数值模拟在电站锅炉烟风道优化设计中的应用  

Numerical Simulation of Flow Field for Wind-box and Selective Catalytic Reduction System in Utility boiler

作　　者：赵晴川 郝军[2] 李洪泉 张晓伟 

机构地区：[1]国家电网山东电力科学研究院,山东济南250061 [2]华能烟台发电有限公司,山东烟台264000 [3]华电莱州发电有限公司,山东烟台261441 [4]华能沾化热电有限公司,山东滨州256800

出　　处：《锅炉技术》2014年第6期12-16,共5页Boiler Technology

摘　　要：分析讨论了电站锅炉烟风道的空气和烟气流动以及数值模拟方法在烟风道设计优化中的应用。燃烧系统风道设计能否保证空气分布平均一致,决定了燃烧器是否在设计条件下运行,从而决定了NOx排放水平和燃烧效率。SCR(Selective Catalytic Rednction)系统中烟道的设计能否确保进入SCR的烟气流场的均匀性,决定了SCR系统运行的效率和安全。数值模拟的方法能够分析烟风道内的流动情况,为优化改进烟风道的气流分配提供了设计和分析工具。通过实例说明数值模拟方法在锅炉风箱和SCR烟道改进优化实践中的应用。Based on the analysis and discussion of the flow characters,the numerical simulation method in the wind-box and SCR duct design and optimization is introduced.Uniform air distribution attributed to proper air system allows the burners to perform as designed to achieve the lowest possible emissions and best fuel burn-out.The evenness of induct flow in SCR system which depends on the proper gas duct design,is the key to secure SCR safe and efficiency.Numerical simulation of flow field for wind-box and SCR system in utility boiler has become an increasingly important design and analysis tool.By real examples the advantages of numerical simulation in wind-box and SCR improvements and optimization were exhibited.

关 键 词：电站锅炉 风箱 SCR 数值模拟 

分 类 号：TK223[动力工程及工程热物理—动力机械及工程]