US2097771A - Combined atomizing and vaporizing torch - Google Patents

Description

Nov. 2, 1937. s. c. NELSON 2,097,771

COMBINED ATOMIZING AND VAPORIZING TORCH Filed July 23, 1956 51 a 27 Z6 Z9 24 I Z8 2.? I 21 13 INVENTOR. 5500 0 C. IVEL so/v ATTORNEY.

Patented Nov. 2, 1937 PATENT OFFlgCE (JOMBINED ATOMIZING AND VAPORIZING TORCH Seddon C. Nelson, New York, N. Y., assignor to Hauck Manufacturing Company, Brooklyn,

N. Y., a corporation of New York Application July 23, 1936, Serial No. 92,094

2 Claims.

The invention relates to burner apparatus for liquid fuel, more especially oils and the like which, when utilized for combustion in a vaporizing burner, require the provision of preheating means to insure the vaporization of the fuel and involving a substantial time interval before the fuel may be ignited.

It is an object of the present invention to provide a vaporizer type of torch wherein such preliminary heating is not required; and with which the fuel may be ignited immediately to set the burner in operation, there being required no wick or like means for preheating purposes.

Another object of the invention resides in the provision of fuel atomizing means utilizing air in connection with-the burner nozzle for starting up of the burner, together with a vaporizing coil adapted temporarily to receive and to heat the air effecting atomization.

A further object of the invention resides in the provision, in a burner having the usual vaporizing coil, of means whereby the interior of this coil as well as the burner nozzle will be maintained substantially free of carbon deposits.

In carrying out the invention, there is associated with the usual form of vaporizing burner embodying a burner head with vaporizing coil and a nozzle member from which the vaporized fuel is injected into the burner head, a valve member embodying a single valve with oppositely disposed valve pieces respectively adapted to cooperate With two seats, the valve in one position controlling the delivery of air into the aforesaid preheater coil and in the other position the delivery of oil thereto.

The usual nozzle member is modified also to the extent of adapting it for atomizing purposes by the addition of an oil injector spud mounted therein and having an orifice axially aligned with the nozzle orifice. This modified nozzle member affords initially a means for atomizing the fuel which is delivered through the orifice of the injector spud to be atomized; and subsequently when fuel is delivered thereto through the coil to inject the vaporized fuel into the burner head, the injector spud then being substantially inactive.

The nature of the invention, however, will best be understood when described in connection with the accompanying drawing, in which:

Fig. l is a longitudinal section through the novel burner apparatus.

Fig. 2 is an end elevation thereof.

Referring to the drawing, l0 designates a casing affording a burner head or hood withoutlet or mouth H at its outer end and with an inlet opening 12 at its inner end into which the fuel in finely divided state or in vaporized condition is to be delivered for combustion as hereinafter set forth. There is mounted within the said casing toward its outlet end a preheater coil E3, the outer end thereof being connected by pipe M to a hot air or vapor duct iii of the nozzle portion of the burner. The latter comprises a body portion l6 axially bored to receive an inlet pipe I! for the liquid fuel and also an injector spud or primary nozzle member l8 communicating with the bore and having the orifice I9 through which oil is delivered. About the orifice end of the spud I8 there is removably secured a further orsecondary nozzle element 20 provided with an orifice 2| axially aligned with the orifice I9, but of larger diameter, and directed toward and in the axis of the inlet opening [2 to the burner head.

Body 5 is, furthermore, provided with abypass duct 22 which communicates with the bore thereof and terminates in a valve seat 23. With the latter is designed to cooperate avalve piece 24 of a valve member movable in achamber 25 which is adapted to communicate withduct 22 through the seat 23 and having the further and oppositely disposedseat 26. This latter seat is designed to cooperate with an oppositely disposedvalve piece 21 of valve member when brought in contact therewith as through manipulation of thehand wheel 28 of the valve.

The double-ended valve member is reciprocable in thevalve chamber 25 which is also in communication with the inner end of the preheater coil, as through thepipe 29; and afurther duct 30 is designed to supply air for atomization and under the requisite pressure tochamber 25 from a chamber 3| located beyond thevalve seat 26. When the inner of the valve pieces seats to close off theduct 22, the oppositely disposed one 21 will be unseated and communication is afforded between the source of air supply and the coil l3. From the latter, in turn, air under pressure is afforded about the spud I8 and through orifice 2| for atomizing oil delivered through the orifice I9, so that the burner may be immediately started by igniting the discharged atomized fuel.

As soon, as the combustion of the fuel has brought the coil l4 to the temperature required for vaporization of oil,hand wheel 28 is manipulated to gradually unseat thevalve piece 24 for admitting the fuel throughduct 22 into the the atomizing action tovalve chamber 25 and from the same throughpipe 29 into the vaporizing coil I3. At the same time, the supply of air is gradually cut off untilvalve piece 21 finally contacts itsseat 26 to shut the same off entirely. The burner then operates in the usual manner as a vaporizing torch.

It will be appreciated that in the passing of air through the coil l3, not only will this air serve to burn any deposits of carbon and thus keep the interior of the coil clean; but the introduction of heated air through the duct I5 and pipe M, which connect the coil to the nozzle 7 20 when the fuel is eventually provided through the said coil, will insure against the vapor being chilled and condensed in coil to the nozzle. Proper combustion will, therefore, be maintained during the transition from the vaporizing action.

'I claim:

1. In burner apparatus: the combination with a burner head provided with an inlet and a mouth, and a heating coil mounted in the head; of a nozzle element embodying an inner and an outer orifice axially displaced for directing fuel axially into said burner head inlet, a fuel connection to the nozzle element, a source of air supply, means for connecting the latter to one end of the heating coil, means connecting the other end of the said coil to the nozzle element for discharge through the outer of its orifices only, and a duplex valve member adapted to its passage from the communicate with the said fuel connection and with the said source of air supply to afiord alternatively air or fuel to the said heating coil and through the same to the nozzle element.

2. In burner apparatus: the combination with a burner head provided with an inlet and a mouth, and a heating coil mounted in the head; of a nozzle retaining body bored to receive a fuel connection, a nozzle element communicating with the bore and having an outlet orifice, a secondary nozzle element mounted about the first-named nozzle element and provided With an orifice in the axis of the first-named nozzle for discharge of fuel into said inlet, said secondary nozzle element communicating with the outer end of the coil, and the said body being provided with a by-pass duct communicating with the bore thereof and said duct terminating in a chamber affording oppositely disposed valve seats, a valve member operating in said chamber 1 having oppositely disposed valve pieces adapted to cooperate respectively with the said seats, there being provided beyond the seat opposite the by-pass duct a further chamber adapted for connection with a source of air under pressure and the first-named chamber being in communication with the inner end of said coil whereby air or'fuel may be delivered into said coil as the valve pieces seat on one or the other of the respective seats.

SEDDON C. NELSON.

Images