Radiant wall burner

A burner for burning a combustible mixture in a furnace to produce a flame, wherein the combustible mixture comprises fuel and air, the burner comprising:

• a burner tile having an outer surface and an inner surface, the outer surface extends along a furnace wall of the furnace, and the inner surface defines a passageway extending normal to the outer surface, wherein the passageway terminates in a distal end at the outer surface;
• a fuel duct extending at least partially through the passageway and terminating in at least one fuel nozzle;
• a burner head positioned at the distal end of the passageway and forming a coanda-curved surface, wherein the nozzle directs fuel onto the coanda-curved surface such that the fuel flows along the coanda-curved surface to the outer surface of the burner tile, wherein the fuel nozzle and burner head are configured so that the fuel mixes with inert gases from the furnace during flow along the coanda-curved surface to produce a fuel-inert gas mixture prior to mixing with air from the passageway;
• and
• an air channel defined by an outside edge of the coanda-curved surface and in fluid flow communication with the passageway, wherein the air channel is configured such that the air flows from the passageway through the channel to mix with the fuel-inert gas mixture coming from the coanda-curved surface so as to produce the combustible mixture and such that the flame is produced at the outer surface of the burner tile such that flame spreads along the furnace wall surrounding the burner tile.