锅炉末级过热器氧化皮堵塞爆管规律性偏差分析及处理  

Regular deviation analysis and treatment of tube explosions caused by oxide scale clogging at final superheater of boilers

作　　者：陈永生 

机构地区：[1]福建华电电力工程有限公司,福州350003

出　　处：《华电技术》2018年第6期23-25,共3页HUADIAN TECHNOLOGY

摘　　要：某电厂#2锅炉投产运行一段时间后连续多次出现末级过热器氧化皮堵塞爆管,对爆管部位进行分析,发现存在规律性偏差,通过调研,指出出现偏差的主要原因是保温浇注料结构不当导致烟气流场发生变化,进而引发中部积灰形成烟气走廊。通过改造保温浇注料结构,解决了中部积灰和烟气走廊问题,消除了爆管隐患。After the operation of the#2 boiler in a power plant,tube explosion caused by oxide scale clogging at final superheater has occurred many times. The explosion part of tube is analyzed and found to have regular deviation. Through investigation,the main reason for the deviation is improper pouring of thermal insulation castable material. It will lead to a change in the smoke flow field and the formation of flue gas corridor caused by central ash. By modifying the structure of the thermal insulation castable,the problem of ash accumulation and flue gas corridor in the central part is solved,and the hidden danger of the explosion tube can be eliminated.

关 键 词：锅炉 末级过热器 氧化皮 堵塞 爆管 偏差 烟气走廊 

分 类 号：TK223.2[动力工程及工程热物理—动力机械及工程]