24
Heatless Desiccant Dryers
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Instruction Manual
Section 6:
Operation
Operation
Background / Function of the dryer
The dryer is designed to provide a smooth, controlled and uninterrupted
delivery of dry compressed air. Wet air passes through a pre-filter and travels
down to the bottom valve assembly. The air is then fed through the bottom
of the desiccant bed and moves through the high performance desiccant
until it becomes dry. On exit from the desiccant cartridge, the air is passed
through the outlet valve assembly.
During this process, the dryer control system cycles the process air between
the two desiccant towers. While one tower is on stream removing
water vapor, the other is being carefully depressurized in preparation for
regeneration. The desiccant bed is regenerated by expanding a small amount
of dry process air, or purge air, through the saturated desiccant.
Purge air passes to atmosphere through the silencer, which is fitted to an
exhaust valve. The chamber is then repressurized, with the control system
assuring each chamber is at full operational pressure prior to changeover.
This ensures a reliable and efficient operation. The air stream is switched and
the cycle repeats on a continuous basis.
Detailed Operational Description - Digital Display Controller
•
Refer to detailed operational schematics,
figure(s) 6.3 - 6.8.
•
Controller operates on a standard timed cycle
as detailed in Figures 6.3 through 6.8.
•
Operational status is displayed in text form on the
LCD display..
