US1640081A - Air preheater for oil burners - Google Patents

Description

A. T. JOHANSON AIR PREHEA-TER FUR OIL BURNERS Aug. 23

Filed May 21. 1924 l .air to the gases after they P at enter] Aug. 1927. v I

- UNITED, STATES.

PATENT, OFFICE.

AIDOIIPE T. JOHNSON, OI CHICAGO, ILLINOIS, .ASSIGNOB T MILTON E. PAGE, J'B.,

ADQIAPE T. JOHANSON, AND CHRISTOPHER M. FACE, ALL 01' CHICAGO, ILLINOIS, AS TRUSTEES FOB AABALL MANUFACTURING COMPANY, A COMMON LAW TRUST.

' AIR PREHEATER FOB OIL IB'UIB'NEBS.

Application a Kay :1, i924. Serial No. 714,750.

This invention pertains to improved and novel neans for supplying air to a burner, such as anoil-burner, and preferably, but not restrictedly, one-0f the rotary ty e,

-5 wherein the fuel mixed with air is ischarged under the action of centrifugal force in consequenceofwhich the fuel is well subdivided and intermixed with the air.

The present improvement relates more particularly to means for supplying heated burner, and of course before they have been wholly consumed.

The air is not only heated by the new structure but the furnace as a whole is protected from becoming induly or inefliciently heated and the fuel is burned more effectively and economically. 7 One aim and purpose of the invention is to "provide a construction of this character which is simple in structure, which is economical to produce, which maybe easily installed and removed from the furnace, and

' which performs its functions in a 'satisfac-- tory and approved manner. Y To those acquainted with this art to ful y understand the invention, both from structural and functional standpoints, in the accompanying drawing forming a part of this specification, I have illustrated a furnace e nipped with one of the new structures, t e single view of the drawing being a central vertical section of fragmentary character. 1

In other words, the picture presents only a portion of the furnace but is suflicient for the purposes of illustrating the particular invention in question.

The furnace of this illustration may be 'of any usual or suitable design, but in the present instance, I have 'de icted .a simple one of upright, cylindrical orm having an outer, doub e-wall water-jacket 10. Inside of suchfurnaceand bearing onan appropriate base or foundation, not shown, are a plurality (three in the. present instance) of upright posts or legs 11, 11 resting on which' is a dish-shaped metal shell 12- desirabl made in a p urality of sections fbolte together at 13.

f Near the ofits outside curved surace,

standing flange 14 provided for thepm'pose ave left the vthe margin of the such shell or wall member has an out-' upright annular passage of supporting a horizontal ring or annular plate 15 closing the space between the round member 12 and the inner wall of the'encasing or enclosin water-jacket.

' The top of t e ring plate 15 is covered with any suitable heat-insulating material 16 such as fire clay or its equivalent.

' At its center, this upper shell, or wall member has a round aperture 17 and out- 1 wardly beyond the margin .of this hole, the curved plate has an annular depression 18 adaptedto catch any oil from theburner and drain it away by means not shown.

a A smaller, dish-shaped shell or wall member 19, made in sections if desired, is supported from the upper member 12 and spaced below the latter by means of screws 20, 20 fastening the parts together and'extended through apertured spacing lu r 21 risin from the top I face of such ower mem r.- a

As is clearly shown, this lower, depending shell or wall is of less diameter than its companion or complementary up er shell or wall, but this need not necessari y be so as will be readily appreciated.

These cooperating upper and lower shells or walls are disposed concentrically and the under one has register with, but of less size than, the corresponding aperture in the upper member.

An annular or circular ring-member 23 has a flange 24 outstanding from its lower "margin, the outer part thereof resting on the lower shell, the undersurface of such flange conveniently and desirably having a circular head or ri 25 to maintain the member 23 in central plosition by eoaction with ole" 22. The upright cylindrical wall of the mam body of the part 23' is of appreciably less diameter-than thatof the holes or apertures 22 and 17 and it extends or pro ects up through the hole 17 and some distance above it, its top having an outstanding, horizontal, circular flange 26 of a diameter substan ally ter'than that of the o ning 17. 'l hus it will be observe that these three associated elements 12 19 and 28, the lat ter with its u per and lower flanges, form a circular, I ownwardly-directed passage between the two shells which 101118 with an through the apera central round hole 22in v ture 17 formed by thebody 28 and hat such 1 v generalpail shape, and has a top cover plate 29 spaced slightly above its upper,

circular edge forming a round discharge no'zzle or orifice 30.

The liquid fuel, such as oil, is fed up into the burner in any convenient and satisfactory mannerthrough the bore of shaft 28 which is hollow, and air is admitted into the interior of the burner to mix with the fuel through the perforations 31 in its bottom wall. e

The particular structural characteristics of this burner form no part of the present invention except to the extent in which the air is supplied thereto to carry on the combustion of the fuel.

Another supply of air flows up through the ring 23 around the burner and mixes directly with the mixture delivered through its-round discharge opening, as soon-as such delivery occurs.

As the partially-consumed mixture travels outwardly away from the rapidly revolvingv burner from which it is expelled under the action of centrifugal force, it becomes intermixed with the heated air which flows up through the tortuous conduit previously outlined formed by the twd shells and the ring member, such air abstracting heat from the metal parts withwhich, it comes in contact, thus desirably being raised in temperature and maintaining the elements of the furnace from becoming unduly heated.

It will be understood, therefore, that the burner has three supplies of air, one directly into the burner itself, a second immediately outside of and adjacent to thedischarge opening of the burner, and a third-at some distance from the burner, such arrangement of arts bringing about such distribution of t e air assuring a complete and. eficient combustion or consumption of the fuel.

The several elements of the structure are so made and associated together that they can be readily and easily installed .in a furnace and they 'can also be removed with facility and dispatch.

The ring member can be lifted up or withdrawn through the hole in the upper shell, and the two shell members may be put in place or taken out without difliculty or loss of time.

Many minor mechanical changes ma ted and upright'le an upper centr described without departure from the substance and. essence of the invention as defined by the appended claims, or, stated somewhat differently, the invention is susceptible of a variety of embodiments diflering somewhat in structural characteristics,

but all incorporating the fundamental prinspaced inwardly away from the margin of the aperture of said upper shell, and having an outwardly-extended flange above said upper shell, and a fuel-burner havinga discharge opening above said ring, whereby air flowing inwardly between said shells is caused to flow upwardly and outwardly above said upper shell where it mixes with the gases issuing and at some distance from i said burner, such air being preheated by said shells during its passage through the conduit specified.

2. In a construction of the character .described, the combination of a plurality of upright legs, an upper centrally-apertured downwardly-dished shell resting and supported on said legs, a second lower, cen-' trally-apertured downwardly-dished shell spaced below and sup orted from said upper shell, a ring inside '0? the apertures of said shells supported on said lower shell, spaced inwardly away from the mar in of the aperture of said upper shell, and aving an out-- wardly-extended flange above said upper shell, a fuel-burner having a discharge opening above said ring, means to admit air to the interior of said burner, and -means.,to

admit air between the burner and said ring to commingle with the ases as they issue from the burner, where y air flowing inupper shell where it mixes'with the gaseslssuing and at some distance from said burner, such air being preheated by said shells durin its passage through the conduit s ecified. a

3.. n a construction of the character dc-- scribed, the combination of ail-plurality of v y-apertured downwar y-dished shell resting and supported on said-1e s, a second lower, centrally-a rtured ownwardly-dished shell s aced low and supported from said upper s ell, a ring inside of the apertures of said shells, supported on said lower shell, spaced inwardly away from the margin of the aper- I ture of said upper shell, and having an outing inwardly between said shells is caused wardly-extended flange above said upper to flow upwardly and then outwardly above shell, a fuel-burner having a dischargevopensaid upper shell where it mixes with the ing above said ring, means to admlt air to gases issuing and at some distance from said the interior of said burner, whereby the air burner, "such air being preheated by said flowing inwardly between the shells is shells during its passage through the concaused to flow upwardly and then outwardly du'it pecifi d,

above said upper shell where it mixes with 5; In a, structure of the character dethe gases issuing and at some distance from scribed, the combination of an upper shell said burner, such air being preheated by having an aperture therethrough. a lower said shells during 1ts passage through the shell s aced downwardly away from said 40 conduit specified. upper shell having a smalleraperture there- 4. In a construction of the character dethrough in register with said upper aperscribed, the combination of a plurality of ture, a hollow ring member having an out- 4 upright legs, an upper centrally-apertured standing flange of less size than said upper downwardly-dished shell resting and supt re nd resting o said lower shell ported on said legs, a e ond 10w r around the margin of its aperture and havtrally-apertured downwardly-dished shell ing also an outstanding deflector flange.

s aced below and supporte fr m Said ppe above and of greater size than said upper s ell, a mug mslde o the apertures of said tu e, and a burner having its discharge shells, supp r d n said lower h spaced orifice above said deflector flange, said shells inwardly away from the margin of the aperand ring member forming an air preheatture of said upper shell, and having an outing conduit which delivers its air to the wardly-extended deflector above said upper gases issuing from and at some distance outshell, arotary fuel-burner having a discharge wardly from said burner orifice.

opening above said ring, and means to admit In witness whereof I have hereunto set air between said burner and said ring to my hand. unite with the gases as they immediately issue from the burner, whereby the air flow- ADOLPH T. J OHANSON.

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