煤的挥发分对NO_x再燃特性的研究  

Study on NO_x Reduction During Reburning Coal with Volatiles

作　　者：钟北京[1] 傅维标[1] 

机构地区：[1]清华大学工程力学系,北京100084

出　　处：《燃烧科学与技术》2000年第2期185-189,共5页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目! (5 96 0 6 0 1 1 )

摘　　要：燃料再燃是降低烟气中 NOx排放最有效的炉内措施之一。以成分为 CO2 =16.8% ,O2 =1.95% ,NO=0 .1%和平衡气体 N2 组成的模拟烟气为对象 ,研究不同挥发分组分 ( CH4,C2 H2 和 C2 H4)作为再燃燃料时 ,再燃工况(空气过量系数和再燃温度 )对 NOx 还原过程和还原率的影响。通过计算发现 ,不同的挥发分组分、再燃区空气过量系数及再燃区温度对 NOxWT5”BZ]Reburning is an effective in furnace NO x control process.This paper studies the influence of coal volatile compositions (CH 4,C 2H 2 and C 2H 4) and the reburning conditions (excess air and temperature) on NO x reduction in the reburning zone.A simulated flue gas from the first combustion zone consisting of CO 2(16.8%),O 2(1.95%),NO(0.1%) and balance gas N 2 was used.It is found from calculated results that different volatile compositions,stoichiometric ratio and temperature in the reburning zone have important influence on the reburning process and NO x reduction ratio. [WT5”HZ]

关 键 词：燃料再燃 挥发份 氧化氮排放 煤 

分 类 号：TQ534.9[化学工程—煤化学工程]