EP0255623B1 - Dispositif pour la séparation de suspensions - Google Patents

Dispositif pour la séparation de suspensions Download PDF

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Publication number
EP0255623B1
EP0255623B1 EP87110032A EP87110032A EP0255623B1 EP 0255623 B1 EP0255623 B1 EP 0255623B1 EP 87110032 A EP87110032 A EP 87110032A EP 87110032 A EP87110032 A EP 87110032A EP 0255623 B1 EP0255623 B1 EP 0255623B1
Authority
EP
European Patent Office
Prior art keywords
filtrate
annular chamber
lateral
drum
disposed
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
EP87110032A
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German (de)
English (en)
Other versions
EP0255623A3 (en
EP0255623A2 (fr
Inventor
Paul Dr.-Ing. Franzen
Günther Ing. Hultsch
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.)
Mannesmann Demag Krauss Maffei GmbH
Original Assignee
Krauss Maffei AG
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 Krauss Maffei AG filed Critical Krauss Maffei AG
Priority to AT87110032T priority Critical patent/ATE87506T1/de
Publication of EP0255623A2 publication Critical patent/EP0255623A2/fr
Publication of EP0255623A3 publication Critical patent/EP0255623A3/de
Application granted granted Critical
Publication of EP0255623B1 publication Critical patent/EP0255623B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B3/00—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering
    • 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

Definitions

  • the invention relates to a device for separating suspensions.
  • a device of this type is known from DE-A-2 603 619.
  • annular chamber In drum centrifuges for separating suspensions, it is known (DE-A-2 603 619) to arrange an annular chamber on the side of the drum base which is connected to a lateral filter medium.
  • the annular chamber can also be connected to the filter means of the drum shell (US-A-1 761 593).
  • the lateral annular chamber is emptied by means of a peeling tube which is pivotably mounted parallel to the axis of the drum.
  • the object of the invention is to provide a separating device of the type mentioned at the outset which enables both a short filtration period and a short drying spin time.
  • two separate lateral annular chambers are provided, which for the first time combine the possibility of backwashing both filter media with the possibility of removing side filtrate during the main filtration
  • a siphon effect can be generated for the dry spin process by lowering the liquid level in the annular chamber for jacket filtrate to such an extent that an additional pressure difference is effective to accelerate the filtration.
  • the greatest effect can be achieved if the collecting space for the jacket filtrate between the drum jacket and the filter medium is connected to a room with lower pressure levels (e.g. atmospheric pressure) and the centrifugal housing, which is sealed on all sides, is pressurized with a gaseous pressure medium of e.g. 2 to 4 bar overpressure.
  • the centrifuge drum designated by 10 in FIG. 1 is rotatably supported with its shaft 11 about a horizontal axis 12.
  • Filter means 15 and 17 are attached to the drum jacket 13 and the drum base 14 in such a way that a collecting space 16 is present between the drum base 14 and filter means 17 and a collection space 18 is provided between the drum jacket 13 and filter means 15.
  • the centrifuge drum 10 On the end face opposite the drum base 14, the centrifuge drum 10 has an opening 28 which serves for filling with suspension before the start of the filtration and for discharging the solids retained by the filter means 15, 17 after the filtration has taken place.
  • 1 shows the state at the start of the filtration: the suspension consisting of filtrate liquid 20 and solids 21 is filled almost up to the height B (FIG. 2) of the rim 19 between the drum jacket 13 and the drum opening 28, the centrifuge drum 10 having a high rotational speed is rotated about the axis 12.
  • the filtrate liquid 20 essentially flows through the lateral filter medium 17 into the collecting space 16 located behind it.
  • a further part of the filtrate liquid 20 passes through the layer of solids 21 referred to as filter cake and flows through the jacket-side filter medium 15 into the one below located collection space 18. Since fine-grained sediment can separate very quickly from the filtrate liquid 20 located on the filter cake, the path of the filtrate liquid 20 through the filter cake may be made more difficult.
  • annular chamber 22 for side filtrate and an annular chamber 24 for jacket filtrate on the side next to the drum base 14. 2, the annular chamber 24 has been omitted for simplification.
  • the annular chamber 22 is arranged closer to the drum base 14 than the annular chamber 24, such that the bottom of the annular chamber 22 is located radially inside the bottom of the annular chamber 24.
  • “radial” is always understood to refer to the axis of rotation 12 of the drum 10.
  • the annular chamber 22 is connected to the collecting space 16 via a bore 23 in the drum bottom 14.
  • a valve consisting of valve ball 29 and valve seat 30 is arranged within bore 23 to shut off collecting space 16 while drum 10 is being filled with suspension.
  • the valve 29/30 can be controlled hydrostatically in such a way that liquid is poured into the annular chamber 22, the level of this barrier liquid lying above the radially inner edge of the lateral filter medium 17, so that the hydrostatic pressure of the barrier liquid against the filter medium 17 is greater than the hydrostatic pressure of the suspension.
  • a peeling tube 26 is used, which is pivotably mounted axially parallel to the axis of rotation 12 of the drum 10 and can be pivoted into the annular chamber 22 with its front mouthpiece 26a or pivoted out of the annular chamber 22. Liquid can also be introduced into the annular chamber 22 via the peeling tube 26; However, it is better if a separate tube 25 (FIG. 2) is provided for this purpose, which is guided axially parallel to the axis of rotation 12 and projects into the annular chamber 22 with its bent spout end.
  • rinsing liquid can also be introduced into the annular chamber 22 and from there through the opened bore 23 against the filter medium 17, after the filtration process has ended when the filter cake has been removed from the filter medium 15, 17 Backwash filter media 17.
  • the annular chamber 24 for the jacket filtrate is behind the collecting chamber 18 via a bore 25a in the drum jacket 13 or, as indicated by the dashed line, through a bore 25b in the drum bottom 14 the jacket-side filter means 15 connected.
  • the bore 25b runs essentially parallel to the drum jacket 13 and in the example shown opens into the annular chamber 24 at a radially relatively high point, since the annular chamber 24 has its radially lowest point below the drum jacket 13 because of the alternatively provided bore 25a.
  • Such a deep positioning of the annular chamber 24 is not necessary in the case of the bore 25b; rather, in this embodiment, the annular chamber 24 can be positioned so that the bore 25b opens at the bottom of the annular chamber 24.
  • a siphon is formed by the positioning of the annular chamber 24 shown in FIG. 1, the bore 25a in the drum jacket 13 running at an angle of 30 ° to 60 ° to the axis of rotation 12 and opening at the deep bottom of the annular chamber 24.
  • a liquid level must be present in the annular chamber in the manner shown, which just barely completely covers the mouth of the obliquely running bore 25a.
  • the radial difference between this liquid level and the surface of the jacket-side filter means 15 acts as an additional pressure difference to accelerate the filtration during the dry spin.
  • Dry spinning begins as soon as the level of the filtrate liquid 20 has entered the filter cake (layer of solids 21), which is the case when the filtrate liquid 20 passes through the filter medium 17 as a side filtrate and as a jacket filtrate (to a much lesser extent than the side filtrate) has been separated off via the filter medium 15.
  • the filtrate liquid flowing off during dry centrifugation reaches the annular chamber 24 essentially as a jacket filtrate.
  • a further peeling pipe 27 is pivotally mounted axially parallel to the axis of rotation 12, which has its mouthpiece 27a can be pivoted into the annular chamber 24 or pivoted out of the annular chamber 24.
  • a rinsing liquid can be introduced into the annular chamber 24 via the peeling tube 27 after completion of the filtration in order to backwash the filter medium 15 on the jacket side.
  • the filter means 17 provided for the side filtration are preferably designed as round discs which, in the case of FIG. 3, are arranged in a circle on the drum base 14 in a uniform distribution.
  • Each disc consists of 5 and 6 can be seen, from a support frame 31 which is wheel-shaped with a central hub 31a.
  • a screw 33 is passed through the hub 31a and is screwed into a threaded bore 14a of the drum base 14.
  • the support frame 31 is sealed against the drum base 14 at its circumferential area by means of an inserted sealing ring 35.
  • the frame construction of the subframe 31 allows four segment windows to be created, in which the filter means 17 is correspondingly attached in the form of a segment.
  • a corrugated support grid 32 is attached between each filter segment and the surface of the drum base 14, whereby the inflation of the filter medium 17 during backwashing is kept within limits and at the same time an unimpeded outflow of the side filtrate into the annular chamber 22 is ensured.
  • FIGS. 7 and 8 A further embodiment of the filter means 17 is illustrated in FIGS. 7 and 8.
  • a support frame 31 made of castable or sprayable plastic is provided, which has segment-like recesses of different shapes, in which the filter means 17 are used in the same way as for the rounds according to FIGS. 5 and 6, which in turn are supported on support grids 32.
  • an annular groove 14b is formed in the drum base 14, into which the support frames 31 are inserted flush with the surface of the drum base 14.
  • fastening screws 33 are provided, which push through each support frame 31 at two widened locations and are screwed into associated holes in the drum base 14.
  • the support frame 31 is sealed by means of sealing beads 35a, which are inserted between the end faces of the support frame 31 and the flanks of the groove 14b. Such sealing beads can optionally be dispensed with if the support frames 31 are made of a material of high elasticity.
  • the rule of thumb for the dimensioning of the filter means 17 in the segments of the support frame 31 is that the total area of the filter means 17 relative to the total area of the drum shell 13 is in the range between about 1:20 and about 1:60.

Claims (10)

  1. Dispositif pour la séparation de suspensions, comportant un tambour de centrifugation (10) muni, sur la surface de son enveloppe, de moyens de filtration (15) à travers lesquels un filtrat périphérique peut s'écouler, le filtrat périphérique pouvant être évacué d'une chambre annulaire (24) reliée à un compartiment collecteur (18), et le tambour de centrifugation (10) étant pourvu, sur au moins une région de sa surface latérale, de moyens de filtration (17) à travers lesquels peut s'écouler un filtrat latéral pouvant être évacué d'une chambre annulaire latérale (22) qui est en liaison avec un compartiment collecteur (16) prévu, pour le filtrat latéral, entre le fond (14) du tambour et le moyen de filtration (17), caractérisé par le fait que
    - le compartiment collecteur (18) destiné au filtrat périphérique est interposé entre l'enveloppe (13) du tambour et le moyen de filtratian (15) associé,
    - le filtrat périphérique est évacué par l'intermédiaire d'une chambre annulaire latérale (24) qui
    - est agencée sur le côté de la chambre annulaire (22) destinée au filtrat latéral, de telle sorte que le fond de la chambre annulaire (22) à filtrat latéral se trouve à l'intérieur du fond de la chambre annulaire (24) à filtrat périphérique, et
    - le compartiment (16) collecteur du filtrat latéral peut être isolé lors du remplissage du tambour (10) par une suspension.
  2. Dispositif selon la revendication 1, caractérisé par le fait que des tubes gainés (26, 27), montés à pivotement parallèlement à l'axe du tambour de centrifugation (10) et prévus pour l'évacuation respective du filtrat périphérique ou latéral, peuvent être introduits par pivotement, par une embouchure antérieure (26a, 27a), dans la chambre annulaire latérale (22, respectivement 24) respectivement associée.
  3. Dispositif selon la revendication 1, caractérisé par le fait que les chambres annulaires latérales (22, 24) sont disposées sur le fond (14) du tambour de centrifugation (10).
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé par le fait que la chambre annulaire (22) destinée au filtrat latéral est plus rapprochée du fond (14) du tambour que la chambre annulaire (24) destinée au filtrat périphérique, le fond de la chambre annulaire (22) à filtrat latéral occupant une position radiale à l'intérieur du fond de la chambre annulaire (24) à filtrat périphérique
  5. Dispositif selon l'une des revendications 1 à 4, caractérisé par le fait que la chambre annulaire (24) à filtrat périphérique est reliée, au compartiment collecteur (18), par l'entremise d'un perçage (25a, respectivement 25b) qui s'étend soit pour l'essentiel parallèlement à l'enveloppe (13) du tambour, soit selon un angle par rapport à cette dernière.
  6. Dispositif selon l'une des revendications 1 à 5, caractérisé par le fait qu'un liquide de rinçage peut être introduit dans au moins l'une (22) des chambres annulaires (22, 24), en vue du rinçage à contre-courant du moyen de filtration (17) en liaison avec la chambre annulaire (22) considérée.
  7. Dispositif selon l'une des revendications 1 à 6, caractérisé par le fait qu'une soupape (29, 30), pouvant se fermer sous une pression hydrostatique, est logée dans un perçage (23) entre la chambre annulaire (22) à filtrat latéral et un autre compartiment collecteur (16), interposé entre le fond (14) du tambour et le moyen latéral de filtration (17), le perçage considéré (23) débouchant dans la zone radialement la plus profonde de la chambre annulaire (22) (figure 4).
  8. Dispositif selon l'une des revendications 1 à 7, caractérisé par le fait qu'un espacement radial (H) est réservé entre le moyen de filtration (17) affecté à la filtration latérale et le moyen de filtration (15) affecté à la filtration périphérique, lequel espacement se situe dans la plage comprise entre environ 20 % et environ 60 % de la hauteur (B) d'un anneau de bordure (19) intercalé entre l'enveloppe (13) du tambour et un orifice latéral de remplissage (28) (figure 2).
  9. Dispositif selon l'une des revendications 1 à 8, caractérisé par le fait que la surface totale des moyens de filtration (17) affectés à la filtration latérale se situe, par rapport à la surface totale de l'enveloppe (13) du tambour, dans la plage comprise entre environ 1 : 20 et 1 : 60.
  10. Dispositif selon l'une des revendications 1 à 9, caractérisé par le fait que les moyens de filtration (17) affectés à la filtration latérale sont retenus dans un châssis de support (31), avec formation de plusieurs secteurs filtrants (figures 5 à 8).
EP87110032A 1986-08-02 1987-07-11 Dispositif pour la séparation de suspensions Expired - Lifetime EP0255623B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87110032T ATE87506T1 (de) 1986-08-02 1987-07-11 Vorrichtung zum trennen von suspensionen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3626314 1986-08-02
DE3626314A DE3626314C2 (de) 1986-08-02 1986-08-02 Vorrichtung zum Trennen von Suspensionen

Publications (3)

Publication Number Publication Date
EP0255623A2 EP0255623A2 (fr) 1988-02-10
EP0255623A3 EP0255623A3 (en) 1989-12-06
EP0255623B1 true EP0255623B1 (fr) 1993-03-31

Family

ID=6306631

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87110032A Expired - Lifetime EP0255623B1 (fr) 1986-08-02 1987-07-11 Dispositif pour la séparation de suspensions

Country Status (5)

Country Link
US (1) US4895666A (fr)
EP (1) EP0255623B1 (fr)
JP (1) JPH0720559B2 (fr)
AT (1) ATE87506T1 (fr)
DE (1) DE3626314C2 (fr)

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US4759913A (en) * 1987-04-15 1988-07-26 Freeport Research And Engineering Company Recovery of liquid phases from three phase emulsions formed in solvent extraction processes
DE3817126A1 (de) * 1988-05-19 1989-11-30 Krauss Maffei Ag Filterzentrifuge zum trennen von suspensionen
DE4101498A1 (de) * 1991-01-19 1992-07-23 Krupp Buckau Maschinenbau Gmbh Filterzentrifuge
US5149432A (en) * 1991-04-30 1992-09-22 Aaron Lavin Centrifuge for separating liquids of different specific gravities
FR2792333B1 (fr) 1999-04-14 2003-01-24 Labonord Dispositif de depot de cellules sur une plaque d'analyse
US6524231B1 (en) * 1999-09-03 2003-02-25 Baxter International Inc. Blood separation chamber with constricted interior channel and recessed passage
DE10114598A1 (de) * 2001-03-23 2002-10-02 Aventis Pharma Gmbh CIP-gerechte Ausführung einer Horizontalzentrifuge mit Vollmanteltrommel
US7297272B2 (en) 2002-10-24 2007-11-20 Fenwal, Inc. Separation apparatus and method
US7686965B2 (en) * 2006-05-31 2010-03-30 Cook Melvin W Centrifugal fluid filtration devices, systems and methods
US8075468B2 (en) * 2008-02-27 2011-12-13 Fenwal, Inc. Systems and methods for mid-processing calculation of blood composition
US8685258B2 (en) * 2008-02-27 2014-04-01 Fenwal, Inc. Systems and methods for conveying multiple blood components to a recipient
DE102011010621A1 (de) 2011-02-08 2012-08-09 T & A Trenntechnik & Anlagenbau Gmbh Vollmantelzentrifuge mit Trocknung des Feststoffkuchens
US9484122B2 (en) 2011-12-30 2016-11-01 Ge-Hitachi Nuclear Energy Americas Llc Post-accident fission product removal system and method of removing post-accident fission product
DE102012220250A1 (de) * 2012-11-07 2014-05-08 Hahn-Schickard-Gesellschaft für angewandte Forschung e.V. Fluidikmodul für eine zentrifugale filtration und verfahren zum filtern einer probe
JP2021506576A (ja) * 2017-12-19 2021-02-22 ゼロス リミテッド 処理装置のためのろ過器
KR102504657B1 (ko) * 2019-11-18 2023-02-27 주식회사 엘지화학 가압 원심 탈수기

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US1747144A (en) * 1925-06-05 1930-02-11 Western States Machine Co Centrifugal basket
BE349605A (fr) * 1927-03-12
DE1025793B (de) * 1956-06-23 1958-03-06 Krauss Maffei Ag Vorrichtung zur Seitenfiltration in Siebschleudertrommeln
DE1151764B (de) * 1960-07-30 1963-07-18 Krupp Dolberg G M B H Verfahren und Zentrifuge zum Schleudern schwer filtrierbarer Gueter
BE638716A (fr) * 1962-10-16
DE2260461C3 (de) * 1972-12-11 1980-06-04 Krauss-Maffei Ag, 8000 Muenchen Filterzentrifuge
US4119542A (en) * 1974-10-18 1978-10-10 Matsushita Electric Industrial Company, Limited Centrifugal separator
DE2603610A1 (de) * 1976-01-30 1977-08-04 Krauss Maffei Ag Zentrifugentrommel mit seitenfiltration
JPS5934432A (ja) * 1982-08-23 1984-02-24 Toyota Motor Corp 内燃機関の空燃比制御装置
DE3329648C2 (de) * 1983-08-17 1985-09-05 Krupp Industrietechnik GmbH Werk Buckau Wolf, 4048 Grevenbroich Siebzentrifuge für kontinuierlichen Betrieb, insbesondere Zuckerzentrifuge
CN85100169B (zh) * 1985-04-01 1985-09-10 中南制药机械厂 旁滤式自动离心机

Also Published As

Publication number Publication date
DE3626314A1 (de) 1988-02-04
ATE87506T1 (de) 1993-04-15
JPS6342754A (ja) 1988-02-23
US4895666A (en) 1990-01-23
EP0255623A3 (en) 1989-12-06
DE3626314C2 (de) 1993-11-11
JPH0720559B2 (ja) 1995-03-08
EP0255623A2 (fr) 1988-02-10

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