Jgc Corporation

Michihiro Osakabe

Hideaki Tanaka

Hiroyuki Miyata

Kotaro Watanabe

Takumi Saisu

Shunsuke Mishima

Yasuo Kozaki

Tatsuo Furusako

Kazuyuki Shoumura

A combined power generation unit includes a gasification unit with a gasification furnace that is used to produce fuel gas, and a gas turbine that uses the fuel gas to generate power. To produce the fuel gas required in the combined power generation unit according to a required power load, a feed-forward control of the gasification unit is performed. Also, a dead time compensator compensates for a lag and a dead time occurring while the fuel gas is fed from the gasification unit to the combined power generation unit. The gasification unit is operated using a zero flare process. The dead time compensator delays the power load required in the combined power generation unit on the basis of the lag and the dead time of the gasification unit so that the combined power generation unit is operated while a follow-up is performed with a predetermined delay.

Integrated gasification combined cycle plant, method of controlling the plant, and method of producing fuel gas

A gasification unit provided with a gasification furnaceto produce fuel gas production is provided. A combined power generation unitwhich generates power by rotating a gas turbine and a steam turbine using fuel gas produced in the gasification unit is provided. The combined power generation unitis made operable while fuel change over between fuel gas and an auxiliary fuel as the fuel. A control system is provided in which the degree of opening of a control valvefor a flare stackprovided in a fuel gas feed line is controlled depending upon the pressure of the fuel gas from the gasification unit when fuel change over from the fuel gas to the auxiliary fuel so as to allow the fuel gas supplied to the combined power generation unitto gradually flare from a flare stackuntil a flared status that total amount of the fuel gas is reached.

Integrated gasification combined cycle and the control method

Growing community of inventors

Yokohama, Japan

Michihiro Osakabe