JP2009220070A - Spiral membrane element and spiral membrane module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spiral membrane element which enables an efficient discharge of an insoluble element contained in a supply liquid as a concentrated liquid while suppressing a decrease in effective membrane area, and to provide a spiral membrane module. <P>SOLUTION: The spiral membrane element 1 comprises a wound body R formed by winding a singular or a plurality of transmission side flow passage materials 3, supply side flow passage materials 6, and separating membranes 2 around a perforated central tube 5, and further includes an upstream side end member 10 provided at the upstream side of the wound body R for guiding the insoluble element contained in the supply liquid 7 to the outer periphery side. The supply side flow passage material 6 is provided with a part larger in thickness than the inner periphery side at the outer periphery side. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a spiral-type membrane element and a spiral-type membrane module that separates components suspended and dissolved in a liquid, and is particularly effective as a technique for reducing adverse effects caused by insoluble components contained in a supply liquid.

  As a structure of a conventional spiral membrane element (hereinafter also simply referred to as “membrane element”), one or more of a separation membrane, a supply-side channel material, and a permeation-side channel material are separated into a separation membrane and a supply-side channel material. In addition, one or a plurality of permeation-side flow path members is known that includes a wound body wound around a perforated central tube (see, for example, Patent Document 1).

  FIG. 7 is a partially cutaway perspective view of a conventional membrane element. The membrane element 1 shown in this figure has a structure in which a separation membrane unit including a separation membrane 2, a supply-side channel material 6 and a permeation-side channel material 3 is wound around a central tube 5. More specifically, an envelope-like membrane (bag-like membrane) is formed by overlaying the separation membrane 2 on both sides of the permeate-side flow path material 3 and adhering three sides, and the opening of the envelope-like membrane is centered. It is configured by being attached to the tube 5 and spirally wound around the outer peripheral surface of the central tube 5 together with the net-like (net-like) supply-side channel material 6. An upstream end member 10 such as a seal carrier is provided on the upstream side of the wound body R, and a downstream end member 20 such as a telescope prevention member is provided on the downstream side.

  When the membrane element 1 is used, the supply liquid 7 is supplied from one end face side of the membrane element 1. The supplied supply liquid 7 flows along the supply-side flow path member 6 in a direction parallel to the axial direction of the central tube 5, and is discharged as a concentrated liquid 9 from the other end face side of the membrane element 1. Further, the permeated liquid 8 that has permeated through the separation membrane 2 in the process in which the supply liquid 7 flows along the supply-side flow path material 6 is centered from the opening 5a along the permeation-side flow path material 3 as shown by the broken line arrows in the figure. It flows into the inside of the pipe 5 and is discharged from the end of the central pipe 5.

  In the conventional membrane element 1, the thickness of the supply-side channel material 6 is very thin because the thickness of the supply-side channel material 6 is constant and the effective membrane area per element volume needs to be increased. (For example, about 0.7 mm).

  On the other hand, since the separation performance of the membrane element 1 such as the RO membrane is reduced due to clogging, the supply liquid is pretreated using a separation membrane (MF membrane, UF membrane, etc.) for separating larger particles. Has been implemented.

JP 10-137558 A

  However, insoluble components such as fine particles and colloidal substances that could not be separated even after pretreatment with a separation membrane, elution substances from pipes on the way, and bacteria grown inside are not supplied to the membrane element supply liquid. It is often included in. Such an insoluble component is less likely to be discharged as a concentrated liquid when the supply-side channel material is thin as described above, and the separation performance is likely to deteriorate due to clogging. On the other hand, when the thickness of the supply-side channel material is increased, there is a problem that the effective membrane area per element volume is reduced and the separation performance is lowered.

  Accordingly, an object of the present invention is to provide a spiral membrane element and a spiral membrane module capable of efficiently discharging an insoluble component contained in a supply liquid as a concentrate while suppressing a decrease in effective membrane area. is there.

The above object can be achieved by the present invention as described below.
That is, the spiral membrane element of the present invention includes a spiral membrane element in which one or more of a separation membrane, a supply-side channel material, and a permeate-side channel material are wound around a perforated central tube. In addition, the upstream side of the wound body has an upstream end member that guides insoluble components contained in the supply liquid to the outer peripheral side, and the supply-side flow path member has a thickness larger than that of the inner peripheral side. Is provided on the outer peripheral side. In addition, the thickness of the supply side channel material refers to the thickness of the bulky part. For example, when the supply-side channel material is a net-like sheet composed of warp and weft, the thickness of the permeate-side channel material refers to the thickness of the intersection of the warp and weft.

  According to the spiral membrane element of the present invention, an insoluble component in the supply liquid can be guided to the outer peripheral side by the upstream end member, and the supply side flow path member has a thickened portion on the outer peripheral side. Insoluble components contained in the liquid are easily discharged as a concentrated liquid. At that time, since the thickness of the supply-side channel material is only partially increased, a reduction in the effective membrane area can be sufficiently suppressed. As a result, it is possible to provide a spiral membrane element capable of efficiently discharging insoluble components contained in the supply liquid as a concentrate while suppressing a decrease in effective membrane area.

  In the above, the supply-side flow path material is a net having warps arranged along the axial direction and wefts intersecting the warps, and the thickness of the warp arranged on the outer peripheral side of the warps It is preferable to make it thick. By using such a net, it is possible to provide a portion having a larger thickness on the outer peripheral side of the supply-side flow path member simply by increasing the thickness of the warp arranged on the outer peripheral side. And the clearance gap of a supply side flow path spreads by the part which thickened the thickness of the warp, and it becomes easy to discharge | emit the insoluble component contained in a supply liquid as a concentrate.

  Moreover, it is preferable that the supply side flow path member is provided with a portion where the thickness gradually increases from the inner peripheral side to the outer peripheral side. As a result, the thickness of the supply-side channel material is unlikely to change rapidly, and damage to the separation membrane due to stress concentration is unlikely to occur, and durability can be improved.

  The upstream end member preferably has a blade portion that generates a swirling flow around the axis. Since the swirling flow is generated by the blade portion of the upstream side end member, the insoluble component can be efficiently guided to the outer peripheral side by the centrifugal force at that time.

  On the other hand, the spiral membrane module of the present invention comprises a spiral membrane element comprising a wound body in which one or more of a separation membrane, a supply-side channel material and a permeate-side channel material are wound around a perforated central tube. However, in the spiral membrane module housed in the pressure vessel, on the upstream side of the spiral membrane element, there is a flow regulating member that guides insoluble components contained in the supply liquid to the outer peripheral side, and the supply side The channel material is characterized in that a portion having a thickness larger than that on the inner peripheral side is provided on the outer peripheral side.

  According to the spiral membrane module of the present invention, an insoluble component in the supply liquid can be guided to the outer peripheral side by the flow regulating member, and the supply liquid is provided on the outer peripheral side of the supply-side channel material. The insoluble component contained in is easily discharged as a concentrate. At that time, since the thickness of the supply-side channel material is only partially increased, a reduction in the effective membrane area can be sufficiently suppressed. As a result, it is possible to provide a spiral membrane module capable of efficiently discharging insoluble components contained in the supply liquid as a concentrated liquid while suppressing a decrease in effective membrane area.

  In the above, it is preferable that the flow restricting member has a blade portion that generates a swirling flow around the axis of the spiral membrane element. Since the swirling flow is generated by the blade portion of such a flow regulating member, the insoluble component can be efficiently guided to the outer peripheral side by the centrifugal force at that time.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

(Spiral type membrane element)
FIG. 1 is a perspective view showing an example of a spiral membrane element of the present invention. 2A and 2B are diagrams showing an example of an upstream end member used in the present invention, in which FIG. 2A is a partially broken perspective view, FIG. 2B is a front view, FIG. 2C is a top view, and FIG. (A) is a development view showing from A arrow to B arrow view in (b), (e) is a development view showing from A "arrow view to B" arrow view in (b). 2 (d) and 2 (e) indicate the broken surfaces of the blades in the developed view. 3A and 3B are views showing a state before winding of an example of the supply-side channel material used in the present invention, in which FIG. 3A is a plan view shown with a central tube, and FIG. 3B is a front view thereof.

  In the spiral membrane element of the present invention, as shown in FIG. 1, one or more of the separation membrane 2, the supply-side channel material 6, and the permeation-side channel material 3 are wound around a perforated central tube 5. A wound body R is provided. In the present embodiment, an example in which a plurality of separation membrane units including the separation membrane 2, the supply-side flow path material 6, and the permeation-side flow path material 3 is wound around the central tube 5 is shown. The membrane unit may be wound around the central tube.

  The spiral membrane element of the present invention includes a sealing portion for preventing mixing of the supply side channel and the permeation side channel. For example, when forming an envelope-like membrane (bag-like membrane) by overlapping the separation membrane 2 on both sides of the permeate-side flow path material 3 and bonding the three sides, the sealing portion 21 on the outer peripheral side edge and the upstream side Sealing portions are formed on the end side and the downstream end side. Moreover, it is preferable to provide a sealing part also between the inner peripheral side edge part of the upstream side edge and the downstream side edge and the central tube 5.

  The envelope film is attached to the central tube 5 and wound around the outer peripheral surface of the central tube 5 together with the net-like (net-like) supply-side flow path member 6 to form a wound body R. Is done. An upstream end member 10 such as a seal carrier is provided on the upstream side of the wound body R, and a downstream end member 20 such as a telescope prevention member is provided on the downstream side as necessary.

  When the membrane element 1 is used, the supply liquid 7 is supplied from one end face side of the membrane element 1. The supplied supply liquid 7 flows along the supply-side flow path member 6 in a direction parallel to the axial direction of the central tube 5, and is discharged as a concentrated liquid 9 from the other end face side of the membrane element 1. Further, the permeated liquid 8 that has permeated the separation membrane 2 in the course of the supply liquid 7 flowing along the supply-side flow path material 6 passes through the aperture 5a along the permeation-side flow path material 3 as shown by the broken line arrows in the figure. It flows into the center tube 5 and is discharged from the end of the center tube 5.

  In this invention, as shown in FIGS. 1-2, the upstream end member 10 which guides the insoluble component contained in the supply liquid 7 to the outer peripheral side is provided in the upstream of the wound body R, It is characterized by the above-mentioned. And In this invention, it is preferable that the upstream end member 10 has the blade | wing part 11 which produces a swirl flow around the axial center A1. In FIG. 1, for simplification, the one having four blade portions 11 is described, but the one having eight blade portions 11 as shown in FIG. 2 will be described in detail.

  As shown in FIG. 2, the upstream end member 10 of the present embodiment includes an outer annular portion 12, an inner annular portion 13, and a blade portion 11 that connects them. In the present embodiment, an example is shown in which the upstream end member 10 has a function as a seal carrier. Therefore, the outer annular portion 12 includes a groove portion 12a for holding a sealing material having an O-ring or a U-shaped cross section.

  The shape of the blade portion 11 may be any as long as it can generate a swirling flow around the axis A1, but the number of blades is 3 to 40 from the viewpoint of effectively generating a swirling flow in a limited space. Preferably, 6 to 16 is more preferable.

  As shown in FIGS. 2D to 2E, the blade portion 11 has a larger blade inclination angle toward the inner peripheral side.

  In addition, as shown in FIG. 2B, the blade portion 11 is designed so that there is no overlap or gap between the blades when viewed from the front. In order to effectively generate a swirl flow, it is preferable that there is no gap between the blades in the front view, but in the front view, the occupied area of each blade is preferably 80% or more. Further, in order to generate a larger swirling flow, it is preferable that the blades overlap in a front view. In that case, it is preferable that the overlapping area of adjacent blades is 1 to 50% of the area of one blade in a front view.

  The inner annular portion 13 has an opening 13 a for inserting the central tube 5, and the upstream end member 10 is held by the central tube 5 through the inner annular portion 13. Since the supply liquid 7 flowing between the inner annular portion 13 and the outer annular portion 12 flows along the blade portion 11, a swirling flow (arrow in FIG. 2A) is generated around the axis A1. be able to.

  On the other hand, as shown in FIG. 3, the spiral membrane element of the present invention is characterized in that the supply-side channel material 6 includes a portion on the outer peripheral side A <b> 3 whose thickness is larger than that of the inner peripheral side A <b> 2. In the present embodiment, as shown in FIG. 3, the supply-side flow path member 6 is constituted by a net having warps 6a arranged along the axial direction A1 and wefts 6b intersecting the warps 6a, and the warps 6a The example which made the thickness of the warp 6a arrange | positioned among the outer periphery side A3 thick is shown.

  In this invention, it is preferable that a big level difference does not arise between the part which enlarged the thickness of the supply side flow-path material 6, and the part which is not so. For this reason, it is preferable to provide a portion where the thickness gradually increases from the inner peripheral side A2 to the outer peripheral side A3. In the present embodiment, by gradually increasing the thickness of the warp thread 6a in the order of the regions R1, R2, R3, and R4, the thickness t1 to t4 of the supply-side flow path member 6 is increased in stages. The step is kept small.

  The thickness t4 of the supply-side flow path member 6 in the region R4 on the outermost peripheral side A3 is 0.9 from the viewpoint of effectively discharging insoluble components as the concentrate 9 while suppressing a decrease in the effective membrane area per element volume. -2.5 mm is preferable and 1.2-2.0 mm is more preferable. Further, from the same viewpoint, the diameter of the warp 6a in the region R4 on the outermost peripheral side A3 is preferably 0.6 to 2.0 mm, and more preferably 0.8 to 1.5 mm.

  The weft yarn 6b may be perpendicular or inclined with respect to the warp yarn 6a, and the weft yarn 6b may have two or more inclination directions. However, from the viewpoint of effectively discharging insoluble components as the concentrated liquid 9, the weft thread 6b is preferably inclined at 30 to 60 ° with respect to the warp thread 6a, and is inclined at 40 to 60 °. Is more preferable. Although the diameter of the weft 6b is not specifically limited, For example, it is about 0.2-0.5 mm.

  The separation membrane 2 is arranged on both surfaces of the supply-side flow path material 6 so that the surfaces having the separation active layer face each other. In this way, the warps are stepwise in the order of the regions R1, R2, R3, and R4. By increasing the thickness of 6a, the gap between the separation membranes 2 increases toward the outer peripheral side A3, and the insoluble component contained in the supply liquid 7 is easily discharged as the concentrated liquid 9 on the outer peripheral side A3. That is, if the insoluble component has a large particle size from the beginning, or the particle size becomes large due to aggregation, and the gap between the separation membranes 2 is small, it is difficult to be discharged as the concentrate 9.

  As a manufacturing method of the net-like supply-side flow path member 6, it can be manufactured by, for example, a fusion method or a shearing method. When the net is formed by the fusion method, generally, the weft and warp yarns are extruded while rotating a number of nozzle holes arranged on the inner and outer circumferences of the extruder die in the opposite direction, and then the intersection. Then, they are fused with each other, immersed in a cooling bath, and then taken out. When performing the above extrusion, arrange the nozzle holes so that the nozzle holes do not overlap at the intersection of the weft and the warp (this is different from the shearing method), It is fused at the timing when proper fusion occurs.

  In particular, when a net as shown in FIG. 3 is formed by the fusion method, the nozzle diameter of the warp is increased at the position corresponding to the outer peripheral side A3, and the nozzle hole of the weft is not rotated without rotating the nozzle hole of the warp. A method of rotating only is effective.

  Although any material can be used as the supply-side channel material 6, in consideration of the corrosion resistance, heat resistance, mechanical strength and the like as described above, for example, polyolefin such as polypropylene and polyethylene is preferable.

  Although it is possible to use the permeation side flow path material 3 having a constant thickness as in the conventional case for the supply side flow path material 6 as described above, in the present invention, as shown in FIG. It is preferable to use the permeate-side channel material 3 whose thickness gradually increases from A3 to the inner peripheral side A2. As a result, the change in the thickness of the separation membrane unit to be wound can be reduced, and the thickness of the permeate channel can be gradually increased from the outer peripheral side to the inner peripheral side. An increase in channel resistance can be suppressed. An increase in flow path resistance on the inner peripheral side of the permeate side flow path material 3 can be suppressed.

  In recent years, with the increase in the size of membrane processing plants, membrane elements tend to have a larger diameter (for example, 16 inches) instead of the conventional 8 inch (about 200 mm) diameter membrane element. Since an increase in flow resistance on the inner peripheral side of the material 3 is likely to be a problem, it is particularly effective to use the permeate-side flow path material 3 whose thickness gradually increases from the outer peripheral side A3 to the inner peripheral side A2. .

  FIG. 4 shows an example of the permeation side flow path material 3 used in the present invention, and shows a state where the permeation side flow path material 3 is attached to the central tube 5 together with the separation membrane 1. In this example, the permeation-side flow path material 3 is sandwiched between the upper and lower separation membranes 1 and the three sides are sealed (the sealing portion 21 indicates the sealing portion at the outer peripheral side end). From A3 to the inner peripheral side A2, the thickness of the permeate-side channel material is increased from 1 to 3 sheets. The thickness of the permeate channel material can also be changed by changing the diameter of the constituent yarn.

  The center tube 12 only needs to have an opening 12a around the tube, and any conventional tube can be used. For the permeate side channel member 13, a net-like sheet, a mesh-like sheet, a grooved sheet, a corrugated sheet, or the like can be used. As the separation membrane 14, a reverse osmosis membrane, a nanofiltration membrane, an ultrafiltration membrane, or the like can be used.

  In the example shown in FIG. 4, the separation membrane 2 is folded in half on the central tube 5 side, and the supply-side flow path material 6 is sandwiched therebetween, and this is wound around the central tube 5. The number of separation membrane units U to be wound (number of leaves) is preferably 25 to 80.

  In the spiral membrane element of the present invention, the wound body R after resin sealing may be trimmed at both ends in order to adjust the length in the axial direction. Further, a perforated end member for preventing deformation (such as a telescope), a sealing material, a reinforcing material, an exterior material, and the like can be provided as necessary.

(Another embodiment of spiral membrane element)
In the above, another embodiment of the present invention is described.

  (1) In the above-described embodiment, an example in which the upstream end member 10 has a relatively flat blade portion 11 as shown in FIG. 2 is used. In the present invention, as shown in FIG. Thus, you may use the upstream end member 10 which has the blade | wing part 11 provided with the edge part 11a which regulates a flow direction in a wound body side (downstream side). Thus, when the blade | wing part 11 is equipped with the edge part 11a, an end surface becomes perpendicular | vertical to an axial center direction, the effect which suppresses a telescope by supporting the end surface of the wound body R is acquired.

  5 is a view showing another example of the upstream end member used in the present invention, (a) is a rear view corresponding to a front view from the wound body side, (b) is a front view, (c) is a top view, (d) is a development view showing from A arrow to B arrow in (b), and (e) is a development view showing from A "arrow to B" arrow in (b). is there.

  (2) In the above-described embodiment, the example using the upstream side end member having the blade portion that generates the swirling flow around the axis is shown. However, in the present invention, a plurality of slits that generate the swirling flow around the axis. You may use the upstream end member which has these. As such a slit, the slit opening direction is formed by laminating a plurality of disks provided with slits formed by inclining the forming direction of the slit itself in the turning direction, and by slightly shifting each slit. And the like shifted in the turning direction.

  In addition, examples of a method for inducing the insoluble component contained in the supply liquid to the outer peripheral side include a method using a difference in sedimentation speed.

  (3) In the above-described embodiment, an example is shown in which the net-like supply-side channel material is provided on the outer peripheral side with a portion that is thicker than the inner peripheral side by changing the thickness of the warp. Then, it is also possible to obtain a supply-side flow path material having a portion whose thickness is larger on the outer peripheral side than on the inner peripheral side by partially changing the number of nets stacked. In that case, for example, it is possible to increase the thickness of the outer peripheral side by folding back the outer peripheral side of the net-like supply side flow path material having a constant thickness and stacking two sheets.

(Spiral type membrane module)
In the spiral membrane module of the present invention, as shown in FIG. 6, one or more of the separation membrane 2, the supply-side channel material 6, and the permeation-side channel material 3 are wound around a perforated central tube 5. The spiral membrane element 1 including the wound body R has a structure accommodated in the pressure vessel 30. The supply-side channel material 6 of the spiral membrane element 1 is provided with a portion whose thickness is larger on the outer circumferential side than the inner circumferential side, and the same configuration as that of the spiral membrane element 1 of the present invention described above can be applied.

  The difference is that the above-described spiral membrane element 1 of the present invention is provided with an upstream end member 10 on the upstream side of the wound body R to guide the insoluble component contained in the supply liquid 7 to the outer peripheral side. On the other hand, the spiral membrane module of the present invention has a flow regulating member 16 that guides insoluble components contained in the supplied liquid to the outer peripheral side on the upstream side of the spiral membrane element 1. In the spiral membrane module of the present invention, an upstream end member 10 for guiding insoluble components contained in the supply liquid 7 to the outer peripheral side is provided on the upstream side of the wound body R as the spiral membrane element 1. It is also possible to use things.

  In the present embodiment, an example is shown in which the flow regulating member 16 having a blade portion 16a that generates a swirling flow around the axis A1 of the spiral membrane element is used. In the drawing, the pressure vessel 30 is indicated by an imaginary line, but the outer diameter of the blade portion 16a of the flow regulating member 16 is 60 to 90 of the inner diameter of the pressure vessel 30 from the viewpoint of effectively generating a swirling flow. % Is preferable, and 70 to 85% is more preferable.

  The shape of the blade portion 16a may be any shape as long as it can generate a swirling flow around the axis A1, but the number of blades is 3 to 40 from the viewpoint of effectively generating a swirling flow in a limited space. Preferably, 6 to 16 is more preferable.

  Like the blade portion 11 of the upstream side end member 10, the blade portion 16a preferably has no gap between the blades in the front view, but the area occupied by each blade in the front view is 80%. The above is preferable. Further, in order to generate a larger swirling flow, it is preferable that the blades overlap in a front view. In that case, it is preferable that the overlapping area of adjacent blades is 1 to 50% of the area of one blade in a front view.

  The inner annular portion 16b preferably has an opening for inserting the central tube 5 and holds the flow regulating member 16 in the central tube 5 through the inner annular portion 16b. Since the supply liquid 7 flows along the blade portion 16a by the flow regulating member 16, a swirling flow can be generated around the axis A1.

  In the present invention, instead of the flow restriction member 16 having the blade portions 16a, the flow restriction member 16 having a plurality of slits that generate a swirling flow around the axis may be used. As such a slit, the slit opening direction is formed by laminating a plurality of disks provided with slits formed by inclining the forming direction of the slit itself in the turning direction, and by slightly shifting each slit. And the like shifted in the turning direction.

  In addition, examples of a method for inducing the insoluble component contained in the supply liquid to the outer peripheral side include a method using a difference in sedimentation speed.

The perspective view which shows an example of the spiral type membrane element of this invention It is a figure which shows an example of the upstream end member used for this invention, (a) is the perspective view which fractured | ruptured one part, (b) is a front view, (c) is a top view, (d) is (b). The development view which shows from A arrow view in B to B arrow view, (e) is the development view which shows from A "arrow view to B" arrow view in (b) It is a figure which shows the state before winding of an example of the supply side flow path material used for this invention, (a) is the top view shown with the center pipe, (b) The front view The schematic block diagram which shows an example of the permeation | transmission side channel material used for this invention It is a figure which shows the other example of the upstream end member used for this invention, (a) is a rear view equivalent to the front view from a wound body side, (b) is a front view, (c) is a top view, (D) is a development view showing from arrow A to B in (b), and (e) is a development view showing from A “arrow to B” in (b). The perspective view which shows an example of the spiral membrane module of this invention FIG. 1 is a perspective view showing an example of a conventional spiral membrane element 1 Spiral membrane element 2 Separation membrane 3 Permeation side channel material 5 Center tube 5a Open hole 6 Supply side channel material 6a Warp yarn 6b Weft yarn 7 Supply liquid 10 Upstream end member 11 Blade 16 Flow restricting member 16a Blade R Rolled body A1 Axial direction A2 Inner circumference A3 Outer circumference

Claims (6)

In the spiral membrane element including a wound body in which one or more of the separation membrane, the supply-side channel material and the permeation-side channel material are wound around a perforated central tube,
The upstream side of the wound body has an upstream end member that guides insoluble components contained in the supply liquid to the outer peripheral side, and the supply-side flow path member has an outer peripheral portion that is thicker than the inner peripheral side. A spiral membrane element characterized by being provided on the side.   The supply-side channel material is a net having warp yarns arranged along the axial direction and weft yarns intersecting the warp yarns, and the warp yarns arranged on the outer peripheral side of the warp yarns are thickened. The spiral membrane element according to claim 1.   3. The spiral membrane element according to claim 1, wherein the supply-side channel material is provided with a portion where the thickness gradually increases from the inner peripheral side to the outer peripheral side.   The spiral type membrane element according to any one of claims 1 to 3, wherein the upstream end member has a blade portion that generates a swirling flow around an axis. A spiral type membrane element having a wound body in which one or more of a separation membrane, a supply side channel material and a permeate side channel material are wound around a perforated central tube is housed in a pressure vessel In the membrane module,
On the upstream side of the spiral membrane element, there is a flow restricting member that guides insoluble components contained in the supply liquid to the outer peripheral side, and the supply-side channel material has a portion whose thickness is larger than that of the inner peripheral side. A spiral membrane module provided on the outer peripheral side.   The spiral type membrane module according to claim 5, wherein the flow regulating member has a blade portion that generates a swirling flow around an axis of the spiral type membrane element.

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