Title:
OPERATING METHOD FOR SINGLE-SHAFT COMBINED CYCLE PLANT
Document Type and Number:
Japanese Patent JP3660727
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To secure steam-turbine cooling steam and gland sealing steam during operation until rises to a re-input load after the shift to shaft or plant single operation by load interruption.
SOLUTION: An exhaust heat recovery boiler 4 is constructed as a three- pressure type, the outlet of an intermediate-pressure superheater 14 is made to branch off, an auxiliary steam supply pipe 31 for supplying auxiliary steam to a shaft-assisting steam main pipe 21 is connected to this branching part to constitute a system that secures parts of gland sealing steam and steam- turbine cooling steam, and at least either of control set pressures for the pressures in high-and intermediate-pressure drums 5, 13 and for the outlet steam pressures of high-and intermediate-pressure superheaters 6, 14 is built up to a predetermined pressure to secure the cooling steam of a steam turbine 2.
Inventors:
Takeshi Kono
Naoki Mochida
Naoki Mochida
Application Number:
JP28400795A
Publication Date:
June 15, 2005
Filing Date:
October 31, 1995
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
F01K7/08; F01K9/00; F01K23/10; F01K23/16; F02C6/18; (IPC1-7): F01K23/16; F01K7/08; F01K9/00; F02C6/18
Domestic Patent References:
| JP5312008A | ||||
| JP7063010A | ||||
| JP7034810A |
Attorney, Agent or Firm:
Hisashi Hatano
Shunguchi Sekiguchi
Shunguchi Sekiguchi