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Features
Desiccant dryers are generally made up of two cylinders. When the desiccant in one cylinder becomes moist, the air flow is transferred to the other cylinder while the first one dries.
Heated Dryers
The three main types of desiccant dryers are heatless, heated, and blower purge dryers. Heated dryers have a heating element that dries the saturated desiccant. They are more energy-efficient than other dryers but have a relatively short life.
Blower Purge
Blower purge desiccant dryers are similar to heated dryers, but they make use of an electric blower that pumps in uncompressed, heated air.
Heatless
Heatless desiccant dryers require large amounts of compressed air. They have the highest operating cost, because it takes longer for the desiccant itself to dry.
Laboratory Use
Desiccant drying is also employed in the laboratory to remove moisture from solvents and ensure that moisture doesn't contaminate chemical reactions.