US1278288A

US1278288A - Rotary drier.

Info

Publication number: US1278288A
Application number: US19971517A
Authority: US
Inventors: William Otto Arzinger
Original assignee: Individual
Current assignee: Individual
Priority date: 1917-11-01
Filing date: 1917-11-01
Publication date: 1918-09-10
Anticipated expiration: 1935-09-10

Description

w. o. AIIZINGER."

ROTARY DRIER.

APPLICATION FILED Nov. I. 1917.

Patented Sept. 10, 1918.

:runnin-in wnmmm or'roanznvenn, or NASHVILLE, TENNESSEE.

To ail 'whom t may concern.'

Be it known that l, WILLIAM 0. Ammonia, a citizen of the United States, and a resident o Nashville, in the county of Davidson and State of Tennessee, have invented a new and useful improvement in Rotary Driers, of`

which the following is a specication.- n

My invention relates to proveniente in rotary driers, more especially those iers which are of the electric type, and it consists in the combinations, constructions and arrangements herein described and claimed, An object of my invention is'to rovide a rotary drier which is intended primarily ior use with gra hite rening machinery, f

one which willqta e the graphite which has been separated by a dotation process, and quickly and thoroughly dry, the graphite.

A further object of `my invention is to;

provide a device which will not only dry the graphite, but which-will cause it to .split apart or disintegrate, so that any foreign matter contained in the body oi the graphite will either beconsumed or will be brought into such condition that it may be easily extractedsnbsequently, 4

A .further obiiect ci my invention is to provide a rotary drier in which the regress of the material from one end to t e other of the drier, is assisted by means of the particular form and position of the heating elements;

: A further object of iny inventiongis to 'orovide a drier having heating units which rnay be easily placed in position or removed.,

i further object invention is to provide a drier having electric heating units "chicA will ,D he graphite to a high tern peratnre in c niclr time, thus causing it to disintegrate and be thoroughly dried.

@ther objects and advantages will apnear in the ollowing specidcation, and the novel features of the device-will be partienlarly pointed ont in the appended claims.

My invention is illustrated in the accorcpanying drawings :forming a part of this application, in which: v

Figure l is a central sectional view through the drier. y

iiig. 2 is asection along the line 9,-2 of Fig, l.

31 is a section along the line 8,-3 i :t1

ligg;9 d isdetail view of a portion of the drier and one oi the heating elements.

5- is a sectional view ci a portion ci.

v omen.

Specification of Letters Patent. Patented Sept. 3 0, 1918, Application led Novemberi, 1917. I Serial No. 199,715.

-2 of a heatresisting material such as asbestos, and an inner member 3 disposed contignons to said heat resisting lining.

The cylinder thus formed is provided with heads d and 5, respectively, the head d being dat on its inner side and being braced BX- ternally by means oit' braces 6. |The head 5 is slightly dished at its inner side as shown at Both of these heads have flanges 8 which extend over the end of the cylinder.

which is jonrnaled in a bearing 10 carried The head t is provided witha threaded hub 'da arranged to engage a threaded sleeve El` by an upright il. Extending through the sleeve 9 is a `feed pipe l2., i

At the opposite, end ci the cylinder, the head 5 is'tlireaded to a sleeve 13 journaled in bearings camied by a frame '15. The latter terms a housing for a worin' wheel i6 which is driven by a worm 17 on the shaft of a motor lill. v v

.dt one end off the cylinder is 4a-series ot inwardly extending units lilre that shown in Fig, d, a description of one et these units will snice, ince they are all alike. Each unit consists ci a coil made by bending a strip ci metal bach and forth. illhis strip ot nietal is shown at i8, @ne end ci the stri@ .is'connected with the binding vpost i9 snitablf insulated from .the casing, and the' other end is held hy a bolt 20 which is also inselated.c The various nnits are connected no in series, as shown in Fig. S, clear around the cylinder and at the end ci the units on one side ci the enit shown in d and ad-I jacent thereto, there is another binding post not sliown, similar to the binding post i9, these two binding posts being;` the means by which the current is supplied the series ci nesting elenfientsa The bolt 20 need not be a binding post, bnt if it should loe desirable to up the heating units into one or esll lilo

ric i series or in parallel, as desired. The units are separated by a partition 24: which is se- =cured to the cylinder by means of lugs 21,

spaces 23 being' provided at the outer edges 'f of the partitionV for the passage of the heated mixture. A similar partition 24 divides the spect to the axis of the cylinder, this angle coincidingFwith the angle ofthe same, as shown in ig. 1.

From the foregoing description of the various parts of the device, the operation thereof may be readily understood. -The 'i drieris rotated by means of the motor M, as

shown).

stated. Current is supplied to the heating units 18 from any suitable source (not These units are highly heated. The graphite is forced through the inlet ipe 12 in a plastic state, that is to say, the sakes of graphite which have been freed from their associated gangue by a 'flotation process which forms the subject of ak copending application, have had the water removed partly but not entirely. The flakes, therefore, are wet and cohere into a plastic mass which continually drops into the rotary drier. This plastic mass coming in contact with the highly heated resistance elements 18, is not only dried, but the graphite is disintegrated to a certain extent, and .certain foreign matter contained in the graphite is consumed by the high heat. Other vforeign matter either burns to an ashor .drops out of the graphite, due to the a tation and to the disintegration of the fla es. The inaterial is propelled forward, as stated, by the angularly disposed units and vanes 25. In this it is assisted by a suction fan (not shown) which is connected to the sleeve 13 at the exit end of the rotary drier. The fan, however, forms no part of the resent invention, having been fullyv set orth in a copending application.

I desire to call particular attention to the l fact that there is a sudden heating of the graphite. This causes the moist graphite to disintegrate, where a lslow heat would not. It also'thoroughly dries the graphite so that the latter easily passes around the partitions 21 and'24. All the graphite which has not been thoroughly dried` or disintegrated by the first group of heating units is practically so by the second group, and then the graphite passes the partitions and is taken up by the vanes 25v and forced toward the end of the cylinder where it is drawn out by the suction created by the fan (not shown),

aereas@ Due to the fact o f the provision of the heat resisting lining, only a very small portion of the heat escapes, the greater part of the heat being used in breaking up and drying thegraphite.

I claim:

1. A rotary drier comprising a cylindrical casing, means for insulating the walls of the casing to prevent the escape of heat, means for deliverin material to be heated at one end of the casing, a series of electrical heating units at the inlet end of the casing, a series of vanes at the outlet end, said vanes being inclined angularly with respect to the longitudinal axis of the cylinder for propelling the material to be heated, forwardly.

2. A rotary drier comprising a cylindrical casing, means for insulating the walls of the casing to prevent the escape of heat, means for delivering material to be heated at one end of the casing, a series of electrical heating units at the inlet end of the casing, said series of electrical heating units projecting inwardly from the walls of the cylinder and being arranged to propel the material to be heated, forwardly.

3. A rotary drier comprising a cylindrical f casing having heat insulating walls, means for rotating the casing, means for delivering material to be heated at one end of the casing, a series'of electrical heating units at the inlet end of the casing, said series of units -comprising coils projecting inwardly from the walls of the cylinders and being insulated therefrom, certain of said coils being connected u in series, and a series of inwardly exten ing vanes at the opposite end of the cylinder, said coils and said vanes being disposed at an angle to the longitudinal axis of the cylinder, whereby the material is propelled from one end of the cylinder to the other during the rotation thereof.

tudinal axis of the cylinders for propelling the material forwardly, and a partition disposed between said vanes and one of'said heating units, said partition having openings. at its edges for the passage of the material.

5. A rotary drier comprising a casing having heat insulated walls, an inlet at one end of the casing, an outlet at the other end of the casing, means for rotating the casing, a plurality of groups of electrical heating units at the inlet end ofthe casing, said groups being separated by a partition having openings at its outer edges, a plu- 5 rality of inwardly extending vanes at the opposite end of the cylinder, said vanes being arranged angularly with respect to the longitudinal axis of the cylinders for propelling the material forwardly, a partition .0 disposed bet-Ween said vanes and one of said heating units, said partition having openings at its edges for the passage of the material, each of the series of heating units being composed of an individual coil extending into the cylinder from the Walls thereof and being insulated from the Walls, each of said units bein inclined with respect to the llongitudinal axis of the cylinder.

WILLIAM OTTO ARZINGER.