FG series dryer works by drying the wet material is divided into two steps. Start with two dry ingredients and add hot exhaust gas mixture to a pressure drying, use low-temperature and humidity after the exhaust from the plane, the semi-hot fresh air from the secondary vacuum drying, drying of the product measured packaging, used as a drying gas temperature low humidity, thus completing the cycle of good drying process, add the hot air volume can be adjusted according to need, so the machine wide applicability.