Patents by Inventor Toshie Kataoka

Toshie Kataoka 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).

  • Nitrogen oxide removal control apparatus
    Patent number: 5855111
    Abstract: A power generation plant possessing a gas turbine includes a nitrogen oxide removal apparatus for injecting a reducing material such as ammonia into exhaust gas from the gas turbine to reduce NOx emission under a predetermined level. To a feedback control system for estimating such an amount of the reducing material to be injected that a measured NOx amount at an outlet of the nitrogen oxide removal apparatus will get toward a NOx setpoint there is added a feedback control system for estimating an injection amount of the reducing material required for a NOx flow rate at an inlet of the nitrogen oxide removal apparatus based upon a mole ratio of the reducing material to the NOx. The measured NOx at the inlet of the nitrogen oxide removal apparatus is corrected based upon the combustion conditions of the gas turbine unit. NOx setpoint and the mole ratio are estimated based upon the operating conditions of a plant related to nitrogen oxide removal efficiency.
    Type: Grant
    Filed: September 11, 1996
    Date of Patent: January 5, 1999
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Engineering Co.
    Inventors: Haruo Oguchi, Shirou Hino, Toshie Kataoka
  • Nitrogen oxide removal control apparatus
    Patent number: 5813212
    Abstract: A power generation plant possessing a gas turbine includes a nitrogen oxide removal apparatus for injecting a reducing material such as ammonia into exhaust gas from the gas turbine to reduce NOx emission under a predetermined level. To a feedback control system for estimating such an amount of the reducing material to be injected that a measured NOx amount at an outlet of the nitrogen oxide removal apparatus will get toward a NOx setpoint there is added a feedback control system for estimating an injection amount of the reducing material required for a NOx flow rate at an inlet of the nitrogen oxide removal apparatus based upon a mole ratio of the reducing material to the NOx. The measured NOx at the inlet of the nitrogen oxide removal apparatus is corrected based upon the combustion conditions of the gas turbine unit. NOx setpoint and the mole ratio are estimated based upon the operating conditions of a plant related to nitrogen oxide removal efficiency.
    Type: Grant
    Filed: September 22, 1997
    Date of Patent: September 29, 1998
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Engineering Co.
    Inventors: Haruo Oguchi, Shirou Hino, Toshie Kataoka
  • Nitrogen oxide removal control apparatus
    Patent number: 5584172
    Abstract: A power generation plant possessing a gas turbine includes a nitrogen oxide removal apparatus for injecting a reducing material such as ammonia into exhaust gas from the gas turbine to reduce NOx emission under a predetermined level. To a feedback control system for estimating such an amount of the reducing material to be injected that a measured NOx amount at an outlet of the nitrogen oxide removal apparatus will get toward a NOx setpoint there is added a feedback control system for estimating an injection amount of the reducing material required for a NOx flow rate at an inlet of the nitrogen oxide removal apparatus based upon a mole ratio of the reducing material to the NOx. The measured NOx at the inlet of the nitrogen oxide removal apparatus is corrected based upon the combustion conditions of the gas turbine unit. NOx setpoint and the mole ratio are estimated based upon the operating conditions of a plant related to nitrogen oxide removal efficiency.
    Type: Grant
    Filed: December 23, 1994
    Date of Patent: December 17, 1996
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Engineering Co.
    Inventors: Haruo Oguchi, Shirou Hino, Toshie Kataoka