Patent ID: 7484478
Filing Date: 2009-02-03
Classification: F22B,F23C

Abstract:
1. Apparatus comprising a floor, wall means extending upwardly from the floor defining a peripherally enclosed radiant heating furnace section, at least one burner opening into the radiant heating furnace section through the floor, said at least one burner producing a flame and flue gases, a stack positioned in flow communication with the radiant heating furnace section to carry away the flue gases produced by the at least one burner, a set of radiant tubes positioned adjacent the wall means for receiving a hydrocarbon containing charge stock and heating said hydrocarbon-containing charge stock primarily by radiant heating, a supply of a hydrocarbon-containing charge stock connected in flow communication with the set of radiant tubes, a supply of combustible fuel and a supply of combustion-supporting gas connected in flow communication with the at least one burner, a manifold means defining a plurality of upwardly oriented openings peripherally spaced around the at least one burner at a location closely adjacent the set of radiant tubes for the introduction of gas along an inwardly facing surface of the set of radiant tubes, and a conduit means connecting the stack and the manifold means to carry flue gas from the stack to the manifold means to form a curtain of flue gas between each flame and the set of radiant tubes.