Three Cylinder Dryer

Introduction：Three cylinder dryer， with its core principle of “multi-stage heat exchange + self-insulation,” utilises three drum layers to synergistically halve energy consumption and double thermal efficiency. Its compact structure and high adaptability make it a key piece of equipment for improving resource utilization in the building materials, mining, and environmental protection sectors. The three-drum dryer consists of nested cylinders (inner, middle, and outer), a drive system (friction-driven by rollers), a hot air furnace (coal/gas/oil), and a dust removal unit. Curved spiral lifters and guide plates are installed within the drums, allowing the material to move in an S-shaped path through the three drums.
Working principle：1. Feeding and Initial Drying: Wet material enters the inner drum from the feed end, where it is dispersed by the spiral guide plates and then scattered by the lifters. Direct contact with the downstream hot air evaporates the moisture. 2. Countercurrent Heat Exchange in the Middle Drum: The material falls into the middle drum and moves in the opposite direction, absorbing the heat emitted by the inner drum and the hot air flow from the middle drum, extending the drying time and improving uniformity. 3. Insulated Dehydration in the Outer Drum: The material enters the outer drum and moves leftward, indirectly drying it using low-temperature waste heat. The drum itself insulates the material to minimize heat loss. 4. Discharge and Dust Removal: After drying, the material is discharged from the outer drum outlet. The exhaust gas is removed through a cyclone and bag filter, achieving a dust recovery rate of over 95%.