双进双出磨煤机正压直吹式制粉系统异常分析

Analysis of abnormal condition of BBD mill pressure direct-fired system

黔东电厂600MW锅炉机组在调试期间,双进双出磨煤机正压直吹式制粉系统不同程度地出现了原煤仓空仓,给煤机断煤,给煤机上下闸板卡涩、不灵活,给煤机及给煤机清扫电机频繁故障等问题,甚至出现了给煤机内超温和烧损导致制粉系统异常的情况。为此,分析了制粉系统各种异常现象的原因、特点和危害,提出并采取了相应的技术措施,确保了锅炉机组安全经济运行。

In the commission period of 600 MW boiler unit in Qiandong Power Plant, some abnormal phenomena in BBD mill pressure direct-fired system were occurred in varying degrees which are as follow： the raw coal bin became empty, coal feeder discontinued, top and lower shutters became jammed and not flexible, coal feeder and coal feeder cleaning motor went wrong frequently, etc. , even the over temperature and burning damage in coal feeder were occurred. The reason, feature and hazard of these abnormal phenomena in milling system were analyzed, and relevant technical measures were proposed and then adopted, so the safe and economical operation of boiler unit was assured.