The machine features: SCD desiccant feed composition will be equipped with honeycomb rotor, available low dew point dry air and good stability, shape into a semi-open and fully enclosed two kinds; for hygroscopic materials such as engineering plastics : PA, PC, PBT, PET and the like; and dehumidification, drying, Sec feeding three functions in one, and can choose three segments feeding function; thermal drying drums using lower blower tube design, with cyclone exhaust device to prevent heat loss, ensure that the temperature increase drying efficiency; all machines are with closed loop feeding system that avoids the raw material after drying and again by exposure to ambient air moisture;