WO2011158518A1 - スパイラル型分離膜エレメント、有孔中空管およびその製造方法 - Google Patents
スパイラル型分離膜エレメント、有孔中空管およびその製造方法 Download PDFInfo
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- WO2011158518A1 WO2011158518A1 PCT/JP2011/003485 JP2011003485W WO2011158518A1 WO 2011158518 A1 WO2011158518 A1 WO 2011158518A1 JP 2011003485 W JP2011003485 W JP 2011003485W WO 2011158518 A1 WO2011158518 A1 WO 2011158518A1
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- WIPO (PCT)
- Prior art keywords
- hollow tube
- perforated hollow
- separation membrane
- peripheral surface
- membrane element
- Prior art date
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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
- B01D63/10—Spiral-wound membrane modules
- B01D63/107—Specific properties of the central tube or the permeate channel
-
- 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
- B01D63/101—Spiral winding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/42—Moulds or cores; Details thereof or accessories therefor characterised by the shape of the moulding surface, e.g. ribs or grooves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/261—Moulds having tubular mould cavities
- B29C45/2612—Moulds having tubular mould cavities for manufacturing tubular articles with an annular groove
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2628—Moulds with mould parts forming holes in or through the moulded article, e.g. for bearing cages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/44—Removing or ejecting moulded articles for undercut articles
- B29C45/4421—Removing or ejecting moulded articles for undercut articles using expansible or collapsible cores
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
- B29C33/48—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling
- B29C33/485—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling cores or mandrels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
Definitions
- the present invention relates to a spiral type separation membrane element.
- the present invention also relates to a perforated hollow tube that can be used in the spiral separation membrane element and a method for producing the perforated hollow tube.
- the perforated hollow tube having a plurality of through holes connected from the outer peripheral surface to the inner peripheral surface can be used, for example, as a central tube of a spiral separation membrane element used for drainage purification or seawater desalination.
- a spiral type separation membrane element used for drainage purification or seawater desalination.
- a reverse osmosis membrane, a precision leakage membrane, and an ultrafiltration membrane are used as a separation membrane and put into practical use.
- demand for this spiral type separation membrane element has increased, and the required separation performance has been significantly improved. Not only the performance of the separation membrane, but also the separation membrane element as a whole, the pressure loss in the element has been reduced. Improvements in performance are being studied.
- the central tube the open area ratio of the through hole (for example, see Patent Document 1) and the structure of the inner peripheral surface of the central tube (for example, see Patent Document 2) have been studied. There is a need for further performance improvements.
- JP 2004-305823 A Japanese Patent Laid-Open No. 2007-111474
- the present invention relates to a perforated hollow tube having a plurality of through-holes connected from an outer peripheral surface to an inner peripheral surface, and a laminate including a separation membrane and a flow path member wound around the perforated hollow tube. And a spiral separation membrane element provided with a non-penetrating recess in a region covered with the laminate on the outer peripheral surface of the perforated hollow tube.
- the present invention is a perforated hollow tube having a plurality of through holes connected from the outer peripheral surface to the inner peripheral surface, and a non-penetrating recess is provided on the outer peripheral surface, Provided is a perforated hollow tube in which the plurality of through holes are open.
- the present invention is a method for producing the perforated hollow tube by an injection molding method, wherein a core mold that forms an inner space of the perforated hollow tube and the core mold are accommodated.
- a method for manufacturing a perforated hollow tube in which a resin is injected into a mold including a convex part that forms a non-penetrating concave part and a main mold having a boss that forms the plurality of through holes.
- the permeate since the permeate flows into the non-penetrating recess, the permeate can flow smoothly in the non-penetrating recess, and the resistance applied to the permeate can be reduced. Thereby, pressure loss can be reduced and the amount of permeate can be increased.
- FIG. 3A is a perspective view of the laminate before being wound around the perforated hollow tube
- FIG. 3B is a schematic cross-sectional view of the laminate wound around the perforated hollow tube
- 4A is a cross-sectional view of a mold for producing the perforated hollow tube shown in FIG. 1
- FIG. 4B is a cross-sectional view showing an example in which the perforated hollow tube is divided into a plurality of pieces in the axial direction.
- FIG. 1st modification The perspective view which shows the perforated hollow tube of a 1st modification.
- FIG. 6A is a side view showing a perforated hollow tube of a second modification
- FIG. 6B is a cross-sectional view of the perforated hollow tube.
- FIG. 7A is a side view showing a perforated hollow tube of a third modification
- FIG. 7B is a cross-sectional view of the perforated hollow tube.
- 8A to 8C are side views showing perforated hollow tubes of fourth to sixth modifications, respectively.
- FIG. 9A is a side view showing a perforated hollow tube of a seventh modification
- FIG. 9B is a cross-sectional view of the perforated hollow tube.
- FIG. 10A is a side view showing a perforated hollow tube of an eighth modification
- FIG. 10B is a cross-sectional view of the perforated hollow tube.
- FIG. 1 shows a perforated hollow tube 1 used in a spiral separation membrane element according to an embodiment of the present invention.
- This perforated hollow tube 1 has a plurality of through-holes 2 connected from the outer peripheral surface to the inner peripheral surface.
- the material of the perforated hollow tube 1 is not particularly limited, but the perforated hollow tube 1 is preferably a rigid body having no flexibility. For example, those made of metal, resin, or ceramic are preferably used.
- metal for example, iron, aluminum, stainless steel, copper, brass (true weave), bronze, duralumin, or an alloy having two or more metal elements can be used. From the viewpoint of corrosion resistance, it is preferable to use stainless steel.
- thermosetting resin examples include epoxy resin, phenol resin, melamine resin, urea resin (urea resin), alkyd resin, unsaturated polyester resin, polyurethane, thermosetting polyimide, silicone resin, and diallyl phthalate resin. .
- the thermoplastic resin examples include polyethylene resin, polystyrene resin, polypropylene resin, polycarbonate resin, polyacetal resin, polyamide resin, polysulfone resin, polyester resin (for example, polyethylene terephthalate resin and polybutylene terephthalate resin), and modified polyphenylene oxide resin.
- modified polyphenylene ether resin polyphenylene sulfide resin, acrylonitrile-butadiene-styrene copolymer resin, acrylonitrile-styrene copolymer resin, polymethyl methacrylate resin, or a mixture or polymer alloy thereof.
- a fiber material such as glass fiber or carbon fiber, or a crystalline material such as whisker or liquid crystal polymer may be added to the resin composition.
- the glass fiber include glass wool, chopped glass fiber, and milled glass fiber.
- the carbon fiber include milled carbon fiber.
- the whisker include aluminum borate whisker, potassium titanate whisker, basic magnesium sulfate whisker, calcium silicate whisker, and calcium sulfate whisker.
- additives may be added for the purpose of improving resin properties.
- flame retardants, stabilizers, pigments, dyes, mold release materials, lubricants, weather resistance improvers and the like may be added to the resin composition.
- additives may be used alone, but can be used as a mixture of two or more.
- the number and size of the through holes 2 provided in the perforated hollow tube 1 may be set as appropriate.
- the outer diameter of the perforated hollow tube 1 is a spiral separation membrane element having a diameter of about 8 inches. In the case of about ⁇ 40 mm, the diameter of the through hole 2 is about 2 to 8 mm, and the number of the through holes 2 is preferably about 50 to 200.
- the through holes 2 are preferably arranged on at least one line extending in the axial direction of the perforated hollow tube 2. In this embodiment, as shown in FIGS. 2 and 3B, the through holes 2 are arranged in two rows so as to be positioned 180 degrees opposite to the central axis of the perforated hollow tube 2.
- a non-penetrating recess 3 is provided on the outer peripheral surface of the perforated hollow tube 1 so that the through-hole 2 opens at the bottom of the non-penetrating recess 3.
- This non-penetrating recess 3 has an effect of smoothly introducing the permeate into the through hole 2 and is therefore considered to exert an effect of reducing the pressure loss in the element.
- the non-penetrating recess 3 refers to a portion that reduces the thickness of the perforated hollow tube 1.
- the non-penetrating recess 3 is composed of a coupling groove 31, a parallel groove 32, and a connection groove 33, and a non-penetrating recess 3 secures a flow path for the permeate.
- the depth and width of the grooves 31 to 33 are not particularly limited. For example, when the outer diameter of the perforated hollow tube 1 is about 30 to 40 mm in a spiral separation membrane element having a diameter of about 8 inches.
- the depth of the grooves 31 to 33 is, for example, about 0.5 mm to 2 mm, and the width of the grooves 31 to 33 is, for example, about 1 mm to 3 mm.
- the connecting groove 31 connects the through holes 2 for each line in which the through holes 2 are arranged.
- the connecting groove 31 preferably extends in the axial direction of the perforated hollow tube 1 so as to be parallel to the fluid flow direction of the spiral separation membrane element. With this structure, the permeated liquid can be linearly guided by the connecting groove 31, so that the pressure loss reduction effect in the element can be further enhanced.
- Each connection groove 31 may be provided continuously, but may be provided intermittently intentionally.
- the parallel groove 32 is parallel to the connecting groove 31 and divides the outer peripheral surface of the perforated hollow tube 1 together with the connecting groove 31 in the circumferential direction.
- the connecting groove 31 and the parallel groove 32 are arranged at equiangular intervals.
- the connection groove 33 connects the connection groove 31 and the parallel groove 32.
- connection grooves 33 and the extending direction are not particularly limited, and may be appropriately determined according to the moving direction of the permeated liquid.
- the connection groove 33 extending in the circumferential direction may be disposed so as to pass through the centers of all the adjacent through holes 2.
- each of the grooves 31 to 33 is not particularly limited, and can be appropriately designed such as a square shape, a U shape, a V shape, a semicircular shape, or a stepped side surface.
- the bottom corner is rounded (R-processed) with a radius of about 0.5 mm to 2 mm.
- the range in which the non-penetrating recess 3 is provided in the axial direction of the perforated hollow tube 1 is a non-penetrating recess in a region covered with a laminate 8 (see FIG. 3A) described later on the outer peripheral surface of the perforated hollow tube 1. 3 is preferably not reached at both ends of the perforated hollow tube 1.
- the separation membrane in the spiral type separation membrane element generally has a structure that is folded in half and sealed on three sides. At the end of the perforated hollow tube 1, the vicinity of this sealed portion is the same as the hollow tube. It is glued. If the non-penetrating recess 3 overlaps with the bonded portion, the permeate may leak out, and the separation efficiency may deteriorate. Therefore, a structure in which the non-penetrating recess 3 is not formed in the portion where the sealing portion of the separation membrane is in contact with the perforated hollow tube 1 can be particularly preferably used.
- the perforated hollow tube 1 constitutes a spiral separation membrane element by winding a laminated body 8 around the perforated hollow tube 1 in a spiral shape.
- the laminated body 8 is formed in an envelope shape (bag shape) by superposing separation membranes 6 on both surfaces of a permeation-side flow path material 5 made of a synthetic resin net and bonding three sides.
- the formed membrane leaf 7 and the supply-side channel material 4 made of a synthetic resin net are alternately laminated.
- the permeate-side channel material 5 forms a permeate-side channel 8B for allowing the permeate to flow between the separation membranes 6, and the supply-side channel material 4 allows the supply liquid to flow between the membrane leaves 7.
- the supply-side flow path 8A is formed.
- the opening of the membrane leaf 7 is attached to the perforated hollow tube 1.
- two continuous separation membranes 6 are formed by folding one continuous sheet 60 into two with the supply-side flow path member 4 interposed therebetween.
- the membrane leaf 7 is obtained by joining the separation membranes 7 formed in this way at three sides with the permeation-side channel material 5 interposed therebetween. An adhesive is used for this joining.
- an extended portion obtained by extending one piece of the permeate-side flow path member 5 is directly wound around the perforated hollow tube 1 and both ends thereof are sealed with an adhesive, whereby a perforated hollow tube A cylindrical channel 8 ⁇ / b> C facing the outer peripheral surface of 1 is formed.
- the opening of the membrane leaf 7 communicates with the through hole 2 via the cylindrical flow path 8C.
- the configuration of the stacked body 8 is not limited to the configuration shown in FIGS. 3A and 3B.
- all the separation membranes 6 may be connected by folding a continuous sheet into a bellows shape.
- the separation membrane 6 has a structure in which, for example, a porous support and a skin layer (separation function layer) are sequentially laminated on a nonwoven fabric layer. It does not specifically limit as a constituent material of a nonwoven fabric layer, A conventionally well-known thing is employable.
- Conventionally known materials can be used as the constituent material of the porous support.
- examples thereof include polyaryl ether sulfones such as polysulfone and polyether sulfone, polyimide, polyvinylidene fluoride, and epoxy.
- the skin layer does not exhibit permeability to the separation target substance contained in the supply liquid and has a separation function.
- the material constituting the skin layer is not particularly limited, and conventionally known materials can be used. Specifically, polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), nylon And polyamide, polyacrylonitrile (PAN), polyvinyl alcohol (PVA), PMMA, polysulfone, polyethersulfone, polyimide, ethylene-vinyl alcohol copolymer, and the like.
- the supply-side flow path material 4 may be a conventionally known material such as a net-like material, a mesh-like material, a grooved sheet, or a corrugated sheet.
- a conventionally known material such as a net-like material, a knitted material, a mesh-like material, a grooved sheet, and a corrugated sheet can be used.
- the manufacturing method of the perforated hollow tube 1 is not particularly limited, and a conventionally known method can be used. For example, by a method of drilling and cutting grooves in a resin hollow tube or metal hollow tube obtained by an extrusion molding method, or by a die cutting process using a mold such as an injection molding method A method of subjecting the obtained resin or ceramic perforated hollow tube to a cutting groove process may be mentioned. Among others, the present inventors have found a method for producing the perforated hollow tube 1 efficiently and with high productivity. The method is a method of manufacturing the perforated hollow tube 1 by an injection molding method in which a resin is injected into a mold and cured. An example of this formwork is shown in FIG. 4A.
- the 4A includes a core mold 12, a main mold 11 that accommodates the core mold 12, and an auxiliary member 18 that fixes the core mold 12 to the main mold 11.
- a molding chamber 13 is formed between the core mold 12 and the main mold 11.
- the core mold 12 forms an internal space of the perforated hollow tube 1.
- the main mold 11 has a convex portion 16 that forms the non-penetrating concave portion 3 and a boss 17 that forms the through hole 2.
- the main mold 11 can be divided in a direction perpendicular to the axial direction of the perforated hollow tube 1 and is composed of a pair of main parts 11A and 11B that are fastened in contact with each other.
- a resin injection port 14 is provided in each main part 11A, 11B.
- the core mold 12 can be divided in the axial direction of the perforated hollow tube 1 and is composed of a pair of core parts 12A and 12B fixed to the main mold 11 in contact with each other.
- the perforated hollow tube 1 does not necessarily need to be integrally injection-molded as a whole.
- the perforated hollow tube 1 is divided into a plurality of pieces 1A, 1B in the axial direction (two in the example, but may be three or more), and each piece 1A, It is also possible to manufacture the perforated hollow tube 1 by injection-molding 1B using a mold as shown in FIG. 4A and joining the pieces 1A and 1B.
- the joining method in this case is not particularly limited, and a known technique such as resin adhesion, heat fusion, ultrasonic fusion, or rotational friction fusion can be used as appropriate.
- the non-penetrating recess 3 is not limited to the configuration described above, and various modifications are possible.
- the non-penetrating recess 3 may be composed of only the connecting groove 31 and the parallel groove 32.
- the non-penetrating recess 3 may include only the parallel grooves 32 that do not include the connection groove 31 and are arranged at equal angular intervals. That is, the plurality of through holes 2 do not have to open to the bottom of the non-through recess 3.
- the permeated liquid that has flowed into any of the parallel grooves 32 passes through the permeate-side flow path material 5 along the outer peripheral surface of the perforated hollow tube 1 to the through-hole 2 by the shortest route.
- the flow resistance of the permeate can be lowered to some extent.
- the non-penetrating recess 3 functions as a flow path that guides the permeate to the through-hole 2, so that the flow resistance of the permeate can be greatly reduced. .
- connection groove 31 does not necessarily extend in the axial direction of the perforated hollow tube 1 and meanders so as to wave at a wavelength twice the pitch of the through holes 2 as shown in FIGS. 7A and 7B. You may do it. Or although illustration is abbreviate
- the non-penetrating recess 3 is only a meandering groove 34 in which the connecting groove 31 shown in FIG. 7A is displaced in the axial direction of the perforated hollow tube 1 by half the pitch of the through hole 2. It may be configured.
- a connecting groove 31 undulating at a wavelength twice the pitch of the through-holes 2 is provided symmetrically with respect to the line in which the through-holes 2 are arranged, and these can be crossed on the through-holes 2. Good.
- the connecting groove 31 undulates the waveform does not need to draw a smooth curve, and may be an angular wave as shown in FIG. 8C.
- the non-penetrating recess 3 may be constituted by individual depressions 35 provided corresponding to the respective through holes 2 as shown in FIGS. 9A and 9B.
- each individual recess 35 includes a cross-shaped groove and a concentric groove.
- the bottom surface of the individual recess 35 may be a curved surface parallel to the outer peripheral surface of the perforated hollow tube 1 or a plane orthogonal to the axial direction of the through hole 2.
- the non-penetrating recess 3 may have a configuration as shown in FIGS. 10A and 10B.
- a connecting groove 31 extending in the axial direction of the perforated hollow tube 1 is provided on the outer peripheral surface of the perforated hollow tube 1, and a circumferential groove 36 extending from each through hole 21 to both sides is provided.
- a thin lattice groove is provided so as to form dots 37 arranged in a matrix.
- the shape of the dot 37 is not necessarily a square, and may be another shape such as a circle.
- channel 32 are not provided, and the non-penetrating recessed part 3 may be comprised only by the lattice groove
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- Chemical & Material Sciences (AREA)
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- Separation Using Semi-Permeable Membranes (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
非貫通凹部3は、上述した構成のものに限られず、種々の変形が可能である。例えば、図5に示すように、非貫通凹部3は、連結溝31および平行溝32だけで構成されていてもよい。また、非貫通凹部3は、図6Aおよび図6Bに示すように、連結溝31を含まず、等角度間隔で配置された平行溝32のみで構成されていてもよい。すなわち、複数の貫通孔2は、非貫通凹部3の底に開口していなくてもよい。この構成では、いずれかの平行溝32内に流入した透過液が有孔中空管1の外周面に沿って透過側流路材5を貫通孔2まで最短ルートで通過するようになるため、この構成でも透過液の流動抵抗をある程度下げることができる。ただし、非貫通凹部3の底に貫通孔2が開口していれば、非貫通凹部3が貫通孔2に透過液を導く流路として機能するため、透過液の流動抵抗を大きく下げることができる。
2 貫通孔
3 非貫通凹部
31 連結溝
32 平行溝
33 接続溝
36 個別窪み
4 供給側流路材
5 透過側流路材
6 分離膜
7 膜リーフ
8 積層体
11 主型
12 中子型
13 成形室
14 樹脂注入口
16 凸部
17 ボス
18 中子型固定補助部材
A 流体の流れ方向
B 主型取り外し方向
Claims (15)
- 外周面から内周面につながる複数の貫通孔を有する有孔中空管と、
前記有孔中空管の周囲に巻回された、分離膜および流路材を含む積層体と、を備え、
前記有孔中空管の外周面における前記積層体で覆われる領域には非貫通凹部が設けられている、スパイラル型分離膜エレメント。 - 前記複数の貫通孔が前記非貫通凹部の底に開口している、請求項1に記載のスパイラル型分離膜エレメント。
- 前記複数の貫通孔が前記有孔中空管の軸方向に延びる少なくとも1本の線上に並んでおり、
前記非貫通凹部は、前記線ごとに前記貫通孔を連結する連結溝を含む、請求項2に記載のスパイラル型分離膜エレメント。 - 前記連結溝が前記有孔中空管の軸方向に延びている、請求項3に記載のスパイラル型分離膜エレメント。
- 前記非貫通凹部は、前記連結溝と共に前記外周面を周方向に分割する複数の平行溝を含む、請求項4に記載のスパイラル型分離膜エレメント。
- 前記非貫通凹部は、前記連結溝と前記複数の平行溝とを接続する接続溝を含む、請求項5に記載のスパイラル型分離膜エレメント。
- 前記非貫通凹部は、前記複数の貫通孔のそれぞれに対応して設けられた個別窪みで構成されている、請求項2に記載のスパイラル型分離膜エレメント。
- 外周面から内周面につながる複数の貫通孔を有する有孔中空管であって、
前記外周面には非貫通凹部が設けられており、この非貫通凹部の底に前記複数の貫通孔が開口している、有孔中空管。 - 前記複数の貫通孔が前記有孔中空管の軸方向に延びる少なくとも1本の線上に並んでおり、
前記非貫通凹部は、前記線ごとに前記貫通孔を連結する連結溝を含む、請求項8に記載の有孔中空管。 - 前記連結溝が前記有孔中空管の軸方向に延びている、請求項9に記載の有孔中空管。
- 前記非貫通凹部は、前記連結溝と共に前記外周面を周方向に分割する複数の平行溝を含む、請求項10に記載の有孔中空管。
- 前記非貫通凹部は、前記連結溝と前記複数の平行溝とを接続する接続溝を含む、請求項11に記載の有孔中空管。
- 前記連結溝の底隅部に半径0.5mm以上2mm以下の角丸め加工がなされている、請求項9~12のいずれか一項に記載の有孔中空管。
- 前記有孔中空管の軸方向において、前記非貫通凹部が設けられた範囲が前記有孔中空管の両端部まで達していない、請求項8~13のいずれか一項に記載の有孔中空管。
- 請求項8~14のいずれか一項に記載の有孔中空管を射出成形法により製造する方法であって、
前記有孔中空管の内部空間を形成する中子型と、前記中子型を収容する、前記非貫通凹部を形成する凸部および前記複数の貫通孔を形成するボスを有する主型と、を含む型枠内に樹脂を注入して硬化させる、有孔中空管の製造方法。
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KR1020137001236A KR101477433B1 (ko) | 2010-06-18 | 2011-06-17 | 나선형 분리막 엘리먼트, 구멍이 있는 중공관 및 그의 제조 방법 |
US13/704,476 US20130087499A1 (en) | 2010-06-18 | 2011-06-17 | Spiral separation membrane element, perforated hollow tube, and method of producing the same |
CN2011800301412A CN102946978A (zh) | 2010-06-18 | 2011-06-17 | 螺旋型分离膜元件、有孔中空管及其制造方法 |
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WO2023008220A1 (ja) * | 2021-07-28 | 2023-02-02 | 日東電工株式会社 | スパイラル型膜エレメント及び膜分離システム |
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US9452390B2 (en) | 2008-09-29 | 2016-09-27 | Scott P. Yaeger | Spiral crossflow filter |
CN105473212B (zh) * | 2013-05-17 | 2018-06-22 | 斯科特.P.耶格尔 | 螺旋错流过滤器 |
JP6001013B2 (ja) * | 2013-08-13 | 2016-10-05 | 富士フイルム株式会社 | 酸性ガス分離用スパイラル型モジュール |
KR101584052B1 (ko) * | 2014-04-21 | 2016-01-20 | 주식회사 피코그램 | 유로가 측면에 형성되는 역삼투막 필터 |
CN107848895B (zh) | 2015-07-21 | 2021-04-09 | 日本轻金属株式会社 | 氟化镁烧结体、氟化镁烧结体的制造方法、中子减速剂和中子减速剂的制造方法 |
JP7037306B2 (ja) | 2016-09-16 | 2022-03-16 | 日東電工株式会社 | スパイラル型膜エレメント |
US20240149221A1 (en) * | 2021-03-09 | 2024-05-09 | Nitto Denko Corporation | Spiral membrane element and membrane separation system |
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KR20130031340A (ko) | 2013-03-28 |
US20130087499A1 (en) | 2013-04-11 |
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