Mitsubishi Hitachi Power Systems, Ltd.

Tetsuya Kizu

Osamu Shinada

Takashi Fujii

Koichi Sakamoto

Yoshinori Koyama

Masashi Kitada

Naoshige Yoshida

Shogo Yoshida

Kenichiro Kosaka

A carbon-containing material gasification system includes: a gasifier that includes a combustion stage and a gasification stage, and generates generated gas; char providing means that separates char from the generated gas, and provides the combustion stage with the char, the combustion stage including carbon-containing material combustion means and char combustion means; and distributing ratio setting means that sets, according to a ratio of distributing material defined in Expression [1], a ratio of distributing oxidizing agent defined in Expression [2] to be smaller as the ratio of distributing material increases.(ratio of distributing material)=(providing amount of the carbon-containing material for gasification stage)/(total providing amount of the carbon-containing material to gasifier)&#x2003;&#x2003;[1](ratio of distributing oxidizing agent)=(providing amount of the oxidizing agent to oxidize carbon-containing material for the combustion stage)/(total providing amount of the oxidizing agent to the combustion stage)&#x2003;&#x2003;[2]

Carbon-containing material gasification system, and method for setting ratio of distributing oxidizing agent

Provided is an integrated coal gasification combined cycle equipped with: a gasifier that generates combustible gas from pulverized coal; a gas cooler; gas turbine equipment; an auxiliary fuel supply unit that supplies an auxiliary fuel to the gas turbine equipment; a heat recovery steam generator; steam turbine equipment; generators; and a circulation line unit that circulates cooling water. The heat recovery steam generator has a first medium-pressure coal economizer and a second medium-pressure coal economizer. When the combustible gas generated from the pulverized coal is burned, a serial heat exchange line is formed wherein cooling water passes through the first medium-pressure coal economizer, the second medium-pressure coal economizer, and the gas cooler. When the auxiliary fuel is burned, separate heat exchange lines are formed, wherein the cooling water separately passes through the first medium-pressure coal economizer and the second medium-pressure coal economizer.

Integrated gasification combined cycle and method for operating integrated gasification combined cycle

Provided is a gasifier cooling structure allowing the complexity of the furnace wall structure to be reduced to a minimum, allowing the configurability of headers and connecting pipes to be improved while maintaining as much as possible the ability to cool raw syngas. In the gasifier cooling structure, the raw syngas from a gasified carbonaceous solid fuel flows through the interior of a furnace wall formed inside a pressure vessel having a circular cross section, and the raw syngas is cooled by heat exchange with a fluid flowing inside a heat exchanger tube from a heat exchanger, whereof a plurality is provided within the furnace wall. The furnace wall has a polygonal structure wherein mutually orthogonal faces are linked by an oblique face in between, and whereof the cross sectional shape is such that the edge of the oblique face is shorter than the edges of the mutually orthogonal faces.

Gasifier cooling structure, gasifier, and gasifier annulus portion enlargement method

Growing community of inventors

Yokohama, Japan

Tetsuya Kizu