US1618486A

US1618486A - Heating furnace

Info

Publication number: US1618486A
Application number: US486505A
Authority: US
Inventors: Sklovsky Max
Original assignee: Deere and Co
Current assignee: Deere and Co
Priority date: 1921-07-21
Filing date: 1921-07-21
Publication date: 1927-02-22
Anticipated expiration: 1944-02-22

Description

Fat 22, 1.927.

M. SKLOVSKY HEATING FURNACE Filed July 21, 1921 "M g M? m A. 7 f U M a z w 7 ww W W Mann 5 Patented Feb. 22, 1927.

* UNITED STATE S PATENT OFFICE.

MAX SKLOVSKY, 0F MOLINE, ILLINOIS, ASSIGNOR T0 DEERE & cOIvIrANY, OF IvIOLINE,

ILLINOIS, A CORPORATION OF ILLINoIs. I

HEATING FURNACE.

' Application filed. July 21, 1921. Serial No. 436,505.

My invention relatesto heating furnaces in which liquid fuel is used, and has particularly to do with furnaces of the type shown and described in my application, Serial No. 367,152, filed March 19, 1920, Patent Number 1,591,891, in which fuel oil is carried into the combustion chamber of the furnace through the agency of a stream of air under pressure passing through a Venturi nozzle to which the oil is supplied. The resultis that the oil in the form of a fine mist intimately mixed with air is injected into the combustion chamber.

In furnaces of this type the amount of fuel. required depends to some extent upon the nature of the work that is being done by the furnace, or the conditions under which it is being Operated, and, therefore, in order that air and oil may be delivered to the combustion chamber in proper proportions to secure the best results under all conditions, it is desirable that means be provided for varying the volume of air supplied as well as the quantity of fuel oil, but as the breaking up of the fuel oil delivered by the Venturi nozzle into a fine mist preliminarily to its subsequent vaporlzationin the combus tion chamber depends upon the velocity of the air at the pointin the nozzle Where it takes up the oil, it is of vital importance that any variation of the volume of the air supplied be efiected without materially affecting the velocity of the air point where it meets the oil. This will be readily appreciated when it is borne in mind that in a Venturi nozzle like that shown in my said application thefuel oil inlet is located at the smallest diameter of the noz zle in order to utilize the velocity of the air at that point to shear off the oil andbreak it up into fine particles as it leaves the inlet duct-and comes into contact with the stream of air flowing at highv velocity. Obviously, therefore, if the volume of air supplied should be regulatedby an ordinary valve located in the air line in advance of the Venturi nozzle, decrease of the Volume of air supplied would result in a lessening ofthe velocity of the air,,and consequently would lessen its shearing or breaking up effect upon the oil, which would interfere with its proper intermixture with the air, and prevent or retard proper vaporization thereof in the combustion chamber. To

' avoid this objectionable result and to prostream at the vide means by which the volume of air passing through the Venturi nozzle may be regulated as required without varying its effec'tive velocity, by which I mean itsvelocity at the point where the oil is taken up by the air stream, is the principal object of my present invention. A further object is to provide means for regulating the volume of air in the manner" indicated, which will also permit the operator to visually inspect Y the operation of the apparatus while it is in use, so that he may see whether or notit is trolled showing part of the operating lever there-v for.

Referring to' the drawings,5 indicates a fuel oil consuming furnace, and 6 the combustion chamber thereof. In one of the end walls of the furnace is an opening 7 through which the materials to be heated may be introduced, said opening being arranged to be 7 closed by'a door 8. In the construction illustrated, said door isadapted to slide vertically in suitable guides, and is operated by alever 9 connected therewith by a link 10. 11 indicates an air heater of any suitable description adapted to employ the waste gases of the furnace to heat the air delivered thereto, which is located over a discharge passage '12 V chamber. 13 indicates an air supply pipe which is connected with a fan or other means of supplying air under pressure, and communicates with the air heater 11. [1 1 indicates an air pipe which leads from the air heater 11, and supplies air to a Venturi 1102- 1 zle 15 mounted in the end wall of the furnace opposite that containing the opening 7 at the top of the combustion' As best shown in Fig. 2 the Venturi nozzle 15 is provided atits narrowestpoint with a circinnlerential channel 16 which opens into the bore of the nozzle at its narrowest point through a duct or minute ori'l'ice 17 located at the upper side of the nozzle. 18 indicates an oil supply pipe which conununica'tce with the channel 16 for supplying oil thereto, an id oil supply pipe being provided with a! valve 19 at any convenient point for regulating the oil Supply. Above the orifice ll' is an opening adapted to he cloeed liy a screw plugQO, through which opening said oriliee may he conveniently cleaned when necessary.

21. indicates a (llnjllhlugill located in the combustion chandler adjacent to the diacharge point. of the nozzle I15, and provided with a central pr throng-ll which the finely divided irurrtiire of air and oil are introl'luced into the mnnhustiou cl'raniher.

T he ap 'airatua an than 'lar described substantially the smile as that shown and dcseriliedin my said pending applicatiorn and, therefore, it will. sillliec for present purpooes to explain hrielljx that its purpose in to cllect the injection ot a mixture ol' finely divided lucl such an luel oil and air, either hot or cold, at hiirlyvehuritv into the collationlion clialnher ol the Furnace, utilizing the inoinentuni oi. the iueoniing air and fuel to cause a circulation in the coinhuetion chainher oi the products ol, previous conllnaaliiin therciin hjv which ouch products of eoinlluw tion will he tnou tht into intimate aaeociation with the incoininlr luel inixture helorc eonihnation thereof in at-coin;ilinhed. Jive thesevprmlucls ol coinlmstion are vcra hot, the instantly raise the incoming fuel to a high temperature so that it is graailicd and ignited. The intiiuatc association ol the highly heated grasilied fuel and the air, which are supplied in the proper proportions to el'lect suhstanliallg perfect COllllJllS- tion', together with the circulation of the mixture in the combustion chamber, ensures the complete, perileet, and sullstantiall instantaneous coniluietion ot" the fuel without aet so that very high temperatures can he very quicltly obtained.

Corning now to the iuiproveineuts which term the subjectmatter ol? the present applieation. and which as has been explained. have to do principally with the 'n'ovision ol mcane by which the volume of air supplied may he varied without nniterially varying the ell'ectivc velocity ol the air strca1n,-9l indicates an air regulating valve in the iorni of a plunger, which is 1nelerahly tubular, as best shown in Fig. This valve is mounted to slide ttr-lescopieallv in a hearing 2% alined with the axis of the nozzle 15. so that said valve ma he moved longitudinally of Such axis. As best shown in Figs. 2 and 3, the inner end of the valve 23 tapered or inclined at its upper side, and its inner end portion hears upon and is slid-ably eupmrtcd in the inner surface of the constricted portion of the nozzle opposite the inlet orilice lT. That portion of the inner wall of the nozzle 01 ipoeitethe inclined portion of the valve Sill is cor-res])ondingly inclined, in order that there will not he a restriction in the croaa eeetional area of the pzuaaigeway i5, through which the air from the air supply pipe 14, in its; course through the nou zle, p. heter it reaches llie (-(niatricted portion at the nozzle wherein the oil aria. orilice l is located. Obviously, the area of said paseago and its: opening in the comment ed portion of the nozzle may be increased luv moving; the. valve 213 to the lelt froarthe position shown in Fig. dared lrv moving; said valve in theln posilc direeliorn and it is; evident that by properly varying the size o'li such opehing at the conatricteill portion oi thenozhlc it in possible to maintain the stream or air [lowing tllci'ethrough at a auhatznitially unil'orrn' velocity uotwithetinuliug any increaler or (terror-tee ot air dillivert'id through the the volume ol nozzle. liy this corurtruction, there tore, the

volume ol air may he prolun'lv regulatl-atlo aware the lllUHl cll'eetivc n lure, wlletlulu' the supply o'l oil he inereae dii'ninisli' ed, \vitliout in any manner inl'lwt'ering with its function oil atolnizing and taltiilg up the oil. hor conveniently adjueti the poailion ol the valve .933, it prcn'idcd end with a collar it; having pine 2T atits opposite sides. Tlleac pins operate in sloth 1a in an narrating lever '12!) llilvlllg an intermediate voice 3t) between the nielnlicrn ol which the collar Eli litted. Pre'lerahl i', the lever :21] in 'liulcrnlned' on a: pivot ill. carried by thenoznmuuted on a bracket E552 zle 15, as shown in Fig. J LS has been segue heed, the valve 523 is preferably tubular the object of which con extraction in to permit the operator to visaallv inspect the oil feed. In furtherance of this ohjeet the inner end of the valve 13 provided with a plug 523* tapered to conilorin to the taper ot the valve. a longitudinal passage the oil feed. The outer end olithe vtllvcQf-l is closed hy a window il -l of ohm or other eui nhle transparent material, which is titted over the end oi the valve and is held in place hv the collar 2d. as shown in Fig. ell lly this means the observer, 11v looking through the window Sal, may see and provided with at its miter whether or not the oil is being properly dropped into the nozzle and atomized hy the air strean i.

So far as 1 am aware, I am the first in the art to n'ovide a: fuel oil consuming rarnace en'1plo3*inr a high velocity stream of air U) deliver the oil to thecoinhuetion chain'- luer. with means hy which the volume of air may he regulated without materially altering the effective velocity of the airpand,

therefore, the claims hereafter made are to be construed generically, except in so far as they may be directed to specific'features of the construction shown and described. The term oil as herein used is intended to include any and all suitable liquid fuels, and by the term compressed air I mean any suitable gas supplied at a velocity high enough to properly effect the delivery of the fuel.

What I claim as my invention and desire to secure by Letters Patent, is-

l. A spray burner comprising a Venturi nozzle, means for supplying air under pressure to said nozzle, means for admitting fuel oil to the air stream flowing through said nozzle at the constricted portion thereof, a manually-operable valve movable'into and contacting with the inner surface of the nozzle at the constricted portionthereo-f opposite the point of admission vof theoil into said nozzle to vary the area of the air passage therethrough, and means operable to adjust the position of said valve.

2. A spray burner comprising a Venturi nozzle, means for supplying air under pressure to said nozzle, means for admitting fuel oil to the air stream flowing through said nozzle at the constricted portion thereof, a manually-operable tubular valve supported by and movable into the constricted portion of said nozzle adjacent to the point of admission of the oil thereto to vary the area of the air passage therethrough, and means operable to adjust the position of said valve.

3. Aspray burner comprising a Venturi nozzle, means for supplying air under pressure to said nozzle, means for admitting fuel oil to the air stream flowing through said nozzle at the constricted portion thereof, a manually-operable valve having a tapered inner portionmovable into and contacting with the constricted portion of said nozzle, and cooperating therewith tovary the'area of the air passage therethrough adjacent to the point of admission of'the oil and means operable to move said valve.

l. A spray burner comprising a Venturi nozzle, means for supplying air under pressure to said nozzle, means for admitting fuel oil to the air stream flowing through said nozzle at the constricted portion thereof, a manually-operable valve telescopically mounted in said nozzle, one end portion of said valve being mounted in and extending outside of said nozzle and the other end portion thereof being tapered, the tapered portion of said valve being movable into the constricted portion of said nozzle for varying the area of the air passage therethrough and means operable to move saidvalve.

5. A spray burner comprising a Venturi nozzle, means for supplying air under pressure to said nozzle, means for admitting fuel oil to the air stream flowing through said nozzle at the constricted portion thereof, and a manually-operable valve telescopically mounted in said nozzle, one end portion of said valve extending outside of said nozzle and the other end portion thereof being slidably supported by and movable relatively to the constricted portion of said nozzle to vary the area of the air passage therethrough adjacent to the point of admission of the oil. 7

6. A spray burner comprising a Venturi nozzle, means for supplying air under pressure to said nozzle, means oil to the air stream flowing through said nozzle at the constricted portion thereof,

a ananually-operable valve telescopically moun ed in said nozzle co-axially therewith and movable relatively to the constricted portion thereof to vary the area of the air passage therethrough, said valve having a sight passage therethrough for observing the oil feed, and a window fitted in said passage. 7

7. A spray burner comprising a Venturi nozzle, means for supplying oil to said nozzle,means for supplying air under pressure to said nozzle, a valve havinga sight passage therethrough for observing the oil feed,

said valve being movable into the constricted portion of said nozzle adjacent to the point of admission of the oil thereto, for varying the area of air passage through said nozzle,

and a window, fitted in said passage.

8. A Venturi nozzle having a constricted air passage, an oil inlet opening laterally intosaid air passage, and a valve mounted telescopically in the nozzle and movable longitudinally of the axis thereof for varying the area of such constricted air passage,

one end of said valve extending outside of the nozzle and the other end thereof being slidably supported on the inner surface of the nozzle at the constricted portion thereof.

MAX SKLOVSKY.

for admitting fuel