sand dryer rotary drum

Three-drum Dryer Introduction

The three-drum dryer,three-drum drying machine, three-cylinder dryer is contact internal heating conduct dewatering unit like double-drum dryer, is mainly composed of inner cylinder, outer cylinder, roller, tire support device, gear, discharge port, outlet and sealing devices.

Three-drum Dryer Features

Three-drum dryer or double-drum dryer has compact structure and covers a small area which is half of the single drum dryer does. Three-drum dryer works reliably with low energy consumption and high heat efficiency which realizes good material drying effect, simple automation control and few operating staff.

Three-drum Dryer Working Principle

Materials enter the inner side of the drum through the feeding device to realize current flow drying process. They get raised and scattered under the shoveling plate in a spiral advancing way to exchange heat. Then the materials enter the middle layer of the inner wall through the other end to realize counter current drying process. They are lifted in over and over in the middle layer which advance in two-steps forward and one-step back way. They absorb heat from both inner drum and middle drum, which extend the drying time and realize the best drying condition. Finally, materials fall into the external layer of the drum from the other end of the middle layer, processing in a rectangle multi-loop way. The dried materials move quickly out of the drum under the hot air, while the wet ones remain because of their own weight. Materials are dried completely inside the rectangle shoveling plate and then cooled by the single drum cooler, thus finishing the whole drying process.