四角切圆燃烧锅炉燃烧和污染物排放数值模拟  

Numerical simulation of combustion and nitrogen oxides generation process in tangentially fired furnace

作　　者：潘维[1] 池作和[1] 李戈[1] 岑可法[1] 

机构地区：[1]浙江大学热能工程研究所能源清洁利用与环境教育部重点实验室,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2004年第6期761-764,共4页Journal of Zhejiang University：Engineering Science

基　　金：国家重点基础研究发展规划项目(G1999022204--03);全国优秀博士论文专项基金资助.

摘　　要：借助FLUENT软件平台,对镇海电厂一台200MW四角切圆燃烧锅炉炉内流动、燃烧,以及污染物NOx的生成进行了三维数值模拟.计算结果表明,整个炉膛空间存在着旋转流场,炉内最高温度出现在燃烧器区域.温度场与各组分浓度分布有着对应关系,高温区对应CO高浓度区和CO2和O2的低浓度区.NOx的生成主要在炉膛的高温区.在炉膛中心,NOx大量生成且沿着炉膛的高度方向,浓度逐渐降低.Numerical simulation of flow, combustion and nitrogen oxides generation process in Zhenhai 200 MW tangentially fired furnace was performed on FLUENT software platform and the results showed the existence of a swirl flow field in the boiler. The temperature of burner zone was the highest. Each species, mass fraction had close relation with the temperature distribution. The high temperature zone was characterized by high carbon monoxide concentration, and the oxygen concentration zone was characterized by low carbon dioxide concentration. A deal of nitrogen oxides was generated in the high temperature zone. With increase of furnace height, nitrogen oxides concentration decreased.

关 键 词：四角切圆燃烧锅炉 数值模拟 污染物排放 燃烧 NOx 网格划分 

分 类 号：TK223.7[动力工程及工程热物理—动力机械及工程]