US1494651A - Oil burner - Google Patents

Description

N. E. TYRRELL May 20 1924.

OIL BURNER Filed March 20. I922 ldetent M E924 NT FFl.

Application. one must m, teas. seen at. scenes.

ers, and has for its object to produce an eihcient burner whereby perfect combustion can be had Without the noise invariably attendant upon the operation of a power burner in which gasification occurs in a confined space prior to ignition as in a pipe or retort, or where the fuel is atomized under the force \of a blast. I

It is well known that liquid burns without noise in an open pan or where otherwise unconfined, and I have discovered that efiicient combustion can be obtained with but little attendant noise, by discharging fuel in liquid form and air under pressure into an open pan located in a combustion chamber.

Another ob'ect is to produce an oil burner in which the oil is fed by gravity to a. pan located in a fire chamber and air is employed to guard against premature gasification ofthe fuel and to efiect vaporization thereof in an unconfined space in the pan.

A further object is to produce a simple, durable and economical construction, by which the above objects are accomplished, and by which the combustible -mixture thus produce is uniformly distributed radially within and radially discharged upwardly from the pan into the combustion chamber.

With the objects named in view the in rention consists in certain novel and useful features of construction and organization of parts, as hereinafter described and claimed; and in order that it may be fully understood, reference is to be had to thev accompanying drawing, in which Figure l is a vertical section taken through the burner in operative relation with a furnace;

Figure 2 is a top plan view of the burner;

Figure 3 is a top plan view of the fire pan and l Fi red is a section on the line IV-IV ofhlgureh' n lln the said drawing, where like reference characters identify corresponding parts in all of the figures, 1 illustrates a furnace of any of the common and well known types, and 2 the fuel door opening thereof, which, as illustrated, is closed by fire brick or the like, and provided with a lighting port 4. The draft u through the grate of the furnace is cut off as indicated at 5, and resting on the grate bars is a fire pan 6, the wall of which slopes upwardly and outwardly in order to direct the flame radially upward against the walls of the combustion chamber, said pan being suitably insulated as'at 7 from the grate bars, to provide a staple support for and prevent air leaks around the pan.

The fire pan is formed centrally of its bottom with a conical projection 8 on the axis of which the liquid fuel is adapted to impinge, as will be pointed out hereinbelow, and be thereby evenly distributed in all directions over the bottom of the fire pan. A series of upstanding lugs 9 provided with suitable bolt openings, are formed on the floor of the-fire pan, and each of said lugs is uipped with an extension 10 of less vvidt than the lug, as shown in the drawing to avoid unnecessary restriction of the space between the bottom of the fire pan and the periphery of the flaring-mouthed dis charge nozzle 11, said nozzle being secured in position on an air-supply pipe, hereinafter described, by means of a set screw 12. The outer periphery of the nozzle is formed with a series of perforated ears 13 for engagement by bolts 14 extending from the pan, to securely clamp and hold the nozzle upon the extensions 10. In this connection it is desirable to point out that the distance between the periphery of the nozzle mouth and the bottom of the fire pan, is such that the a'rea of the discharge opening is substantially equal to the cross sectional area of the air-supply pipe, so that the pressure of air forced through the pipe is not decreased or increased as it would be if the flow was impeded by passage through the discharge opening formed between the nozzle and the bottom of the fire pan if the space between the same was greater or less than the cross sectional area of the air ipe.

' Connects to the upper end of the nozzle 20, of the supply of air may be varied to and held in position by means of the set' screw 12; is a vertical pipe 15 communicatinglat its upper end with an-elbow 16 1n communication with a pipe 17 extending exteriorly of the furnace through the fue door closure, andterminatin m a T-c oupling 18, oneof'the branches 0 said coupling being connected to a pipe 18 leading to a blower 19, which is preferably rotated by means of a -variable s d electric motor suit conditions by means of a damper-controlled air intake 21. 1

Within the pipe 15 and terminatmg a short distance above the lower end thereof, is a gas-feed pipe 22, connected at its upper end to an elbow 23, which in turn is connected to a as-feed pipe 24 located centrally of the aireed pipe 17, and thereby insulated from the heatof the combustion chamber by the air in said pipe 17. The outer end of the pipe 24 passes throu h a bushing 25 in the third arm of the -couphng 18, and is connected to a T-couplmg 28, having. one of its arms in communication with a gas-supply pipe 27 controlled by a hand ll 11 11 t m 1 ocate centra y o e as-supp y p1 24 and spaced therefrom i n any suitab e manner is a liquid fuel or oil-supp] p1 29 which has its discharge end, pre erab y within the elbow 23, at a point directly above the point of the cone8 of the fire pan so that oil flowing from said pipe shall all directly on the cone and be evenly distributed in all directions over the bottom of the fire pan, and it will be a parent, in this connection, that the oil-supp y pi will be insulated from heat of the combustion chamber to prevent premature gasification of such fuel, by the gas-feed ipe 24 and also by the air-feed pipe 17. e pi e 29 asses exteriorly of the third arm 0 the -couplin 26 and communicates with a avity fee pipe 30 leading from a suitab e source of oil supply, a needle valve 31 being employed to control pipe 30,

The operation of the device is substantially, as follows: The as is turned on and ignited in any suitab e manner, through lighting ort 4, and as soon as the fire pan becomes ot, the oil valve is slightly 0 ned to permit of a slow flow of oil throng the pipe 29 from which it will drop thro h ipe 22, u on the hot cone 8 and be eve y distributed in all directions. This oil will be gasified upon coming into contact with the fire pan and will burn in combination with the gas flowing through the ipe 22. When the oil has gasified and is urning, the blower is. started at slow speed, 1f equipped with a variable s d'motor, or if not, t e dam r is so regu ated as to limit the air su y, and the heat of the flame upon the a 'tion of the supply of air under fices of small size and in close pressure, to t e upper end of t trance point of t pressure is greatly increased. The gas supply may now be cut off and the oil and an will be no appreciable amount of nolse.

It'will be apparent that as the oil burner embodying the invention has no jets or oriproximity to the flame, the possibility of inefliciency of operation due to incrustation of and clogv gulrg' with carbon is eliminated.

mm the above description it will be a 1 parent that I- have produced a device of t e' character described, which possesses all of the features of advantageset forth as desirawe, and while I have describedand claimed the preferred embodiment of the same, I

reserve the right to make all changes properly fallingwithinthe spirit and scope of the a 'pen (1 claims.

c aim: r

1. In anoil burner, a fire an having a central conical projection rismg from the bottom an 11 right air-supply ipe terminating at its ower endin a nozrHe disposed concentrically of and above the bottom of the an and spaced therefrom to provide a disc arge opening of substantially the same capacity as the cross-sectional area of the ear-supply pi e, means to supplly air under e air-supply pipe, an upright insulating pipe within and spaced from the air-supply ppe, and terminating short of the lower en ofthe latter, and means to drop oil down throu h the insulating pipe and upon the apex o the conical projection without contact with the said insu ating pipe 2. The com ination with a furnace having a controlled ignitionport, a fire pan within the combustion chamber of the furnace, having a central conical projection rising from the bottom, an air-supply pipe extending 1 into the furnace and terminating in a downtumed discharge end disposed centrally of and above the fire pan and provided at its lower end, withing the pin, with a flaring nozzle, concentric of the conical projection,

means to supply air under pressure, to said supply pipe, exteriorly of the furnace, at s su ply pipe extending into and spaced m t e air-supply Pipe except at the ene ormer into the latter,

and terminatin in a depending part communicating wit the air-suppl pipe near the nozzle thereof and vertical y above the said conical projection, and an oil-supply pipe extending into and replaced from the gas-supply ipe except at t 0 point of entrance of t e former into the latter, the

dischar e end of the oil-sup ly pipe bein in vertl cal alinement with the bore of th% de ending part of the -sup ly ipe so from the air-sup 1y i and terminatin tha t oil can be droppefiireotfy cite the short of the low r eii of the letter, an 10 conical projection. means to drop oil down through the insu- 3. In an oil burner, an upright air-supply lating pipe without contact with the said 5 pipe terminating at its lower end in a nozinsulating pipe.

zle, means to sup 1y air under pressure to In witness whereof I hereunto aflix my the upper end. of t e air-suggly plpe, an upsignature. right insulating pipe wit 'u and spaced NATHAN Ea TYRRELL.

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