Low NOx nozzle tip for a pulverized solid fuel furnace
First Claim
1. A nozzle tip for a pulverized solid fuel pipe nozzle of a pulverized solid fuel-fired furnace that reduces NOx emissions, the nozzle tip comprising:
- a primary air shroud having an inlet and an outlet , wherein the inlet receives a fuel flow;
a first splitter plate having a flow splitter positioned generally in the center of, and separated from the primary air shroud, the flow splitter having a wedge shape with an apex edge and a base, the apex edge positioned closer to the inlet and the base positioned closer to the outlet, the flow splitter extending only partially across the outlet, the flow splitter creating turbulence in the fuel flow that disperses the fuel flow as the fuel flow passes by the flow splitter and out of outlet,wherein the base extends on opposing sides of the first splitter plate in the center.
2 Assignments
0 Petitions
Accused Products
Abstract
A nozzle tip [100] for a pulverized solid fuel pipe nozzle [200] of a pulverized solid fuel-fired furnace includes: a primary air shroud [120] having an inlet [102] and an outlet [104], wherein the inlet [102] receives a fuel flow [230]; and a flow splitter [180] disposed within the primary air shroud [120], wherein the flow splitter disperses particles in the fuel flow [230] to the outlet [104] to provide a fuel flow jet which reduces NOx in the pulverized solid fuel-fired furnace. In alternative embodiments, the flow splitter [180] may be wedge shaped and extend partially or entirely across the outlet [104]. In another alternative embodiment, flow splitter [180] may be moved forward toward the inlet [102] to create a recessed design.
15 Citations
20 Claims
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1. A nozzle tip for a pulverized solid fuel pipe nozzle of a pulverized solid fuel-fired furnace that reduces NOx emissions, the nozzle tip comprising:
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a primary air shroud having an inlet and an outlet , wherein the inlet receives a fuel flow; a first splitter plate having a flow splitter positioned generally in the center of, and separated from the primary air shroud, the flow splitter having a wedge shape with an apex edge and a base, the apex edge positioned closer to the inlet and the base positioned closer to the outlet, the flow splitter extending only partially across the outlet, the flow splitter creating turbulence in the fuel flow that disperses the fuel flow as the fuel flow passes by the flow splitter and out of outlet, wherein the base extends on opposing sides of the first splitter plate in the center. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A nozzle tip for a pulverized solid fuel pipe nozzle of a pulverized solid fuel-fired furnace that reduces NOx emissions, the nozzle tip comprising:
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a primary air shroud having an inlet and an outlet, wherein; the inlet receives solid fuel particles suspended in an airflow stream as a fuel flow, the outlet generally has a cross-sectional shape with a plurality of lobes each radiating from a central location; a flow splitter disposed within the primary air shroud substantially at the central location, the flow splitter functioning to deflect solid particles of the fuel flow into each lobe of the output and disperse the particles within the lobes allowing for combustion of the fuel flow with reduced NOx emissions. - View Dependent Claims (8)
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9. A nozzle tip for a pulverized solid fuel pipe nozzle of a pulverized solid fuel-fired furnace that reduces NOx emissions, the nozzle tip comprising:
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a primary air shroud having an inlet and an outlet, wherein the inlet receives a fuel flow; a first splitter plate disposed within the primary air shroud, the first splitter plate and the primary air shroud defining a duct for receiving a first portion of the fuel flow; and a second splitter plate disposed within the primary air shroud, the second splitter plate and the primary air shroud defining a duct for receiving a second portion of the fuel flow, wherein the first splitter plate, the second splitter plate, and the primary air shroud define a duct for receiving a third portion of the fuel flow disposed intermediate to the first portion and the second portion of the fuel flow, the third portion of the fuel flow comprising a first split flow and a diverging second split flow; wherein the first split flow and the first portion of the fuel flow combine at the outlet of the primary air shroud to provide a first outlet fuel jet which exits the outlet of the primary air shroud; wherein the second split flow and the second portion of the fuel flow combine at the outlet of the primary air shroud to provide a second outlet fuel jet; wherein the first outlet fuel jet and second outlet fuel jet are divergent; and wherein the first splitter plate and the second splitter plate are divergent outwardly. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification