US1846076A - Process and apparatus for separating liquids from solids - Google Patents

Process and apparatus for separating liquids from solids Download PDF

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Publication number
US1846076A
US1846076A US482414A US48241430A US1846076A US 1846076 A US1846076 A US 1846076A US 482414 A US482414 A US 482414A US 48241430 A US48241430 A US 48241430A US 1846076 A US1846076 A US 1846076A
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United States
Prior art keywords
liquid
openings
solids
bowl
separated
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Expired - Lifetime
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US482414A
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English (en)
Inventor
Andersson Gustav Harry
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De Laval Separator Co
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De Laval Separator Co
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • B04B1/10—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl
    • B04B1/12—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl with continuous discharge

Definitions

  • Fig. l is a vertical sectional View of the centrifugal bowl which .it is preferred to use in carrying out the process.
  • Figs. 2, 3, 4t and 5 are vertical sectional views, more or less diagrammatic, of different devices for regulating the inflow of flushing fluid relative to the outflow from the bowl of solids and liquid.
  • Fig. 6 is a vertical sectional view of a mod ified construction of centrifugal bowl.
  • the mixture to be separated which may be assumed to comprise two liquids of different specific gravities and solid matters (including sludges other than solids, of high specific gravities) is fed through the tube 1 into the central receiving chamber 2, whence it is conducted, through openings 3, into the separating chamber of the bowl.
  • the bowl may contain a liner of frusto-conical discs 4 con taining orifices aligning with opening 3, the entering mixture flowing up through the orifices in the conical discs and being thereby distributed through the spaces between the discs.
  • Thelighter liquid moves toward the center of the bowl and discharges through an opening in the upper end of theneck of the topdisc.
  • Theheavier liquid moves toward the periphery and outflows through a channel '6 between the topdisc and. the bowl wall and discharges through an opening at with the solid matters, of a very considera 1c proportion of the heavier separated liquid cannot be avoided.
  • the flushing liquid is introduced through a fixed tube 12 and channel 13 into the chamber 11.
  • the flushing liquid streams out with the solids through openings 14.
  • Hit is of primary importance to prevent Y flushing liquid from streaming through openings 10 into sludge space 8 and therein becoming mixed with the heavier separated liquid
  • the volume of inflow of flushing liquid through tube 12 is maintained somewhat below the volume of outflow of flushing liquid and solids through openings 14, which results in a slight flow of seperated liquid through openings 10 into chain erllj sufiicient to prevent 'nflow of flushing liquid through openings 0 into sludge space 8.
  • the volume of inflow of flushing liquid through tube 12 is maintained somewhat above the 1 volume of outflow of flushing liquid and solids through openings 14, which results in a slight flow of flushing liquid through openings 10 into sludgespace 8 suflicient to prevent outflow of the separated heavier liquid through openings 10 into chamber 11.
  • the separator bowl is changed, or if the size of the outflow openings is changed, as, for example, if their size be increased by wear, the direction of liquid flow through openings 10 may be the reverse of that desired.
  • the percentage of solids in the liquid mixture and the rate at which the solids flow into the chamber .11 may Vary, which may also result in an undesired reversal of flow and in an upsetting of the desired balance be tween inflow of flushing liquid to, and outflow of solids and liquid from, chamber 11.
  • An important object of the invention is to ma'intain such balance as may be desired between the inflow of flushing liquid to chamber 11 and the outflow therefrom of solids and liquids, including the maintenance, when desired, of substantial equality between such inflow and outflow so as to recover the solids substantially free of separated heavier liquid and recover the separated heavier liquid substantially free of flushing liquid.
  • Fig. 2 The liquid :streaming out throu h the openings 14 is collected and flows t rough a pipe line. 15 into a container 17 providedwith an outlet opening 16.
  • Container 17 is provided with a float 18 the movements of which are transmitted, through a lever 19, to a valve 21 in the supply pipe 20, which connects with tube 12.
  • a valve 21 in the supply pipe 20, which connects with tube 12.
  • the relation between the quantities of liquid per time unit flowing through the outflow tube 15 and the inflow tube 20 may be maintained constant, or a-predetermined excess of flow may be maintained through either pipe 15 or pipe 20.
  • a container 22, similar to container 17, is suspended from one end of a a lever 23 turnable, betweenits ends, on a pin 24. Suspended from the other end of said lever isanother similar container 25 whose bottom outlets connect with a pipe 26. u
  • the addition liquid is supplied to the container 25 through 'pipe 27 and discharges through pipe 26 and tube 12 into the centrifuge.
  • a valve 28 which is connected, by a link 29 and an arm 30, with the lever 23. If for any reason the quantity streaming out through the openings 14 in the wall of the centrifugal bowl increases, th level in the container 22 rises and the container 22 thereby becomes heavier and sinks.
  • the container acts on the valve 28 to more fully the container 32 wherein the level will vary with the rate of inflow of such liquid.
  • the float 33 in the container rises or falls, it raises or lowers respectively the movable part 34 of the supply pipe 35 for flushin liquid.
  • the flushing liqui streams out into a supply container 36, and a float 37 therein regulates the supply from the part 34 in such way that the level in the container follows the movements of the part 34 and thus also the variations of the level in the container 32.
  • the outstream through the opening 38 will thus depend on the outstream through the openings 14 in the centrifugal bowl.
  • the movable part V 2a 34 shall be connected with the other part 35 g of the supply pipe by means of a hose 40, as shown in Fig. 4.
  • Fig. 5 shows an Var'e arrangement by means of which the same result may be obtained.
  • the movable part of the supply pipe 41 comprises a tube '42 movably arranged in the supply pipe and cdlmected with the float 33 in the container 32 by means of an arm 43 and a rod 44.
  • the regulating devices are controlled by vari ions in the quantity of liquid in the cont iner in which the liquid: is collected when it streams out from the centrifugal bowl, but variations in the specific gravity of such liquid can be utilized to eiiect the desired regulation. If the specific gravity of the separated liquid is different fromthat 45 of the flushing liquid, the specific gravity of the liquid in the container is changed if a quantity of such heavier separated liquid enters the chamber 11 through the holes 10 and is mixed with the flushing liquid.
  • This change in the specific gravity of the liquid in thecontainer can be utilized'for rendering the regulating device operative.
  • centrifugal bowl herein described is intended for separation of solids from a mixture of liquids but vice according to the present invention can, of course, also be used in connection with centrifuges intended for the separation of solids from a homogeneous liquid.
  • the chamber 11 of the separator bowl is shown as provided with adjustable outlets 50 for the flushing liquid.
  • These outlets may be arranged as level outlets, the edges of which nearer the rotation center of the bowl being adjustable in a radial directhe regulating detion. If the outlets are moved toward the rotation center the pressure of the liquid at the openings 10 and 14 increases. If the outlets are moved outward the opposite efl'ect is roduced. It is desirable to avoid loss of quid by outflow through outlets 50, and to provide a stationary rin of liquid the inner level of which is limited y the outlets.
  • the liquid discharged -through outlets 14 is carried, as above described, through pipe 15 into the container 17 of Fig. 2; while any flushin liquid discharging through outlets 50 is fed to the same container through another pi e 51.
  • the li uid from out ets 14 and 15 may be collecte in a common receiving vessel and conveyed through a pipe (15 or 51) ,to container 17. The quantity of flushing liquid introduced into the bowl with this ar-:
  • rangement is determined not merely by the amount of liquid discharged through outlots 14, but, in addition thereto, by the amount ofliquid escaping through outlets 50.
  • outlets 50 may also be conveye to the container 22 of Fig.3, or'tothe containers 32 of Figs. 4 and 5; and any of the arrangements of Figs. 3, 4 or 5 will function in the manner hereinbefore described, with the additional advantage of minimizing loss of liquid.
  • What I claim is: 1. The process of separating liquids from solid matters which com rises subjecting'a mixture thereof to centrifugal force and effectin a substantial separation of the liquid from the solids and separately outflowin the .separated constituents, conveying a flus ing liquid to the locus of centrifugal force and discharging it with the separated solids, and regulating the rate of supply of flushing liquid in accordance with the rate of outflow ofthe flushing liquid and .solids from the locus of centrifugal force.
  • a centrifugal apparatus comprising a rotatable bowl having an inlet for a mixture to be separated, an outlet for separated liquid, and a sludge-receiving peripheral space having-inner openings communicating with the interior of the bowl and outer discharge openings, a conduit for supplying flushing liquid to said peripheral space, and means controlled by the rate of discharge through said peripheral space to regulate the rate'of inflow of flushing liquid into said peripheral space.
  • a centrifugal apparatus comprising a rotatable bowl having an inlet for a mixture to be separated, an outlet for separated liquid, and a peripheral sludge outlet, of a conduit for supplying flushing liquid to the vicinity of said sludge outlet, a tank adapted to receive the discharge fromthe sludge outlet and provided with an outlet, a float in the tank, a conduit for supplying flushing liquid to the vicinity of said sludge outlet, and means controlled by said float to control the flow of flushing liquid into the bowl.
  • a centrifugal apparatus comprising a rotatable bowl-having an inlet fora mixture to be separated, an outlet for separated liquid, and a sludge-receivingperipheral space having inner openings communicating with the interior of the bowl and outer discharge openings, a conduit for supplying flushing liquid to said peripheral space, a tank ada ted to receive the discharge from the slu ge outlet and provided with an outlet, a float in the tank, and means controlled by said float to control the flow of flushing liquid into said peripheral space.

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  • Centrifugal Separators (AREA)
US482414A 1930-03-05 1930-09-17 Process and apparatus for separating liquids from solids Expired - Lifetime US1846076A (en)

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SE1846076X 1930-03-05

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DE (1) DE600266C (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2500100A (en) * 1946-08-10 1950-03-07 Laval Separator Co De Centrifugal bowl
US2595376A (en) * 1948-05-14 1952-05-06 Separator Ab Device for stabilizing and homogenizing liquid mixtures
US2724549A (en) * 1951-04-09 1955-11-22 Clarence J Brown Centrifugal separator and method of operating the same
US2905643A (en) * 1954-06-14 1959-09-22 Thiele Kaolin Co Method of dewatering clay
US3014642A (en) * 1957-04-03 1961-12-26 Senarator Ab Centrifugal separator
US3111490A (en) * 1959-12-21 1963-11-19 Dorr Oliver Inc Centrifuge machine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2500100A (en) * 1946-08-10 1950-03-07 Laval Separator Co De Centrifugal bowl
US2595376A (en) * 1948-05-14 1952-05-06 Separator Ab Device for stabilizing and homogenizing liquid mixtures
US2724549A (en) * 1951-04-09 1955-11-22 Clarence J Brown Centrifugal separator and method of operating the same
US2905643A (en) * 1954-06-14 1959-09-22 Thiele Kaolin Co Method of dewatering clay
US3014642A (en) * 1957-04-03 1961-12-26 Senarator Ab Centrifugal separator
US3111490A (en) * 1959-12-21 1963-11-19 Dorr Oliver Inc Centrifuge machine

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Publication number Publication date
DE600266C (de) 1934-07-27

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