Flame stabilizing/no.sub.x reduction device for pulverized coal burner

Abstract From the Canadian patent

A combustion method and burner nozzle system having a DeNOx Stabilizer concentrically secured within a burner nozzle such that the fuel stream is separated into an outer fuel-rich stream and an inner fuel-lean stream. The outer fuel-rich stream passes around the exterior of the DeNOx Stabilizer where its flow area is increased thereby decreasing its velocity before it is discharged from the burner nozzle. Concurrently the inner fuel-lean stream passes through the DeNOx Stabilizer where its flow area is reduced thereby increasing its velocity before this stream is discharged from the burner nozzle central to the slower fuel-rich stream. Mixing members interior of the burner nozzle further …