... convenient transportation and so on.2. Rotary Drum Dryer main parts: cylinder, lifters, driving device, supporting device and sealing ring, feeding device, discharging device, gear ... natural gas, LPG gas, wood, and etc.4. Rotary Dryer Drum Drier Mode of flow: direct flow or counter flow. ... based on the different materials.5.Rotary Dryer Drum Drier principle of operation:The raw material plate which is ...