Abstract: The problems occurred during commission and train run of 300MW CFB unit in Huaibei Linhuan Joinlion Power Generation Corporation Limited were introduced, which included the lower resistance of the air distributor, the easy jam of the bed lances, the damage of expansion joints of induct burner, the fault of the coal feeding system, the problems of adding bed material in coldstate experiment and slag leakage of external heat exchanger, and the jam of peat gun. The following ways were used to solve the abovementioned problems, such as strictly controlling the particle size distribution of coal, ventilating the bed lances with compressed air when they were stopped, cooling the expansion joints of induct burners by water, controlling the moisture content of coal in the lower range, installing tube below the wind chamber of external heat exchangers and manually adding water according to the outlet pressure of the peat guns. By the above means, the problems were solved.

Key words: circulating fluidized bed (CFB), resistance of air distributor, bed lance, expansion joints of in-duct burner, external heat exchanger, peat gun