US 12,290,781 B2
Air dryer and method for drying compressed air using same
In Ho Ko, Pyeongtaek-si (KR)
Assigned to EUNHA AIRTECHNOLOGY CO., LTD., Asan-si (KR)
Filed by EUNHA AIRTECHNOLOGY CO., LTD., Asan-si (KR)
Filed on Apr. 12, 2022, as Appl. No. 17/718,405.
Claims priority of application No. 10-2021-0048684 (KR), filed on Apr. 14, 2021.
Prior Publication US 2022/0331734 A1, Oct. 20, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. B01D 53/26 (2006.01); B01D 53/14 (2006.01)
CPC B01D 53/265 (2013.01) [B01D 53/1425 (2013.01); B01D 53/263 (2013.01); B01D 2257/80 (2013.01); B01D 2259/40003 (2013.01)] 7 Claims
OG exemplary drawing
 
7. A method for drying compressed air, comprising:
pressurizing wet air using a main compressor and supplying compressed wet air to an inlet line;
a dehumidification process in which compressed wet air supplied from the inlet line is passing through a preset dehumidification tank between a pair of main air dryer dehumidification tanks in which a dehumidifying agent is filled, moisture of the wet air is absorbed in the dehumidifying agent, and produced dry air is discharged to an outlet line;
a heating process in which separate regeneration special dry air is supplied from a regeneration special dryer and heated by a heating unit installed in a heating line to heat and regenerate the dehumidifying agent that absorbs the moisture included in another dehumidification tank that has performed the dehumidification process already while the dehumidification process is progressing, and heated regeneration special dry air is supplied to another dehumidification tank and passes therethrough, and then, the dehumidifying agent that absorbs the moisture is heated and the moisture is detached; and
a cooling process of 1 to 3 hours such that hot air in a wet steam state reaches room temperature in a state in which power of the heating unit is shut off and driving is stopped after the heating process is finished,
wherein the method further comprises:
setting a third direction switching valve unit configured to transfer a path of the regeneration special dry air supplied from the regeneration special dryer to either one direction between a direction to the outlet line or a direction to the heating unit such that the regeneration special dry air supplied from the regeneration special dryer is transferred to the outlet line.