反应物喷入条件对常温空气无焰燃烧的影响  

Effect of Reactant Injection Conditions on Normal Temperature Air Flameless Combustion

作　　者：黄章俊[1] 刘正伟 田红[1,3] 胡章茂[1] 王飞飞[4] 米建春[3] Huang Zhangjun;Liu Zhengwei;Tian Hong;Hu Zhangmao;Wang Feifei;Mi Jianchun(School of Energy and Power Engineering,Changsha University of Science and Technology,Changsha 410114,China;Operation Department,Huadian Qingdao Power Generation Corporation Limited,Qingdao 266031,China;State Key Laboratory for Turbulence and Complex Systems,Peking University,Beijing 100871,China;School of Environment Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]长沙理工大学能源与动力工程学院,长沙410114 [2]华电青岛发电有限公司运行部,青岛266031 [3]北京大学湍流与复杂系统国家重点实验室,北京100871 [4]华中科技大学环境科学与工程学院,武汉430074

出　　处：《燃烧科学与技术》2019年第4期297-303,共7页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(51706022);湖南省自然科学基金资助项目(2018JJ2442);湖南省教育厅优秀青年资助项目(16B001);湖南省教育厅科学研究资助项目(15C0035)

摘　　要：针对工业锅炉中气体燃料燃烧过程,采用数值模拟与实验相结合的方法,研究了C3H8燃料和常温空气通过平行圆管喷嘴类型的燃烧器在不同喷入条件下对炉膛内无焰燃烧的温度变化趋势和燃烧产物的影响.结果表明,在燃料和空气入口流量保持不变的情况下,空气喷嘴孔数或燃料喷嘴孔径增加将加剧炉内局部燃烧,导致燃烧峰值温度和出口NO浓度升高;随着燃烧器空气喷嘴与燃料喷嘴间距增加,炉内峰值温度和出口NO浓度下降;炉内峰值温度不超过1900K时,有利于实现低氮氧化物排放的常温空气无焰燃烧.For the combustion process of gas fuel in an industrial boiler,combination of numerical simulation and experimental analysis was adopted to study the influence of C3 H8 fuel and air at normal temperature on the temperature’s changing trend and combustion products of flameless combustion in a furnace using a burner with parallel pipe nozzles under different injection conditions.The results illustrate that when the fuel and air inlet flow rates remained unchanged,an increase in the number of air nozzle holes or the fuel nozzle diameter will intensify some local combustion,which leads to a rise of peak combustion temperature in the furnace and an increasd in the outlet NO concentration as well. As the distance between the fuel burner nozzle and air nozzles increased,the peak temperature in the furnace declined,which leads to a reduction of the outlet NO concentration.A normal temperature air flameless combustion with low NOx emissions can be achieved if the peak temperature in the furnace was not higher than 1 900 K.

关 键 词：无焰燃烧 炉温分布 NO排放 喷入条件 数值模拟 

分 类 号：TK224.1[动力工程及工程热物理—动力机械及工程]