Patents by Inventor Daniel A. Hebert

Daniel A. Hebert 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 flue gas conditioning
    Patent number: 5122162
    Abstract: The volumetric flow rate for the addition of a flue gas conditioning agent, such as sulfur trioxide, is established by maintaining the derivative of the electrostatic precipitator power with respect to flow rate within a preselected operating range. The derivative of the precipitator power with respect to time and the derivative of the flow rate with respect to time are measured, and then the derivatives are divided to determine the derivative of precipitator power with respect to flow rate. This calculated value is compared with a preselected operating range. If the calculated value is greater than the preselected operating range, the flow rate of the conditioning agent is increased. If the calculated value is less than the preselected operating range, the flow rate is reduced, until a steady state calculated derivative value within the operating range is reached.
    Type: Grant
    Filed: March 19, 1990
    Date of Patent: June 16, 1992
    Assignee: Wahlco, Inc.
    Inventors: Henry V. Krigmont, Everett L. Coe, Jr., Daniel A. Hebert, Wayne R. Kozacka