Mitsubishi Power, Ltd.

Mitsubishi Hitachi Power Systems, Ltd.

Tomoya Hayashi

Yoshinori Koyama

Naoshige Yoshida

Masato Murayama

Yasuyuki Miyata

Kentaro Nakamura

Yuji Ohta

Jun Taguchi

Kei Moriyama

Satoru Matsuo

Ken Tamura

In the present invention, a coal gasification combined power generation facility comprises: a feed water supply line (); a condensate pump () and an intermediate-pressure feed water pump (); a turbine bypass line () that bypasses a steam turbine and supplies steam to the condenser (); and a spray water line () that supplies the feed water to the turbine bypass line (). The coal gasification combined power generation facility has a normal operation mode and a bypass operation mode, and in the bypass operation mode, a control device () supplies the feed water to the turbine bypass line () and performs a first opening degree control to control the opening degree of the supply adjustment valve so that the amount of feed water supplied to the exhaust heat recovery boiler becomes less than that in the normal operation mode.

Combined power generation plant and combined power generation plant control method

A slag discharge system includes a slag bath at a bottom portion of a gasifier; a slag cooling water circulation line that discharges a mixture of slag and a slag cooling water from the slag bath; a coarse slag separator device that separates coarse slag contained in the slag cooling water; a fine slag separator device connected to the coarse slag separator device downstream side, the fine slag separator device separating fine slag; and a circulator pump connected to the fine slag separator device downstream side, the circulator pump creating a water flow in the slag cooling water circulation line; wherein the fine slag separator device includes a branch section where the slag cooling water circulation line branches into a plurality of branch lines and again joins together as one line, a fine slag filter portion, and a shutoff valve and disposed in each of the plurality of branch lines.

Slag discharge system, gasifier, and slag filtration method

A system is disclosed provided with: a slag bath that retains slag cooling water and receives slag; a slag cooling water feed line and a slag pump outlet via which the slag and the slag cooling water are pumped and fed to a slag separation device; a circulation pump that forms a water flow for pumping out the slag; a slag cooling water circulation line linking from the slag separation device to the slag bath; a reverse flow line that causes the slag cooling water dispensed from the circulation pump to flow in reverse in the slag cooling water feed line; a selective supply unit capable of selectively supplying the slag cooling water dispensed from the circulation pump to the slag cooling water circulation line and the reverse flow line; and a water supply line, one end of which is connected to the slag cooling water feed line.

Slag discharge system, gasifier provided with same, and method for operating slag discharge system

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Kanagawa, Japan

Tomoya Hayashi