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US3882671A Expired / Lapsed US ⏱️ 0.0 years remaining

Gasification method with fuel gas cooling

Assignee: Brayton Cycle Improvement Association
•
Filing: 1974-01-02
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Granted: 1975-05-13
•
Expires: 1994-01-02
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Abstract

Abstract An open Brayton cycle, preferably with refrigerated air intake, is operated with dirty fuel containing contaminants which are chemically corrosive to steel or which in the gasification of the fuel are tranformed into such compounds, such as coal, for example high sulfur coal, high sulfur fuel oil or fuel oil containing vanadium compounds, and the like. The dirty fuel is first gasified by partial combustion with hot air, enriched air or oxygen, dry quenched by contact with cool combustion gases to a temperature at which contaminants, such as hydrogen sulfide, are no longer corrosive to steel, cooled, preferably in a waste heat boiler, and solid and/or corrosive gaseous contaminants removed. Refrigerated atmospheric air is compressed, the compressed air heated by heat exchange with Brayton cycle turbine exhaust gas, a portion is used as combustion air in the Brayton cycle combustor and a portion used for partial oxidation of the dirty fuel, the combustor receiving cool, clean gas from the partial oxidation and heated up by heat exchangne with turbine exhaust gases. After combustion the combustion gases are passed through the open Brayton cycle turbine.

Inventors

  • 👤 William H Nebgen

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 08:57
CPC Classifications
F; F25; F25B; F25B11/00; F25B11/02; F01; F01K; F01K17/00; F01K17/06; F01K23/00; F01K23/02; F01K23/06; F01K23/067; F02; F02C; F02C3/00; F02C3/20; F02C3/26; F02C7/00; F02C7/12; F02C7/14; F02C7/141; F02C7/143; F02G; F02G2250/00; F02G2250/03; F25B2400/00; F25B2400/14; F25B2400/141; Y; Y02; Y02E; Y02E20/00; Y02E20/16; Y02E20/18; Y02T; Y02T10/00; Y02T10/10; Y02T10/12

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 130 words
IN A BRAYTON CYCLE INCLUDING AIR COMPRESSION, COMBUSTION, AND COMBUSTION GAS EXPLANSION IN AN EXPANDER, SUCH AS A GAS TURBINE, THE IMPROVEMENT WHICH INCLUDES, IN COMBUSTION, A. HEATING THE COMPRESSED AIR, B. GASIFYING DIRTY FUEL WITH A PORTION OF HEATED COMPRESSED AIR, SAID FUEL ON GASIFICATION COMPRISING CONTAMINANTS WHICH ARE CHEMICALLY CORROSIVE TO STEEL AT TEMPERATURES AT LEAST AS LOW AS THE OPERATING TEMPERATURE OF THE EXPANDER, C. COOLING AND PURIFYING THE GASIFIED FUEL BY REMOVING SAID CHEMICALLY CORROSIVE CONTAMINANTS, THE COOLING BEING EFFECTED AT LEAST IN A MAJOR DEGREE BY MIXING A PORTION OF THE COOLED GASIFIED FUEL WITH THE UNCOOLED GASIFIED FUEL, D. COMBUSTION THE THUS PURIFIED GASIFIED FUEL WITH A SECOND PORTION OF THE HEATED COMPRESSED AIR, AND E. EXPANDING THE PRODUCTS OF COMBUSTION IN THE EXPANDER.
Claim 2
Dependent Claim 130 words
IN A BRAYTON CYCLE INCLUDING AIR COMPRESSION, COMBUSTION, AND COMBUSTION GAS EXPLANSION IN AN EXPANDER, SUCH AS A GAS TURBINE, THE IMPROVEMENT WHICH INCLUDES, IN COMBUSTION, A. HEATING THE COMPRESSED AIR, B. GASIFYING DIRTY FUEL WITH A PORTION OF HEATED COMPRESSED AIR, SAID FUEL ON GASIFICATION COMPRISING CONTAMINANTS WHICH ARE CHEMICALLY CORROSIVE TO STEEL AT TEMPERATURES AT LEAST AS LOW AS THE OPERATING TEMPERATURE OF THE EXPANDER, C. COOLING AND PURIFYING THE GASIFIED FUEL BY REMOVING SAID CHEMICALLY CORROSIVE CONTAMINANTS, THE COOLING BEING EFFECTED AT LEAST IN A MAJOR DEGREE BY MIXING A PORTION OF THE COOLED GASIFIED FUEL WITH THE UNCOOLED GASIFIED FUEL, D. COMBUSTION THE THUS PURIFIED GASIFIED FUEL WITH A SECOND PORTION OF THE HEATED COMPRESSED AIR, AND E. EXPANDING THE PRODUCTS OF COMBUSTION IN THE EXPANDER.
Claim 3
Dependent Claim 17 words
A Brayton cycle system according tp claim 1 in which the air to be compressed is refrigerated.
Claim 4
Dependent Claim 58 words
A Brayton cycle according to claim 1 in which the gases from the gasified dirty fuel are reduced in temperature to the point where the said contaminants do not chemically corrode steel and are passed through a waste heat boiler to generate steam, resulting in cooling the gases, and then purifying the cooled gases by removing said contaminants.
Claim 5
Dependent Claim 59 words
A Brayton cycle according to claim 2 in which the gases from the gasified dirty fuel are reduced in temperature to the point where the said contaminants do not chemically corrode steel and are passed through a waste heat boiler to generate steam, resulting in further cooling the gases, and then purifying the cooled gases by removing said contaminants.
Claim 6
Dependent Claim 76 words
A Brayton cycle system according to claim 3 in which the cooling of the gases from gasifying the dirty fuel is effected by mixing with coOled gases from the waste heat boiler whereby all of the heat in the gases from partial combustion of the dirty fuel is transformed into sensible heat at a lower temperature and at least some of the sensible heat is utilized for the generation of steam in the waste heat boiler.
Claim 7
Dependent Claim 32 words
A Brayton cycle system according to claim 4 in which the cooling of the gases from gasifying the dirty fuel is effected by mixing with cooled gases from the waste heat boiler.

References Cited (Backward Citations)

US2675672A Cited
US3276203A Cited
US2592749A Cited
US2701443A Cited
US2614915A Cited
US3002347A Cited
US3446014A Cited
US3796045A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-05-12 1978-11-11 1979-05-13 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-05-12 1982-11-11 1983-05-13 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-05-12 1986-11-11 1987-05-13 $7700.00 Window Closed / Lapsed

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