Abstract: For the Mill tripped because of instability of a Boiler’s combustion,This paper analyzed the parameter of the coal mill at start-up time,and the changein theactualproductionofcoal quality, studyed the organization of burning ability of swirling burner,and found the maincausesofinstability of Boiler’s combustion.We have solvedthe problemat their source about instability of the Boiler’s combustion by taking measures,which has a certain reference value for similar users of the combustion system andthe coal pulverizing system.

Key words: boiler, coal mill, burner, trip