Different Types Of Dryers

Rotary Dryer
Spray Dryer
Flash Dryer
Batch Dryer
Double Drum Dryer

Rotary Dryer

Rotary dryers work by tumbling material in a rotating drum in the presence of a drying air. They can also be indirectly heated to avoid direct contact between the material and processing medium. The drum is positioned at a slight horizontal slope to allow gravity to assist in moving material through the drum.

Spray Dryer

A spray dryer takes a liquid stream and separates the solute or suspension as a solid and the solvent into a vapor. The solid is usually collected in a drum or cyclone. The liquid input stream is sprayed through a nozzle into a hot vapor stream and vaporized. Solids form as moisture quickly leaves the droplets.

Flash Dryer

Flash dryers offer an effective method of removing surface or unbound moisture from a feed product. The technology behind flash drying employs a low residence time within the actual dryer; thus, the unbound moisture is "flashed" off the feed. Flash dryers are essentially pneumatic dryers.

Batch Dryer

In batch dryers such as tray or rotary dryers, food is loaded onto trays in a chamber and left until drying is complete. In cabinet dryers, a series of trays containing the food are stacked in an insulated cabinet, with sufficient space between trays to allow airflow

Double Drum Dryer

A double-drum dryer is often used for products that are thinner, with lower viscosities, for example milk. The liquid is fed from above into the sump between the two main drums, which always rotate in opposite directions. The dried product is scraped off before the drums have completed a single rotation.