US2719668A - Centrifugal bowl - Google Patents

Centrifugal bowl Download PDF

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Publication number
US2719668A
US2719668A US375334A US37533453A US2719668A US 2719668 A US2719668 A US 2719668A US 375334 A US375334 A US 375334A US 37533453 A US37533453 A US 37533453A US 2719668 A US2719668 A US 2719668A
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US
United States
Prior art keywords
bowl
separating chamber
chamber
sludge
channels
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
US375334A
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English (en)
Inventor
Bergner Nore Einar
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 Holdings Amsterdam AB
Original Assignee
Separator 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 Separator AB filed Critical Separator AB
Application granted granted Critical
Publication of US2719668A publication Critical patent/US2719668A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B04B1/02—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles without inserted separating walls
    • 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
    • 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

Definitions

  • This invention relates to centrifugal separators and more particularly to an improved centrifugal bowl for separating a feed into at least two constituents of different specific gravities.
  • the centrifugal bowl of the present invention has a separating chamber which preferably is of great length or axial extent as compared to its diameter.
  • the bowl is characterized by having feed channels'in'one end of the separating chamber for admitting the material to be separated, these feed channels opening into the separating chamber at its periphery and serving to impart rotary movement to the feed material, while in the other end of the separating chamber are substantially radial channels or flow spaces; and at least one discharge opening is arranged in the central part of the separating chamber.
  • the numeral 1 designates a centrifugal bowl mounted on a hollow drive shaft 1a which forms a feed channel fordelivering the material to be separated into .the separating chamber 2.
  • the flow of the 1 feed from channel 1b to chamber 2 is' by way of a number of feed channels 3 arranged more or less perpendicularly to the shaft of the centrifugal bowl .and opening into the separating chamber 2 at one endof .the bowl, the feed end.
  • the channels 3 may bei'formed by means including radial vanes 3a underlyinga central baffle disc 3b.
  • At the other end of the bowl, likewise in the separating chamber 2 are substantially radial channels 4.
  • the centrifugal bowl is provided with two concentrically arranged discharge devices or channels 5 and 6, and the discharge openings formed by these channels in the centrifugal bowl are located in-the central .part of the separating chamber.
  • Theseparating chamber is provided at its periphery with an enlargement forming a sludge space or chamber 7 for:collection of separated sludge; and in the wall of the centrifugal bowl are sludge outlets 8, such as nozzles or the like, which preferably are directed backwards with respect to the direction of rotation of the bowl.
  • the separated components may be collected in the usual manner in receiving chambers formed by the stationary covers 9, 10 and 11.'
  • the separating chamber 2 has a central vertical axis corresponding to the axis of rotation of the hollow drive shaft 1a of the bowl.
  • This chamber also has opposed, axially spaced ends formed by disc 3b and the top of the bowl, respectively.
  • the discharge openings 5a and 6a, as shown, are located at a shorter distance from the chamber end 3b at which the inlet channels 3 are located than from the other end at which the channels 4 are located.
  • the material to be separated is preferably fed to the rotating centrifugal bowl 1 under pressure, and the feed channel 1b in the shaft should therefore be directly connected to its stationary feed line by means of a sealing arrangement of conventional form (not shown).
  • a rotational movement is imparted to the feed material which then flows in an axial direction throughthe separating chamber substantially following its outer boundary surface.
  • the heavier particles in the material are thereby separated out and slide along this outer boundary surface to the sludge chamber ,7, from which they are then discharged through the nozzles 8.
  • the light component, and the heavier particles which are more difiicult to separate, continue in an axial direction to the other end of the bowl where.
  • the material being separated does not to any appreciable extent pass through-the separating chamber 2 directly from the mouths of the feed channels 3 to the mouths .of the discharge channels 5 and 6, but mainly follows the arrows indicated on the drawing. If the material should take the shortest way through the separating chamber, it would slide because there are no vanes, blades or the like in this part of the separating chamber. Such a sliding movement causes an extraordinarily high counter-pressure which increases rapidly according to the throughput rate.
  • the material does .not take the shortest waythrough .this chamber but instead passes axially, in the manner described :above, first in one direction along the outer boundary surface of the separating chamber .and then ;in the .opposite direction along the inner boundary surface of .the separating chamber.
  • Thematerial is thus subjected to an extremely effective separation, partly .due to its long path through the separating chamber .and partly because this path in general is situated in the .outer part of the separating chamber, which from the .point .of .view of separation is the most eflicient part.
  • the diameter of the separating chamber may be very small, whereby the centrifugal bowl may .be operated at a relatively high speed :of :rotation, which is -of importance because the smaller the diameter, the greater the acceleration will be for given stresses in the centrifugal bowl.
  • the channels 4 in the upper part of the separating chamber allow the material to move inward at :a low counter-pressure, since they act to prevent sliding of the material relative to the bowl.
  • the sludge particles vary considerably in size, the smallest particles (i. e., those which are most difiicult to separate) will be discharged through the outlet 5 together with the liquid component.
  • a lighter liquid By sliding from channel 5 to channel 6, however, a lighter liquid can also be separated off, the purified liquid thus discharging through channel 6 and the lighter sludge through channel 5. Since the sliding, as previously mentioned, causes a considerable counter-pressure, the amount which discharges through the inner channel 6 will be smaller than that discharging through the outer channel 5.
  • the centrifugal bowl here illustrated is to be regarded only as an example of the present invention and can therefore be modified.
  • the sludge outlets 8 (and possibly also the enlargement 7 serving as a sludge chamber) may be eliminated.
  • the sludge outlets 8 and the sludge chamber '7 may be located at a greater or smaller distance from the feed end of the centrifugal bowl than that shown on the drawing.
  • the substantially radial channels 4 at the other end of the centrifugal bowl may consist of the spaces between radially directed vanes, blades or the like, which are shown at 4a
  • the shaft 1a of the centrifugal bowl of the present invention need not be driven, since rotary motion in the separating chamber can be imparted to the material in the same manner as in a cyclone.
  • the necessary rotation of the feed material may be effected, without rotating the bowl 1, by simply arranging the feed channels 3 so that they open into chamber 2 substantially tangentially, as is Well-known and conventional in cyclones.
  • the separator may also be used for separation of two liquid components from one another, in that the lighter liquid component is discharged through outlet 6, and the other liquid component through outlet 5, whereas the sludge, as mentioned above, either is discharged through the nozzle openings 8 or is collected in the sludge chamber 7.
  • more than two liquid components may be taken out through a corresponding number of concentric discharge openings in the central portion of the separating chamber.
  • the nozzle openings at the periphery also may be used as outlets for the heaviest liquid component instead of being used as sludge outlets, provided that the material being separated contains no heavy sludge.
  • a centrifugal bowl forming a separating chamber having a central axis and opposed, axially-spaced ends
  • said means forming the inlet channel include generally radial vanes forming a plurality of inlet channels, the bowl also having externally thereof a central hollow shaft forming a feed channel leading directly to said inlet channels.
  • a centrifugal bowl according to claim 1 comprising also a central shaft mounting the bowl for rotation on said axis.
  • a centrifugal bowl according to claim 1 in which said discharge opening is located at a shorter distance from said first end of the chamber than from the other end thereof.
  • a centrifugal bowl according to claim '1 in which the separating chamber intermediate its ends is provided with an enlargement at its periphery forming a sludge space for collecting sludge separated from the feed material.
  • a centrifugal bowl according to claim 1 in which the separating chamber intermediate its ends is provided with an enlargement at its periphery forming a sludge space for collecting sludge separated from the feed material, said sludge space being located near said other end of the separating chamber.
  • a centrifugal bowl according to claim 1 in which the separating chamber is provided with sludge outlets in the peripheral wall of the bowl, said sludge outlets being located near said other end of the separating chamber.
  • a centrifugal bowl according to claim 1 in which a the separating chamber intermediate its ends is provided with an enlargement at its periphery forming a sludge space for collecting sludge separated from the feed material, said sludge space being located near said other end of the separating chamber, there being sludge outlets in the peripheral part of said sludge space.
  • a centrifugal bowl according to claim 1 comprising also a second discharge device in the bowl forming a second discharge opening in the central part of said chamber but at a dilferent radius than the first dis charge opening.

Landscapes

  • Centrifugal Separators (AREA)
US375334A 1952-09-04 1953-08-20 Centrifugal bowl Expired - Lifetime US2719668A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE749786X 1952-09-04

Publications (1)

Publication Number Publication Date
US2719668A true US2719668A (en) 1955-10-04

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ID=20323324

Family Applications (1)

Application Number Title Priority Date Filing Date
US375334A Expired - Lifetime US2719668A (en) 1952-09-04 1953-08-20 Centrifugal bowl

Country Status (4)

Country Link
US (1) US2719668A (en(2012))
DE (1) DE1040459B (en(2012))
GB (1) GB749786A (en(2012))
NL (2) NL181147B (en(2012))

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2928546A (en) * 1955-08-29 1960-03-15 Carroll E Church Mud separator
US3396844A (en) * 1964-05-20 1968-08-13 Ajem Lab Inc Vortical separator
US4936820A (en) * 1988-10-07 1990-06-26 Baxter International Inc. High volume centrifugal fluid processing system and method for cultured cell suspensions and the like
US5006103A (en) * 1977-08-12 1991-04-09 Baxter International Inc. Disposable container for a centrifuge
US5078671A (en) * 1988-10-07 1992-01-07 Baxter International Inc. Centrifugal fluid processing system and method
US5217427A (en) * 1977-08-12 1993-06-08 Baxter International Inc. Centrifuge assembly
US5217426A (en) * 1977-08-12 1993-06-08 Baxter International Inc. Combination disposable plastic blood receiving container and blood component centrifuge
US5387342A (en) * 1992-06-10 1995-02-07 Charles W. Taggart Centrifugal separator and method
US5571068A (en) * 1977-08-12 1996-11-05 Baxter International Inc. Centrifuge assembly
US6346069B1 (en) 1999-08-06 2002-02-12 Separation Process Technology, Inc. Centrifugal pressurized separators and methods of controlling same
US6607473B2 (en) 1999-08-06 2003-08-19 Econova Inc. Methods for centrifugally separating mixed components of a fluid stream under a pressure differential
US6719681B2 (en) 1999-08-06 2004-04-13 Econova, Inc. Methods for centrifugally separating mixed components of a fluid stream
WO2024257168A1 (ja) * 2023-06-12 2024-12-19 巴工業株式会社 竪型遠心分離装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1265664B (de) * 1962-11-02 1968-04-04 Kernforschung Mit Beschraenkte Geraet zum Trennen von einer Phase aus einem Gemisch von Fluessigkeiten

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE111848C (en(2012)) * 1899-06-03
US1870113A (en) * 1931-03-07 1932-08-02 William A Hawkins Separating machine
US2422882A (en) * 1942-11-04 1947-06-24 Bramley Arthur Separation of fluids by simultaneous centrifugation and selective diffusion

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE588809C (de) * 1927-07-25 1933-11-27 Nat Acme Co Rohrfoermige Schleudertrommel
US2488746A (en) * 1946-03-16 1949-11-22 Laval Separator Co De Centrifuge with centrifugally flushed filter
BE486877A (en(2012)) * 1948-01-22

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE111848C (en(2012)) * 1899-06-03
US1870113A (en) * 1931-03-07 1932-08-02 William A Hawkins Separating machine
US2422882A (en) * 1942-11-04 1947-06-24 Bramley Arthur Separation of fluids by simultaneous centrifugation and selective diffusion

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2928546A (en) * 1955-08-29 1960-03-15 Carroll E Church Mud separator
US3396844A (en) * 1964-05-20 1968-08-13 Ajem Lab Inc Vortical separator
US5571068A (en) * 1977-08-12 1996-11-05 Baxter International Inc. Centrifuge assembly
US5759147A (en) * 1977-08-12 1998-06-02 Baxter International Inc. Blood separation chamber
US5006103A (en) * 1977-08-12 1991-04-09 Baxter International Inc. Disposable container for a centrifuge
US5217427A (en) * 1977-08-12 1993-06-08 Baxter International Inc. Centrifuge assembly
US5217426A (en) * 1977-08-12 1993-06-08 Baxter International Inc. Combination disposable plastic blood receiving container and blood component centrifuge
US5078671A (en) * 1988-10-07 1992-01-07 Baxter International Inc. Centrifugal fluid processing system and method
US4936820A (en) * 1988-10-07 1990-06-26 Baxter International Inc. High volume centrifugal fluid processing system and method for cultured cell suspensions and the like
US5387342A (en) * 1992-06-10 1995-02-07 Charles W. Taggart Centrifugal separator and method
US6346069B1 (en) 1999-08-06 2002-02-12 Separation Process Technology, Inc. Centrifugal pressurized separators and methods of controlling same
US6607473B2 (en) 1999-08-06 2003-08-19 Econova Inc. Methods for centrifugally separating mixed components of a fluid stream under a pressure differential
US6719681B2 (en) 1999-08-06 2004-04-13 Econova, Inc. Methods for centrifugally separating mixed components of a fluid stream
US20040192533A1 (en) * 1999-08-06 2004-09-30 Econova, Inc. Centrifugal separators
US7060017B2 (en) 1999-08-06 2006-06-13 Econova, Inc. Centrifugal separators
US20060217255A1 (en) * 1999-08-06 2006-09-28 Econova, Inc. Method for separating particulate matter from a fluid stream
US7314441B2 (en) 1999-08-06 2008-01-01 Econova, Inc. Method for separating particulate matter from a fluid stream
WO2024257168A1 (ja) * 2023-06-12 2024-12-19 巴工業株式会社 竪型遠心分離装置

Also Published As

Publication number Publication date
DE1040459B (de) 1958-10-02
NL181147B (nl)
NL96812C (en(2012))
GB749786A (en) 1956-05-30

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