Patents by Inventor Yoshitaka Iizuka

Yoshitaka Iizuka 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).

  • Method and apparatus for producing a fertilizer from gas containing sulfur oxides
    Publication number: 20020088261
    Abstract: The present invention relates to a method and an apparatus for producing a fertilizer by injecting ammonia into and applying electron beam to gas containing sulfur oxides. Gas containing sulfur oxides is cooled by a heat exchanger (2) and a cooling tower (3), and thereafter introduced into a process vessel (4) in which ammonia is injected into the gas and the gas is irradiated with electron beam. The product of the ratio of the concentration of ammonia to the concentration of water in the gas prior to irradiation of the electron beam and the ratio of the concentration of ammonia to the concentration of water in the gas after irradiation of the electron beam is controlled to be of a predetermined value.
    Type: Application
    Filed: August 29, 2001
    Publication date: July 11, 2002
    Applicant: EBARA CORPORATION
    Inventors: Masahiro Izutsu, Akiko Yokoyama, Yoshitaka Iizuka, Ryoji Suzuki
  • Desulfurizing method and apparatus by irradiation of electron beam
    Patent number: 6416722
    Abstract: A high temperature gas containing sulfur oxides is desulfurized by converting sulfur oxides to ammonium compounds by the injection of ammonia and irradiation with an electron beam. The high temperature gas containing the sulfur oxides is cooled by contacting the gas with recirculated cooling water, then mixed with ammonia, air, and water and irradiated with an electron beam.
    Type: Grant
    Filed: June 15, 2000
    Date of Patent: July 9, 2002
    Assignee: Ebara Corporation
    Inventors: Masahiro Izutsu, Yoshitaka Iizuka
  • Method for producing a fertilizer from gas containing sulfur oxides
    Patent number: 6355084
    Abstract: The present invention relates to a method and an apparatus for producing a fertilizer by injecting ammonia into and applying electron beam to gas containing sulfur oxides. Gas containing sulfur oxides is cooled by a heat exchanger (2) and a cooling tower (3), and thereafter introduced into a process vessel (4) in which ammonia is injected into the gas and the gas is irradiated with electron beam. The product of the ratio of the concentration of ammonia to the concentration of water in the gas prior to irradiation of the electron beam and the ratio of the concentration of ammonia to the concentration of water in the gas after irradiation of the electron beam is controlled to be of a predetermined value.
    Type: Grant
    Filed: July 13, 1999
    Date of Patent: March 12, 2002
    Assignee: Ebara Corporation
    Inventors: Masahiro Izutsu, Akiko Yokoyama, Yoshitaka Iizuka, Ryoji Suzuki
  • Method and apparatus for treating gas by irradiation of electron beam
    Patent number: 6179968
    Abstract: A method and apparatus for treating gas by irradiation with an electron beam. Flue gas discharged from a fuel combustion facility is treated with an electron beam to remove sulfur oxides and/or nitrogen oxides. Ammonia is added to the flue gas and the mixed gas is irradiated with an electron beam in a process vessel. A dust collector receives the gas and collects a by-product mainly composed of ammonium sulfate and/or ammonium nitrate which is produced by the reaction in the process vessel. A gas-contacting portion extending from the process vessel to the dust collector is cooled either wholly or partly, to a dew point of the gas or below.
    Type: Grant
    Filed: January 20, 1999
    Date of Patent: January 30, 2001
    Assignee: Ebara Corporation
    Inventors: Masahiro Izutsu, Yoshitaka Iizuka, Kazuaki Hayashi
  • Desulfurizing method and apparatus by irradiation of electron beam
    Patent number: 6093288
    Abstract: A high temperature gas containing sulfur oxides is desulfurized by converting sulfur oxides to ammonium compounds by the injection of ammonia and irradiation with an electron beam. The high temperature gas containing the sulfur oxides is cooled by contacting the gas with recirculated cooling water, then mixed with ammonia, air, and water and irradiated with an electron beam.
    Type: Grant
    Filed: August 27, 1998
    Date of Patent: July 25, 2000
    Assignee: Ebara Corporation
    Inventors: Masahiro Izutsu, Yoshitaka Iizuka