Patent ID: 11904271
Assignee: SPX FLOW TECHNOLOGY KOREA CO., LTD
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 4:
5. An air drying system for drying a compressed air flow comprising:
a pre-heater configured to receive a first compressed air flow and a second compressed air flow, the pre-heater including a first heat exchanger configured to transfer a first amount of heat from the first compressed air flow to the second compressed air flow;
a first dehumidifier configured to receive the first compressed air flow from the pre-heater, the first dehumidifier configured to condense and remove a first amount of moisture contained in the first compressed air flow, the first dehumidifier including:
a freezer in which a refrigerant flow circulates through a refrigeration cycle, and
a second heat exchanger including a first channel and a second channel, the first channel circulating the first compressed air flow and the second channel circulating the refrigerant flow, and a phase change material disposed between the first channel and the second channel,
wherein the second heat exchanger is configured to transfer a second amount of heat from the first compressed air flow to the refrigerant via the phase change material, whereby the transfer of the second amount of heat from the first compressed air flow causes the first amount of moisture in the first compressed air flow to condense and thereby removed from the first compressed air flow; and

a second dehumidifier including a dehumidifying tank carrying a deliquescent agent, the deliquescent agent having a moisture absorption ratio of less than or equal to 50% (≤RH 50), the second dehumidifier configured to further absorb a second amount of moisture from the first compressed air flow discharged from the first dehumidifier, the second dehumidifier configured to discharge the first compressed air flow with the second amount of moisture removed, the discharged first compressed air flow defining the second compressed air flow,
wherein the second compressed air flow is entirely transferred from the second dehumidifier to the pre-heater.