Wet, compressed air, controlled by butterfly valves, enters the base of the online vessel, Tower 1, after passing through the pre-filter (A).
As the compressed air passes through Tower 1, moisture is removed, lowering the dew point to -40°F.
Dry, compressed air exits the top of the vessel,passes through a check valve (C) and flows downstream, through the after filter, and then to the point of use.
While Tower 1 is drying, Tower 2’s saturated desiccant bed goes offline and depressurizes to ambient through an angle seat globe valve (D). A muffler attenuates the noise of depressurization.
After Tower 2 has depressurized, a blower (E) draws in ambient air for regeneration.
The ambient air is heated to 400°F, giving it the energy required to initiate and accomplish desorption, after which it passes through a check valve (F) and enters the top of the regenerating vessel.
As the hot, ambient air passes through Tower 2’s desiccant bed, water molecules are released from the surface of the desiccant and enter the air stream.
At the end of the heating phase, the heater is turned off and regeneration air is directed through a water-cooled heat exchanger.
The blower circulates the cooled air back through the vessel.
As the cooled air passes through the desiccant bed, it picks up heat energy which is removed from the system via the water-cooled heat exchanger. The closed-loop cycle continues until the bed temperature is lowered to its operation point without the use of purge air.