摘要
电厂煤粉锅炉燃煤过程产生的氮氧化物对环境的污染非常严重。为了降低氮氧化物(NO_x)的排放,并且利用现有的地下气化煤气气源,把煤气作为再燃燃料还原煤燃烧已生成的NO_x,研究煤气再燃还原NO_x的化学动力学特性。煤气中对NO_x还原起主要作用的气体是H_2、CO和CH_4,其比例是5.6:4.7:1,构造了一个适用于煤气再燃还原NO_x的化学反应机理(200个反应46种物质),利用该机理研究了O_2浓度、温度、初始的NO浓度、压力对煤气再燃还原NO_x的影响,并给出了计算结果,利用这些机理可以很好地预测燃烧过程中的NO_x排放特性,优化反应过程和运行参数。
Emission of NOx from coal combustion in power plant is worse. To decrease NOx emission and adequately utilize the existing coal-gas, chemical kinetics characteristics of NOx reduction with coal-gas reburning was studied. Because reducing gas of coal-gas is H2, CO and CH4 and its scale is 5.6： 4.7： 1, kinetics model that applies to study on NOx reduction with coal-gas reburning was constructed. It consists of 200 elementary reactions and 46 chemical species. Effects of 02 concentration, temperature, initial NO concentration and pressure on NOx reduction with the mechanism in a wide range of operating conditions was finished. The predictions have been got. Emission of NOx from coal combustion and optimization of reaction process and operating parameters have been predicted.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2007年第20期42-45,共4页
Proceedings of the CSEE
基金
国家重点基础研究发展规划项目(2006CB200303)~~
关键词
煤气
再燃
化学动力学特性
反应机理
NOx
coal-gas
reburning
chemical kinetics characteristic
reaction mechanism
NOx
