US924376A - Centrifugal separator. - Google Patents

Description

J. W.'PHILLIPS. GENTRIFUGAL SEPARATOR; APPLICATION FILED Ail G 11', 1908. 924,376. Patented June 8, 1909.

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Applicationfiled August 11, ieos. Serial at, 4 2 7 To ail who-"m may concern:

' Be it-known'that I, JOHN WARN]; PHIL:

LIPS, citizen; of theUnited States, residingat Silver City,- in thevcount-y of, Lyon and-- 'State of Nevada, have invented new and useful Improvements'in Centrifugal Sepm tion.

y 10 of-thi'stype which is designed for mining, I and metallurgical purposes, breweries, sugar and oil refineries, and'any uses where it is' desiredtoseparate solids from liquids. 'lhe object of the, present inventionistof providea 'zentrifugal separator which shall be of simplebonstruction, easy to operate, ,ofma ximfum capacity, practical, and durapeculiar desig1i-'and"mode of operation wlzie'reby every bi es the material under:' I going concentration or separation must pass outward first into through .a 'zoneof maximum" centrifuging force, the liquids charge separate from the solids.

- .A'n'other object is'to provide a means; for

rapidly bringing the material to the same interfere "with separation.

The invention "at sists [of the v the construction and combination of parts as hereinafter more fully described; and claimed, having referencefto. the i ing drawings, in which-ea Figure ,1 is a 'central vertical-section u centrifugal se arator, Fig; 2 IS ZLSGQtIOHQIr' line In. the embodiment construct-a 'shellfma'de in two parts or sec;

tionsA and 2. Each section is in the form,-

of atruncated-fcone/With:the, bases-jot the both to'p and bottom, and the area; proximate hereinafter. This shell is supported upon I vertical shaft 4, which latter is supportedin] suitable bearings 56 in" the main frame B' ble; and; especially to provide'a'machine of i 20 i being strained backward again through the; zone of'aggreat'est energy to apoint" of: dis-* speed of revolution as the'pan, and accompany-fj two conicaljseetioii'ssuitably secureditogetheif -a at The' shell so'cOnStructedis open -at Patented June 8,1909.

v the'fapparatumi collar being keyed to the shaft land carrying an inclined :disk 8 serves to support theshell, upon said shaft. ;2[he' disk. 8 does ,not extend to. the shell,

the way around, through which every. bit

of the material to be-separated'pa'sses. The

disk 8 constitii'tes: the floor of the receiving 1 invention relates to centrifugal separators, and pertains especially to a separator hopper, and should not be perforated'u 'All 'constitutes- ;t -he receiving hopper 10.-- The upper surfaceofixdisk 8 carries-a number of straighter. curved; 'Thejfunction of these solids; and liquids,-'heavy and light, through the space around, disk 8" into the greatest diameter of the machine; thereby forcing pump, pumping the aflluent-materialthrough the stationary wall of'water and solids in suspension which is formed at 1) above and the line 1D being coincident with the mouth of the liquid outlet. pipes 13'.and parallel to the. 1Xl S .-2tn(l extending both above and 4 instead ofbeii-ig 'drawn upagainst this Wall 1) ofliqiridiand. material and allowed to flow up alongj' 'it and out-of the machine, "must by the forcing action of these webs or vanes-I1 1, and because of the construction of D, and all material subjected tothe, greatest separating action of the machine. No ma :terial can get out of the .machine'withoutit ip'assesaround the outer'cdge'of"this diskS' ofmy nvention,

which. constitutes the bottom of 'the hopper *space-l-OJI I On the lower'surface of disk 8'is 'aconical inverted trust'um C, the lower edge of which is on -thewater-line D; infact, locates the water-line. vTheafflu'ei'i't.liquids strained in -ward from the greater diameter of; the shell spill over Ltheilower edge of the conical ring through the' pipes 13 which tap the space behindthe ring 0. All the'liquld before it can be discharged. from the machine, must ass first through the area of greatest separating force in the machine, and then it below disk 8,: when the machine'is running;

and collect under'disk ,8, to be discharged 'therebeinga "spacel2 left between them all I thatpart off'the-machin'e above the disk 8 e5 radialiwebs or' vanesll which may beeither i vanes 11 'is 'to'force 'allthe material, bot h below the. plate, '8; l .The affluentmaterial,

the machine, be. driven through "this barrier must strain back to the outlets 13 against centrifu al force. In doing so the liquids are therdby separated from the solids, which latter are thrown against the casing 2 and removed by the scrapers 1st. To increase this action on the liquids on their inward return, counter to the centrifuging force, a

number ofplates areplaced on the under side of disk 8, in the outer angle between the outside edge of d1sk 8 and ring C, but not so as to interfere with the scrapers 1+L which work between the plates c and the whirling action of the liquid and bring it rapidly to and maintain it at the same speed as the casing. Since the shell, the hopper 10, the disk 8, vanes 11 and c and ring 0, revolve in unison, the material takes up the speed of the machine almost immediately without splash or commotion, -and consequently a separation begins more rapidly and continues more satisfactorily and efficiently than Where the liquid and material is free to slip around inside the 'machine.

The outward and downward flare of the up per section A causes the material to travel down to the line of union with the section 2, and through the annular space 12 between the outer rim of the disk 8 and the adjacent meeting edges of the sections A and 2. The tubes 13 discharge at the top into the annular stationary trough 1 1. The solids are made to travel downward to'the point of discharge at the lower end of the apparatus by the conjoint action of the spiral blades or scrapers 141- with the inside of the section 2.

fiThese spiralv blades 14: are fixed'to the i radially disposed webs 15, which latterare carried by a hub 15- secured to thesle'eve or hollow shaft 16 rotatable upon suitable bearings 1718 about the shell shaft 1; the

' shaft 4. and the sleeve or hollow shaft 16 having motion in the same direction, but at different rates of speed.

' To the top of the supporting webs 15 is fixed a ring 19, suitably spaced from the disk 8 above. The disk 8 and ring 19 inclose a space opening outward to the shell for the reception of the separated liquid, which is drawn off through the pipe or pipes 13 carried by the shell. The ring. 19 prevents the liquid which passes below it from rushing upward and out through the discharge pipes 18; this water beneath the ring usually being muddy, owing to the agitation caused by thevblades 14 in scraping the solids through the water-line D.

Ring 19 operates, however, to separate this eeesve died or partially separated liquid again into an area of greater centrifugal action around the shell.

The bearings 17-16 for the hollow Slnt'lill 16, are lubricated 11'0111 the top of the main shaft through the Oll passage 20.

1 Below'the shell and hub 15 is an annular catch-pan 21 into'which the solids are dethe solids collected in the pan are delivered by thescrapers 23 at the lower ends of the radial scraper conveyors 1 1. Just above the opening 22 is a radial deflecting lip 25, to

insure the downward discharge of the solids into any suitable receptacle beneath. discharge for the solids at the lower end takes place nearer the axis of the machine than the water-line D or discharge pipes 13. If this were not the case-the liquid would come out with the solids and the discharge for the solids would locate the waterline instead of the pipes 13. The spiral scrapers or blades in scraping the solids downward to the outlet, work the solids along a space inside the water-line; the solids being dried by centrifugal force before discharge; the water or liquid passing back up into the machine being another cause for making the liquid muddy below the ring 19.

By making the discharge for the solids nearer the axis of the machine, it. is impossiblefor the liquid to be discharged with them, unless the machine is overfcd, and pipes 13 not large enough to carry the liquid fed. Ialso gain, as above slated, the ad vantage of drying the solids after they are separated from the liquid by centrifugal action before they are expelled from the machine. v

The space between the disk 8 and ring. 15) forms a protected space or chamber for the separated liquid proximate to the greatest diameter of the shell. Consequently, all the liquid reaching this space must pass through areas of greatest centrifugal energy, and the liquid which passes out through. the pipes 13 is practically clear liquid.

Both shaft 1 and shaft 16 are driven from a shaft 26 by respective gearing connections 27 28; the shaft 26 being given constant motion through appropriate connection with any suitable source of power. The pitch of the respective gears 272S varies more or less, according to the difference in speed at which it is desired to drive the shell and the conveyer blades 14; as manifestly it is necessary that the conveyors operate at a slightl greater or slightly slower speed than the shell, in order to secure the downward movement of the solids in the shell.

In practice, the operation of the device is as follows: The shell and blades are made The I shell A are drawn into the angle formed by substantially in line with the discharge pipes 13, and whicheibase' line is theafo'resaid water-line D. "The-llrsolids are? scraped directly out of the machine and discharged and the forcing or pumping afforded by the -.solids from the liquids at opposite ends of of the spiral blades 14, which latter extend a little aboye the angle, and scrape down the they are discharged from the machine through the. outlet 22by the scrapers 23. l When themachine is in operation, the in-- I feed of the material. is'so regulated that the waist portion of the jshell by centrifugal of the shell, and the corresponding differed- -tial motion given to the scrapers 14, together to revolveathigh rates of speed. The Illa: terial to be treated is allowed to flow in through the opening at the upper end of the hopper space 10, and is preventedfroni passing directly down through themachine by the disk& It ,i'sthere'upon thrown to the sides by centrifugal force, aided by the vanes 11, and thence passes-downwardalong the inclined surface ofthe upper section A until itmeets the oppositely inclined surface of the lower section 2. Passing through the annular space 12, the separated liquid collects in the space between the disk 8 and ring 19, thence to be discharged'through the pipes 13 into the annular trough 14, which latter has an outlet 14'. In thepassing of the liquid into the space between the ring 19 and disk 8, it is made to worlr its wa through portions of the'greatest energy, so that it becomes freed of the solid matter in reaching the outlet to the tubes 13-. All the solids that collect on the inside of the upper the meeting slopes of the two sections, and this angle is kept clean by the upper sections whole lower surface of the portion 2 of the shell. These spiral conveyers Henry the solids down intothe pan 21, from whence material andilitjuidwill fill an annular space which. is substantially triangular in section, with the inner vertical base of the triangle downwardly beneath and at "the opposite, end of the machine fromthe liquid, there being no transverse prjectionsoubottom to the apparatus.

-' By this" apparatus it is apparent'that there the'scrapers 14, pumping vanes 11, the material would bei'held in this expanded force alone." 'Howeven's" the rapid rotation with the infeed of freshmaterial at the top,

vanes 11,. cause the final separation of the the apparatus. No solids can pass outwith the water, since inorder to do so they would have to be drawn through the machine against centrifugal force. 1

Having thus described my invention, what I. claim and desire to secure by Letters Patent is i 1. In a centrifugal separator, the combination of a rotatable shell open at the ends and having an' enlarged circumferential portion between its ends, a shaft to which the shell is fixed, spirally arranged blades inside the shell, means for giving the shell and the blades a differential rotary niotion to discharge the solids at the'lower end of the apparatus, and an imperforate disk within the shell and fixed to the sliaft,'and having its outer edge proximate to the greatest diameter 'of the shell, saidv disk beingseparated from the shell to provide an opening for the passage of all the material fed in from above and through which opening all the material must pass, the space below said disk having a discharge for the liquids extending above the disk and exterior to the shell.

2. A centrifugal separator comprising a shell open at the ends and having an enlarged circumferential portion between its ends, a shaft to which the shell is fixed,

spirally arranged blades inside the shell, means for giving the blades and the shell a differential rotary motion, an imperforate disk rigid with the shaft and shell and I within the latter and having its outer edge. proximate to the greatest diameter-pf the shell and separated therefrom to provide an opening around which all the material fed into the apparatus above the diskzimu'st passand'the space below the disk having a, liquid discgliarge separate from the discharge of the soli s. l

. v v 3. A centrifugal separator comprising a shell open at the ends and having an enlarged circumferential portion between its ends,'a shaft to which the shell is fixed, spirally arranged blades inside the shell, 10 means for giving the blades and the shell a. differential rotarymotion, an imperforate disk rigid with the shaft and shell and within the latter and having its outer edge proximate to the greatest diameter of'the shell and separated therefrom to provide an opening around which all the material fed into the a paratus above the disk must pass, thespac'e -iielow the disk having a liquid discharge separate from the discharge of the 1 solids, and said disk provided witlrrotary vanes. t

- 4. A centrifugal separator comprising a shell open at the ends and having an enlarged circumferential portion between its ends, a shaft to which the shell is fixed, spirally arranged blades inside the shell, means for giving the blades and the shell a differential rotary motion, an imperforate disk "rigid with the shaft and shell and within the latter and having its outer edge shaft, and aconical ring behind the said 10 proximate to the greatest diameter of the vanes and inclosing said liquid discharge. shell and separated therefrom to provide an In testimony whereof I have hereunto set opening around which all the-material fed my hand in presence of two subscribing into the apparatus above the disk must pass, Witnesses. the space below the disk having a liquid dis- JOHN VVARNE PHILLIPS. charge separate from the discharge of the .Witnesses:

solids, said disk having radial vanes on its G. E. MACK,

under side between the scrapers and the FRANK P. LANGAN.

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