Patent ID: 7691183
Filing Date: 2010-04-06
Classification: B01D

Abstract:
1. Method of drying the compressed gas of a compressor system including at least two pressure stages connected in series by a pressure pipe, and a dryer with at least two pressure vessels which are filled with a desiccant or drying agent, and which pressure vessels work alternately, such that when a first drying pressure vessel is in action to dry the compressed gas, a second regenerating pressure vessel is being regenerated, said method comprising the steps: in a first, drying phase, in order to regenerate the second pressure vessel, compressed gas is non-cooled and is guided through the second regenerating pressure vessel, and in order to subsequently dry the compressed gas, the compressed gas is cooled first in a cooler without passing through either of the pressure stages and is then sent through the first drying pressure vessel; and in a second, cooling phase, before the end of the regeneration cycle of the second regenerating pressure vessel, a part of the compressed gas that is guided through the second regenerating pressure vessel, is first cooled before being sent through the second regenerating pressure vessel, and, after passing through the second regenerating pressure vessel, is guided to the pressure pipe between said two pressure stages and compressed by one of said pressure stages.