Patents by Inventor H. Wharton Nelson

H. Wharton Nelson 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 of decreasing ash fouling
    Patent number: 4664042
    Abstract: A furnace burns coal where the coal is decreased to a fine size to expand the surface of the carbon in the coal to a predetermined amount of free oxygen from air to militate against reduction of alkali compounds in the coal. Further, the temperature of the combustion is controlled to a predetermined maximum by recirculation of cooled flue gas to complete the control over the alkali compounds in the coal and prevent the formation of tube-fouling silicates.
    Type: Grant
    Filed: January 24, 1983
    Date of Patent: May 12, 1987
    Assignee: Combustion Engineering, Inc.
    Inventor: H. Wharton Nelson
  • Control of active alkali in black liquor
    Patent number: 4498955
    Abstract: In the cycle for production of pulp by the Kraft process, the active alkali concentration range in black liquor is monitored and adjusted. In recognition of the effect of the proportion of the active alkali to the other contents of the black liquor on a dry solids basis, active alkali is adjusted to control various performances of the evaporators and combustion within the recovery furnace.
    Type: Grant
    Filed: September 1, 1983
    Date of Patent: February 12, 1985
    Assignee: Combustion Engineering, Inc.
    Inventor: H. Wharton Nelson