US2867271A - Gas burner - Google Patents

Description

Jan. 6, 1959 E. C. JACKSON GAS'BURNER Filed Deep 23. 1953 EARL a memo/v INVENTOR ATTORNEY 2 Claims. (Cl. 158-99) The present invention relates to a fluid fuel burner and more particularly to a gas burner for use with incinerators.

Heretofore, gas burners have been used for supplying heat and in some casesgas burners have been used with incinerators for heating the material to the point where such material becomes disintegrated and will burn or oxidize. These prior structures have not been entirely satisfactory and have been diflicult to service and frequently .the entire burner and incinerator have been put out of service for an extended period of time while awaiting repair parts or while waiting a service man. As a result garbage and trash accumulated with the resultant health and fire hazard;

An object of the present invention is to overcome the above mentioned difiiculties of .the prior art incinerators and gas burners, and to provide a gas burner in which the burner and control elements may be removed as a unit and a replacement unit may be immediately, substituted so that the defective unit may be repaired with practically no interruption in service.

Another object of the invention is to provide a gas burner which may be applied directly to an incinerator so the gas burner serves to completely close the opening in the furnace or incinerator whereby no other closure or sealing means is necessary.

A further object is to provide a one piece burner unit which may be inexpensively constructed and remain operative for a great length of time with a minimum of maintenance or repair.

The burner unit of the present invention includes a tubular burner nozzle having a Venturi intermediate its ends and a flaring portion at its inner end provided with a restricted opening from which the mixture of gas and air is projected and at which restricted opening, the combustion occurs. A laterally extending flange intermediate the ends of the nozzle projects a' sufficient distance to close the opening through which the inner end of the nozzle projects into a furnace or incinerator with the flange serving to substantially ,close and seal such opening. On the opposite or exposed end of the nozzle a more or less conventional funnel shaped air inlet is provided through which the air supply is controlled by an adjustable plate having apertures designed for registrylwith apertures in the outer or exposed end of the burner body.

A pilot light forming structure is provided for directing an ignition flame toward the restricted opening of the nozzle. The gas supply and control conduits to the pilot light pass through the same opening in the wall of the furnace whereby the entire burner and pilot light forming structure may be removed asa unit. A time control for limiting the flow of gas to the burner is provided 2,57,27'1 Patented Jan. 6, 1 959 2 pair in a minimum of time and with a minimum of effort.

Further objects and advantages'of the invention will be apparent from the following description taken in conjunction with the drawing, wherein: V

Fig. 1 is a perspective view of the burner as applied to a vertical wall of a furnace with only a portion of the furnace shown and parts broken away for clarity;

Fig. 2, a sectional view taken'on line 2-2 of Fig. l;

Fig. 3, a sectional view taken substantially on line 33 of Fig. 2;

Fig. 4, a top plan view of the burner showing the location of the pilot light forming structure; and

Fig. 5, a fragmentary inner end view of the burner.

Referring'more particularly to the drawing, a portion of a wall 10 of a furnace or incinerator isv provided with an opening 11 through which a burner nozzle 12 extends into the furnace. Such nozzle includes a restricted Venturi portion 13 provided with a generally rectangular flange 14 extending laterally of the axis of the nozzle 12 .rate of combustion.

and suitable fastening screws 15 passing through openings in the flange 14 being threaded into the furnace maintain the nozzle in fixed position so that flange 14 substantially seals the burner receiver opening 11 of the furnace wall 10.

A portion 16 of nozzle 12 flares from the Venturi 13 toward the inner end where a conveyor wall is provided with a restricted gas and air port 17 from which the flame projects. The size of the port 17 can be increased to provide for a greater flow ofgas and a resulting higher From the Venturi 13 a portion of the nozzle flares outwardly providing a funnel shaped portion 18 provided with an outer end wall 19 provided with air supply sector shaped openings 20. Controlled by a plate 21 having sector shaped'openings 22 for registry with openings 20 for adjusting the amount of air going into the burner.

Combustible gas is supplied to the burner through an elbow'23 having a threaded end 24 threaded to a tapped axial opening in the outer end wall 19 of the burner nozzle. A lock nut 25 provided on the threaded portion 24 secures the air control plate 21 in position and also looks the burner nozzle in fixed relation to the elbow 23.

The threaded end 24 is provided with an orifice 46 (Fig;

5) for producing a jet of gas in the Venturi.

Referring to Figs. 1 and 4, it will be noted that a laterally projecting lug 26 is cast on the side of the nozzle 12 and a bracket 27 fixed by means of screws 28 threaded into the lug 26 supports pilot light forming means 29 for providing an ignition flame forthe burner projecting the flame laterally therefrom toward the restricted opening 17 at the inner end of the nozzle. Gas is supplied to the pilot light by means of conduit 30 connected by means of a union fitting to a pipe 31 upon which a control valve having a fire screen 32 rotatably secured to a knurled adjusted nut 33 are mounted. The pipe 31 has one or more openings within the fire screen 32 in communication with the pilot light formingmeans 29 supplying the desired amount of air for such pilot light. The amount of gas- 33 are threaded on to the pipe 31 so that a binding action and a shut off control under the influence of the heat'of the pilot light flame is provided for shutting ofi the entire supply of gas in the event the pilot flame becomes extinguished, and a manual shut ofl valve in the supply line joined to the burner by a union connection permits the entire assembly to be removed for replacement or reresults when relative rotation between the fire screen and the knurled nut occurs. The fire screen and nut cover the air supply opening and the adjustment of nut 33 controls the air flow. A control tube 35 extends from the pilot light to a shut ofl valve hereinafter described.

Gas is supplied from a conventional supply pipe 36 to a manually operated shut ofi valve 37 of well known type and through a union connection 38 including the necessary nipples to a pilot light controlled shut off valve device 39. The pilot light control device 39 is of conventional consrtuction being provided with a reset button 40 and controlled by means of the control line 35' which extends to the pilot light and is actuated by the presence of heat due to the pilot light being ignited so that in the event the pilot light becomes extinguished, the control device 39 will automatically shut ofl? the supply of gas.

The gas is conducted from the pilot light controlled valve device 39 through suitable conduits including an trol valve 42, the gas is conducted by means of a nipple;

44 and a union 45 to the elbow; 23 and into the orifice 46 in the end of threaded portion 24- Itwillbe evident that the flange- 14 is provided with a recess 47 for accommodating the pilot light gas supply pipe 30 and pilot light control duct35 and the opening 11 in the wall of the furnace is of suflicient size to permit complete withdrawal of the inner end of the nozzle including the pilot light forming means 29 and the supporting bracket andllug therefor whereby the entire burner with the additional structure thereon may be removed. j

The installation of the burner. is a simple matter of providing gas fitting connections and in the event that some portions of the control become defective and it is urgent that the incinerator or furnace be kept in operation, the shut off valve 37 may be closed, the four attaching screws may be removed, and the'union connection 38 separated, whereby the burner'may-be re-- moved with the entire control mechanism. Any necessary adjustments can be made very simply or the entire burner and control unit may be replaced With new or rebuilt unit thereby keeping the furnace or incinerator in practically continuous operation. V

The burner nozzle 12 may be removed separately by disconnecting union 45, disconnecting a union type connection 47 to the pilot light and a union type connection 48 between the control duct 35 and the pilot light con trolled device 39, thereby the burner may be removed without disturbing the other control elements intheevent that the burner becomes clogged or otherwise requires attention.

The burner shown operates satisfactorily for an output of 15,000 B. t. u. with the port 17 being cast therein without subsequent machining. For higher outputs the port 17 may be machined to a larger size and the controls: for correspondingly increased gas consumption 'may be provided so that the burner may operate at any output up to 125,000 13. t. u.

It will be obvious to those skilledin the art that various changes may be made in the invention without departing from the spirit or scope thereof and therefore the invention is not limited by that which is illustrated in the drawing and described in the specification, but only as indicated in the accompanying claims.

What is claimed is: i I

1. A burner unit for application to a furnace comprising a tubular nozzle including an inner end having a restricted discharge opening, an intermediate portion of the nozzle having a restricted cross-sectional shape and the outer endportion of the nozzle having a rapidly diverging open interior, with the outer end having radial web portions extending thereacross, a supply fitting' threaded into the central portion of the web portion of the outer end of the burner, a plate adjustable on the supply fitting for controlling the supply of air to the burner, the inner end of the fitting being provided with a restricted orifice for directing combustion gas toward the inner end of the burner and thereby. drawing air through the outer end of such burner, a flange mounted on the burner and projecting'laterally beyond the lateral dimensions of the inner end thereof and provided with a cut out portion for receiving pilot'light gas supply and control elements, a laterally extending lug on the nozzle projecting radially in the same direction from the tubular nozzle'as said out out, upon which a bracket may be mounted for a pilot light for projecting a flame toward the inner end of said nozzle and upon which a flame-responsive structure controlled by said pilot light may be mounted.

2. A burner unit for application to a furnace comprising'a tubular nozzle including an inner end having a' H restricted discharge opening, an intermediate portionof the nozzle having a restricted cross-sectional shape and the outer end portion of the nozzlev having a rapidly diverging open interior, means to secure a supply fitting to j the outer end of said nozzle, means to control the supply of air to said burner, the inner end of the fitting being provided with a restricted orifice for directing combustion gas toward the inner end of the burner and thereby drawing air through the outer end of such burner, a flange mounted on the burner and projecting laterally beyond the lateral dimensions of the inner end thereof and provided with a cut out portion for receiving pilotli'ght gas supply and control elements, a laterally extending lug on the nozzle projecting radially in the same direction-from.

the tubular nozzle as said cut out, upon which a bracket may be mounted for a pilot light for projecting a flame 7 toward the inner end of said nozzle. and upon which a flame responsive structure controlled by said pilot light may be mounted. I 1

References Cited in the file of this patent UNITED STATES PATENTS I 977,214 Muirheat 'Nov. 29, 1910 1,183,478 Mathias et a1. May 16,1916 1,763,159 Klein June 10, 1930 1,836,567 Wolpert et a1 Dec. 15, 1931 1,857,862 a Page May 10, 1932 2,164,417 'McKee July 4, 1939 2,184,947 Schell'; Dec. 26, 1939 2,295,784 Handley Sept.-15', 1942 2,336,816 Thompson Dec. 14, 1943 2,490,127 Handley Dec. 6, 1949 [2,498,162 Heller Feb. 21, 1950 2,562,536 Mayer July 31, 1951 2,720,918 Buysse Oct. 18, 1955 2,731,009 Pocrass et al. Jan. 17, 1956 FOREIGN PATENTS a 955,208 France 'June'27,

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