According to different coal types, the temperature for feeding coal varies. When the coal for burning has high volatile, the temperature can be reduced, generally around 480 ℃; When burning the lean coal , generally the temperature is  around 550 ℃; When burning the anthracite, generally the temperature is around 600℃; After the bed temperature reaches the above conditions, turn on one coal feeder in the  middle with 10% of the coal feeding capacity (pulse feeding) for 90 seconds, and the stop it for 90 seconds to observe whether the oxygen is declining or not, and the bed temperature is rising or not. After doing it like above mentioned for 3 ~ 5 times, if the oxygen declines, and bed temperature rises, the coal can be fed continuously to guarantee the bed temperature to rise steadily.(lsh)