WO2009076980A1 - Dispositif de filtrage et procédé d'exploitation d'un dispositif de filtrage - Google Patents

Dispositif de filtrage et procédé d'exploitation d'un dispositif de filtrage Download PDF

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Publication number
WO2009076980A1
WO2009076980A1 PCT/EP2007/011029 EP2007011029W WO2009076980A1 WO 2009076980 A1 WO2009076980 A1 WO 2009076980A1 EP 2007011029 W EP2007011029 W EP 2007011029W WO 2009076980 A1 WO2009076980 A1 WO 2009076980A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
filter device
flow
pressure
elements
Prior art date
Application number
PCT/EP2007/011029
Other languages
German (de)
English (en)
Inventor
Dieter Scherer
Johannes Feller
Original Assignee
Kmpt 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 Kmpt Ag filed Critical Kmpt Ag
Priority to PCT/EP2007/011029 priority Critical patent/WO2009076980A1/fr
Publication of WO2009076980A1 publication Critical patent/WO2009076980A1/fr

Links

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
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/15—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces
    • B01D33/21—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces with hollow filtering discs transversely mounted on a hollow rotary shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/35—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition
    • B01D33/37—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition in parallel connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/35—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition
    • B01D33/41—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition in series connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/58—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element
    • B01D33/68—Retarding cake deposition on the filter during the filtration period, e.g. using stirrers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/80—Accessories
    • B01D33/804—Accessories integrally combined with devices for controlling the filtration
    • B01D33/808—Accessories integrally combined with devices for controlling the filtration by pressure measuring
    • 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
    • B01D65/10—Testing of membranes or membrane apparatus; Detecting or repairing leaks
    • B01D65/102—Detection of leaks in membranes
    • 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
    • B01D65/10—Testing of membranes or membrane apparatus; Detecting or repairing leaks
    • B01D65/104—Detection of leaks in membrane apparatus or modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2311/00—Details relating to membrane separation process operations and control
    • B01D2311/14—Pressure control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2311/00—Details relating to membrane separation process operations and control
    • B01D2311/16—Flow or flux control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2315/00—Details relating to the membrane module operation
    • B01D2315/02—Rotation or turning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2317/00—Membrane module arrangements within a plant or an apparatus
    • B01D2317/02—Elements in series
    • B01D2317/027—Christmas tree arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2317/00—Membrane module arrangements within a plant or an apparatus
    • B01D2317/04—Elements in parallel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2319/00—Membrane assemblies within one housing
    • B01D2319/04—Elements in parallel

Definitions

  • a newer technique for filtering various materials is the so-called dynamic cross-flow filtering.
  • hollow filter elements are used in the form of plates that are movable relative to each other and separated by a gap. The relative movement of the elements causes turbulence in the medium to be filtered, whereby the surface of the filter elements is cleaned.
  • Such a filter device is described, for example, in WO 00/47312.
  • DE-OS 1 536 915 describes a shut-off device for individual filter plates in rotatable disc filters, wherein it is mentioned that contaminated filtrate enters the filtrate at a fraction of the filter fabric, which can be observed through a sight glass in the Filtrat- line, thus a shutdown can be initiated.
  • the filtrate is already contaminated, and this device requires continuous human surveillance.
  • the invention is thus based on the object, in particular in these filter elements, but also in other filtration techniques, to detect a beginning damage to the filter device as quickly as possible.
  • the beginning of breakage of the filter element is manifested, for example, in a rapid drop in pressure in the medium to be filtered in front of the filter element, upstream of the filter element, or in a rapid increase in pressure downstream of the filter element, d. H. downstream of the filter element.
  • the most reliable way to detect the incipient breakage is by monitoring the difference between the pressures before and after the filter element (transmembrane pressure), as this compensates for external influences from feed pumps, etc.
  • the inventor has recognized that it is also possible, the disc break even in the initial phase via a likewise abrupt increase in the outflow from the filter element, i. the flow through the drain, which is likely to be a direct consequence of the pressure changes.
  • Flow monitoring can be used as an alternative to pressure monitoring or in addition to pressure monitoring, which increases the safety of the monitoring system.
  • filter elements If a plurality of filter elements are provided, individual filter elements or groups of filter elements can be monitored, and the outflows from the individual filter elements or groups of filter elements can be interrupted separately.
  • the movement is preferably stopped when the breakage is detected.
  • an endangered area can thus be isolated such that neither on the filtrate side (permeate side) a beginning breakdown of unfiltered medium (suspension) and / or fragments of the filter disk contaminate the already filtered permeate can still contaminate the entire suspension on the suspension side fragments and the filter apparatus to protect the discs is switched off immediately.
  • Fig. 1 is a schematic representation of a single-stage filter device
  • Fig. 2 is a multi-stage system
  • a filter device comprises a delivery tank 1, to which, as indicated by an arrow 3, a suspension to be filtered is supplied. From the feed tank 1 suspension is conveyed by means of a feed pump 5 in a filter circuit 7.
  • the filter circuit 7 comprises, in addition to pipes, a cooling unit 13 and a circulation pump 11 in order to circulate the suspension in the filter circuit.
  • the core of the filter circuit is a filter device 9 in the design of a dynamic cross-flow filter device.
  • Filter elements 15 in the form of hollow discs are accommodated in a container 19 in the filter device.
  • the filter elements are mounted on hollow shafts 17 which are driven by a motor 21.
  • the filter elements are arranged in a toothed arrangement so that turbulences are created in an overlapping region between the filter elements, which cleanse the filter elements.
  • the suspension in the container 19 is filtered by the filter elements 15, and the filtered permeate enters through the filter elements in the hollow shafts 17 and is supplied via pipes to a permeate 23 and derived for further use, as indicated by an arrow 25. Further, a backwash pump 27 is provided, with the permeate from the container 23, if necessary, the filter device 9 can be returned, with a direct connection between the permeate 13 and the filter device 9 is closed by a valve 29.
  • the suspension which has been enriched by circulating in the cooling circuit 7 in the filter device 9, is discharged from the suspension circuit through pipes, not shown.
  • valves 31 and 33 are also provided for blocking the supply of suspension to the filter device 9 and the removal of suspension.
  • the pressure inside the filter device 9 is detected by a pressure sensor 35, and the pressure in the piping for purging the permeate from the filter device 9 is detected by a pressure sensor 37.
  • the pressures detected by the sensors 35 and 37, respectively are continuously monitored, and if the pressure difference suddenly drops, the valves 33, 31 and 39 are closed because this drop indicates a start of a disk break.
  • the operation of the motor 21 and the feed pumps 5 and 11 are also interrupted.
  • Fig. 1 further shows a flow meter 61 on the piping for discharging the permeate and a flow meter 67 in the piping for supplying the suspension.
  • These flow meters continuously monitor the flow through the corresponding pipeline, in which case the controller monitors the flow meters and, in the event of a sudden increase in flow, closes the valves 31, 33 and 39 as described above.
  • a filling level meter 63 is provided, which detects the fill level in the permeate container 23.
  • a sudden increase in the outflow from the filter element also leads to a sudden increase in the level in the permeate tank 23.
  • a starting disc break can also be detected, in which case the valves in the same way be closed as described above.
  • This measure can also be taken alternatively or, in order to increase the redundancy, in addition to the measures mentioned above.
  • FIG. 2 shows a multi-stage filter system in which a plurality of the filter devices 9 already described are connected in series.
  • suspension is fed to three filter devices 9 of the same structure, as indicated by the arrow 41.
  • Two filter devices 9 are arranged downstream of the three first stage filter devices and receive suspension from one or two of the upstream filter devices.
  • Suspension from the second stage filtering devices is finally fed to a third stage filtering device from which enriched suspension is removed, as indicated by an arrow 43.
  • the permeate is discharged separately from each of the filter devices into a common permeate container (not shown).
  • Each of the filter devices comprises the already mentioned pressure sensors 37 and 35, and each of the filter devices is provided with separate shut-off devices in the form of valves 45, 47. Furthermore, each filter device comprises a feed pump 51.
  • each of the filter device is monitored separately with respect to the pressure curve and can be isolated if necessary by closing the shut-off elements 45, 47 in the multi-stage system.
  • the respective associated feed pump 51 is turned off.

Abstract

L'invention concerne un dispositif de filtrage comprenant des éléments filtrants (15), de préférence sous la forme de plaques filtrantes mobiles, notamment un dispositif de filtrage à courant transversal. La conduite d'arrivée vers les éléments filtrants (15) contient des éléments de fermeture (31, 33) et la conduite destinée à évacuer le filtrat des éléments filtrants contient un élément de fermeture (39). Pour pouvoir détecter l'amorçage d'une détérioration des éléments filtrants (15), des capteurs de pression (35, 37) qui sont continuellement surveillés par un dispositif de commande sont disposés dans la zone avant et/ou après les éléments filtrants (15). En cas de variation brutale de la pression ou de la différence de pression détectée, les éléments de fermeture (31, 33, 39) sont déclenchés pour fermer la circulation à travers le dispositif de filtrage. En complément ou en variante, il est possible d'installer des débitmètres (61, 67) dans la conduite d'arrivée vers les éléments filtrants (15) ou dans la conduite d'évacuation depuis les éléments filtrants (15), dans quel cas les éléments de fermeture (31, 33, 39) étant déclenchés par une augmentation brutale de la pression. En complément ou en variante également, le niveau dans un réservoir collecteur (23) peut être surveillé au moyen d'un mesureur de niveau (63) ou alors le niveau dans un réservoir (1) peut être surveillé par un autre mesureur de niveau, de sorte qu'une modification brutale du niveau correspondant puisse provoquer un déclenchement des éléments de fermeture. Les dispositions selon l'invention permettent d'éviter que des fragments pénètrent dans le circuit de suspension et dans l'évacuation du filtrat en cas de rupture d'un élément filtrant (15) ou alors que du filtrat non purifié parvienne dans l'évacuation du filtrat.
PCT/EP2007/011029 2007-12-14 2007-12-14 Dispositif de filtrage et procédé d'exploitation d'un dispositif de filtrage WO2009076980A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/011029 WO2009076980A1 (fr) 2007-12-14 2007-12-14 Dispositif de filtrage et procédé d'exploitation d'un dispositif de filtrage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/011029 WO2009076980A1 (fr) 2007-12-14 2007-12-14 Dispositif de filtrage et procédé d'exploitation d'un dispositif de filtrage

Publications (1)

Publication Number Publication Date
WO2009076980A1 true WO2009076980A1 (fr) 2009-06-25

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011033537A1 (fr) * 2009-09-18 2011-03-24 Tmci Padovan S.P.A. Appareil et méthode de filtrage de liquides, en particulier de liquides organiques
WO2012060778A1 (fr) * 2010-11-01 2012-05-10 Nanyang Technological University Capteur à membrane et procédé de détection d'encrassement dans un fluide
FR2973718A1 (fr) * 2011-04-06 2012-10-12 Degremont Dispositif et procede pour tester des modules de filtration membranaires, en particulier des modules d'ultrafiltration, de microfiltration ou d'osmose inverse
WO2018197757A1 (fr) 2017-04-28 2018-11-01 Valmet Technologies Oy Système, agencement et procédé de détection de détériorations à l'aide de filtres à disques continus
CN109603321A (zh) * 2018-08-21 2019-04-12 华侨大学 能自动回料的除尘过滤元件性能检测装置及检测方法
CN111014861A (zh) * 2019-12-31 2020-04-17 牧野机床（中国）有限公司 一种线切割机床过滤装置的工作方法
WO2022135670A1 (fr) * 2020-12-21 2022-06-30 Wilo Se Surveillance de l'intégrité d'une membrane d'ultrafiltration pendant le fonctionnement d'un filtre

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56129004A (en) * 1980-03-12 1981-10-08 Toshiba Corp Inspection of fluid separation membrane module
JPH04338219A (ja) * 1991-05-16 1992-11-25 Hitachi Plant Eng & Constr Co Ltd 濾過膜分離方法
WO1996001676A1 (fr) * 1994-07-08 1996-01-25 Pall Corporation Systeme de filtre dynamique
JP2001269552A (ja) * 2000-03-24 2001-10-02 Kurita Water Ind Ltd 膜分離方法および装置
US20040079700A1 (en) * 2002-10-23 2004-04-29 Jonathan Wood Production of water for injection using reverse osmosis

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56129004A (en) * 1980-03-12 1981-10-08 Toshiba Corp Inspection of fluid separation membrane module
JPH04338219A (ja) * 1991-05-16 1992-11-25 Hitachi Plant Eng & Constr Co Ltd 濾過膜分離方法
WO1996001676A1 (fr) * 1994-07-08 1996-01-25 Pall Corporation Systeme de filtre dynamique
JP2001269552A (ja) * 2000-03-24 2001-10-02 Kurita Water Ind Ltd 膜分離方法および装置
US20040079700A1 (en) * 2002-10-23 2004-04-29 Jonathan Wood Production of water for injection using reverse osmosis

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011033537A1 (fr) * 2009-09-18 2011-03-24 Tmci Padovan S.P.A. Appareil et méthode de filtrage de liquides, en particulier de liquides organiques
US20120132595A1 (en) * 2009-09-18 2012-05-31 Tmci Padovan S.P.A. Apparatus and method for filtering liquids, particularly organic liquids
US9028701B2 (en) 2009-09-18 2015-05-12 Tmci Padovan S.P.A. Apparatus and method for filtering liquids, particularly organic liquids
WO2012060778A1 (fr) * 2010-11-01 2012-05-10 Nanyang Technological University Capteur à membrane et procédé de détection d'encrassement dans un fluide
US10159941B2 (en) 2010-11-01 2018-12-25 Nanyang Technological University Membrane sensor and method of detecting fouling in a fluid
FR2973718A1 (fr) * 2011-04-06 2012-10-12 Degremont Dispositif et procede pour tester des modules de filtration membranaires, en particulier des modules d'ultrafiltration, de microfiltration ou d'osmose inverse
WO2018197757A1 (fr) 2017-04-28 2018-11-01 Valmet Technologies Oy Système, agencement et procédé de détection de détériorations à l'aide de filtres à disques continus
CN109603321A (zh) * 2018-08-21 2019-04-12 华侨大学 能自动回料的除尘过滤元件性能检测装置及检测方法
CN111014861A (zh) * 2019-12-31 2020-04-17 牧野机床（中国）有限公司 一种线切割机床过滤装置的工作方法
CN111014861B (zh) * 2019-12-31 2022-02-08 牧野机床（中国）有限公司 一种线切割机床过滤装置的工作方法
WO2022135670A1 (fr) * 2020-12-21 2022-06-30 Wilo Se Surveillance de l'intégrité d'une membrane d'ultrafiltration pendant le fonctionnement d'un filtre

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