浓淡煤粉燃烧器双通道速度差对NOx排放的影响  

Effect of Velocity Difference of Two Channels in Biased Pulverized-coal Concentration Burners on NO_x Emissions

作　　者：安恩科[1] 杨震[2] 宋谦[1,3] 周海珠[1,4] 

机构地区：[1]同济大学热能与环境工程研究所,上海200092 [2]上海锅炉厂有限公司,上海200245 [3]中国海城工程科技股份有限公司第三咨询设计所,上海200032 [4]中国建筑科学研究院上海分院,上海200032

出　　处：《同济大学学报（自然科学版）》2009年第4期537-539,共3页Journal of Tongji University:Natural Science

基　　金：上海市科委重大科技资助项目(07dz12005)

摘　　要：对350 MW电站四角切圆煤粉锅炉燃烧过程和煤粉燃烧器气固两相流的数值计算表明,常规浓淡煤粉燃烧器的双通道速度差为6～9 m·s^(-1),因此,提出了等速型浓淡煤粉燃烧器的概念.等速型浓淡煤粉燃烧器比常规直流煤粉燃烧器可减少21.8%的NO_x排放,比常规浓淡煤粉燃烧器也可降低11.3%的NO_x排放.Combustion in a 350MW tangentially coal-fired boiler and gas-solid flow of pulverized-coal burners are simulated. The numerical results show that the velocity difference of two channels are 6-9 m · s^-1 in conventional biased pulverized-coal concentration burners. A biased pulverized-coal concentration burner with the same velocity of two channels is proposed, NOx emissions of which is 21.8% lower than that of the conventional linear flow pulverized coal burners, 11.3% lower than that of the conventional biased pulverized coal concentration burners.

关 键 词：:煤粉燃烧器 双通道速度差 风煤比 

分 类 号：TK229.6[动力工程及工程热物理—动力机械及工程]