CFB锅炉SNCR脱硝技术常见问题及对策  

Common problems and countermeasures of CFB boiler SNCR denitrification technology

作　　者：赵鹏勃[1] 孙涛 高洪培[1] 余武高 安城 刘冬[1] 惠小龙[1] 

机构地区：[1]中国华能集团清洁能源技术研究院有限公司,北京102209 [2]中电投江西电力有限公司分宜发电厂,江西分宜336600

出　　处：《洁净煤技术》2016年第1期86-89,104,共5页Clean Coal Technology

摘　　要：为降低火电燃煤机组烟气NO_x排放,介绍了循环流化床(Circulating Fluidized bed,简称CFB)锅炉选择性非催化还原法(Selective Non-Catalytic Reduction,简称SNCR)脱硝系统原理和方法,对该技术在CFB锅炉应用中存在的问题进行归纳,为该技术的推广应用提供支持。以国产330 MW CFB锅炉的SNCR脱硝法为例,分析了该脱硝法的工艺特点,对工程应用中出现的脱硝效率偏低、氨水耗量大、氨逃逸浓度高等问题进行分析,提出改变喷枪布置位置、锅炉低氮燃烧优化、喷枪雾化效果优化等对策。工程应用表明,CFB锅炉SNCR脱硝技术成熟,脱硝效率完全满足环保要求。In order to reduce NO-）xemission of coal-fired power plant,the principle of SNCR was introduced. The common problems of the technology in CFB boiler were summarizedb. Taking a homegrown 330 MW CFB boiler SNCR denitration method as research object,the characteristics of denitration process were analyzed. The denitration efficiency was low,the ammonia consumption and escaping ammonia were large. The problems were resolved by changing spray gun position,optimizing low nitrogen combustion and pulverization.

关 键 词：煤炭燃烧 CFB锅炉 SNCR脱硝 低氮燃烧 

分 类 号：X773[环境科学与工程—环境工程]