US1859560A - hartshorn - Google Patents

Description

May 24, 1932. s. D. HARTSHORN APPARATUS FOR PREPARING GQAL Filed March 28, 1929 INV ENTOR Patented May 24, 1932 UNITE STATES STANLEY :0. naarsnoan, on sat. DAVIDS,

lssaset PATENT ina PENNSYLVANIA, ASSIGNOB TO PENNSYL- VANIA GEUSHER COIHPANY, OF NEW YORK N. Y., A CORPORATION OF NEXV YORK APPARATUS non PREPARING COAL Application filed March 28,1929. Serial No. 350,704.

My invention relates to certain improvements in the operation of coal-breaking structures familiarly knowna-s Bradford breakers, instances of modern type of such breakers being disclosed in the patents of Borton and application filed of even date herewith. The general manner of operating thesebreakers being well-known, it is unnecessary to refer to the'same except in general terms. The coal to be reduced in size is introduced at one end of the breaker, carried up by a series of shelves, and advanced by a series of defiectors. Any foreign material, in the form of tramp iron, sulfur balls, slate, etc.,

usually accompanying the coal, is delivered from the end of the breaker opposite the feed end, while the prepared coal passes through apertures in the plates making up the wall of the breaker. V

If thecoal undergoingpreparation isdry or comparatively so, little difficulty is experienced in the operation of breakers of this type. If the coal is wet, however, the surface or free moisture present causes the fines accompanying the coal and found in practically all instances of bituminous coal intended for preparation by passage through a breaker of this type to clog the apertures of the plates making up the walls of the breaker, and -materially reduces the active portion ofthe same. In practice, it has frequently happened that two. or more rows of plates will become completely clogged during "operation on wet coal containing fines; necessitating frequent stoppage for the purpose ofv removing this clogging material fromthe apertures of the breaker wall.

The object of my invention is;to prevent this clogging of the apertures in the walls of the breaker drumand to this end'I propose to screen from the coal fed to the breaker drum substantially all of the fines accompanying the same. For this purpose I replace the usual feed chute with a movable or vibrating screen, which screen receives the material from the car or other container and subjects it to a more or less violent shaking operation for the purpose of removing the fines therefrom. The tines so removed may be delivered to the same conveying means that serve to carry away the'prepared coal which has passed through the apertured V .walls 'of the breaker. Hillel, and Hiller, Nos. 1,086,129, and a 1,322,568, respectively, and in my companion Various forms of screens serving as feedmg means, and varlous forms of mechanism for operating the same may be employed within the scope of my invention. I

' These and other features of my invention are more fully described hereinafter; refer ence being bad to the accompanying draw ings, in which: I

Figure 1 is aview in side elevation of a breaker of the Bradford type enclosed in a housing usually employed in the use of the same; such view being partly in section on the line II, Fig. 2, and

Fig. 2 is an end elevation of the breaker structure and housing illustrated in Fig. 1, looking in the direction of the arrow a, and partly broken away. I

Thebreaker drum, which may be made up of end frames .or'spiders, 1, 1, longitudinal members 2, and a seriesof apertured plates?) connected to said longitudinal members' and forming the wall (or walls) of such drum, is shown in Fig. 1 as mounted in a housing structure indicated generally at 5. Breaker structures of the Bradford. type are carried by stub shafts at each end; indicatcd at 6 in the present instance and forming trunnions which may be mounted in suitorder-that thesebreaker structures maybe driven, one end of the same is provided with gear sections 9, annularly arranged, with a driving pinion (not shown) in engagement therewith.

' At the feed end of the structure, instead of delivering the coal from the car or other container to a feed chute for passage to the interior ofthe drum,I interpose a suitable form of screen 12 which may be of the shake 1 In the present instance, I have shown leaf springs 13 having slotted ends -supp0rtingthe screen, with a rotating eccentric member (or members) 14, driven in any suitable manner for the purpose of agitating the screen by lifting the same; the springs serving to e rfect return movement of the screenf'T he "eccentric member (or members) 14 may be carried by a shaft 15 having a pulley wheel or other rotatable power transmitting member 16 connected by a beltor otherwise to a prime mover. Other forms of screens and other op crating means are within the scope of my 1nvention.

The coal to be broken with-the accompanying fines is delivered from the car or other container to a hopper 17, which may be located directly above the screen 12; such screen being moved more or less rapidly depending upon the quantity of fines accompanying'the coal. As a result of this operation, the coal delivered to the breaker is in lump size minus the fines and is, therefore, in better shape to 'beprepared by the normal operationof the breaker structure. As the entire bodyoffines has been removed from the lump coal prior to its entrance to the breaker, all danger of the wet tines clogging the apertures of the 7 plates making up the wall of the breaker is avoided.

Below the housing enclosing the breaker I may provide a conveyer of any usual type, indicated diagrammatically at 18, and the coal passing through the breaker maybe re-' ceived thereon. This housing is extended beneath the screen so that the fines removed from the coal subsequently passing to the breaker may be received on the same conveyer. It will be understood that the fines possess'the same fuel value as the coal prepared in the breaker; the ob]ect 1n rem'ovmg them from the coal subsequently brokenbeing' to increase the efiiciency of the breaker by preventing the clogging of the apertures 1n the wall of the same through which the broken coal passes.

vVhIle i have illustrated and described certain specific forms of mechanism and an arrangement thereof intended to function for the, desired purpose, it will be understood that I do not wish to be limited to the precise mechanism illustrated nor the exact manner of associating the parts employed for carrying out the method or process of preparing coal constituting the subject of my invention.

I claim:

1. The combination with. a rotating coal breaker of the Bradford type, of a movable screen over whichthe coal is delivered for passage to the breaker structure; said screen serving to remove the fines, means for imparting movement to sand screen, and a housing for said breaker and screen extending beneath the latter and receiving the fines and broken coal. 7

2. The combination with a rotating coal bneaker ofthe Bradford type, of an inclined screen over which the coal is delivered for passage to the breaker structure, means for agitating the'screen; said screen serving to remove. the fines, and a housing for said breaker and screen extending beneath the latter and receiving the fines and'broken coal.

3. The combination with a rotating coal breaker, of a movable screen over which-the coal is delivered for passage to the breaker structure; said screen serving-to remove the fines, means. for imparting motion'to said screen, collecting means for said broken coal and fines, and a common receiver movable beneath said collecting means.

4. The combination of a rotating coal breaker of the Bradford type, a vibrating screen disposed ahead of such breaker and over which the coal is delivered for passage thereto; said screen serving to remove the ;fines,-means for imparting motionto said screen, means for imparting rotative move-i117 ment to said breaker, and a housing for breaker and screen extending beneath the latter and receiving the fines and broken coal. i

5. The combination with a rotating coal breaker of "the Bradford type having apertured plates through which prepared and sized coal may be discharged, of ascreen for the removal of fines from such coal prior to its delivery into the breakingchamber, means; for agitating said screen during passage of the coal, andv common means for carrying off the fines and the/prepared coal delivered from' the breaker structure.

' 6. The combination with a rotating coali s breaker of the Bradford type having apertured plates through which coal prepared and slzed by breaking may be discharged, of a screen for theremoval ofrfines from such coal prior to its delivery intothe breaking chamber, means for agitating said screen during passageof the coal over the same, a common conveyer belt for carrying off the fines and prepared coal, and separate 'chutesfor delivering the brokencoaland fines to said' belt. f p r In witness whereof 'I'ihave signed this specification; I

I STANLEY D. HARTSHORN;

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