US1548126A - Apparatus for feeding pulverized fuel - Google Patents

Description

Aug 4, 1925.

W. R. FIELD APPARATU FOR FEEDING PULV'ERIZED FUEL Fild Feb, 9. 1921 Patented Aug. 4, 1925.

UNITED STATES WILLIAM FIELD, or nnce'run, ILLINOIS.

APPARATUS son FEEDING PULVERIZED FUEL.

Application filed February 9, 1921. Serial mi. 443,642.

To all whom it may concem:

Be it known that I, WILLIAM R. FIIIBLD, a

I citizen of .the United States, residing at Decatur, in the county of Macon and State of Illinois, have invented certain new and useful Improvements in Apparatus for Feeding Pulverized Fuel, of which the following is a specification. I

This invention relates to apparatus for burning pulverized fuel and particularly to improvements in apparatus for feeding the pulverized fuel.

Difliculties arise in feeding pulverized fuel to fuel burners because of the tendency of the fuel, even when dry to pack in the storage tank, and because of its tendency to arch. This interferes with the regular and uniform feed of the fuel and causes either a diminution in the rate of feed or what is known as flooding whenever an arch in the fuel breaks. v

The invention has for an object to provide improved apparatus for feeding pulverized fuel which will be simple and inexpensive in construction, and reliable in operation.

A further object is to provide apparatus of this character in which the feeding of the fuel will be re I lar and uniform and in which arching an flooding of the fuel will be'prevented, I

A still further object is to provide a novel and improved means 'for varying the rate of feed of fuel. Y I v The invention consists in the novel arrangements, constructions and combinations to be hereinafter described and claimed, for carrying out the above stated object and such other objects as will appear from the following description.

The invention is illustrated in its, preferred embodiment in the accompanying drawing, in which Figure 1 is a perspective view of a storage vessel and the feeding apparatus.

Figure 2 is a vertical section thereof.

Figure 3 is a horizonal section taken onthe line 33 of Fig. 2, and

Figure 4 is'an enlarged detail view, being a vertical. section showing the means for preventing leakage.

Like characters of reference designate like parts in the several figures of the drawing. In the drawings, 10. designates a fuel storage or supply tank, sup rted on suitable supports 11 and prefera 1 having at the bottom thereof a neck 12 o restricted crosssection and preferably cylindrical in form. The bottom of the vessel is open, as indicated at13, and the lower edge of the neck 12 is provided with a downwardly and inwardly inclined flange 14. Placed across the opening 13 is a horizontal revoluble disk 15 suitably supported by a vertical, revoluble shaft 16. The disk is provided with a central recess 17 for receiving the upper end of the shaft 16. The shaft and disk are connected r1g1dlytogether in any suitable'manner, so

that the latter may be rotated .bythe former.

Suitable mechanism for rotating the disk 15 at a proper speed is provided.

Arranged coaxially with the shaft and disk is a cone 18 having depending from the lower edge thereof a circular ring 19 which rests on the disk. The cone and ring are secured in place on the disk so as to rotate therewith by means of a bolt 20 which screws into a vertical hub 21 and clamps the cone and ring firmly in place, the hub 21 being preferably formed integrally with the housin of the recess 17.

I The upper surface of the cone is provided with a plurality of ribs 22 which are preferably inclined' in the direction of rotation of the disk. As illustrated, the disk is adapted to rotate in a clockwise direction.

A swinging feed gate23 is provided in theside wall of the neck 12 adjacent the disk.

age of fuelover the top of the gate, the I latter, is provided with a guard or cover 25 which contacts with the upper edge 26 of the gate opening 27 Preferably, packing material 28 is provided along the u per edge 26 and contacting with the. guar 25 to insure againstleakage. .The gate 23 is hinged along the vertical edge 29 so as to be adjustable and the cover 25 thereof is provided with a pluralit 'of openings 30 into which a pin 31 may inserted for securing the gate in adjusted position.

' A win or scraper 32 secured to the lower edge of t e neck 12 and contacting with the rotating disk is provided for scraping or guiding off the fuel fed through the ate onto the outer margin 33 of the disk. The

scraper is set at an angle to the direction of motion of the disk at that point so as to guide the fuel tothe outer edge thereof.

ita'ble means such as a chute 34, is pro- -vided f r receivmgthe fuel from the disk and.

for directing it to the fuel burner. The fuel may be carried to the burner in any desired manner, either by a current of air or some mechanical conveying means. Such means form, however, no part of the present invention. It is sufficient to note that any suitableconveying means may be employed with the feeding apparatus.

' 0pemtion.-Pulverized fuel may be placed to any desired level in the vessel 10. In the arrangement shown the disk is rotated at a uniform rate in a clockwise direction. The ribs 22 on the rotating cone serve to cut down the fuel into the annular space 24 so as to maintain a constant head at this point. The friction of the fuel on the disk rotates the fuel in the annular space 24 with the disk so that a portion thereof is discharged through the gate opening, depending upon the position of the forward edge 35 of the gate. If a greater rate of feed is desired, the gate is moved inwardly. The inclined flange'll reduces the pressure or head of fuel on the disk adjacent the edge of the flange and prevents any substantial leakage of the fuel around the lower edge of the Vessel. The ring 19 also prevents arching of the fuel between the inclined flange 14 and the 'cone. By maintaining the annular space 24 full of fuel both flooding and diminution in rate of feed are prevented.

It is not necessary to provide variable speed mechanism for rotating the disk. Any adjustment in the rate of feed of the fuel may be easily accomplished by adjustment of the gate.

' I claim:

1. In apparatus of the class described, the combination of a storage vessel open at the bottom, a rotatable disk across said bottom, an adjustable feeding gate hinged to extend into said vessel adjacent said disk, and a laterally projecting guard on the top of said gate for preventing leakage of fuel over the same.

2. In apparatus of the class described, the combination of a storage vessel open at the bottom, a rotatable disk across said bottom, an adjust-able feeding gate in the side wall of said vessel adjacent said disk and extending into said vessel, a cover on the top of said gate and packing in said vessel across the top of said gate opening and cooperating with said cover for preventing leakage of fuel over the top of said gate.

3. In apparatus of the class described, the combination of a storage vessel the bottom formed with an inwardly beveled flange around its lower edge, and aving a discharge ogening in its side wall adjacent said lower e ge, a horizontal, rotatable disk across said bottom, means for rotating said disk and a feeding gate for opening and closing said discharge opening to control the discharge of fuel.

4. In apparatus of the class described, the combination of a storage vessel having a feeding neck at the bottom thereof, said neck being open at its lower end and having a downwardly inclined flange around said opening, a rotatable disk across said opening and extending beyond the sides of said neck. means for rotating said disk, a cone in said neck coaxial with said disk and haying a ring depending from the lower edge thereof and resting on said disk. means connecting said cone to said rotatable disk so that said cone and disk rotate together, ribs on said cone for cutting into the fuel in said vessel, a feeding gate in the side of said neck and extending into said vessel adjacent said ring, and means for adjusting said gate.

5. In apparatus of the class described, the combination of a storage vessel having a feeding neck at the bottom thereof, said neck being open at its lower end and having a downwardly inclined flange around said opening, a rotatable disk across said opening and extending beyond thesides of said neck, means for rotating said disk, a cone in said neck coaxial with said disk and having a ring depending from the lower edge thereof and resting on said disk, means connectin said conev to said rotatable disk so that said cone and disk rotate together, ribs on said cone for cutting into the fuel in said vessel, a feeding gate in 'the side of said neck and extending into said vessel adjacent said ring, means for adjusting said gate, and means for removing the fuel discharged through said gate from said disk.

6. In apparatus of the class described,

the combination of a storage vessel havin a feeding neck at the bottom thereof, sai

neck being open .atits lower end and having a downwardly inclined flange around said opening, a rotatable disk across said opening and extending beyond the sides of said neck, means for rotating said disk, a cone in said neck coaxial with said disk and having a ring depending from the lower edge thereof and resting on said disk, means connecting said cone to said rotatable, disk so that said cone and disk rotate together, ribs on said cone for cutting into the fuel in said vessel, a feedin gate in the side of said neck and extending into said vessel'adjacent said ring, means for adjusting said gate, and a stationary scraperengaging the upper surface of said disk for removing the fuel fed through said gate.

. WILLIAM R. FIELD.

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