WO2012009761A1 - Module membranaire métallique moulé et son procédé de fabrication - Google Patents

Module membranaire métallique moulé et son procédé de fabrication Download PDF

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Publication number
WO2012009761A1
WO2012009761A1 PCT/AU2011/000925 AU2011000925W WO2012009761A1 WO 2012009761 A1 WO2012009761 A1 WO 2012009761A1 AU 2011000925 W AU2011000925 W AU 2011000925W WO 2012009761 A1 WO2012009761 A1 WO 2012009761A1
Authority
WO
WIPO (PCT)
Prior art keywords
bundle
metallic
membranes
membrane bundle
potting compound
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.)
Ceased
Application number
PCT/AU2011/000925
Other languages
English (en)
Inventor
Gilbert Erskine
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.)
STERI-FLOW FILTRATION SYSTEMS (AUST) Pty Ltd
Original Assignee
STERI-FLOW FILTRATION SYSTEMS (AUST) Pty Ltd
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
Priority claimed from AU2010903294A external-priority patent/AU2010903294A0/en
Application filed by STERI-FLOW FILTRATION SYSTEMS (AUST) Pty Ltd filed Critical STERI-FLOW FILTRATION SYSTEMS (AUST) Pty Ltd
Priority to AU2011282477A priority Critical patent/AU2011282477A1/en
Publication of WO2012009761A1 publication Critical patent/WO2012009761A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/02—Inorganic material
    • B01D71/022—Metals
    • 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
    • B01D63/02—Hollow fibre modules
    • B01D63/021—Manufacturing thereof
    • B01D63/022—Encapsulating hollow fibres
    • B01D63/0221—Encapsulating hollow fibres using a mould
    • 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
    • B01D63/061—Manufacturing 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
    • B01D63/069—Tubular membrane modules comprising a bundle of tubular membranes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B01D2313/02—Specific tightening or locking mechanisms

Definitions

  • the present invention relates to a porous metallic membrane bundle for use in a filter module, and to a method of manufacturing the same.
  • the invention provides a means of fitting small diameter tubular membranes into filter modules, and an effective alternative to welding of larger diameter membranes to module face plates.
  • Porous filter membranes are used in numerous industries to separate particulates from fluid and gas.
  • the membranes can be constructed from various materials including metal, plastic and ceramics.
  • Stainless steel membrane technology was first developed more than twenty years ago, however, has not been widely implemented compared to other cross flow membranes, and is only typically used when other membranes fail.
  • a typical metallic membrane is manufactured by the known art of Isostatic Pressing.
  • the green membrane produced is subsequently sintered, welded into the required lengths, coated with the appropriate inner membrane, and then re-fired. This process requires time and manpower which contribute to the significant costs.
  • Lumen standard commercial metallic membranes are produced having diameters of around 17- 19mm, which contributes to their expense and foot print. Smaller diameter metallic membranes would reduce the cost and foot print, and also provide other benefits, but they have not been developed to date. This is because of the difficulty associated with terminating bundles of small diameter tubular membranes for placement inside filter modules.
  • end stop members adapted to hold said membranes in a tightly packed state inside said module.
  • end stop members are formed by a potting compound moulded around ends of the tightly packed membranes.
  • said potting compound is resin-based, thermoplastic, thermosetting, polyurethane, epoxy or any combination of cross -linking.
  • said filter module includes a hollow casing.
  • each end stop member is shaped correspondingly with an inner surface of said filter module casing to enable a snug fit between the stop members and said inner surface.
  • the bundle further includes a means of allowing for expansion and contraction between said bundle and casing.
  • each of said end stop members includes at least one O-ring groove for accommodating an O-ring, said O-ring adapted to form a seal between the end stop member and the filter module and constituting said means for allowing for expansion and contraction between said bundle and casing.
  • each metallic membrane includes a diameter of between 1 and 5mm.
  • each metallic membrane includes a diameter of between 3 and 20mm.
  • each metallic membrane includes a diameter of more than 20mm.
  • a filter module including at least one metallic membrane bundle as characterised in any one of the preceding claims.
  • a method of producing a filter membrane bundle for use in a filter module comprising the steps of:
  • said filter module includes a substantially cylindrical casing into which said filter bundle is adapted to be fitted.
  • said moulds are shaped to form said potting compound into a shape which allows for the moulded ends to fit snugly inside the filter module casing.
  • the moulds are also shaped to form at least one O-ring groove on an outer surface of said potting compound, each groove adapted to accommodate an O-ring forming a seal between the bundle and the casing.
  • the potting compound selected is dependent upon the filter application.
  • the compound is resin-based, thermoplastic, thermosetting, polyeurethane, epoxy or any combination of cross linking, and the type chosen is dependant upon whether the application requires high temperature, low temperature, food grade, oil resistant or chemical resistant compounds).
  • a filter membrane module including a casing inside which is housed a filter membrane bundle manufactured in accordance with the method defined above.
  • Figure 1 illustrates a perspective view of a potted metallic membrane module in
  • Figure 2 illustrates a perspective view of a plurality of tightly packed, small diameter metallic membranes
  • Figure 3 illustrates a perspective and end view of a bundle of tightly packed metallic
  • Figure 4 illustrates an enlarged cross sectional view of one end of the bundle of Figure 3;
  • Figure 5 illustrates a perspective and view of a bundle of tightly packed metallic
  • Figure 6 illustrates an enlarged cross sectional view of one end of the bundle of Figure 5.
  • the present invention relates to a filter module 10 which houses metallic membranes 12 having a lumen diameter from as low as 3mm (to 20mm or greater).
  • the invention further relates to a method of terminating bundles 14 of such small diameter membranes 12 for use in filter modules
  • small diameter metallic membranes are preferably constructed as follows:
  • the mix is then extruded using specially designed die heads (single or multi head dies) of various diameters from 3mm to 20mm or greater;
  • die heads single or multi head dies
  • the material is cured using a heating or cooling source, again depending on the binder selected (typically either hot air, induction heating or a cooling media);
  • the membranes are cut to length and by the known art of sintering are sintered; (e) an inner coating is applied to the membranes either in a high vacuum furnace or a low hydrogen continuous furnace; and
  • FIG. 1 there is shown a filter module 10 including a bundle 14 of small diameter metallic membranes 12 encased inside the module 10 in accordance with the present invention.
  • the filter module 10 is depicted like so to assist the reader in understanding the present invention, and that such filter modules may well include additional features and appear quite different in reality.
  • the important feature of the module 10 is that it includes a hollow body or casing 16 which houses the aforementioned bundle 14 of metallic membranes as will be described in more detail below.
  • the filter 10 need not be cylindrical, but could be any other cross sectional shape.
  • FIG 2 illustrates a bundle 14 prior to being inserted into the module 10, and it can be seen that it is made up of a plurality of tightly packed, tubular metallic membranes 12.
  • Figures 3-4 show how the bundle 14 is held in position at ends thereof by stop members 18. It is envisaged that larger diameter modules could hold up to thousands of these tightly packed, small diameter membranes 12.
  • the stop members 18 are an important feature of the invention because they provide a unique alternative to welding the ends of each membrane to a module end plate (not shown), a method which is not possible for smaller diameter metallic membranes.
  • Each bundle 14 is formed by the following steps:
  • potting compounds tend to be resin-based, thermoplastic, thermosetting, polyeurethane, epoxy or any combination of cross linking, and are available in different types depending on whether the application requires high temperature, low temperature, food grade, oil resistant or chemical resistant compounds);
  • step (d) repeating step (b) on the opposite end of the bundle (alternatively, this end could be terminated simultaneously); and (e) curing the potting compound, and removing the moulds.
  • each stop member 18 shown in Figures 3-4 the mould used (not shown) is of a cylindrical construction having an internal diameter slightly smaller than the internal diameter of filter module hollow body 16. This ensures that once the bundle is constructed, it can be inserted into the module such the stop members 18 fit snugly inside the hollow body 16. Some filters may require a water-tight seal between each of the stop members 18 and the inside surface of the filter module hollow body 16.
  • Figures 5-6 illustrate a bundle 20 of metallic membranes 12 including stop members 22 according to a second embodiment of the invention.
  • Each stop member 22 includes a pair of O-ring grooves 24 for accommodating O-rings (not shown) in a configuration which provides a seal between the compound and the filter module.
  • the potting compound mould (not shown) includes a pair of annular shoulders (not shown) on its inside surface suitably shaped to form the grooves 24 when the mould is filled.
  • This O-ring configuration also assists in allowing for expansion and contraction between the membrane bundle 20 and the outer casing 16. It is to be understood that other methods could be used to seal the compound to the casing, provided it too allows for expansion and contraction.
  • the final step in assembling the filter membrane modules 10 is by fitting the bundle of lumen 14/20 into the outer casing 16.
  • the present invention thus enables the use of small diameter membranes of 3mm or greater diameter in filter modules, which in the past could not be used.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

La présente invention concerne un faisceau de membranes métalliques poreuses utilisable dans un module de filtration, ainsi que son procédé de fabrication. L'invention concerne, en particulier, un moyen de mise en place de membranes tubulaires de faible diamètre dans des modules de filtration, ainsi qu'une solution de remplacement efficace à l'opération consistant à souder des membranes de gros diamètre aux plaques terminales des modules.
PCT/AU2011/000925 2010-07-23 2011-07-22 Module membranaire métallique moulé et son procédé de fabrication Ceased WO2012009761A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2011282477A AU2011282477A1 (en) 2010-07-23 2011-07-22 Potted metallic membrane module and method of making the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2010903294A AU2010903294A0 (en) 2010-07-23 Potted metallic membrane module and method of making the same
AU2010903294 2010-07-23

Publications (1)

Publication Number Publication Date
WO2012009761A1 true WO2012009761A1 (fr) 2012-01-26

Family

ID=45496378

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2011/000925 Ceased WO2012009761A1 (fr) 2010-07-23 2011-07-22 Module membranaire métallique moulé et son procédé de fabrication

Country Status (2)

Country Link
AU (1) AU2011282477A1 (fr)
WO (1) WO2012009761A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2993185A1 (fr) * 2012-07-11 2014-01-17 Andre Charles Marie Rousset Structure de filtration, procede de fabrication de cette structure et filtre comportant cette structure

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6887304B2 (en) * 2001-03-16 2005-05-03 Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Method for producing a hollow fiber membrane module or a capillary membrane module
US20070039868A1 (en) * 2003-09-29 2007-02-22 Yuzuru Ishibashi External pressure type hollow fiber membrane module

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6887304B2 (en) * 2001-03-16 2005-05-03 Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Method for producing a hollow fiber membrane module or a capillary membrane module
US20070039868A1 (en) * 2003-09-29 2007-02-22 Yuzuru Ishibashi External pressure type hollow fiber membrane module

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2993185A1 (fr) * 2012-07-11 2014-01-17 Andre Charles Marie Rousset Structure de filtration, procede de fabrication de cette structure et filtre comportant cette structure

Also Published As

Publication number Publication date
AU2011282477A1 (en) 2013-03-14

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