JP2945603B

PURPOSE: To suppress the deposition of a material to be dried in a rotary drum and to automatically charge or discharge the material by forming a stationary protrusion in the drum and using one side of the protrusion as a scooping recessed part and the other side as the material crushing blade. CONSTITUTION: The door of a charging and discharging port 6 is opened, and a movable conveyor 15 is inserted along a conveyor rail 14 fitted to a fixed end plate 13. A material to be dried is uniformly charged into a rotary drum 2, and a rotating power is transmitted to the drum 2 from a motor 12 through the rotating shaft 11 and roller 8. Meanwhile, dry air is supplied into the drum 2 from an air inlet and discharged from an air outlet to dry the material. At this time, the crushing blade face 17b of the protrusion 17 fixed to the drum 2 is rotated and directed forward in the rotating direction, and the material is brought into contact with the blade 17b and crushed. Further, the drum 2 is rotated backward to direct the scooping recessed part 17a of the protrusion 17 forward in the rotating direction, and the material is dropped on the conveyor 15 from the recessed part 17a and discharged.