Patent ID: 8986433
Filing Date: 2015-03-24
Classification: B01D

Abstract:
1. A system for regenerating desiccant in an air dryer comprising: a means to produce a primary high heating period and a secondary low heating period of blower purge air flows to a bed of desiccant within at least one tower vessel within said air dryer; a means to measure and control heater discharge temperatures and dew point of said at least one tower vessel; a means to dry purge at least one tower vessel within said air dryer for deep cooling, a means for measuring the desiccant bed bottom area temperature and terminating said dry purging based upon deep cooling of the desiccant bed; wherein, said primary high heating period of blower purging is followed by said secondary low heating period of blower purging to complete the heating phase in regenerating the desiccant, and, a means to terminate said low secondary heating period of blower purging and begin said dry purge means of at least one tower vessel within said air dryer for deep cooling, enabling the system to be cooled and repressurized and returned to a dryer mode cycle of operation.