袋式除尘器滤袋失效原因分析及预防措施

根据锅炉尾部袋式除尘器滤袋应用的实际案例,针对神东集团寸草塔二矿1台锅炉炉尾袋式除尘器滤袋使用一采暖季后失效,滤料硬化,强度下降的问题,对损坏的滤袋进行了常规性能测试、红外光谱分析、差热分析和电镜扫描,分析了滤袋失效的原因。结果表明:造成寸草塔二矿除尘器滤袋失效的主要原因是氧化。从系统工艺、设备维护的角度考虑,提出了增加锅炉负荷至额定负荷,降低烟气氧含量,采取预涂粉方法避免烟气直接接触滤袋,控制排烟温度等防护措施,对预防出现相似问题,延长滤袋使用寿命有一定的参考意义。 To resolve ageing and losing efficacy problems of PPS filter bag on boiler tail after one heating season in Cuncaota No.2 Coal Mine,Shendong Group,made routine performance test,infrared spectrum analysis,DTA and electron microscope scanning for damaged filter bag.The results show that oxidation is the main reason.Considering the technological process and equipments maintenances,provides a series of measures to lengthen the service life of filter bag,which are increasing the boiler load to rated load,decreasing oxygen content of smoke gas,bepowdering the internal surface of filter bag before operation,controlling the exhaust gas temperature and the like