US2194135A - Burner for liquid fuel - Google Patents

Description

March 19, 19 40.

J. L. BREESE BURNER FOR LIQUID FUEL Filed March 14, 1938 6 b ojoooodooooboooooooou :3 7 Y 1 Jame 5 [.Zreeje AM TR S Patented Mar. 19, 1940 v i I I UNITED STATES PATENT OFFICE BURNER FOR mourn FUEL James'L. Breese,- Santa Fe, N. Mex., assignor, by

mesne assignments, to Motor Wheel Corporation, Lansing, Mich., a corporation of Michigan Application March 14, 1938, Serial No. 195,725

7 Claims. (Cl.-158'-91) My invention relates to an improvement in vaporized by the heat of combustion and to liquid hydrocarbon burners and has for one puran incombustible or partly combustible mixture. pose the provision of improved means for per- This mixture-rises up in the pot 7 until it meets mitting the maximum turndown or flame variathe secondary air Which flows through e p tion: tures I3. This secondary, air renders the mix- 5 Other purposes will appear from time to time me fully combustible and at full d 0 q d in the courseof the specification and claims. y c bo bu o a es place in a '1 illustrate my invention more or less dlagramfl e ri in p d y through the p u 15 matically inthe accompanying drawing wherein; and at d Primarily a e e bafl e I4;

'10 Figure l is a vertical axial section with the In burners of this type it is often desirable,

baflle plates shown in elevation; however, to turn the burner down low to get in Figure 2 is a sectionon the line 2-4 of Fl effect a pilot combustion oi little or no effective ure 1 of the fire pot with'the baflle plates shown heating value but for the pur of maintainin elevation; ing combustion during periods of low use or non- Figure 3 is a plan view of the balile plates; use when the valve structure I l is turned to ad- 16 Figure 4 is a view-of a variant form of the 0f the liquid hydrocarbon t0 the device; and bottom 8. When the user wishes to increase the Figure 5 is a section taken on the line 5--5 of flame he has merely to increase the flow of liquid Figure 4. hydrocarbon. This provides a larger body of Like: parts are indicated by like symbols :liquid hydrocarbon in the body 8 which in turn go throughout the specification and drawing. pr v d s a lar r volume of vaporized hydr ar- Referring to the drawing, I generally indicates bon and moves the zone of combustion up to the an outer drum or housing .having a bottom 2 top of the pot'l or primarily above the baifle M. with an air aperture 3 and any suitable support- However, when a minimum of the liquid hydroe 5 ing legs 4'. 5 is an intermediate transverse ancarbon is being received oh the bottom 8', the g5 0 trate the flame andalso to prevent down drafts nular flange adapted to receive the downwardly upper row of holes I2 act as supplies for secturned channeled edge flange 6 of the fire pot or ondary ir and Q y the t m w P r mixing .chamber I which has a concave bottom 8 thereof acts as a P y pp yand an inlet member 9 for the liquid hydrocar- In order to prevent down drafts or eddy curbon which maybe controlled by any suitable rents, I fi it desirable to PrOVide the heme 80 valve means herein shown at Ill. plates herein shown. I illustrate for example two Since the details of the valve structure do not arcuateplates IE, 11 oppositely located in the of themselves form part of the present invenmember 1 and oppositely inclined with relation tioni' a handle valve control member II is illusto each other. These may be flat as shown in tra'ted. It will be understood that any suitable Figure 1 or may be somewhat spiraled, the spe- 35 valve or control means may be employed for cific shape of the plates being a matter of choice. controlling the flow of liquid hydrocarbon into Flat rings. are perfectly practical, however, as. the member I where it is received by the bottom long as they are arrangedin opposition as shown portion. 8. in Figure 1. They may be of a variety of lengths e' of the member 1 provlded with a of are but I find that plates of in the neighbor- 40 rows of famy sparsely arranged hood of one hundred eighty degrees of are are mary mle-t apertmfes generally iPdicated as satisfactory. It may be worth while-under some i i ig :32: 321 223 3 32 5: i circumstances to make them ofsomewhat greater ployed. Secondary air is admitted through the 53 32 322 so that the ends overlap as shown upper row l3 of closely .spacedand upwardly We a: ere rattan: Hlisa suitableannula baih withacntrl mg esepaesm S my r e e a central support l8 with a species of a erture I5 which serves to define and concenample p bottom enlargement or foot l9. A transverse rod of air from the space above the ring ll. Support 29 y be mounted in the op of the In burners of this type when they are burnmember l8 and the two plates I6 and I! may be ing at a normal or fairly high rate of combussecured to the rod 20 in any suitable fashion. tion, the apertures l2 serve to admit primary 1 illustrate in Figures 4 and 5 a variant form 55 air which mixes with the hydrocarbon being of the device in which I employ two baiiles 3B, 55

- the upper corners of the baliles, 33 for the lower corners, and 34 for the intermediate por tions'. The projections 32 and 83 may be so' formed as to limit or position each of the ballle members 30, 3| whereby they are properly located not only in relation to the height of the burner but in relation to the circumference. It will be understood, of course, that the baiiles 1'6,

llof Figures 1, 2 and 3 may be similarly supported and I therefore wish it to be understood that each of the supporting means herein described may be applied to any of the various forms of baflle herein described.

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

I claim:

1. Combustion apparatus comprising a hydrocarbon burner of the vaporizing pot type, said burner including a mixing chamber having a plurality of air inlet apertures in the wall thereof located in a plurality of vertically spaced horizontal rows, means for admitting a liquid hydrocarbon to the mixing chamber, and baflle means located intermediate the top and bottom of said mixing chamber, said baiiie means including a pair of diametrically opposed arcuate plates having an arcuate length of approximately 180 degrees and arranged to form a central aperture between the upper and lower portions of the mixing chamber, each of said plates being arranged so that the plane thereof intersects the plane of 'the other plate within the confines thereof and intersects at least one 'of the horizontal rows of air inlet apertures.

2. Combustion apparatus as defined in claim 1 wherein the radially outer edge of each plate conforms generally to and closely approaches the inner face of the mixing chamber wall. 3. Combustion apparatus as defined in claim 1 wherein the lowermost edge of each pla'te lies in substantially the same horizontal plane as the lowermost edge of the other plate.

4. Combustion apparatus as defined in claim 1 wherein the uppermost edge of each plate is 'iflaced a substantial distance above the lowermost edge of the other plate. I

5. Combustion apparatus comprising a hydrocarbon burner of the vaporizing pot type, said burner including a mixing chamber having a plurality of vertically. and horizontally spaced air inlet apertures in the wall thereof, means for admitting a liquid hydro-carbon to said mixing chamber, and baflie means being located intermediate the top and the bottom of said mixing chamber and including a pair of diametrically opposed 'a-rcuate plates having an arcuate length of approximately 180 degrees arranged to form 'a central aperture providing communication between the upper and lower portions of the mixing chamber, each of said plates being inclined to the horizontal and arranged so that the plane thereof intersects the plane of the other plate within the confines thereof whereby there are more air inlet aperatures below the upper edge of each plate than there are below the lower edge of each plate.

6. Combustion apparatus as defined in claim 5 wherein the lowermost edge of each plate is positioned near the level of the lowest of the air inlet apertures and the upper edge of each plate is located a substantial distance above the level of the lowest of said. apertures.

7. Combustion apparatus as defined in claim 5 wherein the means for admitting liquid hydrocarbon -to said mixing chamber includes a fuel inlet opening in the wall of the mixing chamber adjacent the bottom thereof and wherein the lower edge of one of the said plates is arranged above and closely adjacent to said fuel inlet "opening.

JAMES L. BREESE.

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