摘要
以运行24000 h的某热电厂9F级三台燃机脱硝催化剂为研究对象,考察了三台燃机催化剂样品的外观尺寸、理化特性和工艺性能,阐述了催化剂出现的问题及原因,并对催化剂寿命管理提出合理性建议。三台燃机催化剂微观结构发生改变,孔道局部堵塞,比表面积和孔容降低,主要化学成分含量下降,杂质、碱(土)金属含量增加,催化剂存在碱金属和重金属中毒现象。结合脱硝性能曲线和工艺性能检测结果可知,催化剂脱硝效率出现一定程度下降,氨逃逸增大,压降数值稳定,但性能仍满足运行需求。建议定期跟踪催化剂性能,必要时对催化剂进行换装或再生管理,以保障机组安全稳定运行。
This study discusses the problems and countermeasures of catalysts including geometric appearance,chemical properties and process performance in a thermal power plant running for 24000 h to give suggestion on catalyst life management.The results show that the microstructure of the gas-turbine SCR catalysts is changed,and pore channels were blocked,which cause a decrease in specific surface area and pore volume.The content of main chemical components is decreased,while impurities and alkali metals causing catalyst slightly poisoning are increased.The process performance test results showed that the denitrification efficiency decreased and ammonia escape increased,while press drop was stable.Catalyst performnace still meets the requirements of running.It is recommended to monitor the performance of the catalyst closely,and if necessary,replacing or regenerating the catalyst to ensure the operation of the unit safely and steadily is important.
作者
郁苏俊
YU Sujun(Datang Nanjing Environmental Protection Technology Co.,Ltd.,Nanjing 211111,Jiangsu,China)
出处
《工业催化》
2025年第5期88-92,共5页
Industrial Catalysis
关键词
三废处理与综合利用
燃气机组
脱硝
催化剂
性能检测
three waste treatment and comprehensive utilization
gas turbine
denitrification
catalyst
perf-ormance test
