IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0217686
(2011-08-25)
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등록번호 |
US-8266913
(2012-09-18)
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발명자
/ 주소 |
- Snook, Daniel David
- Wichmann, Lisa Anne
- Draper, Samuel David
- Dion Ouellet, Noémie
|
출원인 / 주소 |
|
대리인 / 주소 |
Sutherland Asbill & Brennan LLP
|
인용정보 |
피인용 횟수 :
60 인용 특허 :
50 |
초록
▼
A power plant arrangement and method of operation are provided. The power plant arrangement comprises at lease one main air compressor and one or more gas turbine assemblies. Each assembly comprises a turbine combustor for mixing a portion of a compressed ambient gas flow with a portion of a recircu
A power plant arrangement and method of operation are provided. The power plant arrangement comprises at lease one main air compressor and one or more gas turbine assemblies. Each assembly comprises a turbine combustor for mixing a portion of a compressed ambient gas flow with a portion of a recirculated low oxygen content gas flow and a fuel stream, and burning the combustible mixture to form the recirculated low oxygen content flow. The assembly further comprises a turbine compressor, fluidly connected to the turbine combustor, and connected to a turbine shaft that is arranged to be driven by rotation of a turbine. The assembly also comprises a recirculation loop for recirculating at least a portion of the recirculated low oxygen content gas flow from the turbine to the turbine compressor.
대표청구항
▼
1. A power plant arrangement, comprising: at least one main air compressor for compressing ambient air into a compressed ambient gas flow; andtwo or more gas turbine assemblies fluidly connected by an inter-train conduit, each comprising: a turbine combustor, fluidly connected to the at least one ma
1. A power plant arrangement, comprising: at least one main air compressor for compressing ambient air into a compressed ambient gas flow; andtwo or more gas turbine assemblies fluidly connected by an inter-train conduit, each comprising: a turbine combustor, fluidly connected to the at least one main air compressor, for mixing at least a first portion of the compressed ambient gas flow with at least a first portion of a recirculated low oxygen content gas flow and a fuel stream to form a combustible mixture and for burning the combustible mixture and forming the recirculated low oxygen content gas flow;a turbine connected to the turbine combustor and to a turbine shaft, and being arranged to be driven by the recirculated low oxygen content gas flow from the turbine combustor;a turbine compressor, fluidly connected to the turbine combustor, and connected to the turbine shaft and being arranged to be driven thereby; anda recirculation loop for recirculating at least a portion of the recirculated low oxygen content gas flow from the turbine to the turbine compressor. 2. The power plant arrangement of claim 1, wherein the two or more gas turbine assemblies each further comprise a booster compressor, fluidly connected to the at least one main air compressor and to the turbine combustor, for further compressing the at least a first portion of the compressed ambient gas flow. 3. The power plant arrangement of claim 1, wherein the two or more gas turbine assemblies each further comprise a turbine generator connected to the turbine by the turbine shaft and being arranged to be driven thereby. 4. The power plant arrangement of claim 1, wherein the two or more gas turbine assemblies each further comprise a recirculated gas flow cooler in the recirculation loop, configured to lower the temperature of the recirculated low oxygen content gas flow to a suitable temperature for delivery to the turbine compressor. 5. The power plant arrangement of claim 1, wherein the two or more gas turbine assemblies each further comprise a heat recovery steam generator in the recirculation loop, configured to receive the recirculated low oxygen content gas flow from the turbine for generation of steam using a steam turbine and a steam generator. 6. The power plant arrangement of claim 1, wherein the at least one main air compressor is arranged to be connected to the turbine shaft. 7. The power plant arrangement of claim 6, wherein the at least one main air compressor is arranged to be driven by the turbine shaft. 8. The power plant arrangement of claim 1, wherein the two or more gas turbine assemblies each further comprise a blower in the recirculation loop, configured to increase the pressure of the recirculated low oxygen content gas flow delivered to the turbine compressor. 9. The power plant arrangement of claim 8, wherein the blower is located in the recirculation loop downstream of a recirculated gas flow cooler. 10. The power plant arrangement of claim 8, wherein the blower is located in the recirculation loop upstream of a recirculated gas flow cooler. 11. The power plant arrangement of claim 1, wherein the two or more gas turbine assemblies each further comprise a recirculated gas flow extraction unit for extracting at lease a second portion of the recirculated low oxygen content gas flow from the respective gas turbine assembly. 12. The power plant arrangement of claim 11, wherein a gas separation system is fluidly connected to the recirculated gas flow extraction unit and the gas separation system is configured to produce at least a first process stream of concentrated carbon dioxide and a second process stream of concentrated nitrogen, both with a low oxygen content. 13. The power plant arrangement of claim 1, wherein the two or more gas turbine assemblies each further comprise a secondary flow path that delivers at least a second portion of the recirculated low oxygen content gas flow from the turbine compressor to the turbine as a secondary flow, and the secondary flow is further delivered into the recirculation loop after cooling and sealing the turbine. 14. The power plant arrangement of claim 1, wherein the power plant is configured for substantially stoichometric combustion. 15. A method for operating a power plant, comprising: compressing ambient air with at least one main air compressor to form a compressed ambient gas flow;delivering at least a first portion of the compressed ambient gas flow to at least one gas turbine assembly of a power plant comprising two or more gas turbine assemblies that are fluidly connected by an inter-train conduit, wherein the inter-train conduit further comprises an inter-train valve that is in a closed position and wherein a method for operating the at least one gas turbine assembly comprises:mixing the at least a first portion of the compressed ambient gas flow with at least a first portion of a recirculated low oxygen content gas flow and a fuel stream to form a combustible mixture and burning the mixture in a turbine combustor to produce the recirculated low oxygen content gas flow;driving a turbine, connected to a turbine shaft, using the recirculated low oxygen content gas flow;driving a turbine compressor, via the turbine shaft, which is fluidly connected to the turbine combustor; andrecirculating at least a portion of the recirculated low oxygen content gas flow from the turbine to the turbine compressor using a recirculation loop. 16. The method of operating a power plant according to claim 15, wherein electricity is generated with substantially stoichometric combustion. 17. The method of operating a power plant according to claim 15, further comprising extracting a second portion of the recirculated low oxygen content gas flow from the gas turbine assembly using a recirculated gas flow extraction unit. 18. The method of operating a power plant according to claim 15, further comprising driving a turbine generator connected to the turbine to generate electricity.
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