US1707774A - Rotary oil or hydrocarbon burner - Google Patents

Description

April 2, 1929. J. SCHEMINGER, JR

ROTARY OIL 0R HYDHOCARBON BURNER Filed May 25. 1925 2 Sheets-Sheet April 2, 1929 J. SCHEMINGER, JR

ROTARY OIL 0R HYDROCARBON BURNER Filed May 23, 1925 2 Sheets-Sheet lllliIIIII;IIIIIIIIIIIIIIIIIIIII Patented Apr. 2, 1929.

UNITED STATES PATENT OFFICE.

JOHN SCHEHINGER, JR.,'OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO AETNA AUTO- KATIC OIL BURNER, INCORPORATED, OF PROVIDENCE, RHODE ISLAND, A CORPO- RATION OF NEW YORK.

ROTARY OIL OR HYDROCARBON BURNER.

Application filed May 23, 1925. Serial No. 32,354.

the type known in the art as centrifugal or rotary oil burners.

The main ob]ect of the inventiorilis to provide in a rotary oil burner simple "and efli-.

cient means for introducing fuel oil and steam atthe point of delivery to the burner in such manner as to effect a thorough atomization of the oil and the commingling of steam therewith so as to promote combustion and prevent the formation or deposit of carbon within or upon the rotar burner head.

The invention will first e hereinafter more particularly described, with reference to the accompanying drawings, which are to be taken as a part of this specification, and then pointed out in the claims at the end of the description.

In said drawings, Fig. 1 is a vertical sectional elevation of a centrifugal or rotary oil burner illustrating a preferred form of embodiment of my invention; some parts of the device being broken away;

Fig. 2 is a plan view;

Fig. 3 is a fragmentary detail sectional I view on a slightly enlarged scale of the stationary discharge nozzle and parts associated therewith and with the rotary burner head; and

Fig. 4 is a vertical sectional view illustrating a modfication of the invention.

Referring to said drawings, in which the same reference letters are used to denote corresponding parts in different views, the letters A and A denote top and bottom plates of the rotary head of a centrifugal liquid fuel burner mounted on a vertical hollow shaft B which extends lip through a central opening in the base of the combustion chamber C, which is designed to be arranged within the surrounding walls of a furnace of ordinary construction in a well known manner; said combustion chamber consisting of a body of fire brick or other refractory mateial supporting a fire ring I); said body being supported upon an underlying curved metallic plate D having a central circular opening therein with a depending annular flange overlapping and fitting within and resting upon the outer upper edge of a circular trough-like casting E surrounding the shaft B; said casting E having apertured lugs e on its inner circumferential wall with fastening bolts therein for securing it to apertured lugsj projecting from a hollow standard or casting'F within which the shaft B has its bearings; said shaft having a gear wheel f thereon in mesh with a gear wheel or worm gear 9 on a driving shaft G for imparting rotary motion to the burner head. The burner head comprises said top and bottom plates A and A. preferably of annular form with substantially concave confronting surfaces. and a subjacent fan wheel A fixed on the same shaft. Said top plate as shown has a dome-like central portion a with its lower edge surrounding an upstanding flange 0, on a ring-shaped member overlying and spaced from and secured to the aforesaid bottom plate A which has its central portion a'-Z depressed and supported upon 4 an annular outwardly and upwardly extending flange on the lower end of a hub-like member or sleeve I fixed on the upper end of the hollow shaft B, so as to revolve there.- with. An oil feed pipe K extends up through said hollow shaft and carries on its upper end a discharge nozzle L; the lower end of said feed pipe being screwed into a hollow casting M fixed within the lower end of the hollow standard F so as to support the feed pipe stationarily within the hollow shaft B. The delivery nozzle L consists of a substantially semi-globular body having a liquid fuel and vapor receiving and mixing chamber Z therein and an apertured bottom plate screwed on the upper end of said feed pipe and formed or provided with a plurality of depending tubular projections each having a discharge tube therein formed with a restricted passage therethrough, preferably a tube of the Venturi type, for discharging jets of commingled oil and steam onto and around the central depressed portion of said bottom plate A. The space between the top and bottom plates A and A is gradually enlarged from the peripheral portion there of toward the center, and the peripheries of the two plates are slightly separated so as to provide a restricted peripheral discharge passage for the gaseous fuel or atomized oil and steam issuing from the burner head through said passage and the periphery of the upper plate extends slightly beyond the periphery of the lower plate so that the gaseous fuel will be discharged in a thin layer or sheet and thrown out horizontally into the space within the fire ring aroimd the burner head and against the vertical walls of said ring,-and as the combustible gases are con- 'sumed adjacent to the inner side of said iquid fuel or fuel oil by means such as I will now proceed to describe. I As shown, a pipe P connected at one end with a water tank or other source of supply I (not shown) is coiled around the fire ring D,

preferably on the upper outer side thereof, which is recessed to receive and provide a shoulder 'on which the coil may rest. Said ipe extends downwardly to a coupling memr p, for connection with a reduced extension or pipe P of diminutive size which extends throu'gh a stufling box R in a horizontal portion is of the oil feed pipe and along said pipe and upwardly through the vertical portion thereof and terminates within the-receiving and mixing chamber of the discharge nozzle so as to introduce steam in said chamber for admixture with the liquid fuel therein at the point of delivery of'the liquid, and the steam thus introduced serves to atomize the'fuel oil, and the intense heat acting upon the vaporized oil and steam is suing from-the discharge nozzle and filling the space between the top of the nozzle and the underside of the top plate A serves to superheat the steam within and issuing from the mixing chamber, whereby any partially atomized oil that may escape is broken up and atomized by the superheated steam with which it is thoroughly commingled and the mixture thus produced is evenly distributed around and within the space encircled by the fire ring so as to insure complete combustion and the generation of intense heat for heating the water pipe surrounding the fire ring and generating steam therein for delivery to the mixing chamber within the discharge nozzle; the rotating burner head being rapid- 1y driven so that the commingled oil-gas and steam is thrown out from between the peri heries of the top and bottom plates thereot at a high velocity in a plane parallel to the flat horizontal peripheral portions of said plates and perpendicular to the fire ring; the speed of rotation being sufiiciently high to impart to the outgoing oil-gas and steam a high velocity, which will prevent back firing into the space within the rotating head, and thus prevent the formation and de osit of carbon on the interior of the rotating p ates and within the nozzle housed between said plates, also preventing injurious vibration, which results from imperfect atomization of the oil, and consequent return of unburned gases to the interior of the rotating burner ead, resulting in the deposit of soot or carbon therein.

In Fig. 4 of the drawings I have shown a modification in which the chambered discharge nozzle is omitted, and the feed-water pipe P extends from a source of supply up through the base portion of the fire ring and has a vertical coil P formed therein adjacent the inner wall of the fire ring, and from said coil the pipe extends to and through the center of the top plate of the burner head in which is formed an aperture to re ceive a down-turned end portion of the pipe, which terminates at a point directly above the inlet end of the fuel feed pipe, which enters the space between the top and bottom plates of the burner head underneath said terminal, so that as the li uid fuel issues from the oil feedv pipe a jet 0 steam coming from an opposite direction will be injected into the incoming liquid fuel, with the results hereinbefore stated.

The fan underneath the bottom plate of the burner head is similar to that shown in Fig. 1 but it may be of any suitableconstruction. As shown in Fig. 1 it consists of upper and lower fiat rings A and A connected by an annular series of vertically disposed plates or fans a by the rotation of which air will be driven upwardly around the burner head into and through the film of atomized oil and steam issuing from between the peripheries of the plates A and A of the burner head for supporting and promoting combustion. In Fig. 4 the upper ends of the vanes or fan blades are secured to the lower plate of the burner head instead of being secured to a flat ring A as in Fig. 1. However, the form of the fan in either case is not essential, as various 'forms may be used.

The vertical shaft to which the burner head is secured may he journaled in ball bearings arranged within the hollow standard F, as shown in Fig. 1, or in any desired manner, but said bearings and the means shown for imparting rotary motion to the burner head may be of the form shown or of any desired construction, and as no claim is made to the shaft hearings or to the means employed for imparting rotary motion to the burner head and parts associated therewith, further description thereof is deemed unnecessary.

In its broader aspects my invention resides essentially in providing simple and efficient means, associated with the feed-pipe and rotating atomizing device of a rotary oil burner or the like, whereby a jet or ets of steam may be injected into the fuel oil as it is delivered to the burner and a thorough atomization of the oil and the admixture of steam therewith etfected and a. highly inflammable gaseous mixture produced and thrown out by the rotating atomizing device into the combustion chamber, thus promoting combustion and preventing the tormation and deposit of soot or carbon on the rotating burner head or atomizer. The word oil as used herein is intended to include any liquid fuel adapted for admixture with steam, while the word vapor applies to vaporized liquid or steam.

It will be understood of course that various changes may be made in the details and arrangement of parts without departing from the spirit and scope of my invention, and I therefore do not desire to be limited in the appended claims to the specific form and arran ement of parts shown and described.

I-Taving thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. An atomizing device for rotary oil burners revolubly mounted on a vertical hollow shaft, said device comprising top and bottom plates having substantially concave confronting surfacesand arranged to form a centrally disposed oil and vapor receiving chamber and a restricted peripheral discharge passage in open communication with said chamber, a fuel feed pi e extending up through said hollow shaft liaving mounted thereon within said chamber a nozzle having depending discharge tubes leading from a uel and steam mixing chamber therein into said oil and vapor receiving chamber, and means for conducting steam into said mixing chamber at the point of delivery of liquid fuel therein.

2. In a liquid fuel burner, a burner head revolubly mounted on a vertical hollow shaft,

'a stationary fuel feed pipe within said shaft carrying on its upper end a discharge nozzle centrally arranged between top and bottom plates having their peripheries spaced apart so as to providea restricted peripheral discharge passage in open communication with a centrally disposed oil and vapor receiving chamber, said nozzle having an oil and vapor mixing chamber therein and said feed pipe extending up through said shaft into said mixing chamber, and means for introducing steam into said mixing chamber for admixture with the liquid fuel therein.

3. The combination, in a rotary oil burner, of an atomizing device including spaced top and bottom plates revolubly mounted on a vertical shaft so as to provide a centrally disposed oil and vapor receiving chamber and a restricted peripheral discharge passage, :1

fuel feed pipe extending into the space be tween said plates and carrying a discharge nozzle having a liquid fuel and vapor mixing chamber therein into which the delivery end of said feed pipe protrudes, and means for introducing steam into the liquid fuel as it enters said mixing chamber.

4. The combination, in a rotary oil burner, of an atomizing device including spaced top and bottom plates revolubly mounted on a hollow shaft so as to provide a centrally disposed oil and vapor receiving chamber and a restricted peripheral discharge passage, a

fuel feed pipe extending up through said shaft into said chamber and carrying a discharge nozzle having a liquid fuel. and vapor mixing chamber therein into which the li uid fuel is discharged, and a pipe within said eed pipe for introducing steam into said mixing chamber.

5. In a rotary oil burner, an atomizing device comprising annular top and bottom plates with opposed concave surfaces revolubly mounted on a vertical shaft so as to provide a centrally disposed oil and vapor receiving chamber and having their peripheries spaced apart so as to provide a restricted peripheral discharge passage in open communication with said chamber, a fuel feed pipe carrying a discharge nozzle centrally arranged between said plates within said chamber and having a liquid fuel and vapor mixing chamber therein into which the liquid fuel is discharged, and means for introducing steam into said mixing chamber for admixture with the liquid fuel therein.

6. The combination in a rotary oil burner, of a burner head revolubly mounted on a hollow shaft and having a centrally disposed oil and vapor receiving chamber therein, an oil feed pipe extending up through said shaft, a discharge nozzle fixed on said feed pipe within said chamber and having a fuel receiving and mixing chamber therein into which the liquid fuel is discharged, and a pipe within said feed pipe and associated means for pre-heating water and introducing steam into said mixing chamber.

7. In a rotary oil burner, a rotary head having means thereon for distributing liquid fuel by centrifugal force, said head having top and bottom plates withopposed concave surfaces providing an inwardly enlarging oil and vapor receiving chamber in open communication with a restricted peripheral discharge passage and enclosing therebetwecn a stationary fuel discharge nozzle, said nozzle being of substantially semi-globular form and having a liquid fuel and steam mixing chamber therein, and tubes of the Venturi type for discharging jets of commingled oil and steam into said oil and vapor receiving chamber and means for introducing liquid fuel and steam into said mixing chamber.

, 8. The combination, in a liquid fuel burner, of an atomizing device comprising a revoluble burner head having an oil and vapor receiving chamber therein and a restricted peripheral discharge passage in open communication with said chamber, a liquid fuel and vapor mixing device within said chamber of approximately semi-globular form having a mixing chamber therein and depending tubes of the Venturi type, for discharging jets of commingled oil and steam onto and around the central part of the bottom of said receiving chamber. means for conducting liquid fuel into said mixing device, and means for discharge passage in open communication with said chamber, a liquid fuel feed pipe protruding into said chamber, a mixing device mounted on said feed pipe, a water supply pipe and means associated therewith for utilizing the heat of the burner to generate steam; the latter pipe terminating within said mixing device in close proximity to and adapted to inject steam into the liquid fuel at the point of delivery thereof into said mixing device, and means for discharging jets of commingled fuel and steam from said mixing device intosaid heating and mixing chamber, whereby a thorough admixture of the fuel and steam is effected and the mixture vaporized and discharged in a thin film into a combustion chamber.

10. In a liquid fuel burner, a rotary burner head having an oil and vapor receiving chamber therein and a restricted peripheral discharge passage in open communication with said oil and vapor receiving chamber and arranged to discharge commingled vaporized fuel and steam into an encompass ng combustion chamber, a fuel and steam mixing dev1ce within said receiving chamber, an oil feed pipe protruding into said mixmg device, and

a steam pipe having its delivery end arranged.

to discharge into the fuel issuing from said feed pipe at the point of delivery of fuel mto said mixing device, for comminglmg o 1l and steam, and means for discharging commingled oil and steam from said mixing device into said receiving chamber.

11. In a liquid fuel burner, a rotary atomizing device having a centrally disposed liquid fuel and vapor heating and mixing chamber therein in open communication with a surrounding portion or passage-way which gradually diminishes in size toward its periphery, the peripheral portion thereof forming a restricted discharge passage, a combustion chamber encompassing said device, a liquid fuel feed pipe having its delivery end protruding into said heating and mixing chamber, and means for injecting steam into the liquid fuel at the point of delivery thereof into said heating and mixing chamber, whereby a thorough admixture of the fuel and steam is effected and the mixture vaporized and discharged in a thin film into said combustion chamber.

12. In a liquidfuel burner, a rotary atomizing device of circular form having a centrally disposed and enlarged liquid fuel and vapor heating and mixing chamber therein in open communication with a surrounding ortion or passage-way of gradually diminishing capacity toward its periphery and ter minating in a restricted peripheral discharge passage, a combustion chamber encompassing said device, a fuel and steam mixing device within said heating and mixing chamber, a fuel feed pipe protruding into said mixing device, and means for injecting steam into the fuel at the point of delivery thereof into said mixing device, the latter device having means thereon for discharging jets of commingled fuel and steam into said heating and mixing chamber, whereby a thorough admixture of of the fuel and steam is effected and the mixturevaporized and discharged in a thin film into said combustion chamber.

13. A liquid fuel burner comprising a rotary shaft carrying an atomizing device having an inwardly enlarging oil and vapor heating and mixing chamber therein and a restricted peripheral discharge passage in open communication with said chamber, a central- 1y disposed hollow li uid fuel and steam mix- 1 ing device within said chamber, a fuel feed pipe for conducting liquid fuel into said mixing device, a combustion chamber encompassing said' atomizing' device, means associated with said combustion chamber for discharge" jets of commingled oil and steam- .mto said heating and mixing chamber.

14. A liquid fuel burner comprising a rotary burner head composed of substantially circular plates of approximately concavoconvex form secured together with their concave surfaces confronting and their peripheries slightly spacedapart so as to provide a centrally disposed heating and vaporizing chamber which is gradually enlarged toward its center and a restricted peripheral discharge passage in open communication with said chamber, a fuel feed pipe for delivering liquid fuel into said heating and vaporizing chamber, a combustion chamber encompassing said burner head, and a water supply pipe having a part thereof arranged within said combustion chamber and its delivery end protruding into saidcheating and vaporizing chamber and terminating in close proximity to the delivery end of said feed pipe, whereby the heat of the burner is utilized for heating the water and generating steam for delivery into the liquid fuel in coincidence with and at the point of delivery of the fuel into said heating and vaporizing chamber.

In testimony whereof I aflix my signature.

JOHN SCHEMINGER, JR.

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