Experimental study of ammonia-injected denitrification at high-temperature reduction zone based on air classification

WU Qinglong; LU Xu; CHEN Delong; YAN Wanjun

doi:10.19666/j.rlfd.202007205

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Experimental study of ammonia-injected denitrification at high-temperature reduction zone based on air classification

Thermal Power Generation Vol. 50, Issue 5, Pages: 127-132(2021)

更新时间：2025-09-28

- Experimental study of ammonia-injected denitrification at high-temperature reduction zone based on air classification
- 作者机构：
  
  1. 西安热工研究院有限公司
  2. 国家能源集团泰州发电有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202007205
  CLC： X701
- Published：2021
- 稿件说明：
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WU Qinglong, LU Xu, CHEN Delong, et al. Experimental study of ammonia-injected denitrification at high-temperature reduction zone based on air classification[J]. Thermal Power Generation, 2021, 50(5): 127-132.
DOI：

WU Qinglong, LU Xu, CHEN Delong, et al. Experimental study of ammonia-injected denitrification at high-temperature reduction zone based on air classification[J]. Thermal Power Generation, 2021, 50(5): 127-132. DOI： 10.19666/j.rlfd.202007205.

摘要

基于空气分级的高温喷氨脱硝技术具有较高的脱硝效率

且无氨逃逸

为实现炉内脱硝提供了新的途径。在某台液态排渣旋风锅炉上开展了空气分级燃烧协同高温喷氨脱硝试验

结果表明:采用分级配风且主燃区过量空气系数为0.8时

NO_x生成质量浓度可降低35%;高温喷氨的温度窗口为1 200～1 600℃

最佳喷氨点在旋风筒出口

氨氮摩尔比为2.0时脱硝效率达到最大值20%;燃用烟煤的旋风锅炉采用空气分级协同高温喷氨后

NO_x排放质量浓度可降低到490 mg/m~3。

Abstract

Air classification combined with high temperature ammonia-injection denitrification has high denitrification efficiency and no ammonia escape

which provides a new way to realize denitrification in furnace. The experiment of air classification combined with high temperature ammonia-injection denitrification was carried out in a liquid slag-discharging cyclone furnace. The results show that

the NO_x generation mass concentration can be reduced by 35% when the excess air coefficient of main combustion zone is 0.8. The temperature window of high temperature ammonia-injection is 1 200～1 600 ℃. The optimum ammonia-injection point is at the outlet of cyclone. When the ammonia-nitrogen ratio is 2.0

the denitrification efficiency reaches 20%(the maximum). When the bituminous was burned and air classification combined with high temperature ammonia-injection denitrification was adopted in the cyclone furnace

the mass concentration of NO_x emission can be reduced to 490 mg/m~3.

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