Patent ID: 6890498

Claim:
An apparatus which may be used as a gas burner for a Claus furnace, said apparatus comprising at least five concentric tubes and the corresponding concentric spaces between said tubes, wherein: a) the diameters of said tubes increase in a radially outward direction from the central longitudinal axis of said apparatus, such that the first tube has a smaller diameter than the fifth tube; b) the tube ends, nearest said Claus furnace, of the third, fourth, and fifth tubes lie in substantially the same plane; c) the first and second tubes are fastened together and are capable of movement, with respect to said third, fourth and fifth tubes, along said central longitudinal axis; d) the tube ends, nearest said Claus furnace, of said first and second tubes are unable to pass beyond said plane formed by said ends of said third, fourth and fifth tubes; and e) the first space, formed by said first and second tubes, terminates on the side nearest said Claus furnace, in a first injector, wherein said first injector is oriented, in the direction of gas injection into said apparatus, towards the periphery of said apparatus.