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US 10,760,784 B2Granted
Burner including a perforated flame holder spaced away from a fuel nozzle
AssigneeClearsign Technologies Corporation
InventorsDouglas W. Karkow, Joseph Colannino, Igor A. Krichtafovitch, Robert E. Breidenthal, Christopher A. Wiklof
Life of this patent
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Abstract
A perforated flame holder and burner including a perforated flame holder provides reduced oxides of nitrogen (NOx) during operation. The perforated flame holder includes a pattern of elongated apertures extending between a proximal and a distal surface of the flame holder relative to a fuel nozzle. The perforated flame holder can provide a significantly reduced flame height while maintaining heat output from the burner.
Claims44
A burner, comprising:
- a fuel nozzle configured to output a fuel stream, wherein the fuel nozzle is one of a plurality of fuel nozzles, incuding a primary fuel nozzle and a secondary fuel nozzle;
- a flame holder disposed away from the fuel nozzle and having a proximal side and a distal side disposed toward and away from the fuel nozzle, respectively, the flame holder further having a plurality of elongated apertures extending through the flame holder from the proximal side of the flame holder to the distal side of the flame holder, the flame holder being configured to support a flame in the plurality of elongated apertures between the proximal side and the distal side of the flame holder;
- a burner tile positioned adjacent to the fuel nozzle and occupying a portion of a distance between the fuel nozzle and the proximal side of the flame holder;
- and
- a primary fuel control valve configured to control fuel flow from a fuel source to the primary fuel nozzle, and a secondary fuel control valve configured to control fuel flow from the fuel source to the secondary fuel nozzle;
- wherein the distance between the fuel nozzle and the proximal side of the flame holder is selected to be sufficient for premixing of the fuel stream outputted by the fuel nozzle and an oxidizer entrained by the fuel stream.
3 more elements
A perforated flame holder for a combustion reaction, comprising:
- a disk-shaped element formed from a high-temperature-compatible material having a distal surface and a proximal surface, and including a plurality of elongated apertures extending through the disk-shaped element from the proximal surface to the distal surface, the disk-shaped element having an X:Y aspect ratio of at least 4:1;
- wherein the distal surface includes a substantially planar distal surface;
- wherein the proximal surface includes a substantially planar proximal surface;
- and
- wherein the substantially planar distal surface and the substantially planar proximal surface are parallel to one another.
2 more elements
Dependencies are inferred from the claim text.