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Exhaust recirculating method and apparatus for a hydrocarbon fired burner

  • US 20050089811A1
  • Filed: 10/24/2003
  • Published: 04/28/2005
  • Est. Priority Date: 10/24/2003
  • Status: Abandoned Application
First Claim
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1. A system for a hydrocarbon fired burner comprising:

  • an exhaust conduit in fluid communication with the burner;

    a recirculation conduit configured to provide, fluid communication between the exhaust conduit and burner inlet;

    an adjustable valve configured to selectively permit the recirculation conduit to provide fluid communication between the exhaust conduit and the burner inlet;

    a NOx sensor located in the exhaust conduit;

    a system controller operably connected to the NOx sensor and configured to monitor an amount of NOx emissions in the exhaust conduit, the system controller also operably connected to the valve to adjust the valve; and

    a burner controller operably connected to the system controller, wherein the system controller sends a signal to the burner controller to shut down the burner when the NOx emissions in the exhaust conduit are at a first unacceptable level.

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