Blower purge dryer with cooling apparatus and methodology

An apparatus comprising:

• a twin tower heated purge blower dryer system having an intake conduit structured to receive compressed air from a compressor, a first drying tower with drying element, a second drying tower with drying element, a purge blower heater structured to provide heat to the first drying tower and second drying tower, an actuatable valve network structured to selectively open and close a plurality of fluid pathways;
• and a controller structured to:
• de-energize the purge blower heater after a heating event of the first drying tower used to dry the tower such that ambient air provided by a purge blower is used to cool down the first drying tower during a preliminary cool down event;
• and
• command a plurality of valves of a valve network to initiate a cooling event to reduce temperature of the first drying tower, the valve network configured as a result of the command to place the intake conduit in serial communication with the first drying tower and second drying tower, where the first drying tower is fluidically between the intake conduit and the second drying tower.

A method comprising:

• upon completion of a regenerative heating process, ceasing a heating of a first dryer of a multi-tower compressed air dryer;
• while the heating of the first dryer is ceased, operating a purge blower to blow ambient air as a cooling fluid to the first drying tower during a preliminary cool down event of the first drying tower,
• after operating the purge blower, routing compressed air from an intake conduit to the first dryer to cool the first dryer during a cooling process;
• and
• during the cooling process and after the routing, conveying the compressed air from the first dryer to a second dryer of the multi-tower compressed air dryer.