US1542171A - Fuel-oil combustion - Google Patents

Description

June 16, 1925. 1,542,171

w. F. RAVENOR FUEL OIL COMBUSTION Filed April 22, 1924 Ivrzwog Mm fiwns m Patented June 16, .1925.

UNITED. STATESFPATEN 1,542,171 OFFICE;

FUEL-01L COMBUSTION.

Application fileaii rn 22, 1924. seriai'no. 708,153.

To all whom it may concern:

Be it known that I, WVI FR D FRANCIS RAVENOR, a subject of the King of Great Britain, and a resident of the] city of Vancouver, in the Province of British Columbia, Canada, have invented certain new and useful Improvements in Fuel-Oil Combustion, of which the following is a specification.

My invention relates to improvements in effecting the combustion of fuel oil, and the object of my invention is to provide a means whereby excessive carbon deposit is entirely preventedwhile at the same time a maximum heating efficiency is obtained from the oil.

In furnaces where the fuel oil is delivered thereinto and directed against a rough surface, such as the usual firebrick bridge and coping, the inherent residual particles or globules of oil in the flame are impinged against the rough face of the brick bridge, to which they adhere and are retained in substantially globular form, so that, being prevented from spreading, the restricted surface which they present to the flame prevents their combustion before the impingement on them of other following-up cooler particles and thus the original or underneath particles are prevented from reaching the kindling temperature. A continual repetition of this condition while the furnace is being operated results in the accumulation of a great mass of carbon and a corresponding loss in efficiency.

According to the .present invention the particles or globules of oil in the flame are, any of them, prevented from retaining their unburnt globular form, but are each diffused into a very thin film of oil so that their com; bustion is instantaneous, and a clear understanding of the invention will be obtained by reading the following description in conjunction with the accompanying drawings in which- Fig. 1 is a side elevation of a typical oil burning boiler, the furnace being shown in section.

Fig. 2 illustrates an unburnt oil globule.

Fig. 3 illustrates the globule diffused into a thin film.

Fig. 4 illustrates the curling up of the film lllustrated in Fig. 3.

Similar figures of reference indicate similar parts throughout the several views.

In the drawing 1 indicates generally the boiler, 2 the furnace, 3 the firebrick bridge and coping, and 4 the oil atomizer controlling the oil injection into the furnace. This is the usual construction and arrangement, in which the atomizer directs the oil spray forwardly and horizontally to impinge against the face of the bridge 3 resulting in the detrimental andinefiicient conditions and results as hereinbefore set forth. In the present instance, however, a tray or pan 5 of suitable dimensions is placed on the furnace hearth 6, Whichpan contains molten lead, or other molten liquid or. matter, indicated the numeral 7, either in a state of rest oragitation, havinga higher boiling temperature than that of the oil flame and a greater density than the density of the oil, a

of unburnt oil globules on the molten sur-' face they spread out and are diffused into a very thin film, as indicated in Fig. 3, due to the minimum friction offered to such diffusion by the liquid surface as opposed to the maximum friction offered by the rough firebrick surface and, curling up, as indicated in Fig. 4:, they are consumed in stantaneously, thus ensuring the utmost efficiently through quick combustion and prevention of carbon formation, a further advantage being found in that the excess air allowed in fuel oil combustion hitherto is greatly reduced due to the filming and diffusion of the unburnt oil globules.

If it is desired to further reduce the excess oxygen required for combustion a catalytic agent in powdered form, such as iron filings, is spread on the liquid surface of the matter contained in the tray 5, which effects this object without hindering the diffusion of the unburnt oil globules, since, being in a powdered form, it does not present any undue friction to the excess diffusion desired.

What I claim as my invention is 1. In fuel oil combustion, directing unvaporized oil particles contained in the flame on to a surface of liquid matter having a boiling temperature higher than the flame temperature.

2. In fuel oil combustion, directing un vaporized oil particles contained in the flame on to a surface of liquid matter having a greater-density than the density of the oil particles.

3. In fuel oil combustion, directing unvaporized oil particles contained in the flame on to a surface of liquid rn'atter having a boiling temperature higher than the flame temperatureand acglfeater density than the density of the oil particles.

4. In fuel oil combustion, directing the burning fuel on to a body of liquid matter on the surface of which is spread a pow-- dered catalytic agent. 7 I I In fuel oil combustion; directing the burning fuel on to 1 body of liqui'tina'e tei' ha ing a boiling temperature higher than the fiame tehiperatur'e on the surface of which is spread a powdered catalytic g ty p 6. In fuel oil combustion, directing the burning fuel on ti) a body of liquid matter having it greater density than the diusity of the oil on the surface of which is spread a powdered catalytic agent.

7. In fuel oil combustion, directing the burning fuel on to a body of liquid nia'tter having a boiling temperature higher than the flame temperature and 'a greater density than the density of the oil on the surface of which is spread a powdered catalytic agent.

8; In fuel oil combustion, the combination with a furnace, of a tray disposed within said furnace in which is contained a liquid having a boiling temperature higher than the flame temperature on to use surface of which the flame is directed.

9; In fuel oil combustion, the combination with it furnace, of it tray disposed within said furnace in which is contained a liqiiitl having a boiling temperitture higher than the flaine ter'np'er'tt-ure on, the surface of which is spread a powdered catalytic agent on towhich the name is directed.

Dated Vancouver, B. CL, this th day of April, 1924.

W'IL'FRED FRANCIS RAVENOR.

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