POSTED：TAIDA      DATE：2017-03-31

 

As shown for the directly heated with hot air countercurrent operation of rotarydrum dryer, its subject is a slightly inclined rotating cylinder. Wet material from the rotor into the higher end of the hot air from the other side of the entry, gas-solid barrel in turn counter-current contact with the rotor rotation, the material flows under the action of gravity the lower end. Usually barrel wall switch plate with a number of blocks of copy, its role is to shed after he took the material in order to increase the drying surface area, increasing the drying rate, while also promoting material to run forward. When the rotor rotation one week, the material was so he took, and shed one, the material is equal to its distance from the forward drop height multiplied by the rate of rotor tilt. As shown in Figure 5-21, copy board type variety. Rotating cylinder with the same board can use a different copy, such as the first half of the structure can be used relatively simple copy board, while the latter part of using a structured copy more complex boards.

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