The tumble dryer is also called tumble dryer, which is a dryer equipment for handling a large number of materials. The rotary drum dryer is widely used in metallurgy, building materials, food, light industry, chemical industry, coal, medicine and mining industries due to its reliable operation, high operating flexibility, strong adaptability and large processing capacity. Rotary dryer equipment is generally applicable to granular materials, and can also be used to dry sticky paste materials or materials with high water content by partially mixing materials. The advantages of rotary dryer are large production capacity, wide application range, small flow resistance, large allowable fluctuation range in operation, convenient operation, etc. It is commonly used for drying sand, mineral powder, dry mud, chicken manure, cow manure, etc.