DE10209170C1 - Mechanically cleaning hollow fiber membranes comprises forming hollow fibers into bundles, vertically joining together on their opposite-lying ends, and grasping in center to set at angle - Google Patents

Mechanically cleaning hollow fiber membranes comprises forming hollow fibers into bundles, vertically joining together on their opposite-lying ends, and grasping in center to set at angle

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Publication number
DE10209170C1
DE10209170C1 DE2002109170 DE10209170A DE10209170C1 DE 10209170 C1 DE10209170 C1 DE 10209170C1 DE 2002109170 DE2002109170 DE 2002109170 DE 10209170 A DE10209170 A DE 10209170A DE 10209170 C1 DE10209170 C1 DE 10209170C1
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DE
Germany
Prior art keywords
hollow fiber
fiber membranes
angle
bundles
fiber membrane
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 - Fee Related
Application number
DE2002109170
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German (de)
Inventor
Horst Chmiel
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.)
CHMIEL, HORST, PROF. DR.-ING., 80689 MUENCHEN, DE
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE2002109170 priority Critical patent/DE10209170C1/en
Application granted granted Critical
Publication of DE10209170C1 publication Critical patent/DE10209170C1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • 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
    • B01D63/16—Rotary, reciprocated or vibrated modules
    • 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
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/20—By influencing the flow
    • B01D2321/2033—By influencing the flow dynamically
    • B01D2321/2058—By influencing the flow dynamically by vibration of the membrane, e.g. with an actuator
    • 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

Abstract

Mechanically cleaning hollow fiber membranes (1) comprises forming the hollow fibers into bundles, vertically joining together on their opposite-lying ends, and additionally grasping in the center to set at an angle and to cyclically shake via braces (3). An Independent claim is also included for a device for mechanically removing deposits from the outer surface of hollow fiber membranes. Preferred Features: Two hollow fiber membrane bundles are arranged over each other and are grasped at their connecting site. Several hollow fiber membrane bundles are grasped in a grid-like manner and shaken.

Description

Die vorliegende Erfindung betrifft ein Verfahren und eine Vorrichtung zur mechanischen Reinigung von Hohlfaser-Membranen.The present invention relates to a method and an apparatus for mechanical Cleaning of hollow fiber membranes.

Hohlfaser-Membranen sind dünnwandige poröse Polymer-Rohre mit einem inneren ∅ von etwa 0,1 mm bis 2 mm, die von außen nach innen von Wasser durchströmt und da­ bei gelöste oder suspendierte Schmutzstoffe zurückhalten. Aus zahlreichen Publikatio­ nen ist bekannt, dass sich die äußere Oberfläche derartiger Membranen mit den zu­ rückgehaltenen Stoffen und insbesondere mit Mikroorganismen so belegt, dass der Wasserfluss durch die Membran, die sogenannte Permeabilität, bei vorgegebenem Dif­ ferenzdruck ständig abnimmt. In zahlreichen Patent- und Offenlegungsschriften werden daher Vorschläge unterbreitet, wie diese Ablagerungen auf der Membran verhindert o­ der wenigstens von Zeit zu Zeit beseitigt werden können.Hollow fiber membranes are thin-walled porous polymer tubes with an inner ∅ from about 0.1 mm to 2 mm, through which water flows from outside to inside and there hold back loosened or suspended contaminants. From numerous publications NEN is known that the outer surface of such membranes with the retained substances and in particular with microorganisms so that the Water flow through the membrane, the so-called permeability, with a given dif reference pressure is constantly decreasing. In numerous patent and published documents therefore makes suggestions on how this prevents deposits on the membrane o which can at least be eliminated from time to time.

So wird in EP 0669851 B1 eine rahmenlose (senkrechte) Anordnung von Hohlfasern beschrieben, bei denen die Ablagerungen dadurch verhindert werden sollen, dass man Gasblasen von 1 mm bis 50 mm ∅ aufsteigen lässt, die die Oberfläche der Membranen von den darauf abgelagerten Verunreinigungen befreien sollen. Diese ständige großbla­ sige Belüftung bedeutet einen hohen Energieverbrauch und ist für anaerobe Prozesse nicht geeignet. Offensichtlich ist sie auch nicht effektiv genug.EP 0669851 B1 describes a frameless (vertical) arrangement of hollow fibers described, in which the deposits are to be prevented by one Gas bubbles from 1 mm to 50 mm ∅ rise up the surface of the membranes to get rid of the impurities deposited on it. This constant big blue Adequate ventilation means high energy consumption and is for anaerobic processes not suitable. Obviously, it isn't effective enough either.

In der EP 073818 B1 wird daher zusätzlich eine diffusive Rückspülung vorgeschlagen. Dennoch beobachtet man am Fuß der senkrecht angeordneten Hohlfaser-Membranen größere Ablagerungen.Diffusive backwashing is therefore additionally proposed in EP 073818 B1. Nevertheless, one observes at the foot of the vertically arranged hollow fiber membranes larger deposits.

Offensichtlich genügen diese Maßnahmen nicht, um Ablagerungen vollständig zu ver­ meiden. Daher ist es Aufgabe der vorliegenden Erfindung, ein effektiveres Verfahren und Vorrichtung zur mechanischen Reinigung von Hohlfaser-Membranen zu schaffen.Obviously, these measures are not sufficient to completely cover deposits avoid. It is therefore an object of the present invention to provide a more effective method and to provide a device for the mechanical cleaning of hollow fiber membranes.

In der vorliegenden Erfindung wird daher vorgeschlagen, die Hohlfasern gemäß Fig. 1 nicht senkrecht, sondern um einen Winkel schräg zu stellen und sie etwa in der Mitte nochmals zu fassen, bzw. zwei Hohlfaserbündel übereinander anzuordnen und sie über eine Befestigung miteinander zu verbinden, um sie zyklisch einer Schüttelbewegung auszusetzen.In the present invention it is therefore proposed not to place the hollow fibers according to FIG. 1 vertically, but to incline them at an angle and to grasp them again approximately in the middle, or to arrange two hollow fiber bundles one above the other and to connect them to one another by means of a fastening in order to exposing them to a cyclical shaking motion.

In Fig. 1 bedeuten dabei 1 die Hohlfaser-Membranen, 2 die Befestigungen der Hohlfa­ sern (in der Regel ein Harz, in das die Hohlfaser-Membranen eingeklebt sind) und 3 ei­ ne Verstrebung, mit der die Befestigung im bestimmten Zeitintervall hin und her bewegt (d. h. geschüttelt) werden kann.In Fig. 1 mean 1 the hollow fiber membranes, 2 the fasteners of the Hohlfa sern (usually a resin, in which the hollow fiber membranes are glued) and 3 ei ne strut with which the fastening back and forth in a certain time interval can be moved (ie shaken).

Bei einer besonders vorteilhaften Ausführung dieser Vorrichtung besteht die Verstre­ bung aus einem Rohr oder einem Schlauch, über den in bestimmten Zeitabständen eine Rückspülung der Hohlfasern umgekehrt zur Strömungsrichtung (also von innen nach außen) erfolgen kann. Bei dem zur Rückspülung verwendeten Fluid kann es sich z. B. um Permeat, Reinigungs- oder Desinfektionslösung handeln.In a particularly advantageous embodiment of this device, the bracing Exercise from a tube or a hose over which a Backwashing of the hollow fibers reversed to the direction of flow (i.e. from the inside to the back outside) can be done. The fluid used for backwashing can be e.g. B. are permeate, cleaning or disinfectant solution.

Bei richtiger Frequenz dieser Schüttelbewegung wurde überraschend eine praktisch vollständige Entfernung der Ablagerungen auf den Hohlfaser-Membranen beobachtet. Der Effekt kann noch dadurch verstärkt werden, dass man synchron zu der Schüttelbe­ wegung einen einmaligen hydraulischen Impuls erzeugt. Dieser Impuls kann durch eine Pumpe oder eine große Luftblase ausgelöst werden.At the correct frequency of this shaking motion, a surprisingly practical one Complete removal of the deposits on the hollow fiber membranes was observed. The effect can be enhanced by synchronizing with the shaking tube movement generates a unique hydraulic pulse. This impulse can be caused by a Pump or a large air bubble may be triggered.

Die oben genannte Schüttelbewegung kann beispielsweise durch einen Exzenterantrieb erzeugt werden. Vorzugsweise wird man mehrere Module gleichzeitig dieser Schüttel­ bewegung aussetzen.The above-mentioned shaking movement can be done, for example, by an eccentric drive be generated. It is preferable to use several shaking modules at the same time suspend movement.

Fig. 2 zeigt eine derartige Anordnung in einer Draufsicht. In einem Gitter 3, das z. B. aus Edelstahl oder Kunststoff - gegebenenfalls wieder als Rohre oder Schläuche ausgeführt - bestehen kann, sind die Hohlfaser-Membranen wiederum in etwa in der Mitte durch z. B. einen Kunststoffkleber fixiert. Das Gitter 3 wird wiederum im bestimmten Zeitintervall so hin und her bewegt, dass die Ablagerungen von den Membranoberflächen abge­ schüttelt werden. Fig. 2 shows such an arrangement in a plan view. In a grid 3 , the z. B. made of stainless steel or plastic - possibly again made as pipes or hoses - the hollow fiber membranes are again in the middle by z. B. fixed a plastic adhesive. The grid 3 is in turn moved back and forth at a certain time interval in such a way that the deposits are shaken off the membrane surfaces.

Claims (12)

1. Verfahren zur mechanischen Reinigung von Hohlfasermembranen, wobei Ablagerungen auf der Aussenoberfläche der von außen nach innen von Wasser durchströmbaren Hohlfaser-Membranen beseitigt werden, indem die Hohlfasern zyklisch einer Schüttelbewegung ausgesetzt werden, dadurch gekennzeichnet, dass
die Hohlfasern gebündelt,
an ihren gegenüberliegenden Enden senkrecht übereinander befestigt und
zusätzlich in ihrer Mitte gefasst werden,
um sie um einen Winkel schräg zu stellen und über Verstrebungen zyklisch zu schütteln.1. A method for the mechanical cleaning of hollow fiber membranes, wherein deposits on the outer surface of the hollow fiber membranes through which water can flow from the outside in are removed by cyclically exposing the hollow fibers to a shaking movement, characterized in that
the hollow fibers are bundled,
fastened vertically one above the other at their opposite ends and
can also be gripped in the middle,
to tilt them at an angle and shake them cyclically over struts. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass zwei Hohlfaser- Membranbündel übereinander angeordnet und an ihrer Verbindungsstelle gefasst werden, um sie um einen Winkel schräg zu stellen und über Verstrebungen zyklisch zu schütteln.2. The method according to claim 1, characterized in that two hollow fiber Membrane bundles arranged one above the other and held at their junction to be inclined at an angle and cyclically over struts to shake. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass mehrere Hohlfasermembranbündel gitterförmig gefasst werden und dieses Gitter geschüttelt wird.3. The method according to claim 1 or 2, characterized in that several Hollow fiber membrane bundles are gridded and shaken this grid becomes. 4. Verfahren nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass es sich bei den Verstrebungen um Rohre oder Schläuche handelt, durch die Rückspülungsflüssigkeit gepresst wird.4. The method according to any one of the preceding claims, characterized in that it the struts are pipes or hoses through which Backflushing liquid is pressed. 5. Verfahren nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Hohlfaser-Membranen synchron zur Schüttelbewegung impulsförmig hydraulisch angeströmt werden.5. The method according to any one of the preceding claims, characterized in that the Hollow fiber membranes, synchronous to the shaking movement, pulsed hydraulically be flown to. 6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, dass zur Erzeugung des hydraulischen Impulses mittels Pressluft unterhalb der Hohlfaser-Membranen eine große Luftblase erzeugt wird. 6. The method according to claim 5, characterized in that for generating the hydraulic impulse using compressed air below the hollow fiber membranes large air bubble is generated.   7. Verfahren nach Anspruch 5, dadurch gekennzeichnet, dass zur Erzeugung des hydraulischen Impulses eine unterhalb der Hohlfaser-Membranen angeordnete Kolben- oder Membranpumpe verwendet wird.7. The method according to claim 5, characterized in that for generating the hydraulic pulse one arranged below the hollow fiber membranes Piston or diaphragm pump is used. 8. Vorrichtung zur mechanischen Beseitigung von Ablagerungen auf der Aussenoberfläche von außen nach innen durchströmten Hohlfaser-Membranen, dadurch gekennzeichnet, dass
die Hohlfasern gebündelt,
an ihren gegenüberliegenden Enden senkrecht übereinander befestigt und
zusätzlich in ihrer Mitte gefasst sind,
um sie um einen Winkel schräg stellen und über Verstrebungen zyklisch schütteln zu können.8. Device for the mechanical removal of deposits on the outer surface from the outside inward flow through hollow fiber membranes, characterized in that
the hollow fibers are bundled,
fastened vertically one above the other at their opposite ends and
are also set in the middle,
to be able to tilt them at an angle and to shake them cyclically over struts. 9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass zwei Hohlfaser- Membranbündel übereinander angeordnet und über die mittige Befestigung miteinander verbunden sind.9. The device according to claim 8, characterized in that two hollow fiber Membrane bundles arranged one above the other and over the central fastening are interconnected. 10. Vorrichtung nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass es sich bei den Verstrebungen um Rohre oder Schläuche handelt, durch die Rückspülungsflüssigkeit pressbar ist.10. The device according to claim 8 or 9, characterized in that it is in the Braces are pipes or hoses through the backwash liquid can be pressed. 11. Vorrichtung nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, dass mehrere Hohlfasermembranbündel gitterförmig gefasst sind.11. The device according to one of claims 8 to 10, characterized in that several hollow fiber membrane bundles are lattice-shaped. 12. Vorrichtung nach einem der Ansprüche 8 bis 11, dadurch gekennzeichnet, dass zur Erzeugung eines hydraulischen Impulses unterhalb der Hohlfaser-Membranen eine Kolben- oder Membranpumpe angeordnet ist.12. Device according to one of claims 8 to 11, characterized in that for Generation of a hydraulic pulse beneath the hollow fiber membranes Piston or diaphragm pump is arranged.
DE2002109170 2002-03-01 2002-03-01 Mechanically cleaning hollow fiber membranes comprises forming hollow fibers into bundles, vertically joining together on their opposite-lying ends, and grasping in center to set at angle Expired - Fee Related DE10209170C1 (en)

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Cited By (31)

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WO2006074519A1 (en) 2005-01-14 2006-07-20 Siemens Water Technologies Corp. Filtration system
EP1701778A1 (en) * 2003-10-07 2006-09-20 Phase Inc. Cleaning hollow core membrane fibers using vibration
US8182687B2 (en) 2002-06-18 2012-05-22 Siemens Industry, Inc. Methods of minimising the effect of integrity loss in hollow fibre membrane modules
US8268176B2 (en) 2003-08-29 2012-09-18 Siemens Industry, Inc. Backwash
US8287743B2 (en) 2007-05-29 2012-10-16 Siemens Industry, Inc. Membrane cleaning with pulsed airlift pump
US8293098B2 (en) 2006-10-24 2012-10-23 Siemens Industry, Inc. Infiltration/inflow control for membrane bioreactor
US8318028B2 (en) 2007-04-02 2012-11-27 Siemens Industry, Inc. Infiltration/inflow control for membrane bioreactor
US8377305B2 (en) 2004-09-15 2013-02-19 Siemens Industry, Inc. Continuously variable aeration
US8382981B2 (en) 2008-07-24 2013-02-26 Siemens Industry, Inc. Frame system for membrane filtration modules
US8496828B2 (en) 2004-12-24 2013-07-30 Siemens Industry, Inc. Cleaning in membrane filtration systems
US8506806B2 (en) 2004-09-14 2013-08-13 Siemens Industry, Inc. Methods and apparatus for removing solids from a membrane module
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US8518256B2 (en) 2001-04-04 2013-08-27 Siemens Industry, Inc. Membrane module
US8758621B2 (en) 2004-03-26 2014-06-24 Evoqua Water Technologies Llc Process and apparatus for purifying impure water using microfiltration or ultrafiltration in combination with reverse osmosis
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US8956464B2 (en) 2009-06-11 2015-02-17 Evoqua Water Technologies Llc Method of cleaning membranes
US9022224B2 (en) 2010-09-24 2015-05-05 Evoqua Water Technologies Llc Fluid control manifold for membrane filtration system
US9533261B2 (en) 2012-06-28 2017-01-03 Evoqua Water Technologies Llc Potting method
US9604166B2 (en) 2011-09-30 2017-03-28 Evoqua Water Technologies Llc Manifold arrangement
US9675938B2 (en) 2005-04-29 2017-06-13 Evoqua Water Technologies Llc Chemical clean for membrane filter
US9764289B2 (en) 2012-09-26 2017-09-19 Evoqua Water Technologies Llc Membrane securement device
US9764288B2 (en) 2007-04-04 2017-09-19 Evoqua Water Technologies Llc Membrane module protection
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US9962865B2 (en) 2012-09-26 2018-05-08 Evoqua Water Technologies Llc Membrane potting methods
US10322375B2 (en) 2015-07-14 2019-06-18 Evoqua Water Technologies Llc Aeration device for filtration system
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Cited By (49)

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Publication number Priority date Publication date Assignee Title
US8518256B2 (en) 2001-04-04 2013-08-27 Siemens Industry, Inc. Membrane module
US8512568B2 (en) 2001-08-09 2013-08-20 Siemens Industry, Inc. Method of cleaning membrane modules
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US8894858B1 (en) 2005-08-22 2014-11-25 Evoqua Water Technologies Llc Method and assembly for water filtration using a tube manifold to minimize backwash
US8858796B2 (en) 2005-08-22 2014-10-14 Evoqua Water Technologies Llc Assembly for water filtration using a tube manifold to minimise backwash
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US8623202B2 (en) 2007-04-02 2014-01-07 Siemens Water Technologies Llc Infiltration/inflow control for membrane bioreactor
US9764288B2 (en) 2007-04-04 2017-09-19 Evoqua Water Technologies Llc Membrane module protection
US8840783B2 (en) 2007-05-29 2014-09-23 Evoqua Water Technologies Llc Water treatment membrane cleaning with pulsed airlift pump
US10507431B2 (en) 2007-05-29 2019-12-17 Evoqua Water Technologies Llc Membrane cleaning with pulsed airlift pump
US8287743B2 (en) 2007-05-29 2012-10-16 Siemens Industry, Inc. Membrane cleaning with pulsed airlift pump
US8622222B2 (en) 2007-05-29 2014-01-07 Siemens Water Technologies Llc Membrane cleaning with pulsed airlift pump
US8372276B2 (en) 2007-05-29 2013-02-12 Siemens Industry, Inc. Membrane cleaning with pulsed airlift pump
US9573824B2 (en) 2007-05-29 2017-02-21 Evoqua Water Technologies Llc Membrane cleaning with pulsed airlift pump
US9206057B2 (en) 2007-05-29 2015-12-08 Evoqua Water Technologies Llc Membrane cleaning with pulsed airlift pump
US9023206B2 (en) 2008-07-24 2015-05-05 Evoqua Water Technologies Llc Frame system for membrane filtration modules
US8382981B2 (en) 2008-07-24 2013-02-26 Siemens Industry, Inc. Frame system for membrane filtration modules
US8956464B2 (en) 2009-06-11 2015-02-17 Evoqua Water Technologies Llc Method of cleaning membranes
US10441920B2 (en) 2010-04-30 2019-10-15 Evoqua Water Technologies Llc Fluid flow distribution device
US9914097B2 (en) 2010-04-30 2018-03-13 Evoqua Water Technologies Llc Fluid flow distribution device
US9022224B2 (en) 2010-09-24 2015-05-05 Evoqua Water Technologies Llc Fluid control manifold for membrane filtration system
US9630147B2 (en) 2010-09-24 2017-04-25 Evoqua Water Technologies Llc Fluid control manifold for membrane filtration system
US10391432B2 (en) 2011-09-30 2019-08-27 Evoqua Water Technologies Llc Manifold arrangement
US9925499B2 (en) 2011-09-30 2018-03-27 Evoqua Water Technologies Llc Isolation valve with seal for end cap of a filtration system
US9604166B2 (en) 2011-09-30 2017-03-28 Evoqua Water Technologies Llc Manifold arrangement
US11065569B2 (en) 2011-09-30 2021-07-20 Rohm And Haas Electronic Materials Singapore Pte. Ltd. Manifold arrangement
US9533261B2 (en) 2012-06-28 2017-01-03 Evoqua Water Technologies Llc Potting method
US9962865B2 (en) 2012-09-26 2018-05-08 Evoqua Water Technologies Llc Membrane potting methods
US9764289B2 (en) 2012-09-26 2017-09-19 Evoqua Water Technologies Llc Membrane securement device
US9815027B2 (en) 2012-09-27 2017-11-14 Evoqua Water Technologies Llc Gas scouring apparatus for immersed membranes
US10427102B2 (en) 2013-10-02 2019-10-01 Evoqua Water Technologies Llc Method and device for repairing a membrane filtration module
US11173453B2 (en) 2013-10-02 2021-11-16 Rohm And Haas Electronic Materials Singapores Method and device for repairing a membrane filtration module
US10322375B2 (en) 2015-07-14 2019-06-18 Evoqua Water Technologies Llc Aeration device for filtration system

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