Technical field
[0001]
　The present invention relates to a membrane separation apparatus, in particular, it relates to membrane separation apparatus suitably used as a scale monitoring membrane separation apparatus for water treatment device.
Background technique
[0002]
　Conventionally, as a sealing member between the upper support and the lower support for holding the test membrane, and an inner O-ring for sealing between the separation membrane and the lower support, between the upper support and the lower support flat membrane testing apparatus in which the outer O-ring disposed in the groove of the lower support member for sealing has been proposed (e.g., see Patent Document 1). In the flat membrane testing apparatus, and fed from the treated water inlet provided in the lower support water to be treated to a flat membrane testing the device, permeate provided a permeate having passed through the separation membrane to the upper support while discharged from the discharge port to discharge the concentrated water from the concentrated water discharge port provided in the lower cell.
CITATION
Patent Literature
[0003]
Patent Document 1: U.S. Patent No. 4,846,970
Summary of the Invention
Problems that the Invention is to Solve
[0004]
　However, flat membrane testing apparatus described in Patent Document 1, since by contacting the separation membrane and the inner O-ring seals between the separator film and the lower support, with the deterioration of the inner O-ring separation and the corner portion of the groove of the lower support that houses the membrane and the inner O-ring there is a problem to damage the separation membrane in contact. Therefore, corruption capable membrane separation apparatus to prevent the separation membrane due to the deterioration of the sealing member is desired.
[0005]
　The present invention has been made in view of such circumstances, even if the seal member is deteriorated, and an object thereof is to provide a membrane separation apparatus which can prevent damage to the separation membrane.
Means for Solving the Problems
[0006]
　Membrane separation apparatus of the present invention includes a lower support treated water inlet and concentrate outlet is provided, and an upper support permeate outlet is provided, wherein the lower support and the upper support provided between the separation membrane for separating the permeate and concentrate water to be treated, the the separation layer provided between the lower support, between the separation layer and the lower support and the characterized by comprising a first sheet-like elastic member for sealing between the said and the lower support upper support.
[0007]
　According to this configuration, it seals between the lower support and the upper support by a first sheet-like elastic member without providing the groove for accommodating the sealing member, when the sheet-like elastic member as a sealing member was deteriorated even, it is possible to prevent damage to the separation membrane.
[0008]
　In the membrane separation apparatus of the present invention is provided between the separation layer and the upper support, further comprising a second sheet-like elastic member for sealing between said upper support and the lower support and features. With this configuration, it is possible to efficiently seal between the lower support and the upper support.
[0009]
　In the membrane separation apparatus of the present invention, the first sheet-like elastic member and the second sheet-like elastic member is preferably disposed so as to cover the corner portion of the opening portion of the lower support. With this configuration, since the first sheet-like elastic member and the second sheet-like elastic member to protect the corners of the lower support, it is possible to prevent contact with the corner portion of the separation film and the lower support, the separation membrane it is possible to prevent the damage efficiently.
[0010]
　In the membrane separation apparatus of the present invention, the lower support includes a treated water inlet portion to which the treatment water inlet and the concentrated water outlet is provided, wherein between the separation membrane and the water to be treated inlet portion disposed between said supplies to the separation membrane treatment water supplied from the treated water inlet, the primary flow path for supplying concentrated water concentrated by the isolation layer to the concentrated water outlet a primary flow path portion provided, the disposed treated water inlet portion on, it is preferable that the and the lower support portion for supporting the treated water inlet portion is laminated. With this configuration, such as when the error occurs when the lower support, it is possible to solve the problem of the lower support simply by replacing the treated water inlet portion is causing the failure or the primary flow path portion improves the maintainability of the membrane separator. Further, even when there is demand for such structural modification of a membrane separation apparatus according to water quality change of the water to be treated, it is possible to cope with only the exchange of necessary parts.
[0011]
　In the membrane separation apparatus of the present invention, the upper support, the a permeate outlet permeate discharge section provided, disposed between the separation membrane and the permeate discharge unit, the permeate discharge a permeate passage section permeate flow path is provided for supplying the permeate to the parts, is disposed on the permeate discharge portion, it is preferable that the upper support portion for supporting the permeate discharge portion is stacked . By this configuration, it supports the separation membrane by permeation water flow path portion, only a defect in the upper support such as when caused to exchange causes and going on permeate flow path portion or the permeate discharge portion of the defect in it is possible to solve the problem of the upper support, improved maintenance of the membrane separator. Further, even when there is demand for such structural modification of a membrane separation apparatus according to water quality change of the water to be treated, it is possible to cope with only the exchange of necessary parts.
[0012]
　In the membrane separation apparatus of the present invention, the first sheet-like elastic member, fluorine rubber, nitrile butyl rubber, and preferably contains at least one rubber consisting hydride nitrile rubber. With this configuration, it is possible to efficiently seal between the upper support and the lower support.
Effect of the invention
[0013]
　According to the present invention, even when the seal member is deteriorated, it is possible to realize a membrane separation apparatus which can prevent damage to the separation membrane.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014]
[1] Figure 1 is a schematic sectional view of a membrane separation apparatus according to a first embodiment of the present invention.
FIG. 2 is a schematic plan view of the lower support portion of the membrane separation apparatus according to a first embodiment of the present invention.
FIG. 3 is a schematic plan view of the water to be treated inlet portion of the membrane separation apparatus according to a first embodiment of the present invention.
[4] FIG. 4 is a schematic plan view of the lower channel portion of the membrane separation apparatus according to a first embodiment of the present invention.
FIG. 5 is a schematic plan view of the primary-side flow path of the membrane separation apparatus according to a first embodiment of the present invention.
FIG. 6 is a schematic plan view of the upper support portion of the membrane separation apparatus according to a first embodiment of the present invention.
[7] FIG. 7 is a schematic plan view of a permeate discharge portion of the membrane separation apparatus according to a first embodiment of the present invention.
[8] FIG. 8 is a schematic plan view of a permeate flow path of the membrane separation apparatus according to a first embodiment of the present invention.
[9] FIG. 9 is a schematic plan view of a secondary-side flow path of the membrane separation apparatus according to a first embodiment of the present invention.
[10] FIG 10 is a cross-sectional schematic view of a membrane separation apparatus according to a second embodiment of the present invention.
DESCRIPTION OF THE INVENTION
[0015]
　Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is not intended to be limited to the following embodiments can be implemented by appropriate modifications. Further, the following embodiments can be implemented in appropriate combination. Further, component elements corresponding to those in each embodiment are denoted by the same reference numerals to avoid duplication of description.
[0016]
　Figure 1 is a schematic sectional view of a membrane separation apparatus according to a first embodiment of the present invention. As shown in FIG. 1, the membrane separation apparatus 1 according to this embodiment includes a lower support 11, and the upper support 12, the separation membrane is provided between the lower support 11 and the upper support 12 13 If, disposed between the lower support 11 and the separation membrane 13, a sheet-like elastic member 14 to seal between and between the upper support 12 and lower support 11 of the separation membrane 13 and the lower support member 11 equipped with a.
[0017]
　Lower support 11 generally has a rectangular parallelepiped shape, constituted by a resin material and stainless plurality of plate members are stacked. Lower support 11 includes a lower support 111, provided on the lower support portion 111, the concentrated water that has been concentrated in the treated water inlet 112a and the separation membrane 13 of the water to be treated filtration treatment by a separation membrane 13 water to be treated introduced 112 concentrated water discharge port 112b are provided for discharging, provided on the treated water inlet 112, the treated water flow passage 113a and supplying water to be treated towards the separation membrane 13 a lower channel section 113 which concentrated water path 113b for discharging the filtered filtered water is provided in the separation membrane 13, provided between the lower channel portion 113 and the separation membrane 13, to be processed on the separation membrane 13 water supplies, and a separation membrane 13 primary channel portion 114 that the primary flow path 114a for discharging the concentrated retentate is provided with. Within surrounded by the isolation film 13 and the primary-side channel section 114 and the lower channel section 113 space, a spacer 115 to secure a flow path for water to be treated and the concentrated water in the space is arranged. In the present embodiment, an example will be described lower support 11 is generally rectangular parallelepiped, the shape of the lower support 11 may be appropriately changed.
[0018]
　Thus, in the membrane separation apparatus 1 according to this embodiment, lower support 11, a plurality of such lower support 111, the treated water inlet 112, the lower channel section 113 and the primary-side channel section 114 by being constituted by a member, for example, even when a trouble such as such as the scale is closed occurs in concentrated water discharge port 112b of the treatment water introduction unit 112 has occurred, the process of the trouble occurs it is possible to solve the problem by simply replacing only such water inlet portion 112 and the lower channel portion 113, thus improving maintainability. Further, even when there is demand for structural changes in the membrane separation apparatus 1 associated with water quality variations of the water to be treated, it is possible to cope with only by replacing the necessary portion of the lower support 11.
[0019]
　Figure 2 is a schematic plan view of the lower support portion 111 of the membrane separation apparatus 1 according to this embodiment. As shown in FIG. 2, the lower support 111 is composed of a plate-shaped member of generally rectangular shape in plan view. Lower support 111 supports the treatment water inlet portion 112 from the lower surface side of the membrane separation apparatus 1.
[0020]
　Figure 3 is a schematic plan view of the water to be treated inlet portion 112 of the membrane separation apparatus 1 according to this embodiment. As shown in FIG. 3, the water to be treated inlet portion 112 is composed of a plate-shaped member of generally rectangular shape in plan view. Treatment water inlet 112a and the concentrated water discharge port 112b of the treatment water inlet portion 112 is provided as substantially parallel notches extending toward the center portion from one end portion of the for-treatment water inlet portion 112. The provision of the treated water inlet 112a and the concentrated water discharge port 112b, the treatment water introduced from the treated water inlet 112a at one end of the water to be treated inlet portion 112 toward the separation membrane 13 is supplied, concentrated water concentrated by the separation membrane 13 is discharged from the one end of the water to be treated inlet portion 112 through the concentrated water outlet 112b.
[0021]
　Figure 4 is a schematic plan view of the lower channel portion 113 of the membrane separation apparatus 1 according to this embodiment. As shown in FIG. 4, the lower channel portion 113 is composed of a plate-shaped member of generally rectangular shape in plan view. Treated water flow passage 113a and concentrated water flow passage 113b of the lower channel portion 113 is provided as substantially parallel slit-shaped opening in the central portion of the lower channel portion 113. The processed water path 113a and concentrated water passage 113b, when a laminate of the treated water inlet 112 and the lower channel section 113, the treated water inlet 112a and the concentrated water discharge treated water inlet portion 112 It is provided so as to overlap the outlet 112b. The provision of the treated water flow passage 113a and concentrated water path 113b, together with the treated water supplied from the treated water inlet 112 is supplied toward the separation membrane 13 through the treated water flow passage 113a , concentrated water concentrated by the separation membrane 13 is supplied toward the concentrated water discharge port 112b of the treatment water inlet portion 112 through a concentrated water path 113b.
[0022]
　Figure 5 is a schematic plan view of the primary-side channel portion 114 of the membrane separation apparatus 1 according to this embodiment. As shown in FIG. 5, the primary channel portion 114 is composed of a plate-shaped member of generally rectangular shape in plan view. Primary flow path 114a of the primary-side channel section 114 is provided as an opening of outline oval in plan view. Further, the primary flow path 114a is the area from the separation membrane 13 in plan view is provided smaller. Furthermore, the primary flow path 114a, when a laminate of a lower channel section 113 and the primary-side channel section 114 is provided so as to overlap with the processed water flow passage 113a and concentrated water flow passage 113b of the lower channel portion 113 . By thus providing the primary flow path 114a, together with the treated water supplied from the lower flow path 113 is supplied toward the separation membrane 13 via the primary flow path 114a, concentrated in the separation membrane 13 enriching water is supplied toward the lower flow path portion 113 through the primary flow path 114a.
[0023]
　Upper support 12 generally has a rectangular parallelepiped shape, constituted by a resin material and stainless plurality of plate members are stacked. Transmitting the upper support 12, an upper support portion 121, the (in Fig. 1 below) upper upper support 121 is provided on, the permeate outlet 122a of filtration permeate water in the separation membrane 13 is provided a water discharge portion 122 provided (downward in FIG. 1) this permeate discharge portion 122 above permeate passage 123a for guiding the permeate towards the permeate outlet 122a of the permeate discharge portion 122 from the separation membrane 13 is a permeate passage portion 123 provided, provided between the permeate path portion 123 and the separation membrane 13, the secondary-side flow path 124a for discharging the filtered water filtered by the separation membrane 13 is provided and a secondary-side channel section 124. Within surrounded by the separation membrane 13 and the permeate passage 123 and the secondary-side channel section 124 space, a spacer 125 to secure a flow path of the permeate in the inner space is arranged. Thus, by the upper support 12 is constituted by a plurality of members such as the upper support portion 121, the permeate discharge portion 122, permeate channel portion 123 and secondary channel 124, for example, permeate flow even if a trouble such as clogging of the permeate flow path 123a of the road section 123 has occurred, to solve the problem by simply replacing only the like permeate discharge portion 122 and the permeate flow path portion 123 the trouble occurs since it is, maintenance is improved. Further, even when there is demand for structural changes in the membrane separation apparatus 1 associated with water quality variations of the water to be treated, it is possible to cope with only by replacing the necessary portions of the upper support 12.
[0024]
　Figure 6 is a schematic plan view of the upper support portion 121 of the membrane separation apparatus 1 according to this embodiment. As shown in FIG. 6, the upper support portion 121 is composed of a plate-shaped member of generally rectangular shape in plan view. The upper support portion 121 supports the permeate discharge portion 122 from the upper surface side of the membrane separation apparatus 1.
[0025]
　Figure 7 is a schematic plan view of a permeate discharge portion 122 of the membrane separation apparatus 1 according to this embodiment. As shown in FIG. 7, the permeate discharge unit 122 is composed of a plate-shaped member of generally rectangular shape in plan view. Permeate outlet 122a of the permeate discharge portion 122 is provided as a substantially parallel notches extending toward the central portion from the other end of the permeate discharge portion 122. By providing such a permeated water outlet 122a, permeate that has passed through the separation membrane 13, the other end side of the permeate discharge portion 122 from the central portion via the permeate outlet 122a of the permeate discharge portion 122 It is discharged from.
[0026]
　Figure 8 is a schematic plan view of a permeate passage portion 123 of the membrane separation apparatus 1 according to this embodiment. As shown in FIG. 8, permeate passage unit 123 is composed of a plate-like member of generally rectangular shape in plan view. Permeate passage portion 123 is provided on substantially the same line toward the center portion from the other end side of the plurality of permeate flow path 123a of generally rectangular shape in plan view is permeate passage portion 123. Further, a plurality of permeate flow path 123a is provided so as to overlap with the permeate outlet 122a of the transparent discharge unit 122 in plan view. By providing such transparent water channel 123a, permeate water supplied to the permeate flow path portion 123 through the secondary passage 124a passes through the separation membrane 13, permeate through the permeate flow path 123a It is supplied to the permeate outlet 122a of the discharge portion 122. Further, by providing by classifying such transparent water flow path 123a into a plurality, it is possible to reduce the area of ​​the opening of the permeate flow path portion 123 due to permeate flow path 123a. Thus, the membrane separation apparatus 1, the lower support even when 11 times the high pressure from, deflected to the upper support 12 side by the application of pressure isolation film 13 in filtering water to be treated because they are supported by the non-opening portion of the permeate flow path section 123, it is possible to perform stable filtration.
[0027]
　Figure 9 is a schematic plan view of the secondary-side channel portion 124 of the membrane separation apparatus 1 according to this embodiment. The secondary-side channel section 124 is composed of a plate-shaped member of generally rectangular shape in plan view. Secondary flow path 124a of the secondary-side channel section 124 is provided as an opening of outline oval in plan view. The secondary-side flow path 124a is the area from the separation membrane 13 in plan view is provided smaller. Furthermore, the secondary-side flow path 124a is a transmissive water passage 123 and the secondary-side channel section 124 when stacked, is provided so as to overlap with the permeate passage 123a of permeate flow path portion 123. By thus providing the secondary flow path 124a, it permeate is transmitted from the separation membrane 13 is supplied toward the permeate flow path 123a through the secondary flow path 124a.
[0028]
　Separation membrane 13, for example, RO membrane (reverse osmosis membrane), UF membrane (ultrafiltration separation membrane) and MF membrane (precision separation membrane) and the like. Separation membrane 13 is arranged to overlap between the non-opening portion of the non-opening portion and the secondary-side flow path portion 124 at both ends in cross section the primary-side channel section 114. Separation membrane 13, together with the permeate contaminants and salt have been removed in the water to be treated passes through the treated water is obtained, and concentrated water which such contaminants and salt in the water to be treated is enriched. The thickness of the separation membrane 13, for example, is 0.05mm or 2mm or less.
[0029]
　Sheet elastic member 14 is disposed between the separation membrane 13 and the primary-side channel section 114. The sheet-like elastic member 14 is not particularly limited as long as it can be used as a buffer between the separation membrane 13 and the primary-side channel section 114. The sheet-like elastic member 14, for example, nitrile rubber, fluorine rubber and hydrogenated nitrile rubber can be used. Among them, as the sheet-like elastic member 14, from the viewpoint of chemical resistance, such as fluorine rubber and hydrogenated nitrile rubber are preferable. Sheet elastic member 14 has one end side is arranged so as to cover the both end portions of the lower surface side of the separation membrane 13 in cross section. By thus placing the sheet-like elastic member 14, even when the sheet-like elastic member 14 is deteriorated, present as a layer of elastic members between the separation membrane 13 and the sheet-like elastic member 14, separated it is possible to avoid the surface contact between the film 13 and the lower support member 11, it is possible to prevent damage to the separation membrane 13. The thickness of the sheet-like elastic member 14, for example, but is 0.25mm or more 0.75mm or less is not particularly limited.
[0030]
　As described above, according to the membrane separation apparatus 1 according to the embodiment, and between the lower support of the sheet-like elastic member 14 without providing the groove for accommodating the seal member and the separation membrane 13 and the lower support member 11 because sealing between the body 11 and the upper support 12, even when the sheet-like elastic member 14 as a sealing member is deteriorated, it is possible to prevent damage to the separation membrane 13.
[0031]
　Further, according to the membrane separation apparatus 1 according to the embodiment, lower support 11, a lower support 111, the treated water inlet 112, the lower channel portion 113, and the primary-side channel section 114 are stacked since Te, the like if error occurs when a portion of the lower support 11, the lower is the cause of the failure support 111, the treated water inlet 112, the lower channel portion 113, and the primary side because simply by replacing the flow path unit 114 can be eliminated a problem of the lower support 11, thereby improving the maintainability of the membrane separation apparatus 1. Further, even when there is demand for such structural modifications caused by the quality variations of the water to be treated, it is possible to structure changes only the exchange of necessary parts.
[0032]
　Furthermore, according to the membrane separation apparatus 1 according to the above embodiment, the upper support 12, the upper support portion 121, the permeate discharge portion 122, permeate channel 123, and secondary-side flow path 124 is stacked since Te, the like if error occurs when a portion of the upper support 12, and upper support 121 are responsible of the problem, the permeate discharge portion 122, permeate channel portion 123, and the secondary side because simply by replacing the flow path unit 124 can be eliminated a problem of the upper support 12, thereby improving the maintainability of the membrane separation apparatus 1. Further, even when there is demand for such structural modifications caused by the quality variations of the water to be treated, it is possible to structure changes only the exchange of necessary parts.
[0033]
　In the above embodiment, the lower support 11, a lower support 111, the treated water inlet 112, but lower channel portion 113, and the primary-side channel section 114 has been described an example stacked, lower flow path section 113 need not necessarily be provided.
[0034]
(Second Embodiment)
　Next explained is the second embodiment of the present invention. In the following, the description will focus on differences from the first embodiment described above, avoid duplication of description. Further, the components in common with the first embodiment described above will be omitted.
[0035]
　Figure 10 is a film cross-sectional schematic view of the separation device 1 according to a second embodiment of the present invention. As shown in FIG. 10, the membrane separation apparatus 1 according to this embodiment, in place of the sheet-like elastic member 14 of the membrane separation apparatus 1 described above, disposed between the separation membrane 13 and the lower support member 11 It comprises a first sheet-like elastic member 21, a second sheet-like elastic member 22 disposed between the separation film 13 and the upper support 12. Further, in the opening portion 114a of the primary-side flow path portion 114 is arranged a spacer 115, is in the opening 124a of the secondary-side channel portion 124 is arranged a spacer 125. For identical to the membrane separation apparatus 1 according to the first embodiment described above for other configurations omitted.
[0036]
　As the first sheet-like elastic member 21, similarly to the sheet-like elastic member 14 according to the first embodiment described above, for example, nitrile rubber, fluorine rubber and hydrogenated nitrile rubber can be used. The first sheet-like elastic member 21 is arranged from both ends of the lower support 11 so as to cover a portion of the spacer 115. The first sheet-like elastic member 21 has a larger area than the upper surface of the primary flow passage portion 114 of the lower support 11. The spacer 115 is intended to ensure the flow path of the water to be treated and concentrated water, and the formed resin material. Further, by arranging the first sheet-like elastic member 21, contact between the corner portion 114b of the separation membrane 13 and spacer 115 in the opening 114a of the primary-side flow path 114 and the primary-side channel section 114 it is possible to prevent, it is possible to prevent breakage of the separation membrane 13 efficiently.
[0037]
　As the second sheet-like elastic member 22, similarly to the sheet's elastic member 14 according to the first embodiment described above, for example, nitrile rubber, fluorine rubber and hydrogenated nitrile rubber can be used. The second sheet-like elastic member 22 is disposed from both ends of the upper support 12 so as to cover a portion of the spacer 125. The second sheet-like elastic member 22 has a larger area than the bottom surface of the secondary-side channel portion 124 of the upper support 12. The spacer 125 is intended to ensure the flow path of the water to be treated and concentrated water, and the formed resin material. By arranging the second sheet-like elastic member 22, contact between the corner portion 124b of the separation membrane 13 and spacer 125 in the opening 124a of the secondary-side flow path 124 and the secondary-side channel section 124 it is possible to prevent, it is possible to prevent breakage of the separation membrane 13 efficiently.
DESCRIPTION OF SYMBOLS
[0038]
　1, the membrane separation means
　11 support a lower
　a lower support portion 111
　112 untreated water inlet portion
　112a untreated water inlet port
　112b concentrated water discharge port
　113 portion of the lower flow path
　113a treated water flow passage
　114 primary-side flow passage
　114a opening portion
　114b corner portion
　115 Spectraporeーthose have
　an upper portion 12 support member
　121 an upper support portion
　122 is discharged through the water portion
　122a permeated water discharge port
　123 through the flow passage portion
　123a through the flow passage
　124 of the secondary-side flow passage portion
　124a opening portion
　124b corner portion
　125 Spectraporeーthose have
　13 separation
　14 SiliconeーSuites shape of Tan member
　21 of the first exemplary Tan SiliconeーSuites like member
　22 of the second exemplary Tan Siliconeーshaped member Suites

The scope of the claims
[Claim 1]
　A lower support treated water inlet and the concentrated water outlet is provided,
　and an upper support permeate outlet is provided,
　provided between the upper support and the lower support, treated a separation membrane for separating water into permeate and concentrate,
　the separation membrane and provided between the lower support, the separation film and the upper support, and between the lower support and the lower support characterized by comprising a first sheet-like elastic member to seal between the membrane separation device.
[Claim 2]
　Wherein provided between the upper substrate and the separation membrane, comprising a second sheet-like elastic member for sealing between the lower support and the upper support, the membrane separation apparatus according to claim 1.
[Claim 3]
　The first sheet-like elastic member and the second sheet-like elastic member is disposed so as to cover the corner portions of the opening portion of the lower support, the membrane separation apparatus according to claim 2.
[Claim 4]
　The lower support is the water to be treated introducing part treated water inlet and the concentrated water outlet is provided, wherein disposed between the separation membrane and the object water inlet section, the water to be treated the treated water supplied from the inlet is supplied to the separation membrane, and the one primary flow path for supplying concentrated water concentrated by the separation membrane in the concentrated water outlet is provided primary channel portion the disposed treated water inlet portion on the a lower support portion for supporting the treated water inlet portion is laminated becomes, the membrane separation apparatus according to any one of claims 1 to 3.
[Claim 5]
　Said upper support, said a permeate outlet permeate discharge section provided, wherein disposed between the permeate discharge portion and the separation membrane, permeate flow supplying permeate to the permeate discharge portion a permeate passage portion road is provided, is disposed on the permeate discharge portion, and an upper support portion that supports the permeate discharge portion are laminated, one of claims 1 to 4 1 membrane separation apparatus according to claim.
[Claim 6]
　The first sheet-like elastic member, fluorine rubber, nitrile butyl rubber, containing at least one rubber consisting hydrogenated nitrile rubber, membrane separation device according to any one of claims 1 to 5.