Solid fuel burner
First Claim
1. A solid fuel/oxygen burner comprising:
- an upstream section, an intermediary section, and a downstream section;
a solid fuel conduit extending through the intermediary and downstream sections for transporting a mixture of solid fuel in a transport gas, the solid fuel conduit having a greater cross-sectional area in the downstream section than in the intermediary section;
a tubular fuel separator positioned within the solid fuel conduit in the downstream section, the fuel separator being bounded by an inlet plane and a outlet plane, the fuel separator dividing the fuel conduit into an inner nozzle having a cross-sectional area and an outer annular nozzle having a cross-sectional area, wherein the ratio of the outer nozzle cross-sectional area to the inner nozzle cross-sectional area measured at the outlet plane is greater than 1; and
fuel wedges positioned within the outer nozzle spanning from the tubular fuel separator to the solid fuel conduit thereby forming discharge passages between the fuel wedges, each fuel wedge having an upstream apex and expanding circumferentially to a downstream base aligned with the outlet plane of the fuel separator.
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Accused Products
Abstract
A solid fuel/oxygen burner including an upstream section, an intermediary section, and a downstream section, a solid fuel conduit extending through the intermediary and downstream sections for transporting a mixture of solid fuel in a transport gas, the solid fuel conduit having a greater cross-sectional area in the downstream section than in the intermediary section, and a tubular fuel separator positioned within the solid fuel conduit in the downstream section, the fuel separator being bounded by an inlet plane and a outlet plane, the fuel separator dividing the fuel conduit into an inner nozzle having a cross-sectional area and an outer annular nozzle having a cross-sectional area, wherein the ratio of the outer nozzle cross-sectional area to the inner nozzle cross-sectional area measured at the outlet plane is greater than 1.
32 Citations
14 Claims
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1. A solid fuel/oxygen burner comprising:
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an upstream section, an intermediary section, and a downstream section; a solid fuel conduit extending through the intermediary and downstream sections for transporting a mixture of solid fuel in a transport gas, the solid fuel conduit having a greater cross-sectional area in the downstream section than in the intermediary section; a tubular fuel separator positioned within the solid fuel conduit in the downstream section, the fuel separator being bounded by an inlet plane and a outlet plane, the fuel separator dividing the fuel conduit into an inner nozzle having a cross-sectional area and an outer annular nozzle having a cross-sectional area, wherein the ratio of the outer nozzle cross-sectional area to the inner nozzle cross-sectional area measured at the outlet plane is greater than 1; and fuel wedges positioned within the outer nozzle spanning from the tubular fuel separator to the solid fuel conduit thereby forming discharge passages between the fuel wedges, each fuel wedge having an upstream apex and expanding circumferentially to a downstream base aligned with the outlet plane of the fuel separator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A regenerative furnace comprising:
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a burner block having at least one firing port mounted in a sidewall of the furnace; and one or more solid fuel/oxygen burners positioned near an edge of the at least one firing port, the burner comprising; an upstream section, an intermediary section, and a downstream section; a solid fuel conduit extending through the intermediary and downstream sections for transporting a mixture of solid fuel in a transport gas, the solid fuel conduit having a greater cross-sectional area in the downstream section than in the intermediary section; and a tubular fuel separator positioned within the solid fuel conduit in the downstream section, the fuel separator being bounded by an inlet plane and a outlet plane, the fuel separator dividing the fuel conduit into an inner nozzle having a cross-sectional area and an outer annular nozzle having a cross-sectional area, wherein the ratio of the outer nozzle cross-sectional area to the inner nozzle cross-sectional area measured at the outlet plane is greater than 1; and fuel wedges positioned within the outer nozzle spanning from the tubular fuel separator to the solid fuel conduit thereby forming discharge passages between the fuel wedges, each fuel wedge having an upstream apex and expanding circumferentially to a downstream base aligned with the outlet plane of the fuel separator.
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Specification