Energy efficient low NO x burner and method of operating same

Details Energy efficient low NO x burner and method of operating same Energy efficient low NO x burner and method of operating same

2005-02-25

2008-09-09

Basichas, Alfred (Department: 3749)

Combustion

Combustion products return structure

Recirculation about mixing or combustion chamber wall or baffle

C431S009000, C431S278000, C431S284000, C431S285000

Reexamination Certificate

active

07422427

ABSTRACT:
A burner for installation in a furnace having a combustion chamber defined by at least a furnace front wall, two side walls, a top wall and a bottom wall as well as heat transfer pipes through which a heat transfer medium flows and which are arranged on at least one of the top, bottom and side walls. A burner assembly is mounted to the furnace front wall and has a tubular member with an open distal end that is located inside the combustion chamber. The other end of the tubular member is attached to the furnace front wall. Several combustion air ports extend into the tubular member from the other, proximal end thereof and are coupled to a source of combustion air. Several fuel gas discharge nozzles also extend into the tubular member from the other end thereof and are coupled to a fuel source. Furnace gas openings formed in the tubular member are spaced apart from the distal end, are arranged about the tubular member's periphery, and are located relative to the combustion chamber so that furnace gases circulate past some of the heat transfer pipes before they reach the furnace gas openings to thereby form a mixture of combustion air, fuel gas and furnace gas. A spinner at the distal end of the tubular member creates a recirculation zone for the mixture downstream of the spinner and the tubular member.

REFERENCES:
patent: 4575332 (1986-03-01), Oppenberg et al.
patent: 5299930 (1994-04-01), Weidman
patent: 5460512 (1995-10-01), Lifshits et al.

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