Rotary Dryers represent the oldest continuous and undoubtedly the most common high volume dryer in industry and it has evolved more adaptations of the technology than any other dryer classification.
With the rotary movement of the Dryer, solids are picked up by the specially designed flights to a certain distance around the drum and showered through the air in a cascading curtain. Most of the drying occurs at this time, as the solid are in close contact with the hot air. Flight action is also partly responsible for the movement of solids through the drum.
Advantages of Rotary Dryers:
- Reduced crystal damage and dust formation due to very shortfall.
- Low space requirement to achieve both drying and cooling.
- The use of counter current drying and cooling in a single unit.
- Low drive power consumption due to the balanced load of the product around the axis of rotation.
- Lower maintenance cost due to fewer items of ancillary equipment.
- Moisture reduction from 1.5 % to 0.02-0.03 %
- Dust free environment and avoids the material loss due to no dust emission.
