US2421006A - Hydroxylating pot type burner - Google Patents

Description

Patented May 27, 1947 HYDBOXYLATING POT TYPE BURNER i James L. Breese, Santa Fe, N. Mex., assignor to Oil Devices, Santa Fe, N. Mex., a limited partnersliip of Illinois Application November 15, 1943, Serial No. 510,303

My invention relates to an improvement in pot type burners and has for one purpose to provide improved means for delivering air to a liquid hydrocarbon burner. Another purpose is to provide improved means for supplying secondary air to the mixture of vaporized hydrocarbon and primary air, in a hydroxylating, pot type burner. Another purpose is to obtain silent combustion. Other purposeswill appear from time to time in the course of the speciiication and claims.

This invention is illustrated more or less diagrammatically in the accompanying drawings, wherein:

.Figure 1 is a vertical axial section of an embodiment of my invention;

Figure 2 is a partial vertical axial section on an enlarged scale and FigureV 3 is a section on the line 3 3 of Figure 2.

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

Referring to the drawings, I generally indicates an outer housing having a plurality of feet 2 between which are air inow spaces 3. The housing is partly closed by a horizontal partition 4 centrally apertured as at 5. 6 is an angle ring which receives the upper outwardly extending flange 8 of a burner pot 1. 9 indicates an upper portion of the housing I', which serves as a combustion chamber, or a heat radiating member. Any suitable draft means, not herein shown, may be provided for disposing of the heated gases and by-products of combustion. One end of the pot 'is partially closedl by a centrally apertured llame l ring I0. The pot is shown as having the other end closed as at II and a generally' cylindrical side wall I2 provided with a plurality of primary air inlet apertures I3, circumferentially spaced about thewall I2 and located at various distances from the closed end of the pot. Located beyond the primary air inlet apertures I3 nearest the closed end is a centrally apertured pilot baille ring I i supported on any suitable pins or supports I5. A liquid fuel is supplied to the pot alongl the pipe I6, the -rate of flow being controlled by any suitable control means generally indicated of float valve assembly with a manual control knob I8 for controlling the ilow of fuel along the pipe I6. However, it will be understood that any .suitable control means, manual or automatic, may be provided for varying the rate of flow of liquid fuel along the pipe I6 orvfor maintaining a uniform rate of flow, when a uniform rate is desired, it will be understood that whereas I have as at I1. I illustrate, for example, 'a known type 3 Claims. (Cl. 158-491) 2 shown a vertically axised pot, the pot may be horizontally axised 'or the axis may be variously inclined in relation to the vertical.

It will be understood that in pot type burners of the present type, a liquid hydrocarbon is vaporized by the heat of combustion taking place in or above the pot. The liquid hydrocarbon is admitted to the interior of the pot and is initially partially vaporized by the heat of hydroxylation taking place in the pot. As the liquid hydrocarbon is vaporized in the pot it rises and is surrounded by a i'llm'of secondary air. The radiant heat from this ensuing nal combustion supplies the remainder of the additional heat necessary to f vaporize all of the Aliquid hydrocarbon. There is a differentiation in action between the so-called primary air and the so-called secondary air admitted to the interior of the pot. With reference to the present structure, the air entering through the primary aperturesv I3,has,a different action than the aii` entering through the secondary apertures 23 and 24. All of theoxygen in the air entering through the primary apertures I3 is fully consumed in the process of hydroxylation. The oxygen in the air entering .through the secondary'apertures 23 and 24 is'only partially consumed, but all of the vaporized hydrocarbons surrounded by the secondary air are entirely consumed.

When the pot is burning at the high tire stage, combustion takes place at or near the top of the pot and the ame ows through the central aperture of the llame ring Ill and into the combustion chamber 9. The present structure provides a particularly eillcient means for supplying the secondary air and for providing a silent and eiliclent combustion. In the specic structure herein'shown I employ a pair-of rows of secondary air inlets 23 and 24 which are herein shown as inclined toward each other in such fashion as to cause the air directed into the interior of the pot from the two rows to impinge in a zone or area not far removed from the inner face of the pot wall. This slows down the llame iets. lI employ a pair of circumferential inward offsets 25, 2B. 'I'he odset 25 has a lower wall 25a which diverges inwardly from the opposed upper wall 26h of the oilset 2B. -T'he upper row of secondary air inletsv flame which is more or less slowed down by the impingement of the jets. I und it advantageous to arrange the apertures 23 and 2l in pairs, so that the'individual jets impinge against each other. I have illustrated the apertures 23 and 24 as arranged in pairs so 4that the individual jets impinge against each other. But, as in effect the rows of closely spaced holes deliver a sheet or almost continuous mass of air, matching up the individual apertures of the separate rows may not under all circumstances be necessary.- However, I find it advantageous.

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

The use and operation of the invention are as follows:

In pot type liquid hydrocarbon burners it is highly important to provide an adequate supply of secondary air to a primary mixture in such a fashion that combustion noises are substantially prevented. It is importantthat the secondary air be provided in such quantities and at such location that the final mixture will burn steadily clear back to the wall of the pot, at the point of admission of the secondary air supply. In the present structure the secondary air is supplied in impinging jets which engage at a short distance` inwardly from the wall of the pot and which provide an ample supply of secondary air at the point of admission. In practice, the form of the structure herein shown with its impinging jets, provides quiet and ecient combustion, with an ample supply of air at the base of the jet. The impingement oi the two inclined jets holds down the speed of iiow of the flame and prevents any tendency for the flame to burn away from the inner face of the pot. Thus I obtain the advantage of the admission oi the air at a relatively low rate and of the provision of an ample supply of air at the base of the secondary jet.

A primary cause of noisy combustion is the tendency of thev flame to leave the immediate vicinity of the orifice through which the air enters.

By providing impinging jets I control or limit the speed of the air jet flow, and at the same time insure an ample supply of secondary air at the base of the jet, adjacent the inner face of the pot Wall. A

I claim:

.1. A burner pot for pot type burners having an ope'n end, a circumferential pot wall, and a closed end wall, said circumferential wall having therein a plurality of primary air inlet apertures spaced circumferentially about the wall and located at various distances from the end wall, said circumferential wall having, adjacent the open end of the pot, a pair of adjacent circumferential inward insets having opposed adjacent walls inclined inwardly away from each 5 other, and having a circumferential row of secondary air inlet apertures in each of said opposed walls, the axis of the pot being generally perpendicular, and means for delivering a liquid fuel to the interior of the pot.

2. A burner pot for pot type burners having an open end, a circumferential wail, and a closed end wall, said circumferential wall having therein a plurality `of primary air inlet apertures spaced circumferentially about the wall and located at various distances from the end wall,

said circumferential wall having, adjacent the open end of the pot, a pair of adjacent circumferential inward insets having opposed adjacent walls inclined inwardly away from each other, said opposed walls of said lnsets each having a circumferential row of secondary air inlet apertures therein, the axes of the apertures of said rows of air inlet apertures converging, and means for delivering a liquid fuel to the interior of the pt.

3. A burner pot for pot type burners having an open end and a generally cylindrical circumferential wall, said circumferential wail having therein a plurality of primary air inlet apertures spaced circumferentially about the wail and located at various distances from the end wall, said circumferential wall having `adjacent wall portions located within the cylindrical outline of the pot but inclined inwardly away from each other, said inclined wall portions each having a row of air inlet apertures extending thereabout, the axes of the apertures of said rows of air inlet apertures converging, and means for delivering a liquid fuel to the interior of -the pot,

Said last mentioned rows of air inlet apertures The following references are of record in the ie of this patent:

UNITED STATES PATENTS Number Name Date 720,889 Calkins Feb. 17, 1903 2,214,693 Grotenhuis Sept. 10, 1940 2,230,276 Valjean Feb` 4, 1941 2,259,743 Fletcher Oct. 21, 1941 2,302,287 Behrendt Nov. vi7, 1942 2,116,278 Morin ---I 1---- May 3, 1938 1,940,879 Pickup Dec. 26, 1933 2,165,212 Bauer July 11, 1939 2,286,489 Jones June 16, 1942 30 2,333,478 Focks Nov. 2, 1943

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