燃煤电厂SCR催化剂再生和回收利用研究进展  

Research Progress on the Regeneration and Reclamation of SCR Catalysts

作　　者：贺尧祖 李建军[1,2] 李盼宋 张序[1] 陈亮[1] 

机构地区：[1]四川大学建筑与环境学院,四川成都610065 [2]国家烟气脱硫工程技术研究中心,四川成都610065

出　　处：《四川化工》2015年第6期22-24,共3页Sichuan Chemical Industry

摘　　要：选择性催化还原法(SCR)是我国燃煤电厂应用最广、最为成熟的烟气脱硝技术,具有效率高、选择性好、运行稳定等优点,钒系催化剂作为SCR技术的核心部分,在实际运行过程中由于灰尘等有毒物质的毒害作用,存在失活现象,根据预测未来一段时间我国失活SCR催化剂的量将急剧增加,失活SCR催化剂的处置将面临严峻的挑战。本文介绍了燃煤电厂失活SCR催化剂的几种再生方法:水洗再生、热还原再生、SO_2酸化热再生、酸碱液再生;对于不能再生的废SCR催化剂本文也介绍了两种回收利用的方法。Selective catalytic reduction（SCR）for flue gas NO reduction has been widely applied in coal-fired power plant,which has a high NO reduction efficiency,a better selectivity and a stable operation.Vanadium-based catalyst is the core of SCR technology.The catalyst exists serious inactivation because the toxicity of dust and SO2 in actual operation.It is predicted that the deactivated catalyst faced disposal problems in the years ahead with the gradual increasing of deactivated catalyst.The paper introduced the regeneration methods of deactivated SCR catalyst including water washing,thermal reduction regeneration,thermal regeneration by SO2 and acid treatment.For the catalysts difficult to be regenerated,two recycle ways are also introduced in this paper.

关 键 词：SCR催化剂 失活 再生 金属氧化物回收 

分 类 号：X773[环境科学与工程—环境工程]