... .Material can be powder, sawdust ,straw, rice husk Airflow wood dryer: The whole system consists of fan blower, motor engine, fuel ... air lock. In this system, wet material is input into hopper by screw feeder. Fuel furnace produces large volume of hot ... /h15kw3080kgunder 50% 2012 hot selling 500kg/hour Airflow wood sawdust dryer