Patents by Inventor Ri Koukun

Ri Koukun 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 treating perfluorocompounds
    Patent number: 7128882
    Abstract: In a PFC decomposing apparatus according to the present invention, PFC contained in a discharged gas is decomposed in catalyst cartridge 3 packed with a catalyst containing 80% Al2O3 and 20% NiO. The discharged gas containing acid gases as a decomposition gas is cooled in cooling chamber 6 and led to discharged gas washing column 13, where the acid gases are removed. Mists of acid gases (SO3 mists or NOx mists) entrained in the discharged gas are separed in cyclone 16. Compressed air at about 0.1 Mpa is fed to ejector 24 through air feed pipe 56. The interior of ejector 24 is brought into a negative pressure state by the compressed air to such the discharged gas from cyclone 16 and ejector. Ejector 24 can reduce a frequency of maintenance inspection, as compared with a blower.
    Type: Grant
    Filed: March 6, 2002
    Date of Patent: October 31, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Shin Tamata, Ri Koukun, Kazuyoshi Irie, Yoshiki Shibano, Shuichi Kanno
  • Method and apparatus for treating perfluorocompounds
    Publication number: 20020131913
    Abstract: In a PFC decomposing apparatus according to the present invention, PFC contained in a discharged gas is decomposed in catalyst cartridge 3 packed with a catalyst containing 80% Al2O3 and 20% NiO. The discharged gas containing acid gases as a decomposition gas is cooled in cooling chamber 6 and led to discharged gas washing column 13, where the acid gases are removed. Mists of acid gases (SO3 mists or NOx mists) entrained in the discharged gas are separed in cyclone 16. Compressed air at about 0.1 Mpa is fed to ejector 24 through air feed pipe 56. The interior of ejector 24 is brought into a negative pressure state by the compressed air to such the discharged gas from cyclone 16 and ejector. Ejector 24 can reduce a frequency of maintenance inspection, as compared with a blower.
    Type: Application
    Filed: March 6, 2002
    Publication date: September 19, 2002
    Applicant: Hitachi, Ltd.
    Inventors: Shin Tamata, Ri Koukun, Kazuyoshi Irie, Yoshiki Shibano, Shuichi Kanno
  • Method and apparatus for treating perfluorocompounds
    Publication number: 20020131912
    Abstract: In a PFC decomposing apparatus according to the present invention, PFC contained in a discharged gas is decomposed in catalyst cartridge 3 packed with a catalyst containing 80% Al2O3 and 20% NiO. The discharged gas containing acid gases as a decomposition gas is cooled in cooling chamber 6 and led to discharged gas washing column 13, where the acid gases are removed. Mists of acid gases (SO3 mists or NOx mists) entrained in the discharged gas are separed in cyclone 16. Compressed air at about 0.1 Mpa is fed to ejector 24 through air feed pipe 56. The interior of ejector 24 is brought into a negative pressure state by the compressed air to such the discharged gas from cyclone 16 and ejector. Ejector 24 can reduce a frequency of maintenance inspection, as compared with a blower.
    Type: Application
    Filed: August 29, 2001
    Publication date: September 19, 2002
    Inventors: Shin Tamata, Ri Koukun, Kazuyoshi Irie, Yoshiki Shibano, Shuichi Kanno