US2381803A - Oil burner - Google Patents

Description

the oil, separating it into globules and turbulating it therein for a period of time for thorough mixing, andwlthen; the; air and .oil mixture 1S atomizedfby orifice I6 and blowna'into sleeve2ll where it is ignited. Jewel or other inserts 48' may be used to form the orifices to prevent dis-.: tortion of the sizes of the orifices under heat in combustion without'soot is obtained without the order to provide against unwanted variations End closure 34, the lug or nut 3 2, and: cap 28 are all centrally bored to mount a through pipe 50 which carries steam or hot .air or amixture of the two directly centrally through the oil chamber to preheat the oil as it. entersthe oil'- chamber By this co-axial arrangement of pipes thefpreh'eatingbf' the on "is made "very eflicie'nt becausethe'air chamberitself acts as an insulawraps the o'il and, air mixture 'ther'ein isalso heated by the contents of pipejll, so that the oil cannot cool in thefair chamber. The source of thefsteam' or hot air in pipe 50 is immaterial to the inventionbut may be derived from the furnace." As "shown, pipe 'fill extends axially through the ,oil nq'airchamber and through cap 28 f unt il it reaches the' vicinity. of sleeve where it is turned to enterthe same asbypipe 52 ir ih di e t o own A net-c c 5. or the like valve is. interposed betweenjthe, sleeve and the pipeifl and is' located in pipe". 52 for the purpose ofshutting ofi and controllingthe steam qr air under certain conditionsto be described; 'lfhe termsecondary air in this case ,means' the etc "In, air,,or combination: inpipe fiflfand in many] cases may. be superheated the. furnace in'th 'b flefirl te a ea- A release pipe 56"for undesired steam maybe attached toppipe 52 and av control valve 158, is located in this pipe also to closeofi the escape therein of the steam if all of v.thelatter available is to, be passed into, the, firebox. Pipe, 55, may becontinued into the air inlet pipe l3 8.as,shown,

to; preheat the air if desired... I

I ,,When the 'furnace istobestarted up, the valvej54 will usuallybeuclosedso that no steam, or seqondary Iairflas differentiated from the,,primary oiljmixing air inchamber 40, will impinge the. baffle plate, although the burner is perfectly capable of s'tarting under any conditions. First, however, lit is important, to heat the bafileand firebox bricks,. and this is; bestdone without the use of the steam, so that the present invention provides an extremely eflicient burner for wide differences in oil.

The furnace'is brought up to heat in a frac- I tion of the time necessary heretofore, and a great saving in the amount of oil used is efiected by reason of the complete combustion. Furthermore metals can be melted directly in the firebox without' oxidiz'ation, anda smaller furnace or power plant maybe used for obtaining the same heat as in larger prior installations. Also, the secondary air, or steam not only swirls and turbulates the atomized oil stream but further breaksjit'down by force of the pressure, and expands the gases, for more complete combustion.

Having thus described my invention and the advantages thereof, I do 'notwish to be limited to the details herein disclosed, otherwise than as set forth in theclaims, but what I claim is:

1. In, combination with a furnace, an oil burner comprising 'acentral pipe, means forming an oil chamber, a portion of the length of said pipe being surrounded bysaidmeans, an air chamber surrounding said 'oil'chamber, a wall of the oil chamberbeing provided with an orifice for admission of oil into the airchamber, a wall of the air chamber being provided with an. orifice in communication with the .iurnace, said pipe entering said furnace closelyfadjacent to said air chamber orifice but spaced therefrom, said pipe I being I adapted to conduct steam through the oil chamber into saidlfu'rnace in the region 'nace through the last/named orifice to mix secondary airin some installations. ,In. this case,. the steam may. be passed entirely into the air i nlet pipe 3 8{to,p reheat the primary air (and oil) to as high; a degree as possible; When the firebox is heated by. theignited oil at .A, Fig. 1,

the;va1ve .54 may be opened to di rect a blast of steam against the bafile, 'whichin turn directs ,it -.against.. the atomized, burning oil, and this actionblows-the fiameand burning oil outpast the ,end. of the baffle asindicated by, the arrows in Fig. .1, ;to,, swirl under force completely throughoutthe, firebox .andback to and under and over the baffle, resulting in complete combustion of the oil.. The steam also *cools the baflle and prevents it from burning, as of course it becomes extremely hot from the direct blast of burning 0i1.: vIt has been found thatthe combinationof the two streams, burning oil from sleeve. 20, and

secondary, airfrom sleeve 16 together produce such a complete combustion, when united to therewith in a single stream. '2; An oil burnerfcomprising,asteam pipe, an oil chambersurrounding a portion ofsaid pipe, an air' chamber surrounding a. portion of the oil chamber, saidj steam pipe being completely blockedoff from said chambersa furnace, said airchamber having communication with said furnace, a'wall between the oil and air chambers provided with ano'rifice, said steam pipe entering said'furnace at apoint closely spaced from the point of communication. between the air chamber and thefurn'ace and'means in the furnace located in a positiqntobeeffective to cause the steam and oil and air mixture to. merge into a single stream. V v e 3. An oil burner as recited in. claiml including means providing for escape of the pipe contents prior to entry into the furnace. v #Anj oil burner as recited in claim l'including an additional pipe leading from said first named pipe just before its entry into the furnace, said additional pipe being mounted'in cooperation with .said air chamber ,to' heat the same.

oil burner as recited in claim 2 wherein said last ln'amed means comprises a bafile on which the steam and oil and air mixture entering the furnace impinge to merge to form a single stream. I

.DELPI-IIS C. 'BREAULT.

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