Patents by Inventor Yuichiro Urakata

Yuichiro Urakata has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210139798
    Abstract: 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.
    Type: Application
    Filed: February 9, 2018
    Publication date: May 13, 2021
    Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Yuichiro Urakata, Koji Nishimura, Jun Kasai
  • Publication number: 20210002566
    Abstract: Provided is a powder fuel supply apparatus comprising a distributor (84) that branches supplied powder fuel to a plurality of branch tubes (82), a plurality of burners (126a) connected to downstream ends (82a) of the plurality of branch tubes (82), respectively, to supply char into a gasification furnace that gasifies the powder fuel, a flow nozzle (85) provided in each of the plurality of branch tubes (82), to apply pressure loss to char flow in the branch tube (82), a differential pressure gauge (86) that measures a differential pressure generated by the flow nozzle (85), 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 (86).
    Type: Application
    Filed: February 12, 2019
    Publication date: January 7, 2021
    Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Yuichiro Urakata, Koji Nishimura, Jun Kasai
  • Publication number: 20200391962
    Abstract: 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.
    Type: Application
    Filed: February 15, 2019
    Publication date: December 17, 2020
    Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Yuichiro Urakata, Jun Kasai, Koji Nishimura
  • Patent number: 10836567
    Abstract: 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.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: November 17, 2020
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Jun Kasai, Koji Nishimura, Yuichiro Urakata
  • Patent number: 10717594
    Abstract: Provided is a pressurizing system which includes: a pressurizing nozzle configured to supply a pressurizing gas into a hopper (3) where pulverized coal is accumulated; a filter configured to face a space in the hopper (3) 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 (5a), (5b) in which a pressurizing gas to be supplied to the hopper (3) is collected at a first predetermined pressure; and a pressure control means configured to start, at a time of starting pressurization of the hopper (3), 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 (5a), (5b).
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: July 21, 2020
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Yuichiro Urakata, Koji Nishimura, Naoto Nakayama, Yoshinori Koyama, Tatsuya Kameyama
  • Patent number: 10527371
    Abstract: 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.
    Type: Grant
    Filed: October 14, 2015
    Date of Patent: January 7, 2020
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Hiroyoshi Kubo, Hiromi Aota, Yoshinori Koyama, Kenichiro Kosaka, Yasunari Shibata, Yuichiro Urakata
  • Publication number: 20200001310
    Abstract: A cyclone integrated type storage device that helps to reduce equipment costs, which includes: a hollow pressure vessel; a cyclone provided in a vertically upper part of the pressure vessel and configured to swirl a produced gas introduced from outside and containing particles to thereby separate at least some of char from the produced gas, the cyclone including an opening and an exhaust port, the opening permitting discharge of the separated char vertically downward in the pressure vessel, the exhaust port permitting discharge of the produced gas to the outside of the pressure vessel; a particle storage chamber provided in a vertically lower part of the pressure vessel and storing the char discharged through the opening; and an outlet port formed in a bottom of the pressure vessel and permitting discharge of the particles stored in the particle storage chamber to the outside.
    Type: Application
    Filed: January 19, 2018
    Publication date: January 2, 2020
    Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Haruto Shinoda, Yuichiro Urakata, Yasunari Shibata, Yoshinori Koyama, Katsuhiko Yokohama
  • Publication number: 20190055485
    Abstract: 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.
    Type: Application
    Filed: January 23, 2017
    Publication date: February 21, 2019
    Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Jun Kasai, Koji Nishimura, Yuichiro Urakata
  • Publication number: 20190031430
    Abstract: Provided is a pressurizing system which includes: a pressurizing nozzle configured to supply a pressurizing gas into a hopper (3) where pulverized coal is accumulated; a filter configured to face a space in the hopper (3) 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 (5a), (5b) in which a pressurizing gas to be supplied to the hopper (3) is collected at a first predetermined pressure; and a pressure control means configured to start, at a time of starting pressurization of the hopper (3), 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 (5a), (5b).
    Type: Application
    Filed: February 6, 2017
    Publication date: January 31, 2019
    Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Yuichiro Urakata, Koji Nishimura, Naoto Nakayama, Yoshinori Koyama, Tatsuya Kameyama
  • Publication number: 20170211900
    Abstract: An anomaly monitoring device (10) is installed in an IGCC plant that experiences varying loads, and the device monitors a heat exchanger (20) that performs heat exchange between a carbon-containing fuel and a heat exchange medium flowing through a heat transfer tube (24). For each load on the IGCC plant, the anomaly monitoring device (10) calculates the average value and the standard deviation of a state quantity of the heat exchanger (20), 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 (28) of the heat transfer tube (24). Due to this configuration, the anomaly monitoring device (10) can more reliably detect an anomaly of the heat exchanger (20).
    Type: Application
    Filed: October 14, 2015
    Publication date: July 27, 2017
    Inventors: Hiroyoshi KUBO, Hiromi AOTA, Yoshinori KOYAMA, Kenichiro KOSAKA, Yasunari SHIBATA, Yuichiro URAKATA
  • Patent number: 9567904
    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.
    Type: Grant
    Filed: October 17, 2012
    Date of Patent: February 14, 2017
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Yasunari Shibata, Yuichiro Kitagawa, Kengo Shibata, Yuichiro Urakata
  • Publication number: 20160216052
    Abstract: This method of monitoring and operating a heat exchanger for fuels containing carbon has a process to calculate the Mahalanobis distance on the basis of temperatures in a plurality of locations in the direction of flow in a heat transfer face of a heat exchanger of a heat exchanger for fuels containing carbon, a process to determine the presence of an abnormality on the heat transfer face by way of the Mahalanobis distance, and a process to modify the operating conditions of a removing device.
    Type: Application
    Filed: October 14, 2014
    Publication date: July 28, 2016
    Inventors: Hiroyoshi KUBO, Hiromi AOTA, Yasunari SHIBATA, Yuichiro URAKATA
  • Patent number: 9261020
    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.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: February 16, 2016
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Hiromi Ishii, Yuichiro Kitagawa, Yasunari Shibata, Yuichiro Urakata
  • Publication number: 20140230451
    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.
    Type: Application
    Filed: October 17, 2012
    Publication date: August 21, 2014
    Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Yasunari Shibata, Yuichiro Kitagawa, Kengo Shibata, Yuichiro Urakata
  • Publication number: 20140231239
    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).
    Type: Application
    Filed: November 22, 2012
    Publication date: August 21, 2014
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Yoshinori Koyama, Yuichiro Urakata, Osamu Shinada, Yasunari Shibata, Takashi Yamamoto, Koji Nishimura, Hiromi Ishii
  • Publication number: 20120247080
    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.
    Type: Application
    Filed: March 29, 2011
    Publication date: October 4, 2012
    Inventors: Hiromi Ishii, Yuichiro Kitagawa, Yasunari Shibata, Yuichiro Urakata