Patent ID: 8002951

Claim:
A furnace for the cracking of hydrocarbons, comprising: (a) a radiant firebox, said radiant firebox comprising a furnace floor having a centerline; (b) a plurality of decoke effluent injection nozzles mounted along or adjacent to said centerline for injecting decoke effluent upward into said radiant firebox; (c) a plurality of burners arranged to form a first line of burners and a second line of burners, each line of burners positioned on opposing sides of said plurality of decoke effluent injection nozzles; (d) a first plane of radiant coils spaced at a distance greater than the distance that said first line of burners is spaced from said centerline of said furnace floor and on the same side of said centerline as said first row of burners; and (e) a second plane of radiant coils spaced at a distance greater than the distance that said second line of burners is spaced from said centerline of said furnace floor and on the same side of said centerline as said second row of burners.