IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0268041
(2005-11-07)
|
등록번호 |
US-7730711
(2010-06-29)
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발명자
/ 주소 |
- Kunkle, Kevin Lee
- Backman, Steven William
- Smith, David William
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
15 |
초록
▼
A method of operating a fuel system is provided. The method includes removing fuel from at least a portion of the fuel system using a gravity drain process. The method also includes channeling nitrogen into at least a portion of the fuel system to facilitate removing air and residual fuel from at le
A method of operating a fuel system is provided. The method includes removing fuel from at least a portion of the fuel system using a gravity drain process. The method also includes channeling nitrogen into at least a portion of the fuel system to facilitate removing air and residual fuel from at least a portion of the fuel system, thereby mitigating a formation of carbonaceous precipitate particulates. The method further includes removing air and nitrogen from at least a portion of the fuel system during a fuel refilling process using a venting process, such that at least a portion of the fuel system is substantially refilled with fuel and substantially evacuated of air and nitrogen. The method also includes removing air from at least a portion of the refilled fuel system using a venting process.
대표청구항
▼
What is claimed is: 1. A nitrogen purge sub-system for a liquid fuel system for a dual fuel combustion turbine, the fuel system having at least one cavity, said nitrogen purge sub-system comprising a purge-air subsystem, a source of nitrogen coupled to a pipe in flow communication with the cavity,
What is claimed is: 1. A nitrogen purge sub-system for a liquid fuel system for a dual fuel combustion turbine, the fuel system having at least one cavity, said nitrogen purge sub-system comprising a purge-air subsystem, a source of nitrogen coupled to a pipe in flow communication with the cavity, said nitrogen purge sub-system further comprising at least one three-way valve that controls flow of nitrogen from said source to the cavity via said pipe, said at least one three-way valve having an open condition, wherein nitrogen flows from said source through said pipe and into the cavity to facilitate removal of liquid fuel and air from the cavity such that a formation of a carbonaceous precipitate particulate is mitigated, said nitrogen purge subsystem further comprising a drain valve coupled in flow communication with said at least one three-way valve; and wherein the purge-air subsystem is in flow communication with the three-way valve to facilitate removal of liquid fuel in a combustor. 2. A nitrogen purge sub-system in accordance with claim 1 wherein said at least one three-way valve is coupled to at least one sensing line and to at least one pilot air supply, said at least one three-way valve comprises at least one spring, at least one shuttle spool, and at least one flow port, such that said at least one sensing line, said at least one spring, said at least one pilot air supply, said at least one shuttle spool and said at least one flow port induce a bias, said bias being such that transport of fuel, air and nitrogen within at least a portion of the fuel system is facilitated. 3. A nitrogen purge sub-system in accordance with claim 2 wherein said at least one three-way valve further comprises at least one passage in flow communication with said pipe such that transport of fuel, air and nitrogen within at least a portion of the fuel system is facilitated. 4. A nitrogen purge sub-system in accordance with claim 1 further comprising a plurality of check valves, said plurality of check valves induce a bias, said bias being such that transport of fuel, air and nitrogen within at least a portion of the fuel system is facilitated. 5. A nitrogen purge sub-system in accordance with claim 1 further comprising: at least one nitrogen purge pipe; a nitrogen purge manifold wherein said manifold supplies nitrogen to and receives air from at least one fuel pipe via said at least one nitrogen purge pipe; and at least one pressure relief valve. 6. A nitrogen purge sub-system in accordance with claim 5 wherein said at least one nitrogen purge pipe comprises at least a portion of said nitrogen purge pipe being biased with an upward inclination with respect to a substantially horizontal plane such that air removal from at least a portion of the fuel system and transporting air to said nitrogen purge manifold is facilitated. 7. A nitrogen purge sub-system in accordance with claim 5 wherein said at least one nitrogen purge pipe comprises at least one passage in flow communication with said three-way valve such that removal of fuel from at least a portion of the fuel system is facilitated via transfer of fuel from at least a portion of the fuel system to the cavity using a motive force induced via gravity. 8. A nitrogen purge sub-system in accordance with claim 5 wherein said at least one nitrogen purge pipe further comprises at least one passage in flow communication with said three-way valve and said nitrogen source, such that removal of fuel from at least a portion of the fuel system is facilitated via inducing a motive force to bias fuel within at least a portion of the fuel system towards the cavity, the cavity comprises a first pressure, said nitrogen source comprises a second pressure, said second pressure being greater than said first pressure, and furthermore, such that removal of air from at least a portion of the fuel system is facilitated via inducing a motive force to bias air within at least a portion of the fuel system towards the cavity, the cavity comprises a third pressure, wherein air within at least a portion of the fuel system comprises a fourth pressure and said nitrogen source comprises a fifth pressure, said fifth pressure being greater than said fourth pressure, and said fourth pressure being greater than said third pressure. 9. A nitrogen purge sub-system in accordance with claim 5 wherein said at least one pressure relief valve comprises a normally closed bias and an open bias to facilitate air removal from at least a portion of the fuel system. 10. A liquid fuel system in a turbine combustor comprising a purge-air subsystem, a nitrogen purge sub-system comprising at least one valve, at least one pipe, at least one cavity, and at least one pump, said nitrogen purge sub-system further comprising a source of nitrogen coupled to said pipe in flow communication with said cavity, said nitrogen purge sub-system further comprising at least one three-way valve that controls a flow of nitrogen from said source to said cavity via said pipe, said at least one three-way valve having an open condition, wherein nitrogen flows from said source through said pipe and into said cavity to facilitate removal of liquid fuel and air from said cavity such that a formation of a carbonaceous precipitate particulate is mitigated, said nitrogen purge subsystem further comprising a drain valve coupled in flow communication with said at least one three-way valve; and wherein the purge-air subsystem is in flow communication with the three-way valve to facilitate removal of liquid fuel in the combustor. 11. A liquid fuel system in accordance with claim 10 wherein said purge air sub-system at a first pressure facilitates a fuel flow from at least a portion of said at least one pipe at a second pressure, wherein said first pressure is greater than said second pressure, said fuel flow biased toward said cavity at a third pressure, wherein said second pressure is greater than said third pressure. 12. A liquid fuel system in accordance with claim 10 wherein said at least one three-way valve is coupled to at least one sensing line and to at least one pilot air supply, said at least one three-way valve comprises at least one spring, at least one shuttle spool, and at least one flow port, such that said at least one sensing line, said at least one spring, said at least one pilot air supply, said at least one shuttle spool and said at least one flow port induce a bias, said bias being such that transport of fuel, air and nitrogen within at least a portion of said liquid fuel system is facilitated. 13. A liquid fuel system in accordance with claim 10 further comprising a plurality of check valves, said plurality of check valves induce a bias, said bias being such that transport of fuel, air and nitrogen within at least a portion of said liquid fuel system is facilitated. 14. A liquid fuel system in accordance with claim 10 further comprising at least one pressure relief valve, said at least one pressure relief valve comprises a normally closed bias and an open bias to facilitate air removal from at least a portion of said liquid fuel system.
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