US1433434A

US1433434A - Oil burner

Info

Publication number: US1433434A
Application number: US307565A
Authority: US
Inventors: Peter W Trimborn; Frank J Blum
Original assignee: CRUDE OIL GAS SYSTEMS Co
Current assignee: CRUDE OIL GAS SYSTEMS Co
Priority date: 1919-06-30
Filing date: 1919-06-30
Publication date: 1922-10-24
Anticipated expiration: 1939-10-24

Description

P'. VV. TRIVIBORN AND F. J. BLUM.

OIL BURNER.

APPLICATION FILED JUNEao. 1919. RENEWED MAR'. 2,9. 1922,.

Patnted 001k. M. 1922;.

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rn'rnnw.. TRIMBORN AND FRANK J. BLUM, or MILWAUKEE, wisconsin, nssreNons 'ro cnunn orL Gas sYs'rnMs coi/LrnNY, or MILWAUKEE, wrscoNsrN, .a consonni trioN or wrsCoNsrN.

y oIL Bunnies.

y Application led .Tune 30, 1919,'Seria1 No. 307,565. Renewed March 29, 1922. Serial No. 547,927.

To aiZZ w hom t may concern and FRANK J. BLUM, citizens of the United. States, residing at Milwaukee, county of 5 biilwaukee', and State of l/v'isconsin, have invented new and useful Improvements in Oil Burners, of which the following `is a spec1- iication. i

@urinvention relates to improvements in oil burners ofthe general type disclosed 1n former Letters Patent of the United States, No. 1,233,676, dated July 17th, 1917, granted to Ernest 0. Linton and Frank J; Blum.

The object of our invention is primarily to overcome difficulties experienced in the use of burners constructed as disclosed in said former patent, due to the carbonization in the fuel heating ducts, we having dis` f covered that such carbonization can be prevented by separately heating the air and the liquid fuel, (heavy hydrocarbon), and allowing the air and vaporized. fuel to mix` at a nozzle outlet,com1nunicat1ng directly with, or discharging into, the burner. A further object of our invention is to provide `a form of construction in which manu` facturing cost will be reduced to a minimum, with increased eliciency and durability as compared with burner structures of this` type heretofore made.`

The drawing illustrates" our invention partly in vertical section, and partlyin elevation, with parts" assembled in position 'for use. 4 y

Air under pressure is delivered through an inlet duct 1 to a heating coil 2 located within a 'cylindrical burner 3, the latter having air `.inlet apertures i at its rear end,l and the front end beingvopen for the discharge of the burning gases. Y y

The front end of the heating coil is connected with an outlet duct 5, elbowed at 6 and connected with a pipe 7 extending rearwardly along the cylinder 3 and the air inlet pipe 1, preferably parallel, or substan tiallyv parallel, thereto. Near its rear end, the pipe 7 is provided with a valve at 8, and i beyond this valve itis connected suitable l elbows anda downwardly 'extendlng pipe 9, with an air nozzle duct 10, conveying air through the nozzle head 11, the lower `end of the duct 10 providing an air passage through thehead ll of which it is a part.

Liquid fuel is delivered from a suitable `source of supply through a pipe 14; into the Be it known that we, Pnirnn W. TRIMBORN front end portion of a cylinder 15 through winch the pipe 7 'passes longitudnally. The .internaldiameter of the cylinder l5 is larger than. the diameter `of `the pipe 7, thereby forming an annular' passage 16, along which. the liquid fuel may travel. to an outlet 17 near the rear end of the cylinder, this outlet being connected by pipe sections 20, 21 and 22 with the nozzle head 11, from which the fuel is discharged into the path of the air blast from the lower end of duct 10. The lower end of the duct 22 also constitutes a portionl of the nozzle head, but it extends below the outlet of duct 10, and has a lateral outlet port 23.

It will be observed that the ducts 10 and 22 extend through a iitting25, which is preferably Y shaped, and threaded upon a relatively large duct 26, slidingly connected with a tubular extension 27 carried by the rear head ofthe burner cylinder 3. Air from the exterior is admitted to the duct 26 through the passages 30 and 31 in the obliquely extending arm of the fitting 25, whereby the air current delivered through the passage 30 tends to gyrate in the duct 26 and at thenozzle outlet. The duct 2G may be pushed into the burner cylinder 3 to reduce air heating capacity of the coils 2, and retracted to increase it.

lt will, of course, be understood that the air blast delivered through the pipe or duct .1.0 will exert an aspirating effect at the outlet 23 of the fuel duct 22 in thenozzie head, thereby splitting up the fuel vapor, and a'toniizing unvaporized fuel, if any.

(living to the fact that the air delivered through the pipe 1. cornes from a source of supply under pressure, `(the liquid fuel being also preferably delivered, under pressure, through the pipe 1li) the mixture will be delivered from the mixing duct 26 to the burner, with considerable velocity, acceler-` ated to sorne extent by burner suction when the mixture is ignited at the burner outlet. Therefore, alarge volume of additional. air will be drawninto the burner through the apertures 4i, and. by proper regulation, through adjustment of the valves at 5% and 241i, perfect combustion with a blue 'Haine may be obtained at the burner outlet.

It will be observed that in the structure as above described, the tube or cylinder 15 conyof the fuel, and to aless extent upon the velocity of vthe air. All of these factors should betalen into consideration u'ithreference to the density of the hydrocarbon, although a `Wide range of variation in proportion may exist, owing te the fact that both the air and fuel are heated very rapidly in the mixing tube 26, and in the burner 8, and also Aowing to the fact that the valves at 8 and 9A allow the velocity of both the fuel and the air to be readily controlled by valve adjustment.

In the construction illustrated, the air in pipe 7 may be heated to about 800O F. The temperature of the fuel at the outlet of chamber l5 will then be about 8600 F. under ordinary operating conditions, and With proper valve adjustments and manual adjustment of duct 26.

The fuel should be heated in the tube l5 to an extent sniiic-ient to vaporize all of it, or substantially all of it, Without raising the temperature very far beyond the vaporizing pointa and Vwith the construction herein disclosed, it is possible to control this temperature with reasonable accuracy, and by excluding air from the vaporizing chamber, ca-rbonization and the clogging of the ducts or passages may be effectually prevented.

ldlhile in the foregoing description of our invention we have referred to the various elements entering into the construction of our improved burner, as pipes and cylinders, elbows and fittings, we Wish it understood that these terms are Words of description, and not of limitation, it not being our intention to limit the scope of our invention to a structure which is built up from pipe elements, common in the art, as distinguished from a structure in Which the various ducts and passages are incorporated in a :single body of metal, such, for example, as a casting.

`We have alsodescribed the duct l, heating coil 2, and pipe 7, with its associated connections to the nozzle, as used for conveying` air under pressure to the nozzle. le Wish it understood that these pipe connections may be used to convey steam to the nozzle, in which case the steam Will, of course, be superheated in the coils 2. In the construe tion slioivn, the steam Will be substantially a full equivalent, since a plentiful air supply is provided through thel adjustable tube 2G, and through the apertures i. The air delivered through the tube QG is sullicient to maintain combustion. even though the tube 26 is pushed into the coil toward the burner outlet in such a. manner as to conn pletely enclose the nozzle, as is the case when it is found necessary to reduce the heating capacity of the coil. Ignition takes place at the outlet of the tube 26, regardless ol the position of the tube within the cylinder 3, except only that when the tube. 2G is retracted to expose the nozzle head, no ignition Will take place substantiallyat the nmazle outlet.

lille claim :M

l. An oil burner, including the combina tion of a suction air tube, open at both ends, a compressed air tube leading from a source of air supply under pressure and provided with an outlet at one end of the suction air tube, a fuel supply tube leading through the suction air tube along the compressed air tube and provided with a jet aperture for delivery of fuel into the path of the conipressed air, an open ended burner tube. surrounding the outlet ends of the other tubes. and means for utilizing` the heat ot the burner to directly pre-heat the compressed air and to indirectly pre-hcat the fuel through the medium of thc heated air.

2. An oil burner`r including the combination of a suction air tube, open at both ends, a compressed air tube leading from a source of air supply under pressure and provided With an outlet at one end of the suction air tube, a fuel supply tube leading through the suction air tube along the compressed air tube and provided with a jet aperture for delivery of fuel into the )ath of the compressed air, an open ended lburner tube surrounding the outlet ends of the other tubes, and means for utilizing the heat o i' the burner to directly pre-heat the compressed air and to indirectly pre-heat the fuel through the medium of the heated air, said compressed air duct havingl a coil 1within the burner tube and an exterior portion substantially parallel to the burner tube and jacketed by a jimrtion ol' the suppl)` tube.

3. An oil burner, including the combination of fuel and air supply ducts havingr their outlet end portions enclosed by an open ended air suction duct and enclosed in turn by an open ended combustion chamber, said air supply duct including a coil Within the burner, and said fuel supply duct having a portion in jacket relation to the air supply duct between the burner and the air supply and fuel duct outlets, said jacketing portion of the fuel suppl)Y duct havingr an inlet at one end and an outlet at the. other end to cause the fuel to travel longitinlinallv of the jacket along` the air supply duct.

d. An oil. burner, including the combina-- llt) j tion of fuel and air supply ducts having their outlet endV portions enclosed by" an open ended air suction duct,` and enclosed inturn by an open ended combustion chambei' at its outlet portion,said air supply duct including a coil Within the burner, and said supply duet having an inlet at one endand i an outlet at the other, to cause the fuel to travel longitudinally olf the jacket alongthe air supply duct, and valves for both the fuel and ail" supply duets, betweei'l said jacket and the duct outlets. i

5. ln a burner, the combim'ttion with ail' and fuel supply' ducts having outlets an l ranged for mingling the fuel and air asv slidably supported from said air suction duct, means Within saidconibustion cham- ,ber for preheating the an to be used 1n the burner, and air connections for said preheating means adapted to permitthe sliding adjustment of said combustion chamber.

` In testimony whereof We atlix our signa# tures inthe presence of two Witnesses. j it PETER W. TRIMBORN.

FRANK J. BLUM. Witnesses Lnvnlm'm C. Vlmmfnn, O. C. WEBER.