Patents by Inventor Ryouji Takahira

Ryouji Takahira 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 for regenerating filter and apparatus thereof
    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
  • Method for regenerating filter and apparatus thereof
    Publication number: 20080127824
    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: Application
    Filed: November 30, 2006
    Publication date: June 5, 2008
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Soken Takase, Yoshinori Koyama, Osamu Shinada, Yuichiro Kitagawa, Ryouji Takahira, Kazunari Imagama