US660458A - Apparatus for feeding fine fuel. - Google Patents

Description

No. 660,458. A Patented ocf za, I900.

H. B. PRUDEN. I

APPARATUS FOR FEEDING FINE F UE'L.

' (Applicatiqn-fllad am 27, 1900. (No Model.)

I WITNEv I d ATTORNEYS.

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UNITED STATES PATENT OFFICE.

HARRY l3. PRUDEN, OF PITTSBURG, PENNSYLVANIA.

APPARATUS FOR FEEDING FINE FUEL.

SPEClFICATION forming part of Letters Patent No. 660,458. dated October 23, 1900.

Anplication filed January 27. 1900. Serial No. 2,987. .No model.)

To all whom, it ntay concern:

Be it known that I, HARRY B. PRUDEN, a citizen of the United States of America, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania,have invented certain new and useful Improvements in Apparatus for Feeding Fine Fuel, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to an apparatus for feeding pulverized, granular, or other finefuel to furnaces.

One object of my invention is to provide improved means for feeding coal-dust or other granulated or powdered fuel; and to this end my invention consists in the apparatus as hereinafter specified.

My invention has for its further object to provide an apparatus wherein the powdered coal-dust is automatically fed into a receptacle, said receptacle being provided with airpipes having a high pressure and being arranged in such a manner as to cause a cyclone within said receptacle and forcing the coaldust downwardly through the discharge-pipe into a bell-shaped mouth leading into the furnace.

The invention finally consists in the novel construction, combination, and arrangement of parts to be hereinafter more fully described, and specifically pointed out in the claims.

In describing the invention in detail reference is had to the accompanying drawings, forming apart of this specification,and wherein like numerals of reference indicate corresponding parts throughout the several views, in which- Figure 1 is a vertical sectional view of my improved apparatus, showing the same attached to a furnace. Fig. 2 is a detail view of the end of the discharge-pipe leading into the furnace. Fig. is a front view of the same. Fig. 4 is a horizontal sectional view of the egg-shaped receptacle. Fig. 5 is a top plan view thereof.

Referring to the drawings by reference-numerals, 1 indicates an egg-shaped receptacle, which is preferably constructed of two parts and suit-ably secured together by means of bolts 2, passing through annular flanges 3, arranged on the upper and lower sections of the receptacle.

The reference-numerals 4 and 4 represent air-supply pipes leading into the receptacle 1, the pipe at being shorter than the pipe 4;, as shown in Fig. 5, for the purpose as will be hereinafter described. Deflectingplates 5 are arranged in the interior of the receptacle and are in close proximity to the mouth of the air pipes.

The reference-numeral 6 indicates a supply-pipe having arranged therein a slide or valve 7, designed to regulate the feed to the receptacle, the upper end of said supply-pipe being provided with a hopper 8. Chains 9 are fastened to apertured lugs 10, rigidly secured to the outer casing of the receptacle, the other ends of the chains being suitably fastened to any support. These chains serve to support the receptacle and retain the same in proper position.

The referenceuiumeral 11 indicates a discharge-pipe communicating with the eggshaped receptacle at its base.

The reference-numeral 12 represents a bellmouth extension of the discharge-pipe leading into the furnace 13 and communicating with the combustion-chamber 14 of the furnace.

The operation of my improved apparatus and process is as follows: The pulverized or granulated fuel is fed into the hopper in any suitable manner and the discharge thereof regulated bythe slide or valve leading into the egg-shaped receptacle, thereby regulating the feed to the same and causing the fuel to be fed by gravity. When the latter enters the egg-shaped receptacle, the air-pressure of the air-supply pipes 4-. andft will cause the fuel to spirally rotate in said egg-shaped receptacle, as the air from the pipe 4 is deflected toward the inner face of the receptacle and the air from the pipe at is also deflected toward the inner face of the receptacle in the same path of travel, as indicated by the arrows in Fig. 4 of the drawings, thoroughly commingling the fuel with the air before the same is fed to the furnace to increase the combustion.

The herein-described apparatus is particularly adapted for boiler use, and a more intense heat is produced than by the present methods, and, furthermore, a great saving of fuel is effected in this manner.

It Will be noted that various changes may be made in the details of construction of my improved apparatus without departing from the general spirit of my invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination with the combustionchamber, of an egg-shaped receptacle, chains connected to said receptacle and to a suitable support, air-supply pipes connected to said receptacle at different sides thereof, deflecting-plates secured to the inner face of the receptacle at the discharge of each of said pipes for projecting the air from each pipe in the same path of travel Within the receptacle, a feed-pipe having a hopper mounted on said receptacle, a feed-regulating valve in said feed-pipe, and a discharge-pipe connected at its one end to the receptacle and at its other end provided With a bell-shaped mouth communicating with the combustion-chamber, substantially as described.

2. The combination with the combustionchamber, of a receptacle, chains connected to said receptacle for supporting the same,a

feed-pipe provided With a hopper for feeding fine fuel to said receptacle, a controlling-valve arranged in said feed-pipe,air-supply pipes connected to said receptacle at different sides thereof and to a common course of air-supply, deflecting-plates arranged within the receptacle at the discharge of each of said airsupply pipes and adapted to project the air from each of said pipes in a common path of travel, and a discharge-pipe connected at its one end to said receptacle and at its other end terminating in a bell-shaped mouth communicating with the combustion-chamber, substantially as described.

In testimony whereof I affix my signature in the presence of two witnesses.

HARRY B. PRUDEN.

Witnesses:

JOHN NoLAND, E. W. ARTHUR.

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