SCR脱硝装置对锅炉系统与环境的影响及防治措施  

Prevention Measures and Influence Analysis on SCR De-NO_x System to Coal-fired Power Plant Boiler Equipments and Environment

作　　者：方朝君[1] 金理鹏[1] 余美玲[2] 郭常青[3] 

机构地区：[1]西安热工研究院有限公司苏州分公司,江苏苏州215153 [2]苏州热工研究院有限公司,江苏苏州215004 [3]中国科学院广州能源研究所,广东广州510640

出　　处：《锅炉技术》2015年第5期10-14,19,共6页Boiler Technology

基　　金：广州市科技计划项目(2012J4300142)

摘　　要：燃煤电厂SCR脱硝装置引入了还原剂和脱硝催化剂,对锅炉系统运行和环境安全造成了一定的负面影响。结合运行实例分析了因SCR脱硝装置的投运造成锅炉烟气系统阻力增加,导致引风机能耗上升、空气预热器冷端硫酸氢铵(NH_4HSO_4)堵塞等新问题,对此提出了有效易行的应对措施。通过计算结果表明:投运SCR脱硝装置的环境影响负荷显著低于未经脱硝直接排入大气的环境影响负荷,但是应控制脱硝出口氨逃逸浓度在低水平,同时对脱硝催化剂进行寿命管理。给出了通过再生技术与回收有价元素,综合处置废弃催化剂以防止二次污染的解决思路。The influences of denitration which stemmed from the application of reductants and catalysts SCR equipment system. were discussed respectively, It is the events that caused the boiler and environmental problems mainly including flue gas resistance increasing, induced draft energy consumption rising, jam of ammonium bisulfate （ABS） and ash deposit in air preheater, etc. were analyzed because of the installation of SCR equipment. Related reducing negative impacts of SCR equipment have been put forward. It points out that the environmental impact of SCR equipment was significantly lower than without it directly discharged into the atmosphere instead. Then it presents prevention keystone of the possible negative effects is to keep ammonia escapes low from SCR equipment and propermanages the spent catalyst. Regeneration and recovery of valuable elements from utilization catalyst were comprehensive disposal methods.

关 键 词：烟气脱硝 SCR催化剂 氨逃逸 空气预热器 

分 类 号：X701.3[环境科学与工程—环境工程]