Utilization of fuel gas for purging a dormant fuel gas circuit
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F23K-005/18
F02C-007/22
F02C-007/232
출원번호
US-0484410
(2012-05-31)
등록번호
US-9103284
(2015-08-11)
발명자
/ 주소
Erickson, Dean Matthew
Brooks, Robert Lester
Byrd, Douglas Scott
Law, Joseph Robert
출원인 / 주소
General Electric Company
대리인 / 주소
Cusick, Ernest G.
인용정보
피인용 횟수 :
2인용 특허 :
9
초록▼
An approach for utilizing fuel gas to purge a dormant fuel gas circuit is disclosed. In one aspect, there is a fuel gas supply that supplies fuel to fuel gas circuits. Gas control valves, each coupled to one of the fuel gas circuits control the flow of fuel gas thereto from the fuel gas supply. A fu
An approach for utilizing fuel gas to purge a dormant fuel gas circuit is disclosed. In one aspect, there is a fuel gas supply that supplies fuel to fuel gas circuits. Gas control valves, each coupled to one of the fuel gas circuits control the flow of fuel gas thereto from the fuel gas supply. A fuel purge system selectively purges fuel gas circuits from the fuel gas circuits that are dormant with fuel gas from the fuel gas supply.
대표청구항▼
1. A system, comprising: a fuel gas supply;a plurality of fuel gas circuits;a plurality of gas control valves, each coupled to one of the plurality of fuel gas circuits that control flow of fuel gas thereto from the fuel gas supply; anda fuel purge system including: a gas purge valve for controlling
1. A system, comprising: a fuel gas supply;a plurality of fuel gas circuits;a plurality of gas control valves, each coupled to one of the plurality of fuel gas circuits that control flow of fuel gas thereto from the fuel gas supply; anda fuel purge system including: a gas purge valve for controlling an amount of fuel gas delivered to one of the plurality of fuel gas circuits, anda controller operatively connected to the gas purge valve and operable to selectively purge residual fuel gas from at least one dormant fuel gas circuit of the plurality of fuel gas circuits with fuel gas from the fuel gas supply, wherein the selective purging includes adjusting the gas purge valve to deliver a predetermined amount of fuel gas into the at least one dormant fuel gas circuit. 2. The system according to claim 1, wherein the purge system comprises a by-pass valve coupled about at least one of the plurality of gas control valves, wherein opening the by-pass valve while the at least one of the plurality of gas control valves is in a closed position enables a predetermined amount of fuel gas to flow into the at least one dormant fuel gas circuit. 3. The system according to claim 2, wherein the flow of the predetermined amount of fuel gas into the at least one dormant fuel gas circuit maintains a positive flow of fluid therein. 4. The system according to claim 2, wherein the fuel purge system further comprises a fuel gas orifice that restricts the flow of the fuel gas from the fuel gas supply into the at least one dormant fuel gas circuit. 5. The system according to claim 1, wherein the fuel purge system is further configured to selectively purge fuel gas from the at least one dormant fuel gas circuit with purge air. 6. The system according to claim 5, wherein the fuel purge system comprises an isolation valve located downstream of the at least one of the plurality of gas control valves, and a vent valve coupled between the isolation valve and the at least one of the plurality of gas control valves, wherein the isolation valve and the vent valve prevent fuel gas from mixing with the purge air supplied into a dormant fuel gas circuit. 7. The system according to claim 6, wherein the isolation valve, the at least one of the plurality of gas control valves, and the vent valve collectively form a double-block and bleed valve configuration. 8. A fuel purge system for a combustion turbine engine, comprising: a fuel gas supply;a plurality of fuel gas circuits;a plurality of gas control valves, each coupled to one of the plurality of fuel gas circuits that control flow of fuel gas thereto from the fuel gas supply; anda purge system including: a gas purge valve for controlling an amount of fuel gas delivered to one of the plurality of fuel gas circuits, anda controller operatively connected to the gas purge valve and operable to selectively purge residual fuel gas from at least one dormant fuel gas circuit of the plurality of fuel gas circuits with fuel gas from the fuel gas supply, wherein the selective purging includes adjusting the gas purge valve to deliver a predetermined amount of fuel gas into the at least one dormant fuel gas circuit and to maintain a positive pressure therein. 9. The fuel purge system according to claim 8, wherein the purge system comprises a by-pass valve coupled about at least one of the plurality of gas control valves, wherein opening the by-pass valve while the at least one of the plurality of gas control valves is in a closed position enables the predetermined amount of fuel gas to flow into the at least one dormant fuel gas circuit. 10. The fuel purge system according to claim 9, wherein the purge system further comprises a fuel gas orifice that restricts the flow of the fuel gas from the fuel gas supply into the at least one dormant fuel gas circuit. 11. The fuel purge system according to claim 8, wherein the purge system is further configured to selectively purge the at least one dormant fuel gas circuit with purge air generated from a compressor section of the combustion turbine engine. 12. The fuel purge system according to claim 11, wherein the purge system comprises an isolation valve located downstream of the at least one of the plurality of gas control valves, and a vent valve coupled between the isolation valve and the at least one of the plurality of gas control valves, wherein the isolation valve and the vent valve prevent fuel gas from mixing with the purge air supplied by the compressor section into the at least one dormant fuel gas circuit. 13. The fuel purge system according to claim 12, wherein the isolation valve, the at least one of the plurality of gas control valves, and the vent valve collectively form a double-block and bleed valve configuration. 14. A method for purging a gas turbine engine having a compressor, a combustor that receives compressed air from the compressor and fuel gas from a fuel gas supply for combustion, the fuel gas supply being in fluid communication with a plurality of fuel gas circuits that deliver fuel gas to the combustor that generates hot gases to drive a turbine, the method comprising: selectively defueling fuel gas circuits from the plurality of fuel gas circuits as the combustor transitions through combustion mode changes, wherein fuel gas circuits change from being active to being dormant in response to being defueled; andselectively purging residual fuel gas from at least one dormant fuel gas circuit of the plurality of fuel gas circuits with a predetermined amount of fuel gas from the fuel gas supply, wherein the selective purging includes adjusting a gas purge valve to deliver the predetermined amount of fuel gas from the fuel gas supply into the at least one dormant fuel gas circuit and to maintain a positive pressure through the fuel gas circuits, thereby preventing a backflow. 15. The method according to claim 14, further comprising selectively purging the at least one dormant fuel gas circuit with purge air generated from the compressor. 16. The method according to claim 15, further comprising isolating the purge air applied to the fuel gas circuits from mixing with any fuel gas. 17. The method according to claim 15, wherein the gas purge valve is operatively connected between the fuel gas supply and at least one of the plurality of fuel gas circuits.
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이 특허에 인용된 특허 (9)
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Kunkle, Kevin Lee; Backman, Steven William; Chrisfield, David John; Smith, David William, Methods and apparatus for a combustion turbine fuel recirculation system and nitrogen purge system.
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