Proper replacement of filter cloth for sealing air fan and replacement of oil filter elements when needed will result in long and trouble free operation It is especially important to keep coal mills up and running. Fortunately, the ATOX® coal mill is extremely simple both to operate and maintain.
air/oxygen from the atmosphere or FD fan discharge and force it through the coal pulverizers, picking up the coal powder and directing it into the boiler for burning. There is usually one or two PA fans in a coal fired power station.
What is seal air fan for coal mills - The Q&A wiki. Seal air fan is for avoiding foreign material entry in to the roller - by damaging the seals. The seal air fan flow is passing between the seal air …
Seal Air Fan basically functions as booster fan taking suction from primary air fan discharge (cold primary air before AH-A&B) boosting up the air pressure and supplying seal air to various sealing points of Bowl Mills.
Seal air fan takes suction from primary air fan & Scanner air fan takes suction from FD Fan During the starting of the boiler if we are doing coal firing means pulveriser wont be required so primary air fan won't be required. but to support combustion FD Fan should be needed.