Flash drying is a pre-process to densification much like grinding. Flash dryer is used for suspension drying of powdery, ground or granulated material such as saw dust, coir pith and baggasse pith which are usually materials with moisture content of 35% of less

The second type of dryer is the concentric coloumn turbo dryer which consists of a jacketed drying column. the drying column is actually a pipe inserted inside another bigger pipe and hence the material passes through the same drying column twice. As a result this dryer can dry materials having moisture upto 50% on wet basis. Basic turbo dryer system consists of Screw Conveyor, Feeding Hopper, Main Drive, Conveying line including insulated drying column and conveyor through which wet or moist material is transported in the presence of hot air to the cyclone. A powerful low pressure centrifugal fan assures sufficient resiliance time for complete removal of excess moisture. Material is discharged through cyclone by means of a Rotary Air Lock
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