Experimental study on combustion and NO<sub>x</sub> emission characteristics of Zhehun blended coal

LIN Zhenmin; WANG Zhihua; LIU Jing; GE Lichao; ZHANG Yanwei; ZHANG Qin; ZHOU Junhu; CEN Kefa

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Experimental study on combustion and NO_x emission characteristics of Zhehun blended coal

Thermal Power Generation Vol. 43, Issue 5, Pages: 44-48(2014)

更新时间：2025-09-28

- Experimental study on combustion and NO_x emission characteristics of Zhehun blended coal
- 作者机构：
  
  1. 浙江大学能源清洁利用国家重点实验室
  2. 浙江能源集团有限公司
  3. 浙江大学能源清洁利用国家重点实验室
  4. 浙江能源集团有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK227.1
- Published：2014
- 稿件说明：
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LIN Zhenmin, WANG Zhihua, LIU Jing, et al. Experimental study on combustion and NO_x emission characteristics of Zhehun blended coal[J]. Thermal Power Generation, 2014, 43(5): 44-48.
DOI：

LIN Zhenmin, WANG Zhihua, LIU Jing, et al. Experimental study on combustion and NO_x emission characteristics of Zhehun blended coal[J]. Thermal Power Generation, 2014, 43(5): 44-48. DOI：

摘要

某电厂对420t/h锅炉进行了低NOx燃烧器改造

为此对改造用浙混煤的燃烧和NO释放特性进行了机理性研究。结果表明:不同升温速率下

污染物气体的释放特性基本相同

提高升温速率有利于提高煤样的反应活性

燃烧特性有所改善

但会造成燃烧过程滞后

NO2的析出提前;随着沉降炉过量空气系数α的增大

浙混煤的NO排放浓度显著增加

α在0.8~1.2时其影响最为显著;随着燃烧温度的增加

无论在氧化性气氛还是还原性气氛下浙混煤NO排放浓度均增大

而且在氧化性气氛下增长幅度更大。

Abstract

On the basis of low NOxburner retrofit in a 420t/h boiler

the combustion mechanism and NOxemission characteristics of Zhehun blended coal was studied.The TG-FTIR analysis system was used to investigate the combustion and NOxemission characteristics of Zhehun blended coal

and a drop-tube furnace was applied to study the NOxemission characteristics at different temperatures and with different excess air coefficients.The results show that

the gas emissions during thermogravimetric analysis under different heating rates are basically the same.Increasing the heating rate is conducive to enhancing the reactivity of coal samples and improving the combustion characteristics.On the other hand

it will also make the combustion lag and NO2release earlier.The NOx emissions increase significantly with the excessive air coefficientα

especially whenαranges from 0.8to 1.2.With an increase in combustion temperature

the NOxemission increases

either in an oxidizing atmosphere or a reducing one

and there exists a greater increase in an oxidizing atmosphere.

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Experimental study on combustion and NOx emission characteristics of Zhehun blended coal

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摘要

Abstract

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Experimental study on combustion and NO_x emission characteristics of Zhehun blended coal