水泥回转窑内NO生成的模拟  

Numerical simulation of NO formation in cement rotary kiln

作　　者：王世杰[1] 陆继东[1] 李卫杰[1] 任合斌[1] 李捷[1] 胡芝娟[2] 

机构地区：[1]华中科技大学煤燃烧国家重点实验室,湖北武汉430074 [2]天津水泥工业设计研究院,天津300400

出　　处：《化工学报》2006年第11期2631-2637,共7页CIESC Journal

基　　金：国家高技术研究发展计划项目(2002AA529150).~~

摘　　要：采用气固流动、煤粉燃烧和NO生成模型,结合物料烧成过程的物理化学反应热效应的一维热流函数,对采用4通道燃烧器的某3000t·d-1生产能力的全尺寸水泥回转窑内NO的生成进行了数值模拟研究,对水泥回转窑内NO生成机理及分布规律进行深入的分析.研究结果表明:水泥回转窑内NO生成主要为热力型NO和燃料型NO,并且以热力型NO为主要生成方式,燃料NO主要在窑头的燃烧带产生,热力NO主要产生于高温烧成带,并且燃料NO与热力NO的生成过程存在着相互抑制作用.Based on a set of mathematical models describing the physical and chemical processes （gas solid flow, pulverized coal combustion, zone heat flux of clinker, and NO formation and reduction） in a cement rotary kiln, the distributions of gas temperature and gas components （O2, CO, NO） were obtained by numerical simulation of a 3000 t ·d^-1 full scale cement rotary kiln with four channel burner. Besides, the mechanisms of NO formation and reduction in the cement rotary kiln were analyzed. The results indicated that the amount of NO mainly came from thermal NO and fuel NO. Thermal NO played a dominant role in the NO amount. Fuel NO was mainly formed in the combustion zone, while thermal NO was mainly formed in the high temperature sintering zone. In addition, mutual inhibition existed in the formation process of fuel NO and thermal NO.

关 键 词：水泥回转窑 NO生成 数值模拟 

分 类 号：TQ534.9[化学工程—煤化学工程]