Claims
- 1. A burner assembly for combining air and fuel to produce a burn firing into a tube heating a solution tank formed to include an interior solution-containing region, the burner assembly comprising
- a funnel formed to include an inlet end, an outlet end, and a mixing region communicating with the inlet and outlet end, the funnel having a central longitudinal axis and including a cylindrical intake end at the inlet end and a conical side wall mating with the cylindrical intake end and converging from the cylindrical intake end toward the outlet end to fire a burn produced in the mixing region into a tube coupled to the outlet end of the funnel and extended into the interior solution-containing region of the solution tank,
- means for supplying a gaseous fuel to the mixing region in the funnel,
- means for introducing combustion air into the mixing region through the inlet end in the funnel to mix with the gaseous fuel in the mixing region to produce a combustible mixture, the introducing means includes an air-mixing plate mounted in the inlet end of the funnel and formed to include a plurality of air supply apertures passing combustion air into the mixing region,
- means for mounting the funnel in a position outside and away from the interior solution-containing region of the solution tank, and
- means for igniting the combustible mixture in the mixing region of the funnel to cause partial combustion to take place in the mixing region and to fire a burn into the tube coupled to the outlet end of the funnel and extended into the interior solution-containing region of the solution tank so that combustion begins in the mixing region in the funnel, progresses and transitions gradually into the tube, and is completed outside of the mixing region and inside the tube, and wherein the conical side wall has a first effective length along the central longitudinal axis of the funnel, the cylindrical intake end has a second effective length along the central longitudinal axis of the funnel, and the ratio of the first effective length to the second effective length is at least 7.75 and at most 10.95.
- 2. The burner assembly of claim 1, wherein the introducing means includes a burner housing formed to include a discharge outlet and an interior region containing combustion air, the funnel is located in the interior region of the burner housing to position the air-mixing plate in the interior region so that combustion air in the interior region is supplied into the mixing region through the air supply apertures in the air-mixing plate, and the outlet end of the funnel is coupled to the discharge outlet of the burner housing so that a burn beginning in the mixing region of the funnel is fired into a tube positioned outside the burner housing and coupled to the housing at the discharge outlet.
- 3. The burner assembly of claim 2, wherein the burner housing is formed to include an air supply inlet and the funnel is mounted in the interior region of the burner housing to position the conical side wall in close proximity to and facing toward the air supply inlet.
- 4. The burner assembly of claim 3, wherein the burner housing includes a wall surrounding the conical side wall of the funnel to define channel means for distributing combustion air admitted into the interior region through the air supply inlet around the periphery of the conical side wall to cool a combustible mixture in the mixing region in the funnel and for conducting combustion air into the mixing region in the funnel only through the air supply apertures formed in the air-mixing plate mounted in the inlet end of the funnel.
- 5. The burner assembly of claim 3, wherein the burner housing includes a rear wall, a front wall, and a side wall extending between the front and rear wall, the front wall is formed to include the discharge outlet and means for supporting the outlet end of the funnel in the discharge outlet, and the supplying means is coupled to the rear wall and the air-mixing plate to support the inlet end of the funnel in the interior region of the burner housing facing toward the rear wall.
- 6. The burner assembly of claim 3, wherein the burner housing includes a rear wall, a front wall, and a side wall extending between the front and rear wall, the front wall is formed to include the discharge outlet, and the side wall of the burner housing is positioned to surround the conical side wall of the funnel and is formed to include the air supply inlet.
- 7. The burner assembly of claim 1, wherein the supplying means includes a nozzle extending into the mixing region through an aperture formed in the air-mixing plate.
- 8. The burner assembly of claim 7, wherein the nozzle includes an annular side wall and a closed end wall positioned in the mixing region and the annular side wall is formed to include a plurality of gaseous fuel discharge ports.
- 9. The burner assembly of claim 7, wherein the nozzle includes a longitudinal axis and an annular portion situated in the mixing region and formed to include means for discharging gaseous fuel from the nozzle into the mixing region at right angles to the longitudinal axis of the nozzle along an interior wall of the air-mixing plate.
- 10. The burner assembly of claim 1, wherein the introducing means includes a burner housing formed to include a discharge outlet and an interior region containing combustion air, and the funnel is located in the interior region of the burner housing to position the air-mixing plate in the interior region so that combustion air in the interior region is supplied into the mixing region through the air supply apertures in the air-mixing plate, the outlet end of the funnel is coupled to the discharge outlet of the burner housing so that a burn produced in the mixing region of the funnel is fired into a heater tube positioned outside the burner housing and coupled to the outlet end of the funnel through the discharge outlet, and further comprising means for mounting the burner housing on an exterior portion of a tank containing said heater tube in the tank through the discharge outlet of the burner housing so that the burner housing and funnel are situated outside of the tank and arranged to fire the burn produced in the mixing region of the funnel into the heater tube.
- 11. The burner assembly of claim 10, wherein the burner housing is formed to include an air supply inlet into the interior region and the introducing means further includes a low-pressure combustion air fan mounted on the burner housing to blow combustion air at a pressure of at most 10 inches (25.4 cm) of water column into the interior region of the burner housing through the air supply inlet.
- 12. The burner assembly of claim 11, wherein the burner housing includes a rear wall, a front wall, and a side wall extending between the front and rear wall and around the conical side wall of the funnel, the front wall is formed to include the discharge outlet, and the side wall of the burner housing is formed to include the air supply inlet facing the conical side wall of the funnel.
- 13. A burner assembly for combining air and fuel to produce a burn firing into a tube, the burner assembly comprising
- a burner housing formed to include a discharge outlet and an interior region containing combustion air,
- a thin-walled sleeve situated in the interior region, the thin-walled sleeve being formed to include an inlet end, an outlet end, and a mixing region between the inlet and outlet ends, the thin-walled sleeve having a central longitudinal axis and including a cylindrical intake end at the inlet end and a hollow conical transition section mating with the cylindrical intake end and converging toward the outlet end of the thin-walled sleeve,
- means for regulating flow of combustion air from the interior region of the burner housing into the mixing region in the thin-walled sleeve through the inlet end formed in the thin-walled sleeve,
- means for supplying a gaseous fuel into the mixing region in the thin-walled sleeve, the supplying means extending through the interior region of the burner housing and into the mixing region through the inlet end of the thin-walled sleeve,
- means for connecting the outlet end of the thin-walled sleeve to a tube positioned outside of the housing in a liquid-containing tank, the connecting means extending through the discharge outlet formed in the burner housing to fire a burn produced in the mixing region of the thin-walled sleeve into the tube to heat any liquid extant in the liquid-containing tank, the outlet end of the thin-walled sleeve defining an opening having an internal diameter equivalent to the internal diameter of a tube connected to the outlet end of the thin-walled sleeve by the connecting means, and
- means for igniting the combustible mixture in the mixing region of the thin-walled sleeve to cause partial combustion to take place in the mixing region and to fire a burn into the tube coupled to the outlet end of the thin-walled sleeve and extended into the interior solution-containing region of the solution tank so that combustion begins in the mixing region of the funnel, progresses and transitions gradually into the tube, and is completed outside of the mixing region and inside the tube, and wherein the hollow conical transition section has an effective length along the central longitudinal axis of the thin-walled sleeve and the ratio of the effective length of the hollow conical transition section to the internal diameter of the opening defined in the outlet end of the thin-walled sleeve is at least 1.37 and at most 2.58.
- 14. The burner assembly of claim 13, wherein the hollow conical transition section is formed to include an upstream opening having a first internal diameter and a downstream opening having a second internal diameter that is smaller than the first internal diameter.
- 15. The burner assembly of claim 14, wherein the inlet end of the thin-walled sleeve defines an opening having an internal diameter equivalent to the upstream opening of the hollow conical transition section.
- 16. The burner assembly of claim 15, wherein the regulating means includes an air-mixing plate mounted in the inlet end of the thin-walled sleeve and the air-mixing plate is formed to include a plurality of air supply apertures to provide the only means for passing combustion air from the interior region of the burner housing into the mixing region of the thin-walled sleeve.
- 17. The burner assembly of claim 15, wherein the thin-walled sleeve includes a longitudinal axis, the supplying means includes a nozzle lying in the mixing region along the longitudinal axis and having an annular side wall and a closed end wall, and the annular side wall is formed to include a plurality of radially outwardly facing gaseous fuel discharge ports discharging gaseous fuel into the mixing region to combine with combustion air introduced into the mixing region through the opening formed in the inlet end of the thin-walled sleeve.
- 18. The burner assembly of claim 14, wherein the outlet end of the thin-walled sleeve is appended to the burner housing at the discharge outlet to couple the mixing region in the thin-walled sleeve and the tube positioned outside of the burner housing in fluid communication through the connecting means.
- 19. The burner assembly of claim 13, wherein the regulating means includes an air-mixing plate mounted in the inlet end of the thin-walled sleeve and formed to include a plurality of air supply apertures for passing combustion air from the interior region of the burner housing into the mixing region of the thin-walled sleeve.
- 20. The burner assembly of claim 19, wherein the air-mixing plate is formed to include a central aperture and a plurality of sets of circumferentially spaced-apart air supply apertures ringing around the central aperture, and the supplying means includes a nozzle extending through the central aperture to lie in the mixing region of the thin-walled sleeve.
- 21. The burner assembly of claim 20, wherein the nozzle has an annular side wall and a closed end wall and the annular side wall is formed to include a plurality of radially outwardly facing gaseous fuel discharge ports aiming into the mixing region to combine gaseous fuel discharged therethrough with combustion air introduced into the mixing region through the air supply apertures.
- 22. The burner assembly of claim 19, wherein the burner housing is formed to include an air supply inlet and the regulating means further includes valve means in the air supply inlet for controlling the flow of combustion air admitted into the interior region of the burner housing.
- 23. The burner assembly of claim 19, wherein the burner housing is formed to include an air supply inlet and a side wall extending along and surrounding the thin-walled sleeve to define channel means for distributing combustion air admitted into the interior region through the air supply inlet around the periphery of the thin-walled sleeve to cool a combustible mixture in the mixing region.
- 24. The burner assembly of claim 19, wherein the side wall of the burner housing is formed to include the air supply inlet and the channel means couples the air supply inlet and the air supply apertures formed in the air-mixing plate in fluid communication.
- 25. The burner assembly of claim 13, wherein the supplying means includes a nozzle having an annular side wall and a closed end wall and the annular side wall is formed to include a plurality of radially outwardly facing gaseous fuel discharge ports aiming into the mixing region in the thin-walled sleeve.
- 26. The burner assembly of claim 25, wherein each set of gaseous fuel discharge ports includes three gaseous fuel discharge ports arranged in a triangular pattern.
- 27. The burner assembly of claim 13, wherein the burner housing includes a rear wall, a front wall, and a side wall extending along and around the thin-walled sleeve and interconnecting the rear and front walls to define the interior region therebetween, the front wall is formed to include the discharge outlet, the thin-walled sleeve is a funnel-shaped member coupled to the front wall at the discharge outlet, and the supplying means includes a nozzle coupled to the rear wall and formed to include a plurality of gaseous fuel discharge ports aiming into the mixing region in the thin-walled sleeve.
- 28. The burner assembly of claim 27, wherein the side wall is formed to include an air supply inlet and the regulating means includes a flow control valve in the air supply inlet.
- 29. The burner assembly of claim 27, wherein the regulating means includes an air-mixing plate in the inlet end of the thin-walled sleeve and the nozzle is coupled to the air-mixing plate to support the inlet end of the thin-walled sleeve in the interior region of the burner housing.
- 30. A burner assembly for combining air and fuel to produce a burn firing into a tube, the burner assembly comprising
- a burner housing formed to include a discharge outlet and an interior region,
- a thin-walled sleeve situated in the interior region, the thin-walled sleeve being formed to include an outlet end coupled to the discharge outlet formed in the burner housing, an opposite inlet end, and a mixing region communicating with the inlet and outlet ends, the thin-walled sleeve having a central longitudinal axis and including a cylindrical intake end at the inlet end and a hollow conical transition section mating with the cylindrical intake end and converging toward the outlet end of the thin-walled sleeve,
- means for supplying a gaseous fuel into the mixing region in the thin-walled sleeve,
- means for introducing combustion air into the mixing region in the thin-walled sleeve through the inlet end in the thin-walled sleeve, the burner housing being formed to include an air supply inlet coupled to the introducing means,
- means for connecting the outlet end of the thin-walled sleeve to a tube positioned outside of the housing in a liquid-containing tank, the connecting means extending through the discharge outlet formed in the burner housing to fire a burn produced in the mixing region of the thin-walled sleeve into the tube to heat any liquid extant in the liquid-containing tank, the outlet end of the thin-walled sleeve defining an opening having an internal diameter equivalent to the internal diameter of a tube connected to the outlet end of the thin-walled sleeve by the connecting means, and
- means for igniting the combustible mixture in the mixing region of the thin-walled sleeve to cause partial combustion to take place in the mixing region and to fire a burn into the tube coupled to the outlet end of the thin-walled sleeve and extended into the interior solution-containing region of the solution tank so that combustion begins in the mixing region in the thin-walled sleeve, progresses and transitions gradually into the tube, and is completed outside of the mixing region and inside the tube, and wherein the cylindrical intake end has an effective length along the central longitudinal axis of the thin-walled sleeve, and the ratio of the effective length of the cylindrical intake end to the internal diameter of the opening defined in the outlet end of the thin-walled sleeve is at least 0.125 and at most 0.50.
- 31. The burner assembly of claim 30, wherein the thin-walled sleeve is mounted to position a side wall of the hollow conical transition section in close proximity to and facing toward the air supply inlet to cause combustion air from the introducing means to flow over and cool the thin-walled sleeve as it flows through the interior region of the burner housing toward the inlet end of the thin-walled sleeve.
- 32. The burner assembly of claim 31, wherein the burner housing includes a wall surrounding the side wall of the thin-walled sleeve to define channel means for distributing combustion air admitted into the interior region through the air supply inlet around the periphery of the side wall so that the thin-walled sleeve is cooled by the combustion air.
- 33. The burner assembly of claim 32, wherein the thin-walled sleeve includes only one inlet opening into the mixing region and an air-mixing plate is mounted in said only one inlet opening and formed to include a plurality of air supply apertures passing combustion air from the channel means into the mixing region.
- 34. The burner assembly of claim 33, wherein the air-mixing plate is formed to include a nozzle-receiving aperture and the supplying means includes a fuel discharge nozzle mounted in the burner housing to extend through the nozzle-receiving aperture and discharge gaseous fuel into the mixing region.
- 35. The burner assembly of claim 31, wherein the introducing means further includes a low pressure air fan mounted to the burner housing at the air supply inlet to blow combustion air at a pressure of at most 10 inches (25.4 cm) of water column into the interior region and onto the side wall of the thin-walled sleeve.
- 36. The burner assembly of claim 35, wherein the introducing means further includes a flow control valve mounted in the air supply inlet and the supplying means includes valve means for regulating the flow of gaseous fuel through the fuel discharge nozzle and linkage means for moving the flow control valve to control flow of combustion air into the burner housing in response to movement of the valve means to vary the air and fuel ratio in the mixing region.
Parent Case Info
This is a continuation-in-part application of U.S. application Ser. No. 07/909,967, filed Jul. 7, 1992, abandoned.
US Referenced Citations (9)
Foreign Referenced Citations (5)
Number |
Date |
Country |
462695A |
Dec 1991 |
EPX |
2584800A |
Jan 1987 |
FRX |
2724937 |
Dec 1978 |
DEX |
1079952A |
Mar 1984 |
SUX |
1278539A |
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SUX |
Non-Patent Literature Citations (3)
Entry |
Type CX Gas Small Diameter Tube Burner, Power Flame Incorporated Bulletin, CX-189, Rev. 789 (1989). |
Eclipse Immerso-Jet Burner, Eclipse Combustion Bulletin, Spec 330 (Oct. 1989). |
Eclipse Immerso-Jet, Eclipse Combustion Bulletin, H-80C (Sep. 1988). |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
909967 |
Jul 1992 |
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