670t/h燃贫煤锅炉NO_x排放及稳燃特性的工业试验研究  

Industrial experiment on the NO_x emission and steady-state combustion characteristics of a 670 t/h lean coal-fired boiler

作　　者：果志明[1] 秦明[2] 李争起[2] 成庆刚[1] 庄国忠[1] 张寅[1] 孙绍增[2] 

机构地区：[1]北京国电龙高科环境工程技术有限公司工程部,黑龙江哈尔滨150001 [2]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001

出　　处：《中国电力》2004年第8期14-18,共5页Electric Power

摘　　要：为降低一台670t/h燃用贫煤锅炉NO_x排放并提高锅炉稳燃性能,采用水平浓淡风煤粉燃烧器技术对4层一次风进行了改造。通过炉内空气动力场测量和锅炉的燃烧调整,使锅炉NO_x排放量较改前降低了37.9％。研究了不同配风方式、给粉方式及入炉总风量变化对NO_x排放量和固体未完全燃烧热损失的影响,对燃用贫煤的锅炉的运行和改造具有一定参考作用。To reduce the NO_x emission and improve the combustion stability of a 670 t/h lean coal--fired boiler, the horizontal rich/leanpulverized coal (PC) burners were adopted to replace all the original 4 levels of PC burners. And through the furnace aerodynamic test andcombustion adjustment of the boiler, its NO_x emission was reduced by 37.9% as compared with before. The secondary air distribution,pulverized coal distribution and total air influence on NO_x emission and solid unburned loss were studied. The retrofitting experience wouldhave some reference role for the operation and retrofit of boiler firing lean coal.

关 键 词：贫煤锅炉 水平浓淡风煤粉燃烧器 NOX排放 

分 类 号：TK227[动力工程及工程热物理—动力机械及工程]