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Desiccant dryers are used to dehydrate atmospheric air, or pure gases including H2, N2, O2, CO2, for use in pneumatic equipment. It is important for these gases to be purified and dehydrated before use to prevent corrosion and damage to machinery.
How it Works
Inlet air passes through the pre-filter and is distributed, by use of valves, to direct the air into one of the multiple adsorbent beds, commonly filled with activated alumina, which allows the air to be dehydrated and purified. Air leaves the adsorption bed, and passes through another series of values, which distributes the dry air to another filter before use. Air that is not outlet is used as regeneration air, and directed to a different adsorbent bed so that desiccant can be regenerated once capacity has been reached. A system with two or more beds can allow constant dry air production as one bed can regenerate while the other adsorbent bed is actively dehydrating the air stream.