CN204799107U - A ammonia injection grid for industry flue gas selective catalytic reduction denitrification facility - Google Patents
A ammonia injection grid for industry flue gas selective catalytic reduction denitrification facility Download PDFInfo
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- CN204799107U CN204799107U CN201520476953.5U CN201520476953U CN204799107U CN 204799107 U CN204799107 U CN 204799107U CN 201520476953 U CN201520476953 U CN 201520476953U CN 204799107 U CN204799107 U CN 204799107U
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- catalytic reduction
- selective catalytic
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Abstract
The utility model discloses an ammonia injection grid for industry flue gas selective catalytic reduction denitrification facility, including spouting the female pipe of ammonia and spouting ammonia barrier pipe, ammonia injection grid set up in in denitrification facility's the flue, the flue cross -section on divide into nine regions that the area is the same. The ammonia injection grid homogeneity that both can guarantee to spout ammonia, can effectively prevent stifled anticorrosion again, optimize nitrogen oxide's in ammonia and the flue gas homogeneous mixing effect, improved denitration efficiency to ammonia escape rate has effectively been reduced.
Description
Technical field
The utility model relates to a kind of ammonia-spraying grid for industrial smoke SCR (SCR) denitrification apparatus, belongs to industrial smoke selective catalytic reduction field.
Background technology
The industrial smoke produced at modern industry comprises the various dissimilar atmosphere pollutions such as sulfur dioxide, nitrogen oxide, flue dust and carbon dioxide usually.Along with the raising day by day of environmental protection consciousness, in the multiple industries such as electric power, chemical industry, iron and steel, cement, need the discharge capacity effectively controlling to reduce nitrogen oxide in industrial smoke, adopt gas denitrifying technology, equipment for denitrifying flue gas is set in boiler plant.
Gas denitrifying technology, because of its principle difference, comprises multiple distinct methods.Wherein, industrial smoke SCR (SCR) denitration technology is one of most widely used general, the most reliable mainstream technology in the gas denitrifying technology of current electric power, metallurgy, chemical industry.The operation principle of SCR (SCR) denitration technology is under the effect of catalyst, select ammoniacal liquor or liquefied ammonia as reducing agent, and spray into after it is mixed with air in Benitration reactor front end smoke canal, and the reduction of nitrogen oxide the most at last in flue gas becomes nitrogen and water, to realize the object of denitration.Selective catalytic reduction possesses skills that maturation, structure are simple, stable performance, the technical characterstic such as reliable, make it be used widely in the industrial flue gas cleaning process of nitrogen-containing oxide.
The nucleus equipment of SCR (SCR) denitrification apparatus comprises SCR (SCR) reactor and ammonia-spraying grid.Wherein, the Main Function of ammonia-spraying grid sprays into equably in flue gas by ammonia or containing ammonia air.Ammonia-spraying grid conventional in prior art is made up of many parallel spray ammonia pipes, and every root spray ammonia pipe arranges some ammonia nozzles.But, in actual industrial production, the ammonia spraying amount difference of the different ammonia nozzles on different spray ammonia pipe is larger, add the impact of the composite factor such as flue gas flow rate skewness in the on-way resistance of pipeline, flue cross section, cause the distributed pole of ammonia on flue cross section uneven, have a strong impact on denitration efficiency, and increase the escaping of ammonia rate.
The increase of the escaping of ammonia rate not only can reduce denitration efficiency, and the blocking of denitrification apparatus also can be caused to corrode.Therefore, be badly in need of a kind of reasonable in design, new ammonia-spraying grid that application is suitable, ensure the Homogeneous phase mixing of ammonia in flue and nitrogen oxide, improve denitration efficiency further, and reduce the escaping of ammonia rate.
Summary of the invention
The purpose of this utility model utilizes Fluent engineering fluid mechanics software to simulate flue gas flow field characteristic, according to analog result, flue cross section is divided into nine same area, the optimization of ammonia-gas spraying device is realized by reasonable Arrangement spray ammonia pipeline, nozzle and valve, both the uniformity of spraying ammonia can have been ensured, again can effective anti-blocking corrosion protection, optimize the mix uniformly effect of ammonia and nitrogen oxides in effluent, improve denitration efficiency, and effectively reduce the escaping of ammonia rate.
For achieving the above object, ammonia-spraying grid of the present utility model adopts following design:
A kind of ammonia-spraying grid for industrial smoke selective catalytic reduction denitration device, comprise spray ammonia mother's pipe and spray ammonia barrier pipe, described ammonia-spraying grid is arranged in the flue of described denitrification apparatus, nine regions that described flue cross section is divided into area identical, described each region is provided with spray ammonia mother's pipe and spray ammonia barrier pipe, one end of the female pipe of described spray ammonia is connected with described spray ammonia barrier pipe, and the other end pools a spray ammonia house steward;
Wherein, described spray ammonia barrier pipe is provided with ammonia nozzle, the female pipe of described spray ammonia is provided with female pipe control valve, described spray ammonia house steward is provided with house steward's control valve.
In a preferred scheme, the female pipe of every root spray ammonia connects 8 spray ammonia barrier pipes.
In a preferred scheme, equally spacedly on described spray ammonia barrier pipe be provided with ammonia nozzle.
In a preferred scheme, the tube pitch of described spray ammonia barrier pipe is 250-300mm.
In a preferred scheme, the caliber of described spray ammonia barrier pipe is 50-70mm.
In a preferred scheme, described spray ammonia barrier pipe is thick-walled pipe.
In a preferred scheme, the wall thickness of described spray ammonia barrier pipe is 5-8mm.
In a preferred scheme, the spacing of described ammonia nozzle is 100-400mm.
In a preferred scheme, the aperture of described ammonia nozzle is 10-20mm.
In a preferred scheme, described spray ammonia house steward, spray ammonia mother manage and the material of spray ammonia barrier pipe is steel.
In a preferred scheme, described female pipe control valve and house steward's control valve are flap valve.
In a preferred scheme, according to flue gas flow field characteristic and NO
xthe difference of concentration, the ammonia spraying amount in nine described regions is by described female pipe control valve regulation and control respectively.
Compared with existing ammonia-spraying grid technology, the utility model has following characteristics:
(1) nine regions will flue cross section being divided into area identical, each region is provided with spray ammonia mother's pipe and spray ammonia barrier pipe, the female pipe of every bar spray ammonia is provided with female pipe control valve, the ammonia spraying amount of each subregion of regulation and control can be distinguished by female pipe control valve, make ammonia spraying amount subregion on flue cross section adjustable, optimize the mix uniformly effect of ammonia and nitrogen oxides in effluent, improve denitration efficiency, and effectively reduce the escaping of ammonia rate.
(2) the female pipe of every root spray ammonia is connected 8 spray ammonia barrier pipes, add the quantity of spray ammonia barrier pipe.Be provided with ammonia nozzle by equally spaced on spray ammonia barrier pipe, the spacing of ammonia nozzle be set to 100-400mm, the aperture of ammonia nozzle is set to 10-20mm.The tube pitch of spray ammonia barrier pipe is set to 250-300mm, and caliber is set to 50-70mm.The optimization of ammonia-gas spraying device is achieved by reasonable Arrangement spray ammonia pipeline, nozzle and valve.
Structure of the present utility model is simple, novel in design, is arranged, effectively can reduce the escaping of ammonia rate, improve denitration efficiency, prevent equipment corrosion by the subregion in flue cross section, ensures the uniformity of ammonia distribution in flue further.By reasonably optimizing ammonia-gas spraying device, realize regional optimal spray ammonia effect.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 is the overlooking surface figure of the utility model for the ammonia-spraying grid of industrial smoke selective catalytic reduction denitration device;
Fig. 2 is the profile of the utility model for the ammonia-spraying grid of industrial smoke selective catalytic reduction denitration device.
Wherein, 1 is spray ammonia house steward, and 2 is spray ammonia mother pipe, and 3 is female pipe control valve, and 4 is house steward's control valve, and 5 is spray ammonia barrier pipe, and 6 is ammonia nozzle.
Detailed description of the invention
The utility model relates to a kind of ammonia-spraying grid for industrial smoke selective catalytic reduction denitration device, comprise spray ammonia mother's pipe (2) and spray ammonia barrier pipe (5), described ammonia-spraying grid is arranged in the flue of described denitrification apparatus, nine regions that described flue cross section is divided into area identical, described each region is provided with spray ammonia mother's pipe (2) and spray ammonia barrier pipe (5), one end of described spray ammonia mother's pipe (2) is connected with described spray ammonia barrier pipe (5), and the other end pools spray ammonia house steward (1);
Wherein, described spray ammonia barrier pipe is provided with ammonia nozzle (6), described spray ammonia mother's pipe (2) is provided with female pipe control valve (3), described spray ammonia house steward is provided with house steward's control valve (4).
Wherein every root spray ammonia mother's pipe (2) connects 8 sprays ammonia barrier pipe (5); Described spray ammonia barrier pipe (5) is above equally spaced is provided with ammonia nozzle (6); The tube pitch of described spray ammonia barrier pipe (6) is 250-300mm, and caliber is 50-70mm, thick-walled pipe, and wall thickness is 5-8mm; The spacing of described ammonia nozzle (6) is 100-400mm, and aperture is 10-20mm; The material that described spray ammonia house steward (1), spray ammonia mother manage (2) and spray ammonia barrier pipe (5) is steel; Described female pipe control valve (3) and house steward's control valve (4) are flap valve.
Ammonia-spraying grid of the present utility model, utilizes Fluent engineering fluid mechanics software to simulate flue gas flow field characteristic, flue cross section subregionization is arranged.Can according to flue gas flow field characteristic and NO
xthe difference of concentration, by female pipe control valve (3) regulation and control ammonia spraying amount respectively.Ammonia-spraying grid structure involved by the utility model is simple, controllability strong, adapts to various flue gas flow field characteristic, reduces amount of ammonia slip, improves desulfuration efficiency.
Claims (8)
1. the ammonia-spraying grid for industrial smoke selective catalytic reduction denitration device, comprise spray ammonia mother's pipe and spray ammonia barrier pipe, it is characterized in that, described ammonia-spraying grid is arranged in the flue of described denitrification apparatus, nine regions that described flue cross section is divided into area identical, described each region is provided with spray ammonia mother's pipe and spray ammonia barrier pipe, one end of the female pipe of described spray ammonia is connected with described spray ammonia barrier pipe, the other end pools a spray ammonia house steward, and described spray ammonia barrier pipe is provided with ammonia nozzle.
2. a kind of ammonia-spraying grid for industrial smoke selective catalytic reduction denitration device according to claim 1, is characterized in that, the female pipe of described spray ammonia is provided with female pipe control valve, described spray ammonia house steward is provided with house steward's control valve.
3. a kind of ammonia-spraying grid for industrial smoke selective catalytic reduction denitration device according to any one of claim 1-2, is characterized in that, the female pipe of every root spray ammonia connects 8 spray ammonia barrier pipes.
4. a kind of ammonia-spraying grid for industrial smoke selective catalytic reduction denitration device according to claim 1, is characterized in that, equally spacedly on described spray ammonia barrier pipe is provided with ammonia nozzle.
5. a kind of ammonia-spraying grid for industrial smoke selective catalytic reduction denitration device according to claim 1, is characterized in that, the tube pitch of described spray ammonia barrier pipe is 250-300mm.
6. a kind of ammonia-spraying grid for industrial smoke selective catalytic reduction denitration device according to claim 1, is characterized in that, the caliber of described spray ammonia barrier pipe is 50-70mm.
7. a kind of ammonia-spraying grid for industrial smoke selective catalytic reduction denitration device according to claim 1, is characterized in that, described spray ammonia house steward, spray ammonia mother manage and the material of spray ammonia barrier pipe is steel.
8. a kind of ammonia-spraying grid for industrial smoke selective catalytic reduction denitration device according to claim 1, is characterized in that, described female pipe control valve and house steward's control valve are flap valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520476953.5U CN204799107U (en) | 2015-07-06 | 2015-07-06 | A ammonia injection grid for industry flue gas selective catalytic reduction denitrification facility |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520476953.5U CN204799107U (en) | 2015-07-06 | 2015-07-06 | A ammonia injection grid for industry flue gas selective catalytic reduction denitrification facility |
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| CN204799107U true CN204799107U (en) | 2015-11-25 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106345298A (en) * | 2016-10-14 | 2017-01-25 | 南京博沃科技发展有限公司 | SCR denitration device as well as ammonia spraying adjustment device and ammonia spraying adjustment method thereof |
| CN106390743A (en) * | 2016-10-13 | 2017-02-15 | 浙江天地环保科技有限公司 | Counter-current forced mixing ammonia spraying apparatus |
| CN107456869A (en) * | 2017-10-10 | 2017-12-12 | 贵州黔西中水发电有限公司 | A kind of ammonia-spraying grid for thermal power plant denitrification apparatus |
| CN109173714A (en) * | 2018-10-17 | 2019-01-11 | 浙江德创环保科技股份有限公司 | Low temperature SCR denitration system, device, method |
| CN109433010A (en) * | 2018-12-03 | 2019-03-08 | 中国华电科工集团有限公司 | A kind of gas turbine SCR method denitrating flue gas ammonia-spraying grid device |
| CN112717689A (en) * | 2019-10-28 | 2021-04-30 | 国家电投集团远达环保工程有限公司重庆科技分公司 | Selective catalytic reduction denitration device and method |
-
2015
- 2015-07-06 CN CN201520476953.5U patent/CN204799107U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106390743A (en) * | 2016-10-13 | 2017-02-15 | 浙江天地环保科技有限公司 | Counter-current forced mixing ammonia spraying apparatus |
| CN106345298A (en) * | 2016-10-14 | 2017-01-25 | 南京博沃科技发展有限公司 | SCR denitration device as well as ammonia spraying adjustment device and ammonia spraying adjustment method thereof |
| CN106345298B (en) * | 2016-10-14 | 2019-03-29 | 南京博沃科技发展有限公司 | A kind of SCR denitration device, its spray ammonia regulating device and its spray ammonia method of adjustment |
| CN107456869A (en) * | 2017-10-10 | 2017-12-12 | 贵州黔西中水发电有限公司 | A kind of ammonia-spraying grid for thermal power plant denitrification apparatus |
| CN109173714A (en) * | 2018-10-17 | 2019-01-11 | 浙江德创环保科技股份有限公司 | Low temperature SCR denitration system, device, method |
| CN109433010A (en) * | 2018-12-03 | 2019-03-08 | 中国华电科工集团有限公司 | A kind of gas turbine SCR method denitrating flue gas ammonia-spraying grid device |
| CN112717689A (en) * | 2019-10-28 | 2021-04-30 | 国家电投集团远达环保工程有限公司重庆科技分公司 | Selective catalytic reduction denitration device and method |
| CN112717689B (en) * | 2019-10-28 | 2022-07-08 | 国家电投集团远达环保工程有限公司重庆科技分公司 | Selective catalytic reduction denitration device and method |
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