US1712881A - Gas burner - Google Patents

Description

May 14,, 1929. c. w. GIBSON GAS'BURNER Filed Oct. 27, 1927 2 Sheets-Sheet l m mwtov (3. W. GIBSON May 14, 1929..

GAS BURNER 2 Sheets -Sheet 2 Filed Oct. 27, 1927 yEyR ATTORN EY Patented May 14, 1929.

PATENT OFFICE.

can; w. GIBsoN, or DALLAS, TEXAS GAS BURNER.

Application filed October 27, 1927. Serial No. 229,634.

Thisinvention relates to new and useful improvements in gas burners.

The object of the invention is to provide a gas burner so arranged and constructed as to produce a comparatively short and intensive flame so that when the burner is used under a steam boiler the heat will be more effective- 1y utilized under the boiler and also whereby the temperature in the stack will be reduced, thus making for more economical fuel consumption.

An important object of the invention is to project the jets of gas across the path of the air admitted to the burner, whereby the air is caused to pass through said jets prior to the ignition of the combustible mixture.

A further object of the invention is to conduct the gaseous mixture from the ets throughrestricted passages which tends to compress said mixture and to discharge and expand said mixture at the ends of the passages, whereby a more perfect combustion is had at this point and a shorter flame is produced.

An important object ofthe invention resides in the provision of an adjustable damper for cutting the admission of air to the burner and whereby the character of the flame is controlled and the burner is efliciently operated under varying gas pressures.

A construction designed to carry out the invention will be hereinafter described, together with other features of the invention.

"The invention will be more readily understood from a reading of the following specification and by reference to the accompanying drawings, in which an example of the invention is shownand wherein a Fig. 1 is a vertical sectional view of a portion of the front end of a furnace-fire box equipped with a burner constructed in accordance with the invention,

2 is a rear elevation of the burner,

Fig. 3 is a horizontal cross-sectional view taken on the line 3-3 of Fig; 2, 3 f

Fig. 1 is an elevation of t e damper,

Fig. 5 is an elevation of the supporting frame for the feed pipes, and

Fi 6 is a cross-sectional view taken on the hne 6-6 of Fig. 2.

In the drawings the numeral 10 designates a burner head and 11 a burner body-or baflie. The head comprises .uprighttubular manifolds 12 at each end connected by transverse as is best shown in Fig. 1.

The baflieincludes a jacket 14 which conforms to the contour of the head, which in the present instance is rectangular, whereby both the head and battle may snugly fit in the opening A of the wall B of the furnace fire box 0. Both the head and the jacket are made of metal and said jacket is provided with transverse bars 15 positioned in front of the burner tubes 13 and preferably of equal width with said tubes so as not to obstruct the spaces be-. tween said burner tubes." As is best shown in Fig. 3, the jacket rests against the manifolds 12 and is formed with a vertical central stay bar 16 bisecting the bars 15; :Avertical spacer bar 17 is interposed betweenthe burner tubes and the bar 16. For securing the burner head to the jacket, 3. Vertical notched clamping strap 18 is engaged with the rear edges of the burner tubes and is fastened by screw bolts 19 passing through both the strap and the bar 17 and engaging in the bar 16, as is shown in 1 vFig. 3.

The front edge of the jacket 14 is preferably flush with the inner face of the wall B, but this-is not essential. Within the jacket a baflie member 20, formed of fire clay or other material suitable for the purpose, is snugly fitted. This bafiie member is rectangular in form and is provided with transverse ducts 21, each having its forward end flared outwardly as is indicated-at 22 to promote expansion of the gases passing through the ducts and discharged into the fire box C.

The burner tubes are provided with gas escape ports 23 in their upper and lower edges contiguous to their front walls and the ports of one burner tube are disposed in staggered or alternate relationto the adjacent ports of the -correlated tube. This arrangement will cause the gas to be ejected into the spaces between the tubes in jets 'or streams which will relatively overlap and thus air passing between the burner tubes and into the ducts 21 must pass through'these gas jets or fingers. It is obvious that such an arrangement will assure a more eflicient mixture and this feature its oneof the important elements of the invenion. In the front end of the opening A a burner frame 24 is mounted with its flange 25 flush with the-outer face of said wall. This frame is provided on each side with integral collars or eyes 26 through which gas supply pipes 27 extend and are fastened by set screws 28. The gas supply pipes are screwed into collars 29 at the central portions of the manifolds 12. By this arrangement the pipes are properly supported and the burner may be adjusted to fit furnace, walls of different thicknesses and also the unit formed by the burner head 10 and the baflle 11 may be adjusted in the opening A to the desired'point. I prefer to provide each pipe 27 with a controlling valve 30 or connect them to a controlled source of gas supply so that the quantity of gas supplied through each pipe may be controlled and regulated or the supply through either pipe entirely cut off when it is desired to reduce the fire. Y

One of the important features of the burner is a rectangular flanged damper 31 havin integral collars 32 for receiving the pipes 2 whereby said damper may be slid on the pipes, a handle 33 being provided for this purpose. The damper is preferably larger than the opening of the frame 24 so as to abut-the flange 25 if desired, and thus eompletelyshut off the supply of air through the opening A.

However, under normal operating conditions the damper will be spaced from the frame 24 and the distance at which it is spaced will control the supply of air to the burner and the draft.

The burner may be ignited in any suitable way, as by placing burning paper in the opening A adjacent the burner tube 13,, or in any 0t er suitable manner. The gas jets from the ports 23 over-lappingland the spaces between the tubes13 converging, it will be seen that the air admitted through the. frame 24 will be converged and deflected into the ducts 21, after rpassin through said gas jets, where'- by a combusti le mixture will be formed. The combined vertical area of the ducts 21 bein -considerably less than the vertical area of the opening A, it is apparent that the gaseous mixture will be somewhat compressed in the ducts 21 and the constituents of said mixture will be given an opportunity to thoroughly admix while passing through said ducts.

After the burner has been in operation for a short period the walls ofthe baflle member 20 surrounding the ducts 21 will become hot so that the gaseous mixture passing through said ducts will be heated, thereby tending to expand. When this mixture reachesthe flared ends 22 of the ducts, it will be suddenly expanded and ignition .takingplace at this point, a short and intense flame will be produced. This is just the opposite of the mixing process now in common use where the gaseous mixture is compressed at the point of ignition rather than expanded. By expanding the mixture and producing a short flame, the heat is utilized while the products of combustion are passing under the boiler, to a much greater extent than if a long flame was used, and, therefore, the major portion of the heat will be absorbed which will reduce the stack temperature.

It will be noted that the burner tubes being spaced from the bars 15, a circulation of air may be had entirely around the tubes which will tend to keep the same cool and will also provide an adequate supply of air for the ducts 21. The adjustment of the damper 81 is very important and by properly setting the same, the right amount of air for producing the most eflicient flame may be admitted.

Numerous tests of this burner have demonstrated that it will not flash nor will it be affected by a down draft. On account of the generous supply of air and the passing of said air through the over-lapping gas jets, a highly combustible mixture is produced and at the same time a maximum amount of air is utilized in promoting combustion with the result that a very intensive and hot flame is obtained with a minimum expenditure of fuel.

Various changes in the size and shape of the different parts, as well as modifications and alterations, may be made within the scope of the appended claims.

What I claim, is: v

1. In a gas burner, a baflle member formed of fire resisting material, a jacket surrounding said member, said member having partitions forming spaced horizontal ducts extending therethrough, a burner head comprising transverse burner tubes provided with staggered gas escape ports in their adjacent edges discharging across the entrance to said ducts and mounted upon the jacket opposite the partitions between the ducts of the baflie member, and a damper for controlling the supply of air to the burner head.

2. Asa sub-combination in a burner head, upright manifolds at each end, and transverse burner tubes triangular in cross-section, the inclined sides of said tubes forming converging throats therebetween, the adjacent edges of the tubes at the base of the triangle being provided with gas escape ports.

3. In a gas burner, a baflle comprising a jacket surrounding a bafllle member composed of earth material and a plurality of horizontal ducts extending from front to rear, a burner head in rear of the bafile com arising opposite manifolds connected by horizontal burner tubes alined with the body of the baffle intermediate said ducts and provided with mia'ssi gas ports for ejecting gas jets across the entrances to the baffle ducts, parallel gas pipes for feeding the burner head manifolds, a support for said pipes, and a damper slidable on said pipes.

a. In a gas burner, a baffle comprising transverse partitions forming ducts a burner head having transverse tubes opposite said partitions and formed with gas outlets discharging across the entrance to said ducts, and means for supplying air in advance of said burner head.

5. In a gas burner, a bame comprising transverse partitions forming ducts, a burner head having transverse tubes abutting said partitions and formed with gas outlets discharging across the entrance to said ducts, means carried by the baffle-and embracing the tubes for supporting them in relation to the ducts, means for supplying air in advance of said tubes, and a damper controlling the air supply.

6. In a gas burner, a bafflemember having transverse ducts, a burner head having spaced transverse burner tubes disposed between said ducts and formed With inclined faces disposed toward the inlet and a Hat face abutting said bafile, some of said tubes having opposite ports at said flat face for ejecting jets of gas across the transverse ducts.

7. In a gas burner, a battle including a series of ducts, and a burner head having parallel tubes extending transversely to said ducts and formed with staggered outlets for discharging relatively over-lapping jets of gas Without impinging across the entrance to said ducts, and means for supplying air in advance of said gas jets.

In testimony whereof I athx my signature.

EARL W. GIBSON.

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