CN213995448U - Low-nitrogen denitration device based on SCR method - Google Patents
Low-nitrogen denitration device based on SCR method Download PDFInfo
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- CN213995448U CN213995448U CN202022590793.0U CN202022590793U CN213995448U CN 213995448 U CN213995448 U CN 213995448U CN 202022590793 U CN202022590793 U CN 202022590793U CN 213995448 U CN213995448 U CN 213995448U
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Abstract
The utility model belongs to the technical field of environment-friendly device and specifically relates to a low nitrogen denitrification facility based on SCR method is related to, it includes the SCR reactor body, the entry flue, infusion pipeline and export flue, the SCR reactor body is the cavity setting, first through-hole and second through-hole have been seted up to SCR reactor body both sides, the entry flue passes inside first through-hole stretches into the SCR reactor body, the infusion pipeline passes inside the second through-hole stretches into the SCR reactor body, infusion pipeline inner fixedly connected with atomizing spray gun, the box body has been placed to SCR reactor body top, inside the box body can be stretched into to the export flue, the inside active carbon of having placed of box body, the nitrogen gas that the SCR reactor body generated filters the nitrogen gas that contains impurity gas through active carbon. The application has the effect of containing the defect of nitrogenous waste gas in the nitrogen gas that SCR reactor body reaction produced.
Description
Technical Field
The application relates to the field of environment-friendly devices, in particular to a low-nitrogen denitration device based on an SCR method.
Background
Currently, the cement industry is N0XThe important industry for emission reduction, the clinker industry being part of the cement industry, N0XThe nitrogen oxides are main components of acid rain, and meanwhile, the nitrogen oxides have become main waste gas pollution sources, and cement factories are used as main components for generating the nitrogen oxides, the emission of the cement industry in China is generally about 800mg/Nm3, while the emission of the cement industry in foreign countries such as European Union is generally about 500mg/Nm3, so that the work of reducing the emission of the atmospheric pollutants such as denitration is important and is also urgent to be carried out in order to reduce the gap with developed countries.
The rotary kiln is a key technical device for firing dry cement materials, and is also N0XIs the main source of (1). A technology employing Selective Catalytic Reduction (SCR) denitration is mature commercial N0XThe control treatment technology and the SCR method mainly spray nitrogen-containing chemical agents into the lean-burn flue gas at 850-1050 ℃ to reduce N0 and generate nitrogen and water.
In view of the above-mentioned related art, the inventors considered that there was a defect that nitrogen gas generated by the reaction contained nitrogen-containing off-gas impurities.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defect that nitrogen generated by reaction contains nitrogen-containing exhaust gas impurities, the invention provides a low-nitrogen denitration device based on an SCR method.
The application provides a low nitrogen denitrification facility based on SCR method adopts following technical scheme:
including SCR reactor body, entry flue, export flue and infusion pipeline, SCR reactor body is inside to be the cavity setting, first through-hole and second through-hole have been seted up to SCR reactor both sides, the entry flue passes inside first through-hole stretches into SCR reactor body, the infusion pipeline passes inside the second through-hole stretches into SCR reactor body, the third through-hole has been seted up on SCR reactor body upper portion, SCR reactor body top fixedly connected with box body, inside the export flue passes the third through-hole and stretches into the box body, export the first filter screen of flue upper portion fixedly connected with, the inside active carbon of having placed of box body.
Through adopting above-mentioned technical scheme, nitrogenous waste gas is discharged into SCR reactor body through the entry flue inside, and inside the ammonia liquor passed through infusion pipeline entering SCR reactor body, the inside nitrogenous waste gas of doping of nitrogen gas that generates entered into the box body through the export flue inside, and the nitrogenous waste gas that the inside active carbon of box body can be doped absorbs, is the purer nitrogen gas in the emission air.
Preferably, the inside lower extreme of SCR reactor body is provided with catalytic assembly, and catalytic assembly contains link and the multilayer catalyst board of fixed connection on the link, and multilayer catalyst board inclines on the link and sets up, the link and the inside fixed connection of SCR reactor body.
By adopting the technical scheme, the reaction speed of the nitrogen-containing waste gas and the ammonia liquid can be accelerated by the multiple layers of catalyst plates, so that the efficiency of treating the waste gas in a factory is higher.
Preferably, the inner wall of the SCR reactor body is provided with an interlayer, a heating component is arranged in an inner cavity of the interlayer, the heating component comprises a liquid storage pipe which is spirally sleeved outside the SCR reactor body and a protective pipe which is sleeved outside the liquid storage pipe, and the protective pipe is fixedly connected to the SCR reactor body.
Through adopting above-mentioned technical scheme, the outside kerosene that will reach the boiling point sends into the transfer line, and the guard tube can play the effect of protection to the transfer line, can play the effect of accelerating to the internal reaction of SCR reactor body owing to there is the transfer line.
Preferably, all around fixedly connected with montant on using the export flue as center SCR reactor body lateral wall, montant top fixedly connected with cover the body, the cover body is located the box body top, leaves the space between the cover body and the box body.
Through adopting above-mentioned technical scheme, when the existence of rainy day, because the cover body is located the box body top, the guard action that the cover body can play the box body, the space that leaves between the cover body and the box body also can make nitrogen gas discharge in the air.
Preferably, the inside pump body that is provided with in SCR reactor body lower part, the pump body fixed connection is on the inside wall of SCR reactor body lower part, and the end of intaking of the pump body has set firmly the pipe that absorbs water, and the play water end of the pump body has set firmly first outlet pipe, and the outer end of first outlet pipe has set firmly the second outlet pipe, and the second outlet pipe opening is up.
Through adopting above-mentioned technical scheme, the pipe that absorbs water of the pump body inhales the inside water that generates of SCR reactor body inside the pump body, and the second outlet pipe of play water subassembly can realize abluent effect with water injection on catalytic module's the catalyst board.
Preferably, the lower part of the second water outlet pipe is provided with an opening, the opening at the lower part of the second water outlet pipe is fixedly connected with a third water outlet pipe, and the opening of the third water outlet pipe faces downwards.
By adopting the technical scheme, the third water outlet pipe discharges water of the pump body to clean the lower part of the SCR reactor body.
Preferably, the inner end of the inlet flue is provided with a first valve.
Through adopting above-mentioned technical scheme, whether the steerable nitrogenous waste gas of first valve can get into SCR reactor body through the entry flue inside to whether take place the reaction when control SCR reactor body is inside.
Preferably, the inner end of the liquid conveying pipeline is provided with an atomizing spray gun, and the outer end of the liquid conveying pipeline is provided with a second valve.
By adopting the technical scheme, the ammonia liquid in the liquid conveying pipeline is changed into a fog shape through the atomizing spray gun, the ammonia liquid can fully react with the nitrogen-containing waste gas, and the reaction effect is better; the second valve arranged on the liquid conveying pipeline controls whether ammonia liquid can enter the SCR reactor body through the liquid conveying pipeline or not, so that whether reaction occurs or not when the SCR reactor body is inside is controlled.
In summary, the present application includes at least one of the following beneficial technical effects:
1. nitrogen-containing waste gas is discharged into the SCR reactor body through the inlet flue, ammonia liquid enters the SCR reactor body through the liquid conveying pipeline, the generated nitrogen-containing waste gas doped in the nitrogen enters the box body through the outlet flue, and the activated carbon in the box body can be absorbed by the doped nitrogen-containing waste gas and is relatively pure nitrogen discharged into the air;
2. the ammonia liquid in the liquid conveying pipeline is changed into a mist shape through the atomizing spray gun, the ammonia liquid can fully react with the nitrogen-containing waste gas, and the reaction effect is better; the second valve arranged on the liquid conveying pipeline controls the on-off of the ammonia liquid entering the liquid conveying pipeline.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a low-nitrogen denitration device in the embodiment of the present application;
FIG. 2 is a schematic view of the connection structure of the heating assembly and the SCR reactor body in the embodiment of the present application;
FIG. 3 is a schematic cross-sectional view of a low-nitrogen denitration apparatus according to an embodiment of the present application.
Description of reference numerals: 1. an SCR reactor body; 2. an inlet flue; 3. a fluid delivery conduit; 4. an outlet flue; 5. a first through hole; 6. a second through hole; 7. a first valve; 8. a second valve; 9. an atomizing spray gun; 10. a third through hole; 11. a box body; 12. a fourth via hole; 13. a first filter screen; 14. a second filter screen; 15. a vertical rod; 16. a cover body; 17. a catalytic component; 171. a connecting frame; 172. a catalyst plate; 18. a third valve; 19. a pump body; 20. a heating assembly; 201. a liquid storage tube; 202. a protective tube; 21. an interlayer; 23. a first water outlet pipe; 24. a second water outlet pipe; 25. a third water outlet pipe; 26. a suction pipe.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The embodiment of the application discloses low nitrogen denitrification facility based on SCR method. Referring to fig. 1 and 3, it includes SCR reactor body 1, entry flue 2, infusion pipeline 3 and export flue 4, SCR reactor body 1 is cavity setting, first through-hole 5 and second through-hole 6 have been seted up to SCR reactor body 1 both sides, entry flue 2 passes first through-hole 5 and stretches into inside SCR reactor body 1, 2 outer end fixedly connected with first valve 7 of entry flue, infusion pipeline 3 passes second through-hole 6 and stretches into inside SCR reactor body 1, 3 inner fixedly connected with spray gun 9 of infusion pipeline, fixedly connected with second valve 8 on the infusion pipeline 3 outer end.
A third through hole 10 is formed above the SCR reactor body 1, a first filter screen 13 is fixedly connected to the position of the third through hole 10, a box body 11 is fixedly connected to the upper side of the SCR reactor body 1, the box body 11 is of a cylindrical structure, an outlet flue 4 can penetrate through the third through hole 10 and extend into the box body 11, activated carbon is placed in the box body 11, the size of an opening of the first filter screen 13 is smaller than that of the activated carbon, and a second filter screen 14 is fixedly connected to the top of the box body 11; use export flue 4 as fixedly connected with montant 15 all around on the 1 lateral wall of central SCR reactor body, montant 15 top fixedly connected with cover 16, cover 16 is located box body 11 top, leaves the space between cover 16 and the box body 11, and in the nitrogen gas that 1 internal reaction of SCR reactor body generated passed through export flue 4 and got into box body 11, the nitrogen-containing waste gas of doping in the 11 inside active carbon adsorbable nitrogen gas of box body.
The inside catalytic assembly 17 that is provided with of SCR reactor body 1, catalytic assembly 17 contain link 171 and the multilayer catalyst board 172 of fixed connection on link 171, and link 171 links to each other with SCR reactor body 1 inside wall, and multilayer catalyst board 172 is the slope setting on link 171.
The lower part of the SCR reactor body 1 is in a cone shape, the cone top of the cone is provided with a third valve 18, a pump body 19 is arranged inside the lower part of the SCR reactor body 1, the pump body 19 is fixedly connected to the inner side wall of the lower part of the SCR reactor body 1, a water suction pipe 26 is fixedly arranged at the water inlet end of the pump body 19, the water suction pipe 26 of the pump body 19 can suck water generated inside the SCR reactor body 1 into the pump body 19, the outer end of the first water outlet pipe 23 is fixedly provided with a second water outlet pipe 24, the opening of the second water outlet pipe 24 faces upwards, the lower part of the second water outlet pipe 24 is provided with an opening, a third water outlet pipe 25 is fixedly connected to the opening of the lower part of the second water outlet pipe 24, and the opening of the third water outlet pipe 25 faces downwards.
There is no obstacle between the catalytic component 17 and the second water outlet pipe 232 and the catalytic component 17, the lower part of the second water outlet pipe 232 is provided with an opening, the third water outlet pipe 233 is fixedly connected with the opening at the lower part of the second water outlet pipe 232, and the opening of the third water outlet pipe 233 faces downwards.
Referring to fig. 2, an interlayer 21 is disposed on an inner wall of the SCR reactor body 1, a heating element 20 is disposed in an inner cavity of the interlayer 21, the heating element 20 includes a liquid storage tube 201 spirally sleeved on the inner wall of the SCR reactor body 1 and a protection tube 202 sleeved on the liquid storage tube 201, and the protection tube 202 is fixedly connected to the SCR reactor body 1.
The implementation principle of the low-nitrogen denitration device based on the SCR method in the embodiment of the application is as follows: nitrogen-containing waste gas produced in a factory enters the SCR reactor body 1 through the inlet flue 2, ammonia liquid contained in the liquid conveying pipeline 3 is sprayed into the SCR reactor body 1 through the atomizing spray gun 9 and can chemically react with the nitrogen-containing waste gas to generate nitrogen and water, the nitrogen gas containing impurity gas is filtered through activated carbon, the filtered nitrogen gas can enter air through the second filter screen 14 arranged on the box body 11, meanwhile, the cover body 16 above the box body 11 can protect the box body 11, meanwhile, the pump body 19 in the SCR reactor can spray water generated by reaction into the catalyst plate 172, the catalyst plate 172 is cleaned, and the lower part of the SCR reactor body 1 is cleaned; the heating component 20 fixedly connected with the shell of the SCR reactor body 1 and the catalytic component 17 in the SCR reactor body 1 are beneficial to the internal reaction of the SCR reactor body 1 to be more sufficient.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a low nitrogen denitrification facility based on SCR method which characterized in that: including SCR reactor body (1), entry flue (2), export flue (4) and infusion pipeline (3), SCR reactor body (1) inside is the cavity setting, first through-hole (5) and second through-hole (6) have been seted up to SCR reactor body (1) both sides, entry flue (2) pass first through-hole (5) stretch into SCR reactor body (1) inside, infusion pipeline (3) pass second through-hole (6) stretch into SCR reactor body (1) inside, third through-hole (10) have been seted up on SCR reactor body (1) upper portion, SCR reactor body (1) top fixedly connected with box body (11), export flue (4) pass third through-hole (10) and stretch into inside box body (11), export flue (4) upper portion fixedly connected with first filter screen (13), activated carbon has been placed to box body (11) inside.
2. The SCR method based low-nitrogen denitration device according to claim 1, wherein: the SCR reactor body (1) is internally provided with a catalytic assembly (17) at the lower end, the catalytic assembly (17) comprises a connecting frame (171) and a plurality of layers of catalyst plates (172) fixedly connected to the connecting frame (171), the plurality of layers of catalyst plates (172) are obliquely arranged on the connecting frame (171), and the connecting frame (171) is fixedly connected with the inside of the SCR reactor body (1).
3. The SCR method based low-nitrogen denitration device according to claim 1, wherein: the inner wall of SCR reactor body (1) is equipped with interlayer (21), is equipped with heating element (20) in the inner chamber of interlayer (21), and heating element (20) contain the scroll cover establish deposit liquid pipe (201) outside SCR reactor body (1) and overlap establish protective tube (202) outside depositing liquid pipe (201), and protective tube (202) fixed connection is on SCR reactor body (1).
4. The SCR method based low-nitrogen denitration device according to claim 1, wherein: the SCR reactor comprises an SCR reactor body (1) and is characterized in that vertical rods (15) are fixedly connected to the periphery of the outer side wall of the SCR reactor body (1) with an outlet flue (4) as the center, a cover body (16) is fixedly connected to the upper portion of each vertical rod (15), the cover body (16) is located above a box body (11), and a gap is reserved between the cover body (16) and the box body (11).
5. The SCR method based low-nitrogen denitration device according to claim 1, wherein: the SCR reactor is characterized in that a pump body (19) is arranged inside the lower portion of the SCR reactor body (1), the pump body (19) is fixedly connected to the inner side wall of the lower portion of the SCR reactor body (1), a water suction pipe (26) is fixedly arranged at the water inlet end of the pump body (19), a first water outlet pipe (23) is fixedly arranged at the water outlet end of the pump body (19), a second water outlet pipe (24) is fixedly arranged at the outer end of the first water outlet pipe (23), and an opening of the second water outlet pipe (24) faces upwards.
6. The SCR method based low-nitrogen denitration device according to claim 5, wherein: an opening is formed in the lower portion of the second water outlet pipe (24), a third water outlet pipe (25) is fixedly connected to the opening in the lower portion of the second water outlet pipe (24), and the opening of the third water outlet pipe (25) faces downwards.
7. The SCR method based low-nitrogen denitration device according to claim 1, wherein: the inner end of the inlet flue (2) is provided with a first valve (7).
8. The SCR method based low-nitrogen denitration device according to claim 1, wherein: the inner end of the liquid conveying pipeline (3) is provided with an atomizing spray gun (9) and the outer end of the liquid conveying pipeline (3) is provided with a second valve (8).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020221441382 | 2020-09-27 | ||
| CN202022144138 | 2020-09-27 |
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| CN213995448U true CN213995448U (en) | 2021-08-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114849438A (en) * | 2022-03-16 | 2022-08-05 | 冀东水泥璧山有限责任公司 | Clinker workshop deNOx systems |
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2020
- 2020-11-11 CN CN202022590793.0U patent/CN213995448U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114849438A (en) * | 2022-03-16 | 2022-08-05 | 冀东水泥璧山有限责任公司 | Clinker workshop deNOx systems |
| CN114849438B (en) * | 2022-03-16 | 2024-04-02 | 冀东水泥璧山有限责任公司 | Clinker workshop denitration system |
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