The natural exhaust system in screw type dryer often resulted in higher and fluctuated moisture content in dried scraps,therefore it was replaced by a mechanical exhaust system.

• 螺旋式碎片干燥设备的排潮系统由于设计不合理,经常造成干燥后碎片含水率偏高且不稳定,为此对其排潮系统进行了改进。