Systems and methods for power generation with carbon dioxide isolation
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02C-007/08
F02G-001/00
F02G-003/00
출원번호
UP-0557250
(2006-11-07)
등록번호
US-7739864
(2010-07-12)
발명자
/ 주소
Finkenrath, Matthias
Bartlett, Michael
출원인 / 주소
General Electric Company
대리인 / 주소
Patnode, Patrick K.
인용정보
피인용 횟수 :
70인용 특허 :
12
초록▼
A power generation system includes first and second turbines. The first turbine including a low-pressure compressor (14) and a high-pressure compressor (16). A combustion chamber (22) combusts compressed oxidant and a fuel stream to generate a hot flue gas (31). The first turbine further includes a
A power generation system includes first and second turbines. The first turbine including a low-pressure compressor (14) and a high-pressure compressor (16). A combustion chamber (22) combusts compressed oxidant and a fuel stream to generate a hot flue gas (31). The first turbine further includes a high-pressure expander (20) for receiving the flue gas and generating a CO2 rich exhaust gas. A low-pressure expander (22) generates a first final exhaust (52) and electrical energy. A CO2 separation system receives exhaust gas (38) and provides a CO2 lean gas fed to low-pressure expander (22). The second turbine including a compressor section (64) configured to discharge a recycle stream (71) from a high pressure compressor (70) to a second combustion chamber (72) and supply a split stream (84) from a low-pressure compressor (68) to high pressure compressor (16) of the first turbine.
대표청구항▼
The invention claimed is: 1. A power generation system comprising: a first turbine system comprising: a first compressor section comprising at least two stages, said at least two stages comprising a first low pressure compressor fluidly coupled to a first high pressure compressor configured to supp
The invention claimed is: 1. A power generation system comprising: a first turbine system comprising: a first compressor section comprising at least two stages, said at least two stages comprising a first low pressure compressor fluidly coupled to a first high pressure compressor configured to supply a first portion of compressed oxidant and a second portion of compressed oxidant; a first combustion chamber configured to combust said first portion of compressed oxidant and a first fuel stream comprising carbon-based fuels and to generate a first hot flue gas; a first expander section having an inlet for receiving said first hot flue gas comprising at least two stages, said at least two stages comprising a first high pressure expander configured to generate a first expanded exhaust gas rich in CO2, said first high pressure expander fluidly coupled to a first low pressure expander configured to generate a first exhaust and electrical energy; and a CO2 separation system fluidly coupled to the high pressure expander for receiving said first expanded exhaust gas from said first high pressure expander and provide a CO2 lean gas that is then fed to said first low-pressure expander; and a second turbine system comprising: a second compressor section comprising at least two stages, said at least two stages comprising a second low pressure compressor fluidly coupled to a second high pressure compressor, wherein said high pressure compressor is configured to receive said second portion of compressed oxidant; a second combustion chamber configured to combust a second fuel stream comprising carbon-based fuels and to generate a second hot flue gas; and a second expander section configured to receive said second hot flue gas, and to generate a second final exhaust and electrical energy; wherein said second compressor section is configured to receive said second final exhaust comprising carbon dioxide and to discharge a recycle stream from said second high pressure compressor to said second combustion chamber and a split stream from said second low pressure compressor to said first high pressure compressor. 2. The system of claim 1, wherein said CO2 separation system comprises a heat exchanger configured to recover heat from said first expanded exhaust gas and generate a cooled first expanded exhaust gas and a carbon dioxide separator configured to receive said cooled carbon dioxide rich stream and generate a carbon dioxide lean stream. 3. The system of claim 2, wherein said heat exchanger comprises a cross-exchanger configured to recover heat from said first expanded exhaust gas in exchange with said carbon dioxide lean stream from said carbon dioxide separator. 4. The system of claim 2, wherein said carbon dioxide separator comprises a membrane unit. 5. The system of claim 1, wherein said first and second fuels comprise natural gas. 6. The system of claim 1, further comprising a first heat recovery steam generator configured to recover heat from said first final exhaust and generate a first portion of steam and a second heat recovery steam generator configured to recover heat from said second final exhaust and generate a second portion of steam. 7. The system of claim 1 further comprising at least one intercooler. 8. The system of claim 7, wherein said at least one intercooler comprises a common intercooler disposed in between said first compressor section and said second compressor section and is fluidly coupled to said first and second low pressure compressors and said first and second high pressure compressors. 9. The system of claim 7, wherein said at least one intercooler comprises a first intercooler disposed between said first low pressure compressor and first high pressure compressor and a second intercooler disposed between said second low pressure compressor and said second high pressure compressor. 10. The system in claim 9, wherein said split stream is taken out from the outlet of said second intercooler. 11. The system of claim 1, wherein said first final exhaust is substantially free of CO2. 12. The system of claim 1, wherein said oxidant is air. 13. The system of claim 1, wherein said second expander section comprises at least two stages, said at least two stages comprising a second high pressure expander configured to generate a second expanded exhaust gas, said second high pressure expander fluidly coupled to a second low pressure expander configured to generate said second final exhaust and electrical energy. 14. A power generation system comprising: a first turbine system comprising: a first compressor section comprising at least two stages, said at least two stages comprising a first low pressure compressor fluidly coupled to a first high pressure compressor, said first low pressure compressor configured to supply a first portion of compressed oxidant and said high pressure compressor is configured to supply a first compressed mixed stream; a first combustion chamber configured to combust a first fuel stream comprising carbon-based fuels and said first compressed mixed stream and to generate a first hot flue gas; and a first expander section having an inlet for receiving said first hot flue gas comprising at least two stages, said at least two stages comprising a first high pressure expander, said first high pressure expander fluidly coupled to a first low pressure expander configured to generate a first final exhaust and electrical energy; and a second turbine system comprising: a second compressor section comprising at least two stages, said at least two stages comprising a second low pressure compressor fluidly coupled to a second high pressure compressor, wherein said low pressure compressor is configured to generate a split stream and said high pressure compressor is configured to generate a second mixed stream; a second combustion chamber configured to combust said second mixed stream and a second fuel stream comprising carbon-based fuels and to generate a second hot flue gas; and a second expander section configured to receive said second hot flue gas and to generate a second final exhaust and electrical energy; and a CO2 separation system fluidly coupled to said first and second compressor sections, said CO2 separation system configured to receive said split stream and generate a CO2 lean stream; wherein said second compressor section is configured to receive said second final exhaust comprising carbon dioxide and to discharge said second mixed stream from said high pressure compressor to said second combustion chamber. 15. The system of claim 13, wherein said CO2 separation system comprises a carbon dioxide separator configured to receive said split stream and generate said carbon dioxide lean stream. 16. The system of claim 15, wherein the carbon dioxide separator comprises a membrane unit. 17. The system of claim 15, wherein said first and second fuels comprise natural gas. 18. The system of claim 15 further comprising a first intercooler disposed between said first low pressure compressor and first high pressure compressor and a second intercooler disposed between said second low pressure compressor and said second high pressure compressor. 19. The system in claim 18, wherein said split stream is taken out from the outlet of said second intercooler. 20. The system of claim 15, wherein said first final exhaust is substantially free of CO2. 21. The system of claim 15, wherein said oxidant is air. 22. A method for generating power comprising: compressing an oxidant in a compressor section to produce a first portion and a second portion of compressed oxidant; combusting a first fuel and said first portion of compressed oxidant to produce a hot flue gas; expanding said hot flue gas in an expander section and generating electrical energy wherein said expander section is configured to receive said hot flue gas comprising at least two stages, the at least two stages comprising a high pressure expander configured to generate a first expanded exhaust gas rich in CO2, said high pressure expander fluidly coupled to a low pressure expander configured to generate a first final exhaust and said electrical energy; separating CO2 from said first expanded exhaust gas in a CO2 separator and introducing a CO2 lean gas to said low pressure expander; compressing said second portion of compressed oxidant in a compressor section comprising at least two stages, said at least two stages comprising a second low pressure compressor fluidly coupled to a second high pressure compressor, wherein said high pressure compressor is configured to receive said second portion of compressed oxidant; combusting a second fuel stream and a recycle stream comprising carbon-based fuels and generating a second hot flue gas; and expanding said second hot flue gas and generating a second final exhaust and electrical energy; wherein said second compressor section is configured to receive said second final exhaust comprising carbon dioxide and to discharge said recycle stream from said second high pressure compressor and a split stream from said second low pressure compressor to said first high pressure compressor.
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이 특허에 인용된 특허 (12)
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