Coaxial dual supersonic speed oxygen flow coherent oxygen lance

A coaxial dual supersonic oxygen flow cluster oxygen lance, characterized by comprising:

• an inner layer circular-hole supersonic nozzle assembly, an outer layer water-cooled casting assembly, and a middle layer annular-hole supersonic nozzle assembly arranged between the inner layer circular-hole supersonic nozzle assembly and the outer layer water-cooled casting assembly, wherein the circular-hole supersonic assembly generates a first beam of supersonic oxygen jets and the annular-hole supersonic assembly generates a second beam of supersonic oxygen jets surrounding the first beam of supersonic oxygen jets;
• and the second beam of supersonic oxygen jets and the first beam of supersonic oxygen jets are in the same direction, and the two beams of supersonic oxygen jets are independently supplied with gas and are independently adjusted;
• the inner layer circular-hole supersonic nozzle assembly comprises a Lavalle spray head and a first oxygen supply pipe welded with the Lavalle spray head, wherein the first oxygen supply pipe forms a first oxygen channel, and an inner profile surface of the Lavalle spray head forms a supersonic spout which is used for generating the first beam of supersonic oxygen jets;
• the middle layer annular-hole supersonic nozzle assembly comprises an annular-hole spray head and a second oxygen supply pipe welded with the annular-hole spray head;
• the second oxygen supply pipe is coaxially sleeved on a periphery of the first oxygen supply pipe to form a second oxygen channel, the Lavalle spray head is inserted in the annular-hole spray head, an upper cavity of a circular ring cone gradually reducing a cross sectional area and a lower cavity of the circular ring cone gradually expanding a cross sectional area are formed between an inner profile of the annular-hole spray head and an outer profile of the Lavalle spray head in an airflow direction, the upper cone cavity and the lower cone cavity with variable cross sectional areas are connected by a plurality of independent oxygen slotted holes with equal cross sectional area, the plurality of independent oxygen slotted holes are uniformly distributed circumferentially about an axis of an upper cone and a lower cone, and the upper cavity of the circular ring cone, the oxygen slotted holes and the lower cavity of the circular ring cone form a supersonic spout of the annular-hole spray head, which is used for generating a second beam of supersonic oxygen jets.