双层SCR脱硝催化剂在低热值燃气轮机组的应用  

Applications of Double-layer Selective Catalytic Reduction(SCR)Denitration Catalyst in Compressor-turbine Unit with Low Heating Values

作　　者：孟晓敏 李平[1] 武建国[1] 张俊峰[1] 连伟 Meng Xiao-min;Li Ping;Wu Jian-guo;Zhang Jun-feng;Lian Wei(Power Supply General Plant of Inner Mongolia Baotou Steel Union Co.,Ltd.,Baotou 014010,Inner Mongolia Autonomous Region,China)

机构地区：[1]内蒙古包钢钢联股份有限公司动供总厂,内蒙古包头014010

出　　处：《包钢科技》2023年第2期69-72,共4页Science & Technology of Baotou Steel

摘　　要：某钢铁企业4台使用高炉煤气、焦炉煤气的低热值燃气轮机组烟气氮氧化物排放最高浓度约为250 mg/m^(3),不满足钢铁行业超低排放限值要求,需要进行脱硝改造。在研究国内外常用的烟气脱硝技术基础上,提出了3种不同的脱硝改造方案。通过对比技术成熟度、使用风险、运行经济性等因素最终实施了余热锅炉内置双层SCR催化剂的改造方案并达到预期效果。本研究可为我国未预留脱硝空间且氮氧化物较高的低热值燃气轮机组提供现场可行且有效的技术方法。The maximum concentration of nitrogen oxide emissions in the flue gas of four compressor-turbine units with low heating values using blast furnace and coke oven gas in a steel enterprise is about 250 mg/m^(3),which could not meet the requirements of limiting values for ultra-low emissions of the steel industry,so the denitration modification is needed.Three different denitration modification schemes are proposed based on studying frequently-used flue gas denitration technologies at home and abroad.The modification scheme of built-in double-layer SCR catalyst in waste heat boiler is finally implemented by comparing such factors as the technology maturity,use risks and operating economy as well as the expected effects are achieved.This study could provide the feasible and effective technical methods for the compressor-turbine unit with low heating values and more nitrogen oxides while without prepared denitration space on site in our country.

关 键 词：燃气轮机组 余热锅炉 脱硝 超低排放 

分 类 号：X773[环境科学与工程—环境工程]