摘要
为研究负荷与燃尽风对NO排放的协同作用规律,对一台1025t/h煤粉锅炉的燃烧过程进行了数值模拟,分析了不同负荷下,投运、停运燃尽风时炉内的温度、热力型NO与燃料型NO的分布特性,将计算结果与实测结果进行了对比,结果表明,对于所研究的锅炉,燃尽风可更有效控制燃料型NO的排放,而且在100%负荷下效果更显著。在80%负荷下,燃尽风还可降低热力型NO排放;在100%负荷时,燃尽风的投入对炉内O2、CO影响显著;在80%负荷时,燃尽风对温度场影响更显著。
To study the concerted action regularity of loads and burn-out air flow on NO emissions,a numerical simulation was performed of the combustion process of a 1025 t/h pulverized coal boiler.The distribution characteristics of the in-furnace temperature,thermodynamic type NO and fuel type NO were analyzed under different operating conditions when the burn-out air flow was put into use and disused.The calculation results were compared with the actual measured ones.The research results show that for the boiler under investigation,the burn-out air flow can more effectively control the emissions of fuel type NO,and at 100% load,the effectiveness is more conspicuous.At 80% load,the burn-out air flow can also reduce the NO emissions of the thermodynamic type.At 100% load,the burn-out air feed has a notable influence on the O2 and CO in the furnace,while at 80% load,the burn-out air flow exercises a more conspicuous influence on the temperature field.
出处
《热能动力工程》
CAS
CSCD
北大核心
2009年第3期326-331,共6页
Journal of Engineering for Thermal Energy and Power
关键词
煤粉锅炉
负荷
燃尽风
数值模拟
氮氧化物
pulverized coal boiler,load,burn-out air flow,numerical simulation,nitrogen oxide
