Patents by Inventor Toshikazu Tsumura

Toshikazu Tsumura 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).

  • Ignition burner apparatus for pulverized coal
    Patent number: 4991520
    Abstract: The present invention relates to a pulverized coal ignition burner apparatus for use with a pulverized coal boiler or the like for a thermal power plant. The apparatus is so constructed that the pulverized coal is directly burned without generation of a large amount of NOx and without using auxiliary fuel such as light oil, heavy oil and gas that are needed in the conventional apparatus. In the pulverized coal burner apparatus, an ignition region (39) in which a density of the pulverized coal of the mixture of the air and the pulverized coal supplied from a pulverized coal supply source (18) to a pulverized coal burner (4 to 9) by means of a delivery system (23, 50) is enhanced and the flow rate of the mixture flow is low is formed within the pulverized coal burner. The pulverized coal within this region is ignited by an igniter (41).
    Type: Grant
    Filed: October 5, 1989
    Date of Patent: February 12, 1991
    Assignee: Babcock-Hitachi Kabushiki Kaisha
    Inventors: Toshikazu Tsumura, Ryuichi Sugita, Yasuhide Sakaguchi, Ikuhisa Hamada, Akira Baba