| 摘要 |
<p>An improved burner for combusting fuel in burners used in furnaces such as those found in steam cracking. The burner includes: a burner tube (12) having a longitudinal axis and having a downstream end (18) and an upstream end (16) for receiving fuel and air, flue gas or mixtures thereof; a fuel orifice (11) located adjacent the upstream end of said burner tube, for introducing fuel into said burner tube; a burner tip (20) mounted on the downstream end of said burner tube and adjacent a first opening in the furnace, said burner tip having a plurality of main ports substantially aligned with said longitudinal axis of the burner tube, and a plurality of peripherally arranged side ports; and a peripheral tile (22) which peripherally surrounds said burner tip, said peripheral tile providing at least one gap between an outer periphery of said burner tip and said peripheral tile, said at least one gap effective for providing a portion of the air for combustion wherein the quantity of fuel discharged during combustion from said peripherally arranged side ports does not exceed 15% of the total fuel gas combusted.</p> |
