Patents by Inventor John Y. H. Tsing

John Y. H. Tsing 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).

  • Control system for a boiler and method therefor
    Patent number: 4362269
    Abstract: A method and system for controlling the combustion of, for example, coal or bark in a stoker boiler or black, liquor in a recovery boiler to provide operation at maximum efficiency. Control loops are provided for primary or undergrate air and secondary or overfire air. The undergrate air control loop is adjusted as a function of carbon dioxide or steam/fuel ratio, and the overfire air control loop is adjusted as a function of carbon monoxide. In addition to carbon monoxide, combustibles and opacity may be used. Air redistribution is also used to minimize combustibles or CO or opacity.
    Type: Grant
    Filed: March 12, 1981
    Date of Patent: December 7, 1982
    Assignee: Measurex Corporation
    Inventors: Laxmi K. Rastogi, Arthur D. Allen, John Y. H. Tsing