Water recovery assembly for use in high temperature fuel cell systems
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01M-008/04
H01M-008/06
출원번호
US-0971663
(2008-01-09)
등록번호
US-8367256
(2013-02-05)
발명자
/ 주소
Jahnke, Fred C.
Daly, Joseph M.
Leo, Anthony J.
출원인 / 주소
FuelCell Energy, Inc.
인용정보
피인용 횟수 :
2인용 특허 :
10
초록▼
A water recovery assembly for use in a fuel cell system having an anode and a cathode, the anode being adapted to receive fuel and output anode exhaust, the water recovery assembly comprising a first cooling assembly adapted to receive and quench cool the anode exhaust and to recover a first portion
A water recovery assembly for use in a fuel cell system having an anode and a cathode, the anode being adapted to receive fuel and output anode exhaust, the water recovery assembly comprising a first cooling assembly adapted to receive and quench cool the anode exhaust and to recover a first portion of water including electrolyte from the anode exhaust, and to output quenched anode exhaust and the first portion of water, and a second cooling assembly adapted to receive the quenched anode exhaust and to recover a second portion of water from the quenched anode exhaust, the second portion of water being suitable for humidifying the fuel supplied to the anode.
대표청구항▼
1. A water recovery assembly for use in a molten carbonate fuel cell system having an anode and a cathode, said anode is adapted to receive fuel and to output anode exhaust, said water recovery assembly comprising: a first cooling assembly receiving and quench cooling said anode exhaust to recover a
1. A water recovery assembly for use in a molten carbonate fuel cell system having an anode and a cathode, said anode is adapted to receive fuel and to output anode exhaust, said water recovery assembly comprising: a first cooling assembly receiving and quench cooling said anode exhaust to recover a first portion of water including electrolyte from said anode exhaust and to output quenched electrolyte-free anode exhaust and electrolyte-containing water including said first portion of water, said first cooling assembly comprising:a quench assembly including a downward facing path passing said anode exhaust therethrough, and one or more spray water units injecting predetermined amount of spray water into the downward facing path for quench cooling said anode exhaust and condensing said first portion of water from said anode exhaust, anda recycling assembly comprising a blowdown assembly discharging a portion of the electrolyte-containing water outputted from said quench assembly to remove electrolyte and a recycle path recycling remaining water outputted from said quench assembly to said quench assembly for use as spray water; anda second cooling assembly comprising a packed tower which receives said quenched anode exhaust from the first cooling assembly and recovers a second portion of water from said quenched anode exhaust, said second portion of water being substantially free of electrolyte and suitable for humidifying said fuel supplied to said anode;wherein the water recovery assembly is part of the molten carbonate fuel cell system. 2. A water recovery assembly in accordance with claim 1, wherein said packed tower is adapted to receive said quenched anode exhaust at a first end and to receive recycled water at a second end, wherein said quenched anode exhaust flows from said first end toward said second end and said recycled water flows from said second end toward said first end. 3. A water recovery assembly in accordance with claim 2, wherein said first end is a lowermost end of said packed tower and said second end is an upper most end of said packed tower. 4. A water recovery assembly in accordance with claim 3, wherein separated water comprising said second portion of water recovered from said quenched anode exhaust and said recycled water are collected at or close to said first end of said packed tower and outputted from said packed tower. 5. A water recovery assembly in accordance with claim 4, wherein said fuel cell system includes a humidifier assembly for humidifying said fuel supplied to said anode, and wherein all or a portion of said separated water is outputted from said packed tower to said humidifier assembly for humidifying said fuel. 6. A water recovery assembly in accordance with claim 4, wherein said recycle path passes a predetermined portion of said separated water outputted from said packed tower to said second end of said packed tower for use as said recycled water. 7. A water recovery assembly in accordance with claim 6, wherein said recycle path includes a heat exchanger for further cooling said predetermined portion of said separated water before passing said separated water to said packed tower. 8. A water recovery assembly in accordance with claim 1, further comprising a heat exchanger upstream from said first cooling assembly for recovering heat from said anode exhaust before passing said anode exhaust to said first cooling assembly. 9. A water recovery assembly in accordance with claim 2, wherein said packed tower outputs separated anode exhaust from said second end after recovering said second portion of water from said anode exhaust. 10. A water recovery assembly in accordance with claim 4, wherein a portion of said separated water is outputted from said packed tower to said recycle path of said first cooling assembly for mixing with said first portion of water. 11. A molten carbonate fuel cell system comprising: at least one molten carbonate fuel cell including an anode for receiving fuel and outputting anode exhaust and a cathode for receiving oxidant gas and outputting cathode exhaust;a humidifier assembly for humidifying said fuel supplied to said anode; anda water recovery assembly comprising:a first cooling assembly for receiving and quench cooling said anode exhaust to recover a first portion of water including electrolyte from said anode exhaust and to output electrolyte-free quenched anode exhaust and electrolyte-containing water including said first portion of water, said first cooling assembly comprising:a quench assembly including a downward facing path passing said anode exhaust therethrough, and one or more spray water units injecting predetermined amount of spray water into the downward facing path for quench cooling said anode exhaust and condensing said first portion of water from said anode exhaust, anda recycling assembly comprising a blowdown assembly discharging a portion of the electrolyte-containing water outputted from said quench assembly to remove electrolyte and a recycle path recycling remaining water outputted from said quench assembly to said quench assembly for use as spray water, anda second cooling assembly comprising a packed tower which receives said quenched anode exhaust from the first cooling assembly and recovers a second portion of water from said quenched anode exhaust, the second portion of water being substantially free of electrolyte, and outputs at least a portion of said second portion of water to said humidifier for humidifying said fuel supplied to said anode. 12. A molten carbonate fuel cell system in accordance with claim 11, wherein said packed tower is adapted to receive said quenched anode exhaust at a first end and to receive recycled water at a second end, wherein said quenched anode exhaust flows from said first end toward said second end and said recycled water flows from said second end toward said first end. 13. A molten carbonate fuel cell system in accordance with claim 12, wherein said first end is a lowermost end of said packed tower and said second end is an uppermost end of said packed tower. 14. A molten carbonate fuel cell system in accordance with claim 13, wherein separated water comprising said second portion of water recovered from said quenched anode exhaust and said recycled water is collected at or close to said first end of said packed tower and outputted from said packed tower. 15. A molten carbonate fuel cell system in accordance with claim 14, wherein said recycle path is adapted to receive a first predetermined portion of said separated water outputted from said packed tower and to provide said predetermined portion of said separated water to said second end of said packed tower for use as the recycled water, and wherein a second predetermined portion of said separated water is outputted to said humidifier. 16. A molten carbonate fuel cell system in accordance with claim 15, wherein said recycle path includes a heat exchanger for further cooling said first predetermined portion of said separated water before providing said separated water to said packed tower. 17. A molten carbonate fuel cell system in accordance with claim 11, wherein said water recovery assembly further comprises a heat exchanger upstream from said first cooling assembly for recovering heat from said anode exhaust before passing said anode exhaust to said first cooling assembly. 18. A molten carbonate fuel cell system in accordance with claim 13, wherein said packed tower outputs separated anode exhaust from said second end after recovering said second portion of water from said anode exhaust, and said fuel cell system further comprises an oxidizer adapted to receive said separated anode exhaust from said packed tower and oxidant gas. 19. A molten carbonate fuel cell system in accordance with claim 18, further comprising a heat exchanger for pre-heating said oxidant gas using said cathode exhaust before supplying said oxidant gas to said oxidizer. 20. A molten carbonate fuel cell system in accordance with claim 14, wherein a portion of said separated water is outputted from said packed tower to said recycle path of said first cooling assembly for mixing with said first portion of water. 21. A method of recovering water from anode exhaust outputted by an anode of a fuel cell comprising: receiving anode exhaust from said anode in a first cooling assembly;quench cooling and recovering a first portion of water including electrolyte from said anode exhaust in said first cooling assembly and outputting quenched electrolyte-free anode exhaust and electrolyte-containing water including said first portion of water, wherein said recovering said first portion of water from said anode exhaust comprises passing the anode exhaust through a downward facing path and injecting a predetermined amount of spray water to said anode exhaust in said downward facing path to condense said first portion of water from said anode exhaust;discharging a portion of the electrolyte-containing water outputted in said recovering step to remove said electrolyte and recycling remaining water outputted from said first cooling assembly for use as spray water in said first cooling assembly;receiving said quenched anode exhaust from the first cooling assembly in a second cooling assembly comprising a packed tower; andrecovering a second portion of water from said quenched anode exhaust by conveying the quenched anode exhaust through the packed tower, said second portion of water being substantially free of electrolyte and suitable for humidifying fuel supplied to said anode,wherein the method of recovering water from anode exhaust is performed in a molten carbonate fuel cell system. 22. A method of recovering water from anode exhaust in accordance with claim 21, wherein said recovering said second portion of water comprises passing said quenched anode exhaust from a first end of said packed tower to a second end of said packed tower and passing recycled water from said second end of said packed tower to said first end of said packed tower. 23. A method of recovering water from anode exhaust in accordance with claim 22, wherein said recovering said second portion of water further comprises collecting separated water including said second portion of water from said quenched anode exhaust and said recycled water at or close to said first end of said packed tower and outputting said separated water from said packed tower. 24. A method of recovering water from anode exhaust in accordance with claim 23, further comprising providing at least a portion of said separated water outputted from said packed tower to a humidifier assembly for humidifying said fuel. 25. A method of recovering water from anode exhaust in accordance with claim 23, further comprising recycling a predetermined portion of said separated water outputted by said packed tower to said second end of said packed tower for use as said recycled water. 26. A method of recovering water from anode exhaust in accordance with claim 23, further comprising outputting a portion of said separated water from said packed tower to said recycle path of said first cooling assembly for mixing with said first portion of water.
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이 특허에 인용된 특허 (10)
Sederquist Richard A., Apparatus for humidifying the air stream of a fuel cell power plant.
Ferrall,Joseph Francis; Fengler,Wolfgang Alan; Powers,James Daniel; Sokolov,Pavel Alexandrovich, High temperature protection of hybrid fuel cell system combustor and other components VIA water or water vapor injection.
Cargnelli,Joseph; Simpson,Todd A.; Del Core,Robert C.; Burany,Stephen; Ye,Jianming; Bazzarella,Ricardo, System and method for management of gas and water in fuel cell system.
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