EP1490163A1 - Dispositif de filtration a flux transversal et procede de fonctionnement associe - Google Patents

Dispositif de filtration a flux transversal et procede de fonctionnement associe

Info

Publication number
EP1490163A1
EP1490163A1 EP03745239A EP03745239A EP1490163A1 EP 1490163 A1 EP1490163 A1 EP 1490163A1 EP 03745239 A EP03745239 A EP 03745239A EP 03745239 A EP03745239 A EP 03745239A EP 1490163 A1 EP1490163 A1 EP 1490163A1
Authority
EP
European Patent Office
Prior art keywords
filter element
valve
shut
line
compressed air
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.)
Withdrawn
Application number
EP03745239A
Other languages
German (de)
English (en)
Inventor
Eduard Hartmann
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.)
Bucher Guyer AG
Original Assignee
Bucher Guyer 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 Bucher Guyer AG filed Critical Bucher Guyer AG
Publication of EP1490163A1 publication Critical patent/EP1490163A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
    • A23L2/70—Clarifying or fining of non-alcoholic beverages; Removing unwanted matter
    • A23L2/72—Clarifying or fining of non-alcoholic beverages; Removing unwanted matter by filtration
    • A23L2/74—Clarifying or fining of non-alcoholic beverages; Removing unwanted matter by filtration using membranes, e.g. osmosis, ultrafiltration
    • 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
    • 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
    • B01D61/18—Apparatus therefor
    • 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
    • B01D61/22—Controlling or regulating
    • 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
    • B01D2321/04—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
    • B01D2321/18—Use of gases
    • B01D2321/185—Aeration

Definitions

  • the invention relates to a cross-flow filtration system of the type mentioned in the preamble of claim 1 and to a method for its operation according to the preamble of claim 8.
  • Such cross-flow filtration systems are used advantageously when it comes to molecularly disperse or colloidally disperse substance mixtures, at most with proportions of solid or To filter suspended solids.
  • mixtures of substances are mixtures of substances which initially arise in the production of fruit and fruit juices. These mixtures of substances are then separated by filtration into clear fruit or fruit juice on the one hand and the essentially remaining turbid substances on the other.
  • activated carbon can also be added to the mixture of substances before the filtration in order to achieve certain effects. This activated carbon must then also be separated from the liquid with the cloudy substances.
  • a cross-flow filtration system of the type mentioned in the preamble of claim 1 is known from WO-A 1-01 / 51186.
  • a solution is shown here how blockages of the filtration module can be removed by fixed retentate portions.
  • the problem with systems of this type is that the filter elements can become blocked, so that production has to be interrupted in order to first remove the blockages. Production interruptions are undesirable.
  • JP-A-06 226 065. A method for cleaning membrane filters is known from JP-A-06 226 065. The cleaning is done by backwashing with the use of air. A similar method is described in JP-A-06 023 246.
  • gas for example air
  • WO-Al-00/29099 it is known that gas, for example air, is introduced into the device in a device for membrane filtration in the course of cleaning steps.
  • the filter elements of such crossflow filtration systems are often composed of several membrane tubes arranged parallel to one another. This is known for example from WO-Al -98/19778. Such a system therefore consists of several modules. The lifespan of such modules is finite. That is why
  • the invention has for its object to provide a cross-flow filtration system and a method for its operation, through which maintenance work can be carried out more easily. According to the invention, the stated object is achieved by the features of claims 1 and 8. Advantageous further developments result from the dependent claims.
  • FIG. 1 is a schematic of a cross-flow filtration system
  • Fig. 3 shows another embodiment.
  • 1 means a filter element in which the desired liquid phase is separated from the mixture of substances.
  • the design of the filter element 1 is not important. The invention is primarily used when the filter element 1 contains, for example, straight or wound tubular membranes or capillary tubes, since such filter elements 1 mostly process substance mixtures with high turbidities. If parts of the filter element 1 become blocked, this regularly leads to an interruption in operation with all its disadvantageous consequences.
  • the mixture of substances to be filtered is located in a product tank 2. From there it passes through a feed line 3 to the filter element 1.
  • a feed pump 4 and a flow meter 5 are inserted into the feed line 3, the speed of the feed pump 4 through the flow meter 5 in the manner It can be controlled or regulated that either the delivery rate through the feed line 3 or the pressure in the feed line 3 at the input of the filter element 1 remains constant. This enables economical production in a known manner.
  • a tank shut-off valve 6 which can be actuated by a motor or pneumatically.
  • a permeate line 7 is connected to it, through which the permeate separated off in the filter element 1, for example the clear fruit juice, can be removed.
  • a return line 8 leads from the filter element 1 to the product tank 2, in which the retentate is returned from the filter element 1 to the product tank 2.
  • a throttle valve 9 is inserted, which can also be actuated by a motor or pneumatically.
  • This throttle valve 9 can be controlled by a retentate line pressure sensor 10, which detects the pressure at the retentate inlet of the filter element 1.
  • a further retentate line pressure sensor 10 ′ can be arranged on the return line 8 directly behind the filter element 1.
  • the pressure in the supply line 3 which can be detected by the retentate line pressure sensor 10 directly in front of the filter element 1 is related to the delivery capacity of the feed pump 4 and the state of the filter element 1.
  • An increase in viscosity can be caused, for example, by an increased proportion of solids or suspended matter in the mixture of substances.
  • the throttle valve 9 can now be opened or closed more or less by motor or pneumatically. Before the return line 8 flows into the product tank 2 there is a
  • the mixture of substances in the product tank 2 is conveyed to the filter element 1 with the aid of the feed pump 4 when the tank shut-off valve 6 is open. Permeate is separated from the mixture of substances in filter element 1.
  • the retentate is returned to the product tank 2 through the return line 8 with the return line shut-off valve 11 open.
  • the viscosity of the circulating mixture of substances increases in the course of the filtration process, because the proportion of solid or suspended substances in the mixture of substances increases the more permeate has been separated in filter element 1.
  • the filtration performance drops. Has the
  • the mixture of substances to be filtered is first fed to the product tank 2 via a product line 13.
  • the feed pump 4 then goes into operation. Initially, the mixture of substances contained in the product tank 2 is relative low viscosity.
  • the feed pump 4 is controlled so that the delivery rate through the feed line 3 remains constant.
  • Permeate is separated off in the filter element 1, so that the retentate leaving the filter element 1 has a higher viscosity. This retentate is returned to the product tank 2. Its amount is smaller because of the deposition of permeate in the filter element 1.
  • 13 additional substance mixture is fed through the product line. As the process progresses, the viscosity of the mixture of substances in the product tank 2 increases further and further.
  • a rinse water tank 14 is provided, from which rinse water can be fed into the feed line 3 through a rinse line 15.
  • a flush line shut-off valve 16 is inserted. Between the rinse water tank 14 and the rinse shut-off valve 16 there is another element, the task of which is to prevent significant amounts of the substance mixture from flowing back from the feed line 3 to the rinse water tank 14 when the rinse water shut-off valve 16 is opened.
  • the tank shut-off valve 6 is closed more or less simultaneously and the flushing shut-off valve 16 is opened.
  • the tank shut-off valve 6 and the flushing line shut-off valve 16 are actuated by a control unit 20, with which the filtration process can be controlled.
  • This element preventing the mixture reflux is either a check valve 17 or a reflux throttle 17 ', as is known from the Swiss patent application 0204/02.
  • a ventilation valve 23 is advantageously provided, which serves as a vacuum breaker and can be designed as a check valve.
  • a compressed air line 25 opens into the feed line 3 to the filter element 1 and can be shut off by a compressed air shut-off valve 26.
  • a compressed air shut-off valve 26 By opening the compressed air shut-off valve 26, the flushing water located in the filter element 1 is displaced from the filter element 1 by means of compressed air. This ensures that the weight of the filter element 1 is significantly lower, so that the filter element 1 is much easier to handle. It can now be disassembled to replace individual parts of the filter element 1. Since there is no rinsing water in filter element 1 such maintenance work is also much easier because the maintenance personnel are not hindered by escaping rinse water.
  • the outlet valve 12 known from the Swiss patent application 0204/02 is advantageously arranged immediately behind or directly on the filter element 1, which is indicated in FIG. 1 by dashed lines.
  • the compressed air line 25 advantageously has a memory 27. This means that a sufficient amount of compressed air is available in the immediate vicinity of the cross-flow filtration system. In fact, there is often the problem that compressed air lines which are in operation do not have a large cross section and are relatively long. This memory 27 is advantageous in order to guarantee that the filter element 1 is blown out completely and quickly.
  • the size of the store 27 depends on the circumstances of the cross-flow filtration system, namely in particular on the dimensions of the filter element 1.
  • a hot air line 29, in which a hot air shut-off valve 30 is arranged can advantageously also be present parallel to the compressed air line 25.
  • the filter element 1 can then be dried by means of dry warm air. Drying the filter element 1 can be advantageous if the cross-flow filtration system is to be shut down for some time.
  • an inert gas line 31, which is likewise arranged parallel to the compressed air line 25 and can be shut off from the filter element 1 by means of an inert gas shut-off valve 32, can also advantageously be arranged.
  • the filter element 1 can be flooded with inert gas, for example nitrogen. This prevents any residues remaining in the filter element 1 oxidize organic substances and / or microbial growth occurs. The filter element 1 is thus preserved.
  • control lines leading from the control unit 20 to the compressed air shutoff valve 26, to the supply line shutoff valve 28, to the warm air shutoff valve 30 and to the inert gas shutoff valve 32 are not shown.
  • the control unit 20 closes the supply line shutoff valve 28 and opens the compressed air shutoff valve 26 as well as the outlet valve 12. This ensures that the filter element 1 is flowed through by compressed air. If the filter element 1 contains a plurality of membrane tubes arranged parallel to one another, the flushing water is displaced from all membrane tubes approximately simultaneously. Since such membrane tubes usually have an inner diameter of no more than 6 mm, the flushing water is displaced more or less completely. The air does not pass through the membrane tubes in the form of air bubbles, but pushes the water / compressed air boundary line in front of it.
  • the compressed air advantageously has a pressure of at least 3 bar.
  • the upper limit for the pressure is given by the load limit for the membrane tubes.
  • both the supply line shutoff valve 28 and the outlet valve 12 are closed before the compressed air shutoff valve 26 is opened. Because the return line shut-off valve 11 is also closed, a pressure is built up by opening the compressed air shut-off valve 28 inside the filter element 1 and in the lines and line parts leading to the filter element 1.
  • the filter element 1 thus acts together with the lines and line parts as a pressure accumulator. The flushing water residues are moved somewhat by the incoming compressed air, but are not yet displaced from the filter element 1. Only when the desired pressure has been reached in the filter element 1 and in the lines and line parts leading to the filter element 1, the outlet valve 12 quickly opened completely.
  • another compressed gas can be used instead of the compressed air, for example nitrogen, which can be removed from a high pressure bottle, as is advantageous according to a further embodiment, which will be described later.
  • a second process step can now advantageously be carried out, namely drying the filter element 1.
  • the hot air shut-off valve 30 is opened. Now dry warm air flows through it Filter element 1 and dries it from the inside.
  • the duration of this process step depends on the dimensions of the filter element 1. It can be up to an hour.
  • a third process step can now be advantageous be performed.
  • the inert gas shut-off valve 32 is now opened.
  • the inert gas for example nitrogen, can thus flow through the filter element 1.
  • the inert gas shut-off valve 32 and also the outlet valve 12 are closed again. This inert gas is now in the filter element 1 and the cross-flow filtration system can be shut down.
  • the inert gas is available, for example, in the form of a high-pressure bottle.
  • the pressure of the inert gas in the filter element is maintained by a pressure regulator.
  • FIG. 2a and 2b show an embodiment for a filter element 1 together with other essential elements.
  • FIG. 2a shows a frontal view
  • FIG. 2b shows a side view.
  • the filter element 1 consists of a trough 40 in which a multiplicity of filter modules 41 are arranged one behind the other and thus also parallel to one another.
  • Such disk-shaped filter modules 41 are known, for example, from WO-Al-98/19778.
  • Each of the filter modules 41 is connected on the one hand to a ring line 42 connected to the feed line 3 (FIG. 1) and on the other hand to the return line 8.
  • the permeate collects in the trough 40.
  • the outlet valve 12 used to drain the retentate is also shown here.
  • FIG. 2 b In the side view of FIG. 2 b it can be seen how the feed line 3 opens into the ring line 42.
  • This junction is advantageously designed as an injector, with the result that a flow of material is forced in the ring line 42 in the direction indicated by an arrow. This is particularly advantageous if the retentate is fhixotropic.
  • the outlets to the individual filter modules 41 are designated by the reference number 43.
  • the drain line 22, which can be shut off by means of the drain valve 21, opens into the lower region of the ring line 42.
  • the connection for the ventilation valve 23 is located in the upper area of the ring line 42.
  • the compressed air line 25, which can be shut off by means of the compressed air shut-off valve 26, also opens into the upper area of the ring line 42.
  • outlet valve 12 (FIG. 2a) is then opened, the pressure can decrease via this outlet valve 12.
  • the compressed air in the ring line 42 can now relax and pushes the flushing water in the filter modules 41 in front of it, so that the flushing water exits through the outlet valve 12.
  • the rinsing water is then displaced from the filter element 1.
  • FIG. 3 Another type of filter element 1 is shown in FIG. 3. This consists of a number of filter modules 41, which are designed as linear modules, as is also known. The individual filter modules 41 are connected to one another by pipe elbows 45. So they are connected in series.
  • the feed line 3 can be shut off by the feed line shut-off valve 28.
  • the drain line 22 with the drain valve 21 opens between the supply line shut-off valve 28 and the filter element 1.
  • the ventilation valve 23 is located at the top here return line 8 lying behind the filter element 1 and also the compressed air line 25 with the compressed air shut-off valve 26 opens here.
  • the return line shut-off valve 11 and the outlet valve 12 are also shown.
  • the return line 8 is relatively long here and has a larger diameter.
  • the drain valve 21 is closed. Then the compressed air shut-off valve 26 is opened. Now a pressure builds up in the filter element 1, but also in the return line 8 between the filter element 1 and the return line shut-off valve 11 or the outlet valve 12. Here, the large-volume part of the return line 8 now acts as a store. If the drain valve 21 is then opened, the compressed air relaxes and displaces the remains of the rinsing water which are still in the storage element 1.
  • the confluence of the compressed air line 25 at the filter element 1 is therefore different depending on the design of the crossflow filtration system.
  • 1 and 2b show that the compressed air line 25 opens on the filter element 1 on the input side, while in the embodiment of FIG. 3 it opens on the filter element 1 on the output side. This can also apply analogously to the hot air line 29 and the inert gas line 31.

Landscapes

  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Nutrition Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

L'invention concerne un dispositif de filtration à flux transversal comprenant au moins un élément filtrant (1), auquel une conduite d'alimentation (3) apporte un mélange de matière à partir d'un réservoir de produit (2). De l'eau de rinçage peut également être amenée à l'élément filtrant (1) à partir d'un réservoir d'eau de rinçage (14). Selon l'invention, un robinet d'arrêt (28) de la conduite d'alimentation se trouve en amont de l'entrée de ladite conduite d'alimentation (3) dans l'élément filtrant (1), dans lequel débouche aussi une conduite d'air comprimé (25), laquelle peut être fermée par un robinet d'arrêt d'air comprimé (26). L'élément filtrant (1) étant rincé, l'eau de rinçage qui s'y trouve est évacuée par l'air comprimé. Ainsi, l'élément filtrant (1) est de manipulation plus aisée pour la réalisation des travaux de maintenance.
EP03745239A 2002-04-03 2003-03-25 Dispositif de filtration a flux transversal et procede de fonctionnement associe Withdrawn EP1490163A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH5532002 2002-04-03
CH553022002 2002-04-03
PCT/CH2003/000194 WO2003082449A1 (fr) 2002-04-03 2003-03-25 Dispositif de filtration a flux transversal et procede de fonctionnement associe

Publications (1)

Publication Number Publication Date
EP1490163A1 true EP1490163A1 (fr) 2004-12-29

Family

ID=28458264

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03745239A Withdrawn EP1490163A1 (fr) 2002-04-03 2003-03-25 Dispositif de filtration a flux transversal et procede de fonctionnement associe

Country Status (4)

Country Link
EP (1) EP1490163A1 (fr)
AU (1) AU2003209917A1 (fr)
PL (1) PL370984A1 (fr)
WO (1) WO2003082449A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104190126B (zh) * 2014-09-12 2015-11-18 中冶北方（大连）工程技术有限公司 用于压滤工艺及其控制的系统
CN106621822B (zh) * 2016-12-28 2019-04-16 天邦膜技术国家工程研究中心有限责任公司 一种中空纤维气体分离膜组件的清洗装置及方法
DE102021103430A1 (de) * 2020-04-15 2021-10-21 Krones Aktiengesellschaft Vorrichtung und Verfahren zum Filtrieren von Bier

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0623246A (ja) * 1992-07-07 1994-02-01 Hitachi Plant Eng & Constr Co Ltd 膜の洗浄方法
JPH06226065A (ja) * 1993-02-01 1994-08-16 Hitachi Plant Eng & Constr Co Ltd 膜洗浄方法
NL1010544C2 (nl) * 1998-11-13 2000-05-16 Stork Friesland Bv Werkwijze en inrichting voor het met behulp van membraanfiltratie uit een vloeistof verwijderen van zwevende stoffen en zouten.
WO2001051186A1 (fr) * 2000-01-13 2001-07-19 Bucher-Guyer Ag Procede et dispositif pour liberer des chemins d'ecoulement dans des modules de filtration

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03082449A1 *

Also Published As

Publication number Publication date
WO2003082449A1 (fr) 2003-10-09
AU2003209917A1 (en) 2003-10-13
PL370984A1 (en) 2005-06-13

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