1000MW超超临界四角切圆塔式锅炉燃烧器摆角变化对NO_x排放影响的数值模拟  

Effect Numerical Simulation of 1 000MW Ultra-Supercritical Tangential Tower Boiler Burner Swing Angles on NOxEmission

作　　者：齐晓娟[1] 丁历威[1] 潘国清[1] 李凤瑞[1] 李剑[1] 张明[1] 熊建国[1] 

机构地区：[1]国网浙江省电力公司电力科学研究院,杭州310014

出　　处：《电力与能源》2015年第3期297-300,共4页Power & Energy

摘　　要：利用CFD软件平台,以宁海电厂1 000 MW超超临界四角切圆塔式煤粉锅炉作为研究对象,在其它运行参数不变的情况下,通过改变燃烧器摆角,分析燃烧器摆角变化对炉膛内温度场、气相组分浓度场以及NOx排放的影响。计算结果显示随着燃烧器摆角的增大,炉膛火焰中心上移,NOx还原区高度减少,导致NOx排放浓度随着摆角的上摆急剧上升,数值模拟结果与试验结果一致。The computational fluid dynamics（CFD）software is employed to simulate numerically the combustion process in a 1 000 MW Ultra-supercritical tangential tower boiler in Ninghai Electric Power Plant.With the other operating parameters fixed,this research analyzes the effects of burner swing angle changes on the hearth temperature field,species concentration distribution and NOx emission.As the calculation results show,the furnace flame center moves up and NOxreduction zone height declines with the burner swing angles increase;consequently,the NOxemission concentration rises with the increase of burner swing angle.The numerical simulation results are consistent with the test results.

关 键 词：超超临界 切圆燃烧 塔式锅炉 燃烧器摆角 NOX排放 

分 类 号：TK222[动力工程及工程热物理—动力机械及工程]