Combined cycle gas turbine system
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0657175
(2003-09-09)
|
우선권정보 |
JP-0345041 (2000-11-13) |
발명자
/ 주소 |
- Uematsu, Kazuo
- Hyakutake, Yoshinori
- Sugishita, Hideaki
|
출원인 / 주소 |
- Mitsubishi Heavy Industries, Ltd.
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
1 인용 특허 :
8 |
초록
▼
A combined cycle gas turbine system is improved to enhance a gas turbine efficiency and a combined efficiency by effecting steam-cooling of a combustor transition piece and a turbine blade. The combined cycle system has a gas turbine (8) having a generator (1), a compressor (2), a combustor (3), a b
A combined cycle gas turbine system is improved to enhance a gas turbine efficiency and a combined efficiency by effecting steam-cooling of a combustor transition piece and a turbine blade. The combined cycle system has a gas turbine (8) having a generator (1), a compressor (2), a combustor (3), a blade cooling air cooler (4) and a turbine (6), a steam turbine (29) having a high pressure turbine (21), an intermediate pressure turbine (22) and a low pressure turbine (23), and a waste heat recovery boiler (9). Saturated water of a high pressure pump (27) is partially led into a demineralizer (118) and a water sprayer (116) for cooling steam to be supplied into a moving blade (52). The steam, after being used for cooling, is recovered into a reheater (20). Outlet steam of the high pressure turbine (21) is led into a stationary blade (53) for cooling thereof and the steam is then recovered into an inlet of the intermediate pressure turbine (22). Also, steam of an intermediate pressure superheater (16) is led into a combustor transition piece (54) for cooling thereof and the steam is recovered into the inlet of the intermediate pressure turbine (22). Thus, moving blade cooling steam is reduced and the combined efficiency is enhanced.
대표청구항
▼
1. A combined cycle gas turbine system comprising; a steam turbine having a high pressure turbine, an intermediate pressure turbine and a low pressure turbine; a condenser for condensing exhaust steam of the low pressure turbine of the steam turbine; a gland steam condenser being connected to the co
1. A combined cycle gas turbine system comprising; a steam turbine having a high pressure turbine, an intermediate pressure turbine and a low pressure turbine; a condenser for condensing exhaust steam of the low pressure turbine of the steam turbine; a gland steam condenser being connected to the condenser; a gas turbine having a compressor for compressing air, a combustor for combusting fuel with the air coming from the compressor and a turbine for expanding a high temperature combustion gas coming from the combustor for driving a generator; a cooling steam system for cooling the combustor and a blade of the turbine; and a waste heat recovery boiler having components of a feed water heater, an intermediate pressure superheater, and a reheater, and being fed with exhaust gas of the gas turbine so that condensed water coming from the condenser via the gland steam condenser may be heated and vaporized via the components of the waste heat recovery boiler for supplying steam to the high pressure, intermediate pressure and low pressure turbines, respectively, wherein the cooling steam system is constructed to comprise; a moving blade cooling system having a demineralizer being connected to a downstream side of the condenser and a water sprayer being connected to the demineralizer for spraying water diverged from the condensed water into a passage for leading cooling steam from an outlet of the high pressure turbine to be supplied into a moving blade of the gas turbine; a stationary blade cooling system for leading a portion of the steam from the outlet of the high pressure turbine into a stationary blade of the gas turbine; and a combustor cooling system being fed with steam from the intermediate pressure superheater for cooling a transition piece of the combustor, and steam from the moving blade cooling system is recovered into the reheater and steam from the stationary blade cooling system and the combustor cooling system is recovered into an inlet of the intermediate pressure turbine.2. A combined cycle gas turbine system as claimed in claim 1, wherein water at an outlet of the demineralizer is heated at an economizer provided in the waste heat recovery boiler to be supplied into the water sprayer.3. A combined cycle gas turbine system as claimed in claim 2, wherein a sprayer is provided so that water diverged at an outlet of the economizer may be sprayed into the combustor cooling system.4. A combined cycle gas turbine system as claimed in claim 3, wherein a sprayer is provided so that water diverged at the outlet of the economizer may be sprayed into the stationary blade cooling system.5. A combined cycle gas turbine system as claimed in claim 1, wherein a drain separator is provided downstream of each water spraying in the moving blade cooling system, the stationary blade cooling system and the combustor cooling system.6. A combined cycle gas turbine system as claimed in claim 4, wherein a filter is provided downstream of each of the drain separators provided in the moving blade cooling system, the stationary blade cooling system and the combustor cooling system.7. A combined cycle gas turbine system as claimed in claim 2, wherein a drain separator is provided downstream of each water spraying in the moving blade cooling system, the stationary blade cooling system and the combustor cooling system.8. A combined cycle gas turbine system as claimed in claim 3, wherein a drain separator is provided downstream of each water spraying in the moving blade cooling system, the stationary blade cooling system and the combustor cooling system.9. A combined cycle gas turbine system as claimed in claim 4, wherein a drain separator is provided downstream of each water spraying in the moving blade cooling system, the stationary blade cooling system and the combustor cooling system.
이 특허에 인용된 특허 (8)
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Uematsu Kazuo,JPX ; Hirokawa Kazuharu,JPX ; Mori Hidetaka,JPX ; Sugishita Hideaki,JPX, Combined cycle power generating plant and method of supplying cooling steam for gas turbine in same.
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Kazuo Uematsu JP; Kazuharu Hirokawa JP; Hidetaka Mori JP; Hideaki Sugishita JP, Combined cycle power plant and cooling steam supply method for gas turbine therein.
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Mori Hidetaka,JPX ; Sugishita Hideaki,JPX ; Hirokawa Kazuharu,JPX ; Fukuizumi Yasushi,JPX, Combined cycle power plant with steam cooled gas turbine.
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Wakazono Osamu,JPX ; Kimura Hideo,JPX ; Fukuizumi Yasushi,JPX, Combined cycle power plant with steam-cooled gas turbine.
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Tomlinson Leroy O., Combined cycle with steam cooled gas turbine.
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Hideaki Sugishita JP; Hidetaka Mori JP; Kazuo Uematsu JP; Hideo Matsuda JP, Gas turbine combined cycle system.
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Tomlinson Leroy O., Steam attemperation circuit for a combined cycle steam cooled gas turbine.
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Sugishita Hideaki,JPX ; Aoki Sunao,JPX ; Mori Hidetaka,JPX ; Uematsu Kazuo,JPX ; Hirokawa Kazuharu,JPX, Steam cooled gas turbine system.
이 특허를 인용한 특허 (1)
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Briesch,Michael S., Combined cycle power plant with auxiliary air-cooled condenser.
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