At the high load condition, change the rotating speed of steam or electricity feed water pumps to ensure the water level of the drum.
高负荷时通过改变给水泵转速改变给水量，用三冲量系统控制汽包水位。
The main factors which had influence on drying rate were found: the operating air velocity, the speed of rotating drum, the temperature of air flow, the shapes and characteristics of materials.
找出影响干燥速率的因素有：操作气速，转鼓转速，热风温度，物料形状，物料特性等。
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