WO1998036824A1 - Dispositif de filtration de liquides par ecoulement tangentiel - Google Patents

Dispositif de filtration de liquides par ecoulement tangentiel Download PDF

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Publication number
WO1998036824A1
WO1998036824A1 PCT/EP1998/001017 EP9801017W WO9836824A1 WO 1998036824 A1 WO1998036824 A1 WO 1998036824A1 EP 9801017 W EP9801017 W EP 9801017W WO 9836824 A1 WO9836824 A1 WO 9836824A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter elements
filter
permeate
wall
plate
Prior art date
Application number
PCT/EP1998/001017
Other languages
German (de)
English (en)
Inventor
Gerhard LÜTTICH
Ina Gehrhardt
Original Assignee
Nunner 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 Nunner Gmbh filed Critical Nunner Gmbh
Priority to DE29817019U priority Critical patent/DE29817019U1/de
Publication of WO1998036824A1 publication Critical patent/WO1998036824A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/147—Microfiltration
    • B01D61/1471—Microfiltration comprising multiple microfiltration steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/145—Ultrafiltration
    • B01D61/146—Ultrafiltration comprising multiple ultrafiltration steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
    • B01D63/06—Tubular membrane modules
    • B01D63/062—Tubular membrane modules with membranes on a surface of a support tube
    • B01D63/063—Tubular membrane modules with membranes on a surface of a support tube on the inner surface thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
    • B01D63/06—Tubular membrane modules
    • B01D63/066—Tubular membrane modules with a porous block having membrane coated passages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/04—Backflushing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/20—By influencing the flow
    • B01D2321/2066—Pulsated flow

Definitions

  • the invention relates to a device for cross-flow filtration of liquids.
  • Cross-flow or cross-flow filtration is a filtration process in which, in contrast to static filtration, the liquid to be filtered or cleaned is circulated parallel to a semi-permeable filter surface.
  • the filter surface is formed by the inner surfaces of a plurality of ceramic, semipermeable and essentially cylindrical or rod-shaped filter elements, the wall of which is semipermeable.
  • the filter elements consist, for example, of aluminum oxide or silicon carbide.
  • the proportion of liquid that penetrates the semi-permeable filter elements in the radial direction is referred to as permeate.
  • filter elements are used which practically only allow water molecules to pass through. In this way, a concentrated solution or suspension can be obtained as permeate purified water or as retentate.
  • EP 0 394 532 A1 describes a device for filtering liquids, in which a plurality of filter modules, each of which is enclosed in its own container, are arranged one behind the other in the flow direction. There is also a backwashing or backwashing device. Each the cascade-connected container is connected to a main supply line via a separate line in which a check valve is installed.
  • the invention is based on the object of proposing a device of the type mentioned at the outset in which the outlay on equipment for the rewinding device is reduced.
  • the filter elements are grouped into several filter modules.
  • the filter elements of a filter module are arranged essentially parallel to one another and connected in parallel in terms of flow.
  • Several filter modules are in turn arranged one behind the other or connected in series.
  • the arrangement of the filter modules specified in claim 3 is particularly space-saving.
  • the four-lip seal used has the advantage that the high manufacturing tolerances that often occur with ceramic filter elements can be compensated better than is the case with O-rings.
  • the essentially square or also rectangular four-lip seal lies with two sealing lips on the circumference of the filter elements on. It is easy to see that a diameter of a filter element which is larger than the nominal size can be compensated for without a substantial increase in the surface pressure acting on the circumference of the filter element. Retentate liquid under pressure penetrates into the radial gap between the filter element and the carrier plate, and in doing so deforms the four-lip seal elastically or presses the sealing lip which it presses against the peripheral surface of the filter element.
  • the carrier plate is then a plastic plate, which is coated on both sides with a reinforcing plate made of a metallic material, preferably made of steel or stainless steel.
  • a reinforcing plate made of a metallic material, preferably made of steel or stainless steel.
  • the carrier plates are preferably fixed to one another by means of spacer struts which run essentially parallel to the filter elements (claims 7 and 8).
  • Further advantageous refinements are mentioned in claims 9-15, in particular the refinement according to claim 14 ensures that no air cushion accumulates in the permeate space, which would prevent or at least impede the build-up of pressure in the permeate space in the event of back-pulsation.
  • claims 10-12 an advantageous possibility of forming a connecting channel connecting the retentate channels of two connecting channels connected one behind the other in the direction of flow, said channel also being designed to be streamlined.
  • FIG. 1 shows a functional diagram of a device according to the invention
  • FIG. 3 shows a cross section along the line III-III in FIG. 2 and
  • FIG. 4 shows a detail section designated IV in FIG. 2 in an enlarged representation.
  • Two filter modules 3, 4 are arranged next to one another in a permeate space 2 enclosed by a permeate container 1.
  • the filter modules each comprise a plurality of filter elements which are arranged in parallel next to one another and, viewed in terms of flow, are connected in parallel.
  • the filter modules 3, 4 comprise only two filter elements 5 for reasons of simplification.
  • the liquid to be filtered or the retentate is circulated and flows, driven by a pump 6, several times through the filter elements 5.
  • the liquid flow leaving the pump 6 is divided into partial flows 7, 8 according to the number of filter elements 5 of a filter module.
  • the partial flows 7, 8 are combined again and forwarded via a connecting channel 9 to the filter module following in the flow direction 10.
  • a connecting channel 9 On the input side there is again a branching into partial streams T and 8 'and on the output side a combination of the partial streams in a discharge channel 11.
  • a reservoir 12 is switched on in the retentate circuit mentioned. That which penetrates the filter elements essentially in the radial direction Permeate is continuously drawn off via a permeate line 15 and, for example, passed into a collecting container 16.
  • the permeate quantity which has passed into the permeate space 2 and is separated from the retentate stream is continuously replaced from a container 17 by a motor-driven refill pump 18.
  • the permeate line 15 branches off at a point as high as possible on the permeate container in order to prevent the accumulation of a gas-air mixture cushion in the container.
  • a back pulse device 19 is connected to the common permeate space containing the filter modules.
  • This essentially comprises a pump 20 which conveys, for example, retentate from the collecting container 16 at high pressure, preferably under pulsations and at intervals, into the permeate space 2 via a back pulse line 21.
  • the retentate penetrates the filter elements and detaches solids from the walls of the retentate channels.
  • a device of the type described can be used, for example, for wastewater treatment or for the production of fruit juice concentrates etc.
  • Each filter module includes, e.g. B. eight filter elements 5, which is bounded in a circular cross-section, in the circumferential direction by an essentially tubular section-shaped permeate container 1a.
  • the filter module 3a is arranged in one half 23 and the filter module 4a in the other half 24 of the permeate space 2 or the permeate container 22 (see FIG. 3).
  • the filter elements 5 of the filter modules 3a, 4a are grouped into two rows 26, 27 which are parallel to the diameter 25 of the permeate container and spaced from one another, the row 26 close to the diameter 25 comprising four filter elements and the row 27 further away comprising three filter elements.
  • the end portions of the filter elements 5 each lie in a receiving opening 28 passing through a carrier plate 29.
  • the carrier plate essentially consists of a plastic plate 33, which is covered on both sides with a reinforcing plate 34, 35 with through-openings 28a arranged coaxially to the receiving openings.
  • the carrier plates 29, 29a are connected to one another via spacer struts 36.
  • the spacer struts 36 run essentially parallel to the filter elements 5 and each have at their end regions an internal thread opening into their end face, into which a fastening screw 38 penetrating a through hole 37 of the carrier plate 29, 29a is screwed.
  • In the wall of the through hole 37 there is a radial groove in which a sealing ring 39 lies.
  • the permeate container 1 a has two terminal fastening flanges 42, 43 that extend radially outward from its peripheral surface.
  • the fastening flanges 42, 43 are penetrated by a plurality of fixing bores 44.
  • a wedge-shaped dividing wall 49 Arranged within the cover 46 is a wedge-shaped dividing wall 49 which tapers downwards and rests with its lower end on the carrier plate 29 and ends at an axial distance in front of the upper cover wall 50.
  • the partition wall 49 extends along the diameter line 25 (FIG. 3) and adjoins the side wall 51 of the cover 46. In this way, a connection channel 52 is formed which fluidly connects the filter elements of the filter module 3a with the filter elements of the filter module 4a.
  • the side wall 51 of the cover 46 is conical and tapers towards the upper cover wall 50. The thickness of the partition 49 steadily decreases from its free end to the support plate 29.
  • the U-shaped connecting channel 52 seen in cross section thus has two aerodynamically shaped legs 54, 55.
  • the leg 54 narrows - starting from its leg end - in the flow direction 10, whereas the leg 55 widens continuously from the free end of the dividing wall 49 in the flow direction, approximately up to the support plate 29.
  • the wedge angle ⁇ of the partition wall 49 and the cone angle of the side wall 51 each amount to a maximum of 14 °.
  • the partition 49 is of z. B. penetrates three through holes 56 which are arranged coaxially to the spacers 36a, 36b and 36c distributed on the diameter 25.
  • Fastening screws 57 are located in the through holes, the head 58 of which rests on a radial shoulder 59 of the through hole 56 and which is threaded into an internal thread on the end face of a spacer intervene be 36a, 36b, 36c.
  • the upper carrier plate 29 is arranged outside the permeate container 22 and adjoins with its side edge sealingly against a sealing wall 60 of the cover 46. Such a sealing wall would be more difficult to implement on the inside of the permeate section in the form of a tubular section, if only because of its high manufacturing tolerances.
  • a circumferential groove is arranged in the edge of the carrier plate 29, in which a sealing ring 61 lies.
  • the base 62 is basically a tube section which is closed on the underside by a base plate 63.
  • a feed channel 69 and a discharge channel 70 are arranged in the base.
  • the base 62 has at its upper end a radially outwardly extending counter flange 73 with which it is fixed to the fastening flange 43 of the permeate container 1 a.
  • the counter flange 73 is provided with a plurality of through bores 74 which are arranged coaxially with the fixing bores 44 of the fastening flange 43.
  • the carrier plate 29a extends between the flanges 43 and 73.
  • connection 76 which can be connected to the back pulse device 19 (FIG. 1).
  • a pressure gauge connection 77 is arranged near the mounting flange 42.
  • a comparable connection 78 is located near the mounting flange 43. This connection serves for emptying the permeate space or for coupling a pressure gauge.
  • a closable vent connection 79 is formed on the apex of the cover 46.
  • a permeate connection 96 is arranged in order to be able to draw off the permeate accumulating in the permeate space 22 via a permeate outlet channel 98 (FIG. 1).
  • an annular, four-lip seal 84 with an approximately square cross section lies in a circumferential radial groove in the wall thereof.
  • the sealing lips 85 of this sealing ring point approximately — seen in cross-section — into the four corners of a square and thus extend away from one another approximately in a star shape.
  • Two of the sealing lips 85a, 85b rest on the peripheral surface of the filter element 5.
  • a radial gap 81 is arranged between the wall of the receiving opening 28 and the filter element 5.
  • the other sealing lips 85c and 85d are supported on the wall of the receiving opening 28.
  • the filter elements 5 are approximately rod-shaped ceramic bodies with an approximately circular cross section. They are penetrated in the longitudinal direction by a plurality of retentate channels 90 arranged in parallel and at a radial distance from one another (FIG. 3). In the area of the wall 91 of the retentate channels, the ceramic material is compressed or has a microporosity that ensures the semipermeability of the filter elements. The remaining ceramic material of the filter elements 5, however, has larger pores.
  • the microporous wall 91 of the retentate channels 90 virtually forms a semipermeable membrane which retains the constituents to be filtered out of the liquid, for example dirt particles from waste water or, if appropriately designed, also substantially smaller particles, such as germs or the like.
  • Storage container 50 cover wall
  • Container 53 central longitudinal axis

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

Ce dispositif de filtration de liquides par écoulement tangentiel comprend plusieurs éléments céramiques semi-perméables de filtrage en forme de bâtons traversés dans le sens longitudinal par des canaux de rétentat (90). Tous les éléments de filtrage (5) sont montés dans une chambre commune de perméat (2) en communication fluide avec un dispositif de décolmatage à contre-courant (19).
PCT/EP1998/001017 1997-02-21 1998-02-23 Dispositif de filtration de liquides par ecoulement tangentiel WO1998036824A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE29817019U DE29817019U1 (de) 1997-02-21 1998-02-23 Vorrichtung zur Querstromfiltration von Flüssigkeiten

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19708698.5 1997-02-21
DE19708698 1997-02-21

Publications (1)

Publication Number Publication Date
WO1998036824A1 true WO1998036824A1 (fr) 1998-08-27

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ID=7822146

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1998/001017 WO1998036824A1 (fr) 1997-02-21 1998-02-23 Dispositif de filtration de liquides par ecoulement tangentiel

Country Status (1)

Country Link
WO (1) WO1998036824A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001096003A1 (fr) * 2000-06-14 2001-12-20 Societe Industrielle De La Vallee De L'aigues S.I.V.A. Dispositif de filtration integrant une boucle de circulation
FR2815269A1 (fr) * 2000-10-13 2002-04-19 Tech Avancees & Membranes Ind Dispositif et installation pour la filtration tangentielle incluant un mode de fonctionnement en retrofiltration
US8240482B2 (en) 2006-07-17 2012-08-14 Societe Industrielle De La Vallee De L'aigues S.I.V.A. Tangential filtration device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0217568A2 (fr) * 1985-09-24 1987-04-08 British Nuclear Fuels PLC Appareil de traitement de liquides
US4849104A (en) * 1986-12-03 1989-07-18 Societe Anonyme Dite Societe Des Ceramizues Techniques Method of assembling a ceramic support separator element module and resulting module
DE3807258A1 (de) * 1988-03-05 1989-09-14 Membraflow Gmbh & Co Kg Filter Verfahren und vorrichtung zum filtrieren von fluessigen medien
US4957625A (en) * 1986-08-20 1990-09-18 Toshiba Ceramics Co. Ltd. Ceramic filter modules in series with piston backwash
JPH02284607A (ja) * 1989-04-25 1990-11-22 Toshiba Corp ろ過装置
JPH07178396A (ja) * 1993-12-22 1995-07-18 Ishigaki Mech Ind Co 汚泥のろ過濃縮方法
JPH07251041A (ja) * 1994-03-16 1995-10-03 Ngk Insulators Ltd 膜分離装置及びその洗浄方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0217568A2 (fr) * 1985-09-24 1987-04-08 British Nuclear Fuels PLC Appareil de traitement de liquides
US4957625A (en) * 1986-08-20 1990-09-18 Toshiba Ceramics Co. Ltd. Ceramic filter modules in series with piston backwash
US4849104A (en) * 1986-12-03 1989-07-18 Societe Anonyme Dite Societe Des Ceramizues Techniques Method of assembling a ceramic support separator element module and resulting module
DE3807258A1 (de) * 1988-03-05 1989-09-14 Membraflow Gmbh & Co Kg Filter Verfahren und vorrichtung zum filtrieren von fluessigen medien
EP0394532A1 (fr) * 1988-03-05 1990-10-31 MEMBRAFLOW GMBH & CO. KG Filtersysteme Procédé et appareil de filtration de milieux liquides
JPH02284607A (ja) * 1989-04-25 1990-11-22 Toshiba Corp ろ過装置
JPH07178396A (ja) * 1993-12-22 1995-07-18 Ishigaki Mech Ind Co 汚泥のろ過濃縮方法
JPH07251041A (ja) * 1994-03-16 1995-10-03 Ngk Insulators Ltd 膜分離装置及びその洗浄方法

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 15, no. 56 8 February 1991 (1991-02-08) *
PATENT ABSTRACTS OF JAPAN vol. 95, no. 10 30 November 1995 (1995-11-30) *
PATENT ABSTRACTS OF JAPAN vol. 96, no. 2 29 February 1996 (1996-02-29) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001096003A1 (fr) * 2000-06-14 2001-12-20 Societe Industrielle De La Vallee De L'aigues S.I.V.A. Dispositif de filtration integrant une boucle de circulation
FR2810256A1 (fr) * 2000-06-14 2001-12-21 Vallee De L Aigues S I V A Soc Dispositif de filtration integrant une boucle de circulation
US7192522B2 (en) 2000-06-14 2007-03-20 Societe Industrielle De La Vallee De L'aigues S.I.V.A. Filtering device incorporating a circulation loop
FR2815269A1 (fr) * 2000-10-13 2002-04-19 Tech Avancees & Membranes Ind Dispositif et installation pour la filtration tangentielle incluant un mode de fonctionnement en retrofiltration
US8240482B2 (en) 2006-07-17 2012-08-14 Societe Industrielle De La Vallee De L'aigues S.I.V.A. Tangential filtration device

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