Patents Assigned to Bryan Steam Corporation
  • Flue gas recirculation system
    Patent number: 4995807
    Abstract: A system is provided for reducing the amount of nitrogen oxides produced by conventional gas-fired boilers, water heaters, or other heat transfer devices by diluting the fuel gas with an inert gas. The system includes a mixing unit or region for diluting fuel gas with an inert gas before the fuel gas is supplied to a burner assembly of a combustion device. Flue gas from the combustion chamber of the combustion device may be used to dilute the fuel gas.
    Type: Grant
    Filed: March 20, 1989
    Date of Patent: February 26, 1991
    Assignee: Bryan Steam Corporation
    Inventors: Thomas N. Rampley, Paul G. Hoffarth