中间仓储式热风送粉贫煤锅炉低氮燃烧器改造  

Retrofit of low-nitrogen burner in lean coal boiler with storage-type hot air pulverized coal feeding system

作　　者：杨海勇 熊显巍 冉桂林 YANG Haiyong;XIONG Xianwei;RAN Guilin(CEE Leaway(Wuhan) Energy Technology Company Limited, Wuhan 430000,China;Shanghai Power Equipment Research Institute Company Limited, Shanghai 200240, China)

机构地区：[1]中节环立为(武汉)能源技术有限公司,武汉430000 [2]上海发电设备成套设计研究院有限责任公司,上海200240

出　　处：《华电技术》2019年第9期56-58,62,共4页HUADIAN TECHNOLOGY

摘　　要：针对中间仓储式热风送粉贫煤锅炉采用分级燃烧方式时,存在的飞灰含碳量和排烟温度高的问题,提出了一种将三次风进行浓淡分离并重新布置三次风喷口的燃烧器改造方案。改造后,在煤质挥发分下降的情况下,省煤器出口NOx 排放质量浓度从620.75 mg/m^3降至487.00 mg/m^3,飞灰含碳量、炉渣含碳量及排烟温度均下降,达到了低氮改造的预期目标。Unburned combustible in fly ash and high-temperature exhausted gas is prevail in storage-type hot wind pulverized coal feeding system of lean coal boilers taking staged combustion.Tertiary air rich-lean separation and rearranging the tertiary air nozzles was proposed as a retrofit scheme. After retrofitting, when the content of volatile matter decreased,the mass concentration of NOx at the economizer outlet decreased from 620.75 mg/m^3 to 487.00 mg/m^3,and unburned combustible in fly ash and slag decreased as well,and so did the temperature of exhausted gas,which met the expectation of low-nitrogen burner retrofit.

关 键 词：燃烧器 三次风 浓淡分离 中间仓储式热风制粉系统 贫煤锅炉 NOx 质量浓度 

分 类 号：TK229.6[动力工程及工程热物理—动力机械及工程]