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.
