化工学报 ›› 2010, Vol. 61 ›› Issue (1): 159-165.

• 能源和环境工程 • 上一篇    下一篇

O2/N2、O2/CO2和O2/CO2/NO气氛下煤粉燃烧NOx排放特性

张永春，张军，盛昌栋，赵亮，谢芳，陈洁，刘杨先   

  1. 东南大学能源与环境学院
  • 出版日期:2010-01-05 发布日期:2010-01-05

NOx emission characteristics of pulverized coal combustion in O2/N2，O2/CO2 and O2/CO2/NO atmospheres

ZHANG Yongchun，ZHANG Jun，SHENG Changdong，ZHAO Liang，XIE Fang，CHEN Jie，LIU Yangxian   

  • Online:2010-01-05 Published:2010-01-05

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摘要：

利用滴管炉研究了O2/N2、O2/CO2和O2/CO2/NO气氛下煤燃烧过程中NOx的排放特性。实验结果表明，在O2/N2和O2/CO2气氛下，高温或高O2浓度均使NO排放量增加。O2/CO2气氛下NO排放量比O2/N2气氛下NO排放量低大约30%～40%。在O2/CO2/NO气氛下，温度不同时，O2浓度变化对NO排放量的影响规律不同，对循环NO降解的影响规律也不同。高温不利于循环NO降解。随停留时间的延长NO排放量出现两个峰值。

关键词:

O2/CO2气氛, 煤粉燃烧, NOx排放, 循环NO

Abstract:

NOx emission characteristics during pulverized coal combustion in O2/CO2，O2/N2 and O2/CO2/NO atmospheres were studied by using a drop tube furnace.The results showed that in the O2/N2，atmosphere NO emission increased with the increase of O2 concentration or temperature.The same tendency of NOx emission was also found in the O2/CO2 atmosphere.However，the NOx emission in the O2/CO2 atmosphere was 30%—40% lower than that in the O2/N2 atmosphere.In the O2/CO2/NO atmosphere，the effects of O2 concentration on NOx emission as well as on recycled-NO reduction were different at different temperatures.High temperature did not favor recycled-NO reduction.There were two peak values of NOx emission with the increase of residence time.

Key words:

O2/CO2气氛, 煤粉燃烧, NOx排放, 循环NO

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