WO2016199726A1 - Élément de membrane de séparation et dispositif de membrane de séparation - Google Patents

Élément de membrane de séparation et dispositif de membrane de séparation Download PDF

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Publication number
WO2016199726A1
WO2016199726A1 PCT/JP2016/066782 JP2016066782W WO2016199726A1 WO 2016199726 A1 WO2016199726 A1 WO 2016199726A1 JP 2016066782 W JP2016066782 W JP 2016066782W WO 2016199726 A1 WO2016199726 A1 WO 2016199726A1
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WO
WIPO (PCT)
Prior art keywords
separation membrane
sheet
separation
flow path
membrane
Prior art date
Application number
PCT/JP2016/066782
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English (en)
Japanese (ja)
Inventor
康弘 宇田
誠 小泓
友葉 岡▲崎▼
Original Assignee
日東電工株式会社
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Filing date
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Application filed by 日東電工株式会社 filed Critical 日東電工株式会社
Publication of WO2016199726A1 publication Critical patent/WO2016199726A1/fr

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    • 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
    • B01D63/08—Flat membrane modules
    • 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

Definitions

  • the present invention relates to a separation membrane element for separating a liquid or the like by a sheet-like separation membrane and a membrane separation apparatus using the same, and can be used for various membrane separation methods. It is useful as a separation membrane element used in the above.
  • Patent Document 2 a laminated membrane separation device in which two flow paths in a membrane leaf can flow linearly.
  • a plurality of cylindrical sheet-shaped separation membranes with a permeate-side flow path material inserted therein are stacked at intervals, and the cylindrical sheet-shaped separation membranes are opened on two sides.
  • a permeate discharge unit is provided, and the remaining two sides are provided with a stock solution supply unit and a concentrate discharge unit.
  • This structure of the membrane separation apparatus is convenient for reducing the pressure loss because the flow path is linear.
  • the membrane separation device described in Patent Document 2 does not take the form of a separation membrane element, and it is not assumed that a plurality of membrane separation devices are stacked. For this reason, the permeate discharge part and the like are connected to the separation part of the separation membrane by the flange structure, and there is a problem that the space efficiency is poor when a plurality of membrane separation devices are used in a laminated manner.
  • the flanges are provided at four locations on the separation membrane stack, and end caps are attached to each of them, which complicates the overall structure of the device and increases the number of parts, making it practical in terms of manufacturing costs. It was hard to say.
  • Such a problem of space efficiency and manufacturing cost of the separation membrane element is a problem that may occur not only in the forward osmosis membrane separation method but also in various membrane separation methods.
  • An object of the present invention is to provide a separation membrane element that can be easily manufactured with a small number of parts and that can be used by stacking a plurality of components, and a membrane separation device using the same. is there.
  • the separation membrane element of the present invention is A plurality of sheet-like separation membranes having four sides, a first flow path communicating from one end surface of both sides of the sheet-like separation membrane to one side of the sheet-like separation membrane disposed along two opposing sides of the sheet-like separation membrane; A laminated body having a second flow path communicating from the end faces on both sides arranged along the remaining two sides of the sheet-shaped separation membrane to the other surface of the sheet-shaped separation membrane; A housing that houses the laminate and has a side wall, a bottom surface, and a top surface; The housing has two first spaces communicating between the inner surface and the end surface of the laminate from both sides of the first flow path, and two second spaces communicating from both sides of the second flow path. A first liquid supply / discharge port provided in each of the first space portions, and a second liquid supply / discharge port provided in each of the second space portions. To do.
  • a housing having a side wall portion, a bottom surface portion, and an upper surface portion is accommodated with a laminated body in which a plurality of sheet-like separation membranes are laminated, and the first flow path is communicated from both sides. Since the first space portion and the two second space portions communicating with the second flow path from both sides are formed in the housing, members for forming the four space portions are not required individually. Further, since the housing is formed by the side wall portion, the bottom surface portion, and the top surface portion, the housings can be brought close to each other and stacked. As a result, it is possible to provide a separation membrane element that can be easily manufactured with a small number of components, and that can be used by stacking a plurality of components to improve space efficiency.
  • the housing accommodates a corner portion of the laminate close to the inner surface of the side wall portion, and an elastic body is interposed between the inner surface of the side wall portion and the corner portion of the laminate body.
  • an elastic body is interposed between the inner surface of the side wall portion and the corner portion of the laminate body.
  • the capacity of each laminate is increased while increasing the capacity of the laminate.
  • the space can be sealed with an elastic body.
  • the laminate includes a plurality of sheet-like separation membranes having four sides, a plurality of first flow passage materials arranged on the first flow passage side of the sheet-like separation membranes, and a second flow passage side of the sheet-like separation membranes.
  • the 2nd flow path material arrange
  • the side wall of the housing is preferably cylindrical. With such a structure, the four space portions can be formed in a well-balanced manner in the housing, and can be easily accommodated in a conventional cylindrical pressure vessel.
  • the supply / discharge port of the first liquid of the housing is provided in the bottom surface portion and the top surface portion, and the supply / discharge port of the second liquid is provided in the bottom surface portion and the top surface portion.
  • the membrane separation apparatus of the present invention is a membrane separation apparatus in which a plurality of the separation membrane elements described above are arranged in parallel. According to the membrane separation apparatus of the present invention, since a plurality of separation membrane elements having the above-described effects are arranged in parallel, it can be easily manufactured with a small number of parts, and space efficiency can be improved by using a plurality of layers. A membrane separation apparatus that can be enhanced can be provided.
  • the perspective view which shows an example of the separation membrane element of this invention The disassembled perspective view which shows an example of the separation membrane element of this invention.
  • the separation membrane element of the present invention accommodates a laminate 11 in which a plurality of sheet-like separation membranes 10 having four sides are laminated, the laminate 11, and includes a side wall portion 35 and a bottom portion. 36 and a housing 30 having an upper surface portion 37.
  • the laminate 11 includes a plurality of sheet-like separation membranes 10 having four sides, and the sheet-like separation from two end faces arranged along two opposite sides of the sheet-like separation membrane 10.
  • a first flow path P1 that communicates with one surface of the membrane 10 and a second channel that communicates with the other surface of the sheet-like separation membrane 10 from both end faces disposed along the remaining two sides of the sheet-like separation membrane 10.
  • a flow path P2 that communicates with one surface of the membrane 10 and a second channel that communicates with the other surface of the sheet-like separation membrane 10 from both end faces disposed along the remaining two sides of the sheet-like separation membrane 10.
  • a flow path P2 that communicates with one surface of the membrane 10 and a second channel that communicates with the other
  • the laminate 11 includes a plurality of sheet-like separation membranes 10 having four sides, a plurality of first flow passage members 13 arranged on the first flow passage side of the sheet-like separation membrane 10, and a second flow passage side.
  • An example including a plurality of arranged second flow path members 14 and a sealing portion 12 that prevents the first flow path and the second flow path from mixing with each other will be described.
  • Fig.3 (a) it is the sealing part 12 formed in the plate shape which has four sides, Comprising: On the one surface, the 1st flow-path material 13 is extended over the full length of two sides which oppose. The first channel recess 12d is disposed, and the other surface having the second channel recess 12e in which the second channel material 14 is disposed over the entire length of the other two opposite sides is used. Is preferred.
  • one of the first flow path or the second flow path is opened at the end faces of the two opposite sides, and the remaining two sides
  • the laminated body 11 in which the other of the first flow path or the second flow path opens can be formed on the end surface.
  • the sealing portions 12 arranged on both the uppermost and lowermost sides of the laminate 11 have a function as the outer wall plate 18.
  • an outer wall plate 18 may be additionally provided on both sides.
  • Such a sealing portion 12 can be manufactured as a resin molded body having the first flow path recess 12d and the second flow path recess 12e, but the first flow path material 13 and the second flow path material 14 are used. It is also possible to manufacture each of which is arranged integrally with the sealing portion 12. Further, the sheet-like separation membrane 10 can be integrally formed.
  • Examples of the resin constituting the sealing portion 12 include a thermosetting resin, a thermoplastic resin, and a heat resistant resin.
  • examples of the thermoplastic resin include ABS resin, vinyl chloride resin, polyethylene, polypropylene, polystyrene, acrylic resin, fluororesin, polyester, and polyamide.
  • examples of the heat resistant resin include polysulfone, polyethersulfone, aromatic polyimide, polyamide, and polyester.
  • examples of the thermosetting resin include epoxy resins, unsaturated polyester resins, phenol resins, amino resins, polyurethane resins, silicone resins, and thermosetting polyimide resins. Of these, thermoplastic resins such as ABS resin and vinyl chloride resin are preferably used. These resins can be appropriately selected depending on the type of separation membrane and the use of the element.
  • a laminate 11 is preferably formed by laminating a plurality of laminate units each including the sheet-like separation membrane 10, the first channel material 13, and the second channel material 14.
  • the number of lamination units in such a laminate 11 is, for example, 2 to 200, and preferably 20 to 100.
  • stacking unit of the sheet-like separation membrane 10 formed in the cylinder shape contains the sheet-like separation membrane 10 for two sheets, it calculates as a lamination
  • the sheet-like separation membrane 10 may be any of an ultrafiltration membrane, a nanofiltration membrane, a reverse osmosis membrane, a dialysis membrane, a forward osmosis membrane, etc.
  • the first liquid path and the second flow path This is particularly effective when the sheet-like separation membrane 10 is a forward osmosis membrane.
  • the sheet-like separation membrane 10 a material corresponding to the type of the membrane can be selected.
  • the porous support layer is a porous membrane formed of polysulfone, polyethersulfone, epoxy resin, polyamide, polyimide, or the like.
  • a nonwoven fabric formed of polyester, polyamide, polyolefin or the like is used.
  • the separation active layer examples include those formed of polyamide, cellulose acetate, polysulfone, polyethersulfone, vinylidene fluoride, polyacrylonitrile, polyvinyl chloride-polyacrylonitrile copolymer, epoxy resin, polyimide, polyvinyl alcohol, and the like. It is also possible to use a single-layer separation membrane formed of these materials.
  • the thickness of the sheet-like separation membrane 10 is preferably 0.01 to 1.0 mm, more preferably 0.02 to 0.3 mm.
  • a net made of resin or the like, a woven fabric, a knitted fabric, or the like is preferably used as the opening shape of the net.
  • a triangle, a quadrangle (rhombus, square, rectangle, parallelogram, etc.), a hexagon, or the like is used as the opening shape of the net. Is mentioned.
  • the first channel material 13 has a three-layer structure
  • the thickness of the net is, for example, 0.12 to 2 mm.
  • the net yarn diameter constituting the net is, for example, 0.06 to 1 mm.
  • the net aperture ratio is 70 to 95%.
  • Examples of the material of the first flow path material 13 include materials mainly composed of polypropylene, polyethylene, polysulfone, polytetrafluoroethylene, polyvinyl chloride, polyvinylidene fluoride, polyphenylene sulfide polyphenylene ether, polycarbonate, and nylon.
  • a net made of resin or the like, woven fabric, knitted fabric or the like is preferably used, and the opening shape of the net is a triangle, a quadrangle (such as a rhombus, a square, a rectangle, a parallelogram), a hexagon, or the like. Is mentioned.
  • the thickness of the net is, for example, 0.12 to 2 mm.
  • the net yarn diameter constituting the net is, for example, 0.06 to 1 mm.
  • the net aperture ratio is 70 to 95%.
  • Examples of the material of the second flow path material 14 include materials mainly composed of polypropylene, polyethylene, polysulfone, polytetrafluoroethylene, polyvinyl chloride, polyvinylidene fluoride, polyphenylene sulfide polyphenylene ether, polycarbonate, and nylon.
  • the size of the outer shape of the laminate 11 is, for example, a long side of 200 to 1000 mm, a short side of 200 to 1000 mm, and a height of about 20 to 200 mm.
  • the separation membrane element of the present invention includes a housing 30 that accommodates the laminate 11 as described above.
  • This housing 30 has a side wall portion 35, a bottom surface portion 36, and an upper surface portion 37 as shown in FIG. is doing.
  • the example in case the side wall part 35 of the housing 30 is cylindrical is shown.
  • resins such as vinyl chloride, polycarbonate, and polypropylene
  • fiber reinforced resins obtained by reinforcing various resins with fibers such as glass, metals such as aluminum and copper, ceramics, and the like can be used. Is most preferred.
  • the housing 30 is formed by integrally molding the side wall portion 35 and the bottom surface portion 36, and after housing the laminate 11, the upper surface portion 37 is bonded, welded, or the like to join the supply / discharge ports 23a to 24b.
  • the part other than can be made into a liquid-tight structure.
  • Two second spaces 22a and 22b are provided.
  • the separation membrane element is used, the first liquid and the second liquid are filled in the first space 21a and 21b and the second space 22a and 22b, respectively, as necessary.
  • the housing 30 may be of a size that can accommodate the laminate 11, but the effective membrane area can be reduced by making the corner of the laminate 11 close to the inner surface of the side wall portion 35. It is preferable from the viewpoint of easily sealing the corner while increasing the number. In that case, the inner surface of the side wall portion 35 and the corner portion of the laminated body 11 can be sealed with a sealing resin, but an elastic body (not shown) is interposed between the two and adjacent to each other. The space portions may be sealed.
  • a method of sealing the bottom surface and the bottom surface portion 36 of the laminated body 11 by adhesion, or a method of sealing using a sealing material made of an elastic body can be mentioned.
  • the sealing between the upper surface of the laminated body 11 and the upper surface portion 37 can be similarly performed.
  • the elastic body rubber, thermoplastic elastomer or the like can be used, and the cross-sectional shape is preferably L-shaped or U-shaped so that it can be easily circumscribed on the corner of the laminate 11. Moreover, it is also possible to use an elastic body having a shape that circumscribes all the sides (12 sides) of the laminate 11. Thereby, a seal
  • the housing 30 in the present invention includes a first liquid supply / discharge port 23a, 23b provided in each of the first space portions 21a, 21b and a second liquid supply / discharge port provided in each of the second space portions 22a, 22b. 24a, 24b.
  • the first liquid supply / discharge ports 23 a and 23 b of the housing 30 are provided in the bottom surface portion 36 and the top surface portion 37
  • the second liquid supply and discharge ports 24 a and 24 b are provided in the bottom surface portion 36 and the top surface portion 37.
  • These supply / discharge ports 23a to 24b can supply and discharge the liquid using a connected pipe.
  • the first space portions 21a and 21b and the second space portions 22a and 22b are provided with two upper and lower supply / discharge ports 23a to 24b.
  • the upper and lower supply / discharge ports 23a to 24b which are provided at the top and bottom, as shown in FIG. FIG. 4 shows an example in which a single separation membrane element is used.
  • the plug 32 is used to block part of the supply / discharge ports 23a to 24b.
  • the plug 32 retains the O-ring 32 a and the like on the outer peripheral surface, thereby ensuring liquid tightness with the bottom surface portion 36 or the top surface portion 37 of the housing 30.
  • the connection member 31 that holds the O-ring 31a and the like on the outer peripheral surface is inserted into the bottom surface portion 36 or the top surface portion 37, thereby ensuring the liquid tightness of the housing 30 when piping.
  • the pressure resistance of the separation membrane element is improved by sandwiching the laminated body 11 with the upper and lower reinforcing plates 41 and 42 and fastening the peripheral portion with bolts 43 or the like.
  • a reinforcing plate include metals such as stainless steel and aluminum, and fiber reinforced resins.
  • a pipe for supplying and discharging the first liquid or the second liquid is connected to the supply / discharge ports 23a to 24b via a connection member 31 as necessary.
  • a low-concentration liquid for example, fresh water FW, liquid to be treated FS, etc.
  • the high concentration liquid for example, seawater SW, draw solution DS, etc.
  • the element can be used for forward osmosis membrane separation.
  • the raw liquid is supplied from the supply / discharge port 24a and the permeate separated by the separation membrane is discharged from the supply / discharge port 23b while discharging the concentrate from the supply / discharge port 24b. It becomes possible to do. At this time, it is also possible to perform membrane separation while supplying the sweep flow from the supply / discharge port 23a.
  • a first flow path material 13 and two sheet-like separation membranes 10 are prepared.
  • the first flow path members 13 can be disposed between the porous support layers facing each other. .
  • the two opposite sides of the two sheet-like separation membranes 10 are sealed, and the first flow path material 13 is inserted into the tubular sheet-like separation membrane 10.
  • the sealing of the two sides can be performed by adhesion using an adhesive or heat fusion. It is possible to use a cylindrical sheet-shaped separation membrane 10 that is formed in a cylindrical shape from the beginning, and fold one sheet-shaped separation membrane 10 in half to seal one end. You may produce by doing.
  • a plurality of cylindrical sheet-like separation membranes 10 with the first flow path members 13 inserted therein and a plurality of second flow path members 14 are alternately stacked. While forming the body 11, the outer wall board 18 is arrange
  • the end portion of the laminate 11 and the outer wall plate 18 is cast or the like to form the sealing portion 12, thereby obtaining the main body portion of the separation membrane element.
  • casting is performed with the opening of the tubular sheet-shaped separation membrane 10 being opened, or the temporary opening is sealed by casting, and then the casting is subjected to processing such as cutting.
  • the conditions for solidifying the resin can be determined according to the resin used.
  • the sheet-like separation membrane 10 has a separation active layer and a porous support layer, and the first flow path member 13 is separated on the porous support layer side.
  • the second flow path member 14 is disposed on the active layer side.
  • the laminated body 11 is provided with the sealing part 12 and the outer wall board 18 which prevent that a 1st flow path and a 2nd flow path mix, and the edge part (2 side which the sheet-like separation membrane 10 opposes ( 5D, at least the sheet-like separation membrane 10 is bonded with an adhesive resin, and the first flow path has a sealing portion 12 that opens to the end surface.
  • the first flow path material 13 extends to the opening end of the first flow path.
  • resin As the material of the outer wall plate 18, resin, fiber reinforced resin, ceramics, metal, or the like can be used according to the working pressure of the separation membrane element.
  • the shape of the housing 30 in a plan view may be any.
  • the shape of the housing 30 in plan view may be a polygon such as a square, a rhombus, or a hexagon.
  • the membrane separation apparatus of the present invention is characterized in that a plurality of the separation membrane elements E of the present invention described above are arranged in parallel (including the case where they are stacked). At this time, as shown in FIGS. 7 to 8, a plurality of separation membrane elements E are arranged side by side with the bottom surface portion 36 and the top surface portion 37 approaching each other, and the first liquid supply / discharge ports 23a, 23b and The two liquid supply / discharge ports 24 a and 24 b are preferably connected to each other by a connector 33. By connecting in this way, each separation membrane element E can be connected in parallel.
  • the connector 33 has a flange portion with an enlarged diameter at the middle portion, and holds O-rings 33a and the like on the outer circumferences on both sides thereof. Thereby, the liquid-tightness of the connection between the separation membrane elements E is maintained. Further, in order to prevent a gap from being formed between the separation membrane elements E due to the interposition of the flange portion of the connector 33, the supply / discharge ports 23a to 24b of the bottom surface portion 36 and the top surface portion 37 of the separation membrane element E are provided. A counterbore is preferably formed around the periphery.
  • the housing 30 of the plurality of separation membrane elements E is cylindrical, By laminating and connecting in the same manner as in FIG. 7, it is possible to provide a membrane separation apparatus accommodated in a cylindrical container.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

L'objectif de la présente invention est de fournir: un élément de membrane de séparation qui peut être produit de manière simple avec un petit nombre d'éléments et qui permet une augmentation de l'efficacité spatiale par la stratification d'une pluralité desdits éléments; et un dispositif de séparation à membrane qui utilise ledit élément de membrane de séparation. Ce dispositif de séparation à membrane est doté d'un stratifié (11) formé par la stratification d'une pluralité de membranes de séparation stratiformes quadrilatérales (10) et d'un boîtier (30) qui reçoit ledit stratifié (11). Le stratifié (11) est formé par la stratification d'une pluralité de membranes de séparation stratiformes (10) et comprend: un premier canal (P1) qui communique à partir des deux surfaces d'extrémité, qui sont disposées le long de deux côtés opposés des membranes de séparation stratiformes (10), avec une surface des membranes de séparation stratiformes (10); et un second canal (P2) qui communique à partir des deux surfaces d'extrémité, qui sont disposées le long des deux côtés restants des membranes de séparation stratiformes (10), avec l'autre surface des membranes de séparation stratiformes (10). Entre la surface interne du boîtier (30) et la surface d'extrémité du stratifié (11) se trouvent deux premières parties d'espace (21a, 21b) qui communiquent avec le premier canal (P1) à partir des deux côtés et deux secondes parties d'espace (22a, 22b) qui communiquent avec le second canal (P2) à partir des deux côtés.
PCT/JP2016/066782 2015-06-11 2016-06-06 Élément de membrane de séparation et dispositif de membrane de séparation WO2016199726A1 (fr)

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JP2015-118245 2015-06-11
JP2015118245A JP2017000964A (ja) 2015-06-11 2015-06-11 分離膜エレメント及び膜分離装置

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020099865A (ja) * 2018-12-21 2020-07-02 国立大学法人高知大学 排水処理装置、膜エレメント及び排水処理方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06277461A (ja) * 1993-03-26 1994-10-04 Kurita Water Ind Ltd 膜分離装置
WO1995006514A1 (fr) * 1993-09-02 1995-03-09 The Dow Chemical Company Module a membrane de separation
DE102008020291A1 (de) * 2008-04-22 2009-11-05 Follmann, Peter Michael, Dipl.-Ing. Herstellungsverfahren für integrierte Membranmodule durch in-situ-Grenzflächenpolymerisation an strukturierten Kontaktflächen nach Zusammenbau des Moduls
WO2014092725A1 (fr) * 2012-12-14 2014-06-19 General Electric Company Module de filtration à empilement de membranes

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101952458B1 (ko) * 2010-11-12 2019-02-26 에보쿠아 워터 테크놀로지스 피티이. 리미티드 전기화학적 분리 시스템들 및 방법들에서 전류 효율성을 촉진시키기 위한 기술들

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06277461A (ja) * 1993-03-26 1994-10-04 Kurita Water Ind Ltd 膜分離装置
WO1995006514A1 (fr) * 1993-09-02 1995-03-09 The Dow Chemical Company Module a membrane de separation
DE102008020291A1 (de) * 2008-04-22 2009-11-05 Follmann, Peter Michael, Dipl.-Ing. Herstellungsverfahren für integrierte Membranmodule durch in-situ-Grenzflächenpolymerisation an strukturierten Kontaktflächen nach Zusammenbau des Moduls
WO2014092725A1 (fr) * 2012-12-14 2014-06-19 General Electric Company Module de filtration à empilement de membranes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020099865A (ja) * 2018-12-21 2020-07-02 国立大学法人高知大学 排水処理装置、膜エレメント及び排水処理方法
JP7216542B2 (ja) 2018-12-21 2023-02-01 国立大学法人高知大学 排水処理装置、膜エレメント及び排水処理方法

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