Flash dryers are also known as pneumatic dryers. Flash dryers are used for drying free flowing powders or cakes containing moisture. Flash dryers are suitable for heat sensitive products. Even the heat sensitive products can be dried at high inlet air temperatures due to very low residence time of the product in the flash duct.
Flash coolers are also known as conveying coolers. The principle of operation of flash coolers is similar to flash dryers except that the product comes in contact with ambient or cool air instead of hot air. Flash coolers are mostly used as ancillary systems to drying systems to cool the product while conveying it for storage.