A tiered burner, comprising:
- a chamber defining a hollow interior space having a circular shape and a first volume, the circular chamber having an outer wall and an inner wall, towards a central cavity;
- a plurality of vanes in a tiered arrangement, each vane of the plurality of vanes having:
- an outer edge connected to the inner wall;
- and
- an inner edge, each inner edge extending radially away from the inner wall;
- a plurality of rows of burner ports along the inner wall, each row of burner ports being underneath each inner edge, and at a greater distance from a central axis of the central cavity than the inner edge, such that flames emitted from the row of burner ports is impinged from above by the inner edge and thus directed towards a center of the central cavity, and thus each vane of the plurality of vanes is configured to be heated to become red-hot and emit infrared radiation;
- a row of outer burner ports along the outer wall;
- wherein the plurality of vanes comprises:
- a first lowermost vane having a first diameter, and wherein the inner edge of the first lowermost vane is closest to the center of the central cavity;
- a second vane above the first lowermost vane and having a second diameter, the inner edge of the second vane overhanging the outer edge of the first lowermost vane;
- a third vane above the second vane and having a third diameter, the inner edge of the third vane overhanging the outer edge of the second vane;
- a fourth uppermost vane having a fourth diameter, the inner edge of the fourth uppermost vane overhanging the outer edge of the third vane;
- an outer vane substantially aligned with the fourth uppermost vane, the outer vane extending outwards from the outer wall and over the row of outer burner ports such that flames emitted from the row of outer burner ports is impinged from above and directed away from the center of the chamber and causes a transfer of infrared radiation to the fourth uppermost vane;
- and
- wherein the fourth diameter is larger than the third diameter, the third diameter is larger than the second diameter, and the second diameter is larger than the first diameter;
- the central cavity being defined by the plurality of vanes, such that the tiered arrangement of the plurality of vanes causes the central cavity to have a conical shape;
- thereby the tiered arrangement of the plurality of vanes and staggering of the burner ports within each row of burner ports causes the flames in successive rows to avoid overlapping;
- and
- a Venturi tube in fluid communication with the hollow interior space, such that the Venturi tube delivers gas into the hollow interior space and thus through the burner ports and into the central cavity, the Venturi tube having:
- a first end connecting the Venturi tube to the chamber;
- a second end configured to receive the gas from the gas source, the second end having a shutter configured to be slidably opened to control an amount of the gas delivered to the chamber;
- a second volume smaller than the first volume;
- and
- a constriction between the first end and the second end.