WO2001058575A1 - Filtre pour appareil de filtration de fluides - Google Patents

Filtre pour appareil de filtration de fluides Download PDF

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Publication number
WO2001058575A1
WO2001058575A1 PCT/CA2001/000151 CA0100151W WO0158575A1 WO 2001058575 A1 WO2001058575 A1 WO 2001058575A1 CA 0100151 W CA0100151 W CA 0100151W WO 0158575 A1 WO0158575 A1 WO 0158575A1
Authority
WO
WIPO (PCT)
Prior art keywords
envelope
fluid
filter
spiral
inlet
Prior art date
Application number
PCT/CA2001/000151
Other languages
English (en)
Inventor
James Edward Munro
Original Assignee
James Edward Munro
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 James Edward Munro filed Critical James Edward Munro
Priority to AU2001233525A priority Critical patent/AU2001233525A1/en
Publication of WO2001058575A1 publication Critical patent/WO2001058575A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/003—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions including coalescing means for the separation of liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/58—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in parallel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
    • 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
    • B01D63/10—Spiral-wound membrane modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2265/00—Casings, housings or mounting for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2265/06—Details of supporting structures for filtering material, e.g. cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2275/10—Multiple layers
    • B01D2275/105—Wound layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B01D2313/18—Specific valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B01D2313/42—Catalysts within the flow path

Definitions

  • the effectiveness of a filter depends to a great extent upon the amount of surface area that the filter contains. As a general rule the greater the surface area, the more effective the filter.
  • the effectiveness of the filter also depends upon the amount of surface area that is use. Fluids flowing through a filter follow a path of least resistance. This "channelling" of fluids along the path of least resistance often results in only a portion of the surface area of the filter being used, which greatly diminishes surface area exposure of the fluids to the filtration medium.
  • What is required is a filter for a fluids filtration apparatus that will provide an increased surface area for filtration and which will be less prone to channelling.
  • a filter for a fluid filtration apparatus includes a containment envelope made from a filtration medium.
  • the containment envelope has an inlet, an exterior surface, and an interior.
  • the containment envelope is wound in a spiral configuration with the inlet end centrally positioned thereby forming a spiral filtration core.
  • the spiral filtration core has a central feed passage that communicates with the inlet of the envelope.
  • the above described spiral filtration core provides a considerable surface area of filtration medium to which fluids are exposed, along with a flow path that is unlikely to be subject to channelling.
  • the spiral configuration permits a comparatively large filtration surface area to be packed into a relatively small space.
  • the life and solids loading capability of the filter is increased.
  • This configuration can be used m a wide variety of filtration applications by selecting an appropriate filtration medium. In tests it has proven to be effective m separating fluids having differing properties. For such application a filtration medium is used that will enable a first fluid to pass, but will prevent or resist the passage of a second fluid.
  • beneficial results may be obtained through the use of the filter, as described above, some filtration processes are more effective if undertaken under pressure. Even more beneficial results may, therefore, be obtained when the spiral filtration core is contained to limit its radial expansion, so that it does not expand to the point of bursting.
  • a pressure differential is created between the pressure inside of the envelope and the pressure outside of the envelope. This pressure differential helps accelerate the process of separating the fluids.
  • beneficial results may be obtained through the use of the filter, as described above, the process of separating the fluids may also be accelerated through the use of a catalyst. Even more beneficial results may, therefore, be obtained when a fluid permeable spacer material is wound in a spiral configuration with the containment envelope.
  • the spacer material can be either positioned inside of the containment envelope or outside of the containment envelope.
  • a mesh is the preferred type of suitable spacer. The material out of which the mesh is made is selected to trigger a reaction, such as oxidization .
  • FIGURE 1 is a perspective view of a preferred embodiment of filter constructed in accordance with the teachings of the present invention.
  • FIGURE 2 is an exploded perspective view of the filter illustrated in FIGURE 1.
  • FIGURE 3 is a side elevation view, in section, of the filter illustrated in FIGURE 1.
  • FIGURE 4 is a cutaway perspective view of a fluids filtration apparatus equipped with the filter illustrated in FIGURE 1.
  • FIGURES 1 through 4 The preferred embodiment, a filter for a fluids filtration apparatus generally identified by reference numeral 10, will now be described with reference to FIGURES 1 through 4.
  • filter 10 has a housing 12 having a first end 14, a second end 16, and peripheral sidewalls 18 defining an interior cavity 20.
  • a spiral filtration core 22 is disposed within interior cavity 20 of housing 12.
  • Spiral filtration core 22 has a first end 54 and a second end 50.
  • Spiral filtration core 22 consists of a containment envelope 24 made from filtration medium and a fluid permeable spacer material 26.
  • Containment envelope 24 has an inlet 25, an exterior surface 29, an interior 31 and a closed end 27 remote from inlet 25.
  • fluid permeable spacer material 26 and containment envelope 24 are wound m a spiral configuration with inlet end 25 of envelope centrally positioned m spiral filtration core 22.
  • Fluid permeable spacer material 26 helps m the formation of a plurality of flow spaces 33 m spiral filtration core 22 along exterior surface 29 of envelope 24, and can also serve a dual function serving as a catalyst substrate, as will hereinafter be further described.
  • Spiral filtration core 22 has a central feed passage 28 that communicates with inlet 25 of envelope 24. Fluids being filtered are directed under pressure into central feed passage 28 via a feed tube 30.
  • Feed tube 30 has a first end 40, a second end 42, and a peripheral sidewall 43.
  • An inlet 45 is positioned at first end 40.
  • Second end 42 is closed.
  • a plurality of outlets 32 are positioned along a length of peripheral sidewall 43 allow a fluid entering at first end 40 of feed tube 30 to pass radially outward from feed tube 30 into inlet 35 of envelope 24.
  • outlets 32 can have any one of several shapes, it is preferred that outlets 32 be slotted.
  • a catalyst substrate 37 may be positioned
  • mixed fluids are directed through feed tube 30 into central feed passage 28 where the mixed fluids pass through slotted outlet 32 into inlet 25 of envelope 24.
  • a first fluid passes through the filtration medium out of which envelope 24 is made, as indicated by arrows 53, and migrates through fluid permeable spacer material 26 along exterior surface 29 of envelope 24 to exit spiral filtration core 22.
  • a second fluid unable to pass through the filtration medium out of which envelope 24 is made, migrates along interior 31 of envelope 24, as indicated by arrows 55 until it reaches closed end 27.
  • envelope 24 is removed and emptied when it becomes filled with the second fluid. Envelope 24 is, then, cleaned and reused. Alternatively, envelope 24 can be backwashed without being removed. In continuous flow applications, the second fluid overflows back through inlet 25.
  • spiral filtration core 22 tends to expand as fluids enter inlet 25 of envelope 24.
  • constricting bands 34 and 36 are, therefore, positioned around spiral filtration core 22 to limit such expansion.
  • spiral filtration core 22 be contained within housing 12, so that expansion is limited by peripheral sidewalls 18 of housing 12. As long as the expansion is confined so that filtration core 22 does not burst due to pressure, creating a pressure differential between interior 31 of envelope 24 and exterior surface 29 of envelope 24 serves to enhance the filtration process.
  • the mesh When the mesh is placed along exterior surface 29 of envelope 24, prior to winding filtration core 22, the mesh serves as fluid permeable spacer material 26.
  • the mesh can be made from either reactive or non- reactive materials and can, therefore, serve as a catalyst substrate.
  • fluid permeable spacer material 26 is also, a catalyst substrate, it is more beneficial to have a catalyst substrate within envelope 24.
  • mesh s inserted into interior 31 of envelope 24 prior to winding filtration core 22.
  • An example of a reactive material is a MN O 2 catalyst coating on a mesh substrate which promotes an oxidization reaction.
  • non-reactive materials are teflon or stainless steel mesh which is unaffected by a large variety of fluids to be treated.
  • Mesh is flexible enough to allow spiral filtration core 22 to be formed, and yet is rigid enough to enable spiral filtration core 22 to retain its spiral shape and is strong enougn to provide firm support for filtration medium 24 when spiral filtration core 22 is operated under pressure.
  • Mesh can also be given a reactive coating or a static charge to promote secondary processing of the first fluid.
  • spiral filtration core 22 fits within housing 12.
  • Feed tube 30 extends from central feed passage 28 at first end 54 of spiral filtration core 22.
  • An annular travelling seal 56 is positioned at first end 54 of spiral filtration core 22.
  • Travelling seal 56 has a central passage 64.
  • Feed tube 30 is positioned m central passage 64, so that travelling seal 56 encircles m close fitting relation first end 40 of feed tube 30.
  • Travelling seal 56 provides a seal between feed tube 30 and central feed passage 28.
  • a further 0-r ⁇ ng seal 70 is used m con unction with travelling seal 56.
  • a spiral spring 58 may be used m conjunction with travelling seal 56 to assist with alignment when filter 10 is installed m housing 12.
  • Filter 10 can be used to remove water from such waste gas.
  • envelope 24 is made using a hydrophobic filter medium.
  • Pressure vessel 101 has a mixed fluids inlet 126 for fluids to be filtered (m this case - "wet" gas containing gas with entrained water vapour) , a first outlet 138 for recovery of the first fluid (m this case - "dry” gas) and a second outlet 152 for recovery of the second fluid (m this case - water) .
  • Pressure vessel 101 has a body 100 with a first end 102, a second end 104 and peripheral sidewalls 106.
  • Filters 10 are situated within pressure vessel 101, and second end 104 of body 100 is closed with a lid 108 and sealed by an CD- ring seal 110.
  • a tube 112 extends from first end 102 through lid 108 at second end 104 of body 100. Tube 112 has a first end 114 and a second end 116. First end 114 is secured to first end 102 of body 100.
  • a threaded connector 118 matingly engages second end 116 of tube 112, thereby providing a clamping force against lid 108 to urge O-rmg seal 110 into sealing engagement with second end 104 of body 100.
  • a cover 122 is secured at second end 104 of body 100 by securing means, illustrated as a clamp 124.
  • a pressure gauge 122 extends through cover 122.
  • a bypass safety valve 132 leading to a bypass pipe 144 is connected to inlet pipe 128.
  • a manual shut off valve 134 is provided to facilitate maintenance and replacement of bypass safety valve 132.
  • a pressure gauge 136 is used to measure a pressure of fluid m inlet pipe 128. "Wet" gas is fed through an inlet pipe 128 m a direction indicated by arrow 130 into mixed fluids inlet 126. The fluid moves under pressure through mixed fluids inlet 126 into first end 40 of feed tubes 30 of each filter 10. Referring to FIGURE 3, the hydrophobic filtration medium of envelope 24 allows gas to pass, but retains water within envelope 24. "Wet” gas migrates radially outward through outlets 32 of feed tube 30 into inlet 25 of envelope 24.
  • the "dry” gas passes through the filtration medium out of which envelope 24 is made, as indicated by arrows 53, and migrates through fluid permeable spacer material 26 along exterior surface 29 of envelope 24 to exit spiral filtration core 22. Referring to FIGURE 4, this "dry” gas then passes through first outlet 138 into a first outlet pipe 140, as indicated by arrow 142. As previously described, a bypass p pe 144 connects inlet pipe 128 to safety valve 132. When the flow through pressure vessel 101 is restricted, for example by a clogged filter, pressure builds up. When this pressure build up rises above a selected value m inlet pipe 128, safety valve 132 is activated to open and relieve the pressure.
  • hydrophobic filtration medium 24 is impermeable by water. Water cannot pass through envelope 24 tends to condense on the filtration medium out of which envelope 24 is made. As condensate accumulates, water migrates along interior 31 of envelope 24, as indicated by arrows 55. The condensation can be accelerated by the selection of an appropriate catalyst substrate 37. Even if a non-reactive mesh is used as a catalyst substrate, it will provide a surface onto which water vapour may condense. In a batch process, water would be allowed to accumulate m envelope 24, and envelope 24 would periodically be removed and emptied. It is preferred, however, that the process be continuous.
  • water is allowed to overflow back out of inlet 25.
  • Water which overflows accumulates m a second fluid collection area 150 at first end 102 of body 100, from where it is removed through a second outlet 152 into a second outlet pipe 154 as indicated by arrow 156.
  • second outlet 152 be float controlled so that second outlet 152 opens to allow water to drain into second outlet pipe 154, whenever the float rises above a preset level.
  • a hydrophobic fluid can be separated from a mixture with water, when the filtration medium out of which envelope 24 is fabricated is a hydroph llic material.
  • a mixed fluid of water and hydrophobic fluid is fed into inlet 25 of envelope 24. Water passes through the hydrophillic filtration medium out of which envelope 24 is made and then migrates through fluid permeable spacer material 26 along exterior surface 29 of envelope 24 to exit spiral filtration core 22. The hydrophobic fluid is unable to pass through the filtration medium out of which envelope 24 is made.
  • the hydrophobic fluids must, therefore, migrates along interior 31 of envelope 24, as indicated by arrows 55.
  • an appropriate catalyst substrate 37 may be selected to accelerate the separation process.
  • the unit can be configured for either batch processing or continuous processing. Depending upon the nature and volume of fluids being separated, batch processing may be more appropriate.
  • the described filter can be used m separating solids from liquids, separating liquids for liquids, separating gases from liquids, separating gases from gases, and for separating solid particles from gases. It will also be apparent to one skilled m the art that closed end 27 of envelope 24 could be left open m whole or m part, if pressure was not required for the separation and if an alternative flow path was arranged from end 27. It will further be apparent to one skilled m the art that the described filter could work to a limited degree with a reversal of flow from the exterior surface into the interior of the envelope. The limitation of such a reversal or inverse flow is that instead of pressure tending expand the envelope, pressure would tend to collapse the envelope. The collapse of the envelope would prevent is from functioning as intended. It will finally be apparent to one skilled m the art that modifications may be made to the illustrated embodiment without departing from the spirit and scope of the invention as hereinafter defined m the Claims .

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Filtering Materials (AREA)

Abstract

L'invention concerne un filtre utilisé pour un appareil de filtration de fluides. Cet appareil comprend une enveloppe de rétention composée d'un matériau filtrant. Cette enveloppe possède une ouverture, une surface extérieure et un intérieur. L'enveloppe est enroulée en forme de spirale, l'extrémité de l'ouverture étant placée au centre, formant ainsi un noyau filtrant spiralé. Ce dernier présente un passage central communiquant avec l'ouverture de l'enveloppe. Lorsque les fluides mélangés sont dirigés à l'intérieur du passage central, un premier fluide passe à travers le matériau de filtration formant l'enveloppe et migre le long de la surface extérieure de l'enveloppe, afin de sortir du noyau filtrant spiralé et un second fluide, ne pouvant passer par le matériau filtrant, migre le long de l'intérieur de l'enveloppe.
PCT/CA2001/000151 2000-02-11 2001-02-09 Filtre pour appareil de filtration de fluides WO2001058575A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001233525A AU2001233525A1 (en) 2000-02-11 2001-02-09 A filter for a fluids filtration apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA002298418A CA2298418A1 (fr) 2000-02-11 2000-02-11 Un filtre pour un appareil de filtration de liquides
CA2,298,418 2000-02-11

Publications (1)

Publication Number Publication Date
WO2001058575A1 true WO2001058575A1 (fr) 2001-08-16

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ID=4165310

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2001/000151 WO2001058575A1 (fr) 2000-02-11 2001-02-09 Filtre pour appareil de filtration de fluides

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AU (1) AU2001233525A1 (fr)
CA (1) CA2298418A1 (fr)
WO (1) WO2001058575A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7316780B1 (en) 1999-01-29 2008-01-08 Pall Corporation Range separation devices and processes
US7811343B2 (en) 2004-01-27 2010-10-12 Alberta Research Council, Inc. Method and apparatus for separating liquid droplets from a gas stream
US8043512B2 (en) 2008-04-11 2011-10-25 Pall Corporation Fluid treatment arrangements and methods
US8048315B2 (en) 2008-07-28 2011-11-01 Pall Corporation Fluid treatment arrangements and methods

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3872014A (en) * 1974-03-11 1975-03-18 Aerojet General Co Membrane separation apparatus
US4083780A (en) * 1976-07-29 1978-04-11 Envirogenics Systems Company Fluid purification system
US5137637A (en) * 1991-06-18 1992-08-11 Exxon Chemical Patents Inc. Rotational high flux membrane device
WO1999038602A1 (fr) * 1998-01-30 1999-08-05 Kam Chahal Dispositif d'enrichissement de l'air atmospherique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3872014A (en) * 1974-03-11 1975-03-18 Aerojet General Co Membrane separation apparatus
US4083780A (en) * 1976-07-29 1978-04-11 Envirogenics Systems Company Fluid purification system
US5137637A (en) * 1991-06-18 1992-08-11 Exxon Chemical Patents Inc. Rotational high flux membrane device
WO1999038602A1 (fr) * 1998-01-30 1999-08-05 Kam Chahal Dispositif d'enrichissement de l'air atmospherique

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7316780B1 (en) 1999-01-29 2008-01-08 Pall Corporation Range separation devices and processes
US7811343B2 (en) 2004-01-27 2010-10-12 Alberta Research Council, Inc. Method and apparatus for separating liquid droplets from a gas stream
US8043512B2 (en) 2008-04-11 2011-10-25 Pall Corporation Fluid treatment arrangements and methods
US8048315B2 (en) 2008-07-28 2011-11-01 Pall Corporation Fluid treatment arrangements and methods

Also Published As

Publication number Publication date
AU2001233525A1 (en) 2001-08-20
CA2298418A1 (fr) 2001-08-11

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