宽温脱硝催化剂低负荷特性研究  

Study on low load characteristics of wide temperature denitration catalyst

作　　者：宋玉宝[1] 姚燕[1] 何川[1] 王乐乐[1] 梁俊杰[1] 朱德力[1] SONG Yubao;YAO Yan;HE Chuan;WANG Lele;LIANG Junjie;ZHU Deli(Xi’an Thermal Power Research Institute Co.,Ltd.,Suzhou Branch,Suzhou 215153,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

出　　处：《热力发电》2023年第10期170-175,共6页Thermal Power Generation

基　　金：苏州市重点产业技术创新项目(SGC2021121)。

摘　　要：燃煤机组低负荷运行时,遇到SCR脱硝催化剂硫酸氢铵(ABS)失活问题,对此现象进行了试验研究。结果显示:1)烟气温度低于ABS凝聚温度时,ABS在催化剂微孔内逐渐积聚造成堵塞而失活,而ABS凝聚温度与微孔孔径成反比,与烟气中NH_(3)和SO_(3)体积分数的乘积正相关;2)与常规催化剂一样,孔径2~20 nm的微孔仍然是宽温脱硝催化剂的结构主体,改变不了其在低负荷下ABS失活的现象;3)基于催化剂ABS失活的物理可逆特性,防治结合仍旧是解决ABS问题的根本方法。During the low load operation of coal-fired units,the SCR denitration catalyst may be deactivated by ammonium bisulfate(ABS).The experimental tests are carried out on this phenomenon and the results show that:1)with the flue gas temperature below the ABS condensation temperature,the catalyst will be deactivated due to the gradual deposition of ABS in the micropores.The ABS condensation temperature is inversely proportional to the micropore diameter,and the ABS concentration is positively related to the product of NH_(3) and SO_(3) concentrations in the flue gas;2)the micropores with pore diameters of 2~20 nm are still the main structure of wide temperature denitration catalyst as well as the conventional catalysts,which cannot change its fate of ABS deactivation under low load;3)the physical reversibility of catalyst ABS deactivation makes“combination of prevention and treatment”still the fundamental method to solve the ABS problem.

关 键 词：燃煤机组 宽温脱硝催化剂 硫酸氢铵 凝聚温度 失活与恢复 

分 类 号：X701[环境科学与工程—环境工程]