This dryer provides
an efficient, economical and easy to maintain method of drying compressed air
and gases. The drying medium (Silica gel or Activated Alumina ) is contained
in two carbon steel pressure vessels. While chamber I is drying, air is passed
over an electrical heater embedded in chamber II and carries out the desorbed
moisture of this chamber. This type of system utilizes about 2-3% of the gas
as a purge. It is an ideal system for gases requiring ultra low drying like
dew points upto (-80°C). Each column remains in line for about 6 hours. For
regeneration, the desiccant is heated for about 3 hours and then cooled for
another 3 hours before changeover. The operation is fully
automatic.
