流化床煤燃烧喷氨过程中氮氧化物生成与分解  

Formation and Decomposition of Nitrogen Oxide with Ammonia Injection during Coal Combustion in a Fluidized Bed

作　　者：刘皓[1] 陆继东[1] 冯波[1] 刘德昌[1] 

机构地区：[1]煤燃烧国家重点实验室

出　　处：《华中理工大学学报》1996年第12期70-73,共4页Journal of Huazhong University of Science and Technology

基　　金：国家自然科学基金;国家教委"跨世纪优秀人才计划"基金;清华大学煤的高效低污染燃烧国家重点实验室开放基金

摘　　要：在流化床实验台上进行了温度、ＮＨ３／ＮＯ摩尔比、氧量等对ＮＯ消减及Ｎ２Ｏ生成与分解影响的实验，并进行了多相催化还原反应喷氨脱硝实验，对其机理进行了分析，结果表明，影响喷氨脱硝过程ＮＯ消减率及Ｎ２Ｏ的生成与分解的最重要因素是温度和氧浓度．氧量和温度变化中，都有一个ＮＯ消减率最大值，石灰石和床灰对喷氨脱硝具有一定的催化作用，多相催化还原使ＮＯ的还原温度有所降低。Experiments for finding out the influences of the temperature, the molar ratio of NH 3 to NO, the oxygen concentration on the reduction of NO and N 2O were performed on a small fluidized bed combustor. NO x reduction during ammonia injection through heterogeneous catalytic reaction was also investigated and the mechanism analyzed. The results show that the most important factors affecting the reduction and formation of NO and N 2O are temperature and oxygen concentration. There is a maximum NO reduction when either the temperature or oxygen concentration is varied. Limestone and bed ash exert some catalytic effect on NO reduction. Heterogeneous catalytic reduction makes the temperature of NO disoxidation decrease and NO reduction maintain a relatively high level within a comparatively wide temperature range.

关 键 词：煤燃烧 燃烧 流化床 氮氧化物生成 喷氨技术 

分 类 号：TK16[动力工程及工程热物理—热能工程] TQ534.9[化学工程—煤化学工程]