Hollow fiber membrane contactor scrubber/stripper for cabin carbon dioxide and humidity control

Patent metadata

Field	Value
Publication number	US-11707709-B2
Application number	US-202117465360-A
Country	US
Kind code	B2
Filing date	Sep 2, 2021
Priority date	Feb 27, 2017
Publication date	Jul 25, 2023
Grant date	Jul 25, 2023

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 dehumidifier disposed either upstream of the first gas-liquid contactor-separator or downstream of the second gas-liquid contactor-separator.

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;
wherein the contaminant removal subsystem includes:
a first gas-liquid contactor-separator;
a second gas-liquid contactor-separator; and

a dehumidifier disposed downstream of the second gas-liquid contactor-separator to produce a sweep gas to the second-gas liquid contactor-separator.

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

3. The system of claim 1 , wherein the first and second gas-liquid contactor-separators comprise a hollow fiber membrane bundle.

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

5. 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 dehumidifier disposed downstream of the second gas-liquid contactor-separator to produce a sweep gas to the second-gas liquid contactor-separator and to recover contaminants for reuse.

6. The subsystem of claim 5 , further comprising a condenser downstream of the second gas-liquid contactor-separator.

7. The subsystem of claim 5 , further comprising a compressor downstream of the second gas-liquid contactor-separator.

8. The subsystem of claim 5 , further comprising a water vaporizer downstream of the second gas-liquid contactor-separator.

9. The subsystem of claim 5 , wherein the liquid in the first gas-liquid contactor-separator is an ionic liquid.

10. The subsystem of claim 5 , wherein the first and the second gas-liquid contactor-separators comprise hollow fiber membrane bundles.

11. 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;
a dehumidifier or downstream of the second gas-liquid contactor-separator to produce a sweep gas to the second gas-liquid contactor-separator; and
a condenser downstream of the second gas-liquid contactor-separator;
wherein the condenser is configured to:
discharge liquid water for recovery and reuse;
discharge a contaminant for recovery and reuse.

12. The subsystem of claim 10 , further comprising a vacuum pump downstream of the second gas-liquid contactor-separator.

13. The subsystem of claim 10 , wherein the condenser is further configured to discharge contaminants that include CO2.

14. The subsystem of claim 10 , wherein the condenser is further configured to discharge contaminants that include water.

15. The subsystem of claim 10 , further comprising a water extractor downstream of the condenser.

16. The subsystem of claim 10 , wherein the discharged contaminant is CO2.

Assignees

• Honeywell Int Inc

Inventors

• Isobe Jun
• Yates Stephen
• Henson Phoebe
• Bonk Ted

Classifications

• B01D63/02

  Hollow fibre modules · CPC title

• B01D53/18 Primary

  Absorbing units; Liquid distributors therefor (B01D3/16, B01D3/26, B01D3/30 take precedence; packing elements B01J19/30, B01J19/32) · CPC title

• B01D53/1425

  Regeneration of liquid absorbents · CPC title

• B01D53/1475 Primary

  Removing carbon dioxide · CPC title

• B01D53/1493

  Selection of liquid materials for use as absorbents · CPC title