... ,straw, rice husk sawdust Drying machine: Product Introduction:Hot-air dryer adopted airflow wink-dry theory, dry intensity is big and ... content is stable, the impurities and pollution is small. This dryer is applicable to starch, rice flour, food, medicine, chemical ... , small floor space, investment and maintenance cost is low.5. This dryer hot air source is from oil burner, gas furnace, coal ...