Directing against the stall phenomenon occurred on the primary air fan during start-up and shutdown process of the coal pulverizer in Guotou Qinzhou Power Generation Co Ltd

analysis has been carried out in detail

the causes leading to stall of the primany air fan being found

and the resolving scheme being put forward.The cause resulting in said stall of the primany air fan was due to the average flow rate of each primary air fan being smaller than its flow rate during shutdown of one coal pulverizer

hence

it is inevitable to cause stall of one primary air fan.