USRE14331E - Centrifugal separator - Google Patents

Description

'mms HARRY rlmxna, or

SAN FRANCISCO, CALIFORNIA.

CENTRIFUGAL snrana'ron.

Specification of Reissued Letters intent. Reissued J 1113* 24;, 1917.

Original No. 1,212,988, dated January 16, 1917, Serial No. 89.808, filed April 8, 1916. Application for reissue filed June 9, 1917.

To all whom it mag concern:

Be it known that. I, THOMAS HARRY PARKER, a citizen of the United States, residing at the city and county of San Fran cisco and State of California, have invented new and usefulImprovement-s in Centrifugal Separators, of which the following is a specification.

My inventionrelat'esto improvements in centrifugal separators; and has for its object to provide a continuous separating apparatus for the purpose of separating substances *ofydifi'erent specific Weights from solutions or mixtures.

One form which my invention may assume is exemplified in the following description and illustrated in the accompanying drawing, wherein I have shown the device em bodied in a dewatering device for metallurgical pulp.

.The figure is a central vertical section of mg apparatus.

n the drawing, 1 indicates a base or support for a bearing 2, inwhich can rotate a sleeve 3 carrying at its lower end a pulley 4, and said sleeve carries at its upper end by means of webs 5 a circular, concaved shell '6 rotatable with said sleeve 3. Within said 1 sleeve 3 is a shaft 7, rotatable within said sleeve-,and. whichshaft carries at its lower end apulley 8 and at its upper end a centrifugal distributer 9. The solution carrying fine particles of sand or sediment of any kind is fed from a pipe 10 to the center of said distributor 9, and as said distributor rotates it carries the sediment to its outer curved periphery 11, where the same will be held between such periphery and the surrounding eurvcd wall 12 of the shell 6.

lVhen the'space between walls 6 and 11- is filled up with sediment, as shownat 13, the water or valuable light particles will flow over the upper edge 14 of the shell 6 and into an upper cylinder or receptacle 15 supported on a cylindrical housing 18 and having an inclined bottom 15 surrounding the upper portion of the shell and a discharge pipe 16. The sediment will be forced out beneath the lower edge 17 of the shell 6 and be discharged within a lower cylin (lrical housing 18, from which it may be carried off by an suitable means. The said Serial. No. 173,893.

centripetal force, but the clear solution only is able to pass over the rim 14:. When the sediment in the upper part of the seini-' circular-passage becomes larger in volume than the sediment in the lower half thereof, there tends to be a movement of the entire '!mass in a downward direction, and this tmoveme'nt forces some of the sediment out of the lower end of said passage and thence into the lower chamber 18. The said movement continues at intervals while the apparatus is in operation. The discharge pipe 10 is supported centrally in the receptacle 15, as s own. The part of the apparatus shown centrally divided in the drawing corresponds to the other part thereof not shown, said apparatus being preferably circular in form. The upper portion of the distributer 15 provided with a central depression, as

shown in the drawing. Belts for the operation of the pulleys are shown thereon.

In operation, pulp or other material to be separated is fed to the distributor through the pipe-10 and the said distributor is rotated at a sufficiently high speed to cause the material to be discharged radially out- Ward against the concaved shell. The said shell is also rotated but at a slightly different speed. The first effect will be for the material to fill the concavity of the shell, and owing to the shape'of the latter a sufficient mass of heavy particles will be retained therein to fill the space between the shell and periphery of the distributor. Centrifugal force will move the heavier particles outwardly against the walls of the shell, while the lighter particles will remain toward the inside, and as the feed ofthe material continues the lighter particles will be forced upwardly over the rim 14 of the shell while the heavier particFs will pass out at the bottom of the shel'.

None of the light particles can escape below the distributor on account of the seal formed by the mass of heavy particles be tween the periphery of the disk and the shell, at the same time the heavy articles cannot escape above on account 0 the inwardly projecting rim 14. The pressure of the lighter particles against the heavier, aided gravity, will insure the discharge o5 f lm-heavy particles at the bottom of the s em The periphery 11 of the distributor is in the lorni of an arc and the shell is made arcuate also, being struck from the same center as the periphery 11. The effect is to produce a space between of uniform width throughout its length and rounded. Therefore there is no tendency for the heavy particles to clog and become packed as when the space is made varying in cross section or contains sharp angles. The clogging and packing ot the heavy particles in the space between the periphery of the distributor and the shell, particularly when handling sand and granular particles, as in metallurgical pulp, present a considerable problem. The shape and form of this space and the differential speeds of the distributer and shell otter a solution.

llaving thus described my invention, what I claim and desire to secure by Letters Patent is 1. in a centrifugal separator, a rotatable distriliuter having a central depression, a shaft carrying said distributor and driving the same, a shell projecting over and surrounding said distributer and provided with an upper open .end and a lower open end, a rotatable sleeve carrying said shell and journaleil upon said shaft, a receptacle havin; a downwardly inclined bottom surrounding the upper portion of said shell and yn ovided with a discharge aperture in its bottom, and a casing surrounding said shell and sleeve.

lo a centrifugal separator, a distributor having a central inclined depression, a shaft carrying said distributer and driving the same. a shell projecting over and surrounding said distributer having openings in its upper and lower ends, a. rotatable sleeve journaled upon said shaft and carrying the shell, a receptacle having a downwardly inclined bottom surrounding the upper por tion oi said shell and provided with a dis charge aperture in its bottom, said inclined bottom tern'iinating adfacent to andin line with the upper rim of the shell, a casing surrounding said shell and sleeve, and a supply pipe'extending downwardly through said receptacle and terminating in proximitv to the center of the distributor.

l'n a centrifugal, separator, a rotatable distrilniter carried on a vertical axis and discharging the material radially outward, and a rotatable concaved shell surrounding the distributor and receivingthe material therefrom, said shell having open-ended walls projecting above and below the distributor and capable in operation of discharging the light particles over the top edge and the heavy particles below it.

4. In a centrifugal separator, a rotatable distributer carried on a vertical axis and discharging the material radially outward, a rotatable concaved shell surrounding the distributer and receiving the n atcrial there- 'trom, said shell having oper led walls projecting above and below the distributor and capable in operation of discharging the light particles overthe top edge and. the heavy particles below it, and means for maintaining a seal of heavy particles between the distributor and shell, whereby the light particles are prevented from passing downwardly.

5. In a centrifugal separator, a rotatable distributer carried on a vertical axis and discharging the material radially outward, and a rotatable coneaved shell surrounding the distributer and receiving the material therefrom, said shell having open-ended walls projecting above and below the distributer and capable in operation of dis charging the light particles or the top and the heavy particles below t, said distribute/r having coneaved upper l 6. in a ccntrifug, l separator. a rotatable distrilniter carried on a vertical axis and discl'iarging the material radially outward. a rotatable concaved shell surrounding the distributer and receiving the material there'- from, said shell having opcn-ended walls projecting above and below the distributer and capable in operation of discharging the light particles over the top edge and the heavy particles below it, said dist ibuter having a concaved upper face. and means for supplying material to said distributer from a point above and adjacent to the center of the same.

Y. In a centrifugal. separator, a rotatable distributer carried on a vertical axis and discharging the material radially outward, and a rotatable eoncaved shell surrounding the distributor and receiving the material therefrom, said shell having openended walls projecting above and-below the distributer and capable in operation of discharging the light particles over the top edge and the heavy particles below it, said concaved shell having its upper portion extended inwardly farther than the lower portion.

8. In a centrifugal separator, a rotatable distributor carried on a vertical axis and discharging the material radially outward, a rotatable concaved shell surrounding the distributer and receiving the material therefrom, said shell having open-ended Walls projecting above and below the distributor and capable in operation of discharging the light particles over the top edge and the heavy particles below it, and areceptacle or'launder for the light material formed with a stationary inclined bottom surrounding the upper portion of the shell.

9. In a centrifugal separator, a rotatable light particles over the top edge and the heavy particles below it, said shell. and distributer being spaced from each other and disconnected, and separate driving means for the shell and distributer.

11. in a centrifugal separator, a rotatable distributer carried on a vertical axis and discharging the material radially ontward, a rotatable concaved shell surrounding-the distributor and receiving the material therefrom, said shell having open-ended walls projecting aboveand below the distributer and capable in operation of discharging the light particles over the top edge an the heavy particles below it, said shell and distributer being spacedfrom each other and disconnected, and means for driving the shell and distributer at slightly different speeds.

12. In a centrifugal separator, a rotatable distributor carried on a vertical axis and discharging the material radially outward, and a rotatable c'oncaved shell surrounding the distributer and receiving the material therefrom, said shell having open-ended walls projecting above and below the distributer and capable in operation of dis charging the light particles over the top edge ah dbthefheavy particles below it, said distributer having a downwardly curved periphery in the form of an arc and the p0rtion ot' the shell adjacent to said periphery being also made arcuate, the axes of curvature of both being coincident.

THOMAS HARRY PARKER.

\Vitnesses: I

JOHN H. HERRING, G M. BALL.

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