TILTABLE MULTIPLE-STAGED COAL BURNER IN A HORIZONTAL ARRANGEMENT
First Claim
1. A horizontal fuel burner comprising:
- a fuel carrier comprising a fuel barrel and a fuel nozzle, the fuel carrier transporting solid fuel and primary air to a furnace, the fuel nozzle being tiltable about a first axis of rotation formed at the junction of the fuel barrel and tiltable fuel nozzle;
an inner secondary air plenum through which the fuel carrier extends;
an inner secondary air outlet opened to said inner secondary air plenum such that inner secondary air may travel through said inner secondary air plenum into said inner secondary air outlet, the inner secondary air outlet tilting with and forming an annular space around said tiltable fuel nozzle such that inner secondary air may exit the fuel burner with solid fuel and primary air from said fuel nozzle.
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Accused Products
Abstract
Horizontally arranged burners for boiler furnaces are provided where each burner includes a fuel nozzle surrounded by a secondary air outlet. The fuel nozzle and secondary air outlets may tilt in tandem with respect to an air plenum supplying inner secondary air and a fuel carrier providing fuel. Also provided are outer secondary air buckets that may independently tilt with respect to a frame connected to the air plenum. This arrangement can be installed as a retrofit in a conventional horizontal furnace system or in a newly built system. The fuel nozzle and secondary air outlet, and secondary air buckets may all tilt in unison or may all tilt independently. The tilting assists with optimizing a flame temperature profile within the furnace.
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Citations
21 Claims
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1. A horizontal fuel burner comprising:
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a fuel carrier comprising a fuel barrel and a fuel nozzle, the fuel carrier transporting solid fuel and primary air to a furnace, the fuel nozzle being tiltable about a first axis of rotation formed at the junction of the fuel barrel and tiltable fuel nozzle; an inner secondary air plenum through which the fuel carrier extends; an inner secondary air outlet opened to said inner secondary air plenum such that inner secondary air may travel through said inner secondary air plenum into said inner secondary air outlet, the inner secondary air outlet tilting with and forming an annular space around said tiltable fuel nozzle such that inner secondary air may exit the fuel burner with solid fuel and primary air from said fuel nozzle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of assembling a horizontal burner comprising:
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mounting an inner secondary air outlet with internal fuel nozzle to a fuel carrier at a first axis of rotation such that the inner secondary air outlet and fuel nozzle may tilt with respect to the fuel carrier about the first axis of rotation, mounting a first outer secondary air bucket to the frame at a second axis of rotation such that the first outer secondary air bucket may tilt with respect to the frame about the second axis of rotation; mounting a second outer secondary air bucket to the frame at a third axis of rotation such that the second outer secondary air bucket may tilt with respect to the frame about the third axis of rotation. - View Dependent Claims (16, 17)
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18. A boiler system comprising:
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a furnace; a plurality of horizontal burners supplying fuel and air to said furnace, said plurality of burners each comprising; a fuel carrier comprising a fuel barrel and a tiltable fuel nozzle, the fuel nozzle being tiltable about an end portion of the fuel barrel; an inner secondary air plenum through which the fuel carrier extends; an inner secondary air outlet open to said inner secondary air plenum, the inner secondary air outlet surrounding said fuel nozzle and being tiltable therewith. - View Dependent Claims (19, 20)
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21. A burner nozzle for a solid fuel furnace, said burner nozzle comprising:
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an inlet end and an outlet end, said outlet end forming a plurality of lobes; an inner pipe mounted between said inlet end and said outlet end, said inner pipe forming an annular space with said burner nozzle; whereby fuel and air may pass both within said annular space and said inner pipe.
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Specification