Low NOx formation burner apparatus and methods.

摘要

Improved low NOx formation gas burner apparatus and method in which the burner apparatus includes a refractory burner tile (30) having a base portion (32) and a wall portion (34), the wall portion extending into the furnace, surrounding a central area (40) of the base portion and having external sides (43) which are slanted. Means (48) are attached to the burner tile for mixing a portion of the fuel gas with the air and discharging the resulting mixture into a primary burning zone in the furnace from within the space defined by the wall portion (34) of the burner tile. At least one secondary fuel gas nozzle (70) positioned for discharging the remaining portion of the fuel gas adjacent to an external slanted side (43) of the wall portion whereby the fuel gas mixes with flue gases and air in the furnace and burns in a secondary burning zone therein. <IMAGE>