公开(公告)号：US11326465B2

公开(公告)日：2022-05-10

申请号：US17050204

申请日：2019-03-19

Applicant: Mitsubishi Power, Ltd.

Inventor： Daiki Fujimura

IPC: F01D11/04 ,  F01D25/12 ,  F02C6/18 ,  F02C7/224

Abstract: In a combined cycle plant and a method for operating the same, the combined cycle plant is provided with a gas turbine, a waste heat recovery boiler, and a steam turbine, and is also provided with a low-pressure gland steam line for supplying steam to a low-pressure gland portion of a low-pressure turbine, and a first heat exchanging unit which performs heat exchange between gland steam flowing through the low-pressure gland steam line, and fuel gas to be supplied to a combustor.

公开(公告)号：US11473445B2

公开(公告)日：2022-10-18

申请号：US17049371

申请日：2019-03-27

Applicant: Mitsubishi Power, Ltd.

Inventor： Daiki Fujimura ,  Susumu Sekine

IPC: F01D25/12 ,  F01D15/00 ,  F01D19/00 ,  F01K13/00 ,  F02C6/00 ,  F02C9/28 ,  F01K13/02 ,  F01K23/10 ,  F22B37/38

Abstract: A steam turbine plant is provided with: a boiler; a fuel valve; a low-temperature steam generation source; a steam turbine; a main steam line that guides steam generated in the boiler to the steam turbine; a main steam adjustment valve that is provided to the main steam line; a low-temperature steam line that guides low-temperature steam from the low-temperature generation source to a position closer to the steam turbine-side than the main steam adjustment valve in the main steam line; a low-temperature steam valve provided to the low-temperature steam line; and a control device. During a stopping process of the steam turbine plant, the control device sends a command to close the fuel valve, and then sends a command to open the low-temperature steam valve.

公开(公告)号：US11879365B2

公开(公告)日：2024-01-23

申请号：US17603472

申请日：2020-03-03

Applicant: Mitsubishi Power, Ltd.

Inventor： Daiki Fujimura ,  Susumu Sekine

IPC: F01K13/02 ,  F01K7/16 ,  F01K9/00 ,  F01K17/00

CPC classification number: F01K7/165 ,  F01K9/00 ,  F01K13/02 ,  F01K17/00

Abstract: A steam turbine plant and an operating method thereof, and a combined cycle plant and an operating method thereof, include: a turbine; steam supply lines that supply main steam to the turbine; a steam control valve and an intercept valve provided to the steam supply lines; and a first auxiliary steam supply line that supplies auxiliary steam to the turbine via the steam supply lines which are located farther downstream than the steam control valve and the intercept valve.