EP0801593A1 - Centrifugeuse a bol plein - Google Patents

Centrifugeuse a bol plein

Info

Publication number
EP0801593A1
EP0801593A1 EP95935450A EP95935450A EP0801593A1 EP 0801593 A1 EP0801593 A1 EP 0801593A1 EP 95935450 A EP95935450 A EP 95935450A EP 95935450 A EP95935450 A EP 95935450A EP 0801593 A1 EP0801593 A1 EP 0801593A1
Authority
EP
European Patent Office
Prior art keywords
liquid
liquid level
drum
centrifuge according
sealing
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.)
Granted
Application number
EP95935450A
Other languages
German (de)
English (en)
Other versions
EP0801593B1 (fr
Inventor
Willi Ostkamp
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.)
GEA Mechanical Equipment GmbH
Original Assignee
Westfalia Separator GmbH
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 Westfalia Separator GmbH filed Critical Westfalia Separator GmbH
Publication of EP0801593A1 publication Critical patent/EP0801593A1/fr
Application granted granted Critical
Publication of EP0801593B1 publication Critical patent/EP0801593B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • B04B11/08—Skimmers or scrapers for discharging ; Regulating thereof
    • B04B11/082—Skimmers for discharging liquid
    • 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
    • B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
    • 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
    • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
    • B04B2001/2083—Configuration of liquid outlets

Definitions

  • the invention relates to a solid bowl centrifuge with a centrifugal drum for separating a solid-liquid mixture, the drum interior being separated from a discharge chamber for the separated liquid by a weir disk rotating with the centrifugal drum, the inside diameter of which is the inner diameter of the liquid level in the interior of the drum.
  • Such a centrifuge is known for example from DE 37 28 901 Cl.
  • the discharge device for the separated solid is usually designed in such a way that no liquid can run over it.
  • the separated liquid can therefore only escape through the inside diameter of the weir disk, so that this diameter determines the liquid level in the interior of the drum.
  • the weir is formed by two weir disks which are spaced apart and which have a different inside diameter.
  • Weir disks can optionally be activated by a hydraulically actuated slide in order to set two different liquid levels in the centrifugal drum.
  • An infinitely variable choice of the liquid level is not possible here and the design effort is relatively high.
  • the invention is based on the object of designing the centrifugal drum in such a way that the liquid level in the interior of the drum can be varied continuously with little design effort.
  • This object is achieved in that two flat surfaces of the weir disk are assigned locking disks which are connected to one another in a gas-tight manner by a cylinder part penetrating the inner diameter of the weir disk, the first locking disk immersing in the liquid level of the drum interior and the second locking disk immersing in the liquid level of the discharge chamber and the da ⁇ formed by the pressure chamber is acted upon by a gas supply channel with a gas variable pressure, which allows a continuous change in the liquid level in the interior of the drum.
  • the locking disks are arranged in a stationary manner.
  • the connection of the pressure chamber with the stationary gas supply channel is therefore possible without using a rotating seal.
  • the second locking disk is designed as a peeling element. This results in a structurally simple solution for centrifuges with peeling discs.
  • both flat surfaces of the weir disk are provided with ribs. This minimizes the centrifugal braking effect of the two locking disks.
  • a further advantageous embodiment is characterized in that the locking disks rotate with the centrifugal drum and a liquid-filled sealing chamber is provided on the radially inward side of the cylinder part, into which a gas guiding channel opens radially inward from the liquid level, with a stationary gas supply device with two radially outwards Sealing disks are provided, which dip into the liquid level of the sealing chamber on both sides of the gas supply channel.
  • the friction losses are very low due to the sealing washers immersed in the liquid, since the sealing washers have a much smaller diameter than the locking washers. Since the locking disks rotate themselves, they cause no loss of friction.
  • all flat surfaces of the sealing chamber facing the sealing disks are provided with ribs.
  • the sealing chamber is assigned a supply channel for sealing liquid.
  • the liquid level in the sealing chamber is maintained by the addition of sealing liquid.
  • an outlet channel is assigned to the sealing chamber.
  • the sealing chamber empties when the supply channel is closed. If it is not necessary to influence the liquid level, the friction losses can be eliminated.
  • the feed channel is connected to the discharge channel of a peeling element. In this embodiment, no special device for supplying sealing liquid is required.
  • the liquid level in the interior of the drum can be kept at the desired level in a simple manner by the gas supply channel being connected to a gas supply line in which a pressure control device is provided.
  • FIG. 1 shows a centrifugal drum with stationary locking disks
  • FIG. 2 shows a centrifugal drum with rotating locking disks.
  • FIG. 1 in FIG. 1 denotes the centrifugal drum, the drum interior 2 of which is separated from a discharge chamber 4 by a weir disk 3.
  • a first locking disk 5 and a second locking disk 6 are assigned to the two flat surfaces of the weir disk 3 and are connected to one another in a gas-tight manner by a cylinder part 7 penetrating the inner diameter of the weir disk 3 and are fixed in place. are arranged.
  • the first locking disk 5 is immersed in the liquid level of the drum interior 2 and the second locking disk 6 in the liquid level of the discharge chamber 4.
  • the second locking disk 6 is provided on a peeling element 8. Through the locking washers 5 and 6 is a
  • Pressure chamber 9 is formed, which is connected via a gas supply channel 10 and a gas supply line 11 to a gas pressure source, not shown.
  • a pressure control device 12 is provided in the gas supply line 11.
  • the minimum liquid level "D" is fixed by the inside diameter of the weir disk 3 and thus a preselection is made for the adjustment range to be expected. As a result, the control range for the gas pressure is not too large.
  • the pressure chamber 9 is pressurized via the gas supply line 11 and the gas supply channel 10. This pressure is transferred to the liquid located in the area of the pressure chamber 9. In order to compensate for this gas pressure, the liquid level in the drum interior 2 moves radially inwards until there is a pressure equilibrium between the corresponding liquids.
  • the liquid level in the interior of the drum 2 can thereby be shifted radially inwards up to a liquid level "d" corresponding to the compensation pressure, no liquid yet being able to escape at the discharge device for the solid.
  • the gas pressure is set in accordance with the desired liquid level and is kept at this level by the pressure control device 12 even in the event of fluctuations in the inlet.
  • the locking disks 5 and 6 rotate with the centrifugal drum 1. This eliminates the fluid friction between the locking disks 5 and 6 and the liquid in the interior of the drum 2 or the discharge chamber 4.
  • a gas supply device 13 is provided with two radially outwardly directed sealing disks 14 and 15, which dip into the liquid level of a sealing chamber 17 on both sides of a gas channel 16.
  • the gas pressure is transferred from the sealing chamber 17 to the pressure chamber 9 and thereby causes a radially inward displacement of the liquid level "D" in the interior of the drum 2 due to the effect described above.
  • the sealing disks 14 and 15 are provided with a much smaller diameter than the locking disks 5 and 6, the friction losses are significantly lower than in the embodiment according to FIG. 1.
  • a feed channel 18 which is connected to a discharge channel 19 of the peeling element 8 can be connected, a small amount of the derived liquid phase is continuously passed as sealing liquid into the sealing chamber 17 and thus ensures its filling.
  • the flat surfaces of the weir disc 3 are provided with ribs 20 and 21 and all the flat surfaces facing the sealing discs 14 and 15 are provided with ribs 22, 23 and 24.
  • the sealing chamber 17 can also be provided with an outlet channel 25 through which the sealing chamber 17 can empty when the supply channel 18 is shut off. If it is not necessary to influence the liquid level, the friction losses can be eliminated by emptying the sealing chamber 17.

Landscapes

  • Centrifugal Separators (AREA)

Abstract

La chambre intérieure (2) du tambour de la centrifugeuse décrite est séparée de la chambre d'évacuation (4) par une paroi protectrice (3). Les deux surfaces plates de la paroi (3) sont associées avec une première barrière (5) et une seconde barrière (6) qui sont jointes hermétiquement l'une à l'autre et fixées en place par un élément cylindrique (7) qui passe par le trou de la paroi protectrice (3). La première barrière (5) descend en-dessous du niveau du liquide se trouvant à l'intérieur du tambour et la seconde barrière (6) descend en-dessous du liquide se trouvant à l'intérieur de la chambre d'évacuation (4). Les deux barrières (5 et 6) forment une chambre de pression (9) sur laquelle peut agir un gaz sous pression amené par un canal d'alimentation en gaz (10) et par une conduite d'alimentation en gaz (11), le gaz sous pression faisant déplacer radialement vers l'intérieur le niveau (D) du liquide se trouvant à l'intérieur du tambour. Le liquide peut être amené à n'importe quel niveau entre D et d par variation de la pression du gaz.
EP95935450A 1995-01-11 1995-10-16 Centrifugeuse a bol plein Expired - Lifetime EP0801593B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19500600A DE19500600C1 (de) 1995-01-11 1995-01-11 Vollmantelzentrifuge
DE19500600 1995-01-11
PCT/EP1995/004054 WO1996021510A1 (fr) 1995-01-11 1995-10-16 Centrifugeuse a bol plein

Publications (2)

Publication Number Publication Date
EP0801593A1 true EP0801593A1 (fr) 1997-10-22
EP0801593B1 EP0801593B1 (fr) 1998-08-05

Family

ID=7751269

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95935450A Expired - Lifetime EP0801593B1 (fr) 1995-01-11 1995-10-16 Centrifugeuse a bol plein

Country Status (6)

Country Link
US (1) US5885202A (fr)
EP (1) EP0801593B1 (fr)
JP (1) JP2980690B2 (fr)
DE (2) DE19500600C1 (fr)
DK (1) DK0801593T3 (fr)
WO (1) WO1996021510A1 (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19830653C1 (de) * 1998-07-09 1999-11-11 Westfalia Separator Ag Verfahren und Vorrichtung zum Bestimmen des Flüssigkeitsspiegels in einem Dekanter
DK1232794T3 (da) 2001-02-08 2004-10-25 Westfalia Separator Ag Fremgangsmåde til adskillelse af en flerfaseblanding og et dekanteringscentrifugesystem til udövelse af fremgangsmåden
DE10143405C2 (de) * 2001-09-05 2003-12-18 Westfalia Separator Ag Schälscheibenvorrichtung zum Ableiten von Flüssigkeit aus einer Zentrifugentrommel
DE10203652B4 (de) * 2002-01-30 2006-10-19 Westfalia Separator Ag Vollmantel-Schneckenzentrifuge mit einem Wehr
DE10220757B4 (de) * 2002-05-08 2004-06-24 Westfalia Separator Ag Zentrifuge, insbesondere Separator
DE10223802B4 (de) * 2002-05-29 2005-06-09 Westfalia Separator Ag Vollmantel-Schneckenzentrifuge
DE10336350B4 (de) * 2003-08-08 2007-10-31 Westfalia Separator Ag Vollmantel-Schneckenzentrifuge, mit Schälscheibe
DE102005027553A1 (de) * 2005-06-14 2006-12-28 Westfalia Separator Ag Drei-Phasen-Vollmantel-Schneckenzentrifuge und Verfahren zur Regelung des Trennprozesses
CN100372614C (zh) * 2005-11-24 2008-03-05 张家港华大离心机制造有限公司 螺旋卸料过滤离心机
EP1800754A1 (fr) * 2005-12-21 2007-06-27 Jean-Denis Rochat Dispositif jetable de centrifugation sanguine
EP2015871B1 (fr) 2006-05-11 2017-04-26 GEA Mechanical Equipment GmbH Séparateur à trois phases avec un disque d'épluchage et des ouvertures de sortie de matières solides
DK200800555A (en) * 2008-04-16 2009-10-17 Alfa Laval Corp Ab Centrifugal separator
WO2010019418A2 (fr) 2008-08-15 2010-02-18 M-I Llc Centrifugeuse
DE102010012276A1 (de) * 2010-03-22 2011-09-22 Gea Westfalia Separator Gmbh Vollmantel-Schneckenzentrifuge
DE102012102478A1 (de) * 2012-03-22 2013-09-26 Hiller Gmbh Vollmantel-Schneckenzentrifuge
ES2807592T3 (es) * 2015-04-24 2021-02-23 Alfa Laval Corp Ab Separador centrífugo y métodos relacionados con el mismo
EP3156134B1 (fr) 2015-10-12 2018-07-25 Alfa Laval Corporate AB Séparateur centrifuge à évacuation intermittente de phase lourde
DE102022100511A1 (de) * 2022-01-11 2023-07-13 Gea Westfalia Separator Group Gmbh Vollmantel-Schneckenzentrifuge und Verfahren zur Regelung des Trennprozesses der Vollmantel-Schneckenzentrifuge

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3179334A (en) * 1961-09-15 1965-04-20 Pennsalt Chemicals Corp Centrifuge discharge means
SE456562B (sv) * 1981-10-22 1988-10-17 Westfalia Separator Ag Centrifug med vertikal vridaxel
DE3344432C2 (de) * 1983-12-08 1987-04-23 Flottweg-Werk Bird Machine GmbH, 8313 Vilsbiburg Zentrifuge zur Trennung einer Suspension mit zwei getrennt abzuführenden Flüssigkeitsphasen
DE3728901C1 (en) * 1987-08-29 1988-11-17 Westfalia Separator Ag Weir for adjusting the level of liquid in solid-bowl centrifuge drums of worm centrifuges
DE4014552C1 (fr) * 1990-05-07 1991-07-18 Westfalia Separator Ag, 4740 Oelde, De
DE4104483A1 (de) * 1991-02-14 1992-08-20 Kloeckner Humboldt Deutz Ag Verfahren zum betreiben einer schneckenzentrifuge und zentrifuge hierfuer
DE4126565C1 (en) * 1991-08-10 1992-11-12 Westfalia Separator Ag, 4740 Oelde, De Centrifuge drum for solids-liq. sepn.
US10200974B2 (en) 2013-01-08 2019-02-05 Intel IP Corporation Methods and arrangements to mitigate collisions in wireless networks

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9621510A1 *

Also Published As

Publication number Publication date
WO1996021510A1 (fr) 1996-07-18
JPH10507684A (ja) 1998-07-28
DE19500600C1 (de) 1996-02-08
US5885202A (en) 1999-03-23
JP2980690B2 (ja) 1999-11-22
DE59503096D1 (de) 1998-09-10
DK0801593T3 (da) 1999-05-03
EP0801593B1 (fr) 1998-08-05

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