US2457505A - Gaseous fuel burner - Google Patents

Description

Dec. 28, 1948. R. H. SOLEM GASEOUS FUEL BURNER Original Filed April 30, 1943 Patented Dec. 28, 1948 GASEOUS FUEL BURNER Robert H. Solcm, Rockford, 11L, assignor to Eclipse Fuel Engineering 00., Rockford, 111., a corporation of Illinois Original application April 30, 1943, Serial No. 485,095. Divided and this application April 13, 1944, Serial No. 530,911

1 The present invention relates generally to gaseous fuel burners. More particularly the invention relates to that type of burner which comprises a tube, one end of which is connected to receive a mixture of gas and air under pressure and the other end of which is adapted to discharge the mixture for purposes of combustion.

One object of the invention is to provide a burner of this type which comprises a flexible conduit type connection between the receiving end of the tube and the source of gas and air mixture under pressure, a water jacket around the tube, means for circulating water through the jacket in order to prevent overheating of the tube, and means for introducing a supply of secondary air to the gas and air mixture emanating from the discharge end of the tube.

Another object of the invention is to provide 7 a gaseous fuel burner of the last mentioned character in which the means for circulating water through the jacket includes a plurality of supply pipes which extend longitudinally of, and are arranged in an annular series within, the water jacket and embody discharge holes along their outer side portions for jetting streams of water against the inner surface of the outer wall of the jacket in order to wipe away the film of steam which is formed on the outer wall of the jacket during operation of the burner and thus prevent lime or other substances from accumulating on said inner surface and clogging the jacket.

A further object of the invention is to provide a gaseous fuel burner which is generally of new and improved construction and is characterized by high efliciency and durability or long life.

Other objects of the invention and the various advantages and characteristics of the present gaseous fuel burner will be apparent from a consideration of the following detailed description.

The invention consists in the several novel features which are hereinafter set forth and are more particularly defined by claims at the conclusion hereof. Y

In the drawings which accompany and form a part of this specification or disclosure and in which like numerals of reference denote corresponding parts throughout the several views:

Figure l is a longitudinal section of a gaseous fuel burner embodying the invention;

Figure 2 is a transverse section on the line 2-2 of Figure 1 and illustrating in detail the annular manifold for supplying water to the receiving ends of the supply pipes of the water circulating means; and

5 Claims. (Cl. 158-99) Figure 3 is a transverse section on the line 33 of Figure 1 and illustrating the header for supplying air under pressure to the pipes which extend through the water jacket and serve to supply secondary air to the gas and air mixture emanating from the discharge end of the tube.

The gaseous fuel burner which is shown in the drawings constitutes the preferred form or embodiment of the invention. It is designed primarily as a heating medium or instrumentality and comprises an elongated tube 5. The discharge end of the tube is provided with a nozzle 6. The receiving' end of the tube is connected by a conduit (not shown) to receive a mixture of gas and air under pressure from a suitable source. The mixture which is suplied to the tube is essentially a combustible one, although it is preferably over rich gas. The nozzle 6 at the discharge end of the tube 5 serves to discharge the mixture for purposes of combustion. It comprises a sleeve 24 which is axially aligned with the tube 5 and has the inner end thereof conected to the discharge end of the tube 5 by a screw thread connection 25. An outwardly tapered or frustoconical wall 26 is disposed in the central portion of the interior of the sleeve 24 of the nozzle 6. This wall serves to increase the velocity of the gas and air mixture and has holes 21 therein for permitting a portion of the mixture to flow outwards into the space between the wall 28 and the outer end of the sleeve. The portion of the mixture which flows outwards through the holes 21 expands in said space and serves as ignition means for the portion of the mixture that passes axially through the tapered wall 26.

In addition to the nozzle equipped tube 5 the burner comprises a water jacket 28, means for circulating water through the jacket and means for supplying secondary air to the mixture of gas and air under pressure emanating from the nozzle 6.

The water jacket 28 surrounds the tube and comprises a cylindrical side wall 29, an end wall 30, and an end wall 3 l. The cylindrical side wall 29 of the jacket is of materially greater diameter than the tube 5 and is positioned concentrically with respect to the latter. It is substantially the same in length as the tube and defines with the latter an annular space 32. The end wall 30 of the jacket serves as a closure for one end of the space 32 and extends across, and is welded to, the end of the cylindrical side wall 29 that is adjacent the nozzle 6. The central portion of the lower end wall 30 abuts against, and is welded to, the outer end of the sleeve 24 of the nozzle 8 and embodies a circular hole 33. The latter is in registry with the sleeve interior and permits discharge of the mixture of gas and air under pressure from the nozzle. The end wall 3| of the water jacket 28 serves as a closure for the end of the annular space 32 that is adjacent the receiving end of the tube 5. It extends across, and is welded to, the adjacent end water jacket 28 comprises an annular manifold 35, a plurality of supply pipes 86, and a discharge pipe 37. The manifold 35 extends around the end of the sidewall 29 that is adjacent the receiving end of the tube 5. It is connected by way of a conduit to receive water under pressure from a suitable source (not shown). The conduit comprises, an inlet pipe 58 leading to, and communicating with the manifold 36, and a flexible hose ti between the source of water under pressure and the inlet pipe db. The pipes 35 are disposed in, and extend lengthwise of, the annular space 32 in the water jacket 28. They are disposed in an annular series around the tube 5, as shown in Figure 3. The ends of the pipes 36 that are adjacent the end wall 30 are closed. The other ends of the supply pipes are bent outwards at right angles, extend through holes 42 in the cylindrical side wall 29, and are connected to, and communicate with the interior of, the annular manifold 35. Each of the supply pipes 36 is provided on the outer side portion thereof with a longitudinal series of discharge holes 63. These holes face in the direction of the inner periphery or surface of the cylindrical side wall 29 of the water jacket 28 and serve to jet streams of water against said inner periphery of the water jacket side wall 29. The streams of water emanating from the discharge holes d3 serve to wipe away the steam which forms on the inner periphery of the side wall '29 during operation of the burner and thus prevent lime or other substances from accumulating on said inner pe-= riphery of the water jacket side wall and clogging the jacket as a whole. The discharge pipe 37 is connected to, and extends radially from, the end of the cylindrical side wall 29 that is adjacent the receiving end of the tube 5. When the burner is in operation and water under pressure is supplied to the pipe 39 the water travels through the hose ti and then into the annular manifold 35 via the inlet pipe 610. From the manifold the water under pressure flows into and through the supply pipes 36 and is then Jetted in stream form outwards towards the inner periphery or surface of the side wall 29 of the water jacket 28. After impinging against the inner periphery of the water jacket side wall the water flows upwards through the space 32 and then is discharged from the water jacket via the discharge pipe 31, the hose 45, and the drain pipe 44. The water that circulates through the space 32 serves to prevent overheating of the tube and the nozzle 6 while the burner is in operation.

The means for supplying secondary air to the gas and air mixture emanating from the nozzle 6 embodies a, ring shaped header 46 and a plurality of pipes '31. The header is dispo d directly above the end wall 8| of the water Jacket 28 and surrounds the receiving end of the tube 5. It is connected to any suitable source of air under pressure by way of an inlet pipe 69 and a flexible hose 50. The inlet pipe 59 is connected to, and communicates with, the header 46, as shown in Figures 1 and 3. The flexible hose 50 is con nected to the inlet pipe 69. The pipes t1 extend longitudinally through the space 82 within the water Jacket 28 and are arranged in an annular series around the tube 5. Preferably the pipes 45 and the supply pipes 36'are arranged in alternate relation. The ends of the pipes 61 that are adjacent the receiving end of the tube 5 extend through holes 5i in the end wall 3! of the water jacket 28 and are connected to, and communi cate with, the header 66. The other ends of the pipes 41 extend through holes 52 in the end wall 30 of the water jacket and terminate adjacent said end wall. When the burner is in operation air under pressure flows into the header 46 via the hose 5G and the inlet pipe 69 and then flows into and through the pipes 61 and is discharged adjacent the central hole 33 in the end wall 30 of the water jacket 28. The secondary air emanat ing from the lower ends of the pipes 37 serves to complete combustion.

The herein described gaseous fuel burner effectively and emciently fulfills its intended purpose and is characterized by simplicity of design and long life. It is not likely to burn out and this is directly attributable to the cooling which is effected by circulation of water through the jacket 28. Because of the fact that the means for cir culating water through the jacket includes the hole-equipped supply pipes 36 there lsno likelihood of lime or other substances accumulating on the inner periphery of the cylindrical side wall of the water jacket.

The invention is not to be understood as restricted to the details set forth since these may be modified within the scope of the appended claims without departing from the spirit and scope of the invention.

This application is a division of that filed by me on April 30, 1943, Serial No. 485,095, now abandoned.

Having thus described the invention what I claim as new and desire to secure by Letters Patent is:

1. A gaseous fuel burner comprising an elongated tube having one end thereof adapted to receive a gaseous fuel mixture under pressure and its other end open for discharge of the mixture for combustion purposes, a substantially full length water jacket extending around the tube and embodying a tubular side wall around, and in spaced relation with, the tube, and end walls at the ends of the side wall, means for circulating water through the water jacket, and means for supplying secondary air under pressure to the mixture emanatingfrom said other end of the tube in order to complete combustion, embodying a pipe extending longitudinally through the water jacket and disposed substantially midway between the tube and the side wall oi the water jacket, and having the end thereof that is adjacent said one end of the tube provided with means for supplying it with air under pressure and its other end open and extending through the adjacent end wall of the jacket and terminating adjacent said other end of the tube.

2. A gaseous fuel burner comprising an elongated tube having one end thereof adapted to receive a gaseous fuel mixture under pressure and its other end open for discharge of the mixture for combustion purposes, means forming a closed substantially full length water jacket extending around the tube and embodying a tubular side wall around, and in spaced concentric relation with, said tube and end walls at the ends of the side walls, means for circulating water through the jacket, and means for supplying secondary air to the mixture emanating from said other end of the tube in order to complete combustion, embodying a plurality of pipes extending longitudinally through the jacket, arranged in an annular series between the tube and jacket side wall, and having the ends thereof that are adjacent said one end of the tube provided with means for supplying them with air under pressure and their other ends open and extending through the adjacent end wall of the jacket and terminating adjacent said other end of the tube.

3. A gaseous fuel burner comprising an elongated tube having one end thereof adapted to receive a gaseous fuel mixture under pressure and its other end open for discharge of the mixture for combustion purposes, a closed substantially full length water jacket extending around the tube and embodying a tubular side wall around, and in spaced concentric relation with, the tube and end walls at the ends of the side wall, means for circulating water through the jacket, and means for supplying secondary air under pressure adjacent said other end of the tube in order to complete combustion of the mixture emanating from said other end of the tube, embodying an exteriorly disposed header extending around said one end of the tube and provided with means for receiving air under pressure, and a plurality of pipes extending longitudinally through the jacket, arranged in an annular series between the tube and the jacket side wall, and having the ends thereof that are adjacent said one end of the tube extending through the adjacent end wall of the jacket and connected to, and in communication with, said header and the other ends open and extending through the jacket end wall and terminating adjacent said other end of the tube.

4. A gaseous'fuel burner comprising an elongated tube having one end thereof adapted to receive a gaseous fuel mixture under pressure and its other end open for discharging the mixture for combustion purposes, a closed substantially full length water jacket extending around the tube and embodying a tubular side wall around, and in spaced concentric relation with, the tube, and end walls at the ends of the side wall, means for circulating water through the jacket, embodying a plurality of supply pipes disposed for the most part within, and "extending lengthwise of, the jacket, arranged in an annular series between the tube and jacket side wall, having the ends thereof that are adjacent said one end of the tube adapted to receive water under pressure from a source of supply and provided with longitudinal series of holes for jetting streams ofwater transversely into the interior of the jacket, and means for supplying secondary air to the mixture emanating from said other end of the tube inorder to complete combustion, embodying a plurality of pipes extending longitudinally through the water jacket, arranged in an annular series benection to a source of air under pressure and their other ends open and extending through the adjacent end wall of the jacket and terminating adjacent said other end of the tube.

5. A gaseous fuel burner comprising an elongated tube having one end thereof adapted to receive a gaseous fuel mixture under pressure and its other end provided with a nozzle for discharging the mixture for combustion purposes, a closed substantially full length water jacket extending around the tube and embodying a tubular side wall around, and in spaced relation with, the tube, and end walls at the ends of the side wall, means for circulating water through the jacket, embodying a ring shaped manifold disposed around said one end of the tube and exteriorly of the adjacent end of the jacket and provided with means for receiving water under pressure from a source of supply, and a plurality of supply pipes disposed for the most part within, and extending lengthwise of, the jacket arranged in an annular series between the tube and the jacket side wall, having the ends thereof that are adjacent said one end of the tube extending through said adjacent end of the jacket and connected to, and communicating with, said manifold, and provided in the outer side portions thereof with longitudinal series of holes for jetting streams of water towards the inner face of said jacket side wall, and means for supplying secondary air adjacent the nozzle in order to complete combustion of the mixture emanating from the nozzle, embodying an exteriorly disposed ring shaped header extending around said one end of the tube disposed outwards of said manifold and provided with means for receiving air under pressure and a plurality of pipes extending lengthwise through the water jacket, arranged in an annular series between the tube and said jacket side wall and in alternate relation with the supply pipes, and having the ends thereof that are adjacent said one end of the tube extending through the adjacent end wall of the jacket and connected to the header and the other ends open and extending through the other jacket end wall and terminating adjacent the nozzle.

ROBERT H. SOLEM.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS

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