Continuous air supply:Special design is made to ensure the compressed
air is continuous when the tower is switching. Meanwhile, it can avoid
the air flow's momentary impact to the desiccan
2. Special design of the tower:
There are small support balls at the bottom of the towers and the desiccant
is filled in by special way. And a stainless halftone is fixed at the top of the
tower as a press. In this way, the tunnel effect can be avoided and the
mutual friction of the desiccant can be prevented.
Exterior heater is adopted to avoid the disadvantages of inner heater.
Its constant temperature controller ensures the steady temperature of the
regenerated air to prevent from overheating the desiccant.
made desiccant: Adopts the high efficiency desiccant
Steady dew point and low pressure dew point
Low purge rate: There is no air loss during the period of blower heating
regeneration. The cold
Blowing is about 50 minutes with a little air loss to
ensure the stabilization of the dew point.
External Heat Reactivated Dryers
Re-activated Dryers are designed with no loss of
compressed air. Time cycle is 4+4 hours drying
towers are filled with desiccant. For
regeneration, a centrifugal air blower and an
electrical heater is provided. Desiccant is heated
upto 200oC by hot air for complete
These bulky sized dryers consumes more power as
compared to INTERNALLY HEAT REACTIVATED TYPE
DRYER. In capacities less than 500 NM3/hr, these
are uneconomical and not recommended. Since
regeneration of the desiccant is by atmospheric
air, these dryers offers dew point only upto (-)
40oC. As per cost these air dryers are
100% more costly as compared to internally heat
reactivated type dryers.
When loss of compressed air during regeneration is
not acceptable, then only one should use this type
of dryer. It can aslo be used when dew point
required is not critical. These are recommended
for capacities more than 500 NM3/hr only. The
operating pressure of these dryers is between 1
kg/cm2g to 50 kg/cm2g.
Capacities : 500 NM3/hr to 6000 NM3/hr
Pressure : from 1 kg/cm2g to 50 kg/cm2g
Dew Point : upto minus(-)40oC