Burner apparatus

A burner apparatus, comprising:

• a tube having a proximal portion, a middle portion, and a distal portion, wherein the middle portion of the tube comprises at least a reduction unit;
• a fuel inlet port at the proximal portion of the tube, wherein the fuel inlet port is split into a first conduit and a second conduit, wherein the first conduit is positioned coaxially within the tube and adapted to receive fuel inside the tube, wherein the second conduit bypasses a portion of the tube;
• an air inlet port at the proximal portion of the tube, and positioned perpendicular to the fuel inlet port, wherein the air inlet port is adapted to receive air inside the tube;
• at least one air swirler unit positioned at the middle portion of the tube and mounted around the first conduit, wherein the at least one air swirler unit is configured to generate a swirling air flow and an axial air flow from the air received through the air inlet port;
• the reduction unit positioned downstream of the at least one air swirler unit along a flow of the air, wherein the reduction unit has a tapered shape along the flow of the air, wherein the reduction unit increases a speed of the air received from the at least one air swirler unit;
• at least one fuel nozzle coupled to the first conduit at the distal portion of the tube, wherein the at least one fuel nozzle defines a plurality of nozzle tips, wherein the plurality of nozzle tips discharge the fuel from the first conduit into the tube to mix with the air received from the reduction unit, wherein the air received from the reduction unit have increased speed in comparison to the air received by the reduction unit from the at least one air swirler unit;
• and
• a block positioned at the distal portion of the tube and downstream of the at least one fuel nozzle, along the flow of the air, wherein the block comprising a plurality of staged fuel tips arranged around a periphery of the block, wherein each of the plurality of staged fuel tips are configured to receive fuel from the second conduit, wherein the block is configured to discharge a primary flame by containing the fuel received from the first conduit and the swirling air flow, and provide for a secondary flame by directing the fuel received from the plurality of staged fuel tips into the primary flame downstream of a primary flame attachment point.