水泥厂烟气超低温NH_(3)-SCR脱硝工艺中试  

Pilot test of ultra-low temperature NH_(3)-SCR denitrification process for cement plant flue gas

作　　者：任景行 刘程 李炳宏 王治宙 REN Jinghang;LIU Cheng;LI Binghong;WANG Zhizhou(CCTEG Xi’an Research Institute(Group)Co.,Ltd.,Xi’an 710054,Shaanxi,China)

机构地区：[1]中煤科工西安研究院(集团)有限公司,陕西西安710054

出　　处：《工业催化》2024年第11期87-96,共10页Industrial Catalysis

基　　金：国家自然科学基金项目(22008264)。

摘　　要：SCR(选择性催化还原)为目前主流的氮氧化物(NO_(x))去除技术,商用催化剂的运行温度较高,一般为(250~350)℃,在烟气温度较低的场合很难应用。我们开发了一种改性整体式V系脱硝催化剂,该催化剂在低温下表现出优异的脱硝性能。研究改性V系NH_(3)-SCR脱硝催化剂的低温活性,并成功在实际烟气条件(120~160)℃下进行了应用,中试稳定运行时间超过10个月,出口NO_(x)浓度始终可以达标排放,并对运行后催化剂的性能进行了分析探究。中试试验验证了技术路线的可行性和催化剂可靠性,并完成工业化方案论证工作,具有开展示范工程的条件。SCR(Selective Catalytic Reduction)is currently the mainstream nitrogen oxide(NO_(x))removal technology.Commercial catalysts operate at high temperatures,typically between(250-350)℃,making them difficult to apply in low flue gas temperatures.We have modified a monolithic V-series denitrification catalyst,which exhibits excellent denitrification performance at low temperatures.This article studied the low-temperature activity of the modified V-series NH_(3)-SCR denitrification catalyst and successfully applied it under actual flue gas conditions of(120-160)℃.The stable operation time of the pilot test exceeded 10 months,and the outlet NO_(x)concentration could always meet the emission standards.The performance of the catalyst after operation was analyzed and explored.The pilot test verified the feasibility of the technical route and the reliability of the catalyst,and completed the demonstration work of the industrial plan,which has the conditions to carry out demonstration projects.

关 键 词：大气污染防治工程 低温烟气 选择性催化还原 失活 蜂窝催化剂 再生 

分 类 号：TQ172.9[化学工程—水泥工业] X781.5[化学工程—硅酸盐工业]