Abstract: A burner for use in a combustion chamber of a furnace or a forehearth includes a gas delivery member for delivering a gaseous oxidant, a fuel delivery member for delivering a fuel and having a portion disposed at an interior of the gas delivery member and offset from a longitudinal axis of the gas delivery member, and a flange assembly mechanically associated with the gas and fuel delivery members, the flange assembly adapted for rotational movement to releasably secure the gas and fuel delivery members with respect to each other to provide a flame footprint at a select location in the combustion chamber.

Abstract: Part of a hydrogen sulphide containing feed gas is burnt in a furnace 6 in the presence of oxygen or oxygen-enriched air. Sulphur dioxide is formed and reacts with remaining hydrogen sulphide to form sulphur vapour which is extracted by means of a condenser 16. The resulting sulphur vapour depleted gas stream is reduced to hydrogen sulphide in a reactor 22. Water vapour is removed from the gas mixture by condensation in a quench tower 32. A part of the resulting water-depleted gas stream is recycled to the furnace 6. Another part is sent for further treatment to form a purge stream.

Abstract: Sulfur vapor is formed by partial oxidation of hydrogen sulphide. A burner is operated so as to establish a flame in a furnace in or into which the burner fires. There is supplied to the flame from the first region of the mouth of the burner at least one flow of a first combustible gas comprising hydrogen sulfide. At least one second flow of a first oxidizing gas is caused to issue from the mouth of the burner and mix in the flame with the first combustible gas. There is supplied to the flame from a second region of the mouth of the burner surrounding and spaced from the said first region at least one third flow of a second combustible gas comprising hydrogen sulfide. At least one fourth flow of a second oxidizing gas is caused to issue from a region or regions of the mouth of the burner surrounded by said second region and mix in the flame with the second combustible gas. At least one fifth, outermost flow of a third oxidizing gas is caused to mix in the flame with the second combustible gas.