Dual stripper with water sweep gas

Patent metadata

Field	Value
Publication number	US-10688435-B2
Application number	US-201815896156-A
Country	US
Kind code	B2
Filing date	Feb 14, 2018
Priority date	Feb 27, 2017
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

An environmental control system includes an air conditioning subsystem and a contaminant removal subsystem downstream of the environment to be conditioned. The contaminant removal subsystem includes a first gas-liquid contactor-separator, a second gas-liquid contactor-separator, and a third gas-liquid contactor-separator. One of the first, the second, and the third gas-liquid contactor-separators is configured to receive used absorbent liquid having at least a first contaminant and discharge at least a first contaminant for recovery and reuse. Another of the first, the second and the third gas-liquid contactor-separators is configured to receive used absorbent liquid having at least a second contaminant and discharge at least the second contaminant for recovery and reuse.

First claim

We claim:

1. An environmental control system, comprising:
an air conditioning subsystem;
a contaminant removal subsystem downstream of the environment to be conditioned; and
a mix manifold intermediate the air conditioning subsystem and the contaminant removal subsystem,
wherein the contaminant removal subsystem includes:
a first gas-liquid contactor-separator;
a second gas-liquid contactor-separator;
a third gas-liquid contactor-separator; and

wherein one of the first, the second, and the third gas-liquid contactor-separators is configured to:
receive used absorbent liquid having at least a first contaminant;
discharge at least a first contaminant for recovery and reuse;

wherein another of the first, the second and the third gas-liquid contactor-separators is configured to:
receive used absorbent liquid having at least a second contaminant;
discharge at least a second contaminant for recovery and reuse.

2. The contaminant removal subsystem of claim 1 , further comprising a water vaporizer downstream of the second gas-liquid contactor separator.

3. The contaminant removal subsystem of claim 1 , further comprising a water vaporizer downstream of the third gas-liquid contactor-separator.

4. The contaminant removal subsystem of claim 1 , further comprising a dehumidifier downstream of the second gas-liquid contactor-separator.

5. The contaminant removal subsystem of claim 1 , wherein the first, the second, and the third gas-liquid contactor-separators comprise a hollow fiber membrane bundle.

6. A contaminant removal subsystem, comprising:
a first gas-liquid contactor-separator;
a second gas-liquid contactor-separator downstream of the first gas-liquid contactor-separator; and
a third gas-liquid contactor-separator downstream of the second gas-liquid contactor-separator;
wherein the first gas-liquid contactor-separator is configured to:
receive a clean absorbent liquid; and
discharge a used absorbent liquid;

wherein the second gas-liquid contactor-separator is configured to:
receive the used absorbent liquid discharged from the first gas-liquid contactor-separator;
discharge a first contaminant, from the used liquid absorbent, for recovery and reuse; and
discharge partially regenerated absorbent liquid;

wherein the third gas-liquid contactor-separator is configured to:
receive the partially regenerated absorbent liquid discharged from the second gas-liquid contactor-separator;
receive a sweep gas; and
discharge a second contaminant, from the partially regenerated liquid absorbent, for recovery and reuse.

7. The subsystem of claim 6 , further comprising a water vaporizer downstream of the second gas-liquid contactor-separator.

8. The subsystem of claim 6 , further comprising a water vaporizer downstream of the third gas-liquid contactor-separator.

9. The subsystem of claim 6 , further comprising a dehumidifier downstream of the second gas-liquid contactor-separator.

10. The subsystem of claim 6 , wherein the first contaminant comprises carbon dioxide.

11. The subsystem of claim 6 , wherein the second contaminant comprises water.

12. The subsystem of claim 6 , wherein the second gas-liquid contactor-separator discharges the first and the second contaminants.

13. A contaminant removal subsystem, comprising:
a scrubber;
a first stripper downstream of the scrubber;
a second stripper downstream of the first stripper; and
a water vaporizer downstream of the first stripper;
wherein the first stripper is configured to discharge a first contaminant for recovery and reuse;
wherein the second stripper is configured to discharge a second contaminant for recovery and reuse;
wherein the water vaporizer is configured to provide a sweep gas to the first stripper; and
wherein the scrubber is configured to discharge a sweep gas to the second stripper.

14. The subsystem of claim 13 , further comprising a dehumidifier downstream of the first stripper and configured to discharge the first contaminant for recovery and reuse.

15. The subsystem of claim 13 , wherein the scrubber is configured to receive a clean liquid absorbent and discharge a used liquid absorbent to the first stripper.

16. The subsystem of claim 13 , wherein the first contaminant comprises carbon dioxide.

17. The subsystem of claim 13 , wherein the second contaminant comprises water.

Assignees

• Honeywell Int Inc

Inventors

• Henson Phoebe
• Yates Stephen
• Isobe Jun
• Kamire Rebecca

Classifications

• Y02C20/40

  of CO2 · CPC title

• Y02T50/50

  On board measures aiming to increase energy efficiency · CPC title

• Y02T50/40

  Weight reduction · CPC title

• B64G1/48

  for treatment of the atmosphere (B64G1/50 takes precedence) · CPC title

• B64D2013/0651

  comprising filters, e.g. dust filters · CPC title