旋流燃烧器结构及参数对NO_x排放质量浓度的影响  

Influence of Combustion Air Distribution on Boiler Furnace Slagging and NO_x Emission

作　　者：黄隽佳[1] 蔡世林[1] 曹汉鼎[1] 

机构地区：[1]上海发电设备成套设计研究院,上海200240

出　　处：《发电设备》2012年第4期234-238,共5页Power Equipment

摘　　要：对一台采用旋流燃烧器的锅炉进行数值模拟,讨论了二次风出口径向速度、浓淡方式、浓淡比和外二次风率对NOx排放质量浓度的影响;并对原有的钝体进行改进,得到了浓淡效果更佳的钝体形状和位置。将计算得到的最佳参数和燃烧器改造结合,得到了NOx排放质量浓度最低的参数组合。By numerical simulation on a boiler with swirl burners, the effects of following factors on mass concentration of NOx emission have been analyzed, such as the radial velocity at outlet of secondary air, the bias mode, the dense dilute ratio and the external secondary air ratio, etc. The original bluff body has been modified, during which reasonable shape and position of bluff body with better bias effect is obtained. By combining the calculated optimal parameters and the retrofitted burner structure, an optimal parameter combination is obtained, in which case the lowest mass concentration of NOx emission can be reached.

关 键 词：旋流燃烧器 NOx排放质量浓度 扩口角度 钝体 外二次风率 

分 类 号：TK223.23[动力工程及工程热物理—动力机械及工程]