Abstract: Huadian Qingdao Power Generation Corporation Limited adopts BBD4060C type double-inlet & double-outlet coal mill, Because of the decrease of coal quality and the increase of sundry things in coal, the separator deflector baffles were blocked up frequently to lead to the negative influence on safety and stability of system running. To solve this problem, the number of deflect baffles was reduced to half, and length was doubled. After the reforming no blockage occurred again.

Key words: double-inlet &, double-outlet coal mill, separator properties analysis, reform of separator