Patents by Inventor Tomohiko Miyamoto

Tomohiko Miyamoto 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: 20030168381
    Abstract: The reforming of heavy oil with supercritical water or subcritical water is accomplished by mixing together supercritical water, heavy oil, and oxidizing agent, thereby oxidizing vanadium in heavy oil with the oxidizing agent at the time of treatment with supercritical water and separate vanadium oxide. The separated vanadium oxide is removed by the scavenger after treatment with supercritical water. In this way it is possible to solve the long-standing problem with corrosion of turbine blades by vanadium which arises when heavy oil is used as gas turbine fuel.
    Type: Application
    Filed: September 18, 2002
    Publication date: September 11, 2003
    Inventors: Nobuyuki Hokari, Tomohiko Miyamoto, Hirokazu Takahashi, Hiromi Koizumi
  • Publication number: 20020122750
    Abstract: In order to prevent exhaust pipe for exhausting perfluorocompound (PFC) decomposition gas after washing from corrosion, a mist separating apparatus is provided at a rear stage of the washing tower for washing the PFC decomposition gas. The corrosion of the exhaust pipe can be prevented by removing the mist from the washed gas.
    Type: Application
    Filed: May 3, 2002
    Publication date: September 5, 2002
    Applicant: Hitachi, Ltd.
    Inventors: Shuichi Kanno, Hisao Yamashita, Tomohiko Miyamoto, Shin Tamata, Yoshiki Shibano, Takeo Komuro, Tsugihiro Yukitake, Terufumi Kawasaki
  • Patent number: 6123910
    Abstract: The present invention provides a method and an apparatus for predicting and calculating an amount of harmful oxide such as NOx contained in an exhaust gas from a reference concentration of harmful oxide, which is previously determined by a type of fuel supplied to a fluidized bed combustor, an amount of change of an air ratio and an amount of change of a gas residence time to the conditions of a specific air ratio and gas residence time in the combustor, and injecting a treatment agent such as NH.sub.3 in an amount optimum to the predicted amount into an exhaust gas. With this arrangement, an amount of harmful oxide in the exhaust gas can be securely lowered to a target value.
    Type: Grant
    Filed: December 30, 1996
    Date of Patent: September 26, 2000
    Assignees: Hitachi, Ltd., Babcock-Hitachi Kabushiki Kaisha
    Inventors: Yasuo Yoshii, Tomohiko Miyamoto, Jinichi Tomuro, Tooru Inada, Nobuyuki Hokari, Katsuya Oki
  • Patent number: 5664505
    Abstract: A method of and apparatus for detecting an abnormality of a fluidized bed boiler is characterized in that an abnormality of the fluidized bed boiler is detected on the basis of a physical quantity related to a condition change of a gas existing in a space defined by a pressure vessel and the fluidized bed boiler accommodated within the pressure vessel.
    Type: Grant
    Filed: March 15, 1995
    Date of Patent: September 9, 1997
    Assignees: Hitachi, Ltd., Babcock-Hitachi Kabushiki Kaisha
    Inventors: Tomohiko Miyamoto, Yasuo Yoshii, Tooru Inada, Jinichi Tomuro, Nobuyuki Hokari, Katsuya Oki
  • Patent number: 4884396
    Abstract: The present invention provides a desulfurizing agent comprising a porous oxide carrier, at least one of molybdenum oxide and tungsten oxide as a first component, supported on the carrier, and at least one of manganese oxide, cobalt oxide and nickel oxide as a second component, supported mainly on the surface of the first component. In a coal gasification system using the present desulfurizing agent and a power generation system using the purified gas therefrom, a reduction column for converting a portion of sulfur dioxide in the regenerated gas to hydrogen sulfide as a pretreatment means to a Claus reaction column can be eliminated when the desulfurizing agent is regenerated.
    Type: Grant
    Filed: February 16, 1988
    Date of Patent: December 5, 1989
    Assignees: Hitachi, Ltd., Babcock-Hitachi Kabushiki Kaisha
    Inventors: Tomohiko Miyamoto, Shuntaro Koyama, Jinichi Tomuro, Atsushi Morihara, Hisao Yamashita, Sadao Takahashi, Eiji Kida, Akio Ueda, Shigehito Takamoto
  • Patent number: 4806131
    Abstract: This invention relates to a gasification process for a coal gasification furnace in a coal gasification plant and to an apparatus therefor.
    Type: Grant
    Filed: April 9, 1987
    Date of Patent: February 21, 1989
    Assignee: Hitachi, Ltd.
    Inventors: Atsushi Morihara, Tomohiko Miyamoto, Shuntaro Koyama, Shunsuke Nogita, Yukio Hishinuma
  • Patent number: 4696678
    Abstract: A method for the gasification of coal in a fluidized bed gasifier to improve gasification efficiency comprising the steps of introducing coal into the thermal cracking zone of a fluidized bed gasifier, thermally cracking and partially combusting the coal in said gasifier, recovering a fluid product gas containing fine particles therein from the fluidized bed gasifier, separating the fine particles as char from the first product gas, gasifying said recovered fine char particles at a temperature higher than its melting point in a high temperature gasifier to produce ash and a second product gas having H.sub.2 and CO as its main components, recovering the ash as a slag and feeding the second product gas containing H.sub.2 and CO to the coal feeding position of the fluidized bed gasifier in the thermal cracking zone.
    Type: Grant
    Filed: October 22, 1984
    Date of Patent: September 29, 1987
    Assignee: Agency of Industrial Science and Technology
    Inventors: Shuntaro Koyama, Hiroshi Miyadera, Tomohiko Miyamoto
  • Patent number: 4531949
    Abstract: A process for gasifying coal comprising supplying to an upper portion of an entrained flow gasifier a coal powder having a particle size of 100 .mu.m or less whereby gasification is conducted at 900.degree. C. or higher in the absence of oxygen, supplying a coal powder including coarser particles and oxygen in an amount from that necessary for complete combustion of coal to a half of said amount to a lower portion of the gasifier whereby gasification is conducted at a melting point of coal ash or higher, and leading the gases produced at the lower portion of the gasifier directly to the upper portion of the gasifier, does not require recycle of char to the gasifier and gives a high gasification efficiency by passing coal powder through the gasifier only one time.
    Type: Grant
    Filed: July 25, 1983
    Date of Patent: July 30, 1985
    Assignee: Hitachi, Ltd.
    Inventors: Syuntaro Koyama, Jinichi Tomuro, Tomohiko Miyamoto, Yoshiki Noguchi, Yukio Hishinuma
  • Patent number: 4412848
    Abstract: The present invention is done on the basis of knowledge obtained from experimental results shown in FIG. 1 with respect to a heat recovery method from gasified products of hydrocarbon. The heat recovery method from gasified products of hydrocarbon of the invention is to introduce the gas containing oily matters produced by gasification of hydrocarbon into the fluidizied bed where heat is recovered by indirect heat exchange between said product gas and the cooling agent passing through the heat transfer tube arranged in the fluidized bed, in which said product gas is passed through high temperature fluidized bed kept at about 450.degree.-500.degree. C. and then through the low temperature fluidized bed kept at about 250.degree.-300.degree. C. successively and that the heat of said product gas is recovered by heat exchange in said high temperature fluidized bed and low temperature fluidized bed respectively.
    Type: Grant
    Filed: March 24, 1982
    Date of Patent: November 1, 1983
    Assignee: The Agency of Industrial Science and Technology
    Inventors: Shuntaro Koyama, Tomohiko Miyamoto, Shinji Tanaka, Hiroshi Miyadera, Sadao Takahashi
  • Patent number: 4336227
    Abstract: In a fluidized bed reactor having a reactor vessel, two detector vessels are mounted in the reactor vessel near the inside surface of the reactor vessel in the fluidized bed and in the gas outlet region. Each detector vessel contains larger detecting particles and passes the gas in the reactor vessel. Pressure drop across the detecting particles is measured. The ratio of the two pressure drops represents the ratio of the fluid velocity and minimum fluidizing velocity under the operating conditions and can be used as control factor.
    Type: Grant
    Filed: February 27, 1980
    Date of Patent: June 22, 1982
    Assignee: The Agency of Industrial Science and Technology
    Inventors: Shuntaro Koyama, Tomohiko Miyamoto, Mizuho Hirato
  • Patent number: 4294803
    Abstract: In a reactor for cracking heavy hydrocarbon oil through a fluidized bed of the particles of natural ores, coke-like materials are deposited on a top of the reactor or pipe inside surfaces of a transfer line from the reactor to a scrubber. To effectively scour out the deposited coke-like materials, particles of natural ores having a mean diameter of a few hundred .mu.m is made to be contained in an effluent gas from the top of reactor, passing through the transfer line at a concentration of 1 to 40 g/m.sup.3. The particles of natural ores have a good effect of scouring out the deposited coke-like materials and can keep the transfer line efficiently clean even with a small amount of the particles of natural ores, decreasing a pressure drop in the transfer line.
    Type: Grant
    Filed: August 21, 1979
    Date of Patent: October 13, 1981
    Assignees: Hitachi, Ltd., Nippon Mining Co., Ltd.
    Inventors: Seiichi Uchida, Yoshihito Satomi, Norihiro Kiuchi, Takeo Yamagata, Susumu Yoshioka, Tomohiko Miyamoto, Jinichi Tomuro
  • Patent number: 4220518
    Abstract: In a reactor for cracking heavy hydrocarbon oil through a fluidized bed of particles of natural ores, coke-like materials are deposited on a top of the reactor or pipe inside surfaces of a transfer line from the reactor to a scrubber. To effectively scour out the deposited coke-like materials, particles of natural ores having a mean diameter of a few hundred .mu.m is made to be contained in an effluent gas from the top of reactor, passing through the transfer line at a concentration of 1 to 40 g/m.sup.3. The particles of natural ores have a good effect of scouring out the deposited coke-like materials and can keep the transfer line efficiently clean even with a small amount of the particles of natural ores, decreasing a pressure drop in the transfer line.
    Type: Grant
    Filed: September 27, 1978
    Date of Patent: September 2, 1980
    Assignees: Hitachi, Ltd., Nippon Mining Co., Ltd.
    Inventors: Seiichi Uchida, Yoshihito Satomi, Norihiro Kiuchi, Takeo Yamagata, Susumu Yoshioka, Tomohiko Miyamoto, Jinichi Tomuro