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SNCR denitration spray gun

A spray gun and denitrification technology, which is applied in the field of SNCR denitrification spray gun, can solve the problems such as the decline of denitrification effect of SNCR process, affecting the service life of the spray gun, and affecting the atomization effect of the spray gun, so as to delay the aging of the gun body, prolong the service life and improve the cooling effect. effect of effect

Pending Publication Date: 2018-05-01
常州五王电机有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The atomization effect of the spray gun is one of the core technologies of the SNCR process. To achieve a better denitrification effect, the ammonia must be evenly distributed in the flue at a suitable temperature and at a suitable position. The better the atomization effect of the spray gun, The easier it is to obtain high denitrification efficiency. The denitrification temperature is between 850°C and 1150°C. The position of the opening is at the entrance of the cyclone at the furnace outlet. The temperature at this position can reach the temperature of the denitrification reaction. The temperature of the spray gun will be too high, which will accelerate the aging of the gun body, seriously affect the service life of the spray gun, and affect the atomization effect of the spray gun, resulting in the decline of the denitrification effect of the SNCR process.

Method used

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  • SNCR denitration spray gun

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: as figure 1 The SNCR denitrification spray gun shown includes an inner nozzle 1 and an outer nozzle 2 outside the inner nozzle 1. The outer nozzle 2 is an integral package structure, which prevents the inner nozzle 1 from being eroded and worn by flue gas and prolongs the service life. , the front end of the inner nozzle 1 is provided with an inner nozzle, the front end of the outer nozzle 2 is provided with an outer nozzle with a cover outside the inner nozzle, and the outer nozzle cover is arranged outside the inner nozzle to avoid the erosion and wear of the flue gas, and to avoid the impact of the flue gas on the fog Influenced by the chemical effect, the inner nozzle pipe 1 is provided with a spiral inner nozzle cooling passage 1.1, the spiral direction of the inner nozzle cooling passage 1.1 is toward the front end of the spray gun, and the outer nozzle 2 is provided with a spiral outer spray The pipe cooling channel 2.1, the spiral direction of the ...

Embodiment 2

[0017] Embodiment 2: as figure 1 The SNCR denitrification spray gun shown includes an inner nozzle 1 and an outer nozzle 2 outside the inner nozzle 1. The outer nozzle 2 is an integral package structure, which prevents the inner nozzle 1 from being eroded and worn by flue gas and prolongs the service life. , the front end of the inner nozzle 1 is provided with an inner nozzle, the front end of the outer nozzle 2 is provided with an outer nozzle with a cover outside the inner nozzle, and the outer nozzle cover is arranged outside the inner nozzle to avoid the erosion and wear of the flue gas, and to avoid the impact of the flue gas on the fog Influenced by the chemical effect, the inner nozzle pipe 1 is provided with a spiral inner nozzle cooling passage 1.1, the spiral direction of the inner nozzle cooling passage 1.1 is toward the front end of the spray gun, and the outer nozzle 2 is provided with a spiral outer spray Pipe cooling channel 2.1, the spiral direction of the oute...

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PUM

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Abstract

The invention belongs to the technical field of SNCR denitration equipment, and particularly relates to an SNCR denitration spray gun. The SNCR denitration spray gun comprises an inner spray pipe andan outer spray pipe, wherein the outer spray pipe is arranged outside the inner spray pipe; an inner spray nozzle is arranged at the front end of the inner spray pipe; the front end of the outer spraypipe is provided with an outer spray nozzle covering the outside of the inner spray nozzle; each of an inner spray pipe body and an outer spray pipe body is provided with a spiral cooling passage; the spiral directions of the outer spraying pipe cooling passage and the inner spraying pipe cooling passage are opposite; the spray gun can be timely cooled; the service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of SNCR denitration equipment, and in particular relates to an SNCR denitration spray gun. Background technique [0002] The SNCR process is the most widely used technology for denitrification. Most of them use ammonia water or urea to become a solution after being dissolved as a reducing agent. The ammonia water is evenly distributed in the flue at a temperature range of about 900 ° C, and the chemical reaction is quickly completed in a high temperature environment. , decompose NOx into nitrogen and water. The denitrification efficiency can reach 50-75%, some even as high as 80%. It is currently the most successful denitrification method recognized internationally. [0003] The atomization effect of the spray gun is one of the core technologies of the SNCR process. To achieve a better denitrification effect, the ammonia must be evenly distributed in the flue at a suitable temperature and at a suitable pos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/79B01D53/56
CPCB01D53/56B01D53/79
Inventor 刘国杰陈俊杰
Owner 常州五王电机有限公司