在近几年投运的许多中小型锅炉机组中,我们常常发现煤粉混合器有下粉不匀,间断下粉的现象,导致锅炉燃烧不稳,炉膛负压波动,给锅炉燃烧的自动调节投入造成很大困难。在煤种变化很大的情况下,要维持机组的安全、稳定、经济地运行,必须调整一次风,而一次风速的变化必然引起混合器落粉管静压的变化。当这个压力为正的时侯,可将给粉机均 In many small and medium-sized boiler units put into operation in recent years, we often find that pulverized coal mixers have the phenomenon of uneven powder, intermittent powdering, resulting in unstable combustion of the boiler, fluctuation of the furnace negative pressure, and automatic adjustment of the boiler combustion Investment caused great difficulties. In the case of coal variety changes, to maintain the unit safe, stable and economical operation, we must adjust the primary air, and the change of the wind speed inevitably causes the mixer drop tube static pressure change. When this pressure is positive, you can give the powder machine