生物质锅炉脱硝技术及工程应用  

Denitrification technology of biomass boilers and its engineering application

作　　者：周建强[1] 高攀[1] 董长青[1] 杨勇平[1] ZHOU Jianqiang;GAO Pan;DONG Changqing;YANG Yongping(National Engineering Laboratory for Biomass Power Generation Equipment,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学生物质发电成套设备国家工程实验室,北京102206

出　　处：《热力发电》2018年第10期1-5,共5页Thermal Power Generation

基　　金：国家重点基础研究发展计划(973计划)项目(2015CB251501);中央高校基本科研业务费专项资金项目(2018ZD08;2018MS033)~~

摘　　要：生物质是未来不可或缺的可再生能源,但由于其氮元素含量相对较高,在燃烧过程中会生成大量的氮氧化物,造成环境污染。通过分析生物质氮氧化物产生的机理和工程实践发现:生物质在锅炉燃烧时,其氮氧化物的生成及脱除过程受燃料类型、燃烧温度、过量空气系数影响较大;选择性非催化还原法是适合生物质锅炉的一种脱硝的技术,还原剂的类型、喷射点及喷射方式是影响脱硝效率的关键;控制好脱硝技术的关键点,选择性非催化还原法在生物质锅炉脱硝中就可以获得较高的效率,但要达到稳定的脱硝效率,还需要锅炉具备良好的运行控制。Biomass is an indispensable renewable energy in the future.However,due to relatively high nitrogen content in biomass,a large amount of nitrogen oxides are generated during the combustion process,which cause the environmental pollution.Through analysis on the mechanism of NOx formation and engineering practice,it is found that,during biomass combustion in boilers,the formation and removal process of NOx is greatly influenced by fuel type,combustion temperature and excess air coefficient.The non-catalytic reduction technology is a kind of denitrification technology suitable for biomass boiler,and the type of reducing agent,injection point and injection mode are the key factors affecting denitrification efficiency.By controlling the key point of the denitrification technology,the non-catalytic reduction method can achieve higher efficiency during the denitrification process in biomass boilers.However,to achieve a stable denitrification efficiency,it is necessary to have a good operational control of the boiler.

关 键 词：生物质锅炉 氮氧化物 生成机理 脱硝技术 选择性非催化还原 脱硝效率 工程应用 

分 类 号：TK6[动力工程及工程热物理—生物能] X511[环境科学与工程—环境工程]