Oxygen-enriched gas burner for incinerating waste materials

An oxygen-enriched gas burner comprising a burner body formed by three concentrically supported metal tubes defining therebetween a first and a second annular chamber, a frusto-conical injection nozzle formed at an inner end of said metal tubes and defining adjustabtable annular ports by axial displacement of one or more of said tubes, means to retain said injection nozzle concentrically in a circular cavity of a refractory wall of a furnace housing and for supporting said tubes outside said housing, said circular cavity having an outwardly tapered side will to form a third annular port with said inner end of an outer one of said metal tubes, spark producing means supported by said housing adjacent said injection nozzle to ignite an oxygen-gas mixture fed through said adjustable annular ports, an inner one of said metal tubes defining at the interior thereof an axial feed port, means at an outer end of said feed port to introduce under regulated pressure therein a waste material capable of being fed axially within a flame at said nozzle, independent flow adjustment means to reed under pressure a combustible gas and oxygen in said first and second chambers respectively, further adjustment means to reed air under pressure in an annular chamber communicating with said third annular port, means to axially displace said three metal tubes independently from one another to vary the size of said ports and consequently the characteristic of said flame in relation to the waste material introduced axially within the flame at a controllable flow rate whereby to incinerate said grounded waste material.