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WO2020262290A1 - Élément de membrane de séparation, son procédé d'utilisation et dispositif de traitement d'eau - Google Patents

Élément de membrane de séparation, son procédé d'utilisation et dispositif de traitement d'eau Download PDF

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Publication number
WO2020262290A1
WO2020262290A1 PCT/JP2020/024361 JP2020024361W WO2020262290A1 WO 2020262290 A1 WO2020262290 A1 WO 2020262290A1 JP 2020024361 W JP2020024361 W JP 2020024361W WO 2020262290 A1 WO2020262290 A1 WO 2020262290A1
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WIPO (PCT)
Prior art keywords
separation membrane
supply
face
flow path
side surfaces
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/JP2020/024361
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English (en)
Japanese (ja)
Inventor
吉冨慎一郎
ガルグアクシャイ
高木健太朗
花田茂久
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.)
Toray Industries Inc
Original Assignee
Toray Industries Inc
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 Toray Industries Inc filed Critical Toray Industries Inc
Priority to CN202080046566.1A priority Critical patent/CN114025866B/zh
Priority to KR1020217033343A priority patent/KR102617616B1/ko
Priority to JP2020537677A priority patent/JP6973650B2/ja
Publication of WO2020262290A1 publication Critical patent/WO2020262290A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B01D63/10—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
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • 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
    • 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
    • B01D63/12—Spiral-wound membrane modules comprising multiple spiral-wound assemblies
    • 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
    • B01D65/003—Membrane bonding or sealing
    • 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
    • B01D65/08—Prevention of membrane fouling or of concentration polarisation
    • 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
    • B01D69/12—Composite membranes; Ultra-thin membranes
    • B01D69/1213—Laminated layers
    • 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
    • B01D69/12—Composite membranes; Ultra-thin membranes
    • B01D69/1216—Three or more layers
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B01D2313/04—Specific sealing means
    • B01D2313/042—Adhesives or glues
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B01D2313/10—Specific supply elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B01D2313/12—Specific discharge elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B01D2313/14—Specific spacers
    • B01D2313/143—Specific spacers on the feed side
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B01D2313/14—Specific spacers
    • B01D2313/146—Specific spacers on the permeate side
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus

Definitions

  • the present invention relates to a separation membrane element, a method of using the separation membrane element, and a water treatment apparatus.
  • Separation membranes used in the separation method using separation membrane elements are classified into microfiltration membranes, ultrafiltration membranes, nanofiltration membranes, reverse osmosis membranes, and forward osmosis membranes in terms of their pore size and separation function. These membranes are used, for example, for the production of drinking water from seawater, brackish water, water containing harmful substances, etc., the production of industrial ultrapure water, wastewater treatment, recovery of valuable resources, etc. It is used properly according to the separation component and separation performance.
  • the separation membrane element includes a plurality of bundled separation membranes so that the effective membrane area per separation membrane element is large, that is, the amount of permeated fluid obtained per separation membrane element is increased. It is formed to increase.
  • various shapes such as a spiral type, a hollow fiber type, a plate and frame type, a rotary flat membrane type, and a flat membrane integrated type have been proposed according to the application and purpose.
  • a spiral separation membrane element as shown in FIG. 1 is widely used for reverse osmosis filtration.
  • the spiral type separation membrane element 1 includes a perforated central tube 2 and a separation membrane unit wound around the perforated central tube 2.
  • the separation membrane unit permeates the supply side flow path material 3 that supplies the supply fluid 101 (that is, the fluid to be processed) to the surface of the separation membrane, the separation membrane 4 that separates the separation components contained in the supply fluid 101, and the separation membrane 4. It is formed by laminating a permeation side flow path material 5 for guiding the permeation fluid 102 separated from the supply fluid 101 to the perforated central tube 2.
  • the spiral type separation membrane element 1 is preferably used because a large amount of permeated fluid can be taken out by applying pressure to the supply fluid.
  • Patent Documents 1 to 3 In recent years, in order to meet the demand for higher performance of the spiral separation membrane element, a plurality of techniques for changing the behavior of the fluid inside the element have been proposed (Patent Documents 1 to 3).
  • the pressure loss of the feed fluid is larger than that of the normal separation membrane element, so that the winding body is deformed.
  • telescoping is likely to occur, which causes a short path of the supplied fluid and the separation performance is not sufficiently exhibited.
  • the membrane surface drops to the permeation side (due to the pressure difference between the permeation side and the supply side to the permeation side) as shown in the schematic cross-sectional view of the separation membrane unit in FIG.
  • the film surface is pressed) or the member that closes the end portion such as the supply side closing member 6 is deformed, the film surface is damaged, and the separation performance is significantly deteriorated.
  • the present invention prevents deformation of the winding body and damage to the membrane surface even when the pressure loss of the supply fluid is large, and enables operation while achieving both stable permeation performance and separation performance. It is an object of the present invention to provide a membrane element.
  • the present invention for achieving the above object mainly includes any of the following configurations.
  • a perforated central tube, a plurality of separation membranes having a supply side surface and a transmission side surface, a supply side flow path material, and a transmission side flow path material are provided.
  • the plurality of separation membranes are arranged and stacked so that the supply-side surfaces and the transmission-side surfaces face each other, and the supply-side flow path material is between the supply-side surfaces of the separation membrane.
  • the permeation side flow path material is arranged between the permeation side surfaces of the separation membrane, and around the perforated central tube, the separation membrane, the supply side flow path material, and the permeation side.
  • the flow path material is wound in the longitudinal direction of the separation membrane.
  • the surfaces on the supply side of the separation membrane are the end surface A in the longitudinal direction of the perforated central canal and the end surface B on the opposite side thereof, and the outer peripheral end X and the inner surface in the direction perpendicular to the longitudinal direction of the effective central canal.
  • the end face A is continuously closed by 60 to 95% from the outer peripheral end
  • the end face B is continuously closed by 75 to 100% from the inner peripheral end.
  • the inner peripheral end portion Y is closed, and only the inner peripheral end portion Y is open between the permeation-side surfaces of the separation membrane, and the outer peripheral end portion X and the end surfaces A and B are closed.
  • the lengths of the openings of the end faces A and the end faces B of the supply-side surfaces of the separation membrane are set to OL (A) and OL (B), respectively.
  • the width of the portion of the member for closing the end face A and the end face B of the supply-side surfaces of the separation membrane in contact with the separation membrane in the longitudinal direction of the perforated central canal is r ( Let A) and r (B) p (A) ⁇ q (A) and p (B) ⁇ q (B), A separation membrane element that meets at least one of the following requirements (i) and (ii). (I) In the member for closing the end faces B between the supply-side surfaces of the separation membrane, r (a portion having a length of at least OL (A) or more from the inner peripheral end to the outer peripheral side) B) exists continuously for 3 mm or more.
  • a supply fluid supply unit that is connected so as to communicate with an opening on the inner peripheral side of the supply side surfaces of the separation membrane and supplies the supply fluid
  • a water treatment apparatus having a concentrated fluid discharge unit connected so as to communicate with an opening on the outer peripheral side of the supply-side surfaces of the separation membrane and discharging the concentrated fluid.
  • a supply fluid supply unit that is connected so as to communicate with an opening on the outer peripheral side of the supply side surfaces of the separation membrane and supplies the supply fluid
  • a water treatment apparatus having a concentrated fluid discharge unit that is connected so as to communicate with an opening on the inner peripheral side of the supply-side surfaces of the separation membrane and discharges the concentrated fluid.
  • a perforated central tube, a plurality of separation membranes having a supply side surface and a transmission side surface, a supply side flow path material, and a transmission side flow path material are provided.
  • the plurality of separation membranes are arranged and stacked so that the surfaces on the supply side and the surfaces on the transmission side face each other, and are wound in the longitudinal direction thereof.
  • the supply-side flow path material is arranged between the supply-side surfaces of the separation membrane.
  • the permeation side flow path material is arranged between the permeation side surfaces of the separation membrane.
  • the surfaces on the supply side of the separation membrane are the end surface A in the longitudinal direction of the perforated central canal, the end surface A in the end surface B, and the outer peripheral end portion X in the direction perpendicular to the longitudinal direction of the effective central canal.
  • the outer peripheral end X in the inner peripheral end Y is opened by 5% or more, and the end face B and the inner peripheral end Y are both closed. Only the inner peripheral end portion Y is open between the surfaces on the permeation side of the separation membrane, and the outer peripheral end portion X and the end surfaces A and B are closed.
  • the width of the portion of the member for closing the end face A and the end face B of the supply-side surfaces of the separation membrane in contact with the separation membrane in the longitudinal direction of the perforated central canal is r ( Let A) and r (B) be the separation membrane elements that satisfy the following relationship.
  • the separation membrane element of the present invention it is possible to prevent the membrane surface from falling to the permeation side, deformation of the member that closes the ends of the plurality of laminated separation membranes, and further damage to the membrane surface. Even when the pressure loss of the supply fluid is large, high recovery rate operation with increased fluid flow velocity in the supply side flow path is possible, and concentration polarization in the supply side flow path is suppressed. , Fouling and scale generation are reduced, and stable transmission performance and separation performance can be maintained.
  • It is a schematic diagram (development view of the separation membrane unit) which shows an example of the structure of the separation membrane element of this invention.
  • It is a schematic diagram (developed view) which shows an example of the cross section of a separation membrane unit when the end face B on the supply side is closed by applying an adhesive from the outside after surrounding the separation membrane unit.
  • It is a schematic diagram (developed view) which shows an example of the cross section of a separation membrane unit when the end face B on the supply side is closed by applying an adhesive before surrounding the separation membrane unit.
  • FIG. 1 is used to explain the schematic configuration of the separation membrane element of the present invention, but the separation membrane element shown in FIG. 1 includes the supply fluid and the permeation fluid of each separation membrane unit in the present invention.
  • the flow paths of the above are not reflected, and they will be described in detail with reference to FIGS. 2 to 12.
  • the separation membrane element of the present invention includes a perforated central tube 2, a plurality of separation membranes 4 having a supply-side surface 10 and a transmission-side surface 11, and a supply-side flow path. It is necessary to include the material 3 and the transmission side flow path material 5. Further, the plurality of separation membranes 4 included in the separation membrane element 1A of the present invention are arranged and stacked so that the supply side surfaces 10 and the transmission side surfaces 11 face each other, and an example is shown in FIG. It is wound in the longitudinal direction as shown in. In the present invention, for convenience of explanation, a state in which the supply side flow path material 3 or the transmission side flow path material 5 is sandwiched between the plurality of separation membranes 4 is referred to as a separation membrane unit.
  • the separation membrane 4 included in the separation membrane element 1A of the present invention a membrane having separation performance according to the method of use, purpose and the like is used.
  • the separation membrane 4 may be a single layer, or may be a composite membrane including a separation functional layer and a base material from the viewpoint of strength or dimensional stability of the separation membrane 4. Further, in the composite membrane, a porous support layer may be further provided between the separation function layer and the base material.
  • the separation membrane 4 is a composite membrane, the surface provided with the separation functional layer is referred to as the supply side surface 10, and the surface opposite to the surface provided with the separation functional layer is referred to as the transmission side surface 11.
  • the separation function layer may be a layer having both a separation function and a support function, or may have only a separation function.
  • the "separation function layer” means a layer having at least a separation function.
  • the separation function layer has both a separation function and a support function
  • the separation function layer is preferably a layer containing a polymer selected from the group consisting of cellulose, polyvinylidene fluoride, polyethersulfone and polysulfone as a main component.
  • a crosslinked polymer layer is preferable from the viewpoint that the pore size can be easily controlled and the durability is excellent.
  • a polyamide separation functional layer obtained by polycondensing a polyfunctional amine and a polyfunctional acid halide, an organic-inorganic hybrid functional layer, and the like are preferable from the viewpoint of excellent separation performance of the separation component in the feed fluid 101.
  • These separation functional layers can be formed by polycondensing the monomers on the porous support layer.
  • the separation functional layer containing polyamide as a main component can be formed by interfacial polycondensation of a polyfunctional amine and a polyfunctional acid halide by a known method. For example, a polyfunctional amine solution is applied onto the porous support layer, excess polyfunctional amine solution is removed with an air knife or the like, and then an organic solvent solution containing a polyfunctional acid halide is applied to obtain a polycondensation. Condensation occurs to form a polyamide separation functional layer.
  • the material used for the porous support layer and its shape are not particularly limited, but for example, a material formed on a substrate by a porous resin may be used.
  • the porous support layer include layers of polysulfone, cellulose acetate, polyvinyl chloride, epoxy resin or a mixture thereof, or laminated layers thereof, but chemically, mechanically and thermally.
  • porous support layer containing polysulfone for example, an N, N-dimethylformamide solution of polysulfone is cast on a substrate (for example, a densely woven polyester non-woven fabric) to a certain thickness, and the solution is cast in water. It can be formed by wet coagulation.
  • porous support layer is described in "Office of Saline Water Research and Development Progress Report" No. It can be formed according to the method described in 359 (1968). The polymer concentration, solvent temperature or antisolvent can be adjusted as appropriate to obtain the desired form.
  • the base material of the separation membrane 4 it is preferable to use a fibrous base material from the viewpoint of strength or fluid permeability, and it is more preferable to use a long fiber non-woven fabric or a short fiber non-woven fabric.
  • the separation membrane 4 is formed in a rectangular shape. Then, as shown in FIG. 1, the separation membrane 4 having such a shape is wound around the perforated central canal 2.
  • the length in the winding direction of the separation membrane 4 that is, the length L in the longitudinal direction of the separation membrane 4 and the length W in the direction perpendicular to the longitudinal direction of the separation membrane 4 (that is, in the longitudinal direction of the perforated central tube 2).
  • the L / W value is preferably 2.5 or more.
  • the length L is preferably 750 mm or more.
  • the supply-side flow path material 3 included in the separation membrane element 1A of the present invention is arranged so as to be sandwiched between the supply-side surfaces 10 of the separation membrane 4, and is supplied to the separation membrane 4.
  • a flow path for supplying the fluid (that is, a flow path on the supply side) is formed.
  • the supply-side flow path material 3 is preferably shaped so as to disturb the flow of the supply fluid 101 in order to suppress the concentration polarization of the supply fluid 101.
  • the supply-side flow path material 3 may be a film or a net, or a member having a continuous shape such that a convex object is provided on a sheet having voids, or with respect to the separation membrane 4. It may have a discontinuous shape showing a projected area ratio of more than 0 and less than 1. Further, the supply side flow path material 3 may be separable from the separation membrane 4 or may be fixed to the separation membrane 4.
  • the material of the supply-side flow path material 3 is not particularly limited, and may be the same material as that of the separation membrane 4 or a different material.
  • the projected area ratio of the supply side flow path material 3 to the separation membrane 4 is preferably 0.03 to 0.80, more preferably 0.05 to 0.50, and 0.08 to 0. It is more preferably .35.
  • the projected area ratio of the supply-side flow path material 3 to the separation film 4 can be calculated by analyzing an image of the supply-side flow path material 3 taken with a microscope from a direction perpendicular to the membrane surface.
  • the thickness of the supply-side flow path material 3 is preferably 0.08 to 2.0 mm, more preferably 0.20 to 1.00 mm.
  • the thickness of the supply side flow path material 3 can be directly measured with a commercially available thickness measuring device.
  • Permeation-side flow path material The permeation-side flow path material 5 included in the separation membrane element 1A of the present invention is arranged so as to be sandwiched between the permeation-side surfaces 11 of the separation membrane 4, and permeates the separation membrane 4.
  • a flow path (that is, a permeation side flow path) that guides the flow to the permeation side outlet end face is formed.
  • the permeation side flow path material 5 reduces the flow resistance of the permeation side flow path, suppresses the separation membrane 4 from falling into the permeation fluid flow path even under pressure filtration, and forms the flow path stably.
  • the cross-sectional area ratio is preferably 0.3 to 0.75, and more preferably 0.4 to 0.6.
  • the permeation side flow path material 5 includes, for example, a conventional tricot, a weft knit with a reduced amount of fibers, a sheet in which protrusions are arranged on a porous sheet such as a non-woven fabric, or unevenness in which a film or a non-woven fabric is unevenly processed. A processed sheet can be mentioned.
  • the cross-sectional area ratio of the permeation side flow path material will be described.
  • the permeation side flow path material When the permeation side flow path material is loaded into the separation membrane element, it is cut so as to pass through the convex portion of the permeation side flow path material along the longitudinal direction of the water collecting pipe, and the cross section thereof is a convex portion adjacent to the center of the convex portion.
  • the ratio of the product of the distance to the center (also called pitch) and the height of the transmission side flow path material to the cross-sectional area of the transmission side flow path material occupied between the center of the convex portion and the center of the adjacent convex portion. Is the cross-sectional area ratio.
  • the flow resistance of the permeation side flow path can be further reduced.
  • the separation membrane element containing the flow path material having a large flow resistance is operated at the same recovery rate, the flow velocity of the supply fluid 101 is increased and the concentration polarization can be reduced, and the concentration polarization is particularly high under high recovery rate operation. It is possible to further suppress the increase in the amount of water and the occurrence of scale.
  • the thickness of the permeation side flow path material 5 is preferably 0.05 to 0.50 mm, more preferably 0.10 to 0.40 mm.
  • the thickness of the permeation side flow path material 5 can be directly measured with a commercially available thickness measuring device.
  • the material of the permeation side flow path material 5 can be easily wound in a spiral shape, its compressive elastic modulus is preferably 0.1 to 5.0 GPa.
  • Examples of the material having a compressive elastic modulus of 0.1 to 5.0 GPa include polyester, polyethylene and polypropylene.
  • the compressive elastic modulus of the permeation side flow path material 5 can be measured by performing a compression test using a precision universal testing machine and creating a stress-strain diagram.
  • the separation membrane element of the present invention is a spiral type separation membrane element having a long supply-side flow path.
  • the supply-side surfaces 10 of the separation membrane 4 are expanded into the separation membrane unit of FIG.
  • the end face A is continuously closed by 60 to 95% from the outer peripheral end
  • the end face B is continuously closed by 75 to 100% from the inner peripheral end
  • the inner peripheral end is closed. Part Y is closed.
  • the supply-side surfaces 10 of the separation membrane 4 are open near the inner peripheral end portion of the end surface A, and are open near the outer peripheral end portion and / or the outer peripheral end portion X of the end surface B.
  • the flow velocity of the supply fluid 101 can be increased as compared with the conventional separation membrane element 1 in which the supply fluid 101 flows in parallel with the perforated central canal 2, and the element can be made more resistant to fouling and scaling. .. Further, it is preferable that the inner peripheral end portions Y of the permeation side surfaces 11 of the separation membrane 4 are opened by 90% or more from the viewpoint of reducing pressure loss.
  • FIGS. 5 and 6 are schematic views showing an example of a state in which the separation membrane element 1A of the present invention is loaded in the vessel 23.
  • a porous member 20 having a plurality of holes through which a fluid passes is further wound on the outer peripheral surface of the laminated and wound separation membrane unit. ..
  • Examples of the porous member 20 include a net, a porous film, and the like.
  • a brine seal is provided in the gap between the separation membrane element 1A and the vessel 23 so that the supply fluid 101, the permeated fluid 102, and the concentrated fluid 103 are not mixed in the vessel 23. 22 is arranged.
  • the separation membrane element 1A of the present invention includes a plurality of types of separation membrane elements classified in terms of the flow direction of the supply fluid. One of them is an inverted L-shaped separation membrane element.
  • the end faces A of the supply-side surfaces 10 of the separation membrane 4 are connected to each other.
  • the supply fluid 101 is supplied from the opening of the above, and the concentrated fluid 103 is discharged from the opening of the outer peripheral end X between the supply-side surfaces 10 of the separation membrane 4.
  • the separation membrane element 1A to which such a usage method is applied is referred to as an inverted L-type separation membrane element here.
  • the end face A and the outer peripheral end portion X of the separation membrane 4 on the supply side are opened by 5% or more, and the end face B and the inner peripheral end portion Y are opened. However, it is preferable that all of them are closed. Further, it is necessary that the permeation-side surfaces 11 of the separation membrane 4 are opened only at the inner peripheral end portion Y, and the outer peripheral end portions X and the end surfaces A and B are all closed. That is, in the inverted L-shaped separation membrane element, the end faces B between the supply-side surfaces 10 of the separation membrane 4 are completely closed.
  • the end faces A of the supply-side surfaces 10 of the separation membrane 4 have an opening near the inner peripheral end portion from the viewpoint of homogenizing the flow of the supply fluid 101 in the supply-side flow path. It is more preferable that the opening is -40%.
  • the portion (opening) opened in the end face A is not limited to one place, and may be divided into a plurality of parts.
  • the outer peripheral ends X of the surfaces 10 on the supply side of the separation membrane may have a small aperture ratio in order to increase the flow velocity near the outlet of the concentrated fluid 103.
  • the opening at the outer peripheral end X is not limited to one place, and may be divided into a plurality of places.
  • the aperture ratio is the ratio of the length of the opening to the total length of the separation membrane 4 at the side of the separation membrane provided with the opening.
  • the opening length OL (A) is the length from the inner peripheral end to the outer peripheral end of the opening as shown in FIG. 7, and when the opening is divided into a plurality of, the opening on the innermost peripheral side. The length is from the inner peripheral end to the outer peripheral end of the opening on the outermost side.
  • the separation membrane element 1A of the present invention also includes an L-type separation membrane element.
  • the outer peripheral end portions of the supply-side surfaces 10 of the separation membrane 4 are connected to each other.
  • the supply fluid 101 is supplied from the opening of X, and the concentrated fluid 103 is discharged from the opening of the end faces A of the supply-side surfaces 10 of the separation membrane 4.
  • the separation membrane element 1A to which such a usage method is applied is referred to as an L-type separation membrane element here.
  • the end face A and the outer peripheral end portion X of the separation membrane 4 on the supply side are opened by 5% or more, and the end face B and the inner peripheral end portion Y are open. However, it is preferable that all of them are closed. Further, it is necessary that the permeation-side surfaces 11 of the separation membrane 4 are opened only at the inner peripheral end portion Y, and the outer peripheral end portions X and the end surfaces A and B are all closed. That is, in the L-shaped separation membrane element, the end faces B between the supply-side faces 10 of the separation membrane 4 are completely closed.
  • the L-type separation membrane element has the same bonding method as the inverted L-type separation membrane element, but the concentrated fluid 103 is discharged from the end faces A of the supply-side surfaces 10 of the separation membrane 4, so that the above It is preferable that the aperture ratio in the vicinity of the inner peripheral end portion Y of the end surface A is smaller than that in the case of the inverted L-shaped separation membrane element.
  • the aperture ratio of the outer peripheral end portions X is preferably 90% or more.
  • the openings in the end face A and the outer peripheral end X are not limited to one, and may be divided into a plurality of openings.
  • the opening length OL (A) is the length from the inner peripheral end to the outer peripheral end of the opening as shown in FIG.
  • the separation membrane element 1A of the present invention also includes an inverted S-type separation membrane element.
  • the end faces A of the supply-side surfaces 10 of the separation membrane 4 are connected to each other.
  • the supply fluid 101 is supplied from the opening near the inner circumference of the above, and the concentrated fluid 103 is discharged from the opening near the outer periphery of the end faces B between the supply-side surfaces 10 of the separation membrane 4.
  • the separation membrane element 1A to which such a usage method is applied is referred to as an inverted S-type separation membrane element here.
  • the outer peripheral end portions X between the supply-side surfaces 10 of the separation membrane 4 are completely closed.
  • the end surface A to which the supply fluids 101 of the supply side surfaces 10 of the separation membrane 4 are supplied is located near the inner peripheral end portion Y from the viewpoint of homogenizing the flow of the supply fluid 101 in the supply side flow path. It is open, more preferably 5-40% open.
  • the portion (opening) opened in the end face A is not limited to one place, and may be divided into a plurality of parts.
  • the end surface B from which the concentrated fluid 103 between the supply side surfaces 10 of the separation membrane 4 is discharged has an opening in the vicinity of the outer peripheral end portion X from the viewpoint of homogenizing the flow of the supply fluid 101 in the supply side flow path.
  • the aperture ratio may be smaller than that of the end face on the supply side.
  • the opening in the end face B is not limited to one place, and may be divided into a plurality of places.
  • the opening lengths OL (A) and OL (B) are the lengths from the inner peripheral end to the outer peripheral end of the opening as shown in FIG. 9, and when the opening is divided into a plurality of parts on each end face. Is the length from the inner peripheral end of the opening on the innermost peripheral side to the outer peripheral end of the opening on the outermost peripheral side in each end face.
  • the separation membrane element 1A of the present invention also includes an S-type separation membrane element.
  • the end faces B of the supply side surfaces 10 of the separation membrane 4 are connected to each other.
  • the supply fluid 101 is supplied from the opening near the outer periphery, and the concentrated fluid 103 is discharged from the opening near the inner circumference of the end faces A between the supply-side surfaces 10 of the separation membrane 4.
  • the separation membrane element 1A to which such a usage method is applied is referred to as an S-type separation membrane element here.
  • the outer peripheral end portions X between the supply-side surfaces 10 of the separation membrane 4 are completely closed.
  • the S-type separation membrane element has the same bonding method as the inverted S-type separation membrane element, but the concentrated fluid 103 is formed through an opening near the inner peripheral end portion Y of the end faces A of the supply-side surfaces 10 of the separation membrane 4. It is preferable that the aperture ratio in the vicinity of the inner peripheral end portion of the end face A is smaller than that in the case of the inverted S-type separation membrane element.
  • the opening near the outer peripheral end portion X of the end faces B between the supply-side surfaces 10 of the separation membrane 4 supplies the supply fluid 101, and therefore is preferably larger than the opening near the inner peripheral end portion Y. ..
  • the openings in the end faces A and B are not limited to one place, and may be divided into a plurality of openings.
  • the opening lengths OL (A) and OL (B) are the lengths from the inner peripheral end to the outer peripheral end of the opening as shown in FIG. 10, and when the opening is divided into a plurality of parts on each end face. Is the length from the inner peripheral end of the opening on the innermost peripheral side to the outer peripheral end of the opening on the outermost peripheral side in each end face.
  • the separation membrane element 1A of the present invention also includes an inverted SL type separation membrane element.
  • the end faces B of the supply-side surfaces 10 of the separation membrane 4 are connected to each other.
  • the outer peripheral end portions X of the outer peripheral portions of the separation membrane 4 and the supply-side surfaces 10 of the separation membrane 4 are open, and the inner peripheral edges of the end surfaces A of the supply-side surfaces 10 of the separation membrane 4 are open.
  • an inverted SL type element a method of supplying the supply fluid 101 from the opening of the end surface A near the inner peripheral end portion Y is referred to as an inverted SL type element.
  • This separation membrane element is in the form of a combination of an inverted S type and an inverted L type, that is, a form in which the above-mentioned inverted S type separation membrane element and the inverted L type separation membrane element are added together.
  • the opening position of the outer peripheral end portion X is not limited.
  • the opening lengths OL (A) and OL (B) are the lengths from the inner peripheral end to the outer peripheral end of the opening as shown in FIG.
  • the separation membrane element 1A of the present invention also includes an SL type separation membrane element.
  • the end faces B of the supply side surfaces 10 of the separation membrane 4 are The outer peripheral end portions X of the outer peripheral portions and the supply-side surfaces 10 of the separation membrane 4 are open, and the inner peripheral edges of the end surfaces A of the supply-side surfaces 10 of the separation membrane 4 are open.
  • a method of supplying the supply fluid 101 from the openings of the outer peripheral end portion X and the end surface B is referred to as an SL type element.
  • This separation membrane element has a form such that a combination of S-type and L-type is used, that is, the above-mentioned S-type separation membrane element and L-type separation membrane element are added together.
  • the opening position of the outer peripheral end portion X is not limited.
  • the opening lengths OL (A) and OL (B) are the lengths from the inner peripheral end to the outer peripheral end of the opening as shown in FIG.
  • the method of closing the end faces A and the end faces B of the perforated central canal 2 in the longitudinal direction between the supply-side surfaces 10 of the separation membrane 4 is performed before winding. There is a way to do it after the siege. Examples of the method performed before encircling include adhesion with an adhesive, adhesion with a hot melt resin, and adhesion with an adhesive tape. In the case of performing after winding, a method of applying an adhesive from the outside and adhering the adhesive can be mentioned.
  • an end plate 21 may be attached to the end face A and the end face B in the longitudinal direction of the perforated central tube 2 in order to prevent telescoping of the wound body. Since the fluid enters and exits the end plate 21 mounted on the end surface A, it is necessary that a hole exists.
  • the end plate 21 mounted on the end face B has holes when fluid enters and exits from the end face B, and may or may not have holes when fluid does not enter and exit from the end face B. Examples of the material of the end plate 21 include ABS, polyvinyl chloride, polyethylene and polypropylene.
  • adhesion with an adhesive is used as a method of closing the outer peripheral end portion X and the inner peripheral end portion Y in the direction perpendicular to the longitudinal direction of the perforated central tube 2 between the surfaces 11 on the transmission side of the separation membrane 4.
  • adhesion with an adhesive is used as a method of closing the outer peripheral end portion X and the inner peripheral end portion Y in the direction perpendicular to the longitudinal direction of the perforated central tube 2 between the surfaces 11 on the transmission side of the separation membrane 4.
  • Adhesion with hot melt resin Adhesion with adhesive tape, etc.
  • the supply-side closing member 6 and the transmission-side closing member 7 for closing the supply-side surfaces 10 and the transmission-side surfaces 11 are urethane-based adhesives in consideration of adhesive strength, hardness at the time of curing, handleability, and the like. It is desirable to use an agent or an epoxy adhesive.
  • the viscosity of the adhesive before curing is preferably 4 to 15 Pa ⁇ s from the viewpoint of facilitating its handling and suppressing the occurrence of wrinkles when winding the separation membrane 4. It is more preferably about 12 Pa ⁇ s.
  • the perforated central tube 2, the separation membrane 4, the supply side flow path material 3 and the transmission side flow path material 5 are arranged, and the end portions X and Y and the end faces A and B are closed or opened to supply the fluid. Since the flow of the fluid 101 can be directed along the longitudinal direction of the separation membrane 4, the supply fluid 101 can be a spiral type separation membrane element having a high flow velocity. However, if the supply fluid 101 is simply made into a spiral separation membrane element having a high flow velocity by the above method, the pressure loss of the supply fluid 101 will be larger than that of the normal separation membrane element 1, and the winding body will be deformed.
  • the sectional views of the separation membrane unit of FIGS. 3 and 4 (however, both views show the end portion on the end face B side) and the development of the separation membrane unit of FIGS. 7 to 12.
  • the separation membrane element 1A sets the lengths of the openings of the end faces A and the end faces B of the supply-side surfaces 10 of the separation membrane 4 to OL (A) and OL (B), respectively.
  • the widths of the perforated central canal 2 in the longitudinal direction of the portion of the member 6 in contact with the separation membrane 4 are r (A) and r (B), respectively, p (A) ⁇ q (A) and p ( B) ⁇ q (B), and at least one of the following requirements (i) and (ii) shall be satisfied.
  • the length is at least OL (A) or longer from the inner peripheral side end to the outer peripheral side.
  • the r (B) of the portion exists continuously by 3 mm or more.
  • the length is at least OL (B) or longer from the outer peripheral end to the inner peripheral side.
  • the r (A) of the portion exists continuously by 3 mm or more.
  • p, q, and r are average values measured at intervals of 20 mm in the winding direction with the separation membrane unit unfolded, respectively.
  • the inner circumference and the outer circumference refer to the portion closest to the perforated central tube 2 in the expanded state of the separation membrane unit as the inner circumference, and the portion farthest from the perforated central tube 2 as the outer circumference.
  • the separation membrane 4 is supplied to the effective membrane portion of the surface 10 on the supply side. Since the side closing member 6 does not come into contact with each other, damage to the film surface can be prevented.
  • inverted L-type and L-type separation membrane elements since the openings between the surfaces 10 on the supply side exist in the end surface A, it is necessary to satisfy the above (i).
  • inverted S-type, S-type, inverted SL-type, and SL-type separation membrane elements it is particularly necessary to strengthen the end face on the side opposite to the end face on the side where the fluid whose supply fluid 101 has a higher pressure is supplied. .. That is, it is necessary to satisfy at least the above (i) for the inverted S type and the inverted SL type, and at least the above (ii) for the S type and the SL type.
  • r (A) is satisfied in order to satisfy the above (i) and (ii).
  • r (B) of 3 mm or more, it is preferable to apply pressure from the outside to push the adhesive, or to suck the adhesive from the opposite end face.
  • the p (A) and p (B) between the permeation side surfaces 11 of the separation membrane 4 are preferably 5 to 30 mm in order to maintain the strength while securing the effective membrane area as much as possible.
  • the ratio of p (B) and q (B) is preferably q (A) / p (A) ⁇ 0.5.
  • q / p is an average value measured in the element at intervals of 20 mm.
  • the coefficient of variation of r (A) or r (B), which is 3 mm or more, is 0.00 or more and 0.20 or less, the load applied due to the pressure loss can be supported more uniformly, and r (A). Alternatively, even in a situation where r (B) is close to 3 mm, deformation of the separation membrane element can be prevented more reliably.
  • the coefficient of variation is a value obtained by measuring r (A) or r (B) at intervals of 20 mm in the winding direction and dividing the standard deviation by the average value.
  • the separation membrane element 1A of the present invention can be applied to a water treatment device such as an RO water purifier.
  • a water treatment device such as an RO water purifier.
  • the separation membranes 4 are supplied from the inner peripheral side openings of the end faces A of the supply-side surfaces 10 of each other.
  • the fluid 101 is supplied and connected to the water treatment device so as to discharge the concentrated fluid from the openings of the end faces B, the outer peripheral end portions X, or both of the supply-side surfaces 10 of the separation membrane 4.
  • the supply fluid supply unit is connected so as to communicate with the inner peripheral side opening (the inner peripheral side opening of the end surface A) between the supply side surfaces 10 of the separation membrane 4, and the supply side of the separation membrane 4 is connected.
  • the concentrated fluid discharge portion is connected so as to communicate with the opening on the outer peripheral side of the surfaces 10 (the opening of the end surface B, the outer peripheral end X, or both of them).
  • the supply fluid 101 is supplied from the openings of the end faces B, the outer peripheral end portions X, or both of the supply-side surfaces 10 of the separation membrane 4. It is connected to the water treatment device so as to discharge the concentrated fluid 103 from the opening on the inner peripheral side of the end surface A between the supply side surfaces 10 of the separation membrane 4. Therefore, the supply fluid supply portion is connected so as to communicate with the outer peripheral side openings (the end surface B, the outer peripheral end portion X, or both of the openings) of the supply side surfaces 10 of the separation membrane 4, and the separation membrane 4 is connected.
  • the concentrated fluid discharge portion is connected so as to communicate with the inner peripheral side opening (the inner peripheral side opening of the end surface A) between the supply side surfaces 10 of the above.
  • OL (A), OL (B) The OL (A) and OL (B) are measured using a caliper with the separation membrane element unwound and the separation membrane element unfolded.
  • Water production reduction rate (%) 100 x (1- (water production after 100 hours operation) / (initial water production)) (Recovery rate)
  • the ratio of the supplied water amount supplied per minute to the permeated water amount was defined as the recovery rate.
  • TDS removal rate The concentration of total dissolved solids (hereinafter, "TDS") was measured by measuring the electrical conductivity of the supplied water and the sampled permeated water that were sampled for 1 minute in the measurement of the initial water production amount, and TDS was removed from the following formula. The rate was calculated.
  • TDS removal rate (%) 100 ⁇ ⁇ 1- (TDS concentration in permeated water / TDS concentration in feed water) ⁇ (Example 1)
  • Cast at 25 ° C. immediately immersed in pure water, left for 5 minutes, and immersed in warm water at 80 ° C. for 1 minute to form a porous support layer (thickness: 0. 13 mm) was produced.
  • the porous support layer was immersed in a 3.8 mass% aqueous solution of m-phenylenediamine for 2 minutes, then slowly pulled up in the vertical direction, and nitrogen was blown from an air nozzle to remove excess aqueous solution from the surface of the porous support layer. Then, a 0.175 mass% n-decane solution of trimesic acid chloride was applied so that the surface was completely wet, allowed to stand for 1 minute, and held vertically for another 1 minute to drain the liquid. Then, it was washed with hot water of 90 degreeC for 2 minutes to obtain a separation membrane.
  • the length L of the separation membrane in the separation membrane unit in the winding direction is 1200 mm.
  • a plurality of sheets were cut so that the length W of the effective central canal 2 in the longitudinal direction was 250 mm.
  • a net is used as a flow path material on the supply side so that the inclination angle of the net constituent yarn is 45 ° with respect to the winding direction. Placed in.
  • the surfaces on the supply side of the separation membrane are continuously urethane from the outside to the inside in the winding direction so that the end surface A in the direction perpendicular to the longitudinal direction of the separation membrane opens by 20%.
  • a system adhesive was applied.
  • the end face B was continuously coated with a urethane adhesive so as to be completely closed.
  • the separation membrane was folded with the supply side side inside so that the inner peripheral end portion Y became a crease.
  • Urethane-based adhesive was continuously applied to the surfaces on the permeation side of the separation membrane so that the inner peripheral end portion was fully opened and the other end surfaces and the like were completely closed.
  • the adhesive on the permeation side of the end face A and the end face B was applied to the inside of the supply side so that p (A)> q (A) and p (B)> q (B).
  • the permeation side flow path material was prepared as follows using an applicator loaded with a comb-shaped shim having a slit width of 0.5 mm and a pitch of 0.9 mm. That is, while adjusting the temperature of the backup roll to 20 ° C., when it is used as a separation membrane element, it is linear from the inner end to the outer end in the winding direction so as to be perpendicular to the longitudinal direction of the perforated central tube.
  • Highly crystalline PP (MFR 1000 g / 10 minutes, melting point 161 ° C.) 60% by mass and low crystalline ⁇ -olefin polymer (manufactured by Idemitsu Kosan Co., Ltd .; low stereoregular polypropylene "L-MODU / S400" (trade name))
  • a composition pellet composed of 40% by mass was prepared by applying it on a polypropylene at a resin temperature of 205 ° C. and a traveling speed of 10 m / min.
  • the non-woven fabric had a thickness of 0.07 mm, a basis weight of 35 g / m 2 , and an embossed pattern (circular shape with a diameter of 1 mm and a grid shape with a pitch of 5 mm).
  • the prepared permeation-side flow path material is cut and placed on the permeation-side surface of the separation membrane sandwiching the supply flow path material, and these are placed in a perforated central canal made of ABS (acrylonitrile-butadiene-styrene). Width: 300 mm, diameter: 18 mm, number of holes 10 x linear 1 row) was spirally surrounded. A film having holes was wrapped around the outer peripheral surface of the spiral-shaped separation membrane element. In this film, there are four holes having a width (major axis) of 40 mm and a height (minor axis) of 10 mm in the width direction (corresponding to the circumferential direction of the separation membrane element) in the central portion of the film having a width of 200 mm.
  • the separation membrane element was placed in a vessel, the usage pattern was inverted L, and each performance was evaluated with a recovery rate of 90%. The results were shown in Table 1.
  • Example 2 The application position and application amount of the adhesive for adhering the end face A and the end face B are changed, and p (A), q (A), p (B), q (B), r (A), r ( Separation membranes and separation membrane elements were prepared in the same manner as in Example 1 except that B) was as shown in Table 1.
  • Example 6 The application position and application amount of the adhesive for adhering the end face A and the end face B are changed, and p (A), q (A), p (B), q (B), r (A), r ( A separation membrane and a separation membrane element were prepared in the same manner as in Example 1 except that B) was as shown in Table 2.
  • Table 2 shows the results when each performance was evaluated under the same conditions as in Example 1 except that the separation membrane element was placed in a vessel and the usage pattern was L-shaped.
  • Example 11 Each member was prepared in the same manner as in the first embodiment, and the separation membrane element was wound in the same manner as in the first embodiment except that the adhesive was not applied to the supply side surface of the separation membrane before the surrounding. did. Adhesive is applied from the outside to the end face B side in the longitudinal direction of the wound element, sucked from the end face A side with a vacuum pump, and the adhesive is drawn to the back of the supply side flow path (in the longitudinal direction of the perforated central canal). Infiltrated. An adhesive was applied (without suction) to the end face A side of the surface on the supply side of the separation membrane so that the opening ratio on the raw water side was 20% to prepare a separation membrane element.
  • Example 12 A separation membrane and a separation membrane element were produced in the same manner as in Example 11.
  • Table 3 shows the results when each performance was evaluated under the same conditions as in Example 1 except that the separation membrane element was placed in a vessel and the usage pattern was L-shaped.
  • Example 13 The separation membrane and the separation membrane element were produced in the same manner as in Example 1 except that the number of pairs of separation membranes and members to be wound was three and the winding circumference was 3 inches.
  • Example 14 to 16 The separation membrane and the separation membrane element were produced in the same manner as in Example 1 except that the aperture ratio of the opening of the end face A was as shown in Table 3.
  • Example 17 The separation membrane was cut in the same manner as in Example 1 except that the membrane and the flow path material were cut so that L and W were as shown in Table 4, and the number of pairs of membrane and flow path material to be wound was two. And a separation membrane element was made.
  • Example 18 Regarding the surface on the supply side of the separation membrane, the opening width in the vicinity of the outer peripheral portion of the separation membrane element of the end surface B is set to 200 mm, and the outer peripheral end portion is changed to a non-permeable film having no holes. Separation membranes and separation membrane elements were produced in the same manner as in Example 1 except that the opening width of X was set to 0 mm.
  • Table 4 shows the results when each performance was evaluated under the same conditions as in Example 1 except that the separation membrane element was placed in a vessel and the usage pattern was inverted S type.
  • Example 19 With respect to the surface on the supply side of the separation membrane, urethane adhesive was applied so that the opening width in the vicinity of the outer peripheral portion of the separation membrane element on the end surface B was 100 mm, and the outer peripheral end portion X was continuously opened 100 mm from the end surface B side.
  • a separation membrane and a separation membrane element were produced in the same manner as in Example 1 except for the above.
  • Table 4 shows the results when each performance was evaluated under the same conditions as in Example 1 except that the separation membrane element was placed in a vessel and the usage pattern was an inverted SL type.
  • Example 20 Each member was prepared in the same manner as in the first embodiment, and the separation membrane element was wound in the same manner as in the first embodiment except that the adhesive was not applied to the supply side surface of the separation membrane before the surrounding. did. Next, a urethane adhesive is applied from the outside to the inner circumference 20% of the end face B side in the longitudinal direction of the wound element, masking the outer circumference 80% portion of the end face B side, and then vacuuming from the end face A side. The adhesive was infiltrated in the longitudinal direction of the perforated central canal by suction with a pump.
  • a urethane adhesive is applied to the portion of the outer circumference 80% on the end face B side (without suction), and further, the opening on the end face A side is continuously 20% from the inside on the end face A side. Adhesive was applied (no suction).
  • Table 4 shows the results when each performance was evaluated under the same conditions as in Example 1 except that the separation membrane element was placed in a vessel and the usage pattern was inverted L type.
  • Example 21 A separation membrane element was produced in the same manner as in Example 18.
  • Table 5 shows the results when each performance was evaluated under the same conditions as in Example 1 except that the separation membrane element was placed in a vessel and the usage pattern was inverted S type.
  • Example 22 With respect to the surface on the supply side of the separation membrane, urethane adhesive was applied so that the opening width of the end surface B near the outer peripheral portion of the separation membrane element was 100 mm and the outer peripheral end portion X was continuously opened 100 mm from the end surface A side.
  • a separation membrane and a separation membrane element were produced in the same manner as in Example 1 except for the above.
  • Table 5 shows the results when each performance was evaluated under the same conditions as in Example 1 except that the separation membrane element was placed in a vessel and the usage pattern was SL type.
  • Table 7 shows the results when each performance was evaluated under the same conditions as in Example 1 except that the separation membrane element was placed in a vessel and the usage method was L-shaped.
  • q (A) / p (A) and q (B) / p (B) are 2, and the supply-side adhesive is applied to the effective film portion, so that film surface damage occurs during flushing. It is thought that it was. It is probable that the separation membrane element was deformed during the flushing operation due to the small r (A) and r (B) on the opposite side of the opening as 2 mm, resulting in a short pass.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

L'invention concerne un élément de membrane de séparation de type spirale ayant un chemin d'écoulement côté alimentation allongé, dans lequel: afin d'empêcher la déformation d'un corps de plaie et d'endommager une surface de membrane et de permettre un fonctionnement avec une perméabilité et une performance de séparation stables même lorsqu'une perte de pression d'un fluide d'alimentation est importante, l'élément de membrane de séparation en spirale comprend un tuyau central perforé, une pluralité de membranes de séparation ayant chacune une surface côté alimentation et une surface côté perméation, un matériau de chemin d'écoulement côté alimentation et un matériau de chemin d'écoulement côté perméation; la pluralité de membranes de séparation étant agencées de telle sorte que les surfaces côté alimentation se font face et les surfaces côté perméation se font face; le matériau de chemin d'écoulement côté alimentation est disposé entre des paires des surfaces côté alimentation des membranes de séparation; le matériau de chemin d'écoulement côté perméation est disposé entre des paires des surfaces côté perméation des membranes de séparation; et les longueurs d'ouvertures dans les faces d'extrémité côté alimentation des membranes de séparation et les largeurs d'éléments d'étanchéité sur le côté d'alimentation et le côté de perméation des membranes de séparation satisfont une relation prescrite.
PCT/JP2020/024361 2019-06-27 2020-06-22 Élément de membrane de séparation, son procédé d'utilisation et dispositif de traitement d'eau Ceased WO2020262290A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012091027A1 (fr) * 2010-12-28 2012-07-05 東レ株式会社 Élément de séparation membranaire
JP2015110220A (ja) * 2013-10-31 2015-06-18 東レ株式会社 スパイラル型分離膜エレメントおよびその製造方法
JP2015150545A (ja) * 2014-02-19 2015-08-24 東レ株式会社 スパイラル型流体分離素子
WO2016194833A1 (fr) * 2015-05-29 2016-12-08 住友化学株式会社 Élément de membrane de séparation de gaz acide en spirale, module de membrane de séparation de gaz acide, et dispositif de séparation de gaz acide
WO2018021387A1 (fr) * 2016-07-28 2018-02-01 東レ株式会社 Élément de membrane de séparation

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002095935A (ja) * 2000-09-25 2002-04-02 Nitto Denko Corp スパイラル型分離膜エレメント
JP2006218345A (ja) * 2005-02-08 2006-08-24 Nitto Denko Corp スパイラル型膜エレメント及びその製造方法
DE102009035300B4 (de) 2009-07-30 2017-05-18 Siemens Aktiengesellschaft Flugstromvergaser mit integriertem Strahlungskühler
WO2014208602A1 (fr) * 2013-06-28 2014-12-31 東レ株式会社 Élément de membrane de séparation
WO2017019282A1 (fr) 2015-07-29 2017-02-02 Dow Global Technologies Llc Ensemble filtre comprenant un module à membrane enroulée en spirale et un joint pour saumure
JP2017047417A (ja) * 2015-08-31 2017-03-09 東レ株式会社 分離膜モジュール、分離膜エレメントおよびテレスコープ防止板
JP7089352B2 (ja) * 2016-09-16 2022-06-22 日東電工株式会社 スパイラル型膜エレメント
JP2018126706A (ja) * 2017-02-10 2018-08-16 東レ株式会社 膜分離装置および流体分離方法
EP3603776A4 (fr) * 2017-09-29 2021-05-19 Sumitomo Chemical Company Limited Élément de membrane de séparation de gaz de type spiralé, module à membranes de séparation de gaz et dispositif de séparation de gaz

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012091027A1 (fr) * 2010-12-28 2012-07-05 東レ株式会社 Élément de séparation membranaire
JP2015110220A (ja) * 2013-10-31 2015-06-18 東レ株式会社 スパイラル型分離膜エレメントおよびその製造方法
JP2015150545A (ja) * 2014-02-19 2015-08-24 東レ株式会社 スパイラル型流体分離素子
WO2016194833A1 (fr) * 2015-05-29 2016-12-08 住友化学株式会社 Élément de membrane de séparation de gaz acide en spirale, module de membrane de séparation de gaz acide, et dispositif de séparation de gaz acide
WO2018021387A1 (fr) * 2016-07-28 2018-02-01 東レ株式会社 Élément de membrane de séparation

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CN114025866A (zh) 2022-02-08

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