Patent US4561865A successfully refreshed from Google Patents.
US4561865A
Expired / Lapsed
US
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Single bed pressure swing adsorption gas separation system
Assignee: XORBOX Corp
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Filing: 1983-11-01
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Granted: 1985-12-31
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Expires: 2003-11-01
Abstract
Abstract A single bed PSA system having a high pressure compressor embodiment and a low pressure fan driven embodiment. Numerous features are disclosed, including a pressure response technique wherein the actual times of the steps within the cycle are adjusted in accordance with demand. Sub-atmospheric pressure is utilized to enhance the purging step of the single bed and to enhance efficiency as well.
Inventors
- 👤 Norman R. McCombs
- 👤 Ravinder K. Bansal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:04
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/047; B01D53/053; B01D2256/00; B01D2256/12; B01D2259/00; B01D2259/40; B01D2259/40003; B01D2259/40011; B01D2259/40058; B01D2259/4006; B01D2259/401; B01D2259/45; B01D2259/4533; B01D2259/4566
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
158 words
A PSA system having a single bed, said system including a PSA cycle, means to cause said cycle to operate said single bed between highest pressure, lowest pressure, and intermediate pressure, said system including tank means for receiving the output of product gas from said single bed, said system comprising control means, said control means causing said cycle to perform a production step wherein the pressure in said bed and said tank means are increased from said intermediate pressure to said highest pressure, said control means causing said cycle to perform a purge step wherein the pressure in said bed is decreased from said highest pressure to said lowest pressure, conduit means containing valve means interconnecting said single bed and said valve means, and said control means causing said last mentioned valve means and said cycle to perform a pressure equalization step wherein the pressures in said bed and said tank means are equalized at said intermediate pressure.
Claim 2
Dependent Claim
158 words
A PSA system having a single bed, said system including a PSA cycle, means to cause said cycle to operate said single bed between highest pressure, lowest pressure, and intermediate pressure, said system including tank means for receiving the output of product gas from said single bed, said system comprising control means, said control means causing said cycle to perform a production step wherein the pressure in said bed and said tank means are increased from said intermediate pressure to said highest pressure, said control means causing said cycle to perform a purge step wherein the pressure in said bed is decreased from said highest pressure to said lowest pressure, conduit means containing valve means interconnecting said single bed and said valve means, and said control means causing said last mentioned valve means and said cycle to perform a pressure equalization step wherein the pressures in said bed and said tank means are equalized at said intermediate pressure.
Claim 3
Dependent Claim
11 words
The system of claim 1, wherein said lowest pressure in sub-atmospheric.
Claim 4
Dependent Claim
34 words
The system of claim 2, and blower means to create both said highest pressure at the outlet side of said blower means and said lowest pressure at the intake side of said blower means.
Claim 5
Dependent Claim
22 words
The system of claim 1, and means to cause said pressure decrease in said bed during said purge step to occur rapidly.
Claim 6
Dependent Claim
45 words
The system of claim 1, compressed air supply means, Venturi waste gas extractor means, and means to flow compressed air from said supply means through said waste gas extractor means to cause said Venturi extractor means to draw waste gas out of said single bed.
Claim 7
Dependent Claim
16 words
The system of claim 1, and a normally closed feed valve upstream of said single bed.
Claim 8
Dependent Claim
18 words
The system of claim 1, and timer means for controlling the duration of each step in said cycle.
Claim 9
Dependent Claim
21 words
The system of claim 1, and pressure equalization tank means associated with the output of product gas from said single bed.
Claim 10
Dependent Claim
23 words
The system of claim 1, wherein air is the gas operated upon by said PSA cycle, and wherein oxygen is the product gas.
Claim 11
Dependent Claim
38 words
The system of claim 1, heat exchanger means, and means to so position said heat exchanger means that a heat exchange occurs between gas fed to said single bed and purge gas directed away from said single bed.
Claim 12
Dependent Claim
130 words
A pressure swing process for fractioning at least one component gas from a mixture of gasses by selective adsorption in only a single adsorption zone and utilizing tank means to receive the output of said at least one component gas from said single adsorption zone, comprising the steps of operating said single adsorption zone between highest pressure, lowest pressure and intermediate pressure, the process including a production step wherein the pressures in said zone and in said tank means are increased from said intermediate pressure to said highest pressure, a purge step wherein the pressure in said zone is decreased from said highest pressure to said lowest pressure, and a pressure equalization step wherein the pressures in said zone and in said tank means are equalized at said intermediate pressure.
Claim 13
Dependent Claim
130 words
A pressure swing process for fractioning at least one component gas from a mixture of gasses by selective adsorption in only a single adsorption zone and utilizing tank means to receive the output of said at least one component gas from said single adsorption zone, comprising the steps of operating said single adsorption zone between highest pressure, lowest pressure and intermediate pressure, the process including a production step wherein the pressures in said zone and in said tank means are increased from said intermediate pressure to said highest pressure, a purge step wherein the pressure in said zone is decreased from said highest pressure to said lowest pressure, and a pressure equalization step wherein the pressures in said zone and in said tank means are equalized at said intermediate pressure.
Claim 14
Dependent Claim
31 words
The method of claim 11, and the step of performing a heat exchange between the mixture of gasses fed to said zone and the purge gas directed away from said zone.
Claim 15
Dependent Claim
16 words
The method of claim 11, and the step of causing said lowest pressure to be sub-atmospheric.
Claim 16
Dependent Claim
21 words
The method of claim 11, wherein said mixture of gasses is air and said at least one component gas is oxygen.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-30 | 1989-07-01 | 1989-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-30 | 1993-07-01 | 1993-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-30 | 1997-07-01 | 1997-12-31 | $7700.00 | Window Closed / Lapsed |