Burner with low NOx emissions

Details Burner with low NOx emissions Burner with low NOx emissions

2005-04-12

2005-04-12

Basichas, Alfred (Department: 3749)

Combustion

Combustion products return structure

C431S009000, C431S005000, C126S09100A

Reexamination Certificate

active

06877980

ABSTRACT:
A burner for use in furnaces such as in steam cracking. The burner includes a primary air chamber; a burner tube having an upstream end, a downstream end and a venturi intermediate said upstream and downstream ends, said venturi including a throat portion having substantially constant internal cross-sectional dimensions such that the ratio of the length to maximum internal cross-sectional dimension of said throat portion is at least 3; a burner tip mounted on the downstream end of said burner tube adjacent a first opening in the furnace, so that combustion of the fuel takes place downstream of said burner tip; and a fuel orifice located adjacent the upstream end of said burner tube, for introducing fuel into said burner tube.

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