JP4629884B2 - Hollow fiber membrane module - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hollow fiber membrane module, and more particularly, to a hollow fiber membrane module that has improved productivity and pressure resistance and is suitable for filtration of highly pollutant liquids using organic contaminants.
[0002]
[Prior art]
Conventionally, hollow fiber membrane modules have been used in many ways for producing aseptic water, drinking water, highly pure water, purifying air, and the like. In addition to these applications, in recent years, highly polluted water such as secondary and tertiary treatment in sewage treatment plants, solid-liquid separation in septic tanks, solid-liquid separation of SS (suspended material) in industrial wastewater, etc. It has come to be used for processing applications.
[0003]
As hollow fiber membrane modules suitably used for such high-contamination water treatment applications, they are disclosed in JP-A-5-261253, JP-A-6-342, JP-A-6-340, and the like. A hollow fiber membrane module in which an end of a sheet-like hollow fiber membrane bundle is housed in a rectangular housing having a hollow portion (water collecting portion) inside and fixed using a fixing resin. Can be mentioned. These hollow fiber membrane modules are made by injecting a fixing resin into the housing, fixing the end of the hollow fiber membrane bundle to the housing with the fixing resin, and then fixing the resin so that the end of the hollow fiber membrane opens. It is manufactured by cutting a part of.
[0004]
However, in such a manufacturing method, it is necessary to use a housing having a large diameter in order to insert the cutter into the housing. Therefore, when a hollow fiber membrane module unit is assembled by arranging and integrating a plurality of these hollow fiber membrane modules, the installation space for one hollow fiber membrane module increases, and the hollow fibers per unit volume in the hollow fiber membrane module unit There was a problem that the integration rate of the membrane module was lowered. Further, depending on the use of the hollow fiber membrane module, the fixing strength of the hollow fiber membrane may be insufficient. Furthermore, it was necessary to prepare a separate jig in order to stably hold the hollow fiber membrane during resin injection.
[0005]
As a solution to this problem, there is a hollow fiber membrane module described in JP-A-10-57775. In this hollow fiber membrane module, a slit is formed in a pipe-shaped housing body, a resin potting weir is provided around the slit, and a hollow fiber membrane bundle in which an end of the hollow fiber membrane is opened in advance is provided in the slit portion. It is manufactured by inserting and injecting a fixing resin inside the resin potting weir so as not to block the end of the hollow fiber membrane, and fixing the hollow fiber membrane bundle with the fixing resin.
[0006]
This hollow fiber membrane module eliminates the step of cutting a part of the fixing resin so that the end of the hollow fiber membrane is opened after the hollow fiber membrane bundle is fixed to the housing with the fixing resin in the manufacturing process. As a result, the diameter of the housing can be reduced.
[0007]
Japanese Patent Laid-Open No. 2000-84373 proposes a hollow fiber membrane module obtained by improving the hollow fiber membrane module disclosed in Japanese Patent Laid-Open No. 10-57775. FIG. 10 is a perspective view of the hollow fiber membrane module, and FIG. 11 is a cross-sectional view of a housing portion in the hollow fiber membrane module of FIG.
This hollow fiber membrane module 31 includes a pair of housings 32, a hollow fiber membrane bundle 4 in which a plurality of hollow fiber membranes 3 are bundled in a sheet shape, and an end having a treated water outlet 36 joined to one end of the housing 32. A cap 37 and an end cap 38 that is joined to the other end of the housing 32 and has no treated water outlet are schematically configured. The hollow fiber membrane bundle 4 is fixed to the housing 32 by the fixing resin 5 while being inserted into the housing 32 and maintaining the open end portion 9 of the hollow fiber membrane 3.
[0008]
The housing 32 includes a hollow internal passage 11 formed therein, a slit 12 formed on a side surface of the housing 2, a housing main body 13 on both sides of the slit 12, and parallel to the slit 12. It is a tubular member having a U-shaped cross section that includes a weir 33 provided integrally and a resin injection portion 34 sandwiched between the weirs 33.
This hollow fiber membrane module 31 employs a U-shaped housing 32 to further reduce the diameter of the housing, increase the lamination rate, and improve the pressure resistance of the housing.
[0009]
[Problems to be solved by the invention]
However, the hollow fiber membrane module 31 has a variation in the dimensions of the weir 33 provided on the outer surface of the main body and the resin injection portion 34 sandwiched between them depending on the molding state. In some cases, it was shaped like this. Further, when the hollow fiber membrane bundle 4 was inserted into the housing 32 through the slit 12 and fixed by being sandwiched between the slits 12, the hollow fiber membrane bundle 4 was inserted into the slit 12 due to the accuracy of the gap of the slit 12 and the dimensions of the hollow fiber membrane bundle 4. In some cases, the hollow fiber membrane bundle 4 was inclined to the side.
[0010]
In such cases, the resin injecting portion 34 cannot have a sufficient capacity, or the capacity of the resin injecting portion 34 divided by the hollow fiber membrane bundle 4 varies between the left and right, and the fixing resin is injected. At this time, a phenomenon that the resin leaked out of the housing 32 occurred. Further, since a sufficient amount of resin is not used for potting due to leakage of the fixing resin, the fixing resin does not spread uniformly and sufficiently over the entire resin injection portion 34, and the hollow fiber membrane bundle 4 is not sufficiently fixed. In some cases, it was a defective product.
In addition, due to the lack of the amount of resin used for potting, there was a concern about the influence on the pressure resistance performance of the hollow fiber membrane module.
[0011]
Accordingly, an object of the present invention is to provide a hollow fiber membrane module in which the hollow fiber membrane is reliably fixed to the housing by a fixing resin and at the same time the pressure resistance is improved.
[0012]
[Means for Solving the Problems]
That is, in the hollow fiber membrane module of the present invention, a hollow fiber membrane bundle obtained by bundling a plurality of hollow fiber membranes in a sheet shape is fixed to a cylindrical housing with a fixing resin while maintaining an open state of the end portion of the hollow fiber membrane. A hollow fiber membrane module, wherein the housing is provided with a slit for inserting the end of the hollow fiber membrane bundle into the housing, on both sides of the slit, and parallel to the slit The dam has a dam body, and a dam body and a bent portion bent outward from the tip of the dam body.
[0013]
The height of the weir body is preferably 10 to 90% of the height of the entire weir.
The ratio between the distance between the tip of one weir and the tip of the other weir and the distance between the base end of one weir and the base end of the other weir is 10: 9 to 2: 1. It is desirable that
The cross-sectional shape perpendicular to the longitudinal direction of the housing is preferably substantially H-shaped.
Moreover, the thickness of the slit is preferably 0.1 to 20 mm.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing an example of the hollow fiber membrane module of the present invention, and FIG. 2 is a cross-sectional view of a housing portion in the hollow fiber membrane module of FIG.
This hollow fiber membrane module 1 includes a pair of housings 2, a hollow fiber membrane bundle 4 in which a plurality of hollow fiber membranes 3 are bundled in a sheet shape, and an end having a treated water outlet 6 joined to one end of the housing 2. It has a cap 7 and an end cap 8 joined to the other end of the housing 2 and having no treated water outlet. The hollow fiber membrane bundle 4 is fixed to the housing 2 by a fixing resin 5 while being inserted into the housing 2 and maintaining the open end portion 9 of the hollow fiber membrane 3.
[0015]
As shown in FIG. 3, the housing 2 includes a hollow internal passage 11 formed therein, a slit 12 formed on a side surface of the housing 2, both sides of the slit 12, and the slit 12. And a weir 14 provided integrally with the housing body 13 in parallel, and a resin member 15 sandwiched between the weirs 14 and a U-shaped cylindrical member. The weir 14 is substantially parallel to the hollow fiber membrane, and the base end 16 is connected to the housing body 13. The bend 14 is bent outward from the tip 18 of the weir body 17. 19.
[0016]
The bent portion 19 of the weir 14 is bent outward from the tip 18 of the weir body 17, so that the dimensional variation of the weir 14 caused by the molding accuracy of the housing 2 and the inward inclination of the weir 14 are reduced. This is for the purpose of suppressing and facilitating the injection of the fixing resin into the resin injection portion 15. The bent portion 19 serves as a rib to reduce deformation when the housing 2 is molded. Even if there is some variation in the amount of resin injected during potting, the bent portion 19 is fixed after potting. The variation of the thickness of the resin 5 for use is reduced.
[0017]
Here, as shown in FIG. 4, the bending angle α of the bending portion 19 is a point on the inner wall surface side of the tangent line 21 a at the tip 18 of the dam body 17 of the flow line 20 a of the dam body 17 and the tip 18 of the dam body 17. And an angle sandwiched by a line 21 b connecting the point on the inner wall surface of the tip 22 of the weir 14. Further, the flow line 20a of the weir body 17 at this time indicates a line along the inner wall surface of the weir body 17 as shown in the figure.
Therefore, when the bent portion 19 is curved convexly, the tangent line 21b and the bent angle α are set as shown in FIG. 5, and when the bent portion 19 itself is curved concavely, the tangent line is set. 21b and the bending angle α are set as shown in FIG.
[0018]
The bending angle α of the bent portion 19 is not particularly limited, but when the bent portion 19 is linear, it is usually set in a range of 0 <α ≦ 90 °, and when the bent portion 19 is curved, Usually, it is set in the range of 0 ≦ α ≦ 90 °. The bending angle of the bent portion 19 is preferably in the range of 10 ≦ α ≦ 45 °. When the bending angle is less than 10 °, the above-described effects of suppressing the variation in the dimensions of the weir 14 and the inward inclination of the weir 14 and facilitating the injection of the fixing resin into the resin injecting portion. If the bending angle exceeds 45 °, the original role of the weir for suppressing leakage of the fixing resin may be impaired.
[0019]
In forming the bent portion 19 in the weir 14, the outer end is bent from the base end portion 16 of the weir 17 from the viewpoint of maintaining the pressure resistance of the hollow fiber membrane module 1 and minimizing the amount of resin used during potting. Instead, it is preferable to bend outward from a position at a certain distance from the base end 16, that is, from the tip 18 of the dam body 17. In addition, the dam 14 should just bend the bending part 19 to the outer side, and the dam main body 17 may incline inside. That is, the weir body 17 may be substantially parallel to the hollow fiber membrane 3 or may be inclined inward as long as it is not inclined outward. However, from the viewpoint of securing the capacity of the resin injection portion 15 and maintaining the pressure resistance of the hollow fiber membrane module 1, the weir body 17 is preferably substantially parallel to the hollow fiber membrane 3.
[0020]
If the bent portion 19 is formed from the base end portion 16 of the weir 14, not only the thickness of the fixing resin 5 becomes thin, but also a negative pressure generated during suction filtration or a reverse liquid cleaning occurs. There is a possibility that the resin peels easily due to the pressure applied to the inside of the housing, such as positive pressure, and the pressure resistance is affected. In addition, since the width of the housing 2 becomes too wide, there is a problem in that when a plurality of hollow fiber membrane modules 1 are integrated into a unit, the number of integrated units is affected and the membrane area ratio per unit volume decreases. Occur.
[0021]
From such a point of view, the height A of the dam body 17 is such that the thickness of the fixing resin 5 can be secured and the pressure resistance of the hollow fiber membrane module 1 can be maintained, that is, the height B of the dam 14 as a whole. It is preferably set in the range of 10% to 90%. If the height A of the weir body 17 is less than 10% of the total height B of the weir 14, the pressure resistance of the hollow fiber membrane module 1 may be insufficient. If it exceeds 90%, the dimensions of the weir 14 There is a possibility that the effect of the bent portion 19 that suppresses variation and inward inclination of the weir 14 and facilitates injection of the fixing resin into the resin injection portion 15 may not be obtained. Here, the height A of the weir body 17 is the height from the base end portion 16 of the weir 14 to the tip 18 of the weir body 17, and the height B of the entire weir 14 is from the base end portion 16 of the weir 14. This is the height up to the tip 22.
[0022]
Further, the distance C between the distal end 22 of the one weir 14 and the distal end 22 of the other weir 14 and the distance D between the proximal end 16 of the one weir 14 and the proximal end 16 of the other weir 14 The ratio (C: D) is preferably 10: 9 to 2: 1. If this ratio is smaller than 10: 9, it may be difficult to inject the fixing resin. If this ratio is larger than 2: 1, the handleability of the hollow fiber membrane module 1 is deteriorated and necessary for fixing. Increases the amount of resin. Here, the interval C is the distance between the inner wall surfaces of the distal end portion 22 of the opposing weir 14, and the interval D is the distance between the inner wall surfaces of the proximal end portion 16 of the opposing weir 14.
[0023]
Since the thickness of the slit 12 also affects the potting quality, it is necessary to have a dimension that allows the hollow fiber membrane 3 to be firmly gripped at the minimum, and is preferably set in the range of 0.1 to 30 mm. Furthermore, in order to ensure the effective membrane area and maintain the pressure resistance performance, it is more preferable to set in the range of 0.1 to 20 mm.
[0024]
The cross-sectional shape of the internal passage 11 in the housing 2 is preferably substantially circular in order to uniformly disperse the pressure applied to the inside.
The size of the housing 2 is appropriately adjusted depending on the size of the hollow fiber membrane bundle 4 to be fixed and the use of the hollow fiber membrane module 1.
[0025]
The housing 2 may be made of any material having mechanical strength and durability. For example, polycarbonate, polysulfone, polyolefin (polyethylene, polypropylene, etc.), PVC (polyvinyl chloride), acrylic resin, ABS resin, Modified PPE (polyphenylene ether) or the like can be used. When the hollow fiber membrane module 1 using the housing 2 needs to be incinerated after use, it is desirable to use a hydrocarbon-based resin that can be completely burned without emitting a toxic gas.
[0026]
Various hollow fiber membranes 3 can be used. For example, cellulose, polyolefin (polyethylene, polypropylene, etc.), polyvinyl alcohol, PMMA (polymethyl methacrylate), polysulfone, fluorine (PTFE ( (E.g., polytetrafluoroethylene) and PVDF (polyvinylidene fluoride)) can be used. Among them, a material with high elongation such as polyethylene is preferable. In addition, if it is a hollow fiber which can be used as a filtration membrane, there will be no restriction | limiting in particular in a hole diameter, a porosity, a film thickness, an outer diameter, etc.
[0027]
The hollow fiber membrane bundle 4 may be one in which the hollow fiber membranes 3 are simply arranged, but a hollow fiber membrane 3 that is knitted using, for example, wefts, or a laminate in which several knitted fabrics are laminated. From the viewpoint of workability, it is preferably used. In addition, the lamination | stacking of the knitted fabric here also includes what was folded and piled up in suitable length, without cut | disconnecting a knitted fabric. The number of layers (folding) of the knitted fabric varies depending on the thickness of the knitted fabric, that is, the thickness of the hollow fiber membrane 3 and the number of combined yarns of the hollow fiber membrane 3 when the knitted fabric is knitted. Up to is preferable.
[0028]
As the fixing resin 5, an epoxy resin, an unsaturated polyester resin, a polyurethane resin, a silicone-based filler, various hot melt resins, and the like can be used.
The viscosity of the fixing resin before solidification is not particularly limited, but is preferably 500 to 10,000 mPa · s, and more preferably 1000 to 5000 mPa · s. If the viscosity of the fixing resin is less than 500 mPa · s, the fixing resin may flow to the opening end 9 of the hollow fiber membrane 3 and cause the opening end 9 to be blocked. When the viscosity of the fixing resin exceeds 10,000 mPa · s, it is difficult to impregnate the plurality of hollow fiber membranes 3.
[0029]
Next, the manufacturing method of the hollow fiber membrane module 1 is demonstrated.
First, the end of each hollow fiber membrane 3 constituting the hollow fiber membrane bundle 4 is cut and opened in advance.
Next, the end of the hollow fiber membrane bundle 4 is inserted into the slit 12 of the housing 2 so that the open end 9 of the hollow fiber membrane 3 is located in the internal path 11 of the housing 2.
[0030]
After the end of the hollow fiber membrane bundle 4 is accommodated in the housing 2, the end caps 7 and 8 are attached to the housing 2.
Next, the resin injecting portion 15 is filled with liquid fixing resin from the outside of the housing 2 while maintaining the open state of the open end 9 of the hollow fiber membrane 3. The hollow fiber membrane bundle 4 is fixed to the housing 2 by solidifying the fixing resin.
[0031]
When it is difficult to insert the hollow fiber membrane bundle 4 where the width of the slit 12 is large, a means for expanding the slit 12 at the time of insertion may be used in combination.
The hollow fiber membrane bundle 4 in which the end of the hollow fiber membrane 3 is opened in advance is inserted into the housing 2 through the slit 12 and then fixed with resin, so that the hollow fiber membrane inside the housing, which is necessary in the conventional method, is obtained. There is no need to cut the resin for opening, and the diameter of the housing can be designed to be thin.
[0032]
In such a hollow fiber membrane module 1, the housing 2 has the weirs 14 provided on both sides of the slit 12 in parallel with the slit 12, and the weir 14 is connected to the weir body 17. Since the bent portion 19 is bent outward from the tip 18, injection of the fixing resin into the resin injection portion is facilitated. Further, since the bent portion 19 is provided, deformation of the housing 2 during molding is reduced, and a sufficient capacity of the resin injection portion 15 sandwiched between the weirs 14 can be ensured. Thereby, the hollow fiber membrane bundle 4 is reliably fixed to the housing 2 by the fixing resin 5, and the yield of the hollow fiber membrane module 1 is improved.
[0033]
Moreover, in such a hollow fiber membrane module 1, since the dam 14 has the bending part 19 bent outward from the front-end | tip 18 of the dam main body 17, the resin injection | pouring part pinched | interposed into the dam 14 A sufficient capacity of 15 can be secured, and even if there is some variation in the amount of resin injected during potting, variation in the thickness of the fixing resin after potting is reduced. Thereby, the pressure resistance performance of the hollow fiber membrane module 1 is improved.
[0034]
Moreover, in such a hollow fiber membrane module 1, since the bending part 19 of the weir 14 plays the role of a rib, it is excellent in pressure resistance, and when the several hollow fiber membrane module 1 is integrated and united, In addition, the integration rate of the hollow fiber membrane module can be designed high. Therefore, such a hollow fiber membrane module 1 can be suitably used for a filtration process or the like in a place where the size of the unit is restricted.
[0035]
In addition, the shape of the housing in the hollow fiber membrane module of the present invention is not limited to a cylindrical shape having a U-shaped cross section as illustrated, and may be a cylindrical shape or a rectangular shape.
Further, a prismatic or flat member may be provided on the side wall of the housing 2 on the opposite side of the weir 14. By providing such a member, the stability of the housing 2 can be increased and the housing 2 can be self-supporting, and the handleability at the time of manufacturing the hollow fiber membrane module 1 is improved. Further, the strength of the housing 2 itself is improved.
[0036]
Further, from the viewpoint of improving the shape stability of the internal passage 11 in the housing 2 when molding the housing 2 and improving the dimensional accuracy of the entire housing 2, as shown in FIG. It is preferable that the weir-shaped protrusion 23 is provided and the cross-sectional shape of the housing 2 is substantially H-shaped.
When such a ridge 23 is provided, in addition to the above-described advantages, during a series of operations in which the slit 12 is opened and the hollow fiber membrane bundle 4 is inserted, pressure is applied to the ridge 23 from the outside. By inclining inward, the slit 12 can be expanded.
[0037]
Further, as shown in FIG. 8, when only the weir 14 is provided, or when the protruding portion 23 is provided but the bent portion 23 is not provided with the bent portion 23, the adjacent hollow fiber membrane modules 1 are adjacent to each other. The contact of the bent portion 19 of the weir 14 due to the displacement of the housing 2 may not only damage the housing 2 but also damage the hollow fiber membrane 3. Therefore, as shown in FIG. 9, if the bent portions 24 that are bent outward are formed at both ends of the ridge 23, the housing 2 is not displaced, and the occurrence of scratches due to the accumulation of the hollow fiber membrane modules 1 is suppressed. be able to.
[0038]
【Example】
Hereinafter, the present invention will be described in detail with reference to examples.
Example 1
100 housings 2 made of ABS resin as shown in FIG. 3 were manufactured. Here, the height of the weir 14 of the housing 2 is 7 mm, the bending angle α of the bent portion 19 is 30 °, the distance C between the tip 22 of one weir 14 and the tip 22 of the other weir 14 is 13 mm, The housing 2 was manufactured so that the width of the slit 12 was 0.8 mm.
In the housing 2, the dimensional tolerance of the gap C was set to +0.5 mm, but no variation outside the dimensional tolerance was observed in all manufactured housings.
[0039]
Next, the end of the hollow fiber membrane bundle 4 was inserted into the slit 12 of the housing 2 so that the open end 9 of the hollow fiber membrane 3 was located in the internal path 11 of the housing 2. Thereafter, the end caps 7 and 8 were attached to the housing 2, and a liquid fixing resin was filled into the resin injection portion 15 from the outside of the housing 2 while keeping the open end 9 of the hollow fiber membrane 3 open. The fixing resin was solidified to obtain a hollow fiber membrane module 1.
[0040]
Here, as the hollow fiber membrane bundle 4, one made of Mitsubishi Rayon Co., Ltd. polyethylene hollow fiber membrane (fractionation performance 0.4 μm, outer diameter 540 μm) formed into a knitted fabric was used per module. Further, a polyurethane resin was used as the fixing resin.
In all 100 housings 2 used in the hollow fiber membrane module 1, no dripping of the fixing resin to the outside of the housing 2 was observed.
[0041]
Further, the hollow fiber membrane 3 is cut at the portion of the fixing resin 5 of the obtained hollow fiber membrane module 1 and the opened hollow fiber membrane 3 is sealed with resin to obtain a housing pressure test sample. It was. Using this sample, a pressure resistance test was repeatedly performed. The test was performed by intermittently applying a water pressure of 98 KPa from the secondary side. The time for applying the load was 6 seconds, the time for not applying the load was 4 seconds, and this was one cycle.
Even when the cycle reached 200,000 times, the sample was not damaged and the housing showed sufficient pressure resistance. Moreover, after carrying out a pressure | voltage resistance test, when the sample was cut and the inside was observed, it confirmed that the resin thickness was uniform and the hollow fiber membrane module was produced favorably.
[0042]
(Comparative Example 1)
As shown in FIG. 11, a housing and a hollow fiber membrane module were produced in the same manner as in Example 1 except that a bent portion was not formed on the weir of the housing.
In the housing 32, the dimensional tolerance of the distance between the tip of one weir 33 and the tip of the other weir 33 is set to +0.5 mm, but 70% of the manufactured housing is out of the dimensional tolerance. There was considerable variation in the distance between the dam and the weir.
[0043]
Further, in 10 out of 100 housings 32 used in the hollow fiber membrane module 31, the fixing resin was found to sag outside the housing 32.
As a result of checking the housing that caused this resin dripping, 7 out of 10 had a structure in which the distance between the weirs was out of tolerance, and the weirs on both sides fell slightly inward.
[0044]
Furthermore, using the hollow fiber membrane module in which the resin sag occurred, a repeated pressure resistance test similar to that in Example 1 was performed under the same conditions. One of the 10 was leaked when the number of repetition exceeded 100,000. Occurred. Examination of the leak location revealed that the thickness of the fixing resin was partially reduced.
[0045]
【The invention's effect】
As described above, in the hollow fiber membrane module of the present invention, the hollow fiber membrane bundle in which a plurality of hollow fiber membranes are bundled in a sheet shape is fixed to the cylindrical housing while maintaining the open state of the end portion of the hollow fiber membrane. A hollow fiber membrane module fixed with resin for use, wherein the housing has a slit for inserting the end of the hollow fiber membrane bundle into the housing, both sides of the slit, and parallel to the slit And the dam has a dam body and a bent portion bent outward from the tip of the dam body, so that the dimensional accuracy of the housing, the hollow fiber membrane collapses, etc. The potting failure due to the influence of can be almost eliminated. Therefore, the hollow fiber membrane is reliably fixed to the housing by the fixing resin, and the yield is improved. In addition, there is no potting failure, the hollow fiber membrane is securely fixed to the housing with the fixing resin, and the thickness of the fixing resin is uniform, so that the pressure resistance is excellent. Furthermore, since the pressure resistance is excellent, the lamination rate per unit volume when unitized can be set high, and can be efficiently used for solid-liquid separation in sewage treatment and industrial wastewater treatment.
[0046]
If the height of the weir body is 10 to 90% of the entire height of the weir, the thickness of the fixing resin can be secured, and the pressure resistance of the hollow fiber membrane module can be maintained.
The ratio between the distance between the tip of one weir and the tip of the other weir and the distance between the base end of one weir and the base end of the other weir is 10: 9 to 2: 1. If it is, it will become easy to inject | pour resin for fixing into a resin injection | pouring part, and the amount of resin required for fixation can be suppressed.
Further, if the cross-sectional shape perpendicular to the longitudinal direction of the housing is substantially H-shaped, the shape of the internal path in the housing at the time of molding the housing is stabilized, and the dimensional accuracy of the entire housing is improved.
Moreover, if the thickness of the said slit is 0.1-20 mm, a hollow fiber membrane can be hold | gripped firmly, an effective membrane area can be ensured, and pressure | voltage resistant performance can be maintained.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of a hollow fiber membrane module of the present invention.
FIG. 2 is a cross-sectional view of a housing in the hollow fiber membrane module of FIG.
FIG. 3 is a perspective view showing an example of a housing according to the present invention.
FIG. 4 is a sectional view of a housing for explaining a bending angle α of a bent portion of the weir.
FIG. 5 is a cross-sectional view of a housing for explaining a bending angle α of a bent portion of the weir.
FIG. 6 is a sectional view of a housing for explaining a bending angle α of a bent portion of the weir.
FIG. 7 is a cross-sectional view showing another example of a housing according to the present invention.
FIG. 8 is a cross-sectional view showing an example of the state of adjacent housings when the hollow fiber membrane module of the present invention is unitized.
FIG. 9 is a cross-sectional view showing another example of the state of adjacent housings when the hollow fiber membrane module of the present invention is unitized.
FIG. 10 is a perspective view showing an example of a conventional hollow fiber membrane module.
11 is a cross-sectional view of a housing in the hollow fiber membrane module of FIG.
[Explanation of symbols]
1 Hollow fiber membrane module
2 Housing
3 Hollow fiber membrane
4 Hollow fiber membrane bundle
5 Fixing resin
9 Open end
12 Slit
14 Weir
16 Base end of weir
17 Weir body
18 Tip of weir body
19 Bent part
22 The tip of the weir

Claims (5)

A hollow fiber membrane module in which a plurality of hollow fiber membranes are bundled in a sheet shape, and the hollow fiber membrane module is fixed to a cylindrical housing with a fixing resin while maintaining an open state of the hollow fiber membrane end,
The housing has a slit for inserting the end of the hollow fiber membrane bundle into the housing, and a weir provided on both sides of the slit and in parallel with the slit,
The hollow fiber membrane module, wherein the weir has a weir body and a bent portion bent outward from the tip of the weir body. The hollow fiber membrane module according to claim 1, wherein the height of the weir body is 10 to 90% of the height of the entire weir. The ratio of the distance between the tip of one weir and the tip of the other weir and the distance between the base end of one weir and the base end of the other weir is 10: 9 to 2: 1. The hollow fiber membrane module according to claim 1 or 2, wherein The hollow fiber membrane module according to any one of claims 1 to 3, wherein a cross-sectional shape perpendicular to the longitudinal direction of the housing is substantially H-shaped. The hollow fiber membrane module according to any one of claims 1 to 4, wherein the slit has a thickness of 0.1 to 20 mm.

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