US2346814A - Burner with false bottom - Google Patents

Description

April 18,1944.

.1. L.. BREESE BURNER WITH FALSE BOTTOM Filed July 11, 1941 O O .0 0 0 0 O O 0 0 0 0. Q 0 O O O O Patented Apr. 18, 1944 BURNER WITH FALSE BOTTOM James L. Breesc. Santa Fe. N. Men, assignor to Oil Devices, Santa Fe, N. Mex a limited partnel'ship of Illinois Application July 11, 1941, Serial No. 401,923

4 Claims. (Cl- 158-91) My invention relates to an improvement in burners and particularly in pot type burners and has for one purpose the provision of improved means for vaporizing the liquid fuel employed in such burners.

Another purpose is to provide improved means for reducing the amount of oil in the burner in the event of a continued fuel flow upon ignition failure.

Another purpose is to provide improved means for maintaining the flame in a pot type burner at the pilot stage with quiet and clean operation.

Another purpose is to provide a relatively small heat resisting vaporizing element in the bottom of a pot type burner.

Other purposes will appear from time to time in the course of the specification.

I illustrate my invention more or less diagrammatically in the accompanying drawing wherein: Fig. 1 is a vertical axial section; and Fig. 2 is a section on the line 22 of Fig. 1.

Like parts are indicated by like symbols throughout the specification and drawing.

Referring to the drawing, I is any suitable heater drum, which may have a bottom 2, having a central air admitting aperture 3 and any suitable supporting means, such as the supporting ring 4 and the ground engaging legs or spacers 5. 6 is an intermediate supporting ring extending inwardly from the wall of-the drum or housing .i. Mounted thereupon is the pot proper I, with its outwardly extending flange 8 and its top flame ring 9, having a central aperture 9a. Ill indicates the bottom of the pot.

The pot is provided with a plurality of primary air inlet apertures II. Any suitable means for admitting secondary air adjacent the top of the pot may be employed, but I illustrate for example a row of secondary air apertures l2, located beneath the flame ring 9. I3 is any suitable liquid fuel :supply line, which may extend from any suitable source of liquid fuel. It will be un derstood that any suitable means for maintaining a. normal fuel level may be employed, such as float chambers, or the like, not herein shown and not of themselves forming part of the present invention.

The fuel line I3 is shown as extending to an inlet fitting H, which may have a reduced screw threaded :portion l extending inwardly through the wall of the pot. It terminates in the nozzle i6, herein shown as cut away at the top, as at ting away. while under some circumstances advantageous, is not essential.

I8 is asupplemental vaporizing container, having a relatively low wail l9, which, however, terminates above the maximum fuel oil level, as indicated at 20. This level, as above mentioned, may be controlled by any suitable means, such as a float chamber, not hereinshown. The container l8 thus prevents any complete flooding of the bottom of the pot and substantially reduces the volume of liquid fuel in the pot in the event of an ignition failure. The supplemental container l8 may be threaded upon the reduced screw threaded portion I! of the fitting l4, and any suitable means, such as the locknut 2|, may beemployed for the-double purpose of securing the fitting H in relation to the pot I and securing the container it in relation to both container and fitting. The container It may be made of stainless steel or heat resisting material, and

since it protects the bottom iii of the pot 1, the outer pot may be made of cheaper and less heat resistant material. If desired, the bottom of the container I 8 may be spaced slightly upwardly from the pot bottom it, or there may .be at some point a supporting contact.

- 25 is an air inlet duct located in the space between the pot l and the drum I. It is employed to supply all of the primary air necessary for the hydroxylation of all the fuel supplied at the pilot stage. The fuel which is vaporized by the heat of combustion within the chamber l8 at the pilot stage is mixed with this primary air supply and delivered as a dry gas and burned at or near the to evaporate the liquid fuel necessary for combustion. I have determined, however, that the space need not include all of the bottom of the pot. For example, in a burner pot having a 13" diameter, I find that a bottom with an 8" diameter is ample for all of the fuel necessary for even the highest stages of combustion. By using a small bottom. higher temperatures may be obtained, which makes it possible to use lower grades or fuel.

Also, a small burner bottom can be made of a heat resistant metal without going to the expense of having the whole burner bottom-made of a more expensive material or a material more diiiicult to work.

It will be realized that, whereas I have described and illustrated a practical and operative device, nevertheless many changes may be made in the size, shape, number and disposition of parts without departing from the spirit or my invention. I therefore wish my description and drawings to be taken as in a broad sense illustrative or diagrammatic, rather than as limiting me to my precise showing.

I claim:

1. In combination, in a pot type burner, a burner pot having a bottom and a side well, said side wall having a plurality of air inlets located at various levels, an open topped separate supplemental container within said pot, having a bottom and a side wall, said container being positioned above the bottom of the pot, the bottom of the container-being closely adjacent to and overlying the bottom of the pot, a liquid fuel supply pipe extending to said pot, and a liquid fuel nozzle in communication with said pipe, said nozzle being located within said supplemental container and being spaced above the bottom thereof, the diameter'of said supplemental container being substantially less than the diameter of the pot, said supplemental container abutting against the side wall of the pot, and the liquid fuel nozzle extending into the container adjacent the point at which the container abuts against the pot.

2. In combination, in a pot type burner, a burner pot having a bottom and a side wall, said side wall having a plurality of air inlets located at various levels, an open topped separate supplemental container within said pot, having a bottom and a side tom of the container being closely adjacent to and overlying the bottom of the pot, a liquid fuel supply pipe extending to said pot, and a liquid fuel nozzle in communication with said pipe, said nozzle being located within said supplemental container and being spaced above the 5 bottom thereof, the diameter of said supplemental container being substantially less than the diameter of the. pot, and said liquid fuel nozzle being horizontal and open at the upper side whereby the contents. of the nozzle are directly subjected to the radiant heat of combustion taking place above the nozzle.

3. In combination," in a pot type burner,,a burner pot havinga bottom and a side wall, said side wall having a plurality of air inlets located at various levels, an open topped separate supplemental container within said pot, having a bottom and .a side wall, said container being positioned above the bottom of the pot, the bottom of the container being closely adjacent to and overlying the bottom of the pot, said container being of substantially smaller diameter than the pot and closely approaching the side wall of the pot at one, point, and means ic. 1',

delivering to the interior of the container the 5 entire supply of'liquid fuel for the pot. 4. In combination, in a pot type burner, a burner pot having a bottom and a side wall, said side wall having a plurality of air inlets located at various levels, an open topped separate sup- 30 plemental container within said pot, having a bottom and a side wall, said container being positioned above the bottom of the pot, the bottom of the container being closely adjacent to.

and overlying the bottom of the pot,.said con- 5 tainer being of substantially smaller diameter than the pot .and closely approaching the side wall of the pot at one point, and means for delivering to the interior of the container the entire supply of liquid fuel for the pot, the upper wall, said container being positioned above the bottom of the pot, the botedge of said container being located in a plane lower than the lowest of the air inlets in the side wall of the pot.

JAMES L. BREESE.

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