空气分级与加湿燃烧NO生成特性模拟  

Simulation of NO generation of air stage and humidification combustion

作　　者：郭帅飞 张群力[1,2,3] 赵文强 刘涛 郭颖杰 丁剑红 GUO Shuaifei;ZHANG Qunli;ZHAO Wenqiang;LIU Tao;GUO Yingjie;DING Jianhong(Beijing Key Lab of Heating,Gas Supply,Ventilating and Air Conditioning Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;School of Energy and Environment Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Energy Conservation&Sustainable Urban and Rural Development Provincial and Ministry Co-construction Collaboration Innovation Center,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Wharton Technologies(Shanghai)Co.,Ltd.,Shanghai 201100,China)

机构地区：[1]北京建筑大学供热、供燃气、通风及空调工程北京市重点实验室,北京100044 [2]北京建筑大学环境与能源工程学院,北京100044 [3]北京建筑大学北京节能减排与城乡可持续发展省部共建协同创新中心,北京100044 [4]沃顿节能科技(上海)有限公司,上海201100

出　　处：《化学工程》2023年第10期1-6,共6页Chemical Engineering(China)

基　　金：北京建筑大学博士研究生科研能力提升项目(DG2023010);北京建筑大学研究生创新项目(PG2022070)。

摘　　要：为降低燃气锅炉排烟中的氮氧化物,达到燃气锅炉排烟要求,采用CHEMKIN中2段PFR(柱塞流反应器)模型,模拟空气加湿与分级燃烧方式下燃气锅炉的降氮性能,并对影响NO生成的反应做敏感性分析。结果表明:在空气分级基础上,模型入口助燃空气加湿,会进一步降低模型出口NO摩尔分数。复合燃烧方式下,2段PFR模型入口助燃空气均加湿的降氮效果最佳,可提高7.4%的降氮率。同时,模型燃烧温度降低,可将降氮率提高到65.7%,相比于单独空气分级燃烧降氮率提高了22.1%,空气分级与加湿燃烧能够有效降低锅炉排烟中NO摩尔分数。In order to reduce the nitrogen oxides in the exhaust gas of the gas boiler,meeting the requirements of the boiler exhaust gas,the two-stage PFR model in CHEMKIN was used to simulate the nitrogen reduction performance of gas boilers under air humidification and air-staged combustion,and the sensitivity analysis was made for the reaction of generating NO.The results show that on the basis of air-staged combustion,humidification of air at the inlet of the model can further reduce the mole fraction at the outlet of the model.Under the composite combustion mode,the nitrogen reduction effect of humidification of the inlet air of the two-stage PFR models is the best,which increases the nitrogen reduction rate by 7.4%.At the same time,reducing the model combustion temperature can increase the nitrogen reduction rate to 65.7%,and the nitrogen reduction rate is increased by 22.1%compared with air stage combustion.Air stage and humidification combustion can effectively reduce the NO mole fraction in boiler exhaust gas.

关 键 词：燃气锅炉 氮氧化物 CHEMKIN 低氮排放 空气分级与加湿 

分 类 号：TK11[动力工程及工程热物理—热能工程]