W火焰锅炉多次引射分级燃烧机理及技术研究  

Multi-injection multi-staging combustion mechanistic studies and down-fired boiler technology

作　　者：李争起 张鑫 陈智超 曾令艳 谭紫莹 朱群益 秦裕琨 LI ZhengQi;ZHANG Xin;CHEN ZhiChao;ZENG LingYan;TAN ZiYing;ZHU QunYi;QIN YuKun(National Engineering Laboratory for Reducing Emissions from Coal Combustion,School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]哈尔滨工业大学能源科学与工程学院,燃煤污染物减排国家工程实验室,哈尔滨150001

出　　处：《中国科学：技术科学》2020年第7期849-862,共14页Scientia Sinica(Technologica)

基　　金：国家高技术研究发展计划(编号:2006AA05Z321);国家重点研发计划(编号:2016YFC0203702);国家自然科学基金(批准号:51576055);黑龙江省头雁行动计划资助项目。

摘　　要：引进国外技术制造的W火焰锅炉实际运行中普遍存在飞灰可燃物含量高、NO_x排放量高及结渣严重等问题.我们对不同技术流派W火焰锅炉的炉内流动、燃烧及NO_x生成特性,开展了气固两相、数值模拟及工业试验研究,在消化吸收国外技术的同时,找出了问题的原因.提出了W火焰锅炉多次引射分级燃烧技术,该技术已被用于4台600-MW和350-MW机组新炉设计,5台600-MW和300-MW机组锅炉燃烧系统改造,解决了国外W火焰煤粉燃烧技术存在的问题,实现了锅炉的经济、安全运行.Actual operating results have revealed that imported down-fired boilers that use foreign technologies suffer from various problems,such as high carbon content in the fly ash, high NO_x emissions, and heavy slagging. Gas/solid two-phase experiments, numerical simulations, and industrial measurements were carried out to investigate the flow, combustion, and NO_x formation characteristics in a furnace of a down-fired boiler using different foreign technologies. The cause of these problems was found, and the foreign technologies were examined. Multi-injection multi-staging combustion technology for the down-fired boiler is proposed. This technology had been used in the design of four 600-MW and 350-MW new down-fired boilers and in the combustion system transformation of five 600-MW and 300-MW down-fired boilers. The problems originating from foreign down-fired pulverized coal combustion technologies have been solved, and economic and safe operation of a down-fired boiler has been realized.

关 键 词：W火焰锅炉 多次引射分级 燃烧 NOX排放 飞灰可燃物含量 

分 类 号：TM621.2[电气工程—电力系统及自动化] X773[环境科学与工程—环境工程]