Agitated pan dryers

An agitated open pan dryer is somewhat more complicated mechanically. This is a short cylinder whose axis and agitator are vertical. The agitator can enter from either the top or the bottom. 

As with the paddle dryers, these are mostly considered to be indirect dryers since heat transfer is from the jacket. If the product is a sticky, pasty material one may wish to use this design. The advantage of the pan dryer is the availability of several heated agitator designs which improve the overall heat transfer rate appreciably over a simple heated jacket the reason is the same as mentioned in the previous section on paddle dryers. As mentioned earlier, venting of the dryer is necessary to remove the evaporated vapors. 

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Evaluate heating due to sustained agitation in agitated pan dryers... 

Agitated-pan Dryers. Material is placed in covered shallow1 puns, Pans arc jacketed for heating. An agitator stirs the material constantly. This design may be operated at atmospheric pressure or under vacuum. 

Vertical Agitated Dryers This classification includes vertical pan dryers, filter dryers, and spherical and conical dryers. 

Vertical fan dryer The basic vertical pan dryer consists of a short, squat vertical cylinder (Fig. 12-52 and Table 12-24) with an outer heating jacket and an internal rotating agitator, again with the axis... 

Vertical Vacuum Pan Dryers. The agitated vertical dryer (Fig. 3.) has been designed for drying many different products which may come from centrifuges or filters. Generally, the body is formed by a vertical cylindrical casing with a flat bottom flanged to the top cover head. The unit is fully heated by an outside half-pipe jacket welded on the cylindrical wall, the bottom and the top head. 

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