Patent ID: 11890574
Assignee: WELDFIT LLC
Field: Chemical engineering (Chemistry)
Classification: CPC B  F | IPC B

Claim 25:
26. A method to recover a process gas from a first volume at a first pressure to a second volume at a second pressure, the method comprising:
receiving the process gas from the first volume at the first pressure;
bringing the process gas down from the first pressure to an intermediate stage pressure below the first pressure by stepping the process gas down from the first pressure through one or more pressure control valves and reheating the process gas after being stepped down;
scrubbing liquid from the stepped-down process gas;
bringing the processes gas up from the intermediate staged pressure to a final staged pressure by stepping the process gas up through one or more compression cycles and cooling the process gas after being compressed; and
discharging the process gas at the final staged pressure to the second volume, the final staged pressure being equal to or greater than the second pressure,
wherein bringing the processes gas down from the first pressure to the intermediate staged pressure below the first pressure comprises measuring a first pressure of the process gas before being stepped down; measuring a second pressure of the process gas after being stepped down; and verifying the stepdown of the process gas based a comparison between the first and second pressures.