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WO2007004265A1 - Filtre, boîtier pour filtre, et procédé permettant d’assembler un filtre - Google Patents

Filtre, boîtier pour filtre, et procédé permettant d’assembler un filtre Download PDF

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Publication number
WO2007004265A1
WO2007004265A1 PCT/JP2005/012115 JP2005012115W WO2007004265A1 WO 2007004265 A1 WO2007004265 A1 WO 2007004265A1 JP 2005012115 W JP2005012115 W JP 2005012115W WO 2007004265 A1 WO2007004265 A1 WO 2007004265A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter element
filter
casing
end surface
cap
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/JP2005/012115
Other languages
English (en)
Japanese (ja)
Inventor
Kiyotaka Sugiura
Kohji Hattori
Hiroyuki Oyachi
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.)
NGK Insulators Ltd
Original Assignee
NGK Insulators 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
Application filed by NGK Insulators Ltd filed Critical NGK Insulators Ltd
Priority to PCT/JP2005/012115 priority Critical patent/WO2007004265A1/fr
Publication of WO2007004265A1 publication Critical patent/WO2007004265A1/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
    • B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
    • B01D63/06—Tubular membrane modules
    • B01D63/066—Tubular membrane modules with a porous block having membrane coated passages
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/04—Tubular membranes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration

Definitions

  • the present invention relates to a filter, a casing for the filter, and a method for assembling the filter that can be suitably used to remove harmful substances such as suspended substances and pathogenic microorganisms in a liquid, and in particular, water purification
  • the present invention relates to a filter, a filter casing, and a method for assembling the filter that can be suitably used for a large amount of water treatment in a field.
  • a ceramic porous body is used as a filter medium, and the filter is used as a filter 4 force filter element in which cells 41 are formed so that liquid flow directions are parallel to each other.
  • This filter element has a partition that also has a porous ceramic body, and has a no-cam structure in which cells 41 separated by the partition are formed! /
  • the monolithic filter element as described above constitutes a filtration membrane and a base material in which liquid is formed on the inner wall of a cell when a stock solution (liquid to be treated) is supplied into a plurality of cells at a predetermined pressure.
  • a stock solution liquid to be treated
  • the filter element is structured to be built in the casing in a state in which the outer peripheral surface side of the base material and the end surface of the cell opening are liquid-tightly separated by the sealing material, thereby Can be recovered.
  • the monolithic filter element as described above may be used alone. When it is required to process a large amount of undiluted solution (raw water) such as in a field, it is possible to store a large number of filter elements in the casing to increase the filtration area and improve the processing capacity. Has been done.
  • Patent Document 1 Japanese Patent Laid-Open No. 10-180049
  • Patent Document 2 Japanese Patent Laid-Open No. 10-184919
  • the present invention is characterized by providing a filter, a filter casing, and a method of assembling the filter that are simple in structure and easy to load and replace.
  • the present invention provides the following filter, filter casing and filter assembly method.
  • a filter comprising a casing and a filter element housed in the casing, wherein the filter element forms a cell having an opening at a lower end surface and penetrating to the upper end surface.
  • the casing includes a casing body that surrounds a side surface of the filter element, an upper portion of the filter element, and a cap portion that is detachable from the casing body.
  • the casing body includes the filter body.
  • a filter comprising: a cylindrical side wall portion having a hollow portion through which an element can be inserted and removed upward; and a flange portion protruding inward from a lower portion of the side wall portion, wherein the filter element is supported by the flange portion.
  • a method for assembling a filter that houses a columnar filter element in a casing having a cylindrical casing main body and a cap portion, and a step of covering the first end face of the filter element with a protective cap Placing the filter element on the assembly flange with the first end face down, covering the side of the filter element with a protective cover, lowering the casing body from above the filter element, A step of inserting the element into the casing body, a step of removing the protective cover, a step of attaching the seal member to the outer peripheral portion of the second end surface, a step of fixing the assembly flange and the casing body, and a casing Inverting the body and filter element to bring the second end face down, the assembly flange and the protective cap Assembly of the filter including the step of removing the cap, the step of attaching the seal member to the outer peripheral portion of the first end surface, and the step of attaching the cap portion so as to cover the first end surface and fixing the casing body and the cap portion Method.
  • the casing is divided into at least two detachable members, a casing main body and a cap portion, and a flange portion is provided on the casing main body, so that the filter element can be easily inserted and removed from the upper part. With this structure, the filter element can be easily loaded and replaced.
  • FIG. 1 is a schematic perspective view showing an example of a filter element.
  • FIG. 2 is a cross-sectional view schematically showing one embodiment of the filter of the present invention.
  • FIG. 3 is a perspective view schematically showing one embodiment of a filter element according to the present invention.
  • FIG. 4 is a perspective view schematically showing another embodiment of the filter element according to the present invention.
  • FIG. 5 (a) is a process diagram schematically showing one embodiment of a filter assembling method of the present invention.
  • FIG. 5 (b) is a process chart schematically showing one embodiment of the filter assembling method of the present invention.
  • FIG. 2 is a cross-sectional view schematically showing one embodiment of the filter of the present invention.
  • FIG. 3 is a perspective view schematically showing one embodiment of a filter element according to the present invention.
  • a filter 1 shown in FIG. 2 includes a casing 20 and a filter element 10 accommodated in the casing 20.
  • the filter element 10 shown in FIG. 3 includes a porous partition wall 16.
  • a cell 12 having an opening at the lower end surface 14 and penetrating to the upper end surface 15 is formed.
  • the casing 20 includes a casing body 25 that surrounds the side surface of the filter element 10 and a cap portion 22 that covers the upper portion of the filter element 10.
  • the cap portion 22 is detachably attached to the casing body 25 via an O-ring 28.
  • the O-ring 28 is not indispensable as long as the gap between the cap 22 and the casing body 25 can be liquid-tightly sealed!
  • the cap 22 is attached to the casing body 25 via the O-ring 28. Is preferred.
  • the casing body 25 includes a cylindrical side wall portion 26 having a space portion 29 into which the filter element 10 can be taken in and out, and a flange portion 27 protruding inward from the lower portion of the side wall portion 26. Then, the lower end surface 14 of the filter element 10 is supported by the collar portion 27.
  • the filter element can be easily taken in and out from above, and the assembly of the filter and the replacement of the filter element are facilitated.
  • the collar portion 27 preferably protrudes inward so as not to block the opening of the cell 12 of the filter element 10.
  • the range of the outer peripheral portion supported by the collar portion 27 varies depending on the size and structure of the filter element, a preferable range is 1 mm to 3 mm from the outermost periphery to the outermost peripheral cell of the filter element. On the other hand, at least 2 mm from the outermost circumference, especially 2.5 mn to obtain good support strength and to cope with slight dimensional deviations! It is preferable to support a range of ⁇ 3.5 mm.
  • the seal member 30 is preferably arranged so as to seal between the side surface of the filter element and the casing.
  • a vertical filter such as that shown in Fig. 2
  • dimensional changes due to temperature changes and dimensional errors during manufacturing appear more significantly in the vertical direction. Therefore, by sealing with the side face that is not the end face of the filter element, it is possible to cope with dimensional changes and dimensional errors, and the seal state can be maintained well.
  • sealing on the side of the filter element it is preferable to seal on the side of the upper end of the filter element, but it is more preferable to seal on the side of the lower end.
  • Such a configuration is particularly effective in the case of a monolithic filter in which the filter element discharges filtered water from the outer peripheral surface.
  • the force of the seal member 30 is preferably an annular body having an L-shaped cross section as shown in FIG.
  • the seal position is facilitated, and attachment / detachment is facilitated.
  • it can be fitted like a cap on the outer periphery of the end face of the filter element, and can be easily sealed at the end of the side face of the filter element.
  • the number of filter elements stored in the casing is preferably one.
  • the structure can be simplified and the filter can be easily assembled and the filter element can be easily replaced.
  • the filter 1 shown in FIG. 2 further includes a lower header 31 having an opening 32.
  • the filter element is a monolithic filter
  • the liquid to be treated such as raw water usually flows into the lower end surface 14 force, so that the lower header 31 makes it easy to connect to the pipe into which the liquid to be treated is introduced.
  • a casing body 25 shown in FIG. 2 includes an opening 34 in the side wall 26.
  • the side wall portion 26 preferably has an opening 34 through which the filtrate is discharged because the filtrate is discharged from the side force of the filter element 10.
  • the opening 34 is preferably provided on the upper portion of the side wall 26 from the viewpoint of facilitating air bleeding in the casing 20.
  • the cap part 22 shown in FIG. Performing filtration while circulating the stock solution
  • the cap portion 22 has an opening 23 as a discharge port for discharging the stock solution by a filter.
  • the opening 23 can be used as an air supply port when supplying compressed air during backwashing of the filter element.
  • the casing is preferably impermeable and highly corrosion resistant, and is preferably made of a material.
  • a filter element made of resin a casing made of resin is used.
  • a filter element made of ceramic a stainless steel casing is preferably used.
  • the material constituting the filter element is not particularly limited, but generally, a filter element made of resin or ceramic is widely used. In the filter of the present invention, a filter element made of ceramic is preferably used.
  • Ceramics constituting the filter element include, for example, alumina (Al 2 O 3), titanium
  • TiO 2 TiO 2
  • mullite Al 2 O 3 .SiO 2
  • zirconia ZrO 2
  • Alumina is preferably used because it can form a stable slurry that can easily be obtained from a raw material with a controlled particle size and has high corrosion resistance. Ceramics have excellent mechanical strength and durability, and are highly reliable and have high corrosion resistance.Therefore, there is little deterioration during chemical cleaning with acids, alkalis, etc.Furthermore, the average pore diameter that determines the filtration capacity is precise. It has various advantages such as being controllable.
  • Typical examples of ceramic filter elements include tube filters and monolith filters.
  • the tube-shaped filter has a cylindrical partition made of a ceramic porous body, and has a structure in which a single cell penetrating the center is formed, which is divided by the partition.
  • the monolithic filter has a partition wall made of a ceramic porous body and has a no-cam structure in which a large number of cells divided by the partition wall are formed.
  • a monolithic filter having a large filtration area per unit volume and high processing capability is preferably used.
  • a monolithic filter that is easier to increase in size is preferable from the viewpoint of storing one filter element in a casing and facilitating removal of the filter element.
  • the tubular filter and the monolithic filter include a base material having a ceramic porous body strength and a filter membrane having a ceramic porous body force having an average pore diameter smaller than that of the base material formed on the surface of the base material. What was comprised can be used suitably.
  • the filtration function is exhibited exclusively by the filtration membrane, so that the average pore diameter of the substrate can be increased. Therefore, it is possible to reduce the flow resistance when the liquid that has permeated through the partition walls and has flowed out of the cell permeates the inside of the base material, and the amount of water permeation can be increased.
  • the average pore size of the ceramic porous body constituting the filtration membrane varies depending on the required filtration performance (particle size of the substance to be removed). Filter element used for microfiltration and ultrafiltration In this case, the range is from 0.01 to about LO / zm.
  • the average pore diameter of the ceramic porous body constituting the substrate is determined in consideration of the balance between mechanical strength and water permeability. Usually, a ceramic porous body having an average pore diameter of about 1 to several hundred m is used as a substrate.
  • the base material can be obtained by a method of forming a clay containing aggregate particles, drying and firing, and the filtration membrane is formed by forming a slurry containing aggregate particles on the partition wall surface of the base material. Then, it can be formed by a method such as drying and firing.
  • the film can be formed by a conventionally known film formation method such as a dip film formation method, but by a filtration film formation method (see Japanese Patent Publication No. 63-66566) that can effectively prevent film defects such as pinholes. I prefer to do it.
  • a number of cells 3 are formed as in the monolithic filter 2 shown in FIG.
  • a water collecting slit 5 is formed to connect the cell and the external space of the monolith 8, and both end openings of the cell (water collecting cell) communicating with the water collecting slit 5 are plugged by the plugging member 6.
  • the flow resistance when the filtrate flows out of the monolith is larger in the cells near the center, the flow resistance when the filtrate flows out of the monolith is small. Can be used for filtration, and the substantial filtration area and thus the water permeability can be reduced.
  • the filtrate from which the cell force in the vicinity of the central portion has also flowed out can be quickly discharged into the external space of the monolith via the water collecting slit. Therefore, the cell in the vicinity of the center can be effectively used, and the substantial filtration area and thus the water permeability can be greatly increased.
  • Such a structure is particularly effective in the case of a large monolithic filter having a long distance to the outer periphery of the cell force monolith near the center. Therefore, this is a particularly preferable form for increasing the size of the filter element and storing one filter element in the casing.
  • the water collection cell has a structure in which the opening at both ends of the cell is plugged, so that the stock solution does not enter from the cell opening.
  • the water collecting slit can be formed by breaking a group of cells arranged in parallel so as to communicate with the external space of the monolith.
  • Cell breakage is caused by the steps of the molded body and the dried body before firing. It may be performed on the floor or at the stage of the sintered body after firing.
  • the cell opening is plugged by, for example, filling the cell opening to be plugged with a clay (plugging material) having the same material strength as that of the monolith, followed by drying and baking. be able to.
  • the water collecting slits 5 are often formed in the vicinity of both end faces of the monolith 8, respectively.
  • the water collecting slits 5 are generally formed so as to be parallel to each other.
  • the shape of the filter element There are no particular restrictions on the shape of the filter element. Examples of the overall shape include a columnar shape as shown in FIG. 4, a quadrangular prism shape, a triangular prism shape, and the like. Among these, a cylindrical shape that can be easily extruded and easily sealed with a casing with less firing deformation is suitably used.
  • the size of the filter element There is no particular limitation on the size of the filter element, but the filter of the present invention can be easily put in and out of the filter element with a simple structure when applied to a filter containing a large filter element. More effective.
  • the outer diameter is preferably 50 mm or more, more preferably 200 mm or more.
  • the length is preferably 500 mm or more, more preferably 1000 mm or more.
  • the outer diameter is preferably 300 mm or less, more preferably 250 mm or less.
  • the length is preferably 2000 mm or less, more preferably 1500 mm or less.
  • Examples of the cell shape include shapes such as a square cell, a hexagonal cell, and a triangular cell in addition to a circular cell as shown in FIG. .
  • a circular cell that can be easily removed by separating and removing suspended substances deposited on the partition wall surface during backwashing is preferably used.
  • FIG. 5 (a) and FIG. 5 (b) are process diagrams schematically showing an embodiment of the filter assembling method of the present invention.
  • the protective cap 54 is put on the first end face 51 of the filter element 50.
  • the material of the protective cap 54 is not particularly limited as long as the end of the filter element can also protect the impact force.
  • rubber, cloth, urethane, plastic, paper, and the like can be given as preferable examples. .
  • the filter element 50 is placed on the assembly flange 55 with the first end face down.
  • the assembly flange 55 is preferably placed on a cushioning material such as the rubber sheet 64.
  • the assembly flange 55 has irregularities on the surface so that the filter element can be easily positioned.
  • the protective cover 56 is prepared, and the side surface 53 of the filter element 50 is covered with the protective cover 56.
  • the protective cover 56 is preferably cylindrical or bag-shaped. Furthermore, it is preferable to have a bottomed cylindrical shape or bag shape so as to cover the second end face 52. With such a shape, the protective cover can be attached so as to cover the upper force of the filter element.
  • cloth such as quilting, rubber, film, plastic, paper and the like can be given as preferable examples.
  • the casing body 60 is lowered from above the filter element 50, so that the casing body is placed over the protective cover 56, and the filter element 50 is placed in the casing body 60.
  • the casing body 60 is made of a metal such as stainless steel, and the casing body is large, it is preferable that the casing body is lifted by a crane or the like and lowered from above the filter element 50 because the casing body is quite heavy.
  • the assembly flange 55 and the casing body 60 are positioned.
  • the positioning is preferably performed by inserting the stud bolt 57 into the bolt hole of the casing main body 60 with the stud bolt 57 attached to the assembly flange 55.
  • the protective cover 56 is removed.
  • a handle (not shown) for removing the protective force bar at the upper end of the protective cover 56 because the protective cover 56 can be easily removed.
  • the handle can be lifted up by pulling the protective cover from the top of the filter element. A string-like one is preferable.
  • the seal member 59 is attached to the outer peripheral portion of the second end face 52 of the filter element.
  • the seal member 59 is preferably an annular body (seal cap) having an L-shaped cross section. With such a shape, it can be easily attached to the end of the filter element 50 and can be sealed on the side of the filter element 50. If the spacer 58 is arranged between the assembly flange 55 and the casing body 60, the casing body 60 protrudes upward from the filter element 50. Even if (not shown) is provided at this end, the seal member 59 can be easily attached to the second end face.
  • the sealing member 59 is flexible, and even if the dimension of the opening of the casing body 60 is smaller than the outer peripheral dimension of the annular sealing member 59, the casing can be easily formed by deforming the sealing member 59. Can be inserted into the body. Further, the seal member 59 may be attached to the outer peripheral portion of the second end face 52 before the filter element 50 is covered with the protective cover 56. However, the seal member 59 may fall off during the process. This is because it is preferable to reduce the contact area between the seal member 59 and the second end face 52 in order not to block the cell opening of the filter element 50. Further, the seal member 59 is easily deformed. Therefore, there is also a repulsive force that the seal member can easily come off from the second end face 52. Therefore, it is more preferable to attach the seal member 59 after removing the protective cover 56.
  • cap part 61 is attached to the casing body 60 via the O-ring 62.
  • the cap part 61 is also attached to the casing body 60 via the O-ring 62. And complete the filter.
  • the filter of the present invention Since the filter of the present invention has a simple structure and can be easily loaded and replaced with a filter element, it can be suitably used for filtering liquid such as water treatment. In particular, it can be suitably used as a large filter for treating a large amount of water such as a water purification plant.
  • the casing for a filter of the present invention can be suitably used as a part of such a filter.
  • the filter assembly method of the present invention can suitably assemble such a filter.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Filtration Of Liquid (AREA)
  • Filtering Materials (AREA)

Abstract

La présente invention concerne un filtre pourvu d’une structure simple et capable d’être facilement installé et remplacé, un boîtier pour filtre, et un procédé permettant d’assembler un filtre. Le filtre (1) comprend un boîtier (20) et un élément filtre (10) logé dans le boîtier (20). L’élément filtre (10) possède des parois de séparation poreuses formant des cellules qui présentent des ouvertures sur une surface terminale inférieure (14) de l’élément et pénètrent jusqu’à une surface terminale supérieure de l’élément. Le boîtier (20) comprend un corps de boîtier (25) entourant une surface latérale de l’élément filtre (10), ainsi qu’un couvercle (23) couvrant une partie supérieure de l’élément filtre (10) et qui est fixé sur le corps de boîtier (25) de manière à pouvoir se détacher. Le corps de boîtier (25) comprend une section de paroi latérale tubulaire (26) présentant une section creuse (29) par laquelle l’élément filtre (10) peut être installé et sorti vers le haut, ainsi qu’une bride (27) faisant saillie vers l’intérieur à partir d’une partie inférieure de la section de paroi latérale (26). L’élément filtre (10) est soutenu par la bride (27).
PCT/JP2005/012115 2005-06-30 2005-06-30 Filtre, boîtier pour filtre, et procédé permettant d’assembler un filtre Ceased WO2007004265A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2005/012115 WO2007004265A1 (fr) 2005-06-30 2005-06-30 Filtre, boîtier pour filtre, et procédé permettant d’assembler un filtre

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2005/012115 WO2007004265A1 (fr) 2005-06-30 2005-06-30 Filtre, boîtier pour filtre, et procédé permettant d’assembler un filtre

Publications (1)

Publication Number Publication Date
WO2007004265A1 true WO2007004265A1 (fr) 2007-01-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2005/012115 Ceased WO2007004265A1 (fr) 2005-06-30 2005-06-30 Filtre, boîtier pour filtre, et procédé permettant d’assembler un filtre

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0615148A (ja) * 1992-07-06 1994-01-25 Ngk Insulators Ltd 濾過器及びセラミック膜フィルターのシール構造
JPH08506996A (ja) * 1993-02-24 1996-07-30 ポール・コーポレーション フィルタ組立体
JP2004261649A (ja) * 2003-02-21 2004-09-24 Ngk Insulators Ltd 濾過器、及びフィルタモジュール

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0615148A (ja) * 1992-07-06 1994-01-25 Ngk Insulators Ltd 濾過器及びセラミック膜フィルターのシール構造
JPH08506996A (ja) * 1993-02-24 1996-07-30 ポール・コーポレーション フィルタ組立体
JP2004261649A (ja) * 2003-02-21 2004-09-24 Ngk Insulators Ltd 濾過器、及びフィルタモジュール

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