CN203525562U - Selective non-catalytic reduction (SNCR) denitration device - Google Patents
Selective non-catalytic reduction (SNCR) denitration device Download PDFInfo
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- CN203525562U CN203525562U CN201320702396.5U CN201320702396U CN203525562U CN 203525562 U CN203525562 U CN 203525562U CN 201320702396 U CN201320702396 U CN 201320702396U CN 203525562 U CN203525562 U CN 203525562U
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Abstract
The utility model provides a selective non-catalytic reduction (SNCR) denitration device which comprises a urea solution storage tank and spray guns, and is characterized in that the urea solution storage tank is connected to the inlet end of a flow pump; the outlet of the flow pump is connected to the urea solution inlet of a metering module; the bypass outlet of the metering module is connected to the urea solution storage tank; the dilution water inlet of the metering module is connected with a dilution water module; the urea solution outlet of the metering module is connected to the inlet of a distribution module; the outlet of the distribution module is connected to the inlets of the spray guns; the distribution module and the spray guns are connected with an air compressor respectively; the urea solution storage tank, the metering module, the distribution module, the dilution water module, the flow pump, the air compressor and the spray guns are controlled by a PLC control system. According to the utility model, as the PLC control system is adopted to effectively control the concentration and flow of a urea solution, the running cost is reduced, and the nitrogen removal efficiency is improved.
Description
Technical field
The utility model belongs to generating equipment technical field, relates to a kind of coal-fired plant flue gas denitration device, is a kind of SNCR denitrification apparatus specifically.
Background technology
Coal-burning power plant's contained nitrogen oxide NOx from the flue gas of combustion system discharge can cause photochemical reaction under the effect of sunlight, forms photochemical fog, thereby causes serious atmosphere pollution.Due to the limitation of low nitrogen burning technology in stove, make the discharge of NOx can not reach gratifying degree at present, in order further to reduce the discharge of NOx, must carry out denitrating flue gas processing.Existing coal-fired plant flue gas denitrating technique mainly contains two kinds: selective catalytic reduction flue gas denitration technology (SCR) and SNCR gas denitrifying technology (SNCR).
SCR sprays into ammonia the NOx in flue gas is reduced into nitrogen G&W under metallic catalyst.Reducing agent mostly is NH
3, this method of denitration purification efficiency is high, but cost is high, and key technology difficulty is larger.
SNCR sprays into burner hearth 800-1100 ℃ warm area the reducing agent that contains NHx base, and reducing agent pyrolysis is NH
3react with NOx and generate nitrogen, this method of denitration is without catalyst, and equipment and operating cost are few, but under current denitration device NH
3consumption, reaction temperature and the time of staying are difficult to guarantee.
Summary of the invention
The problems referred to above that the utility model exists for prior art, a kind of SNCR denitrification apparatus is provided, whole denitrogenation flow process adopts full automatic control technique, denitrogenation raw material is reasonably measured, distributed and recycles, with suitable concentration and flow, in suitable humidity province, fluid bed is sprayed, improve nitric efficiency, guarantee that system stability is reliable.
The purpose of this utility model is achieved through the following technical solutions:
A SNCR denitrification apparatus, comprising: urea liquid storage tank, spray gun, is characterized in that, also configures metering module, distribution module, dilution water module, flow pump, air compressor and PLC control system, described metering module is provided with urea liquid entrance, dilution water entrance, bypass outlet and urea liquid outlet, described urea liquid storage tank is provided with feed(raw material)inlet and urea liquid outlet, the urea liquid outlet of described urea liquid storage tank is connected to the arrival end of described flow pump, described flow delivery side of pump is connected to the urea liquid entrance of described metering module, the bypass outlet of metering module is connected to the feed(raw material)inlet of urea liquid storage tank, the dilution water entrance of metering module is connected with the delivery port of described dilution water module, dilution water module is provided with the water inlet being connected with water source, the urea liquid outlet of metering module is connected to the entrance of described distribution module, the outlet of described distribution module is connected to the entrance of described spray gun, described distribution module, spray gun is also connected with air compressor respectively, described urea liquid storage tank, metering module, distribution module, dilution water module, flow pump, air compressor and spray gun are controlled by described PLC control system.
Improvement to technique scheme: described metering module comprises flowmeter and control valve.
Further improvement to technique scheme: described spray gun is at least 3, described distribution module with by pipeline, be connected with each spray gun, on described pipeline, control valve is set.
Advantage of the present utility model and good effect are:
1, the utility model system is simple: do not need to change the basic setup of existing boiler plant, and only need on the basis of existing coal-burning boiler, increase urea liquid storage tank, measuring pump, urea-spray device and jet thereof etc., system architecture is fairly simple;
2, the utility model resistance is little: the normal influence on system operation to boiler is less;
3, the utility model system floor space is little: the less urea liquid storage tank needing, can be positioned on boiler steelframe and do not need extra occupation of land budget;
4, the utility model can adopt modular integrated making, and on-the-spot installation after factory process, has saved on-the-spot set-up time and labour and consumed.
The utility model SNCR denitrification apparatus is urea to be made to the urea liquid of certain content, under the cooperation of metering module and dilution water module, complete suitable concentration and the control of flow, by distribution module, enter spray gun to fluid bed internal spraying again, urea liquid contacts with the high-temperature flue gas in bed the denitrogenation that reacted.Remaining urea liquid loops back solution storage tank, adopts PLC automatic control process, and the concentration of urea liquid, flow and spray time have been carried out to effective control, therefore, has saved operating cost, has improved nitric efficiency, makes system more reliable and more stable.
Accompanying drawing explanation
Fig. 1 is the structure chart of utility model SNCR denitrification apparatus.
In figure: 1-urea liquid storage tank, 2-flow pump, 3-metering module, 4-fluid bed, 5-spray gun, 6-distribution module, 7-air compressor, 8-dilution water module, 9-valve.
The specific embodiment
Referring to Fig. 1, the embodiment of a kind of SNCR denitrification apparatus of the utility model, comprising: urea liquid storage tank 1, spray gun 5, metering module 3, distribution module 6, dilution water module 8, flow pump 2, air compressor 7 and PLC control system.
Above-mentioned metering module 3 is provided with urea liquid entrance, dilution water entrance, bypass outlet and urea liquid outlet, above-mentioned urea liquid storage tank 1 is provided with feed(raw material)inlet and urea liquid outlet, the urea liquid outlet of urea liquid storage tank 1 is connected to the arrival end of flow pump 2, the outlet of flow pump 2 is connected to the urea liquid entrance of metering module 3, the bypass outlet of metering module 3 is connected to the feed(raw material)inlet of urea liquid storage tank 1, the dilution water entrance of metering module 3 is connected with the delivery port of dilution water module 8, and dilution water module 8 is provided with the water inlet being connected with water source.The urea liquid outlet of metering module 3 is connected to the entrance of distribution module 6, and the outlet of distribution module 6 is connected to the entrance of spray gun 5, and distribution module 6, spray gun 5 are also connected with air compressor 7 respectively.
Above-mentioned urea liquid storage tank 1, metering module 3, distribution module 6, dilution water module 8, flow pump 2, air compressor 7 and spray gun 5 are controlled by described PLC control system.
Above-mentioned metering module 3 comprises flowmeter and control valve.
Above-mentioned spray gun 5 is at least 3, described distribution module 6 with by pipeline, be connected with each spray gun 5, on described pipeline, control valve is set.
During actual motion, first with the urea liquid that urea is made certain content, be stored in urea liquid storage tank 1, start flow pump 2 urea liquid is inputted to metering module 3, and with the water proportioning of dilution water module 8 input, make the spray liquid that is applicable to concentration, in this link, unnecessary urea liquid, under the control of metering module 3, is back in urea liquid storage tank 1 through bypass outlet and valve 9.Spray liquid enters spray gun 5 with certain flow under the control of distribution module 6, under the compressed-air actuated effect producing at air compressor 7, form spray flow the high-temperature flue gas in fluid bed 4 is sprayed, urea liquid contacts with the high-temperature flue gas in fluid bed 4 denitrogenation that reacted.Owing to adopting PLC automatic control process, the concentration of urea liquid, flow and spray time have been carried out to effective control, therefore saved operating cost, improved nitric efficiency.
Certainly, above-mentioned explanation is not limitation of the present invention, and the present invention is also not limited to above-mentioned giving an example; those skilled in the art; in essential scope of the present invention, the variation of having done, remodeling, interpolation or replacement, also should belong to protection scope of the present invention.
Claims (3)
1. a SNCR denitrification apparatus, comprising: urea liquid storage tank, spray gun, is characterized in that, also configures metering module, distribution module, dilution water module, flow pump, air compressor and PLC control system, described metering module is provided with urea liquid entrance, dilution water entrance, bypass outlet and urea liquid outlet, described urea liquid storage tank is provided with feed(raw material)inlet and urea liquid outlet, the urea liquid outlet of described urea liquid storage tank is connected to the arrival end of described flow pump, described flow delivery side of pump is connected to the urea liquid entrance of described metering module, the bypass outlet of metering module is connected to the feed(raw material)inlet of urea liquid storage tank, the dilution water entrance of metering module is connected with the delivery port of described dilution water module, dilution water module is provided with the water inlet being connected with water source, the urea liquid outlet of metering module is connected to the entrance of described distribution module, the outlet of described distribution module is connected to the entrance of described spray gun, described distribution module, spray gun is also connected with air compressor respectively, described urea liquid storage tank, metering module, distribution module, dilution water module, flow pump, air compressor and spray gun are controlled by described PLC control system.
2. according to SNCR denitrification apparatus claimed in claim 1, it is characterized in that, described metering module comprises flowmeter and control valve.
3. according to the SNCR denitrification apparatus described in claim 1 or 2, it is characterized in that, described spray gun is at least 3, described distribution module with by pipeline, be connected with each spray gun, on described pipeline, control valve is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320702396.5U CN203525562U (en) | 2013-11-08 | 2013-11-08 | Selective non-catalytic reduction (SNCR) denitration device |
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| CN201320702396.5U CN203525562U (en) | 2013-11-08 | 2013-11-08 | Selective non-catalytic reduction (SNCR) denitration device |
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| CN203525562U true CN203525562U (en) | 2014-04-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104707467A (en) * | 2015-03-20 | 2015-06-17 | 南通康海机床有限公司 | SNCR (selective non-catalytic reduction) denitration system for cement kiln |
| CN107051169A (en) * | 2017-04-07 | 2017-08-18 | 大唐环境产业集团股份有限公司 | A kind of SNCR denitration device |
| CN107428610A (en) * | 2015-03-04 | 2017-12-01 | Khd洪保德韦达克有限公司 | It is used for the method and apparatus for making bypass gases denitrogenation in the device of production clinker, in the multiphase system in mixing chamber |
-
2013
- 2013-11-08 CN CN201320702396.5U patent/CN203525562U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107428610A (en) * | 2015-03-04 | 2017-12-01 | Khd洪保德韦达克有限公司 | It is used for the method and apparatus for making bypass gases denitrogenation in the device of production clinker, in the multiphase system in mixing chamber |
| CN104707467A (en) * | 2015-03-20 | 2015-06-17 | 南通康海机床有限公司 | SNCR (selective non-catalytic reduction) denitration system for cement kiln |
| CN107051169A (en) * | 2017-04-07 | 2017-08-18 | 大唐环境产业集团股份有限公司 | A kind of SNCR denitration device |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20211108 |
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| CF01 | Termination of patent right due to non-payment of annual fee |