摘要
为减少煤粉锅炉炉膛出口NO_x含量以达到工业排放要求,以Fluent软件为计算平台,对某公司蒸发量为400 t/h的四角切圆煤粉锅炉炉内速度场、温度场及NO_x浓度场进行仿真研究。结果表明,均等配风为最佳二次风配风方式;均等配风方式下,燃尽风风量占二次风风量为20%是最佳优化工况,最佳优化工况炉膛出口NO_x含量降低了11.50%,且满足炉内燃烧要求。
In order to reduce the NO_x content of pulverized coal boiler hearth outlet section to meet the requirements of industrial emissions,the velocity field and temperature field and NO_x concentration field in a 400 t/h tangentially pulverized coal boiler furnace are studied by simultion based on software Fluent. Results show that uniform air distribution is the best way of secondary air distribution; under the uniform air distribution,overfired air volume accounts for 20% of secondary air volume is the best optimized condition,the NO_x content of furnace outlet section of the best optimized condition reduced by 11.50% and the best optimized condition can meet the requirements of burning in furnace.
作者
徐校鹏
黄学章
张家元
XU Xiaopeng HUANG Xuezhang ZHAGN Jiayuan(School of Energy Science and Engineering, Central South University, Changsha 410083, China)
出处
《工业加热》
CAS
2016年第6期26-30,34,共6页
Industrial Heating
关键词
煤粉锅炉
NOx
仿真
配风方式
燃尽风
pulverized coal boiler
NOx
simulation
air distribution
overfired air
