燃煤电厂LNB-SNCR-SCR协同脱硝技术及其应用  

Synergetic LNB-SNCR-SCR Denitrification Technology and Application in Coal-fired Power Plants

作　　者：王帅 周保中 葛志伟 

机构地区：[1]华电电力科学研究院

出　　处：《电站系统工程》2017年第3期27-30,共4页Power System Engineering

摘　　要：目前工程应用最广泛的脱硝技术主要包括低氮燃烧器技术(LNB)、选择性非催化还原技术(SNCR)和选择性催化还原技术(SCR)等,但单一的脱硝技术很难满足NO_x超低排放标准。针对我国燃煤电厂煤种复杂和NO_x排放标准日益严格的现状,提出了LNB-SNCR-SCR协同脱硝技术,探讨了该技术的脱硝效率、氨逃逸、安全性和经济性等特点,并总结和分析了该技术工程应用现状、存在问题及解决措施。分析表明,LNB-SNCR-SCR协同脱硝技术非常适合做为新建大型燃煤机组的脱硝工艺,同时在中小型锅炉的脱硝改造中也具有广阔的应用空间,可为燃煤电厂NO_x超低排放工程的改造和设计提供指导作用。Currently the most widely-used denitrification technologies mainly include Low-NOx Burner （LNB）, Selective Non-catalytic Reduction （SNCR） and Selective Catalytic Reduction （SCR） . However, it is hard for such single one to meet the ultra-low emission standards of NOx. Taking the complex types of coal in Chinese coal-fired power plants and increasingly strict emission standards of NOx into consideration, it puts forward the synergetic LNB-SNCR-SCR denitrification technology, and explores denitrification efficiency, ammonia escape, safety and economy of the new technology. In addition, the current application of the new technology and existent problems are summarized and analyzed, followed by the measures to solve these problems. It is shown that the newly put forward technology is suitable to large newly-built coal-fired units, which also has a broad application space in the renovation of small and medium-sized boilers. It can provide guidance and reference for the renovation and design of the project with ultra-low emission of NOx in the coal-fired power plants.

关 键 词：燃煤电厂 脱硝技术 超低排放 氨逃逸 

分 类 号：X701.7[环境科学与工程—环境工程]