US4545787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing by-product oxygen from turbine power generation
Assignee: Air Products and Chemicals Inc
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Filing: 1984-07-30
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Granted: 1985-10-08
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Expires: 2004-07-30
Abstract
Abstract A method is set forth for the generation of net power and the recovery of by-product oxygen-enriched gas at low power requirements. Air is compressed to elevated temperature and pressure, at least a portion of the air is combusted and a portion of the oxygen is removed from the air or combustion effluent through a membrane or adsorbent before the oxygen lean combustion effluent is expanded through a turbine to recover power for the process and net power.
Inventors
- 👤 William P. Hegarty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:18
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/22; B01D53/02; B01D53/04; B01D53/047; B01D53/32; B01D53/326; F; F02; F02C; F02C6/00; F02C6/04; F02C6/10; B01D2256/00; B01D2256/10; B01D2256/12; B01D2257/00; B01D2257/10; B01D2257/104; B01D53/0462; Y; Y02; Y02E; Y02E20/00; Y02E20/16; Y02E20/34; Y02P; Y02P20/00; Y02P20/10; Y02P20/129
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
183 words
In a method for the generation of power in a combustion turbine and for the production of an oxygen-enriched by-product, comprising the steps of: compressing a feed airstream to an elevated pressure and temperature wherein the volume of air treated is in excess of that necessary for the combustion preceding the turbine; combusting a portion of the elevated pressure airstream with a fuel stream; bypassing another portion of the airstream around the combustion stage and quenching the combustion effluent with it; expanding the elevated pressure combustion product stream from said combustion through a turbine so as to provide power for the air compression and to recover net power from the system, the improvement comprising: (a) separating a portion of the oxygen in the elevated pressure stream prior to expansion in the turbine while the stream is still at elevated temperature above 400° F. by passage of the stream over a semipermeable membrane which is selective to the permeation of oxygen over nitrogen; and (b) recovering oxygen-enriched gas as a by-product stream and a resulting oxygen-depleted elevated pressure stream for expansion through said turbine.
Claim 2
Dependent Claim
183 words
In a method for the generation of power in a combustion turbine and for the production of an oxygen-enriched by-product, comprising the steps of: compressing a feed airstream to an elevated pressure and temperature wherein the volume of air treated is in excess of that necessary for the combustion preceding the turbine; combusting a portion of the elevated pressure airstream with a fuel stream; bypassing another portion of the airstream around the combustion stage and quenching the combustion effluent with it; expanding the elevated pressure combustion product stream from said combustion through a turbine so as to provide power for the air compression and to recover net power from the system, the improvement comprising: (a) separating a portion of the oxygen in the elevated pressure stream prior to expansion in the turbine while the stream is still at elevated temperature above 400° F. by passage of the stream over a semipermeable membrane which is selective to the permeation of oxygen over nitrogen; and (b) recovering oxygen-enriched gas as a by-product stream and a resulting oxygen-depleted elevated pressure stream for expansion through said turbine.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein the effluent from the combustion turbine is used to produce steam to generate additional net power.
Claim 4
Dependent Claim
35 words
The method of claim 1 wherein at least a portion of the effluent of the combustion turbine is heat exchanged against the air feed to preheat the same prior to combustion of the air feed.
Claim 5
Dependent Claim
37 words
The method of claim 1 wherein at least a portion of the effluent from the combustion turbine is heat exchanged with the feed air stream prior to the separation of oxygen to heat the feed air stream.
Claim 6
Dependent Claim
19 words
The method of claim 1 wherein the air compressor is mechanically linked to and driven by the combustion turbine.
Claim 7
Dependent Claim
19 words
The method of claim 1 wherein the net power is recovered in a generator which produces net electrical power.
Claim 8
Dependent Claim
22 words
The method of claim 1 wherein the air compressor provides in excess of 300% of the air requirements of the combustion zone.
Claim 9
Independent Claim
167 words
A method for the generation of net power in a combustion turbine and for the production of an oxygen-enriched by-product, comprising the steps of: (a) compressing a feed airstream to an elevated pressure and temperature wherein the volume of air treated is in excess of that necessary for the combustion preceding the turbine; (b) separating a portion of the oxygen in the compressed airstream while still at elevated temperature above 400° F. by passage of the stream over a semipermeable membrane which is selective to the permeation of oxygen over nitrogen; (c) recovering oxygen-enriched gas as a by-product stream and a resulting oxygen-depleted airstream; (d) combusting a portion of the oxygen-depleted airstream with a fuel stream; (e) bypassing another portion of the oxygen-depleted air stream around the combusting step and quenching the combustion product stream with it; and (f) expanding the combustion product stream from said combustion through a turbine so as to provide power for the air compression and to recover net power from the system.
Claim 10
Independent Claim
167 words
A method for the generation of net power in a combustion turbine and for the production of an oxygen-enriched by-product, comprising the steps of: (a) compressing a feed airstream to an elevated pressure and temperature wherein the volume of air treated is in excess of that necessary for the combustion preceding the turbine; (b) separating a portion of the oxygen in the compressed airstream while still at elevated temperature above 400° F. by passage of the stream over a semipermeable membrane which is selective to the permeation of oxygen over nitrogen; (c) recovering oxygen-enriched gas as a by-product stream and a resulting oxygen-depleted airstream; (d) combusting a portion of the oxygen-depleted airstream with a fuel stream; (e) bypassing another portion of the oxygen-depleted air stream around the combusting step and quenching the combustion product stream with it; and (f) expanding the combustion product stream from said combustion through a turbine so as to provide power for the air compression and to recover net power from the system.
Claim 11
Independent Claim
168 words
A method for the generation of net power in a combustion turbine and for the production of an oxygen-enriched by-product, comprising the steps of: (a) compressing a feed airstream to an elevated pressure and temperature wherein the volume of air treated is in excess of that necessary for the combustion preceding the turbine; (b) combusting a portion of the airstream with a fuel stream; (c) bypassing another portion of the air stream around the combustion step and quenching the combustion product stream with it; (d) separating a portion of the oxygen in the elevated pressure combustion product stream while still at elevated temperature above 400° F. by passage of the stream over a semipermeable membrane which is selective to the permeation of oxygen over nitrogen; (e) recovering oxygen-enriched gas as a by-product stream and a resulting oxygen-depleted airstream; and (f) expanding the combustion product stream from said combustion through a turbine so as to provide power for the air compression and to recover net power from the system.
Claim 12
Independent Claim
168 words
A method for the generation of net power in a combustion turbine and for the production of an oxygen-enriched by-product, comprising the steps of: (a) compressing a feed airstream to an elevated pressure and temperature wherein the volume of air treated is in excess of that necessary for the combustion preceding the turbine; (b) combusting a portion of the airstream with a fuel stream; (c) bypassing another portion of the air stream around the combustion step and quenching the combustion product stream with it; (d) separating a portion of the oxygen in the elevated pressure combustion product stream while still at elevated temperature above 400° F. by passage of the stream over a semipermeable membrane which is selective to the permeation of oxygen over nitrogen; (e) recovering oxygen-enriched gas as a by-product stream and a resulting oxygen-depleted airstream; and (f) expanding the combustion product stream from said combustion through a turbine so as to provide power for the air compression and to recover net power from the system.
Claim 13
Dependent Claim
193 words
In a method for the generation of power in a combustion turbine and for the production of an oxygen-enriched by-product, comprising the steps of: compressing a feed airstream to an elevated pressure and temperature wherein the volume of air treated is in excess of that necessary for the combustion preceding the turbine; combusting a portion of the elevated pressure airstream with a fuel stream; bypassing another portion of the airstream around the combustion stage and quenching the combustion effluent with said bypassed portion; expanding the elevated pressure combustion product stream from said combustion through a turbine so as to provide power for the air compression and to recover net power from the system, the improvement comprising: (a) separating a portion of the oxygen in the elevated pressure stream prior to expansion in the turbine while the stream is still at elevated temperature above 400° F. by passage of the stream through switching beds of an adsorbent selective to the retention of oxygen over nitrogen in a pressure and/or temperature swing adsorption cycle, and (b) recovering oxygen-enriched gas as a by-product stream and a resulting oxygen-depleted elevated pressure stream for expansion through said turbine.
Claim 14
Dependent Claim
193 words
In a method for the generation of power in a combustion turbine and for the production of an oxygen-enriched by-product, comprising the steps of: compressing a feed airstream to an elevated pressure and temperature wherein the volume of air treated is in excess of that necessary for the combustion preceding the turbine; combusting a portion of the elevated pressure airstream with a fuel stream; bypassing another portion of the airstream around the combustion stage and quenching the combustion effluent with said bypassed portion; expanding the elevated pressure combustion product stream from said combustion through a turbine so as to provide power for the air compression and to recover net power from the system, the improvement comprising: (a) separating a portion of the oxygen in the elevated pressure stream prior to expansion in the turbine while the stream is still at elevated temperature above 400° F. by passage of the stream through switching beds of an adsorbent selective to the retention of oxygen over nitrogen in a pressure and/or temperature swing adsorption cycle, and (b) recovering oxygen-enriched gas as a by-product stream and a resulting oxygen-depleted elevated pressure stream for expansion through said turbine.
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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) | 1988-10-07 | 1989-04-08 | 1989-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-07 | 1993-04-08 | 1993-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-07 | 1997-04-08 | 1997-10-08 | $7700.00 | Window Closed / Lapsed |