联合循环机组余热锅炉SCR脱硝系统氨逃逸率高原因分析及处理  

Analysis and Treatment of High Ammonia Escape Rate in SCR Denitrification System on HRSG of Combined Cycle Unit

作　　者：刘海山 邱振波 LIU Haishan;QIU Zhenbo(Guoneng Guohua(beijing)Gas-Fired Cogeneration Co.,Ltd.,Beijing 100024,China)

机构地区：[1]国能国华(北京)燃气热电有限公司,北京100024

出　　处：《锅炉技术》2023年第6期76-80,共5页Boiler Technology

摘　　要：针对燃气—蒸汽联合循环机组余热锅炉选择性催化还原(SCR)脱硝系统氨逃逸率高的问题,通过对燃气—蒸汽联合循环机组排放的烟气NO_(x)中NO_(2)含量高,且过量NO_(2)的反应速度慢的机理研究,分析了余热锅炉SCR脱硝系统氨逃逸率高的原因及危害;提出了通过燃烧调整、更换新型催化剂、流场优化及精准喷氨等技术措施可有效降低氨逃逸率。In order to solve the problem of high ammonia escape rate in the selective catalytic reducation(SCR)denitrification system of the waste heat boiler of the gas-steam combined cycle unit,the mechanism of high NO_(2) content and slow reaction rate of excessive NO_(2) in the flue gas NO_(x) emitted by the gas steam combined cycle unit was studied.The reasons and hazards of high ammonia escape rate in the waste heat boiler SCR denitrification system were analyzed;Technical measures such as combustion adjustment,replacement of new catalysts,flow field optimization,and precise ammonia injection have been proposed to effectively reduce ammonia escape rate.

关 键 词：燃气—蒸汽联合循环 余热锅炉 SCR 氨逃逸率 高NO_(2)催化剂 受热面腐蚀 

分 类 号：X701[环境科学与工程—环境工程]