300MW旋流对冲燃煤锅炉燃烧与排放数值模拟  

Numerical Simulation of Combustion and Pollutant Generation Process in 300MW Swirl-opposed Firing Boiler

作　　者：郭建民[1] 刘石[1] 姜凡[1] 

机构地区：[1]中国科学院工程热物理研究所

出　　处：《锅炉技术》2006年第4期44-48,54,共6页Boiler Technology

基　　金：国家863高技术基金项目(2003AA529290)

摘　　要：数值模拟是研究锅炉燃烧与污染物排放的一种有效研究方法。利用Fluent软件,对一台300 MW旋流对冲燃煤锅炉在不同工况下进行了数值计算,模拟结果与锅炉热态试验数据进行了比较,两者吻合情况较好。结果表明:在燃烧器出口处形成了高温区,使得煤粉着火及时,燃烧器区域维持较高温度。温度场同各组分浓度场有着对应关系,NOx的生成主要在炉膛的高温区域,沿炉膛高度方向NOx浓度逐渐降低。It is an effective way to apply Fluent software to study on the emission of pollutant and combustion in opposed firing boiler. Different cases were simulated with a mathematical model. The comparison between the simulation and the measurement of hot test shows a good coincidence. The results illustrate that a high temperature zone is formed at outlet of RBC opposed firing burner, which makes pulverized coal ignition more favorable. The gas temperature at burner region is the highest. Each species, mass fraction have close relation with the temperature distribution. A great deal of NOr is generated in the high temperature zone. With increase of furnace height, NOr concentration decreases.

关 键 词：动力机械工程 旋流对冲锅炉 燃烧 排放特性 数值模拟 

分 类 号：TK229.6[动力工程及工程热物理—动力机械及工程]