US3438571A - Centrifugal separator - Google Patents

Centrifugal separator Download PDF

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Publication number
US3438571A
US3438571A US530009A US3438571DA US3438571A US 3438571 A US3438571 A US 3438571A US 530009 A US530009 A US 530009A US 3438571D A US3438571D A US 3438571DA US 3438571 A US3438571 A US 3438571A
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US
United States
Prior art keywords
liquid
separating
rotor
distributor
porous body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US530009A
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English (en)
Inventor
Jakob Murkes
Carl-Goran Nilson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alfa Laval AB
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Alfa Laval AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alfa Laval AB filed Critical Alfa Laval AB
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Publication of US3438571A publication Critical patent/US3438571A/en
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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
    • B04B1/04—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with inserted separating walls
    • B04B1/08—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with inserted separating walls of conical shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/02—Continuous feeding or discharging; Control arrangements therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/06—Arrangement of distributors or collectors in centrifuges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B7/00—Elements of centrifuges
    • B04B7/08—Rotary bowls
    • B04B7/12—Inserts, e.g. armouring plates
    • B04B7/16—Sieves or filters

Definitions

  • a centrifugal rotor is provided with an inlet for a mixture of two liquids to be separated and has a separating chamber including an outer peripheral portion and a main separating space, the rotor defining a completely open feed passage from the inlet to the peripheral portion of the separating chamber.
  • the rotor also defines first and second flow paths leading from the outer portion of the open feed passage or from the peripheral portion of the separating chamber to respective outlets for the two separated liquids, these outlets being spaced radially inward from the aforesaid peripheral portion, the first flow path including the main space of the separating chamber.
  • a porous body is inserted in one of these flow paths, preferably the first, and is of either the type operable to coalesce droplets of one of the liquids passing therethrough or the type operable to block the passage of one of the liquids.
  • the open feed passage from the inlet allows any solids in the feed mixture to pass directly to the peripheral portion of the separating chamber and thus avoid clogging of the porous body.
  • the present invention relates to a centrifugal separator for the separation of two liquids from each other.
  • a porous body is inserted in the flow path to or through the separator, said porous body being of such a kind known per se that, upon passage of a liquid mixture through the body, droplets of one of the liquids will coalesce, or of such a kind known per se that only the continuous liquid phase passes through the body.
  • the latter case implies that the liquid droplets are separated from the continuous liquid phase.
  • the droplets can be caused to coalesce prior to their admittance to the separator or after they have been entrained in the rotation of the separator because, as known, large droplets are separated more rapidly from a liquid than small droplets. Accordingly, a coalescing, porous body may be inserted in the stationary inlet of the separator.
  • a liquid-separating, porous body may be provided which separates a part of one of the liquids so that it never flows into the separation chamber, while the rest of the liquid mixture passes through the body and flows into the separation chamber. It is also possible to use a combination of a coalescing and liquid-separating body, so that the liquid mixture first passes through the coalescing body and thereafter through the liquid-separating body, or conversely. In the former case, a space is preferably provided between both bodies, from which space the liquid which does not flow through the second porous body, considered in the direction of flow, is conveyed to a corresponding outlet.
  • the invention is also applicable to a separator with a set of discs which, as well as the distributor, is provided with distribution holes.
  • coalescing, porous bodies may be inserted in the distribution holes, these bodies being preferably in the form of tubes which extend axially through the holes; or a coalescing, porous body may be arranged axially, so that it obturates the distribution holes in the distributor.
  • a liquid separating, porous body so that it obturates the distribution holes or to arrange a combination of a coalescing and a liquid-separating body in the same manner.
  • FIG. 1 is a vertical sectional view of a centrifugal separator embodying the invention in one form
  • FIGS. 2 through 9 are vertical sectional views of parts of centrifugal separators embodying other forms of the invention.
  • reference numeral 1 designates the rotor of the separator and 2 the vertical spindle carrying the rotor.
  • Reference numeral 3 designates the hood of the rotor and 4 the lock ring which fastens the hood to the rotor.
  • the liquid mixture to be separated is fed in through a stationary pipe 5.
  • the rotor is provided with a distributor 6 with wings 7 and a set of discs 8 with a top disc 9.
  • the distributor and the disc set are provided with vertically aligned distribution holes 10. Heavy liquid is discharged through an overflow 11 and light-weight liquid through an overflow 12.
  • the feed pipe 5 is provided with a coalescing plug 13.
  • the latter may be made of felted glass fibers in which the pores cons'itute, for example, to of the volume of the plug.
  • a plug it is possible to use a tubular body with a closed bottom end, the walls of the tube being preferably corrugated in order to constitute a large through-flow area for the liquid mixture passing through it.
  • a coalescing body 14 of the same kind as that shown in FIG. 1 is located in the distributor 6 instead of the pipe 5.
  • the body 14 therefore differs from the body 13 only by its larger diameter.
  • FIG. 3 a number of coalescing bodies 15 of the same material as the body 13 according to FIG. 1.
  • the bodies 15 are inserted in the channels formed between the wings 7 and of which there may be eight in number, which lead from the center of the distributor 6 to its periphery, there being a body in each channel.
  • the bodies 15 cover the through-flow area in each channel so that the whole liquid mixture supplied to the separator must pass through the bodies.
  • FIG. 4 which shows the right-hand part of a partial section through a rotor, a tubular or ring-shaped porous body 16 is provided.
  • This body may be of a coalescing or liquid-separating type or a combination of both types. If the body is of the liquid-separating type, it may be constituted by a fine-mesh wire cloth (width of mesh, 5 to 70a, for instance), the wires of which are preferably fixed in relation to each other by sintering.
  • the distributor 6 is not provided with any distribution holes and therefore the liquid mixture is compelled to stream radially inwards from the space outside the body 16.
  • the liquid separating by the body 16, if the latter is of the liquid-separating type, is supposed to be the heavier one and therefore moves radially outwards.
  • FIG. 5 we have shown the right-hand part of a partial section through a rotor with tubes 17 of coalescing material inserted in the distribution holes of the disc set 8.
  • FIG. 6 which shows the right-hand part of a partial section through a rotor, coalescing and liquid-separating bodies 18 and 20 are arranged at the underside of the distributor 6, these bodies having the shape of conical discs.
  • the liquid mixture passes first through the coalescing body 18 and thereafter enters an interspace 19 between said body and the liquid-separating body 20.
  • the liquid which does not pass through the body 20, and which in this case is supposed to be the heavy liquid phase, moves outwards to the outer edge of the body 20 while the liquid which has passed through the body 20 moves upwards in the disc set through the distribution holes 10.
  • FIG. 7 which shows the right-hand part of a partial section through a rotor
  • a plate 21 of coalescing material is arranged at the underside of each distribution hole in the distributor 6.
  • a slot 22 is arranged between each plate 21 and the distribution hole, and a plate 23 of liquid-separating material is inserted in each distribution hole.
  • the liquid-separating body shown in FIG. 8 is a largesized tube 24 inserted close within the inner edges of the disc set 8.
  • the tube 24 separates small droplets of heavy liquid which move out into the separation chamber through the disc set 8 while the light-weight liquid passes through the tube 24 and reaches its outlet 12.
  • a similar tube of a still larger diameter at the outer edge of the top disc 9 which tube prevents droplets of light-weight liquid from being entrained by the heavy liquid passing to the outlet 11.
  • FIG. 9 A modification of the embodiment according to FIG. 8 is shown in FIG. 9.
  • the liquid-separating body has the shape of a ring 25 inserted in the neck of the top disc 9, that is, just ahead the overflow 12 for the light-weight liquid.
  • the ring 25 operates in the same way as the tube 24 in the embodiment according to FIG. 8.
  • a centrifugal separator for continuously separating two liquids from each other, the combination of a rotor having an inlet for said liquids and having a sepa rating chamber including an outer peripheral portion and a main separating space, the rotor also having two permanently open outlets for the respective separated liquids and spaced radially inward from said outer portion of the separating chamber, said rotor defining completely open feed passages from said inlet to said outer portion, said open feed passages having a radially outer portion opening into said outer portion of the separating chamber, the
  • first and second flow paths leading from at least one of said outer portions of the feed passages and separating chamber to the respective outlets, said first flow path including said main space of the separating chamber, and a porous body inserted in one of said how paths in position to permit free flow of solids from said inlet to said outer portion of the separating chamber.
  • the rotor includes a distributor partly defining said open fee-d passage, said porous body being a tubular member coaxial with the rotor axis and surrounding the periphery of the distributor.
  • the rotor includes a distributor partly defining said open feed passage, and a set of discs in said main space of the chamber, said distributor and disc set having distribution holes in which said porous body is located.
  • the rotor includes a distributor partly defining said open feed passage, and a set of discs in said main space of the chamber, said distributor and disc set having distribution holes in which said porous body is located, said body being a tube extending through said holes substantially parallel to the rotor axis and being of the type operable to coalesce droplets of one of said liquids passing from said holes to said chamber.
  • the rotor includes a distributor partly defining said open feed passage, and a set of discs in said main space of the chamber, said distributor and disc set having distribution holes, said porous body covering a distribution hole in the distributor.
  • said first flow path includes an annular space located radially inwardly from said main space of the separating chamber, said porous body being a tubular member inserted in said annular space.
  • said porous body is of the type operable to coalesce droplets of one of said liquids passing therethrough, the combination comprising also a second porous body of the type operable to block the passage of one of said liquids therethrough, said second body being inserted in said one flow path downstream from the first porous body and defining therewith a passage leading to said peripheral portion of the separating chamber.

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  • Centrifugal Separators (AREA)
US530009A 1965-03-08 1966-02-25 Centrifugal separator Expired - Lifetime US3438571A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE297665 1965-03-08

Publications (1)

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US3438571A true US3438571A (en) 1969-04-15

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Application Number Title Priority Date Filing Date
US530009A Expired - Lifetime US3438571A (en) 1965-03-08 1966-02-25 Centrifugal separator

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US (1) US3438571A (de)
DE (1) DE1532672A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5052996A (en) * 1988-10-17 1991-10-01 Alfa-Laval Separation Ab Centrifugal separator
US20040029696A1 (en) * 2000-06-08 2004-02-12 Wilfried Mackel Centrifuge with sieve and method for operating said centrifuge
WO2006048299A1 (en) * 2004-11-08 2006-05-11 Eni S.P.A. Continuous porous bed centrifuge
WO2006107192A2 (en) * 2005-04-04 2006-10-12 Rowe Parsons International B.V. Device and method for separation of a fluid and more in particular an emulsion
US20090065424A1 (en) * 2006-02-23 2009-03-12 Jean-Denis Rochat Circular centrifugation chamber for separation of blood
WO2018134320A1 (de) * 2017-01-20 2018-07-26 Gea Mechanical Equipment Gmbh Zentrifuge

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB262902A (en) * 1925-11-07 1926-12-23 Frank Grimble Centrifugal separators for liquids
US1614357A (en) * 1926-02-19 1927-01-11 Gamper Robert Centrifugal separator
GB335466A (en) * 1928-12-10 1930-09-25 Ramesohl & Schmidt Ag Improvements in and relating to centrifuges
US2594445A (en) * 1946-10-23 1952-04-29 Sharples Corp Centrifugal machine and process
GB915879A (en) * 1960-04-20 1963-01-16 Braithwaite Equipment Ltd Filtering apparatus
FR1362722A (fr) * 1962-05-19 1964-06-05 Centrifugeuse à décanteur et à crible

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB262902A (en) * 1925-11-07 1926-12-23 Frank Grimble Centrifugal separators for liquids
US1614357A (en) * 1926-02-19 1927-01-11 Gamper Robert Centrifugal separator
GB335466A (en) * 1928-12-10 1930-09-25 Ramesohl & Schmidt Ag Improvements in and relating to centrifuges
US2594445A (en) * 1946-10-23 1952-04-29 Sharples Corp Centrifugal machine and process
GB915879A (en) * 1960-04-20 1963-01-16 Braithwaite Equipment Ltd Filtering apparatus
FR1362722A (fr) * 1962-05-19 1964-06-05 Centrifugeuse à décanteur et à crible

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5052996A (en) * 1988-10-17 1991-10-01 Alfa-Laval Separation Ab Centrifugal separator
US20040029696A1 (en) * 2000-06-08 2004-02-12 Wilfried Mackel Centrifuge with sieve and method for operating said centrifuge
US6869389B2 (en) * 2000-06-08 2005-03-22 Westfalia Separator Ag Centrifuge with sieve and method for operating said centrifuge
WO2006048299A1 (en) * 2004-11-08 2006-05-11 Eni S.P.A. Continuous porous bed centrifuge
EA010536B1 (ru) * 2004-11-08 2008-10-30 Эни С.П.А. Центрифуга непрерывного действия с пористым слоем
US20090139921A1 (en) * 2004-11-08 2009-06-04 Eni S.P.A. Continuous porous bed centrifuge
US7708681B2 (en) 2004-11-08 2010-05-04 Eni S.P.A. Continuous porous bed centrifuge
AU2005300696B2 (en) * 2004-11-08 2010-05-06 Eni S.P.A. Continuous porous bed centrifuge
WO2006107192A2 (en) * 2005-04-04 2006-10-12 Rowe Parsons International B.V. Device and method for separation of a fluid and more in particular an emulsion
WO2006107192A3 (en) * 2005-04-04 2006-11-23 Rowe Parsons Internat B V Device and method for separation of a fluid and more in particular an emulsion
US20090065424A1 (en) * 2006-02-23 2009-03-12 Jean-Denis Rochat Circular centrifugation chamber for separation of blood
WO2018134320A1 (de) * 2017-01-20 2018-07-26 Gea Mechanical Equipment Gmbh Zentrifuge

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Publication number Publication date
DE1532672A1 (de) 1970-03-12

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