分解炉内NO生成与NH_3脱硝的数值模拟研究  

Numerical Simulation of NO Formation and Removal with Ammonia in a Precalciner of Coal Combusition

作　　者：李秀秀[1] 肖国先[1] 李洋[1] 赵俊[1] 

机构地区：[1]苏州大学材料与化学化工学部,苏州215123

出　　处：《武汉理工大学学报》2010年第1期86-89,共4页Journal of Wuhan University of Technology

摘　　要：在计算流体力学的基础上,以FLUENT软件为平台,对喷腾型燃煤分解炉内NO产生过程、生成机理和炉底喷氨的脱硝效果进行了数值模拟研究。模拟结果表明:分解炉内温度分布均匀,NO在煤粉燃烧区域内形成,NO按生成机理可分为热力型NO和燃料型NO,但主要以燃料型NO为主;采用炉底喷氨的方法,可显著降低分解炉排放的NO量,当入炉烟气中NH3含量为8%时,脱硝率可达到89.8%,为水泥分解炉脱硝技术与装置开发提供参考。Based on computational fluid dynamics,numerical simulation of a spouted precalciner of coal combustion was carried out for NO distribution,formation mechanism and NO removal efficiency of ammonia as a reducer by using FLUENT software.The results showed that the distribution of temperature was almost uniform,NO was formed around the district of coal combustion,thermal NO and fuel NO were two formation ways and the fuel NO was the main type of NO way in a precalciner.Besides,when ammonia was injected from the bottom of the precalciner,the NO emission was reduced obviously.The NO removal efficiency could reach eighty nine percent with eight percent concentration of ammonia in the flue gas,which would be feasible to develop NO removal technique and equipment for the precalciner.

关 键 词：NO 煤粉燃烧 分解炉 数值模拟 

分 类 号：TQ172[化学工程—水泥工业]