A nozzle in a burner assembly is configured to produce a flame. The nozzle is configured to include a fuel-discharge outlet and to conduct fuel along a path in the nozzle to the fuel-discharge outlet. Pressurized primary oxygen is provided to mix with fuel discharged by the nozzle to produce a mixtu
A nozzle in a burner assembly is configured to produce a flame. The nozzle is configured to include a fuel-discharge outlet and to conduct fuel along a path in the nozzle to the fuel-discharge outlet. Pressurized primary oxygen is provided to mix with fuel discharged by the nozzle to produce a mixture that can be ignited to produce a flame. Staged oxygen is provided to the flame in a region downstream from the nozzle.
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1. A burner apparatus for combining oxygen and fuel to produce a mixture to be burned, the burner apparatus comprising an oxygen-delivery system comprising an oxygen-receiving plenum adapted to receive pressurized oxygen from an oxygen source and a primary oxygen-supply housing formed to include a p
1. A burner apparatus for combining oxygen and fuel to produce a mixture to be burned, the burner apparatus comprising an oxygen-delivery system comprising an oxygen-receiving plenum adapted to receive pressurized oxygen from an oxygen source and a primary oxygen-supply housing formed to include a primary-oxygen chamber, an oxygen-discharge outlet opening into the primary-oxygen chamber, and a boundary wall arranged to form a boundary of the primary-oxygen chamber and to include several constant-flow oxygen-inlet orifices arranged to communicate pressurized oxygen constantly from the oxygen-receiving plenum into the primary-oxygen chamber of the primary oxygen-supply housing to establish primary oxygen in the primary oxygen-supply housing,a fuel-discharge nozzle arranged to lie partly in the primary-oxygen chamber and extend through the oxygen-discharge outlet to reach a first-stage combustion zone located outside of the primary-oxygen chamber and configured to conduct fuel received from a fuel source to the first-stage combustion zone to mix with primary oxygen exiting the primary-oxygen chamber through the oxygen-discharge outlet to establish a combustible oxygen-fuel mixture in the first-stage combustion zone that is ignitable to produce a flame having a root lying in the first-stage combustion zone and a tip lying in a second-stage combustion zone downstream from the first-stage combustion zone, wherein the oxygen-delivery system further comprises a staged-oxygen conduit coupled in fluid communication to the oxygen-receiving plenum and configured to conduct staged oxygen discharged under pressure from the oxygen-receiving plenum to the second-stage combustion zone without passing through the primary-oxygen chamber, anda variable oxygen-diversion system configured to provide means for diverting a variable amount of pressurized oxygen extant in the oxygen-receiving plenum to flow from the oxygen-receiving plenum into the primary-oxygen chamber without flowing through the constant-flow oxygen-inlet orifices to supplement pressurized oxygen admitted into the primary-oxygen chamber through the constant-flow oxygen-inlet orifices so that more primary oxygen is provided in the primary-oxygen chamber and delivered through the oxygen-discharge outlet formed in the primary oxygen-supply housing to the first-stage combustion zone and proportionally less staged oxygen is delivered through the staged-oxygen conduit to the second-stage combustion zone,wherein the variable oxygen-diversion system is formed to include an oxygen-diversion passageway arranged to connect the oxygen-receiving plenum in fluid communication with the primary-oxygen chamber and an oxygen-flow control valve arranged to extend into the oxygen-diversion passageway and move therein to vary the flow of pressurized oxygen from the oxygen-receiving plenum into the primary-oxygen chamber of the primary oxygen-supply housing. 2. The burner apparatus of claim 1, wherein the boundary wall of the primary oxygen-supply housing is formed to include a variable-flow oxygen-admission port opening into the oxygen-diversion passageway. 3. The burner apparatus of claim 2, wherein the variable-flow oxygen-admission port is arranged to lie in upstream and spaced-apart relation to the oxygen-discharge outlet associated with the primary-oxygen chamber and the constant-flow oxygen-inlet orifices are arranged to lie in a space provided between the variable-flow oxygen-admission port and the oxygen-discharge outlet. 4. The burner apparatus of claim 2, wherein the boundary wall provides a floor of the primary oxygen supply housing and a ceiling of the oxygen-receiving plenum, a side wall of the oxygen-receiving plenum is formed to include a primary-oxygen aperture opening into the oxygen-diversion passageway through which pressurized oxygen exiting the oxygen-receiving plenum flows when the oxygen-flow control valve is moved to an opened position and a staged-oxygen aperture opening into the staged oxygen conduit through which pressurized oxygen flows constantly toward the second-stage combustion zone. 5. The burner apparatus of claim 1, wherein the primary oxygen-supply housing includes first and second side walls arranged to lie in spaced-apart relation to locate the boundary wall therebetween to cause the boundary wall to extend from the first side wall to the second side wall, the oxygen-diversion passageway is arranged to extend laterally along an underside of the boundary wall in a direction from the first side wall toward the second side wall, the boundary wall is formed to include a left upstream oxygen-admission port opening into the oxygen-diversion passageway and lying in spaced-apart relation to the first side wall and a right upstream oxygen-admission port opening into the oxygen-diversion passageway and lying between the left upstream oxygen-admission port and the first side wall. 6. The burner apparatus of claim 5, wherein the oxygen-diversion passageway includes a central valve-receiver channel receiving the oxygen-flow control valve and supporting the oxygen-flow control valve for rotation about an axis between an opened position communicating pressurized oxygen from the oxygen-receiving plenum to the primary-oxygen chamber through the oxygen-diversion passageway and a closed position blocking flow of pressurized oxygen from the oxygen-receiving plenum to the primary-oxygen chamber through the oxygen-diversion passageway. 7. The burner apparatus of claim 5, wherein the variable oxygen-diversion system includes a diverter housing arranged to extend along an underside of the boundary wall from the first side wall to the second side wall and the diverter housing is formed to include an elongated oxygen-distribution channel arranged to extend between the first and second side walls and coupled in fluid communication to each of the left and right upstream oxygen-admission ports, a primary-oxygen-intake channel opening into the oxygen-receiving plenum, and a central valve-receiver channel connecting the elongated oxygen-distribution channel in fluid communication with the primary-oxygen-intake channel and supporting the oxygen-flow control valve therein for movement between an opened position allowing flow of pressurized oxygen from the oxygen-receiving plenum, in series, through the oxygen-intake channel, the central valve-receiver channel, the elongated oxygen-distribution channel, and each of the left and right upstream oxygen-admission ports into the primary-oxygen chamber and a closed position blocking flow of pressurized oxygen the oxygen-receiving plenum, in series, through the oxygen-intake channel, the central valve-receiver channel, the elongated oxygen-distribution channel, and each of the left and right upstream oxygen-admission ports into the primary-oxygen chamber. 8. The burner of claim 5, wherein the boundary wall includes a right border strip located between the right upstream oxygen-admission port and the first side wall of the primary oxygen-supply housing and formed to include a first of the several constant-flow oxygen-inlet orifices, a left border strip located between the left upstream oxygen-admission port and the second side wall of the primary oxygen-supply housing and formed to include a second of the several constant-flow oxygen-inlet orifices, and a center panel located between the left and right border strips and formed to include a third of the constant-flow oxygen-inlet orifices. 9. The burner of claim 1, wherein the primary oxygen-supply housing includes first and second side walls arranged to lie in spaced-apart relation to locate the boundary wall therebetween to cause the boundary wall to extend from the first side wall to the second side wall, and the boundary wall includes a right upstream oxygen-admission port opening into the oxygen-diversion passageway, a right border strip arranged to extend along the first side wall and lie between the right upstream oxygen-admission port and the first side wall and formed to include at least one of the downstream constant-flow oxygen-inlet orifices, a left upstream oxygen-admission port opening into the oxygen-diversion passageway, a left border strip arranged to extend along the second side wall and lie between the left upstream oxygen-admission port and the second side wall and formed to include at least one of the downstream constant-flow oxygen-inlet orifices, an upstream center panel arranged to lie between the right and left border strips and formed to include the right and left upstream oxygen-admission ports, and a downstream center panel arranged to lie between the right and left border strips and between the upstream center panel and the oxygen-discharge outlet associated with the primary-oxygen chamber and formed to include at least one of the downstream constant-flow oxygen-inlet orifices. 10. The burner of claim 9, wherein the primary oxygen-supply housing further includes a top wall arranged to lie in spaced-apart relation to the boundary wall and coupled to the first and second side walls to locate the primary-oxygen chamber therebetween, the fuel-discharge nozzle is arranged to lie between the top wall and the boundary wall to define an upper region of the primary-oxygen chamber located between the top wall and the fuel-discharge nozzle and a lower region of the primary-oxygen chamber located between the fuel-discharge nozzle and the boundary wall, the at least one of the downstream constant-flow oxygen-inlet ports formed in the right border strip of the boundary wall is formed to define right jet means for discharging a stream of pressurized oxygen exiting the air-receiving plenum up and over the fuel-discharge nozzle from the lower region into the upper region of the primary-oxygen chamber to flow in a direction generally toward the second side wall, and the at least one of the downstream constant-flow oxygen-inlet ports formed in the left-border strip of the boundary wall is formed to define left jet means for discharging a stream of pressurized oxygen exiting the oxygen-receiving plenum up and over the fuel-discharge nozzle from the lower region into the upper region of the primary-oxygen chamber in a direction generally toward the first side wall to commingle with the stream of pressurized oxygen discharged by the right jet means and flow into and through the oxygen-discharge outlet while streams of pressurized oxygen exiting the oxygen-receiving plenum through the left and right upstream oxygen-admission ports formed in the upstream center panel and through the at least one constant-flow oxygen-inlet port formed in the downstream center panel flows into and through the lower region of the primary-oxygen chamber to reach and flow through the oxygen-discharge outlet. 11. The burner of claim 9, wherein the upstream center panel further includes a middle upstream oxygen-admission port lying between and in spaced-apart relation to the right and left upstream oxygen-admission ports and opening into the oxygen-diversion passageway and communicating with the lower region of the primary-oxygen chamber. 12. The burner of claim 9, wherein two constant-flow oxygen-inlet ports are formed in the left border strip, and four constant-flow oxygen-inlet ports are formed in the downstream center panel and arranged to lie in spaced-apart relation to one another and lie in a space provided between the two constant-flow oxygen-inlet ports formed in the right border strip and the two constant-flow oxygen-inlet ports formed in the left border strip. 13. The burner of claim 12, wherein the oxygen-flow control valve is supported for rotation about an axis of rotation between an opened position communicating pressurized oxygen from the oxygen-receiving plenum to the primary-oxygen chamber through the oxygen-diversion passageway and the right and left upstream oxygen-admission ports and a closed position blocking flow of pressurized oxygen from the oxygen-receiving plenum to the primary-oxygen chamber through the oxygen-diversion passageway and the right and left upstream oxygen-admission ports and wherein a first of the constant-flow oxygen-inlet ports formed in the right border strip, the four constant-flow oxygen-inlet ports formed in the downstream center panel, and a first of the constant-flow oxygen-inlet ports formed in the left border strip are arranged to extend in series generally along a reference line that is arranged to lie in substantially parallel spaced-apart relation to the axis of rotation of the oxygen-flow control valve. 14. The burner of claim 9, wherein the primary oxygen-supply housing further includes a downstream wall arranged to interconnect the first and second side walls and formed to include the oxygen-discharge outlet and an oxygen-diffuser screen arranged to lie between the downstream constant-flow oxygen-inlet ports and the downstream wall to partition the primary-oxygen chamber into an upstream section communicating with the upstream oxygen-admission ports and the downstream constant-flow oxygen-inlet ports and a downstream section communicating with the oxygen-discharge outlet, the fuel-discharge nozzle is arranged to extend through a nozzle-receiving slot formed in the oxygen-diffuser screen, and the oxygen-diffuser screen is formed to include an array of holes cooperating to define means for diffusing the flow of pressurized primary oxygen passing from the upstream section into the downstream section toward the oxygen-discharge outlet. 15. A burner apparatus for combining oxygen and fuel to produce a combustible mixture that can be ignited to produce a flame, the burner apparatus comprising an oxygen-receiving plenum adapted to receive pressurized oxygen from an oxygen source,a fuel supply system including a fuel-discharge nozzle configured to discharge fuel to a first-stage combustion zone associated with the root of a flame, andan oxygen-supply system including an oxygen conductor including a primary oxygen supply conduit arranged to couple the oxygen-receiving plenum in fluid communication with the first-stage combustion zone to provide primary oxygen to mix with fuel discharged from the fuel-discharge nozzle to produce a combustible mixture that can be ignited to produce the flame and a staged oxygen supply conduit arranged to couple the oxygen-receiving plenum in fluid communication with a second-stage combustion zone arranged to lie in spaced-apart relation to the fuel-discharge nozzle to locate the first-stage combustion zone therebetween and associated with the tip of the flame to provide staged oxygen to mix with fuel associated with the flame to complete combustion of the fuel discharged from the fuel-discharge nozzle, wherein the oxygen conductor further includes field-adjustable control means for varying the ratio of primary oxygen flowing from the oxygen-receiving plenum through the primary oxygen conduit to the first-stage combustion zone associated with the root of the flame to staged oxygen flowing from the oxygen-receiving plenum through the staged oxygen conduit to the second-stage combustion zone associated with the tip of the flame while maintaining at least a minimum flow of pressurized oxygen from the oxygen-receiving plenum as primary oxygen to the first-stage combustion zone,wherein the field-adjustable control means comprises at least one constant-flow oxygen-inlet orifice provided to communicate pressurized oxygen from the oxygen-receiving plenum to the first-stage combustion zone and a single oxygen-flow control valve mounted for rotation about an axis of rotation between an opened position allowing flow of pressurized oxygen from the oxygen-receiving plenum through an oxygen-diversion passageway to the first-stage combustion zone and a closed position blocking flow of pressurized oxygen from the oxygen-receiving plenum through the oxygen-diversion passageway to the first-stage combustion zone without blocking flow of pressurized oxygen from the oxygen-receiving plenum through the at least one constant-flow oxygen-inlet orifice. 16. The burner apparatus of claim 15, wherein the oxygen-supply system further includes a primary oxygen-supply housing formed to include a primary-oxygen chamber defining a portion of the primary oxygen supply conduit and communicating with the first-stage combustion zone and receiving pressurized oxygen from the oxygen-receiving plenum through the constant-flow oxygen-inlet orifice and, when the single oxygen-flow control valve is rotated to assume the opened position, through the oxygen-diversion passageway and wherein the primary-oxygen supply housing includes a boundary wall located alongside the oxygen-receiving plenum and formed to include the at least one constant-flow oxygen-inlet orifice and a variable-flow oxygen-admission port communicating with the oxygen-diversion passageway and opening into the primary-oxygen chamber. 17. The burner apparatus of claim 15, wherein the oxygen-supply system further includes a primary oxygen-supply housing formed to include a primary-oxygen chamber defining a portion of the primary oxygen-supply conduit and the field-adjustable control means comprises an oxygen-diversion unit coupled to the primary oxygen-supply housing and formed to include an oxygen-diversion passageway connecting the oxygen-receiving plenum in communicating with the primary-oxygen chamber and an oxygen-flow control valve mounted in the oxygen-diversion passageway for movement between an opened position allowing flow of pressurized oxygen from the oxygen-receiving plenum to the primary-oxygen chamber through the oxygen-diversion passageway and a closed position blocking flow of pressurized oxygen from the oxygen-receiving plenum to the primary-oxygen chamber through the oxygen-diversion passageway. 18. The burner apparatus of claim 17, wherein the primary oxygen-supply housing includes a boundary wall separating the primary-oxygen chamber from the oxygen-receiving plenum and wherein the boundary wall is formed to include at least one constant-flow oxygen-inlet orifice communicating with the oxygen-receiving plenum and opening into the primary-oxygen chamber and a variable-flow oxygen-admission port communicating with the oxygen-diversion passageway and opening into the primary-oxygen chamber.
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이 특허에 인용된 특허 (6)
Gerlach Charles R. (San Antonio TX) Heath Rodney T. (Farmington NM) Dean Alvin (Bloomfield NM), Burner with variable secondary air controller.
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