SCR催化剂低负荷运行硫酸氢铵失活研究  

Study on the Ammonium Bisulfate Deactivated SCR Catalyst at Low Load Operation

作　　者：宋玉宝[1] 刘鑫辉 何川[1] 王兴俊 王乐乐[1] 程世军 马云龙 梁俊杰[1] SONG Yubao;LIU Xinhui;HE Chuan;WANG Xingjun;WANG Lele;CHENG Shijun;MA Yunlong;LIANG Junjie(Xi'an Thermal Power Research Institute Co.,Ltd.,Suzhou Branch,Suzhou 215153,China;Huaneng Qinbei Power Plant Co.,Ltd.,Jiyuan 459012,China)

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]华能沁北电厂有限责任公司,河南济源459012

出　　处：《中国电力》2019年第1期144-150,共7页Electric Power

基　　金：华能集团总部科技项目(HNKJ16-H04)~~

摘　　要：针对国内燃煤机组低负荷运行SCR脱硝系统出现的催化剂因硫酸氢铵(ABS)失活问题,在实验室模拟烟气条件下,对催化剂ABS失活及活性恢复特性进行了研究。结果表明,毛细凝聚作用下的ABS液化-汽化是典型的物理可逆过程,且受到烟气中NH_3与SO_3体积分数的正相关影响。基于这一研究成果,提出了最低连续喷氨温度(MOT)的经验计算公式,该公式可用于评估实际运行烟气条件下的MOT。为指导SCR低负荷运行最佳方案的选择和ABS失活催化剂的活性恢复,在对SCR低负荷运行案例分析基础上,给出了MOT经验计算公式使用原则和方法。Aimed at the problem of ammonium bisulfate(ABS)deactivated SCR catalyst at low load operation,the characteristics of ABS deactivation and activity recovery are studied in the simulated flue gas environment in laboratory.It indicates that the ABS liquidation-vaporization under capillary condensation is a typical invertible process and the process is positively affected by the concentration of NH3 and SO3 in flue gas.In addition,the empirical formula used to evaluate the MOT under the actual operating condition is proposed.Based on the case analysis of the SCR operating at low load,the principle and method to use the experience formula MOT is given to guide the selection of the best plan for SCR operating at low load and the activity recovery of the ABS deactivated catalyst.

关 键 词：燃煤机组 SCR催化剂 低负荷运行 最低连续喷氨运行温度(MOT) 硫酸氢铵(ABS) 毛细凝聚 失活 活性恢复 

分 类 号：TM621.9[电气工程—电力系统及自动化] X701[环境科学与工程—环境工程]