Toshiba Energy Systems & Solutions Corporation

Toshiba Plant Systems & Services Corporation

Kabushiki Kaisha Toshiba

Hiroyuki Tao

Yuichi Nakamura

Makoto Takahashi

Tsutomu Shioyama

Tsutomu Ooishi

Toshihiko Endo

Daisuke Asakura

Tetsuya Yamanaka

Koji Kanbe

Tomoo Ohfuji

Hiroki Shiraishi

Hiroyuki Nishi

Hiroryuki Nishi

Mai Ichinose

Atsuo Kinoshita

A steam turbine pipeof an embodiment includes: an upper half side main steam pipethat leads steam to a steam turbine; an upper half side main steam control valvethat intervenes in the upper half side main steam pipe; and a post-valve drain pipethat is connected to the upper half side main steam control valveand leads drain to an outside. The steam turbine pipefurther includes: a shut-off valvethat intervenes in the post-valve drain pipe; and a branching pipethat makes the post-valve drain pipeon the side closer to the upper half side main steam control valvethan is the shut-off valvecommunicate with the upper half side main steam pipebetween the upper half side main steam control valveand a high-pressure turbine

Steam turbine pipe and pipe

A start-up method of a steam turbine plant includes a first step and a second step. The first step is performed at an aeration start time. In the first step, a reheat steam pressure of an aeration boiler is set to be a reheat steam pressure required by a steam turbine or less. Besides, a reheat steam pressure of a standby boiler is set to be a reheat steam pressure required for the standby boiler or more. The second step is performed when a load of the steam turbine becomes a predetermined value. In the second step, the reheat steam pressure of the aeration boiler is increased to the same degree as the reheat steam pressure of the standby boiler. After that, steam from the aeration boiler and steam from the standby boiler are merged to be supplied to the steam turbine.

Start-up method of steam turbine plant

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Kawasaki, Japan

Hiroyuki Tao