US 1307365 A
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Description (OCR text may contain errors)
A. G. KINYUN.
DEVICE FUR AERATING POWDERED FUEL APPLICATION man ma; A1. um,
UNTED STATES PATENT FFYLCE.
ALONZO G. KINYON, OF CHICAGO, ILLInoIs 'AssIGNo'n 'ro Pownnnnn COAL ENGI- NEERING a EQUIPMENT COMPANY, or CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE. i
DEVICE ron AERATING Pownnnnn FUEL.
Specification 0f Letter Patent Patented June 24, i919.
Application led December 4, i917. Serial No. 205,395.
To (dl whom. 'it may concern:
Beit known that I, ALONZO Gr.l KINYON, a citizen of the United States, residing at Chicago. in the county of Cook and State of Illinois,` have invented certain new and useful improvements in Devices for Aerating Powdered F nel, 'of which the following is a specification.
In devices of the character to which my invention relates it is the aim and purpose to separate as far as possi-ble each of the finely divided particles of fuel from the others, surround it completely with air sufiicient in quantity for its combustion and support it-in the air until it emerges from the burner wherethe mixture of fuel and air is raised to atemperature at which combustion takes place. The purpose of nii/,invention is to provide means` by which vthis aeration of the fuel and the supply of particles with air necessary for its perfect combustion is more efectively accomplished than in the devices of the prior art.
In the accompanying drawings l have shown and in the following specification described in detail the preferred form of my invention. It is to be understood, however, that the specific disclosure is for the purpose of exempliication only, the scope of the invention being defined in the following claims, in which I have endeavoredto dis tinguish itfrom the priorl art so far as known to me without, however, relinquishing or abandoning any portion or feature thereof.
Referring to the drawings Figure 1 is a side elevation of a device embodying my invention with a portion of the wall of a furnace to which it is applied shown in section; Fig. 2 is a vertical section on an enlarged scale of said device; Fig. 3 a transverse section on an enlarged scale on the line 3-3 of Fig.. 2; F ig` 4 a longitudinal vertical section on the line 4 4 of Fig, 3; Fig. 5 an elevationof a detail; Fig. 6 a transverse vertical section enlarged on the'line 6 -6- of Fig. 2; Fig. 7 an enlarged transverse section on the line 7-7 of Fig. 2; and Fig. 8 a detail elevation of the same part.
Referring to Fig'. l -the furnace wall -9 is formed with a burner vopening 10 to which a conduit 11 leads from my improvedaerating device. The aerating Adevice proper Is shown at 12 and receives. finely powdered lopening into the bottoni thereof at 1S. The
coal .or other powdered fuel is fed through the conduit 17 by a screw conveyor 19 which also forms a means for supplying a certain proportion of the air to be mixed with the y fuel, being made .hollow for this purpose. Conveyor 19 extends beyond conduit 17 in which it is packed at 20 and the, conveyer is rotated by means of a beveled pinion 2l thereon driven from a jack shaft 22 which may be rotated b v any suitable motor and transmits motion to the fan by belt pulleys 23, 24 and holt 25.
As heretofore stated the tubular screw conveyer 19 is providedfwith a worm only for'that portion thereof within the conduit 17, but is extended beyond the conduit into the mixing chamber where it is perforated and provided with burs, teeth oi' pro3ect1ons which serve to agitato the mixture of an' and fuel in the mixing chamber and more thor oughly intermingle 'the same. The perforations 26 immediately adjacent the end of the screw port-ion of the tubular conveyerl are substantially perpendicular to the axis of the tube, but the perforations beyond are inclinedwith reference to said axis in a direction to project the air in series of jets inclined outwardly with respect to said conveyer and forwardly toward the burner. The construction will be best understood by reference to Figs. 3, 4 and 5 in which the inclined openings 27 are shown arranged in circular series and each providcdwith a bur or blade 28 correspondingly inclined. The end 29 of the conveyer may he 'perforated as at 30 for the purpose of propelling iets of air to direct the mixture toward the burner. A further supply of air is'provided' hy surrounding the mixing chamber with an annular air chamber 31 which receives its supply from the fan by the by-pass 32.v Communication between the annular air chamher andthe mixing chamber is provided by striking up from the metal wall of the mixing chamber inwardly projecting tongues 33 leaving openings 34 in said Wall.
In operation the coal `is fed orwardiy in the conduit 17 by the screw conveyer 19 until -it reaches the mixing chamber where it is impinged upon by the radial jets issuing through the openings 26 in the tubular conduit, the air being supplied by the fanas previously described. T he air mixes with the powdered fuel which is then carried on toward. the burner and past the inclined iet openings in the eonveyer, constantly receiving additional supplies of air. The inclined forwardly directed openings cause a constant suction and movement of the mixtum of fuel and air toward the burner. Not only is the fuel supplied with additional air through the openings 27 in the conveyer, but also receives supplies of air from the annular chamber through the openings 34:, the blades or tongues'33 of which also have the effect of directing the entering air forwardly toward the burner as well as inwardly. The blades or tongues 33 and the teeth or burs Q8 having relative rotary motion serve to cut and break up the streams of mixed air and fuel moving toward the burner, effectually preventing any massing together of the particles of coal and insuring the segregation of the individual particles andthe surrounding thereof with an envelop of air of combustion.
1. In a device of the class described, an elongated mixing chamber', a conduit connected to one end thereof, a hopper opening into said conduit, a. tubular conveyer in sai conduit and mixing chamber, said conveyer having a Worm in said conduit and perforated in the mixing chamber, teeth on said conveyer in the mixing chamber, means for rotating the conveyer, and all exhaust conduit leading from the end of the device opposite that to which the hopper is connected.
2. In a device of the class described, an elongated mixing chamber, a conduit con nected to one end thereof, aI hopper opening into the conduit, a tubular conveyer in said conduit and mixing chamber, said conveyer having a worm in the conduitand being perforatedrin the` mixing chamber, teeth overlapping the respective pcrforations in the conveyer, said teeth being directed ontwardly toward the exhaust end of the mixing chamber.
3. In a device as described in claim l, the
combination with the mixing chamber of an air chamber surrounding the same, the wall between; the air chamber and mixing chamber being perforated, and means for supplying the air chamber with air under presd. In a device of the class described, a mixing chamber having an outlet at one end thereof, a conduit connected tothe other end thereof, a. hopper communicating with the conduit, a hollow conveyer in the conduit extending into the mixing chamber, a, screw on the conveyer, means for rotating the conveyor, said conveyer being perforated within the mixing chamber, the perforations being inclined toward the outlet of said chamber, teeth overlying the respective perforations and directly outwardly and toward the exhaust end of the chamber, the wall of the mixing chamber being perforated, an air chamber surrounding the perforated portion of the Wall of the mixing chamber, and means for supplying the air chamber with air under pressure.
ALONZO e. xrNYoN. i