Numerical study on effect of staged oxy-fuel combustion on NOx production in wall type tangentially fired boiler

ZHAO Xinghai; BAI Guisheng

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Numerical study on effect of staged oxy-fuel combustion on NOx production in wall type tangentially fired boiler

Thermal Power Generation Issue 4, (2017)

更新时间：2025-09-28

- Numerical study on effect of staged oxy-fuel combustion on NOx production in wall type tangentially fired boiler
- 作者机构：
  
  东北电力大学能源与动力工程学院,吉林,吉林,132012
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK16
- Published Online：26 April 2017，
  
  Published：2017
- 稿件说明：
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ZHAO Xinghai, BAI Guisheng. Numerical study on effect of staged oxy-fuel combustion on NOx production in wall type tangentially fired boiler[J]. Thermal Power Generation, 2017, (4).
DOI：

ZHAO Xinghai, BAI Guisheng. Numerical study on effect of staged oxy-fuel combustion on NOx production in wall type tangentially fired boiler[J]. Thermal Power Generation, 2017, (4). DOI：

摘要

针对某电厂超临界660 MW机组墙式切圆燃煤锅炉，通过在空气分级燃烧技术上运用富氧燃烧的方法，对炉内温度场以及NOx排放特性进行了数值模拟研究。结果表明：在25%、28%、30%富氧工况下，30%富氧工况表现出与电厂实际空气工况运行下良好的一致性，且炉膛火焰充满度更好，比采用空气分级燃烧稳定；再循环烟气中高摩尔分数的CO2与煤焦反应加剧了还原性气氛，且煤粉气流在还原区停留时间的增大提高了NOx污染物向N2的转化，减少了NOx生成量；墙式切圆燃烧煤粉锅炉采用分级富氧燃烧后炉膛出口NOx生成量由原来的236 mg/m3降低为125 mg/m3，较空气分级燃烧降低了47.03%。

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