BBD-4360型磨煤机直吹式制粉系统爆炸原因分析

Cause Analysis on Explosion of Direct Firing Pulverizing System for a BBD-4360 Coal Mill

针对电厂制粉系统频繁发生的爆炸事故,分析了锅炉煤粉系统发生爆炸的因素。得出结论是:爆炸是由煤质挥发分过高、设备中金属件发生摩擦引发明火和积煤自燃造成的。提出了调整运行参数、对设备进行改造等措施,从而避免了制粉系统的爆炸事故。

Aiming at the explosion accident frequently occurring in pulverizing systems of power plants, by analyzing the explosion causes, the failure is found to be caused by over-high volatile content of coal, open fire resulted from friction among metal parts in the equipment, and spontaneous combustion of piled coal. Corresponding measures are proposed, such as adjusting operating parameters and retrofitting relevant equipment, so as to avoid the recurrence of explosion accident in the pulverizing system.