US1308137A - Apparatus fob using- powdekeb fuel - Google Patents

Description

C. I]. YOUNG.

APPARATUS FOR USING POWDERED FUEL.

APPLICATION FILED MAR. 31. IQHS.

lfiw m'fi I Patented July 1, 1919. l

WITN E55 GEES D. YOUNG, 0F ALTOONA, PENNSYLVANIA.

PARATUS FOR USING POWDERED FUEL.

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T 0 all whom it may concern:

Beit known that 1, CHARLES D. YOUNG, a citizen of the United States, residing at Altoona, in the county of Blair and State of Pennsylvania, have invented certain new and useful Improvements inApparatus for Using Powdered Fuel, of which the following is a specification.

The invention relates to means for feeding powdered fuel. The invention is applicable to locomotive or stationary practice, and has for its primary objects; the provision of an improved structure which can be applied to locomotive fire-boxes as now constructed without radical modification thereof; the provision of a feeding arran ement for giving a thorough mixture of uel and air before admission to the furnace; and the provision of a structure in which the precipitation of any slag formed in the combustion is secured, and in which the burning fuel and gases are caused to travel a relatively long and circuitous path before reaching the fire-tubes, thus insuring a complete combustion and a maximum transfer of heat to the walls of the fire-box. Certain embodiments of the invention are illustrated in the accompanying drawings, wherein The figure is a sectional view showing my invention as applied to a locomotive fire-box.

In the construction illustrated in the fig.

ure. the reference numeral 1 indicates what may be termed the water leg portion of a locomotive fire-box while 2 is the portion which may "be termed the ash-box portion of the fire-box, the inventionbeing applicable to existing types of locomotives by a slight change involving the removal of the grates and the lining of the ash-box with the fire brick 3. I

The fire-box is preferably provided with two sets of water tubes 4 and 5, the upper 7 set 4 supporting the fire arch 6 and the lower set 5 supporting the fire arch 7, theterm fire arch being used in its generic sense to mean a fire wall or bafile wall of any type whether curved in the form of an arch or not.

Leading from the front end of the furnace are the usual fire-tubes 8, such firetubes terminating at their front endsin the smoke-box. The fire-box is substantially closed so that the draft through the firetubes from the smoke box is partially depended upon to secure the feed of the powdered fuel and air. I

Extending into the rear end of the ash- Specification of Letters Eaten Patented J 1113 1, 1919.

Application filed March 31, 1916. Serial No. 88,028.

box portion of the fire-box is the air tube 9 which surrounds and is spaced away from the supply .tube 10. The supply tube 10 is flared at its rear end as indicated at 11, and into this flared end the powdered fuel is conducted by means of the screw conve er 12 or any other desired means suitable for this purpose. A plurality of converging tubes 13 lead into the flared end 11, such tubes leading at their other ends into the through such tubes and around the tubes and the coal as it drops down from above into the tube 10. The plurality of air currents at different angles is conducive of this result, and the powdered coal as it passes into the fire-box is very thoroughly mixed with the air, which promotes thorough combustion.- As heretofore indicated, the arrangement is applicable to the ordinary locomotive with relatively slight changes incident to the lining of the ash-box and the provision of the tubes 5 and arch 7 in place of the usual grates. The burning fuel and gases are caused to travel a relatively long distance before reaching the fire tubes by reason of the two arches 7 and 6, thus insuring thorough combustion, and a maximum reduction in the temperature of the gases before they pass into the fire tubes. The arrangement also assists in securing the precipitation of any slag caused by the combustion which might otherwise remain in suspension in the gases and finally be deposited supplementary air inlet space, and means for delivering air under pressure to the converging pipes.

2. In apparatus for burning pulverized fuel the combination with a fire-box having an air inlet tube projecting inwardly from the rear Wall, of an air and fuel mixing con duit extending substantially through the air inlet tube and discharging into the fire-box,

.an opening in the upper Wall of the mixing conduit through which the pulverized fuel enters, a plurality of inwardly converging air inlet pipes leading into the mixing conduit to the rear of said opening extending longitudinally thereof and spaced away from the Walls thereof to provide a supplement-ary air inlet space, and means for delivering air under pressure to the converging pipes.

3. In apparatus for burning pulverized fuel the combination with a fire-box, of an air and fuel mixing conduit discharging into the fire-box, an opening in the Wall thereof through which the fuel enters, a plurality of converging blast air inlet tubes terminating at their inner ends in a discharge nozzle, and a supplementary air inlet surrounding said tubes, the tubes with their nozzles extending into the mixing conduit to a point adjacent the rear side of the fuel entry opening.

CHARLES D. YOUNG.

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