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Title:
STEAM COOLING GAS TURBINE
Document Type and Number:
Japanese Patent JP3389019
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To effectively utilize steam on a bottoming side, and stabilize a system all through starting, operating and stopping, by arranging a path to steam-cool the wall surface of a combustor by being branched from a cooling steam supply line or a recovering line, which forms a path to steam cool a rotor blade or a stator blade.
SOLUTION: The exhaust gas main stream of a high pressure turbine 21 is branched from an exhaust gas line 51 introducing to a reheater 32, and supplied as the cooling steam of the rotor blade, the stator blade and so on of a gas turbine 41, to the other exhaust gas line 52. While this exhaust gas line 52 is also branched in the middle and the cooling steam line 53 of the stator blade out of lines assigns the exhaust gas of the high pressure turbine 21 to cool the stator blade, the other branched cooling steam line 54 lowers the temperature itself by heating fuel by the holding heat of the cooling steam in a fuel heating device 58, and after that, cooling steam is introduced to the cooling steam line 55 of the rotor blade and the cooling steam line 56 in the wall surface of a combustor, then respective cooling parts are cooled. After that, cooling steam is collected in a recovering line 57, and returned as recovering steam in the intermediate position of a reheater 32.


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Inventors:
Kazuo Uematsu
Hideaki Sugishita
Application Number:
JP20574296A
Publication Date:
March 24, 2003
Filing Date:
August 05, 1996
Export Citation:
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Assignee:
MITSUBISHI HEAVY INDUSTRIES,LTD.
International Classes:
F01D5/18; F01D9/02; F01D25/12; F01K23/10; F02C6/18; F02C7/18; F23R3/42; (IPC1-7): F02C7/18; F01D5/18; F01D9/02; F01D25/12; F23R3/42
Domestic Patent References:
JP5141267A
JP6146924A
JP6323163A
JP6173616A
JP2283803A
JP74210A
JP496311A
Attorney, Agent or Firm:
Arata Ishikawa



 
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