Patent US387064A successfully refreshed from Google Patents.
EP0106313A2
Expired / Lapsed
EP
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Heat recovery system
Assignee: Hitachi Ltd
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Filing: 1983-10-12
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Granted: —
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Expires: 2003-10-12
Abstract
Abstract 57 A heat recovery system for taking out a mechanical energy from hot exhaust gas from a gas turbine comprises at least two exhaust-gas boiler each having drum of an interior pressure different from each other, a steam turbine, a generator driven by the steam sturbine, steam condenser and a plurality of heat exchanger. The heat exchanger is disposed in advance of the drum of the respective exhaust-gas boiler so that a feed-water circulating through the heat recovery system is preheated before entering into each drum by means of a cooling water which is used to cool blades of the gas turbine and becomes very hot.
Inventors
- 👤 Yoshiki Noguchi
- 👤 Youichi Hattori
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 20:22
CPC Classifications
F; F01; F01K; F01K27/00; F01K27/02; F01K23/00; F01K23/02; F01K23/06; F01K23/10; F01K23/106; F02; F02C; F02C6/00; F02C6/18; F02C7/00; F02C7/12; F02C7/16; Y; Y02; Y02E; Y02E20/00; Y02E20/16; Y02E20/18; Y02P; Y02P80/00; Y02P80/10; Y02P80/15
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
237 words
In a heat recovery system which is associated with an electric power plant having a compressor, a burner, a gas turbine in which stator blades thereof are cooled by a cooling medium, and a main generator driven by said gas turbine, wherein the improvement comprises: at least two exhaust gas boiler means (310, 320; 410, 420; 510, 520; 610, 620; 710, 720; 810, 820) each of which includes an economizer (311, 321; 411, 421; 511, 521; 611, 621; 711, 721; 811, 821), an evaporator (313, 323; 413, 423; 513 523; 613, 623; 713, 723; 813, 823), and a drum (312, 322; 412, 422; 512, 522; 612, 622; 712, 722; 812, 822), the interior pressure of which is different from that in the drum of other exhaust gas boiler means; a steam turbine (13); an additional generator (14) driven by said steam turbine; a condensator (15); means (16; 16a, 16b) for circulating a feed-medium condensed by said condenser throughout said heat recovery system, said feed-medium being substantially the same as said cooling medium; and a plurality of heat exchanger means (17, 19, 315, 325; 415, 425; 515, 525; 615, 625; 715, 725; 825) in which said feed-medium is adapted to be heated up by said cooling medium which is heated through said gas turbine, each of said heat exchanger means being provided in said heat recovery system in advance of said drums of the respective exhaust-gas boiler means.
Claim 2
Dependent Claim
237 words
In a heat recovery system which is associated with an electric power plant having a compressor, a burner, a gas turbine in which stator blades thereof are cooled by a cooling medium, and a main generator driven by said gas turbine, wherein the improvement comprises: at least two exhaust gas boiler means (310, 320; 410, 420; 510, 520; 610, 620; 710, 720; 810, 820) each of which includes an economizer (311, 321; 411, 421; 511, 521; 611, 621; 711, 721; 811, 821), an evaporator (313, 323; 413, 423; 513 523; 613, 623; 713, 723; 813, 823), and a drum (312, 322; 412, 422; 512, 522; 612, 622; 712, 722; 812, 822), the interior pressure of which is different from that in the drum of other exhaust gas boiler means; a steam turbine (13); an additional generator (14) driven by said steam turbine; a condensator (15); means (16; 16a, 16b) for circulating a feed-medium condensed by said condenser throughout said heat recovery system, said feed-medium being substantially the same as said cooling medium; and a plurality of heat exchanger means (17, 19, 315, 325; 415, 425; 515, 525; 615, 625; 715, 725; 825) in which said feed-medium is adapted to be heated up by said cooling medium which is heated through said gas turbine, each of said heat exchanger means being provided in said heat recovery system in advance of said drums of the respective exhaust-gas boiler means.
Claim 3
Dependent Claim
48 words
A heat recovery system as claimed in claim 1, wherein the rotor blades of said gas turbine (4) are also cooled by said cooling medium, and wherein said cooling medium for said rotor blade is used to pre-heat up said feed-medium to be delivered into said boiler means.
Claim 4
Dependent Claim
30 words
A heat recovery system as claimed in claim 1, wherein said heat exchanger means are disposed in parallel with each other along a flow of said cooling medium. (Fig. 4)
Claim 5
Dependent Claim
26 words
A heat recovery system as claimed in Claim 1, wherein said heat exchanger means are disposed in series along a flow of said cooling medium.(Fig. 5)
Claim 6
Dependent Claim
32 words
A heat recovery system as claimed in claim 1, whrein one of said heat exchanger means is disposed in advance of said economizer associated with said drum having a higher interior pressure.
Claim 7
Dependent Claim
31 words
A heat recovery system as claimed in claim 5, wherein one of said heat exchanger means is disposed in advance of said economizer associated with said drum having a lower pressure.
Claim 8
Dependent Claim
34 words
A heat recovery system as claimed in claim 1, wherein one of said heat exchanger means is disposed at an intermediate portion of said economizer associated with said drum having a higher interior pressure.
Claim 9
Dependent Claim
34 words
A heat recovery system as claimed in claim 7, wherein one of said heat exchanger means is disposed at an intermediate portion of said economizer associated with said drum having a lower interior pressure.
Claim 10
Dependent Claim
39 words
A heat recovery system as claimed in claim 1, wherein one of said heat exchanger means is disposed at a portion of said heat recovery system between said drum having a higher interior pressure and said economizer associated therewith.
Claim 11
Dependent Claim
83 words
A heat recovery system as claimed in claim 7, wherein another heat exchanger means is disposed in advance of said economizer associated with said drum having a lower interior pressure as well as in advance of said economizer associated with said drum having a higher interior pressure as viewed in the direction of flow of said feed-medium, so that not only the feed-medium directed to said lower interior pressure drum but the feed-medium directed to said higher interior pressure drum is heated up.
Claim 12
Dependent Claim
41 words
A heat recovery system as claimed in claim 2, wherein said stator blades of said gas turbine are cooled by a cooling medium branched out from an intermediate portion of said economizer associated with said drum having a lower interior pressure.
References Cited (Backward Citations)
No citation records indexed.
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