US1546752A - Hydrocarbon burner - Google Patents

Description

J. Rol-1R HYDROCARBON BURNER Filed Aug. 11, 192] 54, a 6mm, Q 2

Gil

The How through `* ducts 13 and 18, and 14 and 22, is controlled by valve mechanisms constructed substantially as follows z-Pro jecting rearwardly of the nipple 12 and in axial alignment with the axis of the 'bore 17 and nozzle 21 is a valve socket 25 in the bore of which is a partially threaded valve stem 26 provided with the usual hand wheel 27 at its outer end; and projecting rearwardly from the nipple 11 in axial alignment with the inclined bore or duct 18 is a second valve socket 28 in the'bore of which is mounted a partially Vthreaded valve stem 29 also provided with' a hand wheel 30. To prevent leakage past the valve stems t-lie valve sockets are exteriorly threaded to receive suitable packing members 31.

In operation the valve 1'0 is mounted in any suitable 'manner best determined by the class of wor: to which it may be applied', and whenv the valve is to be used 1as abloiv torch only a handle of somesor't needfbe attached to the body of the casting. Air under pressure is supplied to the duct 14 where its velocity is controlled by the valve stem 26 which` may be moved either towards or away from "the mouth of the bore 22. The air then .flo-ws through bore 22 and opening 23 across thev mixing chamber C where the oil is atomized and driven outwardly through the outlet passage B to -the exterior of tliejvalve. It y will be noted that as'the jet'of lair crosses from the opening 23 'to the entrance of the 'outlet bore B the air in the vacuum chamber 'is exhausted whereupon the vacuum thus created will draw upon the oil feeding duct 18.y Oil, therefore, is forcibly fed vor drawn from its source o-f-supply to the 'duct'13and the volume admit-ted to the Apassage 18 `will depend upon the adjustment of the .valvev stem 29. As might be supposed the migratory movement. of the oil from the .passage 18 to the vacuum chamber A is not en masse, but the oil is rather held in suspense as lit travels in a thin `film from the outlet end of the passage 18 through the vacuum chamber A to the mixing chamber C. Thisihas been found to be true after numerous experiments in which the vacuum chamber was found to be entirely free from any deposit of oil after the siipplyofair had mained open. In assuming thisytobe the fact what actually takes place appearsto be that, with a, perfect Aadjustment .ofthe two nozzles, as heretofore explained, the amount of vacuum created in the chamber A is sutiicient to enable the 'incoming loil to expand intoa more or lessvapori'fe'rous substance which moves ata more orless rapid rate of v'speed through the 'vacuum chamber A. From'this point iii` its travel the volatile oil rushes into contactwiththe jet of air projected between the opening y l v LettersPatent is:-z been closed off, but the oil valvestill re- Vand issues from the end ofthe outlet B in the form of a highly combustible fuel. This fuel, however, will not ignite until a sufficient quantity of oxygen has been made present to support the combustion which has been found to 'take place at from two inches beyond the mouth of the outlet chamber B to substantially any distance depending upon the Arelative adjustments made in Vthe nozzles'l and valve stems.

It will be noted, therefore, that the invention resides primarily in the construction and adjustmentof the two nozzles 19 and 2l, and in order to explain briefly the result obtained by such adjustment of the parts, I might vstate. it hasbeen found possible to produce .a hydrocarbon 'flame of 350,001?. without raising the temperature 'of the valve itself, which'is due tothe fact that the combustion ofthe fuel vvdoes not take L place untilfitE ,is substantiallyV away from the nozzle. 'When this valve is used in the lire b'ox of a heatensteam boiler, or the like, a tube is placed about the apparatus so that the combustion is supported in the air drawn into the tube from t-he outside of the lire box and the air thus circulating past the valve'tends to keep. the temperature down vto normal. The combination, then, of a constantly cool imixing valve and a combustion 'chamber i which is separated from the Valve itself, does away Vwith the possibility of any c arbonv depositedin' or about. the valve, "and is Yconclusive proof thatthere isasubstantially coinplete combustion of the lfuelfas the latter combines vwith the airpiesent. Further experiments 1 have been made by supplanting liquid fuel pulverized coal which when'the particles of carbon havebeenldisas'sociated and issue from the mouth ofthe .outlet chamber may be ignited` in thejsame manner as the oil spray. 'Slo completed isl the atomization of the products'issiiin'g lfrom thevalve that the suspended part'iclesffdo notv have timeto drop before they Vbecome ignited and the combustion takes place.`

What I claim as'new 1and desire te secure 1, In a mixing valverfofffvv the character andan air'passage therein, relatively adl'Ajustablenozzles mounted in said Acasing and communicating withsaid oil'and air lpaspassage and the outer ofl said nozzles being 1n Ycommunic'atio'nwith the oil passage, a cylindrically annular vacuum chamber of a width equal' to the diameter of said yoilpassage in said outer nozzle betweeifsaidil lll) lll

passage and the terminal of said air nozzle, and a mixing (-llamber at the end of said varmlm chamber liretween the terminal ol said air nozzle and the opposite Wall of said outer nozzle.

2. A mixing valve of the Character described, comprising a easing provided With air and oil inlet duets extending toward eaeli other, a valve head the bore of which communicates with said air inlet and said oil inlet7 a nozzle adjustably mounted in said valve liead and adapted to receive oil from said oil inlet duet, a second nozzle adjustable in said valve head and extending eonceni ri :ally Within said first named nozzle and Communicating with said air inlet duet, a valve stem axially aligned with said second nozzle and movable so that ille end of the latter may form a seat Yfor the end of said stem, and a second valve stem movable towards the communicating passage between the oil inlet and the interior of said lirst named nozzle, whereby the velocity of air may loe proportioned to control the quantity of oil admitted to the space between the end of tlie second nozzle and the inside opposite Wall of tlie first nozzle.

In testimony whereof I atlix my signature.

JOSEPH ROHR.

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