Hitachi, Ltd.

Takashi Asao

Yoshiki Noguchi

Kiyoshi Takeuchi

Tsuguo Hashimoto

Eiji Yanai

In order to recover the heat of the waste gas from a gas turbine, a waste heat recovery boiler is provided, which has a high-pressure steam generating portion consisting of an economizer, a high-pressure steam generator and a superheater, and a low-pressure steam generating portion consisting of an economizer, and a low-pressure steam generator. The steam from the high-pressure generating portion is supplied to the turbine through a high-pressure steam pipe, and the steam from the low-pressure steam generating portion to the same through a low-pressure steam pipe. The high-pressure gland sealing steam is supplied to a high-pressure side steam gland portion the steam turbine through a high-pressure steam extracton pipe branching from the high-pressure steam pipe, a steam pressure regulator adapted to regulate the steam pressure and introduce the excess steam to a condenser, and a high-pressure gland sealing steam pipe. The low-pressure gland sealing steam is supplied to a low-pressure side steam gland portion through a low-pressure steam extraction pipe branching from the low-pressure steam pipe, a reducing valve adapted to supply steam of a constant pressure due to a depressurization operation, and a low-pressure gland sealing steam pipe.

Growing community of inventors

Hitachi, Japan

Takashi Asao