NO_(2)-NO转换炉垢物形成分析及预防措施  

Analysis and Preventive Measures of Scale Formation in NO_(2)-NO Converter

作　　者：周志兴[1] 荣利萍 Zhou Zhi-xing;Rong Li-ping

机构地区：[1]江苏方天电力技术有限公司,江苏南京210000 [2]中兴通讯股份有限公司,江苏南京210000

出　　处：《电力系统装备》2021年第20期122-123,共2页Electric Power System Equipment

摘　　要：随着燃煤机组超低改造的推进,以及各发电集团污染物排放政策的收紧,大部分电厂环保设施长期处于满负荷状态下运行,过量的NH_(3)逃逸与氯化物随着采样烟气进入到NO_(2)-NO转换炉内,在350℃高温下,经过复杂的热分解、化合反应生成氯化铵,当烟气流出转换炉,温度骤降,氯化铵遇冷结晶,附着在气管壁上,逐渐累积,最终影响整套烟气排放连续监测系统(CEMS)的稳定运行。针对环保工艺、污染物监测装置的各个环节提出了改进措施,避免了氯化铵在分析系统内发生结晶。With the promotion of ultra-low transformation of coal-fired units and the tightening of pollutant emission policies of power generation groups,most environmental protection facilities of power plants operate at full load for a long time.Excessive NH_(3) escape and chloride enter the NO_(2)-NO conversion furnace with the sampled flue gas,and ammonium chloride is generated through complex thermal decomposition and chemical reaction at 350℃,When the flue gas flows out of the converter,the temperature drops suddenly,ammonium chloride crystallizes when it is cold,adheres to the gas pipe wall and accumulates gradually,which finally affects the stable operation of the whole CEMS system.This paper puts forward improvement measures for each link of environmental protection process and pollutant monitoring device to avoid crystallization of ammonium chloride in the analysis system.

关 键 词：燃煤电厂 NO_(2)-NO转换器 氯化铵晶体 氨逃逸 

分 类 号：X831[环境科学与工程—环境工程]