Patents by Inventor Yoshimitsu Kawanishi

Yoshimitsu Kawanishi 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).

  • Flue gas treating process and system
    Patent number: 6203598
    Abstract: This invention relates to a flue gas treating process including a heat recovery step for recovering heat from flue gas by means of a heat exchanger (4) and thereby cooling the flue gas, and a subsequent absorption step for bringing the flue gas into gas-liquid contact with an absorbing fluid (D) in absorption towers (12, 13) so as to remove at least SO2 present in the flue gas by absorption into the absorbing fluid (D), which is characterized, for example, in that a powder addition step for spraying a powder collectable in the absorption step into the flue gas is provided prior to the heat recovery step. This invention makes it possible to provide a flue gas treating process in which a countermeasure against SO3 present in flue gas can be easily achieved without resorting to ammonia injection and the flue gas can further be purified without the disadvantage of causing the injected substance to remain in the treated flue gas.
    Type: Grant
    Filed: February 8, 1999
    Date of Patent: March 20, 2001
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Shigeo Hasegawa, Naohiko Ukawa, Susumu Okino, Koichiro Iwashita, Kazuaki Kimura, Atsushi Yoshioka, Yoshimitsu Kawanishi, Shoichi Onishi, Toru Takashina, Toyoshi Nakagawa