In the series of wet material drying equipment products, the rotary triple drum dryer is an efficient and energy-saving product improved on the basis of the single drum rotary dryer. Through the application of multiple enterprises and industries, good results have been achieved. The rotary three return dryer has improved the internal structure of the original single simple dryer by adding pre drying of wet materials before entering the machine and extending the drying time of wet materials inside the machine. In addition, sealing, moisture retention, and reasonable supporting measures have been taken to increase the production capacity of the dryer by 50-80% compared to the original single simple dryer, achieving a unit volume evaporation intensity of 120-180kg/m³ and a standard coal consumption of only 6-8kg/t. It has advanced technology, reasonable operating parameters, and simple and feasible operation. It can be widely used in various industries such as river sand, slag, clay, fly ash, coal, iron powder, mineral powder and other mixed materials, dry mixed mortar in the construction industry, yellow sand, as well as raw material drying in chemical, casting and other industries.