摘要
新建、在役火力发电厂均设计或新增有脱硝系统,旨在降低NOX排放浓度,满足环保要求。脱硝系统主要有SCR、SNCR、SCR+SNCR等技术方法,在实际生产过程,其运行效率往往达不到设计值,随着燃煤电厂超低排放标准的执行,各发电企业纷纷对已有的脱硝系统实施优化改造。文中基于某660 MW机组采用SCR技术脱硝效率仅有88%,实施精准分区喷氨改造,阐述了具体改造方案、调试方法、调试中出现的问题,采取有效措施后,脱硝效率达到了94.2%,氨逃逸率小于2.28%,不仅满足了当前环保要求,氨逃逸率的下降还降低了空气预热器堵塞的问题。
New and in-service power plants are designed or have new denitrification systems designed to reduce NOX emission concentration and meet environmental requirements.The denitrification system mainly has SCR,SNCR,SCR+SNCR and other technical methods,in the actual production process,its operation efficiency often does not reach the design value,with the implementation of ultra-low emission standards in coal-fired power plants,power generation enterprises have to optimize the existing denitrification system.Based on the SCR technology of a660 MW unit,the efficiency of denitrification is only 88%,and the concrete plan,debugging method and problems in debugging are expounded.After taking effective measures,the denitrification efficiency has reached 94.2%,and the ammonia escape rate is less than 2.28%,which not only meets the current environmental protection requirements,but also reduces the problem of air preheater blockage.
作者
谭再奎
TAN Zai-kui(Chongqing Songzao Power Co.,Ltd.,Chongqing 401443,China)
出处
《应用能源技术》
2020年第3期31-34,共4页
Applied Energy Technology
关键词
660
MW机组
精准喷氨
脱硝系统
氨逃逸
SCR
660 MW unit
accurate ammonia injection
denitrification system
ammonia escape
SCR
