Patent ID: 9562682
Date: 2017-02-07
CPC Classifications: F23C,F23D,F23L,F23N,F27D,Y02E,Y02T

Claim:
1. A burner providing reduced NO x emissions comprising: a burner wall having a forward end; at least one first fuel gas nozzle positioned longitudinally rearward of and laterally outward from the forward end of the burner wall; at least one fuel gas delivery port positioned in the first fuel gas nozzle to deliver fuel gas in a flow path outside of the burner wall to a combustion zone at the forward end of the burner wall; at least one exterior ledge provided on the burner wall and positioned between the fuel gas delivery port and the forward end of the burner wall such that at least a portion of the fuel gas traveling in the flow path will contact the exterior ledge, the exterior ledge being spaced apart from the forward end; and a perforated flame holder including: wherein the burner wall and the at least one first fuel gas nozzle are configured to preheat the perforated flame holder to a threshold temperature by supporting a first combustion reaction in the combustion zone; and further comprising at least one second fuel gas nozzle configured to output fuel gas onto the perforated flame holder after the perforated flame holder has been heated to the threshold temperature; and further comprising a control circuit operatively coupled to the at least one first fuel gas nozzle and the at least one second fuel gas nozzle; wherein the control circuit is configured to: