Low NO.sub.x burner

  • US 5,257,927 A
  • Filed: 11/01/1991
  • Issued: 11/02/1993
  • Est. Priority Date: 11/01/1991
  • Status: Expired due to Term
First Claim
Patent Images

1. In a burner adapted to reduce emission of NOx gases upon combustion of a fuel and air, the burner including a source of combustion air and a source of combustion fuel, at least a portion of the combustion air flowing through a central air passage into which the combustion gas is supplied for combustion in a primary combustion zone, the improvement comprising:

  • a plurality of eductor nozzles radially spaced about the central air passage for supplying combustion fuel to the central air passage, said eductor nozzles mixing secondary combustion air with combustion fuel prior to flow into said primary combustion zone;

    a vane diffuser positioned within the central air passage for imparting a mix rotation on the combustion air flowing through the central air passage thereby optimizing mix of combustion gas and combustion air for combustion in the burner; and

    means for controlling the volume of flow of combustion air into the central air passage for optimum combustion and reduction of NOx emissions.

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