US2009273A - Apparatus for dry cleaning of coal - Google Patents

Description

juiy 23, 1935. E, OTOOLE, SR 2,009,273

APPARATUS FOR DRY CLEANING OF COAL Original Filed March 19, 1931' 3 Sheets-Sheet 1 f). 69014, Jr.

gwomto o A Fully 23, 1935. E. OTOOLE, SR

APPARATUS FOR DRY CLEANING OF COAL Original Filed March'l9, 1951 3 Sheets-$heet 2 lllllJ July 23, 1935.

E. OTOOLE, SR 2,009,273

APPARATUS FOR DRY CLEANING OF COAL Qriginal Filed March 19, 1931 5 Sheets-Sheet 5 Zia $71 6 lll Patented July 23, 1935 1' 4 UNITED STATES PATENT o-FFI E] Application March 19, 1931," SerialNo. 523,904 Renewed August 25, 1933 2 Claims. (01. 209-467) deck 4,;by means of links 5. These links S-incline This invention relates to improvements in apparatus for dry cleaning of coal which will be fully explained hereinafter.

1 :One object of the present. invention is to pro -5 'vide an elongated longitudinally vibrating mem her on which is mounted a deck that is divided into several sections, whereby all of the sections vibrate in unison together. A further object of this invention is to so shape 1 the feed and delivery ends of these several sections that the feed end of one section telescopes 'athe delivery end of the adjacent section throughout a plurality of sections, whereby the said sections are arranged in close relation .and .are supported by a single vibrating member.

Another object of this invention is to arrange a bin extending longitudinal the several sections and-substantially throughout the whole length of the several sections.

A further object of the present invention is to so construct said longitudinally extending bin that its bottom forms. the top of a dust hood for the several separating sections, and to :extend from the top. of the 'bin a depending flange portion that embraces all of the said section's.

Another object of my invention is to :provide this longitudinal bin with a plurality of longi- -tudinally extending passageways, said passageways being located over the said sections and each passageway of a length substantially 'equal to the length of its section whereby several streams 'of coal to be separated are fed from the single bin.

Another object of the present invention :is to incline these several sections fromwtheir outer edges-substantially to their centerand to locate the several streams of-coal to be separated passing from the bin through these elongated passageways substantially at the centers of the several sections;

other objects of the invention will be understood from the following description.

In theaccompanying drawings: Figure -1 is a top plan view of my present im- .provement, the feed bin being omitted inorder todisclose thespecific construction .of the several sections of the apparatus.

Fig. 2 is a side elevation of Fig.- 1,-shown@part1y in section.

Fig.131isja; cross section :of Fig. 1, taken on the deck sections.

,spaces llil and -l-8 between thern'and the object, of these spaces will be referred to :furthe'ron.

tromwtheir'lower endstowards the feed' en'ds I #of the several sections which comprise the sepvaratingzportionsaof the deck. TheseseCtions G have their feed ends 1,28 .andL'Q taperedias shown. 5 5 Each of thesedeck'portionszfi is provided on opposite sides :of, its .centerxwith .forwardly'and inwardly extending riffles i0 .and' 'l l'. The feed ends also are provided with upwardly extending board members I2, which keep the'coal :on each section "-1 from flowing off. In the arrangement here shown, these board portions I2 of the sections 8 -and '9 follow the outline of the .taperedfeedends and the opposite sides of these boardsalso form a banking bar for the :perviousdeck section. .The 5 board 120i the section 6. also extends upwardly :and follows the taperedoutline ofthe :feedend The board l2 for the section"Tl-formsmeans to hold the coal fed to that section .thereon, but it does not form a banking bar .since 'itvlhas no 2 cfollowinggseparating section. However, in both the succeeding sections 1 6, 6 board 12 .does perparatus, A

,Locatedabovethe deck sectionsis a bin [.3 that extendssubstantially from end toend of-the apparatus. This bin has depending portions 14,15, and v :I 6. 7 .One depending portion for each of the 3 These dependingv portions .form

-' -I he lower ends l9=of theseveral dependingzpor- .tions i4, I5, and id of the bin l3, are opengthus 5 I forming passageways for the flow'oficoal-from the bins onto the several sections-6, 61and 6 '.to

vbe separated. These passageways :20 extend longitudinallyand are docated in themiddle of said sections, whereby the coal flowing through these 1 passageways :20 is in the :form of 'a plurality ofelongated streams. These ,-passageways :may ;=be

provided with doors -2 l depending. from "the lower perforated portions-22. -.!I-'he doors: 2i and the ..per iorated; .porti0n, 22 are fully. described :111. my

pending application Serial BNO.':52,3903,f51fi1$d March 19, 1931, and need not be further here described'as it forms no part of the present invention. When these doors 2| and the perforated portion 22 are omitted, then the depending portion 16 may extend nearer to the deck sections 6, 5

ing member 3, on which is supported a pervious 6' and 6 'the mass of coal.

- chanical means.

When it is desired to retreat the middlings, I provide the trough members 23 which are located at opposite sides of the deck portions and these trough portions have their forward ends 24 extending inward over the several deck portions. The object of these middlings return trough members 23 and 24 is fully described in my pending application Serial No. 523,901, filed March 19, 1931, and no attempt is made to fully illustrate or describe it as it forms no part of the present improvement.

The operation of this apparatus is that the coal fed to the bin I3 is divided into several elongated streams and it passes to the longitudinal center of each of the deck portions 6, 6' and 6 the same spreading in opposite directions'by gravity from the passageways 20. While this coalis being fed, the deck sections are longitudinally vibrating and owing to the inclination of the links 5 as the deck moves forward the links lift and when it moves backward the deck in part leaves the said coal andhence it is fed step by step forward. Air is at the same time fed into the air chamber 25 from a suitable air blower 2B and this air under suitable pressure flows through the pervious decks to the coal above. This'air has a tendency to lift the coal and its reciprocation or agitation due to the vibration of the deck causes a stratification of This stratification causes the heavy particles ofthe mass or those having the greatestspeciflc gravity, such as slate or refuse, .to settle downwardly and the slate is caught between the riflles l0 and H, while the lighter particles are lifted upward, which operation is well known to those skilled in this art. The slate, therefore, is at times in contact with the pervious deck and at all times is between the riflles I0 and II. Owing to this stratification of the particles of the mass the slate is moved forward step by step and the riffles causes it to move forward and upward While the lighter particles of coal, which are above the riflles, flows by gravity substantially at right angles'to the forward movement of the 7 slate and the coal flows over the edges 21 of said deck portions. This coal therefore falls from the edges of the deck into suitable chutes or receptacles 28, from which it is removed by any me- Some of the slate that is positively projected in the manner described reaches the unobstructed central portion 30 and when it reaches this unobstructed portion 30, it is further projected forward to the unobstructed portion 3| that is located back of the banking bars I2, until As described in my application Serial No. 523,901, filed March 19, 1931, the end 34 of that part 23 of said middlings return device is lower than the surface of the deck at that point and from thispoint it gradually inclines upward until the end 24 is located above the said deck. All of this is fully described in my said application.

It is well known that the middlings contain a 'very small part of coal and by providing means I to receive the middlings at 34 and to return them to the deck for retreatment this coal can be large- 1y reclaimed and saved. This, however, forms no part of the present invention. No attempt is made to show here the manner of supporting and reciprocating the middlings return members, as this is fully shown and described and also claimed in my said application. Any desired reciprocative means can be provided for reciprocating the deck and no attempt is made here to show it.

In the section, Fig. 3, the coal flows from the opposite edges of the deck into suitable chutes 35, and from these chutes it flows into the clean coal trough or other device 28, from which it can be conveyed to any desired point. A suitable chute 36 has its upper end connected with the refuse receiving member 33 and this chute is bent around the clean coal receiving trough 28 and has its lower end 31 adapted to feed the refuse into the receiving refuse receptacle 33.

Attention is also directed to an extension 38 of the dust hood. This extension embraces the end 39 of the dust hood and a suitable exhaust (not shown) communicates with'the upper end (not shown) of said extension by means of which the dust laden air is withdrawn from the apparatus and preferably conveyed to a dust cleaner (not shown) and afterwards cleaned of its dust, the cleaned air is allowed to escape. As will be seen from Fig. 2, this extension 38 embraces the discharge end of the deck portion 6 I have described with considerable detail the present improvement, but I wish it to be understood that it may be varied without departing from the scope of the invention so long as such variation comes within the liberal construction of the appended claims.

It will be understood from the foregoing description that this invention is adapted to separate all kinds of granular material which comprise elements having different specific gravity characteristics and to operate upon either sized or unsized masses of coal or other material.

Having thus described my invention what I claim and desire to secure by Letters Patent is:

1. An apparatus for the dry cleaning of coal and the like including particles having different specific gravity characteristics comprising a plurality of deck sections supported one behind the other, means connected with all of said sections for longitudinally vibrating them and a single bin arranged above the said sections and feeding coal to be cleaned thereto, and flanges depending from the upper edges of said bin downward and embracing the said sections forming dust laden chambers for each of said sections, said chambers all connected whereby the dust laden air of all the sections may be withdrawn therefrom.

2. An apparatus for the dry cleaning of coal including particles having different specific gravity characteristics comprising several deck sections arranged one behind the other, said sections having their feed and discharge ends tapered.

in the same direction and a combined banking and holding bar acting to bank the heavy refuse particles on one section and to hold the coal on the feed end of the adjacent section, said tapered ends of one deck section telescoping the adjacent end of the other deck section, and means for longitudinally vibrating said sections.

EDWARD OTOOLE, SR.

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