Abstract: A method for controlling a gas turbine power plant, a gas turbine power plant, a method for controlling a carbon-containing fuel gasifier, and a carbon-containing fuel gasifier that can keep constant the amount of heat generated from a synthetic gas produced by the carbon-containing fuel gasifier. The gas turbine power plant includes a coal gasifier including a coal gasifier unit that gasifies a fuel containing carbon to produce a synthetic gas and a water-cooled wall duct disposed on the coal gasifier unit and to which a coolant, i.e., water, is directed; a gas turbine combustor that combusts the synthetic gas to produce combustion gas; a gas turbine rotated by the combustion gas produced by the gas turbine combustor; and a generator that generates electrical power. The amount of fuel fed to the coal gasifier is controlled depending on the amount of heat absorbed by the coolant directed to the water-cooled wall duct.

Abstract: In a bin system and a char recovery apparatus, reduction in size of the apparatus can be achieved. Provided are: a bin (44) that can store char; three char discharge lines (47, 49a, 49b) that are arranged at a predetermined inclination angle at which the char can be discharged in the bin (44) by means of gravitational fall; four switching lines (51a, 51b, 51c, 51d) that are arranged at the predetermined inclination angle theta at which the char stored in the bin (44) can be fed by means of the gravitational fall; and assist gas feed parts (54, 55a, 55b) as an assist device that assist flow of the char gravitationally falling down the char discharge lines (47, 49a, 49b).

Abstract: Provided is a gas cooler for cooling a produced gas on a side from which the produced gas exits, the produced gas being produced by partially oxidizing and gasifying a carbon-containing fuel in a gasification furnace inside a pressure vessel. A distance (SL) between tubes of a tube bundle of a heat exchanger provided inside the gas cooler is set such that the tubes are in contact with each other or adjacent to each other in a gas-flow direction of the produced gas. Since the tubes are in contact with each other or adjacent to each other, a particle flowing with the gas flow is only deposited as a deposited particle in a concave portion between the tubes, whereby the decrease in heat exchange efficiency caused by particle deposition can be suppressed.

Abstract: A bin system and a char recovery unit are provided with: a bin for storing char; three char discharge lines placed at the predetermined slope angle for causing the char to fall with the force of gravity so as to discharge the char into the bin; four switching lines placed at the predetermined slope angle for causing the char to fall with the force of gravity so as to feed the char stored in the bin; and assist gas feed units as assist devices for assisting the flow of the char that falls with the force of gravity through the char discharge lines. This allows for equipment downsizing.

Abstract: A gasifier (101) that has a fluid communication channel (131) that communicates a fluid, which undergoes heat exchange in the furnace, and that generates syngas by gasifying fuel; gas purifying equipment that removes impurities contained in the syngas generated by the gasifier (101); a gas turbine that is driven by the gas purified by the gas purifying equipment; and a heat exchanger that heats a fluid with exhaust expelled from the gas turbine are provided, and the fluid heated by the heat exchanger is supplied to the fluid communication channel (131) by being pressurized by pressurizing gas when performing warm-up of the gasifier (101).

Abstract: Synthesis gas (syngas) gasified in a gasification furnace to which coal is introduced burns in a combustor. An exhaust-heat recovery boiler generates steam by using exhaust gas let out from a gas turbine equipped with the combustor. The steam generated in the exhaust-heat recovery boiler is introduced to a steam turbine. A generator is driven by the steam turbine and the gas turbine to generate electrical power. Part of the exhaust gas let out from the gas turbine is introduced to a carbon-dioxide recovery unit, where carbon dioxide is recovered therefrom. Coal is carried to the gasification furnace by the carbon dioxide.

Abstract: It is possible to prevent a phenomenon by which the wall temperature of an outer cylinder rises abruptly as a layer of steam covers the inner circumferential surface of the outer cylinder and therefore decreases the heat transfer coefficient thereof, thus preventing a heat damage to the outer cylinder. Also prevented is burnout of the burner resulting from insufficient cooling due to variations in cooling efficiency at a leading end of the burner. A leading end located in a two-stage entrained-flow bed coal gasifier has a double-walled structure including an outer cylinder and an inner cylinder, and cooling water for cooling the leading end is supplied through an interior of the inner cylinder to cool the leading end and is then returned to a base end through a space formed between the outer cylinder and the inner cylinder.

Abstract: An object is to provide a gate valve capable of preventing operational deficiencies caused by particulate materials accumulating in a valve box, thus providing superior sealing properties and high durability, having a simple structure, and allowing inspection and maintenance to be performed easily.

Abstract: An object is to provide a gate valve capable of preventing operational deficiencies caused by particulate materials accumulating in a valve box, thus providing superior sealing properties and high durability, having a simple structure, and allowing inspection and maintenance to be performed easily.