调节引风机，使上箱体中床层物料上部保持微负压，维持良好的干燥环境并防止粉尘外泄（略）。
Fan regulation, which box on the bed material to maintain the upper-vacuum, maintain good dry environment and prevent dust leakage.
其作用是捕集烟气中的液滴及少量的粉尘，减少烟气带水，防止风机振动。
Its function is to collect the liquid drop in gas and a tiny amount of dust, to reduce the efficiency of water - adsorption of gas and to prevent the fan from vibrating.
附加小型吹风机、粉尘分离装置，直接回收，不经人手。
Attaching the min blower, dust separation plant, recycle directly, no need the operator.
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