Contact Dryer with Continuous Product Movement due to Gravity

12 Contact Dryer with Continuous Product Movement due to Gravity 

In a tumbler dryer, free-flowing products are dried under vacuum. Through a shift in the axis of rotation and the vessel axis, the jacket-heated drying vessel has a tumbling motion. The product inside the dryer follows this motion due to gravitational forces 

In a double cone dryer ( mixing dryer ) a drying drum with the form of a double cone revolves around an axis of rotation, which is perpendicular to the drum axis. Bulk material with a poorer flow behavior is dried in batches, usually under vacuum conditions. 

Contact Rotary Ttabe Dryer (Contact Drum Dryer) [5.30] 

The rotary dryer in Fig. 5-30, with a jacket heated by flue gas, for example, is also suitable for free-flowing and dusty products. In a contact rotary tube dryer, the product is guided through the rotary drum by arranged tube bundles. The heat required for the drying is transferred from a heating medium flowing in the shell. 

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