Effect of spray gun's atomizing parameter on denitration efficiency of SNCR system in CFB boilers

JIANG Baobao; CHI Zuohe; WANG Jinqing; ZHANG Guangxue

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Effect of spray gun's atomizing parameter on denitration efficiency of SNCR system in CFB boilers

更新时间：2025-09-28

- Effect of spray gun's atomizing parameter on denitration efficiency of SNCR system in CFB boilers
- Thermal Power Generation Vol. 44, Issue 5, Pages: 45-49(2015)
- 作者机构：
  
  中国计量学院计量测试工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： X773
- Published：2015
- 稿件说明：
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JIANG Baobao, CHI Zuohe, WANG Jinqing, et al. Effect of spray gun's atomizing parameter on denitration efficiency of SNCR system in CFB boilers[J]. Thermal power generation, 2015, 44(5): 45-49.
DOI：

JIANG Baobao, CHI Zuohe, WANG Jinqing, et al. Effect of spray gun's atomizing parameter on denitration efficiency of SNCR system in CFB boilers[J]. Thermal power generation, 2015, 44(5): 45-49. DOI：

摘要

还原剂喷枪是影响非选择性催化还原法(SNCR)脱硝系统效果的重要因素。为此

对1台75t/h高温分离循环流化床(CFB)锅炉在不同喷枪下进行了脱硝试验

并在实验室研究了雾化枪喷射速度和雾化粒径对SNCR脱硝效率的影响。结果表明:在锅炉满负荷时

喷枪出力80kg/h下

扇形喷枪的脱硝效率比圆锥形喷枪高9%~11%

且在氨氮比不变的情况下

脱硝效率随喷枪出力的增大均有提高;扇形喷枪喷射速度比圆锥形喷枪大2.8m/s

雾化粒径比圆锥形喷枪小9~16μm

更有利于提高脱硝效率。

Abstract

Reducing agent spraying gun is an important factor influencing denitrification efficiency of the SNCR system.Thus

denitration experiments were carried out on a 75t/h high temperature separation circulation CFB boiler

with different spray guns.Moreover

the effect of jet velocity and particle size on denitration efficiency of the SNCR system was experimentally studied in lab-scale.The engineering test results show that

under full load condition and the spray gun output of 80kg/h

the denitration efficiency of the fan gun was about 9%to 11% higher than that of the conical gun.Furthermore

with a constant ammonia nitrogen ratio

denitration efficiency of both guns increased with the gun output.The laboratory test results show that

compared with the conical gun

the fan gun's spray velocity was 2.8m/s higher and its atomized particle size was about 17μm to 28μm smaller

indicating it is more helpful to enhancing the denitration efficiency.

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