Innovative dryers. Closure
convection heating (c) radiant heating, and (d) dielectric heating. Freeze drying is classified as a special case of conduction heating. The next subdivision is the type of drying vessel: tray, rotating drum, fluidized bed, pneumatic, or spray [10] [11]. In some cases two or more different types of dryer are required to carry out the.
Drying is often necessary in various industrial operations mechanism of moisture transport in different solids may be broadly classified into (i) transport by liquid Computer control of dryers in sophisticated driers also results in important savings in energy. 4. DRYING EQUIPMENT. 4.1 Batch Type Dryers. 4.1.1 Tray Dryer.
myriad of dryer types is a consequence of the different behavior that the solid exhibits during drying, the particular product needs, and many economic considerations. 2.1. Convection Drying. The methods of convection drying differ from one another in the manner by which the moist solid contacts the drying agent, which is
selection of appropriate dryer types for a given application. Indeed, for an optimal selection of process, one must examine the overall flowsheet as well as the “drying system." This chapter will be confined, however, only to the classification and selection of dryers. Another important point to note is that several dryer types (or
Several different configurations are in use and all fall into the category of conduction-type dryers. The most usual type of heating is by steam although hot water or one of the proprietary heat transfer fluids can be used. Two particular types are the double-cone dryer (Fig. 4) with capacities up to. 400 ft3 and the agitated-pan
Fluid bed dryer is an entirely different kind of pneumatic conveying dryer. Fluid-bed drying permits continuous, large-scale drying of foods without over drying. The high heat transfer rates make it an economical process, and the lack of mechanical parts ensures low maintenance costs. The rapid mixing in the bed provides

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March 2018