... 2400mm,2600mm,2800mm,....,4200mm.2.What's the usage of rotary dryer?Rotary drier is widely used for drying materials ... , food, compoud fertilizer, etc. Feeding and discharging unit is installed with thermocouple to control drier temperature. The temperature change ... discharging equipment, dust catcher, etc.4.Rotary dryer working principle:Rotary drier adopts direct flow type of heating with heat ...