K-MT10-95_EN_02
19
Function description
The dryer dries the compressed air supplied by the compressor and makes it
available for industrial use.
Upstream filters clean the compressed air and remove dust, dirt, oil, and water
droplets, before the compressed air reaches the dryer. Thus, an upstream filter is
also used for extending the service life of the drying agent.
Downstream filters clean the compressed air from drying agent abrasions, before
it is fed into the compressed air system.
The two vessels contain an extremely porous drying agent by means of which
humidity is removed from the compressed air and stored just as in a sponge. The
stored humidity is then removed again from the drying agent and re-introduced
into the ambient environment.
To this end, the two vessels alternate between different operating modes. Whilst
in one vessel, compressed air is de-humidified (adsorption), in the other vessel
the humid drying agent is prepared for another charge (regeneration). These two
states, which run in parallel during compressed air preparation, are described
below.
Adsorption
Via a compressor, humid compressed air is
supplied to the upstream filter. From here, the
compressed air flows upwards through the
absorption vessel, which is pressurised. In so
doing, the drying agent dehumidifies the air. The
dry compressed air is supplied to the pipe
network via the downstream filter.
Here, adsorption is shown in the
left vessel.
Regeneration (running in parallel to the adsorption)
At the same time the other vessel is prepared for a renewed take-up of humidity.
This process is called regeneration.
The regeneration is subdivided into three phases: expansion, dehumidification,
and pressure build-up.
With the
dewpoint-sensing control
option, the regeneration phase is followed by a
standby phase.