US930966A - Centrifugal apparatus for separating purposes. - Google Patents

Description

,E. JAHN. GENTRIFUGAL APPARATUS FOR SEPARATING PURPOSES.

APPLIOATION I'I LED MAY 18, 1909.

Patented Aug. 10, 1909.

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. paratus for separating purposes an hnusr JAHN, oe'nRNsWALnE, GERMANY.

CEHTBIFUGAL APPARATUS FOR SEPARATING PURPOSES.

To all who m 'it ma-y concern:

Bent known that; I, ERNST JAHN, civil engineer. a subject of the German Emperor, residing at- Arnswalde, in the Kingdom of Prussia, Germany, have invented certain new and useful Improvements in Centrifugal Apparatus for Separating Purposes; and I do hereby deelare'the following'to be a full. eleal'. and exact description of the intention, sueh'as will enable others skilled in the art to which itappertains to make and use. the saute. i

This invention relates to centrifu a'l 3p?- i l' more particularly to centrifugal apparatus for separating in'the order of their specific grarities solid particles suspendedin a liquid or less specific gravity.

gal apparatus havingya,,eonical drum receiving the suspendethiparticles at its nar-- row end. with a worm in the said drum for discharging said partieles when" separated; a suitable outletor outlets being providedl'or the liquid. v

.Ylhe present improvements Consist in the arrangement of said outlet air outlets for the susi'iendingliquid in the wideend of the drum. at a distanre from the drum 3X15 greater than the radius of the aperture prolt has been pro-' posed to employ for such purpose centrifuvided in the mrrow end of the drurn for' the entrance and exit of the separated par-- out. 'By the rapid rotation of the drum, the lighter particles of the mixture to be separated (which rotate with the drum in an inner. zone of the same) are thrown out throng-h the outlet an outlets in the Wide end of the drum while the heavier particles which are pressed hy centrifugal action against theIsjdt-s' ot' the dra n, are conveyed by means of the worm to the discharge opening at the narrow end of the drum. This o a-ning has a diameter such that the Fjlllftlt't oi the liquid which assiunes a paraholir .-hape. will not extend as far as the said opening.

The arron t'aurrin g drawing illustrates in central longitudinal section a (-onstruction of centrifugal separator having a vertical axis 'emhodying the improvementsin this invention. I v

7) represent a trust:i-co'nieal drum havingits upper end open. as shown at e. ventrally inountrd on the hollow shaft \\lllt'll is-revuli'ed by any suitable means (not shown. The hottoui of the drum is T he drum Specification of Letteris Patent. Application filed Kay 18, 1909. SerialNo. 496,776.

\ fiat, and in said bottom Patented Aug. 10, woe.

lets 0. These outlets are located at a greater distance from the axis of the drum than the length of the radius of the upper open end of the drum. g is a shaft passing centrally through the hollow shaft f and Genare provided outtrally through the drum, and this shaft g may also be revolved by any suitable means (not shown). To the shaftyg is attached a conical skeleton frame, having aworm or spiral conveyor 61 on its outside, which fits closely within the drum 1). v

a is a pipe for supplying the material under treatment to the drum.

Q'Ihe Wormv 65 may be either right-handed or left-handed, as'desired. There maybe a series of outlet openings 0.

The worm may rotate 1n the same direo t ionfas the drum, According as the worm is left handed or right-handed, its speed of rotation will be slightly greater or less than that of the drum. In any case, it engages the heavy particles that are thrown agamst the inner wall of the drum, and it conveys them gradually toward the narrow opening of the drum. By this means special bladesfor collecting the separated substances are dispensed with, whereby the wear and tear caused by such heavier suhsta-ucesis lessened and the machine runs easier.

The mode of operation of the centrifugal apparatus isas follows: It is assumed that the separator is rotatin and that the mixture to he separated, say for example, .water containing washed clay in suspension, is being charged into the drum through the pip'e a. This mixture of water and clay is at once thrown against the sides of the drum 7). Asia well known, tashed clay like most suhstanrcs for Which-"the apparatus designed. is composed of larger and smaller particles. particles are thrown off at once against the sides of the drum and are conveyed upward hy the worm. The smaller lighter particles of clay pass down with the Water, and are separated gradually-in their passage on a vertical axis,

The larger heavier-.1

down along the sides of the drutn, until they are engaged by the worm and conveyed lip-.

ward in their turn. Thus as heavier-partioles have only a short distance to travel in the drum, while the lighter particles travel almost to the bottom of the drum. whence they are carried up by the worm along the entire length of the drum to the top thereof.

' The rapiditywith' which the-particles are.

- and the Width the len separated and the speed of their travel to the top 01'" the drum dependon the manner in which the mixture is charged into the drum, because only the same" quantity of liquid can fiow out from theoutlet 0 as is charged in at the top through the ipe al During the centrifugal treatment, t e con stituent of the mixture which is situated nearest the axis of the separator, that is to say, the liquid; forms a parabolic surface the apex of which is situated either inside or outside the drum, acoordin to'the speed of rotation of the latter. ow, since the radius of the up r opening' in the drum is smaller than the ist anceof the outlet 0 from the axis of the drum, the-surface of the liquid will not extend as far as the discharge! spring 6 of the druni' -becau se assuming that scribed.

the amount of mixture discharged into the drum is not greater than the. apparatus is able to discharge, so'much liquid will always flow out through the outlet .6 that the upper I edgeof the liquid cannot reach the openg ing 6. The fact that'the. upper discharge opening in the drum has a smaller diameter than the circle struckfrom the drum axis as a center through the outlet 0, is therefore a feature of considerable importance. Owing i to this difilerence, there is produced in front 5 of the discharge opening e a dry zone -f through which the heavier particles will be conveyed out of the surface of the liquid by the worm; The amount of the said difierence will determine the Width of this zone, of this zone will determine h of time durin which the mate- 1 rialwil he raised out 0 the liquid by the certain extent. 4 This length of time may be varied for instance by lengthening or shortening the upper part "of the drum, or by varying the area-of the outlet or outlets c. i The operation is the same if the apparatus Worm and thereby practically dried to a has a horizontal axis of rotation.

' jnstiuent.

l The improved centrifugal apparatus is i capable of working continuously after ad- I l ciuim:-- 3 t. In a centrifugal apparatus the combil'he periphery of theof said frame at its lower end being nation of a hollow nation of a drivin shaftya vertically dis posed frusto-conica drum mountedon said riving shaft, said having'its upper end entirely open and its -lowergend closed, said closed lower end hein provided with a downwardly disposed disc r e ated fartherfrom the axis of t edrum than open end; a second shaft entering said drum centrally; uskeleton frame, of the same contour as said drum, carried by said second shaft; the periphery dis osed disbctween the wall of said drum an sai charge outlet and at a considerable distance beyond said discharge outlet; and means introducing the material to be treated into said skeleton frame; substantially as de- 2. In a centrifugal apparatus the combishaft; a. vertically arranged frusto-conicul drum centrally mounted on said shaft, said drum having its upper end entirely open and its lower end closed, downwardly disposed ingprovidcd in-said closed end; a second shaft passing through said hollow shaft; a skeleton frame secured to said second named shaft, having its longitudinal members parallel to the inner, surface of said drum and extending upwardly through the open end of said drum; a spiral conveyor mounted on the outside of said skeleton frame; and means for feeding the material to he treated into the upper open end. of the skeleton frame; said downwardly disposed discharge ERNST JAHN.

Witnesses:

A. C. BUSANNY, MARTHA DuANsrnLn.

outlet situdischarge outlets be-,

and at a disdrum further,

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