Patents by Inventor Katsuhiko Yokohama

Katsuhiko Yokohama 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: 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: 20190242574
    Abstract: A burner device includes a burner body which includes a protruding portion protruding from a furnace wall into an interior of a combustion furnace, a cooling pipe through which a refrigerant for cooling the burner body flows, the cooling pipe being disposed so as to surround an outer peripheral surface of the protruding portion, and a light detection unit for detecting internal light of the cooling pipe.
    Type: Application
    Filed: April 27, 2017
    Publication date: August 8, 2019
    Applicant: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Yoshinori Koyama, Katsuhiko Yokohama, Yasunari Shibata
  • Publication number: 20190086294
    Abstract: A device abnormality diagnosis method for a device to be diagnosed constituting a plant includes: obtaining time-series data of a plurality of state amounts of the plant which are correlated to an abnormality of the device to be diagnosed; a step of obtaining abnormality diagnosis data on the plurality of state amounts by performing pre-processing on at least one state amount of the plurality of state amounts to exclude, from the time-series data on the state amounts, data of the at least one state amount obtained in an exclusion period which is at least a part of a transient state period during which the device to be diagnosed is affected by a state change of another constituent device of the plant; and a step of performing abnormality diagnosis on the device to be diagnosed on the basis of the abnormality diagnosis data of the plurality of state amounts.
    Type: Application
    Filed: September 13, 2016
    Publication date: March 21, 2019
    Applicant: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Hiroyoshi Kubo, Hiromi Aota, Yasunari Shibata, Katsuhiko Yokohama, Yasunori Ishizu, Yoshinori Koyama
  • Publication number: 20190030543
    Abstract: A slag crusher includes a screen provided so as to intersect a falling direction of a slag and having openings; at least two spreaders disposed opposite from one another on the screen; and a spreader moving unit configured to support the spreaders and move the spreaders in a direction vertical to the opposing faces of the spreaders. Each spreader includes projections and a lower projection so as to face the other spreader. In a state in which the lower projection is closest to the other spreader, the lower projection does not come into surface contact with the opposed lower projection, and a distance between the opposing lower projections is smaller than an opening dimension of the openings of the screen across a width direction of the spreaders.
    Type: Application
    Filed: September 1, 2016
    Publication date: January 31, 2019
    Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Ryohei Ohashi, Katsuhiko Yokohama, Yoshinori Koyama, Yasuyuki Miyata, Yasunori Ishizu, Kengo Shibata, Masashi Kitada
  • Publication number: 20180111845
    Abstract: A water treatment device includes a primary unit having a plurality of primary elements as reverse osmosis membrane devices disposed in parallel with each other to separate water to be treated into primary condensed water and fresh water; a pump which feeds the water to be treated from the upstream side of the primary unit to the primary unit; a secondary unit having secondary elements which are provided to be fewer in number than the primary elements and separate the primary condensed water into secondary condensed water and fresh water; a sub-element which separates one of the water to be treated and the primary condensed water; and a mode switching unit which switches the sub-element between a primary mode of being used as the primary element in the primary unit and a secondary mode of being used as the secondary element in the secondary unit.
    Type: Application
    Filed: March 20, 2015
    Publication date: April 26, 2018
    Applicant: Mitsubishi Heavy Industries, Ltd.
    Inventors: Hidemasa KAKIGAMI, Yoshiaki ITO, Katsuhiko YOKOHAMA, Hideo IWAHASHI, Takayoshi HORI, Katsunori MATSUI
  • Publication number: 20180104652
    Abstract: Provided is a reverse osmosis membrane cleaning apparatus (10) which includes a membrane module (1) including a reverse osmosis membrane, a cleaning water tank (11) which stores cleaning water, a heater (13) which heats cleaning water supplied from the cleaning water tank (11) to the reverse osmosis membrane, and a temperature control device (17) which controls the heater so that a temperature of the cleaning water heated by the heater (13) is higher than 45° C. and not higher than 60° C.
    Type: Application
    Filed: April 18, 2016
    Publication date: April 19, 2018
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Yoshiaki Ito, Hidemasa Kakigami, Katsuhiko Yokohama, Masayuki Tabata, Shintaro Taura, Takayoshi Hori, Katsunori Matsui, Masanori Kawada
  • Publication number: 20180085709
    Abstract: A water treatment device (1) includes a primary unit (U1) having a plurality of primary elements (E1) as reverse osmosis membrane devices disposed in parallel to each other to separate water to be treated (SW) into primary condensed water (CW1) and fresh water (FW1); a pump (P) which feeds the water to be treated (SW) to the primary unit (U1); a secondary unit (U2) having secondary elements (E2) as reverse osmosis membrane devices, the secondary elements (E2) being provided in smaller number than the primary elements (E1) and disposed in parallel to each other to separate the primary condensed water (W1) into secondary condensed water (CW2) and fresh water (FW2); and a switching unit (2) provided only in the secondary unit (U2) among the primary unit (U1) and the secondary unit (U2) to separate at least one of the plurality of secondary elements (E2) so that treatment is disabled.
    Type: Application
    Filed: March 20, 2015
    Publication date: March 29, 2018
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Hidemasa Kakigami, Yoshiaki Ito, Katsuhiko Yokohama, Hideo Iwahashi, Takayoshi Hori, Katsunori Matsui
  • Publication number: 20180071683
    Abstract: A water treatment device (1) includes a primary unit (U1) having a plurality of primary elements (E1) as reverse osmosis membrane devices disposed in parallel to each other to separate water to be treated (SW) supplied from an upstream side into primary condensed water (CW1) and fresh water (FW1); a pump (P) which feeds the water to be treated from the upstream side of the primary unit to supply the water to be treated to the primary unit; a secondary unit (U2) having secondary elements (E2) as reverse osmosis membrane devices, the secondary elements being provided in smaller number than the primary elements and disposed in parallel to each other to separate the primary condensed water into secondary condensed water (CW2) and fresh water (FW2); and a reflux unit (2) which refluxes a part of the secondary condensed water between the primary unit and the secondary unit.
    Type: Application
    Filed: March 20, 2015
    Publication date: March 15, 2018
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Hidemasa Kakigami, Yoshiaki Ito, Katsuhiko Yokohama, Hideo Iwahashi, Takayoshi Hori, Katsunori Matsui
  • Patent number: 9890331
    Abstract: A gasification facility which uses flammable gas as a carrier medium for air-transporting powder fuel, used as a gasification raw material, to a gasification furnace and which can safely release the flammable gas, exhausted from a fuel feed hopper, to the atmosphere. In the gasification facility using flammable gas as a carrier medium for transporting pulverized coal as powder fuel from a pulverized coal feed hopper (7) to a gasification furnace (11), the flammable gas discharged from the pulverized coal feed hopper (7) is subjected to incineration treatment and then released to the atmosphere, so that safe release to the atmosphere can be implemented.
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: February 13, 2018
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Yasutaka Mizokoshi, Hiromi Ishii, Takashi Iwahashi, Katsuhiko Yokohama, Takashi Yamamoto
  • Publication number: 20180015417
    Abstract: A cleaning method for a water treatment membrane (2) provided with a primary surface (2a) for inflow of untreated water and a secondary' surface (2b) for outflow of treated water, the method including a first cleaning step of bringing a first cleaning fluid containing a metal eluent into contact with at least the primary surface and eliminating metallic scale (11) attached to the water treatment membrane, and then a second cleaning step for bringing a second cleaning fluid containing an oxidizing agent into contact with at least the primary surface and eliminating organic scale (12) attached to the water treatment membrane.
    Type: Application
    Filed: February 25, 2015
    Publication date: January 18, 2018
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Shintaro Taura, Masayuki Tabata, Yoshiaki Ito, Katsuhiko Yokohama, Toshio Sao
  • Publication number: 20170305758
    Abstract: Provided are a water treatment apparatus and a water treatment method capable of performing a significant water quality evaluation of treated water before the filtration process, and capable of rapidly responding to a change in water quality of the treated water. A water treatment apparatus of the present invention includes a treated water filtering unit which filters treated water supplied from a treated water line to become filtered water, a filtered water mixing unit which is provided in a treated water extraction line diverging from the treated water line to reduce a turbidity concentration in the treated water of the treated water extraction line to become measured water, and a water quality measuring unit which is provided at a rear stage of the filtered water mixing unit in the treated water extraction line and measures water quality of the measured water to evaluate the water quality of the treated water.
    Type: Application
    Filed: September 11, 2014
    Publication date: October 26, 2017
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Katsuhiko Yokohama, Masahiko Nagai, Masayuki Tabata, Yoshiaki Ito, Hidemasa Kakigami, Kazuhisa Takeuchi, Susumu Okino, Hiromitsu Nagayasu, Hideo Iwahashi, Katsunori Matsui, Takayoshi Hori
  • Publication number: 20170283285
    Abstract: A natural water treatment control apparatus (190) controls a treatment device configured to perform treatment used to contribute to purification of drawn natural water. The natural water treatment control apparatus (190) includes: a tide information acquiring unit (191) configured to acquire tide information serving as information associated with tides of a body of water from which the natural water is drawn; and a treatment mode determining unit (193) configured to determine a treatment mode of the treatment device on the basis of the tide information.
    Type: Application
    Filed: October 15, 2014
    Publication date: October 5, 2017
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Masayuki Tabata, Gaku Kondo, Katsunori Matsui, Takayoshi Hori, Katsuhiko Yokohama, Yoshiaki Ito, Shintaro Taura, Kazuhisa Takeuchi
  • Patent number: 9719038
    Abstract: A gasifier start-up method for a gasifier capable of preventing or inhibiting a temporary occurrence of black smoke when a gasifier is started-up. A gasifier start-up method for a gasifier, in which a gasifying agent and a solid carbonaceous fuel are supplied and gasified, includes a start-up burner igniting step of supplying a start-up fuel and oxygen-containing gas to a start-up burner and igniting the start-up fuel and oxygen-containing gas, under an inert atmosphere in which an inside of the gasifier around the start-up burner is filled with inert gas; and an oxygen-containing-gas supply adjusting step of adjusting the supply of the oxygen-containing gas such that combustion gas obtained after the combustion reaction of the start-up fuel and the oxygen-containing gas becomes the inert gas, which contains little oxygen.
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: August 1, 2017
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Shogo Yoshida, Katsuhiko Yokohama, Keisuke Matsuo
  • Patent number: 9550949
    Abstract: In a gasification apparatus, a gasification furnace (101) having an octagonal hollow cross-sectional shape, a heat exchanger (102) having a quadrangular hollow cross-sectional shape, and a connection portion (103) which connects an upper portion of the gasification furnace (101) to a lower portion of the heat exchanger (102) are provided, thereby simplifying structures and enhancing efficiencies can be achieved.
    Type: Grant
    Filed: April 12, 2013
    Date of Patent: January 24, 2017
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Katsuhiko Yokohama, Masashi Kitada, Osamu Shinada, Fumihiro Chuman
  • Patent number: 9518736
    Abstract: A water-containing solid fuel drying apparatus that can efficiently dry with low energy consumption by effectively utilizing sensible heat and latent heat of a heating medium for drying, etc. is provided.
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: December 13, 2016
    Assignees: MITSUBISHI HEAVY INDUSTRIES, LTD., THE UNIVERSITY OF TOKYO
    Inventors: Katsuhiko Yokohama, Kenichiro Kosaka, Keigo Matsumoto, Noboru Kawamoto, Yoshiki Yamaguchi, Masaaki Kinoshita, Koji Ohura, Atsushi Tsutsumi, Shozo Kaneko, Kazuhiro Mochizuki, Chihiro Fushimi, Yasuki Kansha
  • Patent number: 9487715
    Abstract: Provided is a coal gasifier enabling a reduction in size of a shift reactor by generating hydrogen-rich gasified coal gas. In a coal gasifier (G) generating gasified coal gas by a gasification reaction proceeding in a furnace fed with a gasifiable raw material, such as coal, and a gasifying agent, at least one of water and steam is fed to the furnace as a material accelerating a hydrogen-generating reaction that proceeds simultaneously with the gasification reaction.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: November 8, 2016
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Takashi Yamamoto, Katsuhiko Yokohama, Yoshinori Koyama, Katsuhiro Ota, Hiromi Ishii
  • Publication number: 20160223194
    Abstract: Provided is a burner that includes: a tubular first outer cylinder (20); a diffuser (21) disposed inside the first outer cylinder (20) and having an inner circumferential surface, a diameter of which gradually increases in a first direction; a first gas nozzle (22) configured to feed a first gas to a radial outer region of the diffuser (21) in the first direction; a second gas nozzle (23) disposed adjacent to the first gas nozzle (22) in a circumferential direction of the first outer cylinder (20) and configured to feed a second gas to the radial outer region of the diffuser (21) in the first direction; and an ignition torch (24) configured to ignite at least one of the second gas and the first gas.
    Type: Application
    Filed: July 17, 2014
    Publication date: August 4, 2016
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Katsuhiko Yokohama, Tsutomu Hamada, Kenji Atarashiya, Akiyasu Okamoto, Hiroaki Uchimura, Kenji Takeno
  • Patent number: 9388349
    Abstract: The present invention includes: a char feeding hopper body that feeds separated char toward a coal gasifier; a char communicating tube that communicates with a bottom portion of the char feeding hopper body and extends in a vertical axis direction; fluid gas feeding means that is provided at a bottom portion side of the char feeding hopper body and feeds fluid gas to an inside thereof; a radiation source section that emits ?-rays toward an inside of the char communicating tube in which a level of the char reaches a level H2 which is the same level as a level H1 of the char in the char feeding hopper as a result of feeding of the fluid gas; and a ?-ray detector that is provided along a vertical axis direction of the char communicating tube and detects the emitted ?-rays.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: July 12, 2016
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Yoshinori Koyama, Yasunari Shibata, Osamu Shinada, Katsuhiko Yokohama, Taketoshi Sakae, Koji Nishimura, Naoto Nakayama
  • Patent number: 9388348
    Abstract: A gasification apparatus that is capable of appropriately controlling a differential pressure variation between the interior of a pressure vessel and the interior of a gasification furnace, and of simplifying a structure, by providing: a pressure vessel which forms a hollow shape; a gasification furnace which forms a hollow shape, and which is positioned inside the pressure vessel with a space section therebetween; a heat exchanger positioned at the upper section of the gasification furnace; a gas nozzle which supplies seal gas to the lower section of the space section; a char-receiving section provided above the heat exchanger in the space section; a pressure equalizer of which one end communicates with the interior of the gasification furnace, and the other end opens into the char-receiving section; and a gas flow channel which passes vertically through a side section of the char-receiving section.
    Type: Grant
    Filed: October 9, 2013
    Date of Patent: July 12, 2016
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Katsuhiko Yokohama, Osamu Shinada, Masashi Kitada
  • Patent number: 9366435
    Abstract: An ignition torch that can easily be inspected regardless of the state inside a gasification furnace. The ignition torch (10) extends from an outside of a gasification furnace (1) to an inside of the gasification furnace (1) so as to receive feed of fuel and combustion air from one end positioned outside of the gasification furnace (1) and to feed flames to the other end positioned in the inside of the gasification furnace (1). An opening/closing valve (24) is provided downstream in a fuel flow direction from an ignition section (22) provided at the outside of the gasification furnace (1). A flame-holding section (28) is provided on the other end of the ignition torch (10). Supporting fuel is supplied to the flame-holding section (28).
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: June 14, 2016
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Yasuo Soda, Takashi Yamamoto, Katsuhiko Yokohama