Abstract: A burner for use in furnaces such as the type employed in steam cracking.

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.

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.

Abstract: An improved burner and a method for combusting fuel in burners used in furnaces, such as those used in steam cracking, are disclosed. The burner includes a burner tube having an upstream end and a downstream end and means for drawing flue gas from the furnace or air from a source of air or mixtures thereof in response to an inspirating effect of uncombusted fuel flowing through the burner tube from its upstream end towards its downstream end. A burner tip is mounted on the downstream end of the burner tube adjacent a first opening in the furnace, the burner tip having a plurality of main ports in an external surface thereof so that combustion of the fuel takes place downstream of the burner tip, the number and dimensions of said main ports in said external surface being such that the ratio of the total area of the main ports in said external surface is at least 1 square inch per million (MM) Btu/hr burner capacity.

Abstract: A burner for use in furnaces such as the type employed in steam cracking.