Mitsubishi Heavy Industries Limited

Mitsubishi Hitachi Power Systems, Ltd.

Mitsubishi Power, Ltd.

Yuichiro Urakata

Koji Nishimura

Jun Kasai

Yasunari Shibata

Yoshinori Koyama

Yuichiro Kitagawa

Hiroyoshi Kubo

Hiromi Ishii

Tatsuya Kameyama

Naoto Nakayama

Hiromi Aota

Kenichiro Kosaka

Kengo Shibata

A powder supply hopper pressurizing apparatus including a first buffer tank in which pressurizing gas to be supplied to a powder supply hopper is accumulated at a predetermined pressure, a second buffer tank, a lower part pressure adjustment nitrogen system connected to the powder supply hopper, to supply the gas toward powder fuel stored in the powder supply hopper when supplying the powder fuel to a burner, and a control unit that controls the first buffer tank to pressurize the powder supply hopper to a first pressure and then controls the second buffer tank to pressurize the powder supply hopper to a second pressure, and where the control unit determines that one of the first buffer tank or the second buffer tank is non-usable, the control unit pressurizes the powder supply hopper by use of the first or second buffer tank that is operable, and the gas supply system.

Powder supply hopper pressurizing apparatus, gasifier unit, integrated gasification combined cycle and control method of powder supply hopper pressurizing apparatus

The object is to provide a powder fuel feed apparatus, a gasifier unit, and an integrated gasification combined cycle and a control method of a powder fuel feed apparatus that can suppress deformation of a sintered metal filter with simple and inexpensive configuration. An embodiment includes: a distributor pipe () in which a mixed gas containing moisture and a gas in which pulverized coal and nitrogen transported with the pulverized coal are mixed is transported; and a diluting nitrogen system () that, when a flow velocity of the mixed gas is less than a predetermined threshold, additionally supplies a diluting nitrogen to a mixing chamber () connected to the distributor pipe () and forming a part of the distributor pipe (), and the diluting nitrogen system () continuously supplies a predetermined flow rate of the diluting nitrogen to the mixing chamber ().

Powder fuel feed apparatus, gasifier unit, and integrated gasification combined cycle and control method of powder fuel feed apparatus

A pressurizing nozzle includes a nozzle body; a filter that is provided to be perpendicular to the central axis direction of the nozzle body so as to cover the internal cross section of the nozzle body at the leading end portion on one end of the nozzle body and that is made of sintered metal having a prescribed thickness in the central axis direction; a retainer having an annular shape that is mounted to the leading end portion of the nozzle body so as to be disassemble and that fixes the outer circumferential portion of the filter via a pair of sealing parts; and a sealing portion that is disposed along the outer circumferential end face of the filter and that seals a fluid from flowing from the outer circumferential face toward the outside in the radial direction through the filter.

Nozzle with filter, gasification combined cycle power generator, and method for disassembling filter from nozzle with filter

An object of the present invention is to provide a pulverized coal drying system for a pulverizer, a pulverized coal drying method therefor, a pulverized coal drying program, a pulverizer, and an integrated gasification combined cycle capable of stably drying a carbonaceous feedstock irrespective of the type of the carbonaceous feedstock to be used. There is provided a controller () of a pulverizer () that dries a supplied carbonaceous feedstock by using a drying fluid and includes a flow rate controller that controls the flow rate of the drying fluid within upper and lower limits of the flow rate of the drying fluid that are set to dry a plurality of types of the carbonaceous feedstock having different moisture contents in such a way that the temperature of the drying fluid discharged from the pulverizer () approaches a target temperature.

Pulverized coal drying system for pulverizer, pulverized coal drying method therefor, pulverized coal drying program, pulverizer, and integrated gasification combined cycle

Provided is a powder fuel supply apparatus comprising a distributor () that branches supplied powder fuel to a plurality of branch tubes (), a plurality of burners () connected to downstream ends () of the plurality of branch tubes (), respectively, to supply char into a gasification furnace that gasifies the powder fuel, a flow nozzle () provided in each of the plurality of branch tubes (), to apply pressure loss to char flow in the branch tube (), a differential pressure gauge () that measures a differential pressure generated by the flow nozzle (), and a control unit that determines decrease in flow velocity of the char flow based on the differential pressure obtained by the differential pressure gauge ().

Powder fuel supply apparatus, gasfier unit, integrated gasification combined cycle, and control method of powder fuel supply apparatus

A pulverized-fuel supply unit includes a hopper, first nozzles, second nozzles, a pressurizing-gas supply device, a fluidization-gas supply device, and a pulverized-fuel supply line. The hopper has a hollow to store therein pulverized fuel. The first nozzles are provided to the hopper. The second nozzles are provided to a vertically lower part of the hopper below the plurality of first nozzles. The pressurizing-gas supply device is configured to supply pressurizing gas to increase internal pressure of the hopper. The fluidization-gas supply device is configured to supply fluidization gas to fluidize the pulverized fuel in the hopper. The pulverized-fuel supply line is provided to a vertically lower part of the hopper. The pressurizing-gas supply device supplies pressurizing gas to the first nozzles and the second nozzles. The fluidization-gas supply device supplies fluidization gas to the second nozzles.

Pulverized-fuel supply unit and method, and integrated gasification combined cycle

Provided is a pressurizing system which includes: a pressurizing nozzle configured to supply a pressurizing gas into a hopper () where pulverized coal is accumulated; a filter configured to face a space in the hopper () where the pulverized coal is accumulated, and to allow the pressurizing gas to pass through the filter, the filter being provided at an end of the pressurizing nozzle; buffer tanks (), () in which a pressurizing gas to be supplied to the hopper () is collected at a first predetermined pressure; and a pressure control means configured to start, at a time of starting pressurization of the hopper (), supply of a pressurizing gas at a second predetermined pressure which is lower than the first predetermined pressure of the pressurizing gas collected in the buffer tanks (), ().

Pressurizing system for powder supply hopper, gasification facility, integrated gasification combined cycle facility, and method for pressurizing powder supply hopper

An anomaly monitoring device is installed in an integrated gasification combined cycle plant that experiences varying loads, and the device monitors a heat exchanger that performs heat exchange between a carbon-containing fuel and a heat exchange medium flowing through a heat transfer tube. For each load on the integrated gasification combined cycle plant, the anomaly monitoring device calculates the average value and the standard deviation of a state quantity of the heat exchanger, calculates the Mahalanobis distance on the basis of the average value and the standard deviation, and from the calculated Mahalanobis distance determines the presence or absence of an anomaly of the heat transfer surface of the heat transfer tube.

Heat exchanger monitoring device that determines the presence or absence of an anomaly of a heat transfer surface of a heat transfer tube

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.

Method for controlling gas turbine power plant, gas turbine power plant, method for controlling carbon-containing fuel gasifier, and carbon-containing fuel gasifier

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.

Growing community of inventors

Yokohama, Japan

Yuichiro Urakata