Title:
STEAM-COOLED GAS TURBINE COMBINED PLANT
Document Type and Number:
Japanese Patent JP2699808
Kind Code:
B2
Abstract:
PURPOSE: To recover cooling steam without generating pressure loss and thermal stress by using extracted steam from an intermediate stage of a high pressure steam turbine as cooling steam for high temperature cooling part of a gas turbine, and recovering the steam after cooling into a reheater of an exhaust heat recovery boiler.
CONSTITUTION: Air is compressed by an air compressor 1 and fed to a combustor 2 as high temperature and high pressure air. Fuel is burned in the combustor 2 and fed to a gas turbine 3 are a high temperature combustion gas. Further, the combustion gas is expanded in the gas turbine 3 to generate motive power so as to drive the air compressor 1 and a generator. The combustion gas discharged from the gas turbine 3 is fed to an exhaust heat recovery boiler 5. A cooling steam supply pipe 107 is connected from an intermediate stage of a high pressure steam turbine 19 to a turbine high temperature part 24 of the gas turbine 3 so as to use steam of the intermediate stage of the high pressure steam turbine 19 as gas turbine cooling steam. The cooling steam is passed through the gas turbine high temperature part 24 for heat recovery and then recovered into a middle part 300 of a reheater 16.
Inventors:
Enyajima Shinya
Shigehisa Sugita
Nobuhiro Kiyoki
Nakamura Shozo
Toshihiko Sasaki
Shinichi Hoizumi
Yoshiki Noguchi
Shigehisa Sugita
Nobuhiro Kiyoki
Nakamura Shozo
Toshihiko Sasaki
Shinichi Hoizumi
Yoshiki Noguchi
Application Number:
JP14887193A
Publication Date:
January 19, 1998
Filing Date:
June 21, 1993
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
F01K23/10; F02C3/30; F02C7/16; F22B1/18; (IPC1-7): F01K23/10; F02C3/30; F02C7/16; F22B1/18
Attorney, Agent or Firm:
Ogawa Katsuo
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