CN117815856A - Desulfurization and denitrification filter and application method thereof - Google Patents
Desulfurization and denitrification filter and application method thereof Download PDFInfo
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- CN117815856A CN117815856A CN202410018102.XA CN202410018102A CN117815856A CN 117815856 A CN117815856 A CN 117815856A CN 202410018102 A CN202410018102 A CN 202410018102A CN 117815856 A CN117815856 A CN 117815856A
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- layer
- desulfurization
- denitration
- flue gas
- reaction
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 135
- 230000023556 desulfurization Effects 0.000 title claims abstract description 135
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims abstract description 182
- 239000007788 liquid Substances 0.000 claims abstract description 59
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 39
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 39
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 21
- 239000002002 slurry Substances 0.000 claims abstract description 21
- 239000002699 waste material Substances 0.000 claims abstract description 19
- 238000002360 preparation method Methods 0.000 claims abstract description 16
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 131
- 239000003546 flue gas Substances 0.000 claims description 131
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 36
- 229910052717 sulfur Inorganic materials 0.000 claims description 36
- 239000011593 sulfur Substances 0.000 claims description 36
- 238000004868 gas analysis Methods 0.000 claims description 27
- 239000000779 smoke Substances 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 239000003054 catalyst Substances 0.000 claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 14
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 12
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 5
- 238000004458 analytical method Methods 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000000875 corresponding effect Effects 0.000 description 27
- 239000003570 air Substances 0.000 description 15
- 239000000126 substance Substances 0.000 description 15
- 239000007789 gas Substances 0.000 description 12
- 230000009471 action Effects 0.000 description 8
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 8
- 150000002826 nitrites Chemical class 0.000 description 8
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 230000009467 reduction Effects 0.000 description 6
- 238000001914 filtration Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 230000003009 desulfurizing effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910052815 sulfur oxide Inorganic materials 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 2
- 150000004683 dihydrates Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001546 nitrifying effect Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
Classifications
-
- 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
- B01D53/30—Controlling by gas-analysis apparatus
-
- 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
- B01D53/26—Drying gases or vapours
- B01D53/266—Drying gases or vapours by filtration
-
- 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
-
- 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
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen 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
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- 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
-
- 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
- B01D53/90—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/402—Dinitrogen oxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/404—Nitrogen oxides other than dinitrogen oxide
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a desulfurization and denitrification filter and a use method thereof, and relates to the technical field of desulfurization and denitrification, and the desulfurization and denitrification filter comprises a box body, wherein a desulfurization layer and a denitrification layer are fixedly connected in the box body, the desulfurization layer is communicated with a denitrification layer pipeline, the input end of the desulfurization layer penetrates out of the left cavity wall of the box body, the output end of the denitrification layer penetrates out of the upper cavity wall of the box body, one side of the box body is provided with a waste liquid box, the waste liquid box pipeline is communicated with the desulfurization layer and the denitrification layer, one side of the box body far away from the waste liquid box is provided with a lime water slurry box and an ammonia water preparation device, one side of the outer wall of the box body is fixedly connected with a control box, the lime water slurry box pipeline is communicated with a liquid extracting pump, the liquid extracting pump is in signal connection with the control box, the output end of the liquid extracting pump is communicated with a liquid inlet pipe, and the output end of the liquid inlet pipe penetrates into the desulfurization layer and is fixedly communicated with a sprayer, and the desulfurization layer comprises a plurality of desulfurization reaction layers.
Description
Technical Field
The invention relates to the technical field of desulfurization and denitrification, in particular to a desulfurization and denitrification filtering device and a use method thereof.
Background
Flue gas desulfurization and denitrification are a boiler flue gas purification technology which is mainly applied to the chemical industry for generating nitrogen oxides and sulfur oxides. Nitrogen oxides, sulfur oxides are one of the major sources of air pollution. The application of this technique has considerable benefits for the purification of ambient air. The flue gas emission of steel, coking, sintering and coal power plant can form low temperature saturated gas fume, and thereby white smoke and cold air mix back temperature reduction condensate water droplet and form acid rain etc. to the surrounding environment causes the pollution, can also cause haze weather simultaneously, consequently need carry out SOx/NOx control dust removal to the flue gas and handle for the flue gas reaches national requirement emission standard.
The prior desulfurization and denitrification filtration equipment is used for directly desulfurizing and denitrifying the flue gas through a desulfurization and denitrification device when the flue gas is subjected to desulfurization and denitrification filtration, and does not rapidly filter the flue gas desulfurization and denitrification process, so that the flue gas desulfurization and denitrification efficiency is low.
Therefore, it is necessary to design a desulfurization and denitrification filter with high filtration efficiency and a use method thereof.
Disclosure of Invention
The invention aims to provide a desulfurization and denitrification filter and a use method thereof, which are used for solving the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a desulfurization denitration filter equipment, includes the box, fixedly connected with desulfurization layer and denitration layer in the box, desulfurization layer and denitration layer pipeline intercommunication, the left side chamber wall of box is worn out to desulfurization layer input, the upside chamber wall of box is worn out to the output of denitration layer, box one side is provided with the waste liquid case, waste liquid case pipeline intercommunication desulfurization layer and denitration layer, one side that the waste liquid case was kept away from to the box is provided with lime water slurry tank and aqueous ammonia preparation ware, box outer wall one side fixedly connected with control box.
According to the technical scheme, lime water slurry tank pipeline intercommunication has the drawing liquid pump, drawing liquid pump and control box signal connection, the output intercommunication of drawing liquid pump has the feed liquor pipe, the output of feed liquor pipe penetrates inside the desulfurization layer and fixed intercommunication has the shower, the desulfurization layer includes a plurality of desulfurization reaction layers.
According to the technical scheme, the output intercommunication of aqueous ammonia preparation ware has the inlet tube, aqueous ammonia preparation ware and control box signal connection, the output of inlet tube penetrates the denitration layer inside and fixedly communicates there is the aqueous ammonia nozzle, the denitration layer includes a plurality of denitration reaction layer, a plurality of fixedly connected with a plurality of groups of metal catalyst in the denitration reaction layer, the denitration layer is close to the position fixedly connected with defroster of output.
According to the technical scheme, be S type intercommunication between the desulfurization reaction layer and the denitration reaction layer, the junction of desulfurization reaction layer and denitration reaction layer all communicates in addition has the exhaust layer, the liquid storage groove has all been seted up to desulfurization reaction layer and denitration reaction layer inner wall downside, every layer desulfurization reaction layer and denitration reaction layer ' S liquid storage groove bottom all pipeline intercommunication waste liquid case, two the exhaust layer respectively with the desulfurization layer, denitration reaction layer ' S output intercommunication sets up, desulfurization reaction layer and denitration reaction layer and exhaust layer ' S junction all is provided with the interception piece, the middle part fixedly connected with first axis of interception piece, and first axis one end runs through desulfurization layer and denitration layer respectively to there is motor one through the coupling joint, first axis with desulfurization layer and denitration layer ' S junction all is established to the bearing connection, motor one outer wall is fixed connection respectively on desulfurization layer and denitration layer ' S outer wall, motor one and control box signal connection, the output of reaction layer and denitration reaction layer just is close to one side of interception piece detector, the axis is connected with two through the second axis detector, the second axis is connected with the exhaust fan, the exhaust fan is connected with two, the exhaust fan is connected with the exhaust fan is fixed with the exhaust layer respectively.
According to the technical scheme, the denitration layer is also internally provided with an exhaust layer, a liquid storage tank, a plurality of exhaust fans, a plurality of interception blocks and a smoke analysis detector, the setting positions are consistent with the positions of the inside of the desulfurization layer, and the corresponding desulfurization reaction layer is a denitration reaction layer in the denitration layer.
According to the technical scheme, the liquid inlet pipe is provided with a plurality of first output pipes which are respectively communicated with each layer of the desulfurization reaction layer, the first output pipes are respectively provided with a first electric control valve, and the first electric control valves are in signal connection with the control box.
According to the technical scheme, the water inlet pipe is provided with a plurality of second output pipes which are respectively and correspondingly communicated with each layer of denitration reaction layer, second electric control valves are arranged on the second output pipes, and the second electric control valves are in signal connection with the control box.
According to the technical scheme, the metal catalyst in the denitration layer is fixedly connected to the bottom side of the inner wall of the denitration reaction layer, and the initial directions of all the interception blocks are all for blocking the channels leading to the exhaust layer.
Compared with the prior art, the invention has the following beneficial effects:
the flue gas analysis detector, the interception block and the multiple reaction layers are arranged, the content of sulfides and nitrifiers in the flue gas is detected through the flue gas analysis detector, and the flue gas is subjected to desulfurization and denitrification treatment by using the corresponding different numbers of reaction layers, so that the effect of accurately desulfurizing and denitrifying the flue gas with different sulfur and nitrate contents is realized;
through setting up the air discharge fan, through the rotation of air discharge fan to the flue gas, the effort of stirring turns over, makes the flue gas flow fast in the passageway, and the effect to desulfurization denitration in-process, acceleration flow, abundant reaction has been realized.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of the overall orthogonal structure of the present invention;
FIG. 2 is an overall orthogonal cross-sectional schematic of the present invention;
FIG. 3 is a schematic side cross-sectional view of a desulfurization layer of the present invention;
FIG. 4 is an enlarged schematic view of a side cross-sectional portion of a desulfurization layer of the present invention;
FIG. 5 is a schematic side cross-sectional view of a denitration layer of the present invention;
FIG. 6 is an enlarged schematic view of a partial cross-sectional side view of a denitration layer of the present invention;
in the figure: 1. a case; 2. a desulfurization layer; 3. a denitration layer; 4. a waste liquid tank; 5. lime water slurry tank; 6. an ammonia water preparation device; 7. a liquid pump; 8. a liquid inlet pipe; 9. a water inlet pipe; 10. a sprayer; 11. an ammonia water nozzle; 12. a metal catalyst; 13. a desulfurization reaction layer; 14. an exhaust layer; 15. a liquid storage tank; 16. intercepting the block; 17. a smoke analysis detector; 18. an exhaust fan; 19. a first motor; 20. a second motor; 21. a control box; 22. a denitration reaction layer; 23. a first electrically controlled valve; 24. a demister; 25. and a second electrically controlled valve.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-5, the present invention provides the following technical solutions: the desulfurization and denitrification filter comprises a box body 1, wherein a desulfurization layer 2 and a denitrification layer 3 are fixedly connected in the box body 1, the desulfurization layer 2 is communicated with the denitrification layer 3 through a pipeline, the input end of the desulfurization layer 2 penetrates out of the left cavity wall of the box body 1, the output end of the denitrification layer 3 penetrates out of the upper cavity wall of the box body 1, a waste liquid box 4 is arranged on one side of the box body 1, the waste liquid box 4 is communicated with the desulfurization layer 2 and the denitrification layer 3 through a pipeline, a lime water slurry box 5 and an ammonia water preparation device 6 are arranged on one side, far away from the waste liquid box 4, of the box body 1, the lime water slurry box 5 is used for storing lime slurry for desulfurizing flue gas, the ammonia water preparation device 6 is used for preparing ammonia water for denitrifying the flue gas, a control box 21 is fixedly connected on one side of the outer wall of the box body 1, the lime water slurry box 5 is communicated with a liquid pump 7 through a pipeline, the liquid pump 7 is in signal connection with the control box 21, the output end of the liquid pump 7 is communicated with a liquid inlet pipe 8, the output end of the liquid inlet pipe 8 penetrates into the desulfurization layer 2 and is fixedly communicated with a sprayer 10, the output end of the ammonia water preparation device 6 is communicated with a water inlet pipe 9, the ammonia water preparation device 6 is in signal connection with the control box 21, the output end of the water inlet pipe 9 penetrates into the denitration layer 3 and is fixedly communicated with an ammonia water nozzle 11, a plurality of groups of metal catalysts 12 are fixedly connected in the denitration layer 3, wherein the metal catalysts 12 comprise, but are not limited to palladium, copper and silver and are used for assisting the reaction of ammonia water and nitrites in flue gas, and a demister 24 is fixedly connected to the position, close to the output end, of the denitration layer 3 and is used for removing residual water vapor in flue gas;
in the embodiment, the flue gas is discharged into the box body 1 through the air pump after being discharged through the smoke discharging system of the boiler, the flue gas enters the desulfurization layer 2 through the input end of the desulfurization layer 2, at the moment, the liquid pump 7 is started, the lime water slurry is pumped to the sprayer 10 by the liquid pump 7 for spraying, sulfur dioxide in the flue gas and calcium carbonate in the lime water slurry are subjected to oxidation reaction to generate calcium sulfate, then the calcium sulfate and the redundant lime water slurry flow into the waste liquid box 4 from the pipeline, and after the calcium sulfate reaches a certain saturation degree in the waste liquid box 4, the calcium sulfate is crystallized to form dihydrate gypsum, and the dihydrate gypsum is manually dehydrated;
the flue gas after desulfurization enters the denitration layer 3 along the pipeline, at the moment, an ammonia water preparation device 6 is started, ammonia water is sprayed out of an ammonia water nozzle 11 along a water inlet pipe 9, the flue gas reacts with sprayed ammonia water and a metal catalyst 12 in the denitration layer 3 to generate nitrogen and water, the water flows into a waste liquid tank 4 along the pipeline, the nitrogen flows out along the pipeline along with the flue gas after the reaction, and the water vapor is filtered by a demister 24 and then is discharged from the output end of the denitration layer 3;
in the second embodiment, the following structure is added on the basis of the first embodiment:
referring to fig. 3, the desulfurization layer 2 comprises a plurality of desulfurization reaction layers 13, wherein the desulfurization reaction layers 13 are communicated in an S-type manner, an exhaust layer 14 is further communicated at the joint of the desulfurization reaction layers 13, a liquid storage tank 15 is formed at the bottom side of the inner wall of the desulfurization reaction layers 13 and is used for storing excessive sprayed lime water slurry and reactants, the bottom of the liquid storage tank 15 of each desulfurization reaction layer 13 is communicated with a waste liquid tank 4 through pipelines, the exhaust layer 14 is communicated with the output end of the desulfurization layer 2, an interception block 16 is arranged at the joint of the desulfurization reaction layers 13 and the exhaust layer 14 in the desulfurization layer 2, a first center shaft is fixedly connected with the middle part of the interception block 16, one end of the first center shaft penetrates through the desulfurization layer 2 and is connected with a first motor 19 through a shaft coupling, the first center shaft 19 is driven to rotate by the motor 19, the joint of the first center shaft and the desulfurization layer 2 is in bearing connection, the outer wall of the first motor 19 is fixedly arranged on the outer wall of the desulfurization layer 2, the first motor 19 is in signal connection with a control box 21, the interception block 16 is used for sealing a channel in the desulfurization layer 2, one side of the desulfurization reaction layer 13 is fixedly connected with the output end of the desulfurization reaction layer 16 and is fixedly connected with an interception block 16, a flue gas analyzer 17 is fixedly connected with one side of the output end of the flue gas analyzer, the second center shaft is fixedly connected with the second center shaft 20 through the second center shaft, the second center shaft is fixedly connected with the second center shaft 20, and is fixedly connected with the second center shaft 20 through a second center shaft 20, and is fixedly connected with the second center shaft 20, and is connected with the second center shaft 20;
referring to fig. 5, the inside of the denitration layer 3 is also provided with an exhaust layer 14, a liquid storage tank 15, a plurality of exhaust fans 18, a plurality of interception blocks 16 and a flue gas analysis detector 17, and the setting positions are consistent with the positions set inside the desulfurization layer 2, and the corresponding desulfurization reaction layer 13 is a denitration reaction layer 22 in the denitration layer 3.
The liquid inlet pipe 8 is provided with a plurality of first output pipes which are respectively communicated with each layer of the sulfur removal reaction layer 13 correspondingly, and the first output pipes are provided with first electric control valves 23, and the first electric control valves 23 are in signal connection with the control box 21;
similarly, the water inlet pipe 9 is provided with a plurality of second output pipes which are respectively and correspondingly communicated with each denitration reaction layer 22, and the second output pipes are respectively provided with a second electric control valve 25, and the second electric control valves 25 are in signal connection with the control box 21;
the metal catalyst 12 in the denitration layer 3 is fixedly connected to the bottom side of the inner wall of the denitration reaction layer 22;
all the interception blocks 16 are initially oriented to block the passage to the air exhaust layer 14;
in this embodiment, the flue gas flows through one layer of the sulfur removal reaction layer 13, the first electric control valve 23 on the liquid inlet pipe 8 corresponding to one layer of the sulfur removal reaction layer 13 is opened under the control of the control box 21, lime water slurry can be sprayed out by the sprayer 10 with only one layer of the sulfur removal reaction layer 13 to react with the flue gas, after the reaction is finished, the flue gas analysis detector 17 at one layer end detects that no sulfide exists in the flue gas, which indicates that the content of sulfide in the flue gas is low, the sulfur removal reaction treatment is finished, and then the denitration reaction on the nitrified substances is directly carried out, so that the interception block 16 at the end of the corresponding layer of the sulfur removal reaction layer 13 is controlled to rotate and block the channel leading to the two layers of the sulfur removal reaction layer 13, thereby opening the channel leading to the exhaust layer 14, starting the exhaust fan 18 in the associated exhaust layer 14, and accelerating the flue gas flowing into the denitration layer 3 along the exhaust layer 14, and the flue gas entering one layer of the denitration reaction layer 22;
when the flue gas is detected to still contain sulfide by the flue gas analysis detector 17 at the tail end of the first layer of the sulfur removal reaction layer 13 after the flue gas reacts with lime water slurry, the content of sulfur substances in the flue gas is high, which indicates that the flue gas is not completely desulfurized after passing through the first layer of the sulfur removal reaction layer 13, so that the flue gas needs to flow into the second layer of the sulfur removal reaction layer 13 to continuously carry out sulfur removal treatment, so that the interception block 16 at the tail end of the first layer of the sulfur removal reaction layer 13 needs to be controlled to be kept still, the passage of the first layer of the sulfur removal reaction layer 13 to the exhaust layer 14 is continuously blocked, the exhaust fan 18 corresponding to the second layer of the sulfur removal reaction layer 13 is opened, the flue gas is enabled to flow into the second layer of the sulfur removal reaction layer 13 quickly, the flue gas is controlled by the control box 21, opening a first electric control valve 23 on a liquid inlet pipe 8 corresponding to the two-layer sulfur removal reaction layer 13, enabling a sprayer 10 of the two-layer sulfur removal reaction layer 13 to spray lime water slurry to react with flue gas, after the completion of the reaction, detecting that no sulfide exists in the flue gas by a flue gas analysis detector 17 at the tail end of the two-layer sulfur removal reaction layer 13, indicating that the sulfide in the flue gas has completed sulfur removal reaction treatment, and then directly carrying out denitration reaction on the nitrified substances, thereby controlling an interception block 16 at the tail end of the corresponding two-layer sulfur removal reaction layer 13 to rotate and block a channel leading to the three-layer sulfur removal reaction layer 13, opening a channel leading to the air exhaust layer 14, starting an air exhaust fan 18 in the associated air exhaust layer 14, enabling the flue gas to flow into the denitration layer 3 along the air exhaust layer 14 in an accelerating way, and enabling the flue gas to enter the one-layer of the denitration reaction layer 22;
when the flue gas is detected to still contain sulfide by the flue gas analysis detector 17 at the tail end of the two-layer desulfurization reaction layer 13 after the flue gas reacts with lime water slurry, the content of sulfur substances in the flue gas is high, which indicates that the flue gas is not completely desulfurized after passing through the two-layer desulfurization reaction layer 13, so that the flue gas needs to flow into the three-layer desulfurization reaction layer 13 to continuously carry out desulfurization treatment, the interception block 16 at the tail end of the two-layer desulfurization reaction layer 13 needs to be controlled to keep still, so that the channel of the two-layer desulfurization reaction layer 13 to the exhaust layer 14 is continuously blocked, the exhaust fan 18 corresponding to the three-layer desulfurization reaction layer 13 is opened, the flue gas is enabled to flow into the three-layer desulfurization reaction layer 13 rapidly, the first electric control valve 23 on the feed pipe 8 corresponding to the three-layer desulfurization reaction layer 13 is opened under the control of the control box 21, the sprayer 10 of the three-layer desulfurization reaction layer 13 can spray lime water slurry to react with the flue gas, after the reaction is finished, when the flue gas analysis detector 17 at the tail end of the three-layer desulfurization reaction layer 13 detects that sulfide is still contained in the flue gas, the flue gas is continuously controlled by the control box 21 to flow into the next-layer desulfurization reaction layer 13 to continuously carry out desulfurization reaction, after the flue gas is subjected to desulfurization treatment by the N-layer desulfurization reaction layer 13, the N layers represent the number of layers of the desulfurization reaction layer 13 which need to participate in the flue gas desulfurization reaction, the content of sulfur substances in the desulfurization reaction layer 13 and the corresponding flue gas which need to be desulfurized is positively correlated, the higher the content of sulfide in the flue gas is, the more the number of layers of the desulfurization reaction layer 13 which need to carry out desulfurization on the flue gas is, until the flue gas analysis detector 17 at the tail end of the N-layer desulfurization reaction layer 13 detects that no sulfide is in the flue gas, the desulfurization reaction treatment is finished on the sulfide in the flue gas, and then the denitration reaction on the nitrites is directly carried out, the interception blocks 16 at the tail end of the corresponding N-layer sulfur removal reaction layer 13 are controlled to rotate and block the channel leading to the next layer of sulfur removal reaction layer 13, so that the channel leading to the exhaust layer 14 is opened, an exhaust fan 18 in the associated exhaust layer 14 is started, the flue gas flows into the denitration layer 3 along the exhaust layer 14 in an accelerating way, and the flue gas enters a layer of denitration reaction layer 22;
the flue gas flows through a layer of denitration reaction layer 22, a second electric control valve 25 on a water inlet pipe 9 corresponding to the layer of denitration reaction layer 22 is opened under the control of a control box 21, ammonia water can be sprayed out from an ammonia water nozzle 11 of only one layer of denitration reaction layer 22, the ammonia water reacts with nitrified substances in the flue gas under the reduction action of a metal catalyst 12, after the completion of the reaction, the flue gas analysis detector 17 at the tail end of the layer of denitration reaction layer 22 detects that the nitrified substances in the flue gas are not contained in the flue gas, the content of the nitrified substances in the flue gas is low, the denitration reaction treatment is finished, and the flue gas is directly discharged, so that an interception block 16 at the tail end of the corresponding layer of denitration reaction layer 22 is controlled to rotate and block a channel leading to the two layers of denitration reaction layer 22, the channel leading to the exhaust layer 14 is opened, an exhaust fan 18 in the associated exhaust layer 14 is started, and the flue gas flows to the output end of the denitration layer 3 along the exhaust layer 14 in an accelerating way, and is discharged into the air after the dehumidification and filtration of a demister 24;
when the smoke gas in one layer of denitration reaction layer 22 is subjected to denitration reaction with ammonia water under the reduction action of the metal catalyst 12 and is detected by the smoke gas analysis detector 17 at the tail end of the one layer of denitration reaction layer 22 to still contain nitrified substances, the content of the nitrified substances in the smoke gas is high, and after the smoke gas passes through the one layer of denitration reaction layer 22 and is not completely denitrated, the smoke gas needs to flow into the next layer of denitration reaction layer 22, and the denitration treatment is continuously carried out on the smoke gas, so that the interception block 16 at the tail end of the one layer of denitration reaction layer 22 needs to be controlled to remain static, the channel of the one layer of denitration reaction layer 22 to the exhaust layer 14 is continuously blocked, the exhaust fan 18 corresponding to the two layers of denitration reaction layer 22 is opened, the smoke gas rapidly flows into the two layers of denitration reaction layer 22, the second electric control valve 25 on the water inlet pipe 9 corresponding to the two layers of denitration reaction layer 22 is opened through the control box 21 control, the ammonia water nozzle 11 of the two-layer denitration reaction layer 22 can spray ammonia water, the ammonia water reacts with nitrifying substances in the flue gas under the reduction action of the metal catalyst 12, after the completion of the reaction, the flue gas analysis detector 17 at the tail end of the two-layer denitration reaction layer 22 detects that no nitrifying substances in the flue gas are in the flue gas, the denitration reaction treatment is finished, and the flue gas is directly discharged, so that the interception block 16 at the tail end of the corresponding two-layer denitration reaction layer 22 is controlled to rotate and block the channel leading to the three-layer denitration reaction layer 22, the channel leading to the air exhaust layer 14 is opened, the exhaust fan 18 in the associated air exhaust layer 14 is started, and the flue gas is accelerated to flow to the output end of the denitration layer 3 along the air exhaust layer 14, is dehumidified and filtered by the demister 24 and then discharged into the air;
when the smoke gas in the two-layer denitration reaction layer 22 is subjected to denitration reaction with ammonia water under the reduction action of the metal catalyst 12 and is detected by the smoke gas analysis detector 17 at the tail end of the two-layer denitration reaction layer 22 to still contain nitrified substances, the content of the nitrified substances in the smoke gas is high, and the smoke gas is not completely denitrated after passing through the two-layer denitration reaction layer 22, so that the smoke gas needs to flow into the three-layer denitration reaction layer 22 and is continuously subjected to denitration treatment, the interception block 16 at the tail end of the two-layer denitration reaction layer 22 needs to be controlled to remain stationary, so that the channel of the two-layer denitration reaction layer 22 to the exhaust layer 14 is continuously blocked, the exhaust fan 18 corresponding to the three-layer denitration reaction layer 22 is opened, the smoke gas is enabled to flow into the three-layer denitration reaction layer 22 rapidly, the control box 21 is used for controlling to open the second electric control valve 25 on the water inlet pipe 9 corresponding to the three-layer denitration reaction layer 22, the ammonia water nozzle 11 of the three-layer denitration reaction layer 22 can spray ammonia water to react with the nitrites in the flue gas under the reduction action of the metal catalyst 12, after the reaction is finished, when the flue gas analysis detector 17 at the tail end of the three layers detects that the flue gas still contains nitrites, the flue gas continuously flows into the next layer denitration reaction layer 22 to carry out denitration reaction under the control of the control box 21, after the flue gas is subjected to denitration treatment by the M layer denitration reaction layer 22, the M layer represents the number of layers of the denitration reaction layer 22 which needs to participate in the flue gas denitration reaction, the denitration reaction layer 22 is positively correlated with the corresponding nitrites in the flue gas which needs to be subjected to denitration, the higher the nitrites in the flue gas is, the more the number of layers of the denitration reaction layer 22 which needs to carry out denitration on the flue gas is required until the flue gas analysis detector 17 at the tail end of the M layer denitration reaction layer 22 detects that the flue gas does not contain nitrites, indicating that the nitrifier in the flue gas has completed the denitration reaction treatment, and then directly exhausting the flue gas, thereby controlling the interception block 16 at the tail end of the corresponding M layer denitration reaction layer 22 to rotate and block the channel leading to the next layer denitration reaction layer 22 of the M layer, thereby opening the channel leading to the exhaust layer 14, starting the exhaust fan 18 in the associated exhaust layer 14, so that the flue gas flows to the output end of the denitration layer 3 along the exhaust layer 14 in an accelerating way, and is discharged into the air after being dehumidified and filtered by the demister 24;
the application method of the desulfurization and denitrification filter comprises the following steps:
s1: the flue gas enters the input end of the desulfurization layer 2;
s2: flue gas enters the desulfurization reaction layer 13 from the input end of the desulfurization layer 2;
s3: starting a liquid pump 7, opening a first electric control valve 23 on a liquid inlet pipe 8 of a corresponding desulfurization reaction layer 13, and spraying lime water slurry from a sprayer 10 to react with flue gas;
s4: the reacted flue gas passes through a flue gas analysis detector 17 at the tail end of the N-layer sulfur removal reaction layer 13, and is inspected by the flue gas analysis detector 17;
s5: the flue gas analysis detector 17 detects that sulfide is not contained in the flue gas;
s6: the control box 21 controls the corresponding interception blocks 16 of the N-layer sulfur removal reaction layer 13 to rotate, so as to block the channel leading to the next layer sulfur removal reaction layer 13;
s7: the flue gas flows out from the channels of the exhaust layer 14 corresponding to the N-layer sulfur removal reaction layer 13 to the input end of the denitration layer 3;
s8: the flue gas enters the denitration reaction layer 22 from the input end of the denitration layer 3;
s9: starting an ammonia water preparation device 6, opening a second electric control valve 25 on a water inlet pipe 9 of a corresponding denitration reaction layer 22, and spraying ammonia water from an ammonia water nozzle 11 to react with flue gas;
s10: the reacted flue gas passes through a flue gas analysis detector 17 at the tail end of the M-layer denitration reaction layer 22, and is inspected by the flue gas analysis detector 17;
s11: the smoke analysis detector 17 detects that no nitrites exist in the smoke;
s12: the control box 21 controls the interception blocks 16 corresponding to the M-layer denitration reaction layers 22 to rotate, and blocks the channels leading to the next-layer denitration reaction layer 22;
s13: the flue gas flows out of the output end of the denitration layer 3 after being filtered by the demister 24 from the channel of the exhaust layer 14 corresponding to the M-layer denitration reaction layer 22.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a SOx/NOx control filter equipment, includes box (1), its characterized in that: the utility model discloses a desulfurization layer, denitration layer, box (1) internal fixation, desulfurization layer (2) and denitration layer (3) pipeline intercommunication, left side cavity wall of box (1) is worn out to desulfurization layer (2) input, the upside cavity wall of box (1) is worn out to the output of denitration layer (3), box (1) one side is provided with waste liquid case (4), waste liquid case (4) pipeline intercommunication desulfurization layer (2) and denitration layer (3), one side that waste liquid case (4) was kept away from to box (1) is provided with lime water thick liquid case (5) and aqueous ammonia preparation ware (6), box (1) outer wall one side fixedly connected with control box (21).
2. The desulfurization and denitrification filter according to claim 1, wherein: lime water slurry tank (5) pipeline intercommunication has drawing liquid pump (7), drawing liquid pump (7) and control box (21) signal connection, the output intercommunication of drawing liquid pump (7) has feed liquor pipe (8), the output of feed liquor pipe (8) penetrates inside desulfurization layer (2) and fixed intercommunication has spray thrower (10), desulfurization layer (2) include a plurality of desulfurization reaction layers (13).
3. The desulfurization and denitrification filter according to claim 2, wherein: the utility model discloses a denitration device, including denitration layer (3), ammonia water preparation ware (6), control box (21), ammonia water preparation ware (6) output intercommunication has inlet tube (9), ammonia water preparation ware (6) and control box (21) signal connection, the output of inlet tube (9) penetrates inside denitration layer (3) and fixedly connected with ammonia water nozzle (11), denitration layer (3) include a plurality of denitration reaction layer (22), a plurality of fixedly connected with a plurality of groups of metal catalyst (12) in denitration reaction layer (22), denitration layer (3) are close to position fixedly connected with defroster (24) of output.
4. A desulfurization and denitrification filter according to claim 3, wherein: the desulfurization reaction layer (13) and the denitration reaction layer (22) are communicated in an S-shaped manner, the joint of the desulfurization reaction layer (13) and the denitration reaction layer (22) is additionally communicated with an exhaust layer (14), liquid storage tanks (15) are respectively arranged at the bottom sides of the inner walls of the desulfurization reaction layer (13) and the denitration reaction layer (22), each layer of desulfurization reaction layer (13) and the denitration reaction layer (22) are communicated with a waste liquid tank (4) through pipelines at the bottoms of the liquid storage tanks (15), the two exhaust layers (14) are respectively communicated with the output ends of the desulfurization layer (2) and the denitration layer (3), interception blocks (16) are respectively arranged at the joint of the desulfurization reaction layer (13) and the denitration reaction layer (22) and the exhaust layer (22), a first center shaft is fixedly connected to the middle part of each interception block (16), one end of the first center shaft respectively penetrates through the desulfurization layer (2) and the denitration layer (3) and is connected with a motor one (19) through a coupling, the first center shaft is respectively connected with the motor (2) and the denitration layer (3) through the motor (19) at the joint of the motor (2) and the denitration layer (3) and the motor (3) is fixedly connected with the outer wall (19) through the motor (3), the desulfurization reaction layer (13) and denitration reaction layer (22) output and be close to one side of interception piece (16) and all fixedly connected with flue gas analysis detector (17), flue gas analysis detector (17) and control box (21) line connection, the inside of desulfurization layer (2) and denitration layer (3) all is provided with a plurality of air discharge fans (18), the middle part fixedly connected with second axis of air discharge fans (18), and second axis one end runs through desulfurization layer (2) and denitration layer (3) respectively to through the coupling joint by motor two (20), the second axis with the junction of desulfurization layer (2) and denitration layer (3) all sets up to the bearing connection, motor two (20) outer wall is fixedly connected on the outer wall of desulfurization layer (2) and denitration layer (3) respectively, motor two (20) and control box (21) signal connection.
5. The desulfurization and denitrification filter according to claim 4, wherein: the denitration layer (3) is internally provided with an exhaust layer (14), a liquid storage tank (15), a plurality of exhaust fans (18), a plurality of interception blocks (16) and a smoke analysis detector (17), the setting position is consistent with the position of the inside setting of the desulfurization layer (2), and the corresponding desulfurization reaction layer (13) is a denitration reaction layer (22) in the denitration layer (3).
6. The desulfurization and denitrification filter according to claim 5, wherein: the liquid inlet pipe (8) is provided with a plurality of first output pipes which are respectively communicated with each layer of the sulfur removal reaction layer (13), the first output pipes are respectively provided with a first electric control valve (23), and the first electric control valves (23) are in signal connection with the control box (21).
7. The desulfurization and denitrification filter according to claim 6, wherein: the water inlet pipe (9) is provided with a plurality of second output pipes which are respectively and correspondingly communicated with each denitration reaction layer (22), second electric control valves (25) are arranged on the second output pipes, and the second electric control valves (25) are in signal connection with the control box (21).
8. The desulfurization and denitrification filter according to claim 7, wherein: the metal catalyst (12) in the denitration layer (3) is fixedly connected to the bottom side of the inner wall of the denitration reaction layer (22).
9. The desulfurization and denitrification filter according to claim 8, wherein: the initial direction of all the interception blocks (16) is to block the passage to the exhaust layer (14).
10. The method for using the desulfurization and denitrification filter as claimed in claim 9, wherein:
s1: the flue gas enters the input end of the desulfurization layer (2);
s2: flue gas enters the desulfurization reaction layer (13) from the input end of the desulfurization layer (2);
s3: starting a liquid pump (7), opening a first electric control valve (23) on a liquid inlet pipe (8) of a corresponding desulfurization reaction layer (13), spraying lime water slurry from a sprayer (10), and reacting with flue gas;
s4: the reacted flue gas passes through a flue gas analysis detector (17) at the tail end of the N-layer sulfur removal reaction layer (13), and is inspected by the flue gas analysis detector (17);
s5: the flue gas analysis detector (17) detects that sulfide is not contained in the flue gas;
s6: the control box (21) controls the interception blocks (16) corresponding to the N-layer sulfur removal reaction layers (13) to rotate so as to block the channel leading to the next layer of sulfur removal reaction layer (13);
s7: the flue gas flows out from the channels of the exhaust layers (14) corresponding to the N-layer sulfur removal reaction layers (13) to the input end of the denitration layer (3);
s8: flue gas enters the denitration reaction layer (22) from the input end of the denitration layer (3);
s9: starting an ammonia water preparation device (6), opening a second electric control valve (25) on a water inlet pipe (9) of a corresponding denitration reaction layer (22), and spraying ammonia water from an ammonia water nozzle (11) to react with flue gas;
s10: the reacted flue gas passes through a flue gas analysis detector (17) at the tail end of the M-layer denitration reaction layer (22), and is inspected by the flue gas analysis detector (17);
s11: the smoke analysis detector (17) detects that no nitrifier exists in the smoke;
s12: the control box (21) controls the interception blocks (16) corresponding to the M-layer denitration reaction layers (22) to rotate so as to block the channel leading to the next denitration reaction layer (22);
s13: the flue gas flows out of the output end of the denitration layer (3) after being filtered by a demister (24) from the channel of the exhaust layer (14) corresponding to the M-layer denitration reaction layer (22).
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