USRE17454E - Furnace - Google Patents

Description

Reissued Oct.. 8, 1929 f UNITED STATES PATENT voI-l-lcra HORATIO S. BENNETT, OF CLEVELAND, OHIO, ASSIGNOB, BY MESNE ASSIGNMENTS, `I.1.'0 THE COLUMBIA BURNER COMPANY, A CORPORATION 0F OHIO ruim-ACE Original No. 1,216,928, dated February 20, 1917, Serial No. 588,725, led October 24, 1910. Application forl r reissue led August 8, '1929. Serial No. 384,309.

In the furnace industry it has been cus- Y tomary at the present time to employ practically one't pe of burner, wherein the lower part of the e-pot at or near the grate is en- 5 tirely or partially sealed with the burners arranged above the same and in a manner to project their flames against the inner surface of the fire-pot, all the air to support 'combustion and to form the mixture for thel burning Vops eration being furnished through the mixers of the several burners.y This quantity of air is insuliicient at any time to produce complete combustion of the gas, even when a goodmixture is formed Within the burner itself, so that when the bottom of the fire-pot is closed, 'there is no additional air to support combustion in the furnace, anda great deal of unburnt gas flows out through the stack.` This is especially true in natural gas burners for in some instances, it has been an actual fact that a flame could be sustained at the top of a chimney with a burner of this type showing that a large volume of the unburnt gas passes out Nat this point.

It is the object of the present invention; therefore, to provide a burner which is free and open at the bottom and is 'used in conjunction with a spreading device or striker y plate arranged above the burner and adapted at the same time to restrict the iiow of the burning mixture and air at a point adjacent to the fire-pot and above the burner, thereby t preventing the loss of vunburnt gas or in other words producing complete combustion at this point and raising the heat yield of the fuel.`

In actual ractice the applicant, who is engaged in t e manufacture of furnaces and burners, has' found thatwi-th his burner there is a greaterheat yield for a small consumptionfof fuel due to his construction. y

Itis also .one of the principal features of .this invention to use in conjunction with this` arrangement. a burner supplying a substantially `continuous llame around the entire nimmer, thereby preventing the free passage of unheated airbetweensections of llames produced by the severalburner sections. In this way all Vair passing up into the heating l 5 drum is heated to a high temperature.

. characteristics, but I have shown one formin to direct the flames toward the lfire-pot and "of connection between the parts thereof and Fig. 4 is a view showing a furnace with parts broken away to show the invention applied thereto. n A

In carrying out my invention any preferred form and construction ofyparts may be em-r ployed so long as they possess the necessary the drawings which is highly effective in operation, and in such'embodiment l represents ythe grate and 2 represents the fire-pot both of which are of any ordinary construction, and, as usual, are inclosedin a casing or jacket a having a firing door b, and ash pit o provided with a door ,'and a dome e" above-said fire-pot leadin to the customary heating drum (not shown which may be of any suitable construction, fo'r'example, of the form shown in the patent to Schaffer No. 675,978', granted June 11, 1901. In mounting the burner I f prefer to employ an annular ring 3 which rests upon the open grate and supports the device. The burner which' rests uponthis u ring consists of a main cast gas receiving or supply chamber preferably comprising half-- round portions 4 and 5 each of which is. semi. circular in form and has upon its periphery a ange 6 and suitable openings 7 for receiv-A ing nipples 8 upon which the burner sections [are mounted. v Each of these half round gas receiving chamber portions is provided with a gas inlet connection 9 which leads to suitable source of' supply. Mounted upon the end of each nipple 8 is a jet nipple 10 having a gas -oriiice 11 therein and-connected by lsuitable Webs 12' with a mixer 13 integralwith and forming a part of a'mixing tube 14 upon the end Ot which is a mxingpasing member 19 plate is still further providedwith an inwardly beveled face portion 19 extending to an outwardly inclined or beveled face portion 2()- which is provided with a group of gasV orifices 21. The edge of .this burner plate seats against the shoulder formed by the flange 16 and it is held in place by two screws 22 which pass through the casing member 15, through the mixing chamber and into-threaded openings in the plate 17. The arrangement of the parts is such that air envelops each of the burner heads and supports combustion. .In this Way the flames are supplied with an ample amount of air for taking care of combustion. The burner sections are also arranged so that they form a continuous fiame around the burner thereby heating all of the passing air.

In order to retard the flow of the burning mixture and air and thereby to insure vcomplete c-ombustion and further in order to cause the flames to impinge directly against the firepot a suitable spreading or striker plate is provided, and itis composed of semi-circular members 23 and 24 which fit the two half receiving chamber sections and rest upon the flanges 6 at the center. A suitable semi-circular opening 25 is provided at the center Vof each of these members and for accommodating the gasreceiving chamber as above out-l lined. These half-sections are each provided with a -downwardly extendingflange 24 which rests on the mixing tubes 14' and are secured together by lugs 26 provided with openings 27 engaging pins 28 secured in the plates. The arrangement o-f this lug-andpin construction is such that there is a lug carried by each plate on the opposite side of the center with a pin opposite, so-that when the plates are placed in their straight edges edge to edge and moved slightly out of the same plane, the lugs may be brought down upon the pins so that the spreader will be locked together upon the gas receiving chambers Each half of this spreading plate is provided with an upwardly inclinedA portion 29 terminating in a vflat edge portion 30 which extends over the burner heads andtoward the fire-pot and serves to retard the flow of burning gas and air and to direct the flames against the surface of the fire-pot. By this arrangement the greatest ossible' amount of heat is obtained from the uel.

In operation, the flame produced -by the burner sections rises in a substantially continuous formation around the furnace against the striker .'plate, and is thereby directed against the fire-pot when the'heat of the flames will cause an upward circulation of air which enters'freely through the grate and passes up through and with the flames, thev now at the periphery of the striker plate and between it and the fire-pot being so retarded or restrictedthat complete combustion is produced, and all the air entering the drum is thoroughly heated and none is permitted to pass between the sections of flames unheated.

By constructing a burner in the manner set forth and supporting it upon the ring 3 which rests on the grate it may be disassembled and removed from the furnace readily to permit the use of solid fuel, the parts being such that l 2. In a furnace, a nre-pot, a striker plate l means mounted therein and having its edge terminated at a point near the fire-pot wall, and a burner structure having burner orifices Ywhich project their flames against the striker plate means and thence through the space between the edge of the srtiker plate means and the 'fire-plot wall, said means preventing air`from passing up through the lire-pot other than through said space.

,3. vIn a furnace, a clrcular fire-pot, a striker plate having its periphery extending to a point near the fire-pot, a burner comprising a plurality of sections eachv having a burner head with a group of burner orifices for projecting: flames against the underside and near thel periphery of the vstriker plate and another group of burner orifices for projecting flames directly against the fire-pot.

4, In a furnace, a fire-pot, a burner sup-y ported near its bottom and comprising a plurality of burner sections each having a horizontally disposed group of discharge orices for directing the flame against the fire-pot and a group of discharging orifices directing the flame upwardly, and a ystriker plate above the-burner land having its periphery extending near the fire-pot above the last named burner orifices, said orifices producing a substantially continuous flame around the entire burner.

5. In a furnace, afire-pot, a burner supported near-the bottom of the fire-pot and 'i comprising a plurality of burner sections each having ahead provided with 'a horizontally disposed group of discharge orifices for directing the flame, against the fire-pot,`

and a group of discharge orifices directing the flame upwardly,.a striker plate above the burner and having its periphery near the` :fire-pot above the last named orifices, said orifices producing a substantially continuous Haine around the entire burner, and a down- Wardly extending flange carried by the striker plate and supported upon the burner adjacent the burner heads.

6." In a furnace, a ire-pot, a burner supported near the bottom of theire-pot and comprising a plurality of substantially rectangular burner sections each having a horizontally disposed group of discharge orifices for directing a substantially continuous flame against the fire-pot and a group of discharge oriiices directing a substantial y continuous Harrie upwardl ,and a striker plate covering the burner an having its periphery extending near the fire-pot above said last named discharge oriiices.

7 `In a furnace, a fire-pot, a striker plate means mounted therein and having its ed e terminated at a point near the fire-pot wa l, and a burner structure having burner oriiices which project their iames against the fire-pot Wall and thence through the space between the edge of the striker plate means and the irepot wall, said means preventing air from passing up through the fire-pot other than through said space.

In testimony whereof I have hereunto signed my name to this s ecification.

HORATI S. BENNETT.

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