Patents by Inventor Yuichiro Kitagawa

Yuichiro Kitagawa 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).

  • Patent number: 9731240
    Abstract: The reliability of backwashing valves constituted of first backwashing valves and second backwashing valves is ensured. A first backwashing valve (backwashing-gas rear valve) (7) that controls gas for backwashing and a second backwashing valve (backwashing-gas front valve) (6) that operates at slower speed than the first backwashing valve (7) are disposed, in a series including two or more thereof, at backwashing-gas introducing pipes individually provided for each of the filter blocks.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: August 15, 2017
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Yoshinori Koyama, Osamu Shinada, Yuichiro Kitagawa, Takao Hashimoto
  • Patent number: 9701915
    Abstract: An object is to prevent blockage of a slag hole with char and slag, enabling stable operation of a gasification furnace. In a configuration in which a heat exchanger (20) is provided above a coal gasification portion (10), the diameters (D1, D3) of the slag hole (16) and the throat portion (17) are set to three times or more the pitch (ST) of rows of heat exchange tubes (21). By doing so, blockage of the slag hole (16) or the throat portion (17) with char and a sintered material (50) falling from the heat exchanger (20) is prevented, enabling stable operation of a coal gasification furnace (101).
    Type: Grant
    Filed: January 22, 2013
    Date of Patent: July 11, 2017
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Kenta Haari, Osamu Shinada, Yasunari Shibata, Yuichiro Kitagawa
  • 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
  • Patent number: 9429043
    Abstract: A gasifier (101) including 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. 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).
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: August 30, 2016
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Kenta Haari, Yasunari Shibata, Yuichiro Kitagawa, Osamu Shinada
  • 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: 20140366504
    Abstract: An object is to prevent blockage of a slag hole with char and slag, enabling stable operation of a gasification furnace. In a configuration in which a heat exchanger (20) is provided above a coal gasification portion (10), the diameters (D1, D3) of the slag hole (16) and the throat portion (17) are set to three times or more the pitch (ST) of rows of heat exchange tubes (21). By doing so, blockage of the slag hole (16) or the throat portion (17) with char and a sintered material (50) falling from the heat exchanger (20) is prevented, enabling stable operation of a coal gasification furnace (101).
    Type: Application
    Filed: January 22, 2013
    Publication date: December 18, 2014
    Inventors: Kenta Haari, Osamu Shinada, Yasunari Shibata, Yuichiro Kitagawa
  • 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
  • Patent number: 8673066
    Abstract: In a porous filter, dust that has been collected from a gas through a filter group installed in a vessel body onto filter surfaces is removed from the filter surfaces by backwashing in which the supply and stoppage of a high-pressure gas ejected toward porous filter elements are repeated by means of a valve operation. Backwash tanks having upstream backwash valves and downstream backwash valves are installed in backwash pipes through which the high-pressure gas is guided from high-pressure-gas supply equipment to backwash nozzles for ejecting the backwash high-pressure gas toward the filter group to form a backwash high-pressure-medium supply line. The outlet pressure of the high-pressure-gas supply equipment is set to “1/critical pressure ratio” or more times a filter inlet gas pressure so that the flow speed of the high-pressure gas ejected from the backwash nozzle is the speed of sound or higher.
    Type: Grant
    Filed: July 15, 2010
    Date of Patent: March 18, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Yoshinori Koyama, Osamu Shinada, Yuichiro Kitagawa, Takashi Yamamoto
  • Publication number: 20140059982
    Abstract: The reliability of backwashing valves constituted of first backwashing valves and second backwashing valves is ensured. A first backwashing valve (backwashing-gas rear valve) (7) that controls gas for backwashing and a second backwashing valve (backwashing-gas front valve) (6) that operates at slower speed than the first backwashing valve (7) are disposed, in a series including two or more thereof, at backwashing-gas introducing pipes individually provided for each of the filter blocks.
    Type: Application
    Filed: November 6, 2013
    Publication date: March 6, 2014
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Yoshinori Koyama, Osamu Shinada, Yuichiro Kitagawa, Takao Hashimoto
  • Patent number: 8551204
    Abstract: A dust collector that collects dust (12) in gas (11) and purifies the gas (11) includes a tube plate (16) being provided in a dust collector frame (13) that separates an interior into a gas introduction chamber (14) and a gas discharge chamber (15), a plurality of dust collection pipes (17) being hung from the tube plate (16) that feeds the gas (11) from outside to inside and removes the dust (12) on a surface thereof, a gas introduction pipe (18) being provided in the gas introduction chamber (14) that includes a gas opening end portion (18a) positioned near the tube plate (16), and supplies the gas (11) to the dust collection pipes (17) in a downflow direction, a diffuser (19) being provided at the opening end portion (18a) of the gas introduction pipe (18), and a gas discharging unit (21) being provided in the gas discharge chamber (15) that discharges purified gas (20).
    Type: Grant
    Filed: November 6, 2006
    Date of Patent: October 8, 2013
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Katsuhiko Yokohama, Yuichiro Kitagawa, Masashi Kitada
  • Patent number: 8414668
    Abstract: In a coal gasification furnace adapted to feed pulverized coal thereinto by the use of inert carrier gas and gasify the same, any startup burner can be unnecessitated thereby eliminating any startup combustion chamber. Further, even in the use of a startup burner, it is smaller and lighter in weight than conventional startup burners, allowing the startup combustion chamber to be compact and limiting the height of the entirety of the gasification furnace. As a characteristic feature, a pulverized coal fuel supply passageway (23) to a combustor burner (9) is provided at its midstream portion with a startup gas supply passageway (29) for supply of a startup combustible gas (NG1).
    Type: Grant
    Filed: July 15, 2008
    Date of Patent: April 9, 2013
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Katsuhiko Yokohama, Hiromi Ishii, Yuichiro Kitagawa
  • Patent number: 8408007
    Abstract: An integrated gasification combined cycle that can adjust the balance of pressure/temperature in an overall plant and can stabilize the output of a gas turbine at an early stage during load variation, and an operation control method of the integrated gasification combined cycle are provided. When a calorific abnormality of fuel gas is detected during load variation of a gas turbine (5b), a load change command value of the gas turbine (5b) is set to zero or is decreased, and based on this load change command value, a power generation output command of the gas turbine (5b) is generated.
    Type: Grant
    Filed: November 9, 2007
    Date of Patent: April 2, 2013
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Satoru Kamohara, Takashi Sonoda, Yasuhiro Takashima, Yuichiro Kitagawa
  • Publication number: 20130036720
    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).
    Type: Application
    Filed: May 19, 2011
    Publication date: February 14, 2013
    Inventors: Kenta Haari, Yasunari Shibata, Yuichiro Kitagawa, Osamu Shinada
  • 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
  • Publication number: 20120231427
    Abstract: An apparatus displaying a job screen indicating a job procedure, has a management unit that manages a job and a plurality of processes, a monitor unit that monitors an operation of an operator, a recorder unit that records an address of a job, an instructing unit that retrieves an address in response to a notification, determines whether to update the retrieved address in response to a type of a notified operation, and stores the updated address when the retrieved address has been updated, a storage unit that stores the job screen, and a control unit that reads the job screen and controls the read job screen, wherein the management unit retrieves the updated address, and instructs the display control unit to display the job screen, and wherein the display control unit reads out the instructed job screen.
    Type: Application
    Filed: January 6, 2012
    Publication date: September 13, 2012
    Applicant: Fujitsu Limited
    Inventors: Kazuki Kitamura, Mitsutaka Kaneki, Yuichiro Kitagawa, Yasuo Hatanaka, Hiroshi Kobayashi
  • Publication number: 20120137890
    Abstract: In a porous filter, dust that has been collected from a gas through a filter group installed in a vessel body onto filter surfaces is removed from the filter surfaces by backwashing in which the supply and stoppage of a high-pressure gas ejected toward porous filter elements are repeated by means of a valve operation. Backwash tanks having upstream backwash valves and downstream backwash valves are installed in backwash pipes through which the high-pressure gas is guided from high-pressure-gas supply equipment to backwash nozzles for ejecting the backwash high-pressure gas toward the filter group to form a backwash high-pressure-medium supply line. The outlet pressure of the high-pressure-gas supply equipment is set to “1/critical pressure ratio” or more times a filter inlet gas pressure so that the flow speed of the high-pressure gas ejected from the backwash nozzle is the speed of sound or higher.
    Type: Application
    Filed: July 15, 2010
    Publication date: June 7, 2012
    Inventors: Yoshinori Koyama, Osamu Shinada, Yuichiro Kitagawa, Takashi Yamamoto
  • Publication number: 20110154788
    Abstract: The reliability of backwashing valves constituted of first backwashing valves and second backwashing valves is ensured. A first backwashing valve (backwashing-gas rear valve) (7) that controls gas for backwashing and a second backwashing valve (backwashing-gas front valve) (6) that operates at slower speed than the first backwashing valve (7) are disposed, in a series including two or more thereof, at backwashing-gas introducing pipes individually provided for each of the filter blocks.
    Type: Application
    Filed: September 8, 2009
    Publication date: June 30, 2011
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Yoshinori Koyama, Osamu Shinada, Yuichiro Kitagawa, Takao Hashimoto
  • Patent number: 7896956
    Abstract: A filter regeneration apparatus of a coal gasification system having a filter for capturing char (unburned matter) present in exhaust gas at an exhaust gas passage communicating with exhaust gas source including a coal gasification furnace, fills the filter container with inactive gas having oxygen concentration of less than 5 vol. % and heat the filter to a target temperature of 400 to 450° C. and feed ashing gas having oxygen concentration of 5 to 15 vol. %, thereby ashing char in the filter. This method and apparatus achieve ashing of char in a safe manner and shortens the time of regenerating the filter by controlling the oxygen concentration in the ashing gas and the filter temperature constantly to reach preset target values.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: March 1, 2011
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Soken Takase, Yoshinori Koyama, Osamu Shinada, Yuichiro Kitagawa, Ryouji Takahira, Kazunari Imagama
  • Patent number: 7803216
    Abstract: A compact pressurized high-temperature gas cooler having superior heat exchange performance and excellent economical efficiency is provided. A return-flow structure is formed in which a flue through which high-temperature gas flows is formed in a pressure container, a heat exchanger is disposed in the flue, and a partition dividing the internal cross-sectional area of the flue is provided so that the high-temperature gas supplied from a bottom or a top portion of the pressure container flows back in a return direction. The cross-sectional-area division ratio dividing the internal cross-section of the flue is set so that the flow rate of the high-temperature gas flowing in one direction matches that flowing in the direction opposite thereto.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: September 28, 2010
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Yoshinori Koyama, Katsuhiko Yokohama, Osamu Shinada, Hiromi Ishii, Yuichiro Kitagawa, Kosei Manabe
  • Publication number: 20100236199
    Abstract: A dust collector that collects dust (12) in gas (11) and purifies the gas (11) includes a tube plate (16) being provided in a dust collector frame (13) that separates an interior into a gas introduction chamber (14) and a gas discharge chamber (15), a plurality of dust collection pipes (17) being hung from the tube plate (16) that feeds the gas (11) from outside to inside and removes the dust (12) on a surface thereof, a gas introduction pipe (18) being provided in the gas introduction chamber (14) that includes a gas opening end portion (18a) positioned near the tube plate (16), and supplies the gas (11) to the dust collection pipes (17) in a downflow direction, a diffuser (19) being provided at the opening end portion (18a) of the gas introduction pipe (18), and a gas discharging unit (21) being provided in the gas discharge chamber (15) that discharges purified gas (20).
    Type: Application
    Filed: November 6, 2006
    Publication date: September 23, 2010
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Katsuhiko Yokohama, Yuichiro Kitagawa, Masashi Kitada