WO2012046388A1 - 分離膜モジュール - Google Patents
分離膜モジュール Download PDFInfo
- Publication number
- WO2012046388A1 WO2012046388A1 PCT/JP2011/005140 JP2011005140W WO2012046388A1 WO 2012046388 A1 WO2012046388 A1 WO 2012046388A1 JP 2011005140 W JP2011005140 W JP 2011005140W WO 2012046388 A1 WO2012046388 A1 WO 2012046388A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- separation membrane
- end member
- pressure vessel
- membrane module
- membrane element
- Prior art date
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 195
- 238000000926 separation method Methods 0.000 title claims abstract description 189
- 239000012530 fluid Substances 0.000 claims abstract description 5
- 230000002093 peripheral effect Effects 0.000 claims description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 238000007789 sealing Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 description 22
- 239000000463 material Substances 0.000 description 18
- 230000004048 modification Effects 0.000 description 10
- 238000012986 modification Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- 238000012856 packing Methods 0.000 description 6
- 239000012466 permeate Substances 0.000 description 4
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- 229920005549 butyl rubber Polymers 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000001728 nano-filtration Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- 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
- 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
- B01D63/106—Anti-Telescopic-Devices [ATD]
-
- 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
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/04—Specific sealing means
- B01D2313/041—Gaskets or O-rings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/08—Flow guidance means within the module or the apparatus
- B01D2313/083—Bypass routes
Definitions
- the present invention relates to a separation membrane module in which a plurality of separation membrane elements are inserted into a cylindrical pressure vessel.
- Patent Document 1 discloses a separation membrane module 10 as shown in FIGS. 12 and 13.
- the separation membrane module 10 includes a cylindrical pressure vessel 11 and a plurality of separation membrane elements 12 inserted into the pressure vessel 11 in a row. Then, as shown by arrows in FIG. 12, when raw water is supplied into the pressure vessel 11 from one end of the separation membrane module 10, the raw water is permeated and concentrated by the separation membrane of the separation membrane element 12. And are separately discharged from the other end of the separation membrane module 10.
- Each separation membrane element 12 has a laminated body including a separation membrane wound around a central tube, and a pair of end members 13 arranged so as to sandwich the laminated body.
- a substantially U-shaped packing 15 is attached.
- the packing 15 has an outer diameter equivalent to the diameter of the inner peripheral surface of the pressure vessel 11 even in a natural body where no upstream pressure acts. For this reason, conventionally, when the separation membrane element 12 is inserted into the pressure vessel 11, the separation membrane element 12 is moved while rubbing the packing 15 crushed by the weight of the separation membrane element 12 against the inner peripheral surface of the pressure vessel 11. It was pushed into the pressure vessel 11.
- an object of the present invention is to provide a separation membrane module in which a separation membrane element can be easily inserted into a pressure vessel.
- the present invention has a cylindrical pressure vessel, a separation membrane, and a first end member and a second end member arranged with the separation membrane interposed therebetween, A plurality of separation membrane elements inserted so that the first end member and the second end member are alternately arranged in the axial direction of the pressure vessel, and one of the adjacent first end member and second end member Or an annular seal member that is attached to both sides, and that fits inside the maximum diameter of the attached first end member and / or the second end member, and the seal member is adjacent to each other.
- a separation membrane module which is deformed by contact between the matching separation membrane elements or supply of a pressurized fluid into the pressure vessel and is in close contact with the inner peripheral surface of the pressure vessel.
- the “normal time” means a state in which the sealing member is kept in a free natural shape only attached to the first end member and / or the second end member (hereinafter simply referred to as “end member”), That is, the seal member mounted on the end member is not deformed by an external force.
- the seal member normally fits inside the maximum diameter of the end member, the separation membrane element can be easily inserted into the pressure vessel while sliding the end member on the inner peripheral surface of the pressure vessel. can do. Then, when the next separation membrane element is arranged at a regular position or when all the separation membrane elements are arranged at a regular position and raw water is supplied into the pressure vessel, the seal member is deformed and the separation membrane element is deformed. And the inner peripheral surface of the pressure vessel are sealed.
- Sectional drawing of the separation membrane module which concerns on 1st Embodiment of this invention Configuration diagram of spiral-type separation membrane element as an example of separation membrane element 3A is an enlarged cross-sectional view showing a state before the separation membrane elements are connected to each other, and FIG. 3B is an enlarged cross-sectional view showing a state after the separation membrane elements are connected to each other.
- 4A is a schematic diagram showing the flow of raw water in the downstream pressurization type separation membrane module
- FIG. 4B is a schematic diagram showing the flow of raw water in the upstream pressurization type separation membrane module.
- 5A and 5B are diagrams showing a separation membrane module according to a modification of the first embodiment.
- FIG. 5A is an enlarged cross-sectional view showing a state before the separation membrane elements are connected to each other.
- FIG. Enlarged sectional view showing the state after 6A and 6B are views showing a separation membrane module according to a second embodiment of the present invention
- FIG. 6A is an enlarged cross-sectional view showing a state before the separation membrane elements are connected
- FIG. 6B is a view showing separation membrane elements.
- Enlarged sectional view showing the state after connecting 7A and 7B are diagrams showing a separation membrane module according to a modification of the second embodiment.
- FIG. 7A is an enlarged cross-sectional view showing a state before the separation membrane elements are connected to each other.
- FIG. 8A and 8B are diagrams showing a separation membrane module according to a third embodiment of the present invention.
- FIG. 8A is an enlarged sectional view showing a state before the separation membrane elements are connected to each other
- FIG. 11A and 11B are views showing a separation membrane module according to a fourth embodiment of the present invention
- FIG. 11A is an enlarged sectional view showing a state before raw water is supplied into the pressure vessel
- FIG. 11B is inside the pressure vessel.
- FIG. 12 is an enlarged view of the main part
- FIG. 1 shows a separation membrane module 1A according to the first embodiment of the present invention.
- This separation membrane module 1 ⁇ / b> A includes a cylindrical pressure vessel 7 called a vessel and a plurality of separation membrane elements 2 inserted into the pressure vessel 7.
- Disc-shaped caps 8 and 9 are attached to both ends of the pressure vessel 7.
- a supply pipe 81 for supplying raw water into the pressure vessel 7 is provided at a position shifted from the center.
- the other (right side in FIG. 1) cap 9 is provided with a first discharge pipe 91 for taking out permeate at the center, and a second discharge pipe 92 for taking out concentrated water at a position shifted from the center. Is provided. That is, a flow of raw water from one cap 8 toward the other cap 9 is formed in the pressure vessel 7.
- the supply pipe 81 and the second discharge pipe 92 may be provided in the pressure vessel 7.
- the separation membrane element 2 may be, for example, a spiral ultrafiltration membrane element or other cylindrical element.
- Each separation membrane element 2 includes a central tube 21 that functions as a water collection tube, a laminated body 22 that is wound around the central tube 21, and a first end member 3 and a second end that are disposed with the laminated body 22 interposed therebetween.
- the member 4 and the exterior material 28 surrounding the laminated body 22 are included.
- the 1st end member 3 and the 2nd end member 4 also play the role which prevents the laminated body 22 extending
- the separation membrane element 2 is inserted into the pressure vessel 7 in such a direction that the first end member 3 is located on the upstream side and the second end member 4 is located on the downstream side.
- the first end member 3 and the second end member 4 are alternately arranged in the axial direction of the pressure vessel 7.
- the first end member 3 and the second end member 4 are brought into close contact with each other by the coupler 61 in which the adjacent separation membrane elements 2 are fitted in the central pipes 21 of both separation membrane elements 2.
- the adjacent separation membrane elements 2 are connected in a state of being in direct contact with each other.
- a plug 62 is attached to the end of the separation membrane element 2 located on the most upstream side of the central tube 21 on the side opposite to the coupler 61 so that the raw water is prevented from flowing into the central tube 21.
- the central pipe 21 of the separation membrane element 2 located on the most downstream side is connected to the first discharge pipe 91 by the second connector 63.
- a plurality of introduction holes through which permeated water flows are formed in the center tube 21 of each separation membrane element 2.
- the laminated body 22 has a rectangular shape in which the winding direction is one opposite side direction, and a membrane member in which separation membranes 23 are overlapped on both surfaces of the permeate channel material 24 and the raw water channel material 25. Including. In the membrane member, the separation membranes 23 are joined to each other at three sides so as to have a bag shape opened in one direction, and the opening communicates with the introduction hole of the central tube 21.
- the permeate flow path member 24 is a net made of, for example, a resin, and forms a flow path for allowing permeate to flow between the separation membranes joined to each other.
- the raw water channel material 25 is, for example, a net made of resin (a net having a mesh size larger than that of the permeated water channel material 24), and forms a channel for flowing raw water between the surrounding portions of the wound membrane member. To do.
- Examples of the material constituting the separation membrane 23 include aromatic polyamides excellent in pressure reduction, polyvinyl alcohols excellent in permeability, and sulfonated polyether sulfones suitable for nanofiltration membranes.
- the first end member 3 includes an inner cylindrical portion 31 that is externally fitted to the end portion of the central tube 21, and an outer cylindrical portion that is concentric with the inner cylindrical portion 31 and surrounds the inner cylindrical portion 31 while being spaced apart. 32.
- the inner cylinder part 31 and the outer cylinder part 32 are connected by an annular plate (both not shown) in which a plurality of ribs or through-holes are formed, whereby the inner cylinder part 31 and the outer cylinder part 32 are connected.
- a circulation port is formed through the first end member 3 to circulate the raw water.
- the second end member 4 is concentric with the inner cylindrical portion 41 that surrounds the inner cylindrical portion 41 while being spaced apart from the inner cylindrical portion 41 that is externally fitted to the end portion of the central tube 21. And an outer cylindrical portion 42.
- the inner cylinder part 41 and the outer cylinder part 42 are connected by an annular plate (both not shown) in which a plurality of ribs or through-holes are formed, whereby the inner cylinder part 41 and the outer cylinder part 42 are connected.
- a distribution port is formed through which the raw water passes through the second end member 4.
- the first end member 3 adjacent to the second end member 4 that is, the first end member 3 of the separation membrane element 2 other than the separation membrane element 2 located on the most upstream side
- An annular seal member 5A is attached.
- the first end member 3 of the separation membrane element 2 located on the most upstream side is fitted with a packing 15 having a substantially U-shaped cross section as in the conventional case.
- the first end member 3 of the separation membrane element 2 located on the most upstream side is also formed in the same shape as the other first end members 3.
- the second end member 4 adjacent to the first end member 3 that is, the second end member 4 of the separation membrane element 2 other than the separation membrane element 2 located on the most downstream side.
- a pressing portion 40 for pressing the seal member 5A.
- the second end member 4 of the separation membrane element 2 located on the most downstream side is also formed in the same shape as the other second end members 4.
- the second end member 4 of the separation membrane element 2 located on the most downstream side may have a shape that does not have the pressing portion 40 (for example, the same shape as the first end member 3).
- the outer cylindrical portion 32 of the first end member 3 has a guide portion 33 that fits inside the exterior material 28 and a flange portion 34 that restricts the movement of the exterior material 28 in the axial direction.
- the flange portion 34 projects outward in the radial direction from the exterior material 28, and the maximum diameter of the first end member 3 is defined by the outer peripheral surface of the flange portion 34.
- the flange 34 has an outer end surface facing the side opposite to the exterior material 28 (that is, orthogonal to the axial direction of the pressure vessel 7), and the seal member 5A is connected to the second end member 4 by this outer end surface. Supported from the other side.
- the outer cylindrical portion 32 has a small diameter portion 35 that holds the seal member 5A from the inside, and a protrusion that protrudes radially outward from the tip of the small diameter portion 35 to prevent the seal member 5A from coming out of the small diameter portion 35.
- Part 36 the flange 34, the small diameter portion 35, and the protrusion 36 form a groove for mounting the seal member 5 ⁇ / b> A extending in the circumferential direction.
- the seal member 5A has an outer diameter that fits inside the maximum diameter of the first end member 3 (normally) when the seal member 5A is kept in a free natural shape only attached to the first end member 3. is doing. That is, the outer diameter of the natural seal member 5 ⁇ / b> A is slightly smaller than the maximum diameter of the first end member 3. Then, the seal member 5 ⁇ / b> A is deformed by the contact between the adjacent separation membrane elements 2 and is brought into close contact with the inner peripheral surface 7 a of the pressure vessel 7.
- the seal member 5A used in this embodiment exemplifies a hollow elastic body, but may not be hollow.
- the cross-sectional shape of the seal member 5A is preferably circular, but may be polygonal.
- synthetic rubber such as nitrile rubber (NBR), ethylene propylene rubber (EPDM), silicone rubber, fluorine rubber, butyl rubber (IIR), or natural rubber can be used.
- the hardness of the seal member 5A is preferably in the range of 30 to 80 in Shore hardness, and more preferably in the range of 40 to 60. If the hardness is too high, it will be easily broken when pressed, and if the hardness is too low, it will not be able to withstand the pressure of the fluid and the sealing function will be insufficient.
- the outer cylindrical portion 42 of the second end member 4 has a guide portion 43 that fits inside the exterior material 28 and a flange portion 44 that restricts the movement of the exterior material 28 in the axial direction.
- the flange portion 44 projects outward in the radial direction from the exterior material 28, and the maximum diameter of the second end member 4 is defined by the outer peripheral surface of the flange portion 44.
- the maximum diameter of the second end member 4 may be the same as or different from the maximum diameter of the first end member 3.
- the outer cylindrical portion 42 is integrally formed with a cylindrical protruding portion that protrudes from an end surface facing the first end member 3 at a position corresponding to the seal member 5A attached to the first end member 3.
- the above-described pressing portion 40 is configured by this protruding portion.
- the pressing portion 40 has a flat front end surface that is parallel to the end surface of the outer cylindrical portion 42. That is, as shown in FIG. 3B, the pressing portion 40 presses the seal member 5A in the axial direction of the pressure vessel 7 and crushes in that direction when the adjacent separation membrane elements 2 are connected and contact each other.
- the seal member 5 ⁇ / b> A is pressed against the inner peripheral surface 7 a of the pressure vessel 7.
- a flow path 20 is formed between the first end member 3 and the second end member 4 to guide the raw water that has passed through the separation membrane element 2 to the periphery of the separation membrane element 2.
- the flow path 20 can be comprised by the groove
- the pressing portion 40 is provided with a through-hole that penetrates the pressing portion 40 in the radial direction, and a space between the separation membrane element 2 and the inner peripheral surface 7a of the pressure vessel 7 is formed by the through-hole.
- a communication path 40 a communicating with the flow path 20 is configured.
- the separation membrane module 1A is a downstream pressurization type separation that applies the pressure of raw water after passing through the separation membrane element 2 to the outer surface of the exterior member 28 of each separation membrane element 2. It is a membrane module. Thereby, it is possible to prevent the separation membrane element 2 from being damaged by preventing a large pressure difference between the inside and outside of the separation membrane element 2 at the start of operation when the pressure of the raw water suddenly increases.
- the communicating path 40a may be configured by dividing the pressing portion 40 into a plurality of arc-shaped pieces and a gap formed between the pieces.
- the seal member 5A normally fits inside the maximum diameter of the first end member 3, so that the first end member 3 is placed on the inner peripheral surface 7a of the pressure vessel 7.
- the separation membrane element 2 can be easily inserted into the pressure vessel 7 while sliding. Then, when the next separation membrane element 2 is disposed at the normal position, the seal member 5A is deformed and the gap between the separation membrane element 2 and the inner peripheral surface 7a of the pressure vessel 7 is sealed.
- the separation membrane element 2 may be inserted into the pressure vessel 7 in such a direction that the first end member 3 is located on the downstream side and the second end member 4 is located on the upstream side, contrary to the above embodiment. .
- an upstream pressurization type separation membrane module that applies the pressure of the raw water before passing through the separation membrane element 2 to the outer surface of the exterior member 28 of each separation membrane element 2 is realized. can do.
- the same packing 15 as the conventional one may be attached to the first end member 3 of the separation membrane element 2 located on the most downstream side.
- the flow path 20 is not formed between the first end member 3 and the second end member 4, and the pressure The communication path 40 a may not be provided in the portion 40.
- adjacent separation membrane elements 2 were connected in the state which the 1st end member 3 and the 2nd end member 4 contact
- the first end member 3 and the second end member 4 may be connected in a separated state by a coupler fitted to the center tube 21 from the outside. That is, the adjacent separation membrane elements 2 are not necessarily in direct contact with each other, and may be contacted via a coupler.
- a flow path 20 for guiding the raw water that has passed through the separation membrane element 2 to the periphery of the separation membrane element 2 is constituted by a gap formed between the first end member 3 and the second end member 4. Is done.
- the press part 40 was comprised by the protrusion part integrally molded by the 2nd end member 4, the press part 40 provided in the 2nd end member 4 is shown to FIG. 5A and 5B. Like the separation membrane module 1 ⁇ / b> B of the modification shown, it may be configured by another member supported by the second end member 4.
- the outer cylindrical portion 42 of the second end member 4 has the same shape as the flange portion 34, the small diameter portion 35, and the protruding portion 36 of the outer cylindrical portion 32 of the first end member 3. It has a flange portion 44, a small diameter portion 45, and a protruding portion 46.
- the pressing portion 40 is formed of a cylindrical member that is held from the inside by the protruding portion 46, and faces the side opposite to the exterior material 28 of the flange portion 44 (that is, orthogonal to the axial direction of the pressure vessel 7). ) It is supported from the opposite side to the first end member 3 by the outer end surface.
- FIGS. 6A and 6B a separation membrane module 1C according to a second embodiment of the present invention will be described with reference to FIGS. 6A and 6B.
- the same components as those described above are denoted by the same reference numerals, and description thereof is omitted. This is the same in the embodiments described later.
- the seal member 5B used in the present embodiment exemplifies a solid elastic body, but a hollow elastic body may be used.
- the cross-sectional shape of the seal member 5A is preferably circular, but may be polygonal.
- the material which can be used as the sealing member 5B, and preferable hardness are the same as that of 1st Embodiment.
- the seal member 5B is the maximum of the first end member 3 when it is kept in a free natural shape only attached to the first end member 3 (normally). It has an outer diameter that fits inside the diameter. That is, the outer diameter of the natural seal member 5 ⁇ / b> B is slightly smaller than the maximum diameter of the first end member 3. The seal member 5 ⁇ / b> B is deformed by contact between the adjacent separation membrane elements 2 and is in close contact with the inner peripheral surface 7 a of the pressure vessel 7.
- the outer cylindrical portion 42 of the second end member 4 protrudes from an end surface facing the first end member 3 at a position corresponding to the seal member 5B attached to the first end member 3.
- a cylindrical projecting portion is integrally formed, and the pressing portion 40 is configured by the projecting portion.
- the outer peripheral surface of the pressing portion 40 is a tapered surface that decreases in diameter as it moves away from the end surface of the outer cylindrical portion 42. That is, as shown in FIG. 6B, the pressing portion 40 is deformed so that when the adjacent separation membrane elements 2 are connected and brought into contact with each other, the sealing member 5B is pressed radially outward to expand the diameter, The seal member 5B is pressed against the inner peripheral surface 7a of the pressure vessel 7.
- natural water which passed through the separation membrane element 2 formed between the 1st end member 3 and the 2nd end member 4 is made into the press part 40 around the separation membrane element 2 similarly to 1st Embodiment.
- a communication path 40 a is provided that communicates the flow path 20 for guiding to the space with the space between the separation membrane element 2 and the inner peripheral surface 7 a of the pressure vessel 7.
- the separation membrane module 1C of the present embodiment can achieve the same effects as the separation membrane module 1A of the first embodiment.
- the pressing portion 40 provided on the second end member 4 is supported by the second end member 4 like the separation membrane module 1D of the modification shown in FIGS. 7A and 7B, similarly to the modification of the first embodiment. You may be comprised with another member. Needless to say, other modifications described in the first embodiment are applicable to the second embodiment.
- first end member 3 and the second end member 4 have a substantially symmetrical shape, and the first end member 3 and the second end member 4 that are adjacent to each other are connected to the first end member 3 and the second end member 4.
- An annular seal member 5 ⁇ / b> C is mounted across the second end member 4.
- a groove for attaching a seal member 5C extending in the circumferential direction is formed in the first end member 3 by the flange portion 34, the small diameter portion 35, and the protruding portion 36, and the second end member 4
- a groove for mounting the seal member 5 ⁇ / b> C extending in the circumferential direction is formed by the flange portion 44, the small diameter portion 45, and the protruding portion 46.
- the seal member 5C When the seal member 5C is kept in a free natural shape only attached to the first end member 3 and the second end member 4, the seal member 5C is the maximum of the first end member 3 and the second end member 4 (normally). It has an outer diameter that fits inside the diameter. That is, the outer diameter of the natural seal member 5 ⁇ / b> C is slightly smaller than the maximum diameters of the first end member 3 and the second end member 4. Then, as shown in FIG. 8B, when the adjacent separation membrane elements 2 are connected and come into contact with each other, the seal member 5C protrudes radially outward by the first end member 3 and the second end member 4. To be pressed against the inner peripheral surface 7 a of the pressure vessel 7. That is, the seal member 5C is deformed by the contact between the adjacent separation membrane elements 2 and is in close contact with the inner peripheral surface 7a of the pressure vessel 7 as in the first embodiment and the second embodiment.
- the seal member 5C includes a first ring portion 51 having a rectangular cross section, a second ring portion 52 having the same cross sectional shape as the first ring portion 51, a first ring portion 51, and a second ring portion 52. And a bridge portion 53 that bridges the outer wall in a radially outward direction.
- the first ring portion 51 is held by the first end member 3 by being inserted into a groove formed by the flange portion 34, the small diameter portion 35, and the protruding portion 36.
- the second ring portion 52 is held by the second end member 4 by being inserted into a groove formed by the flange portion 44, the small diameter portion 45, and the protruding portion 46.
- the first ring portion 51 is placed on one side of the pressure vessel by the outer end surface of the flange portion 34 of the first end member 3 facing away from the exterior material 28 ( The second ring portion 52 is pressed toward the other side (downstream side) of the pressure vessel by the outer end surface of the flange portion 44 of the second end member 4 facing away from the exterior material 28. .
- the bridge portion 53 has a length sufficiently longer than the total thickness of the protruding portion 36 and the protruding portion 46 in the axial direction of the seal member 5C.
- the separation membrane module 1E is a downstream pressurization type separation membrane module as shown in FIG. 4A.
- the through-hole 53a is provided in the downstream position rather than the center of the bridge part 53, an upstream pressurization type separation membrane module as shown to FIG. 4B is realizable.
- the through holes 53a are preferably arranged at equal angular intervals on the same circumference.
- the separation membrane module 1E of this embodiment when the separation membrane element 2 is inserted into the pressure vessel 7, the insertion operation is performed while maintaining the state where the adjacent separation membrane elements 2 are separated from each other by a certain distance. .
- the upstream separation membrane element 2 is pushed in while the downstream separation membrane element 2 is drawn.
- the seal member 5C is normally accommodated inside the maximum diameters of the first end member 3 and the second end member 4 on the inner peripheral surface 7a of the pressure vessel 7.
- the separation membrane element 2 can be easily inserted into the pressure vessel 7 while sliding the first end member 3 and the second end member 4. Then, when the next separation membrane element 2 is disposed at the proper position, the seal member 5C is deformed and the gap between the separation membrane element 2 and the inner peripheral surface 7a of the pressure vessel 7 is sealed.
- the bridge portion 53 of the seal member 5C does not necessarily have an arcuate cross-sectional shape as shown in FIGS. 8A and 8B.
- the bridge portion 53 has a V-shaped cross-sectional shape. It may be.
- the separation membrane module 1F of the present embodiment has the same configuration as the separation membrane module 1E of the third embodiment except for the shape of the seal member 5D.
- the seal member 5 ⁇ / b> D used in the present embodiment is configured such that it hardly deforms when the adjacent separation membrane elements 2 are connected to each other after being attached to the first end member 3 and the second end member 4.
- the seal member 5D In a state where the seal member 5D is kept in a free natural shape only attached to the first end member 3 and the second end member 4, it is the maximum of the first end member 3 and the second end member 4 (normally). It has an outer diameter that fits inside the diameter. That is, the outer diameter of the natural seal member 5 ⁇ / b> D is slightly smaller than the maximum diameters of the first end member 3 and the second end member 4. Then, as shown in FIG. 11B, after the adjacent separation membrane elements 2 are connected to each other, the pressure applied from one axial direction (the upstream side in the present embodiment) of the pressure vessel 7 is applied to the other axial direction of the pressure vessel 7.
- the seal member 5D When it becomes larger than the pressure applied from the downstream side (in this embodiment), the seal member 5D is deformed so as to project outward in the radial direction and is pressed against the inner peripheral surface 7a of the pressure vessel 7. That is, the seal member 5 ⁇ / b> D is deformed by the supply of raw water (pressurized fluid) into the pressure vessel 7 and closely contacts the inner peripheral surface 7 a of the pressure vessel 7.
- the seal member 5D includes a first ring part 51 having a trapezoidal cross section, a second ring part 52 having the same cross sectional shape as the first ring part 51, a first ring part 51, and a second ring part 52. And a bridge portion 53 for bridging.
- the cross-sectional shape of the 1st ring part 51 and the 2nd ring part 52 may be a rectangular shape similarly to 3rd Embodiment.
- the first ring portion 51 is held by the first end member 3 by being inserted into a groove formed by the flange portion 34, the small diameter portion 35, and the protruding portion 36.
- the second ring portion 52 is held by the second end member 4 by being inserted into a groove formed by the flange portion 44, the small diameter portion 45, and the protruding portion 46.
- the bridge portion 53 has a natural length of the seal member 5D in the axial direction of the seal member 5D, and the flange 34 and the second end of the first end member 3 when the adjacent separation membrane elements 2 are connected to each other.
- the length of the member 4 is approximately the same as the distance from the flange 44 of the member 4. That is, when the adjacent separation membrane elements 2 are connected and contacted, the bridge portion 53 hardly deforms.
- the bridge portion 53 is curved so that the center swells outward in the radial direction, but may be in a cylindrical shape parallel to the axial direction of the seal member 5D.
- the seal member 5 ⁇ / b> D may have a substantially Y-shaped cross section that does not include the second enlarged diameter portion 55.
- the bridge portion 53 has a first end member 3 and a first end located on a portion located on the opposite side (the other side in the axial direction of the pressure vessel 7) from the position where the enlarged diameter portion 54 extends from the position where the enlarged diameter portion 54 is connected.
- a flow path 20 that is formed between the two end members 4 and guides the raw water that has passed through the separation membrane element 2 to the periphery of the separation membrane element 2, and the separation membrane element 2 and the inner peripheral surface 7 a of the pressure vessel 7.
- a plurality of through holes 53a communicating with the space between them are provided. Therefore, contrary to the first embodiment, the separation membrane module 1F is an upstream pressurization type separation membrane module as shown in FIG. 4B.
- the enlarged diameter portion 54 forms an opening that opens toward the upstream side between the bridge portion 53 and spreads radially outward when raw water flows into the opening from the upstream side, as shown in FIG. 11B.
- the tip of the enlarged diameter portion 54 is pressed against the inner peripheral surface 7 a of the pressure vessel 7.
- the second ring portion 52 is displaced to the downstream side due to the pressure difference between the upstream side and the downstream side, and the bridge portion 53 is deformed so as to swell slightly outward in the radial direction. To do.
- the separation membrane element 2 when the separation membrane element 2 is inserted into the pressure vessel 7, the separation membrane element 2 is pushed in from one side (upstream side or downstream side) of the pressure vessel 7 in the axial direction. Can do.
- the seal member 5D is normally accommodated inside the maximum diameters of the first end member 3 and the second end member 4 on the inner peripheral surface 7a of the pressure vessel 7.
- the separation membrane element 2 can be easily inserted into the pressure vessel 7 while sliding the first end member 3 and the second end member 4.
- the seal member 5D is deformed and the separation membrane element 2 and the inner peripheral surface 7a of the pressure vessel 7 are The gap is sealed.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
図1に、本発明の第1実施形態に係る分離膜モジュール1Aを示す。この分離膜モジュール1Aは、ベッセルと呼ばれる筒状の圧力容器7と、圧力容器7内に挿入された複数本の分離膜エレメント2とを備えている。
分離膜エレメント2は、圧力容器7内に、前記実施形態とは逆に第1端部材3が下流側に位置し、第2端部材4が上流側に位置する向きで挿入されていてもよい。この場合には、図4Bに示すように、個々の分離膜エレメント2の外装材28の外面にその分離膜エレメント2を通過する前の原水の圧力を作用させる上流加圧型の分離膜モジュールを実現することができる。なお、その場合には、図4Bに示すように、最下流側に位置する分離膜エレメント2の第1端部材3に従来と同じパッキン15を装着すればよい。
次に、図6Aおよび6Bを参照して、本発明の第2実施形態に係る分離膜モジュール1Cを説明する。なお、本実施形態では、上述した構成と同一部分には同一符号を付して、その説明を省略する。この点は、後述する実施形態でも同様である。
第2端部材4に設けられる押圧部40は、第1実施形態の変形例と同様に、図7Aおよび7Bに示す変形例の分離膜モジュール1Dのように、第2端部材4に支持された別部材で構成されていてもよい。なお、第1実施形態で説明したその他の変形例が第2実施形態に適用可能であることは言うまでもない。
次に、図8Aおよび8Bを参照して、本発明の第3実施形態に係る分離膜モジュール1Eを説明する。
なお、シール部材5Cの橋架部53は、図8Aおよび8Bに示すように必ずしも円弧状の断面形状を有している必要はなく、例えば図10に示すようにV字状の断面形状を有していてもよい。
次に、図11Aおよび11Bを参照して、本発明の第4実施形態に係る分離膜モジュール1Fを説明する。
なお、分離膜エレメント2が圧力容器7内に、第1端部材3が下流側に位置し、第2端部材4が上流側に位置する向きで挿入される場合には、拡径部54が橋架部53との間に下流側に向かって開く開口を形成し、貫通孔53aがその反対側に位置するようになる。この場合には、図4Aに示すような下流加圧型の分離膜モジュールを実現することができる。
2 分離膜エレメント
20 流路
21 中心管
22 分離膜
3 第1端部材
4 第2端部材
40 押圧部
40a 貫通孔
5A~5D シール部材
51 第1リング部
52 第2リング部
53 橋架部
53a 貫通孔
54 拡径部
7 圧力容器
7a 内周面
Claims (10)
- 筒状の圧力容器と、
分離膜ならびにこの分離膜を挟んで配置された第1端部材および第2端部材を有し、前記圧力容器内に前記第1端部材と前記第2端部材とが当該圧力容器の軸方向に交互に並ぶように挿入された複数本の分離膜エレメントと、
隣り合う前記第1端部材および前記第2端部材の一方または双方に装着された、通常時は、装着された前記第1端部材および/または前記第2端部材の最大径よりも内側に収まる環状のシール部材と、を備え、
前記シール部材は、隣り合う分離膜エレメント同士の当接または前記圧力容器内への加圧流体の供給によって変形して前記圧力容器の内周面に密着する、分離膜モジュール。 - 前記シール部材は、前記第1端部材のうちで前記第2端部材と隣接する前記第1端部材に装着されており、
前記第2端部材のうちで前記第1端部材と隣接する第2端部材には、隣り合う前記分離膜エレメント同士が当接したときに前記シール部材を押圧することにより前記シール部材を変形させて前記圧力容器の内周面に押し付ける押圧部が設けられている、請求項1に記載の分離膜モジュール。 - 前記押圧部は、前記第2端部材に一体的に成形された突出部で構成されている、請求項2に記載の分離膜モジュール。
- 前記押圧部は、前記第2端部材に支持された別部材で構成されている、請求項2に記載の分離膜モジュール。
- 前記第1端部材と前記第2端部材との間には、前記分離膜エレメント内を通過した原水を前記分離膜エレメントの周囲に導くための流路が形成されており、
前記押圧部には、前記分離膜エレメントと前記圧力容器の内周面との間の空間を前記流路と連通する連通路が設けられている、請求項2~4のいずれか一項に記載の分離膜モジュール。 - 前記シール部材は、隣り合う前記第1端部材および前記第2端部材にこれらに跨って装着されており、隣り合う前記分離膜エレメント同士が当接したときに前記第1端部材および前記第2端部材によって径方向外側に張り出すように押しつぶされて前記圧力容器の内周面に押し付けられるように構成されている、請求項1に記載の分離膜モジュール。
- 前記シール部材は、前記第1端部材に保持される第1リング部と、前記第2端部材に保持される第2リング部と、前記第1リング部と前記第2リング部とを径方向外側に膨らみながら橋架する橋架部とを有している、請求項6に記載の分離膜モジュール。
- 前記第1端部材と前記第2端部材との間には、前記分離膜エレメント内を通過した原水を前記分離膜エレメントの周囲に導くための流路が形成されており、
前記シール部材の前記橋架部には、前記分離膜エレメントと前記圧力容器の内周面との間の空間を前記流路と連通する貫通孔が設けられている、請求項7に記載の分離膜モジュール。 - 前記シール部材は、隣り合う前記第1端部材および前記第2端部材にこれらに跨って装着されており、前記圧力容器の軸方向の一方からかかる圧力が前記圧力容器の軸方向の他方からかかる圧力より大きくなったときに径方向外側に張り出すように変形して前記圧力容器の内周面に押し付けられるように構成されており、
前記第1端部材と前記第2端部材との間には、前記分離膜エレメント内を通過した原水を前記分離膜エレメントの周囲に導くための流路が形成されており、
前記シール部材には、前記分離膜エレメントと前記圧力容器の内周面との間の空間を前記流路と連通する貫通孔が設けられている、請求項1に記載の分離膜モジュール。 - 前記シール部材は、前記第1端部材に保持される第1リング部と、前記第2端部材に保持される第2リング部と、前記第1リング部と前記第2リング部とを橋架する橋架部と、前記橋架部の外周面に設けられた、拡径しながら前記圧力容器の軸方向の一方に延びる拡径部とを有しており、
前記貫通孔は、前記橋架部における前記拡径部がつながる位置から前記圧力容器の軸方向の他方側に位置する部分に形成されている、請求項9に記載の分離膜モジュール。
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US13/877,030 US9061247B2 (en) | 2010-10-04 | 2011-09-13 | Separation membrane module |
CN201180048560.9A CN103153443B (zh) | 2010-10-04 | 2011-09-13 | 分离膜组件 |
KR1020137011492A KR101421911B1 (ko) | 2010-10-04 | 2011-09-13 | 분리막 모듈 |
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EP2821123A4 (en) * | 2012-02-29 | 2015-11-04 | Toray Industries | SEPARATION MEMBRANE MODULE AND METHOD FOR REPLACING A SEPARATION MEMBRANE ELEMENT |
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CN104936669A (zh) * | 2013-02-01 | 2015-09-23 | 陶氏环球技术有限责任公司 | 包含具有形成公共环形凹槽的端盖的邻接过滤元件的过滤组合件 |
US9579606B2 (en) * | 2014-07-23 | 2017-02-28 | Air Liquide Advanced Technologies U.S. Llc | Gas separation membrane module with improved gas seal |
CN105771656B (zh) * | 2016-04-29 | 2019-03-12 | 艾欧史密斯(中国)热水器有限公司 | 反渗透膜组件及其制备方法 |
WO2020120216A1 (en) * | 2018-12-14 | 2020-06-18 | Unilever N.V. | Membrane element and process for making the same |
CN110508149B (zh) * | 2019-09-20 | 2023-12-05 | 珠海格力电器股份有限公司 | 反渗透膜滤芯、净水机及平衡压力的方法 |
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KR20130101537A (ko) | 2013-09-13 |
US20130186819A1 (en) | 2013-07-25 |
US9061247B2 (en) | 2015-06-23 |
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