US2337734A - Oil burner and liquid fuel inlet therefor - Google Patents

Description

Dec. 28, 1943.

J. L. BREESE OIL BURNER AND LIQUID FUEL INLET THEREFOR Filed July ll, 1941 8 72 /3 67 l WH I Lk 'e soloeeeeo/eeeeeoeeoooo O 0 D O 7 .7

t u 0 c o I 2 l 7 o o lo o /9 2 T. u1 y 9121 Q1 22 E, 20

Foa/WM Adelivering yfueltothebottomtoilthepot.

herein shown I illustrate an upwardly extending 4 Patented Dec. 28, 1943 Y l UNITED STATES PATENT OFFICE; l'

l I I v James L. Santa-Fe, N.'Mex.,xasslgnor to i! Devldes. sul Fc, N. Mex., a limited partnership oflillnois z claims. (cuss-91) My invention relates to improv xn'eans-forfl liqufueltoapottypeburnerp. Onepurpe forsiipplyingtheprimaryairwiththefuelat, thepilot stagelof the burner.

Jinotherpurposeistheprovisionofmeansem.-

`tbeprovisionofimprovedmeans 4 'pioyabiewitntnepiiotbmeinapottypebumer where the bame is set below the normal primary airsupplyto'tbeburner forsupplyingallofthev primary air necessary for the .pilot stage the fuel inlet duct. l

Other purposes will appearfrom time-to time in the course of tbe speciilcation.

I illustrate my invention more or less diagrammaticaliy in the accompanying drawing wherein:` 1.',

Fig. 1 is a vertical axial section; and 'Figa Zisasectionon the line 2-.2 ofFigrl.

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

Referring to the drawing, I indicatesa base member or drum, which may be upwardly extended, as at 2, to forma radiating or combustion chamber. 3 are any suitable supporting means therefor. 4 is a bottom member with an axial air inletl. I is a supporting angle ring adapted to receive the upper flange 8 ofa burner pot 1. 'I'he pot has a slightly upwardly concave bottomI, and is provided with a plurality of primary air inlet apertures III located at various levels in the wall of the pot. Any suitable means may be employed for supplying secondary air to o r adjacent the top of the pot. I illustrate for example a number of larger and more closely spaced secondary air inlet apertures II.

I2 is any suitable name ring having a central. 3.5

aperture I3. Il is a liquid fuel supply lineexftending to any suitable source of fuel not herein shown. I6 generally indicates a manually controllable valve.

* It will be understood that I may employ any suitable means. manual or automatic, for controlling or varying the rate of supply :oi liquid In the form downwardly turned end portion I8. It willbe understood. however.v that the size, proportion and location of the end of the pipe Il may be substantially varied. I ilnd the present form emcient. however. as supplying the liquidiuel sndwitnit'smeprimryurtomecenrprthebottoinofthepot.V A

The primary air necessary for at the pilot stage may be supplied, for example. birl the upwardly extending air inlet member Il, which is in communication with the liquidfuel :niet pipe n, as foi-'example uytne'upung ze.'

I may employ a pilotring 2l, mounted on any suitable supports air to support-combustion at the pilot stage. A

The burningrate is controlled by controlling the supply of liquid fuel, and when the valve Ii or equivalent means is set to supply a minimum or pilot volume of fuel, all the air 'necessary-,for

combustion below the pilot ring 2l enters through the inlet Iaand along the pipe I1 with the fuel.

At such stage the pilot ring 2l serves -to prevent down drafts from the upper portion 'of the pot. which would disturb the balance ofcombustion in the area below the pilot ring, and a low ilarneV is maintained with aminimum deposit of free carbon.'

It will be realized device, nevertheless many changes may be made in the size, shape, number and disposition of parts without departing from the spirit oi my invenf base I andthe pot l. The use and operation of my invention are as follows: f In pot'type burners a low turndown This low turndown may be obtained'by providing, in effect, a duplexburner with a pilot baille in a lower part of the pot. I employ the baille 2|, which is located below thelowest 'of the apertures I0 in the` pot wall. The apertures III serve 5 as primary air inlet apertures for, the full combustion stage, the secondary air -being supplied by the upper apertures II, the combustion at,

` the high stage taking place ator above4 the v ring I2. -centerofthecentral-axisofthepotandhasa It will be understood that in a so-called 'hydroxylating burner the primaryair combineswith the hydrocarbon vaporized by the heat ofcombustion to form a mixture. which in tum is finally l burned after it receives a supply of secondary air;

When the burner is operated at' low or pilot stage.v

suohas pins Il,

below the lowest row of primaryair inlets Il in the sidewall of the pot 1.. -It winne-understood -that I supply throughthe passage Il sumcientf that-whereas I have.de\\ .Y scribed and illustrated a practicaljand operative is desirable.

Y the ring 2l.

- above the level of the ring 2 l ring 2|. For the pilot stage I prefer to supply the primary air along-the d uct l1, which also serves as ,an oil delivery. duct. The passage duct' is of'sulcient cross sectional area to admit suilicientv primary air to support combustion at o about the level of the ring 2l Atthe pilot stage sufficient fuel may be supplied by the control means diagrammatically shown at I5 to'maintain pilot combustion at the level of sufficient gauge or cross sectional area to admit all the primary air necessary for the hydroxylation of the mixture. The fuel flowing in along the inlet or nozzle I1, in--the presencefofthe air admitted through the pipe I9, is subjected tothe The inlet [9 and the pipe I1 are of heat of combustion at the level ofthe pilot ring' 2I, and complete hydroxylation takes place. The- 'combustion'may take place at or above the pilot means for supplying secondary airat a level adjacent thetop of the pot, a centralapertured baille ringlocateci between the top and bottom of the'pot, and below the lowest of the primary air inlet apertures in the pot wall, a liquid fuel inlet v'member extending into the pot and into the space below said baille ring.: said inlet member having a delivery aperture located in general alignment with the axis of the pot and with the aperture of said baille and at a level closely adjacent the bottom of the pot, means for delivering liquid fuel to said fuel inlet member and means for admitting air to the interior of said liquid fuel inlet member for mixture with the fuel flowing therealong.

- 2. In combination, in a' pot type burner, a

burner POt having a circumferential wall with aplurality of primary air inlet apertures therein,

y means for supplying secondary air at a level adhydroxylated mixture then receives its secondary air through the apertures IB and is burned at or It may also happenjthat anveven lower turndown is desired, and in such event,- .with the structure as shown, it will be understood lthat combustion may take place at or near the outlet of the downturned passage portion I8 This low turndown', of course, is merely obtained by limiting the flow of fuel to a very low rate, and the small amount of fuel so delivered is mixed with the air and completely hydroxylated bythe comjacent the top of the pot,.a central apertured baille ring located between the top and bottom of the pot, and below the lowest ofthe primary' air inlet apertures in the pot wall, a liquid fuel inlet bustion taking place at or near the downwardly 'y turned end I8 of the inlet Il. l p

Iclaim:

`1. In combination, in a 4pot type burner, Aa burner pot having a circumferential wall with a plurality of primary air inlet apertures therein,

member extending into the pot and into the space below said baille ring, said inlet member having a' JAMES L. BREESE.

Images