摘要
概述了煤燃烧中空气分级燃烧技术,分析了NOx生成的影响因素。影响NOx形成的主要锅炉操作参数为:初级燃烧区化学计量比为0.7～0.9,停留时间较长时,NOx的生成量较少;温度的影响与环境的氧化/还原气氛有关;增加过量空气,NOx生成量增加。影响NOx生成的最主要的煤性质是氮含量和挥发分,氮含量的影响与燃烧所采用的控制技术有关,随挥发分含量增加,NOx的生成量减少。
It makes an overview of factors which may impact NOx generation during coal combustion and discusses the impact of air staged combustion, boiler operating conditions and coal specifications to the generation of NOx. Regarding boiler operation parameters, while the primary zone stoichiometry is about 0.7 to 0.9 and with a relatively long retention time the NOx emissions are comparatively small. The change of temperature is associated with the oxidation/ reduction conditions of the environment, NOx emissions ...
出处
《煤化工》
CAS
2008年第6期22-25,29,共5页
Coal Chemical Industry
关键词
煤
燃烧
NOx
影响
pulverized coal
combustion
NOx
influence
