Environment-friendly absorption tower for chemical production |
| CN211216089U (en) * | 2019-11-25 | 2020-08-11 | 苏州六星环境工程有限公司 | Desulfurization and denitrification spray tower |
| CN212017320U (en) * | 2020-04-30 | 2020-11-27 | 河南越尔环保科技有限公司 | Circulating kiln tail gas processing apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105727669B (en) | Dedusting demister and its application process | |
| CN103801168B (en) | The collaborative multiple pollutant associating removing means of a kind of flue gas ash removal and method | |
| CN105854479B (en) | A kind of ammonia type flue gas desulfurizing apparatus and method for removing aerosol | |
| CN204911132U (en) | High -efficient dust collector of flue gas | |
| CN102145316A (en) | Synergistic spray charging and electrostatic dust collecting method and device | |
| CN105457425B (en) | The purifying treatment method and its system of the charged aerosol desulphurization denitration dedusting of electrostatic cyclonic separation | |
| CN105668832B (en) | A kind of desulfurization wastewater treatment system and method | |
| CN205145894U (en) | Industrial waste gas's SOx/NOx control dust removal integration purification treatment system | |
| CN104174279B (en) | A kind of bipolar corona discharge FGD dust collection method and equipment thereof | |
| CN107469580A (en) | A kind of wet flue gas desulfurizing and hydrargyrum-removing dust removal integrated plant and technique | |
| CN204911125U (en) | Clean system of electric water smoke of whirlwind formula lotus separation micronic dust air | |
| CN109603539A (en) | A kind of industrial smoke high temperature desulfurizing denitration dust removal system and its processing method | |
| CN204637947U (en) | A kind of boiler flue gas purification treating apparatus | |
| CN206823495U (en) | A kind of system of pulsed plasma desulphurization denitration | |
| CN1382529A (en) | Self-drying corona discharge process and equipment for cleaning fume | |
| CN210278551U (en) | Hg and SO3Bag type dust collector with synergistic removal | |
| CN105080271A (en) | Cyclone charged water mist air purifying dedusting method and system thereof | |
| CN111434372B (en) | Method and device for treating flue gas generated by roasting of prebaked anode | |
| CN112933838A (en) | Desulfurization and denitrification composite dedusting flue gas filtering device and filtering method thereof | |
| CN1559651A (en) | Exbaust gas purification method and device by pulse corona dicharging method | |
| CN107020005A (en) | A kind of minimum discharge system for desulfuration and denitration | |
| CN203139851U (en) | Desulfurization and denitrification device of coal-fired power generation boiler | |
| CN212548813U (en) | Flue gas purification ultralow emission treatment system | |
| CN107952296A (en) | A kind of agglomerates of sintered pellets flue gas multiple pollutant cooperated purification system based on bag-type dusting | |
| CN208959619U (en) | A kind of carbon anode roasting flue gas purification device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210611 |
|
| RJ01 | Rejection of invention patent application after publication |