二次风调整对CFB锅炉飞灰含碳量的影响  

Effect of secondary air ratio on the carbon content of fly ash of CFB boiler

作　　者：郑捷庆[1] 何宏舟[1] 邹峥[1] 杨炎财[2] 

机构地区：[1]集美大学机械工程学院 [2]江苏大学流体中心,江苏镇江212013

出　　处：《现代化工》2007年第S2期447-449,451,共4页Modern Chemical Industry

基　　金：福建省科技计划重点资助项目(2006H0088);福建省自然科学基金资助项目(E0410027)

摘　　要：在工业热态CFB锅炉上测试了过量空气系数和二次风率变化对锅炉飞灰含碳量的影响。试验发现,燃烧福建无烟煤CFB锅炉飞灰含碳量随着过量空气系数的增加而降低;当燃烧空气量较少时(λ<1.25),二次风率变化对飞灰含碳量的影响不显著:随着二次风率增加,飞灰含碳量缓慢减少;但当总过量空气系数较大时(λ>1.25),飞灰含碳量随二次风率的增大而迅速降低。An industrial experiment were conducted to test the influence of excess air coefficient and secondary air ratio on the carbon content of fly ash of CFB boiler burning Fujian anthracite.It was found that the carbon content in fly ash decreased with the enhancement of excess air ratio.when the total excess air coefficient is relatively lower and the combustion air is not abundance,that is,λ<1.25,the variation of secondary air ratio exert no evident influence on the carbon content of fly ash:with the secondary air ratio increase,the carbon content in fly ash decrease slowly;but when the total excess air coefficient increase to big enough,λ>1.25,the carbon content in fly ash decrease rapidly.

关 键 词：无烟煤 CFB锅炉 二次风率 飞灰 

分 类 号：TK229.66[动力工程及工程热物理—动力机械及工程]