Explain about the Torbed Dryer?

On the other hand, is a variation of the fluidized bed dryer. This is designed for use with particulate foods. Torbed dryers are used to dry hazelnuts, carrots, mushrooms, beef dices and shrimps. Grated cheese can also be dried in fluidized beds. The distinction between agitated bed and fluidized bed drier is a narrow one, since in each case an upward velocity of air sufficient to support the food particles is applied. In the case of the former the bed is less vigorously stirred than in the latter. It is necessary with driers of this type to decrease the air velocity as the particle dries in order to prevent the particles being lost from the system. The final drying is accomplished using bins. The fluidized bed principle represents an important advance that can be used for a wide range of particulate materials. Apart from the commercial drying of peas, beans and diced vegetables it is also used for drying potato granules, onion flakes and fruit pieces.