US1938335A

US1938335A - Combined gas and oil burner

Info

Publication number: US1938335A
Application number: US227402A
Authority: US
Inventors: Hubbard Norman; Matthias S Gerend
Original assignee: Babcock and Wilcox Co
Current assignee: Babcock and Wilcox Co
Priority date: 1927-10-20
Filing date: 1927-10-20
Publication date: 1933-12-05
Anticipated expiration: 1950-12-05

Description

Dec. 1933- N. HUBBARD El AL 1,938,335

COMBINED GAS AND OIL BURNER Filed Oct. 20, 1927 5 Sheets-Sheet l Dec. 5, 1933. N, HUBBARD -1- AL 1,938,335

COMBINED GAS AND OIL BURNER Filed Oct. 20, 1927 5 Sheets-Sheet 2 Fig; Z

2 jwgfi/ INVENTORS hmu J JMATTORNEYS 5, 1933. N. HUBBARD ET AL COMBINED GAS AND OIL BURNER Filed Oct. 20, 1927 5 Sheets-Sheet 3 INVENTOR5 DEC. 5, 1933. N HUBBARD r AL 1,938,335

COMBINED GAS AND OIL BURNER I )nmJW INVENTORS" J BY x b I ATTORNEYS Dec. 5, 1933. HUBBARD r AL 1,938,335

COMBINED GAS AND OIL BURNER Filed 001;. 20, 1927 5 Sheets-Sheet 5 Fig; 7

M Y W )1 JM INVENTORS ATTORNEY5 @atented @ee. 5, 1933 masses coivmrnsn GAS Ann on. BURNER Norman Hubbard, Elizabeth, N. 3., and Matthias S. Gerend, San Francisco, Calif., assignors to The Babcock & Wilcox Company, Bayonne,

N. 1., a cerporation of New Jersey Application @ctober 2t),

13 (Claims.

This invention relates to a fuel burner by means of which either gas or oil or both may be burned, and will be understood from the description in connection with the accompanying drawings in which Fig. 1 is a front elevation partly broken away; Fig. 2 is a longitudinal section through the device; Fig. 3 is a section along the line 33 of Fig. 4; Fig. 4 is a front view of one of the details; Fig. 5 is a longitudinal section on an enlarged scale showing another detail; Fig. 6 is an end view of Fig. 5; Fig. 7 is a section similar to Fig. 2 showing some of the parts in diiferent positions, and Fig. 8 is a side elevation of an oil burner element.

In the drawings reference character 10 (Fig. 2) indicates the boiler front that is lined on the furnace side with tile or brick 11. A metal cone l2 fits into an opening 13 in the boiler front, and may be provided with radially extending plates 2@ or guide vanes 14 that are inclined at an angle to the axis of the cone. A lip or bead 15 is pro- Vided on the outside of the cone 12 at its inner end and bricks 15 that may be radially mounted on the cone are provided with notches or slots to fit over the lip 15 to keep the same in place. The lip or bead 15 is provided with a slot 15' or interrupted portion for a short distance circumferentially at its upper side so that the brick or tile 15 can be installed even with the circumferential row of tile 11 in place, by bringing the brick or tile 16 to a position opposite the notch 15' and slipping them into place in a direction perpendicular to the boiler front 10, the tile 16 being moved in a circular path around the lip 15 until a ring is completed. The reverse operation is performed to remove the tile 16.

A cylindrically shaped air chamber, here shown as an air register 17 is slidable into position along guide rails 18 in front of the cone 12. The guide rails 18 are attached to the boiler front 10. A cover plate 20, circular in shape, is provided at the outer end of the register 17 and carries on the front face thereof a shield 21 spaced a short distance from the cover plate. The cover plate is attached to the flange or rim 23 of the register 1'7 by means of bolts 22. A ring 25 having a toothed segment 26 is revolubly mounted on the annular flange 27 -0f the cover plate 20. A pinion 28 on a shaft extending between the plate 20 and shield 21, meshes with the toothed segment 26 and ,is providedwith a handle 29 by which the pinion may be revolved. The inner edge of the ring 25 (Fig. 1) is provided at intervals with slots 30 into which the inturned ends of pivoted rods or arms 31 extend. These piv- 1927'. Serial No. 227,4492

oted arms 31 carry slightly curved air doors 32 which, when turned to their outermost positions, constitute part of the cylindrical surface of the air register 17. By revolving the pinion 28, the ring 25 is turned, thus swinging the arms 31 and moving the doors 32 to different positions, thus adjusting the sizes of the air openings through the register. A ring 25' may be attached to the plate 20 and spaced therefrom to protect the air door mechanism somewhat from the heat of the furnace. The side wall 33 of the air box that communicates with the register 17 is provided with a circular opening 34 that is large enough to permit passage therethrough of the cone 12 and register 17, but is smaller than the cover plate 20. When this cover plate 20 is brought into contact with the wall 33 of the air box, the flange of the cone 12 is pressed against the boiler front 10 with the air register 17 in place between the cone 12 and cover 20. The cover 20 may be clamped to the wall 33 to form an air-tight joint by means of the bolts 35 and nuts 36. The ends of the guide rails are provided with flanges that are attached to the side wall 33 and the boiler front 10.

A circular cover 38 is revolubly mounted at the.

center of the cover plate 20 and is provided with a flange 39 that fits against the annular flange 27 on the plate 20, these flanges. being so shaped as to provide a conical seat. Radially positioned dogs '40 (Figs. 3 and 4) are provided at opposite edges of the cover 38. The inner ends of the dogs are attached to the cover by means of. the holts 41 and the outer ends extend slightly beyond the edge of the cover. Handles 42 areattached to the flange of the cover and the reduced ends 43' thereof extend through the cover and are threaded to extend into corresponding threaded holes in the dogs 40. Notches 45 are provided along the inside edges of the opening 44 that is surrounded by the flange 27 of the cover plate 20. These notches 45 are of sufficient depth to permit the passage therethrough of the extending ends of the dogs 40. After the dogs 40 pass through the notches 45, the cover 38 can be turned slightly to lock the same in place. Stops 46 are provided on the backside of the plate 20 to limit the circumferential movements of the dogs 40. The cover 38 carries a central hub or bearing 47 and a peep hole 48 is provided for the cover.

A tube 50 (Figs. 2, 5 and 7) extends through and fits closely within the hub 47 and is long enough to extend into the cone 12 when the parts are in place. The ends of the tube 50 are threaded as shown at 51 and 52. A tube 53 sufficiently smaller than the tube to leave an annular space between the tubes when they are concentrically mounted, is provided with a threaded end 54. A hollow member is provided with threaded holes on opposite sides, into .which holes the threaded ends of the

tubes

50 and 53, respectively, are screwed. The hollow member 55 is also provided on its lower side with a screw threaded opening 56 into which a pipe 57 is screwed. The pipe 57 is provided with a three-way valve 58 so that communication from this pipe can be established either with the gas pipe 59 or an air pipe 59'.

A gas burner 60 (Figs. 2 and 5) is screwed upon the threaded end 52 of the pipe 50. The side of the gas burner 60 opposite the screw threaded portion fits tightly around the end of the tube 53 that projects beyond the threaded end of the tube 50. The annular rim of the burner 60 is provided with a plurality of holes 61 or an annular slot at an angle of approximately 60 to the axis of the tube 50.

' An oil burner tube 62 (Figs. 7 and 8) extends through the tube 53. This oil burner tube is of the well known type that is provided with a spray at the inner end. When the tube 62 is in'place, it may be held securely by means of the yoke 63 that is pivoted at 64 and has a tightening bolt 65 that contacts with an extension on the tube 62, as most clearly indicated in Fig. 71

An air deflector 68 that is somewhat conical.

in shape and is provided with struck in plates 69 to give a swirling motion to the air that passes therethrough, is slidably mounted by means of the sleeve 70 upon the tube 50. A handle '71 that may be pivoted at 72 extends from the sleeve 70 through a hole 73 in the cover 38.

The operation is as follows: The air doors 32 of the air register 17 are adjusted to the desired positions by means of the pinion 28 to give the proper amount of opening for the entrance of air from the air box. The air entering through the register 1'7 then passes through the cone 12 and is given a whirling motion by the deflecting plates 14. When gas alone is to be burned, the three-way valve 58 is turned to open communication with the gas supply pipe 59, whereupon the gas passes through the pipe 57 into the hellow member 55 from which it passes through the annular space between the

tubes

50 and 53, thence ovt,. of the holes 61 of the gas burner 60, where 'it i commingled with the entering air, passing through the cone 12. When oil is to be burned, it is admitted through the oil burner 62 and is sprayed into the air that passes into the furnace through the cone 12. When oil is being burned, the three-way valve 58 may be turned to admit air through the pipe 59, which passes through the annular space between the

tubes

50 and 53, thus aiding in keeping the oil burner cool. However, gas instead of air may be admitted through this inlet space from the gas pipe 59 while oil is passing through the oil tube 62, thus enabling a mixture of gas and oil to be burned. Also when the fuel is changed from gas to oil, or vice versa, the/ignition of the new fuel can be effected from the fuel that is about to be shut off. When gas alone is being burned, the

can be removed by loosening the nuts 19 without disturbing the boiler front 10 or the wall 33 of the air box, and can be replaced by sliding the same along the guide rails 18 and tightening the nuts.

The

tubes

50 and 53 through which the fuel is introduced, can be quickly removed and replaced by turning the cover 38 a short distance circumferentially to permit the projecting ends of the dogs 40 to pass through the notches 45. The brick 16 can be installed or replaced without entering the furnace after the cover 38 and the parts carried thereby are removed.

The invention is suitable not only for burning gas and oil or a mixture of the two but also for burning other liquid or gaseous fuels or powdered coal or other solid fuels that are suspended in a gas.

We claim:

1. In a fuel burner, tubes for oil and gas one of which is within the other, a hollow member to the opposite sides of. which said tubes are connected at one end, an air register through which said tubes extend, means for regulating the amount of air entering said register, said means comprising pivoted doors and a revoluble ring for operating said doors, and a plate for supporting said tubes, said register being connected to said plate.

2. In a fuel burner, an air register, means for retaining said air register in proximity to an opening in a furnace wall, and means for projecting different fuels through said opening, said first named ineans comprising guide rails that extend outwardly from said furnace wall.

3. In combination, a furnace wall having an opening therethrough, a fuel burner having an air register larger in diameter than said opening, an air box with an opening for said register to pass through, a' cover for said opening, fuel feeding means supported by said cover, and means mounted on said cover for regulating said air register.

4. In combination, a furnace wall having an opening therethrough, a fuel burner having an air register larger in diameter than said opening, an air box with an opening for said register to pass through, a cover for said opening, fuel feeding means supported by said cover, and an air deflector mounted on said fuel feeding means.

5. In combination, a furnace wall having an opening therethrough, a fuel burner having an air register larger in diameter than said opening, an air box with an opening for said register to pass through, a cover for said opening, and fuel 130 feeding means supported by said cover, said fuel feeding means comprising tubes one of which is within the other said tubes being separately-removable.

6. In combination, a furnace wall having an 135 opening therethrough, a fuel burner having an air registr larger in diameter than said opening, an air box with an opening for said register to pass through, a cover for said opening, fuel feeding means supported by said cover, said fuel feed- 140 ing means comprising tubes one of which is within the other, and a hollow member to which said tubes are attached.

7. In combination, a furnace wall having an opening therethrough, a fuel burner having an 145 air register larger in diameter than said opening, an air box with an opening for said register to pass through, a cover for said opening, fuel feeding means supported by said cover, said fuel 150 feeding means comprising tubes one of which is assesses within the other, and a gas nozzle attached to one of said tubes.

8. In a fuel burner, an inlet for a furnace wall, and a flange on said inlet, said flange being provided with a notch whereby tile may be applied to the outside of said inlet by a movement substantially parallel to the axis of said inlet.

9. In a fuel burner, a conically shaped inlet for a furnace, an exterior flange on the outside of said inlet for holding tile, said flange being provided with a slot for installation and removal of the tile.

10. In a fuel burner, an air chamber, means for retaining said air chamber in proximity to an opening in a furnace wall, and means for projecting different fuels through said opening,- said first-named means comprising guide rails which extend outwardly from said furnace wall.

11. A furnace wall combination fuel burner arranged to discharge through a furnace wall opening and comprising casing means forming an air chamber at the outer end of said wall opening, a circular series of whirling vanes mounted in the outer portion of said wall opening, a fuel supply pipe having means for effecting a diverging fuel discharge therefrom adjacent the inner end of said series of whirling vanes, and a second fuel supply pipe having means for effecting a diverging fuel discharge therefrom also adjacent the inner end of said series of whirling vanes, whereby a substantially similar mixing of the fuel from each supply pipe with the whirling air stream can be effected.

12. A furnace wall combination fuel burner arranged to discharge through a furnace wall opening having a converging outer portion and comprising casing means forming an air chamber at the outer end of said wall opening, a circular series of whirling vanes mounted in the converging portion of said wall opening, a fuel supply pipe having means within and adjacent to the inner end of said series of whirling vanes for effecting a diverging fuel discharge therefrom, and a second fuel supply pipe having means within and adjacent to the inner end of said series of whirling vanes for effecting a diverging fuel discharge therefrom, whereby a substantially similar mixing of the fuel from each supply pipe with the whirling air stream can be effected.

13. A furnace wall combination fuel burner arranged to discharge through a furnace wall opening having a converging outer portion and comprising casing means'forming an air chamber at the outer end of said wall opening, a circular series of whirling vanes mounted in the converging portion of said wall opening, a fuel supply pipe having means for effecting a diverging fuel discharge therefrom adjacent the inner end of said series of whirling vanes, a second fuel supply pipe having means for effecting a diverging fuel discharge therefrom also adjacent the inner end of said series of whirling vanes, and a ventilated air deflector centrally arranged in said wall opening adjacent said points of fuel discharge. whereby a substantially similar mixing of the fuel from each supply pipe with the whirling air stream can be effected.

NORMAN HUBBARD.