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US 12,359,804 B2Granted
Burner system with discrete transverse flame stabilizers
AssigneeClearsign Technologies Corporation
InventorsVenkatesh Iyer, Colin James Deller, Jeff Lewallen, Donald Kendrick, James K. Dansie, Douglas W. Karkow
Life of this patent
Estimating the term…
Abstract
A combustion system includes a fuel and oxidant source and a flame holder. The flame holder includes a plurality of discrete slats arranged in parallel defining combustion channels between adjacent slats. Pairs of adjacent slats may be oriented to operate substantially as a V-gutter. The fuel and oxidant source outputs fuel and oxidant into the combustion channels. The flame holder holds a combustion reaction of the fuel and oxidant in the combustion channels.
Claims44
A combustion system, comprising:
- a fuel and oxidant source configured to output fuel and oxidant;
- and
- a flame holder including:
- a plurality of slats arranged to be longitudinally parallel with each other, respective pairs of the slats each forming a v-shaped channel, each slat having:
- a first edge proximal to the fuel and oxidant source;
- and
- a second edge distal from the fuel and oxidant source;
- a support structure holding the slats;
- and
- a plurality of combustion channels each between respective adjacent pairs of slats, each combustion channel having a tapered cross-sectional shape defined by a wider width corresponding to a distance between the respective first edges of adjacent pairs of slats and a narrower width corresponding to a distance between the respective second edges of the adjacent pairs of slats and having a length corresponding to a distance between a plane defined by the first edges and a plane defined by the second edges of the plurality of slats, the flame holder being positioned to receive the fuel and oxidant into the combustion channels and to collectively hold a combustion reaction of the fuel and oxidant primarily within the combustion channels;
- wherein a first slat and a second slat of each of the pairs of slats are separated at their respective first edges by a first, non-zero distance and are separated at their respective second edges by a second distance, the first distance being smaller than the second distance.
8 more elements
A combustion system, comprising:
- a fuel and oxidant source configured to output fuel and oxidant;
- and
- a flame holder including:
- a plurality of slats arranged to be longitudinally with each other, respective pairs of the s each forming a v-shaped channel, each slat having:
- a first edge proximal to the fuel and oxidant source;
- and
- a second edge distal from the fuel and oxidant source;
- a support structure holding the slats;
- and
- a plurality of combustion channels each between respective adjacent pairs of slats, each combustion channel having a tapered cross-sectional shape defined by a wider width corresponding to a distance between the respective first edges of adjacent pairs of slats and a narrower width corresponding to a distance between the respective second edges of the adjacent pairs of slats and having a length corresponding to a distance between a plane defined by the first edges and a plane defined by the second edges of the plurality of slats, the flame holder being positioned to receive the fuel and oxidant into the combustion channels and to collectively hold a combustion reaction of the fuel and oxidant primarily within the combustion channels,
- wherein the support structure includes a plurality of pairs of first slots each holding a first end region of a respective slat, each pair of the first slots being formed at predetermined angles with respect to a flow axis of the combustion system to form a “V” shape.
8 more elements
A method, comprising:
- outputting fuel and oxidant from a fuel and oxidant source;
- supporting a plurality of slats of a flame holder, the slats being arranged longitudinally parallel to each other in pairs each forming a v-shaped channel, each slat having a first edge proximal to the fuel and oxidant source and a second edge distal from the fuel and oxidant source;
- receiving the fuel and oxidant into a plurality of combustion channels each disposed between respective adjacent v-shaped channels formed by the pairs of slats, each combustion channel having a tapered cross-sectional shape defined by a wider width corresponding to a distance between the respective first edges of adjacent pairs of slats and a narrower width corresponding to a distance between the respective second edges of the adjacent pairs of slats and having a length corresponding to a distance between a plane defined by the first edges and a plane defined by the second edges of the plurality of slats;
- and
- holding a combustion reaction of the fuel and oxidant primarily within the combustion channels;
- wherein outputting the fuel and the oxidant from the fuel and oxidant source includes expelling fuel from one or more fuel nozzles oriented to expel the fuel in a fuel and oxidant flow direction, and
- wherein supporting the slats includes supporting the flame holder a predetermined distance distal to the one or more fuel nozzles in the fuel and oxidant flow direction.
4 more elements
A method, comprising:
- outputting fuel and oxidant from a fuel and oxidant source;
- supporting a plurality of slats of a flame holder, the slate being arranged longitudinally parallel to each other in pairs each forming a v-shaped channel, each slat having a first edge proximal to the fuel and oxidant source and a seco distal from the fuel and oxidant source;
- receiving the fuel and oxidant into a plurality of combustion channels each disposed between respective adjacent v-shaped channels formed by the pairs of slats, each combustion channel having a tapered cross-sectional shape defined by a wider width corresponding to a distance between the respective first edges of adjacent pairs of slats and a narrower width corresponding to a distance between the respective second edges of the adjacent pairs of slats and having a length corresponding to a distance between a plane defined by the first edges and a plane defined by the second edges of the plurality of slats;
- holding a combustion reaction of the fuel and oxidant primarily within the combustion channels;
- and
- supporting a pilot flame upstream, downstream, or impinging upon the slats to hold the combustion reaction within the combustion channels.
3 more elements
A combustion system, comprising:
- a fuel and oxidant source configured to output fuel and oxidant;
- and
- a flame holder including:
- a plurality of non-cylindrical elongated members arranged to be longitudinally parallel with each other, each elongated member having at least a first surface and a second surface and first and second ends, a first set of the elongated members when viewed from a first end thereof having the first surfaces of the first set of the elongated members inclined toward the fuel and oxidant source relative to a flow of the fuel and oxidant, a second set of the elongated members when viewed from the first end thereof having the first surfaces of the second set of elongated members inclined toward the fuel and oxidant source relative to the flow of the fuel and oxidant, the incline of the first set of elongated members being opposite the incline of the second set of elongated members, each elongated member of the first set of elongated members respectively being disposed adjacent to a respective elongated member of the second set of elongated members such that respective pairs of the elongated members from the first set and the second set each form a v-shaped channel, each elongated member having:
- a first edge proximal to the fuel and oxidant source;
- and
- a second edge distal from the fuel and oxidant source;
- a support structure holding the elongated members;
- and
- a plurality of combustion channels each between respective adjacent pairs of elongated members, each combustion channel having a cross-sectional shape defined by a wider width corresponding to a distance between the respective first edges of adjacent pairs of elongated members and a narrower width corresponding to a distance between the respective second edges of the adjacent pairs of elongated members and having a length corresponding to a distance between a plane defined by the first edges and a plane defined by the second edges of the plurality of elongated members, the length being at least five times the narrower width, the flame holder being positioned to receive the fuel and oxidant into the combustion channels and to collectively hold a combustion reaction of the fuel and oxidant primarily within the combustion channels.
7 more elements
Dependencies are inferred from the claim text.