Method for operating a gas turbine and a gas turbine for implementing the method
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02C-001/06
F02C-001/00
출원번호
UP-0275477
(2006-01-09)
등록번호
US-7574855
(2009-08-31)
발명자
/ 주소
Benz, Eribert
Flohr, Peter
Hellat, Jaan
Webb, Graham
출원인 / 주소
ALSTOM Technology Ltd.
대리인 / 주소
Kenealy, Cermak
인용정보
피인용 횟수 :
0인용 특허 :
12
초록▼
In a method for operating a gas turbine (11) in a combined cycle power plant (40), air is drawn in and compressed though the gas turbine (11), the compressed air is led to a combustor (18, 19) to burn a syngas recovered from a fossil fuel, especially coal, and the gases that result in the course of
In a method for operating a gas turbine (11) in a combined cycle power plant (40), air is drawn in and compressed though the gas turbine (11), the compressed air is led to a combustor (18, 19) to burn a syngas recovered from a fossil fuel, especially coal, and the gases that result in the course of the combustion are expanded in a downstream turbine (16, 17). In such a method, an improved degree of efficiency is achieved by virtue of the fact that a gas turbine (11) with reheating is used, which includes two combustors (18, 19) and two turbines (16, 17); in the first combustor (18), syngas is burned with the compressed air, and the resultant hot gases, e.g., flue gases, are expanded in the first turbine (16), and in the second combustor syngas is burned by the gases coming from the first turbine (16), and the resultant hot gases are expanded in the second turbine (17).
대표청구항▼
The invention claimed is: 1. A method for operating a gas turbine, the method comprising: drawing in and compressing air with the gas turbine; conducting compressed air to a combustion chamber; combusting a syngas that is generated from a fossil fuel with said compressed air, to generate hot gases;
The invention claimed is: 1. A method for operating a gas turbine, the method comprising: drawing in and compressing air with the gas turbine; conducting compressed air to a combustion chamber; combusting a syngas that is generated from a fossil fuel with said compressed air, to generate hot gases; expanding the combustion hot gases in a downstream turbine; separating a portion of the compressed air into oxygen and nitrogen; using separated oxygen in a fossil fuel gasifier to produce the syngas; using a portion of the compressed air to cool parts of the gas turbine that are exposed to hot gases; wherein said gas turbine comprises a gas turbine with reheating including two combustors and two turbines, such that in a first of said two combustors, said syngas is combusted using the compressed air and the resultant hot gases are expanded in a first of said two turbines, and such that in a second of said two combustors, said syngas is combusted using gases from said first turbine and the resultant hot gases are expanded in a second of said two turbines; diluting, with 80-100% of the separated nitrogen, the syngas that is combusted in the second combustor; and diluting the syngas that is combusted in the first combustor with the remaining portion of the separated nitrogen. 2. A method according to claim 1, further comprising: directly blowing the nitrogen that occurs in conjunction with the separation of the air into the second combustor. 3. A method according to claim 1, further comprising: compressing to a higher pressure in a compressor the nitrogen provided for the first combustor, prior to being blown into the combustor. 4. A method according to claim 1, further comprising: blowing into the second combustor a portion of the syngas produced in the coal gasifier without further compression. 5. A method according to claim 1, further comprising: compressing a portion of the syngas produced in the coal gasifier to a higher pressure in a compressor; and thereafter blowing said compressed portion of the syngas into the first combustor. 6. A method according to claim 1, further comprising: blowing into the combustors the syngas and the diluting nitrogen in a concentric arrangement, such that a nitrogen jet surrounds a syngas jet in the form of a mantle, in a direction perpendicular to the direction of inflowing compressed air, which compressed air flows into the combustors, or of outgoing air from the first turbine. 7. A method according to claim 1, wherein the gas turbine is part of a combined cycle power plant. 8. A method according to claim 1, wherein said fossil fuel comprises coal.
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이 특허에 인용된 특허 (12)
Alderson Edgar D. (Ballston Spa NY) Farrell William M. (Cincinnati OH), Air bottoming cycle for coal gasification plant.
Althaus Rolf (Flawil CHX) Farkas Franz (Zurich CHX) Graf Peter (Waldshut-Tiengen DEX) Hausermann Fredy (Rieden bei Nussbaumen CHX) Kreis Erhard (Otelfingen CHX), Gas turbine group with reheat combustor.
Allam Rodney J. (Guilford GB2) Topham Anthony (Walton on Thames GB2), Integrated air separation plant - integrated gasification combined cycle power generator.
Plumley Donald R. (Scotia NY) Anand Ashok K. (Clifton Park NY), Integrated coal gasification plant and combined cycle system with air bleed and steam injection.
Paull Peter L. (Weston CT) Muenger James R. (Beacon NY) Gilmer William N. (Patterson NY), Process for the generation of power from solid carbonaceous fuels.
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