Section II - Description
Dryer Operation
The dryer operation is designed to
give smooth, uninterrupted delivery
of compressed air to the designated
specification. During the cycle of
operation, the first pressure housing is
fully pressurized and air flow is directed
upwards through the desiccant cartridge,
removing moisture from the air during
its passage, to the minimum specified
dewpoint.
During the drying cycle, a small bleed of
dry air (purge) is directed to the opposite
pressure housing. This purge air flows
down through the desiccant cartridge and
to atmosphere by means of an exhaust
silencer, thereby effecting regeneration of
the desiccant.
After 0 seconds of operation, the
cartridge under regeneration is sealed by
the exhaust valve closing and the pressure
housing is brought up to full system
pressure by the purge air.
After 70 seconds, the pressure in the
first housing is released to atmosphere by
means of the corresponding exhaust valve
and the desiccant cartridge then operates
in regeneration mode. The main air flow
and drying function is then transferred to
the desiccant cartridge that was previously
under regeneration.
The cycle of operation continues in this
pattern with the cartridges switching
alternately between drying and
regenerating.
Component Description
Main Components (Reference the
illustration on page 6)
Item 2 (Control Unit)
- The top and bottom
valve blocks are operated by solenoids
within the control unit that determine the
pressure and direction of air flow into the
desiccant cartridges.
Item 8 (Pressure Housing)
- The cartridges
are contained within an extruded aluminum
pressure housing and pressure retaining
end plates. Process pressure and flow
through each desiccant cartridge is
controlled by means of top and bottom
valve blocks located between the two
pressure housings. The regenerating air
flow (purge) is controlled by a small orifice
plug located externally (front, central) on
the top valve block and is accessible with
the front panel removed.
Item 10 (Desiccant Cartridge)
- The
cartridges contain the agent (desiccant)
for drying compressed air. The desiccant
is housed in a clear tube that has a holder
permeable to air at both ends. Located
in the top of each cartridge is a -micron
filter for removal of residual dust from
the desiccant. The length of the cartridge
varies with the flow capacity of the dryer.
Item 11(Multiport Manifold)
- The dryer is
supplied as standard with inlet and outlet
ports configured left to right as viewed
from the front of the unit. There are several
optional porting arrangements available
by repositioning of port plugs. Reference
Section III - Installation.
Quincy Compressor-QMOD
