US2975829A - Fuel oil burner - Google Patents

Description

March 21, 1961 J. G. HOWELL, JR

FUEL OIL BURNER 2 Sheets-Sheet 1 Filed Sept. 9, 1957 INVENTOR dorm GHOWELL dR.

BY M W ATTORNE March 21, 1961 J. G. HOWELL, JR

FUEL OIL BURNER 2 Sheets-Sheet 2 Filed Sept. 9, 1957 INVENTOR JOHN G.HOWE LL are.

BY M *7? ATTORN United States Patent 70 FUEL OIL BURNER John G. Howell, Jr., Piedmont, Califi, assignor to Qwens- Illinois Glass Company, a corporation of Ohio Filed Sept. 9, 1957, Ser. No. 682,851

1 Claim. (Cl. 158-76) The present invention relates to improvements in fuel oil burners and more particularly to burners adaptable for underport firing of regenerative type furnaces such as those presently used both in the steel and glass industries.

Heretofore, burners intended to perform the function of that disclosed herein have been relatively unsatisfactory for many reasons, among them being that frequent necessary replacement is an involved operation requiring the services of at least two men for a substantial period of time; the burners are incapable of any angular adjustment to predetermine the direction of fuel mixture projection into the furnace; the burner spuds become clogged and damaged too easily and finally there has been no satisfactory provision for uniformly cooling a housing for the burner.

My invention has for an important object the provision of a readily removable burner requiring only a few minutesvtime of one man in effecting replacement.

Another object is the provision of novel and unusually satisfactory means for.water cooling the burner housing and doing so in such fashion as to completely scavenge and remove all entrapped air that might be introduced with the water or other liquid coolant.

It is also an object of my invention to provide novel means for adjusting the angular position of the burner spud in a vertical plane to thereby alter the direction of introduction of the fuel mixture into the furnace proper as operating conditions may require.

Further objects of my invention are to provide a burner spud in which the fuel discharge orifices or apertures are readily cleanable and, additionally, effectively protect these orifices by protruding metal flanges against bot'n damage and possible clogging.

Other objects will be in part apparent and in part pointed out hereinafter.

In the drawings:

Fig. 1 is a fragmentary sectional view showing my improved fuel burner mounted in the floor of an air flow passageway of a regenerative glass melting furnace.

Fig. 2 is an enlarged verticalsectional elevational view of the burner shown in Fig. 1.

Fig. 3 is an enlarged fragmentary sectional view of the upper portion of the fuel'oil burner showing in some detail the burner head or spud, its mounting and the adjacent portions of the water cooled housing.

Fig. 4 is an elevational view with parts in section as seen when looking in the direction of the arrows of line 4-4 of Fig. 3.

Fig. 5 is a fragmentary sectional view showing the lower portion of the housing and oil supply line taken substantially along the line 55 of Fig. 7.

Fig. 6 is a sectional plan view taken substantially along the line 66 of Fig. 3.

Fig. 7 is a sectional plan view on an enlarged scale taken substantially along the line 7-7 of Fig. 2.

Fig. 8 is an enlarged fragmentary sectional elevational view of the burner head or spud which is supported indirectly by the fuel oil supply pipe therein shown.

Fig. 9 is a sectional view with parts in elevation taken along the line 9-9 of Fig. 8.

For the purpose of illustration, I have shown my fuel oil burner operating in conjunction with a conventional regenerative-type glass melting furnace which is diagrammatically shown as comprising a tank T wherein the glass batch B is deposited and melted and an air flow passageway A which communicates at one end with the space above the glass batch and at its other end with a chamber C containing the customary checkers C. This structure, insofar as the air flow passageway and checker work are concerned, is duplicated on the other side of the furnace and in operation hot air moving over the checkers C enters the furnace proper by way of one of the air flow passageways while waste gases are discharged through the opposed flow passageway. These waste gases heat the checkers so that incident to reversing the furnace incoming air moves over the checkers and is preheated thereby. In the floor F of the air flow passageway A is a vertical opening 10 to accommodate the fuel oil burner :11 and beneath said floor is a steel frame 12 designed to support the burner 11 with its upper end projecting into the air flow passageway the desired extent.

The burner 11 comprises an elongated cylinder-like housing 13 having a cover plate 14 at its upper end and immediately beneath said cover plate is provided with a lateral discharge port 15 through which the fuel spray is directed into the furnace proper by way of the air flow passageway A as will be apparent'hereinaften- The lower end of this housing 13 is open and intended to be closed by means of a removable cover plate 16. This cover plate is provided with an annular marginal flange 17 provided with several radial notches 18 designed to accommodate fastening devices 19 which may be in the form of pivoted bolts 20 and wing nuts 21 suitably secured to and externally of the lower end of the housing 13. A primary air inlet pipe 22 is connected to the housing 13 in proximity to the cover plate 16 for the purpose of supplying air for mixture with fuel oil or the like emitted by the burner head 23.

This burner head 23 is positioned in the extreme upper area of the housing 13 and carried by a fuel supply pipe 24 which extends longitudinally downward through the housing 13 and is rigidly secured to the aforementioned" cover plate 16. This oil supply pipe extends through the cover plate and is connected to a source of supply of oil (not. shown). By reason of the structure just described, it is apparent that adjustment or replacement of the burner head becomes a very simple operation necessitating only loosening the fastening elements 19 and removal of the cover plate, fuel oil pipe and burner head as a single unit.

For the purpose of protecting the burner head and associated parts against the detrimental eifects of the intense heat in the area in which this device operates, I have provided cooling means comprising acylindrical jacket 25 surrounding a major portion of the housing 13 inv spaced relationship thereto and extending a short distance above the closed upper end of said housing. A supply pipe26'for a liquid coolant is connected to the lower end of the jacket 25 and a discharge pipe 26 for such coolant is mounted within the housing with its upper end projecting into the space between the upper ends of the jacket and housing and positioned in close proximity to a recess 27 on the interior of the upper end of the jacket. In this recess 27 any air bubbles formed are entrained and then make their exit through the discharge pipe 26 with the result that all surfaces of the housing are thoroughly flooded and coo-led. This pipe 26 has an outlet end 28 opening through the housing 13 near its lower end. In order to positively insure effective cooling of all of the surfaces of the housing, the liquid coolant (water for example) is directed at a controlled velocity Patented Mar. 21, 1961 along a predetermined path with the result that no voids are created which would produce scale deposits and ultimately result in failure of the jacket. To this end I have provided a spiral fin 29 which is secured t. the exterior surface of the burner housing 13rsoas to cause flow of the injected coolant in a spiral path encircling said burner housing. Thus, all surfacesof the housing are uniformly and effectively cooled.

The burner head 23, as stated heretofore,.is carriedby the fuel oil pipe 2 4 and is removable with the latter and the cover plate 16 for the purposes of replacement, adjustment, etc. Connection between the burner head and pipe is obtained by means of cored block 30 which is welded or otherwise attached to the upper end of the fuel supply pipe and is formed'with ahub' 31 at one vertical side for reception in a correspondingly shaped recess 32 in one side of the burner head 23. The block 30 is pro vided with a chamber 33 communicating With'the fuel oil supply pipe 24 and the passageways 34 and 34 in the burner head 23 by way of a pasageway 35 in the afore-- mentioned hub 31. The passageway 34 is in eifect an extension of the pasageway 35 through the hub 31 and chamber 33 and all register with bolt or pin openings 36 through which a hinge pin 37 or bolt extends. This bolt has a head 38 at one end and a nut 39 at its other end together with a washer or collar 40. One end of the passageway 34 in the burner head 23 communicates with a multiplicity of burner orifices 41 or apertures which may be positioned in a single row and in fan-like fashion to predetermine the spray pattern. For the purpose of protecting these orifices against damage and to minimize possible clogging, a pair of flanges 42 extend along side the row of orifices, as best shown in Figs. 4 and 8.

Within certain relatively narrow although adequate limits, the burner head is angularly adjustable in a vertical plane about the hinge pin 37 for the purpose of predetermining the precise direction of projection of the fuel oil spray into the air flow pasageway A and furnace proper. Such is accomplished'simply by looseningthe lock nut 39 on the hinge pin 37 (Fig. 9) and a set screw 43 (Figs. 8 and 9), the latter normally securing a pointer 44 in the desired position on the burner head 23. The pointer 44 is pivoted on the head by means of a pivot pin 45 and the apex end of said pointer normally projects into a notch 45 on the exterior of the aforementioned cored block 30. The burner head 23 then is moved about the axis of the hinge pin 37 to the desired angle and thereupon both the lock nut 39 and set screw 43 are tightened to secure the parts against any further relative movement. A vertical opening 47 in the burner head 23 loosely re ceives a guide rod 48 when the various parts are assembled in operating position. This guide rod 48 (Figs. 2 and 3) depends from the upper end wall 14 of the housing 13 and extends longitudinally downward into .the latter a substantial distance where it is formed with a tapered lower end to facilitate entry into the opening 47. Such arrangement, as'is obvious, simplifies and permits material speeding up of assembling of the parts and insures proper orientation of the burner head in relation to the discharge port 15. The opening 47 in the burner block is sufliciently larger in diameter than the guide rod to permit the previously described angular adjustment of the burner head.

It is believed to be entirely obvious, in view of the foregoing, that the structure described provides exceptional uniform and effective cooling of the burner housing andmaterially facilitates initial assembly of the parts as well as replacement of the burner heads whenever operating conditions require. Asexplained heretofore, removal, replacement, or adjustment, involves simply loosening of the three fasteners 19 and lowering of the cover plate together with the burner head supporting oil supply pipe 24. This is a one manoperationwhich can be efiected with ease and rapidity. V

Modifications may be resorted to Within the spirit and scope of the appended claim.

I claim:

A fuel oil burner comprising an elongated cylindrical housing adapted to have its axis disposed substantially vertically when the burner is in an operative position, said housing having a closed upper end and an open lower end and provided near its closed end with a radial discharge port for atomized fuel, a cylindrical jacket enclosing a major portion of said housing'and with the latter providing an annular liquid coolant accommodating space between them, a spiral fin in said space extending substantially the entire length of the jacket, said jacket extending a short distance above and thence across the housing in axial spaced relation to the closed end to thereby provide a chamber immediately above the latter, a liquid coolant inlet adjacent the lower end of the jacket, a liquid coolant discharge pipe extending lengthwise in the housing with an inlet .end projecting well into said chamber and an outlet end in proximity to the coolant inlet, means for introducing air into the lower portion of said housing under pressure to cause movement of such air to the discharge port, a burner head at the upper end of the housing formed with a row of orifices facing the discharge port, a fuel supply pipe disposed substantially axially within said housing and connected at its upper end to the burner head and a bodily removable cover for the open lower end of the housing fixed to the fuel pipe whereby the cover, fuel pipe and burner head may be removed and replaced as a unit, the fuel pipe and burner being so positioned relative to said cover that assembly of the latter with the housing places the burner in registry with the radial discharge port'in said housing.

References Cited in the file of this patent UNITED STATES PATENTS 265,156 Sheets Sept. 26, 1882 1,192,573 Schneider July 25, 1916 1,445,827 Fesler Feb. 20, 1923 1,457,557 Smythe June 5, 1923 1,980,636 Roumillat Nov. 13, 1934 2,408,282 Wolf Sept. 24, 1946 2,543,688 De Coriolis et al Feb. 27, 1951 2,735,409 Aurin et a1 Feb. 21, 1956 2,832,401 Lail Apr. 29, 1958 FOREIGN PATENTS 450,531 Great Britain July 20, 1936

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