烟气再循环对蓄热式平焰燃气炉内燃烧特性的影响  

Effects of flue gas recirculation on combustion characteristic in flat flame gas stove of HTAC

作　　者：陈伟鹏[1,2] 张欢[2] 谢智辉 赵增武 李保卫 武文斐[1,2] 

机构地区：[1]白云鄂博矿稀土及铌资源高效利用省部共建重点实验室,内蒙古包头014010 [2]内蒙古科技大学能源与环境学院,内蒙古包头014010

出　　处：《重庆大学学报（自然科学版）》2015年第2期118-122,共5页Journal of Chongqing University

基　　金：国家科技部重大基础研究前期研究专项资助项目(2005CCA00600);国家自然科学基金资助项目(50464004);内蒙古自治区自然科学基金资助项目(2011MS0707)~~

摘　　要：平焰燃烧与蓄热式燃烧技术一起使用时火焰温度较高,热力型氮氧化物生成量较大。采用烟气再循环技术是降低蓄热式燃烧过程中热力型氮氧化物的生成量的有效途径之一。文中采用蓄热式平焰燃气试验炉、综合烟气分析仪、热电偶等设备,对比研究了采用烟气再循环和不采用烟气再循环2种工况下平展流火焰特性、炉顶温度分布和烟气中NO生成特性。结果表明:采用烟气再循环使平展流火焰面暗区变小,燃烧区域扩大,火焰面温度分布更加均匀,烟气中NO浓度明显降低,火焰面峰值温度降低9℃,谷值温度升高37℃,NO浓度最大降幅为20%。The flame temperature is higher and thermal NOx generation is bigger when flat flame combustion and the regenerative combustion technology are used together. Flue gas recirculation is one of the effective ways to reduce thermal NOx generation in the process of HTAC. Flame features, furnace top temperature distribution and generating characteristic of NO with and without flue gas recirculation are studied by means of flat flame gas stove of HTAC and analytical instruments for flue gas and thermocouple. The results show that flue gas recirculation make dark area of flat flame smaller, burning area expand, flame temperature distribution more uniform and NO concentration in flue gas obviously decrease. Peak temperature decreases 9 ℃ ,valley value of temperature increases 37 ℃, and the maximum NO concentration reduces 20 %.

关 键 词：燃气炉 NO 平焰燃烧 烟气再循环 蓄热式燃烧 

分 类 号：TK16[动力工程及工程热物理—热能工程]