CN203043831U - Reducing agent injection device used for SNCR (Selective Non-Catalytic Reduction) denitration - Google Patents
Reducing agent injection device used for SNCR (Selective Non-Catalytic Reduction) denitration Download PDFInfo
- Publication number
- CN203043831U CN203043831U CN 201220676011 CN201220676011U CN203043831U CN 203043831 U CN203043831 U CN 203043831U CN 201220676011 CN201220676011 CN 201220676011 CN 201220676011 U CN201220676011 U CN 201220676011U CN 203043831 U CN203043831 U CN 203043831U
- Authority
- CN
- China
- Prior art keywords
- reducing agent
- injection device
- sncr
- cooling air
- agent injection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 238000002347 injection Methods 0.000 title claims abstract description 36
- 239000007924 injection Substances 0.000 title claims abstract description 36
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 30
- 238000010531 catalytic reduction reaction Methods 0.000 title abstract description 3
- 238000001816 cooling Methods 0.000 claims abstract description 19
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 6
- 239000003546 flue gas Substances 0.000 abstract description 6
- 239000007921 spray Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Abstract
The utility model relates to a reducing agent injection device used for SNCR (Selective Non-Catalytic Reduction) flue gas denitration, belonging to the field of SNCR flue gas denitration. The reducing agent injection device comprises a reducing agent interface 1, a compressed air interface 2, a cooling air interface 3, a reducing agent pipeline 4, a compressed air pipeline 5, a cooling air casing 6, a mixing pipeline 7, a nozzle 8, a connecting flange 9 and a fixing flange 10. The cooling air casing is additionally arranged on an outer layer of the injection device, so that a spray gun can be effectively prevented from being burnt down in a high-temperature environment, the service life of the device is prolonged, and the reducing agent injection device is economical and applicable. The nozzle at the head of the injection device adopts threaded connection so as to be convenient to replace nozzles with different specifications and meet the requirements on different injection angles. The reducing agent injection device is reasonable in structure, enhances the reliability of the injection device, and has important significance for the generalization and application of an SNCR process.
Description
Technical field
The utility model relates to the denitrating flue gas field, particularly the injection apparatus of reducing agent in SNCR (SNCR) denitrating system.
Background technology
Along with " thermal power plant's atmosphere pollutants emission standards " promulgation (GB13223-2011), China is stricter to the emission request of the nitrogen oxide (NOx) that fire coal produces.For gas denitrifying technology, using more at present is selective catalytic reduction (SCR) and SNCR (SNCR).SCR technology denitration efficiency height can reach more than 85%, is widely used in big-and-middle-sized thermal power plant denitrating flue gas; SNCR technology denitration efficiency is medium, can reach about 40%, because its initial investment is few, short construction period gets more and more and is applied to middle-size and small-size power plant, and cement industry denitrating flue gas field.
The injection of reducing agent injection device is as part important in the SNCR denitrating system, and its structural behaviour is most important to the influence of denitration efficiency.The subject matter of SNCR denitrating system existence at present has: the reducing agent atomizing effect that (1) sprays in the burner hearth is not good, causes reducing agent and smoke reaction incomplete, and denitration efficiency is on the low side, and the escaping of ammonia is higher; (2) reaction temperature of SNCR denitrating technique the best zone is 800-1100 ℃, and injection apparatus is installed in this temperature range, and the phenomenon of being burnt happens occasionally, and need integral replacing, and renewal cost is higher.Therefore the performance and the reliability that improve injection apparatus are significant to applying of SNCR technology.
Summary of the invention
The purpose of this utility model is exactly in order to solve the deficiency that prior art exists, a kind of injection of reducing agent injection device that effectively is used for the SNCR denitration to be provided.
Purpose of the present invention is achieved through the following technical solutions:
A kind of injection of reducing agent injection device for the SNCR denitration comprises reducing agent interface 1, compressed air interface 2, cooling air interface 3, reducing agent pipeline 4, compressed air line 5, cooling air sleeve pipe 6, mixed pipe line 7, nozzle 8, adpting flange 9, mounting flange 10.
Whole injection apparatus is fixed on the furnace wall by mounting flange 10, and the injection apparatus skin installs the cooling air sleeve pipe additional, and the nozzle of injection apparatus head adopts and is threaded.Reducing agent enters mixed pipe line 7 through reducing agent pipeline 4, and flow velocity diminishes, compressed air is through compressed air line 5, enter mixed pipe line 7 by the circular hole that is circular layout on the mixed pipe line 7, reducing agent fully mixes at mixed pipe line 7 with compressed air, by nozzle 8 atomized sprays in burner hearth.Compressed air line 5 is connected by adpting flange 9 with cooling air sleeve pipe 6, and cooling air cools off whole injection apparatus by cooling air sleeve pipe 6, avoids high temperature to burn.
Compared with prior art, this technology has following advantage:
1, can strengthen the atomizing effect of reducing agent, produce superfine atomizing particle, thereby effectively promote the reaction of reducing agent and flue gas, improve denitration efficiency, reduce the escaping of ammonia.
2, the injection apparatus skin installs the cooling air sleeve pipe additional, can prevent effectively that spray gun from being burnt in hot environment, has improved the service life of device, and is economic and practical.
3, the nozzle of injection apparatus head adopts and is threaded, and is convenient for changing the nozzle of different size, satisfies the requirement of different spray angles.
Description of drawings
Accompanying drawing is structural representation of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in detail.
As shown in the figure, injection apparatus is fixed on the furnace wall by mounting flange 10, the injection apparatus skin installs the cooling air sleeve pipe additional, and the nozzle of injection apparatus head adopts and is threaded.Reducing agent, compressed air, cooling air external pipeline are connected with injection apparatus by reducing agent interface 1, compressed air interface 2, cooling air interface 3 respectively.Reducing agent enters mixed pipe line 7 through reducing agent pipeline 4, flow velocity diminishes, compressed air is through compressed air line 5, enter mixed pipe line 7 by the circular aperture that is circular layout on mixed pipe line 7 tube walls, reducing agent fully mixes at mixed pipe line 7 with compressed air, by nozzle 8 atomized sprays in burner hearth.Compressed air line 5 is connected by adpting flange 9 with cooling air sleeve pipe 6, and the cooling air cools off whole injection apparatus by cooling air sleeve pipe 6, avoids high temperature to burn.
Claims (2)
1. injection of reducing agent injection device that is used for the SNCR denitration, comprise reducing agent interface (1), compressed air interface (2), cooling air interface (3), reducing agent pipeline (4), compressed air line (5), cooling air sleeve pipe (6), mixed pipe line (7), nozzle (8), adpting flange (9), mounting flange (10) is characterized in that: the injection apparatus skin installs the cooling air sleeve pipe additional.
2. SNCR denitrification reducing agent injection apparatus as claimed in claim 1 is characterized in that: the nozzle of injection apparatus head adopts and is threaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220676011 CN203043831U (en) | 2012-11-30 | 2012-11-30 | Reducing agent injection device used for SNCR (Selective Non-Catalytic Reduction) denitration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220676011 CN203043831U (en) | 2012-11-30 | 2012-11-30 | Reducing agent injection device used for SNCR (Selective Non-Catalytic Reduction) denitration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203043831U true CN203043831U (en) | 2013-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220676011 Expired - Lifetime CN203043831U (en) | 2012-11-30 | 2012-11-30 | Reducing agent injection device used for SNCR (Selective Non-Catalytic Reduction) denitration |
Country Status (1)
| Country | Link |
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| CN (1) | CN203043831U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103657894A (en) * | 2013-12-06 | 2014-03-26 | 北京京能电力股份有限公司石景山热电厂 | Atomizing nozzle for urea-pyrolysis ammonia preparation process and solution atomizing device |
| CN104001634A (en) * | 2014-05-23 | 2014-08-27 | 浙江莱梦德电力设备有限公司 | Spray gun for desulfurization and denitrification |
| CN105879601A (en) * | 2016-06-25 | 2016-08-24 | 南通神马线业有限公司 | Fluidized bed boiler denitration device |
| CN107126831A (en) * | 2017-06-20 | 2017-09-05 | 佛山市三水新明珠建陶工业有限公司 | A kind of injector for SNCR denitration system |
-
2012
- 2012-11-30 CN CN 201220676011 patent/CN203043831U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103657894A (en) * | 2013-12-06 | 2014-03-26 | 北京京能电力股份有限公司石景山热电厂 | Atomizing nozzle for urea-pyrolysis ammonia preparation process and solution atomizing device |
| CN103657894B (en) * | 2013-12-06 | 2017-04-19 | 北京京能电力股份有限公司石景山热电厂 | Solution atomizing device for urea-pyrolysis ammonia preparation process |
| CN104001634A (en) * | 2014-05-23 | 2014-08-27 | 浙江莱梦德电力设备有限公司 | Spray gun for desulfurization and denitrification |
| CN105879601A (en) * | 2016-06-25 | 2016-08-24 | 南通神马线业有限公司 | Fluidized bed boiler denitration device |
| CN107126831A (en) * | 2017-06-20 | 2017-09-05 | 佛山市三水新明珠建陶工业有限公司 | A kind of injector for SNCR denitration system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130710 |
|
| CX01 | Expiry of patent term | ||
| DD01 | Delivery of document by public notice |
Addressee: Patents of Beijing Beike Ouyuan Technology Co.,Ltd. The person in charge Document name: Notice of termination upon expiration of patent right |
|
| DD01 | Delivery of document by public notice |