US1449169A

US1449169A - Apparatus for producing, separating, and feeding powdered coal

Info

Publication number: US1449169A
Application number: US488900A
Authority: US
Inventors: Ernst H Elzemeyer; Paul S Knittel
Original assignee: Individual
Current assignee: Individual
Priority date: 1921-08-01
Filing date: 1921-08-01
Publication date: 1923-03-20
Anticipated expiration: 1940-03-20

Description

Ma?. Z, 31.923.. l

- E. H. ELZEMEYER ET AL APPARATUS FOR PRODUCING,

, y AND FEEDING POWDERED COAL SEPAR 'ATING Filed Aug.

Patented Zit,

inter PAUL S KNETTEL, ST. L'IS, MESSUR.

Application ed August i, i921.

lo State of li/iissouri, lieve invented a new and useful improvement in Apparatus for Prodnci'ng, Sepdrziting, and Feeding Powdered CosLvoiEwnicii tlie Jfoilovving is o specicotion..

This invention relates principally to apparntns for producing, separating and Jfeedin@ powdered cosi wherein the powdered '25 cosi is produced in a rotary grinder and is removed tiieretroin and fed to the furnace oy nieens of oir currents.

@ne oi the principal objects of the present invention is to provide e simple and efficient nienns 'loi' regnieting the air currents, whereby e inei of the desired tineness and qnenmj/ may oloteined. @ther objects are to increase tire output of powdered cosi,

eliminate tire use oi" dust collectors heretoi'- re coinnioniy used, to simplify the construction nnd to reduce the cost of mannectnre id operation. 'i-lie invention con! siste in construction, arrangement and f J ons of parts hereinafter described reed.

eccoinpenying drawing, which -t oi' this specification, and Wheresymlools reifer to like parts Wherever they occur,

s a-verticnl section through ein l etes ein'oodyiifonr invention; end

. is e perspective View of the siintterv'or regni ""ng the oir current.

ing to accompanying dren-fing, eretus comprises n rotnry grinder "te forni ot ring pniverizer teioiy supp i spiced spiders treft/ed thereon. "Elie rel o i3 extending nrrns ot the spiders 5 are connected tr .f outer ends by o series of sdieily spaced psrsiiel rods n. Looseiv sorted on rods 6 are grinding rings cooperete with the conceive grindoce of casing to pnlverize tire portieri orn trie iront. Weit ot e nisterioi niet opening 3t i having iongitndinslly' 8 which communicates with the lower end ot the feed chute of a. hopper 9; and said chute is providedwitli s gate 10 for cutting oil the How of the materiel to the grinder. 1f desired :in automatic ieed hopper ot the kind shown in lnittel Patent No. 1,318,389 dated ctober 141, 1919, may be substituted for the hopper shown.

The top Wall of the casing is provided with an outlet opening 11 which communicotes with the lower end of e vertically disposed pipe 12. Arranged between the me.- teriol inlet opening 8 and the outlet opening 11 is on apron or deiiector in the form of en inclined plete 13, Whose lower `front edge is hinged to the front Weil of the casing 3 adjacent to the upper edge of said inlet opening. The iront edge of the apron 13 ter-A minetes adjacent to the curved rear Weil of the casing 3. The front edge of the apron is adapted to cooperate with the inner sur- :tace of the curved portion of the rear Well of the casing to cut off communication between the pipe 12 and the `grinding ares of the casing 3 or to form an opening thereA between of varying Width, the width of said opening depending on the angular position of the apron, which swings in en arc Whose radius is iess than the radins ot the curved portion of the casing. The apron is edj usted by means oi e sector 14C which llas one end xed to seid apron. The ree end ot the sector extends through e, slot in the rear Wadi ot the casing 3 and is provided with s series oi holes adopted to receive s, pin whereiiy the apron may be supported in the desired adjusted position. The apron 13 is provided, adjacent to its lower hinged endl, with en opening 15, the purpose of vvliiclx will hereinafter appear.

'lilie upper end ot' the pipe 12, which leeds from the top of the easing 3, opens into the lower end oi en expansion or separating1 chamber in the *forni ot e, casing 16 of larger te@ ores than the pipe 12.' The upper end of the expansion chamber coinnlnnicotes with the lower end of e pipe 17 whose upper end opens into n ton-bionerl, ond seid ten, in turn, is provided with n pipe 1S, which leeds to the `urnece (not shown).

Within the uppermost pipe 1'? is iocsted s control valve comprising counterpart beltsinitters in the form of hollow tapering helicones 20 W'nose lower ends are snbssnntieily sernicircular and ere hinged together and Whose ripper ends terminate in o point. The

curved half sections 20 are pivotally 'supported in the pipe by the pivots 21, which hingedly secure said sections together, and are provided with sector arms 22 similar to the sector arni 1l of the apron 13, whereby said halves may be separated or broughttogether to control the iow of air and inaterial through the passageway'in the pipe 17. The fan is provided with a suitable air valve 22, whereby air may be supplied to the fan to reduce the suction created thereby in the passageway 23 formed by the pipe 12. expansion chamberl and pipe 17.

The expansion chamber 16 is preferably provided with a hinged apron or deiector plate 24 having an actuating sector This apron is hinged to the front wall ot' the chamber, which is provided with an inclined sacking spout 25a. rl`he lower end of said spout is closed by means ot' a cap An auxiliary hopper 27 has an inclined spout which opens into the expansion chamber through 'the rear walll thereof at a point opposite to the apron 24, This auxiliary hopper is adapted to receive powdered coal delivered thereto in sacks troni the sacking spout. 25 and is provided with 'a icate for 'cutting oil the flow of the powdered coal to the expansion chamber.

The operation of the apparatus is as tollows: Lump coal is fed by the hopper 9 to the rotary grinder where it is engaged b v the rotating rings 'i' and is pulverized. During the grinding operation the greater part of the pulverized coal is thrown upward by the circular motion ot' the rings against the inclined apron or detiector 13'. which causes the particles to dropback into the path the rotating' rinus t3, rll`he larger particles that pass through the opening between the apron and the casing; :tall baclr upon unper surface ot the downwardly inciined plate 13 and drop through the opening l? near thev hinged end ot the' apron intoI the path oi" rotating' rings. The suction created by thertan 18 in the passageway 2S euses finer particles of coal to be drawn through the opening' between the free ed ot apron 1% and the curved portion ot thefcasingf 3 and thence through the lowermostpipe 12 into the expansion chamber 16. This expansion chamber., by reason larger area.l has the effect ot decreasing the velocity oiC the air currents produced by 'the suction of the tan 18, thereby causngg the heavier particles to 'leali' back the grinder. The 'tine particles then drawn upwardly through the shutter-valve 2G into the fan 18 are delivered thereby the pipe to 'the furnace. The vaive 20 senves as a battle and can be adjusted to peru mit only the finest particles to enter the Lian., This valve also controls the amount ot `Fine dust permitted to enter saidV The size and quantity of pulverized material permitted to enter the expansion chamber 16 is regulated by adjusting the hinged apron or baille plate 13.

During the operation ot' the apparatus, the apron 24 within the expansion chamber may be lowered to nearly close said chamber, thereby formingr a pocket in which the fine coal dust will be collected. This dust is lthen drawn otf through the spout 25 into sacks and deposited in the auxiliary feed-hopper 7' 2T. With this arrangement, in the event ot' an accident to the pulverizer. the gate 28 in the spout of the auxiliary vfeed-hopper 2T can be opened. and the reserve material therein used without interfering with the operation of the apparatus.

Obviously, the invention admits of considerable modification without departing from the invention: thereiore` we do not wish to be restricted to the'particular forms and arrangements shown in the drawing.

W'hat we claim is:

1. A n apparatus of the kind described comprlsing a grinding device having an inlet opening and an outlet opening:` a feed hopper communicating with said inlet opening. a passageway' leadingI Jfrom said outlet openiiigi and suction means for creating an an" current in said passageway, and a control valve located in said passageway said valve comprising la plurality of curved lf-sliaped plates Whose base portions hinged together5 whereby said plates are ada. ted to be separated and brought to(` .her to control the tio'iv'ot' air and through said la@ passageway.

2. in apparatus of comprising; a pulverisi o.

Utl

passage d rising device an openingn width, saidA ningecl f" rein adiacent the-recit for returning tle ci the grinding area UL 3. an apparatus oi lincl comprising a pulverisingj device inlet pening and an outlet op hopper7 'communicating 'with said i.

oeserined having A ing, a passageway leading from said outlet opening, suction means for creatinglan air current in said' passageway, whereby the pulverized material is withdrawn from said pulverizing device through the passageway, said passageway having an enlarged portion between said outlet and said suction means. whereby the line material upon reaching the enlarged portion of said passageway is separated from the coarse material which drops back into said pulveriziug device. and adjustable means located in said passageway between said charnber and said suction device constituting a regulator for the'air current, a deflector for the heavier material and a cut-off for the passageway` said adjustable means comprising a pair ot' curved V-shapcd plateswhose base portions are hinged together and are pivotally supported within said passageway.

4. An apparatus of the kind described comprising a grinding device, having an inlet opening and an outlet opening, a feedhopper communicating with said inlet opening, ati-passageway leading from said outlet opening, .suction means for creating an Vair Current in said passageway, whereby the pulverized material is withdrawn from said grinding, device through the passageway, said passageway having an enlarged portion between said outlet and said suction means, whereby the fine material upon reaching the enlarged portion of said passageway is separated from the coarse material which drops back into said pulverizing device, an auX- iliary feed-hopper communicating with the enlarged portion of said passageway, a sacking spout leading from said enlarged portion` and a hinged deflector located in said enlarged portion adjacent to said sacking spout, said deector being adapted to form a pocket in which the pulverized material is collected, whereby said material is adapted to be drawn off through said spout and deposited in said auxiliary feed-hopper and constitutes a reserve supply of pulverized material.

Signed at St. Louis, Missouri, this 29th day of July, 1921.-

ERNST H. ELZEMEYER. PAUL KNliTTEL.