US2113870A

US2113870A - Oil burning apparatus

Info

Publication number: US2113870A
Application number: US95397A
Authority: US
Inventors: Reginald W Beckett
Original assignee: Cleveland Steel Products Corp
Current assignee: Cleveland Steel Products Corp
Priority date: 1936-08-11
Filing date: 1936-08-11
Publication date: 1938-04-12
Anticipated expiration: 1955-04-12

Description

April 12, 1938. R. w. BECKETT OIL BURNING APP R TUS Filed Aug. 11, 1936 1. INVEN TOR I WWW ATTORNEY Patented Apr. 12, .1938

OIL APPARATUS v Reginald W. Beckett; Rocky River,

to Cleveland Steel Products Corp., .Ohio, a corporation of Ohio Ohio, assignor Cleveland,

Application August 11, 1936, Serial No.195,397

8 Claims.

This invention relates to oil burning apparatus of the rotary type and more particularly to electrical ignition means therefor.

One of the objects of the present invention is to provide new and improved ignition means for oil burning apparatus of the rotary type.- Another object is to provide oil burning appa ratus of the so called wall flame type in which oil and air-are discharged from a rotating distributingdevice against a substantially endless member spaced from the distributing device; with electrical ignition means of a character which will quickly and efiiciently ignite the oil, and which will be free at all times from the for- 15 'mation' of carbon deposits.

A further object is to provide rotary oil burning apparatus with spark ignition means of improved construction in which carbon will not form upon the ignition electrodes, and in which the formation of carbon across the spark gap is prevented.

With the above and other objects in view which will be apparentfrom the following detailed description, the present invention consists in certain features of construction and com- -mounted within the furnace or shell I, which 5 y The oil burning apparatus, however. forms the subject matter of a copending application Serial No. 95,395, filed August 11, 1936. Briefly this apparatus includes a supporting. structure 2 supports a rotary oil and air projecting device 3 disposed above a refractory hearth structure 4, and a driving motor 5 disposed below the hearth structure 4.

Associated with the hearth structure 4 are spaced concentric inner and outer endless members e and 1 or heat resistant metal, the inner member 6, being disposed below the path of travel of the oil thrown outwardly by oil'discharge tubes 8 carried bythe projecting device 3. Mounted within the outerv member I, but

spaced outwardly pf the member 6 is an endless band 9 or ring of heat resistantmetal, and sup-' ported upon the upper edge of this band are a plurality of metallic directing or deflecting .elev merits l0. a The band. 9 in the illustration shown, being of r metal, is grounded, and forms one of the electrodes for the ignition device.

'binations of parts to "be hereinafter described with reference to the accompanying drawing, and then-claimed.

In the drawing which illustrates a suitable embodiment of the present invention, Fig. -1 is a horizontal section through a fur;

nace, taken above the oil burning unit,

Fig. 2 is an enlarged fragmentary plan view of the oil burning unit, showing in greater detail the ignition means and Asshown more clearly in Fig. 3, the hearth structure 4, carries a pair of substantially diametrically opposed electrodes ll of j heat resistant metal, each of which is vertically disposed and mounted in a non-conductive element I2 Fig.3 is an. enlarged vertical section taken substantially upon line 3-4 of Fig. 1.- f

In oil burning apparatus of the socalled r0 tary wall flame type, one of the disadvantages is that there is a tendency for carbon to form not only. upon the ignition electrode or electrodes, but also across the spark gap. This is highly objectionable, both from the standpoint of ineiiicient and slow ignition and of explosions which frequently result in carbon deposits onor acres the electrodes.

In the present invention, however, the. tendency toward carbon formation on the electrodes o and across the sparkgap is obviated.

Referring to the accompanying drawing in which like numerals refer to like parts through, out the several views, the oil burning apparatus is shown in association with anannular shell I which defines a' furnace combustion chamber. I It is to be understood, that one or more elec 55 of electric spark ignition devices heretofore used carried by the hearth structure 4, and extending 0 below the hearth structure,

' The lower ends of the electrodes H are pro vided with connector caps l3 which are connected by means of leads I with the terminals l5 of a transformer [6 supported below thehearth 5 structure.

Each electrode It extends well above the path of travel of the air being discharged by the fan blades l'|,of the distributingdevice 3 and is provided with a reversely bent portion ill, the end I 9"40 of which bends outwardly and extends over the inner endless member 6 and terminates in spaced relation with respect to' the flame ring, 9. Also, the reversely bent portions "of the electrodes are inclined from the vertical in the direction of '45, rotation of the projecting device 3', as indicated in Fig. 2, for a purpose to be later described. v As shown in Fig, 3, the tip 20 of the reversely bent portion i8 is disposed slightly belowthe upper edge of the endless member 8 and between the members 6 and 9, and the member i is pro-' vided with anotch 2| in advance of each electrode andextending downwardly tothe hearth structure 4.

trodes ll may be employed and that they may be ofthe continuously or intermittently operating type, and, also, that a separate electrode instead of the ring or band 9 may be employed. In any event, the electrode II has a portion extending above the path of the air discharged by the projecting device 3 and this portion is, there-- fore, exposed to the heat of combustion so that it, during operation of the oil burning apparatus, becomes heated to, such an extent that any oil which may strike the tip 20 thereof is immediately vaporized, thus preventing the formation of carbon on the tip 20. Also, the ring or band 9 becomes heated to such an extent that the oil which impinges against the same is, during normal operation,'immediately vaporized, thus.

obviating the formation of carbon deposits.

As a further precaution against the formation of carbon deposits across the electrodes, the

notches 2i are provided so that a portion of the the space, through which the ignition sparks pass,

free from carbon deposits. This is also assisted by the fact that the reversely bent portions of the electrodes H are inclined from the vertical .in the direction of rotation of the projecting device 3 whereby the sparks pass at least partially in the direction of travel of the air between the bands 6 and 9.

Although a single embodiment of the invention has been herein shown and described, it will be understood that numerous modifications of the construction shown may be resorted to' without departing from the spirit of this invention as defined in the appended claims.

What I claim is:

1. In an oil burning apparatus for furnaces having a combustion chamber, a hearth element extending across the combustion chamber, a rotary device having a rotary oil and air projecting head disposed above said hearth for projecting oil and air in generally horizontal paths, a substantially endless element extending upwardly from said'hearth for intercepting. oil and air projected by said head, an ignition electrode having a spark discharge tip disposed adjacent the path of projected oil and spaced from said endlesselement, and a second element associated with said hearth and extending upwardly therefrom inwardly of said tip in spaced relation with respect tosaid first element for intercepting a .portion of the projected air, the upper edge of said second element being disposed below the path of projected oil andhaving an opening therein near said electrode tip, whereby a portion of the air intercepted by said second element'w'ill flow through said opening into the space between said elements and travel through the space between said spark discharge tip and first element. I

2 In an oil burning apparatus for furnaces havinga combustion chamber, a hearth element extending across the combustion chamber, a rotary device having a rotary oil and air projecting head disposed above said hearth for projecting oil and air in generally horizontal paths, a substantially endless element ex-. tending upwardly from said hearth for intercepting oil and air projected by said head, an ignition electrode having a spark discharge tip disposed adjacent the path of projected oil-and spaced from said endless element, and a second element associated with said hearth and extend ing upwardly therefrom inwardly of and above said tip in spaced relation with respect to said first element for intercepting a portion of the projected air, the upper edge of said second element being disposed below the path of projected 011, said electrode having a portion disposed out of the path of the projected air and subjected to the heat of combustion, whereby said electrode, during normal operation, becomes suffiand a second element associated with said hearthand extending upwardly therefrom inwardly of and above said tip in space-d relation with respect to said first element for intercepting a portion of the projected air, the upper edge of said second element being disposed below the path of projected oil and having an opening therein, whereby a portion of the air intercepted by said second element will fiow through said opening into the space between said elements and travel through the space between said spark discharge tip and first element, said electrode having a portion disposed out of the path of the projected air and subjected to the heat of combustion, whereby said electrode, during normal operation of said apparatus, becomes heated by the heat of com bustion tovaporize any oil which may contact said electrode tip.

4. In an oil burning apparatus; thecombination with an oil and air discharging means for discharging oil and air in generally horizontal paths, and an element in the path of the oil and air for intercepting the same, of an electric ignition means igniting the oil intercepted by said element, including an electrode having atip portion disposed substantially in the path of the oil and a second portion thereof'disposed out of the path of the oil and air; discharged from said first means and arranged to be.subjected to the heat of combustion whereby said one electrode during normal operation of said apparatus, will be heated by the heat ofcombustion to vaporize oil which may strike said tip portion and thereby prevent the formation of carbon thereon,

5. An oil burning apparatus comprising means for discharging oil and air in generally horizon-'- tal paths, and ignition means including an electrode disposed in the path of oil and air discharged by the first means to intercept the, oil, and a second e'lectrode'of heat resistant metal having a portion extending across the path of the oil and air and a reversely bent portion having a spark discharge tip spaced from said first electrode and cooperative therewith to ignite the interceptedoil, at least the connection between saidfirst portion and said reversely bent portion ing normal operation of the apparatus, said tip spaced from said first electrode and coop-- second electrode will become sufficiently heated to vaporize any oil striking said tip and thereby prevent the formation of carbon thereon. v

6. An oil burning apparatus comprising means for discharging oil and air in generally horizontal paths, and ignition means including an electrode disposed in the path of oil and air discharged by said first means to intercept the oil, and a second electrode of heat resistant'metal having a spark discharge tip spaced from said first electrode cooperative therewith to ignite the intercepted oil, said second electrode having a portion disposed out of jected to the heat of combustion, whereby said second electrode, during normal operation, of the apparatus, will become sufficiently heated to vaporize any oil which may strike said tip, and thereby prevent the formation of 'carbon thereon.

'7. An oil burning apparatus comprising a rotating head for projecting oil-and air in generally horizontal paths, an endless elementsur-v for in-' rounding said head in spaced relation, tercepting the oil, at least a portion of the intercepting surface of said endless element forming an ignition electrode and a second electrode of heat resistant metal having the path of the air and sub a spark discharge erative therewith to ignite the intercepted oil, said second electrode having a portion disposed out of the path of the air and subjected to the heat of combustion, whereby said second electrode, during normal operation of the apparatus, will become sufliciently heated to vaporize any oil which may strike said tip, and thereby prevent the, formation of carbon.thereon.

' '8. An oil burning apparatus comprising a rotating head for projecting oil and air in generally horizontal paths, a substantially endless upright element ofheat resistant metal vfor inter-,- cepting the oil and air, said element forming one ignition electrode, a second electrode of heat resistant metal having a spark discharge tipi spaced from said first electrode and cooperative therewith toignite the intercepted oil, said second'] electrode having a portion disposed out of the path of the air and-subjected to-the heat of com- 1 bustion, whereby said second electrode, during normal operation .of the apparatus, will become suificlently heated} to vaporize any oil which may strike said tip and thereby prevent the formation of carbon thereon.

REGINALD w. BECKE'I'I.