Hollow fiber membrane module

Abstract

Provided is a hollow fiber membrane module capable of suppressing production costs. The housing (100) has a first pipe section (111) and a second pipe section (112), and is provided with a holding member (210) for holding the plurality of hollow fiber membranes (220) inside the housing (100), the holding member (210) being provided with a first plate-like section (211) and a second plate-like section (212) provided so as to sandwich the plurality of hollow fiber membranes (220), and a connecting section (215) for connecting the first plate-like section (211) and the second plate-like section (212). A passage from the first piping section (111) to the first plate-shaped section (211) is formed between the first plate-shaped section (211) and the housing (100), and a passage from the second piping section (112) to the second plate-shaped section (212) is formed between the second plate-shaped section (212) and the housing (100).

Description

Technical Field

[0001] The present invention relates to a hollow fiber membrane module. Background Art

[0002] In a humidifying device for a fuel cell for automotive use, a hollow fiber membrane module is provided. In such a device, the demand for high-output systems is continuously increasing, and the hollow fiber membrane module also tends to be enlarged. Refer to Figure 7 and the prior art hollow fiber membrane module will be described. Figure 7 is a schematic structural view of a prior art hollow fiber membrane module, Figure 7 (a) of is a front view of the hollow fiber membrane module, Figure 7 (b) of is a sectional view taken along line BB in (a) of this Figure 7

[0003] The prior art hollow fiber membrane module 500 includes a hollow fiber membrane module main body 510 and a pair of cover members 520 and 530 attached to the hollow fiber membrane module main body 510. The hollow fiber membrane module main body 510 includes a housing 511 and a plurality of hollow fiber membranes 512 accommodated in the housing 511. The housing 511 has a receiving portion with openings at both ends, and a plurality of hollow fiber membranes 512 are accommodated in this receiving portion. Openings 521 and 531 serving as fluid inlets and outlets are provided in the pair of cover members 520 and 530, respectively. In addition, a plurality of through holes 511 are provided in the housing 511 for communicating the internal spaces of the cover members 520 and 530 with the receiving portion of the housing 511.

[0004] In addition, in the hollow fiber membrane module main body 510, a pair of seal fixing portions 513 and 514 are provided on one end side and the other end side of the housing 511 to seal the gaps between the plurality of hollow fiber membranes 512 in a state where the inner spaces of the plurality of hollow fiber membranes 512 are open. The annular gap between the inner peripheral surface of the housing 511 and the pair of seal fixing portions 513 and 514 is sealed with a liquid gasket.

[0005] In the hollow fiber membrane module 500 configured as described above, for example, from the opening 521 to the opening 531, the humid gas flows in a manner of passing outside the membranes of the plurality of hollow fiber membranes 512, and from the seal fixing portion 514 side to the seal fixing portion 513 side, the dry gas flows in a manner of passing through the inner spaces of the plurality of hollow fiber membranes 512, whereby the dry gas is humidified and the humid gas is dried.

[0006] In addition, by the spaces inside the cover members 520 and 530, a passage for the fluid (the humid gas in the above example) is ensured, so that the fluid can flow through the entire receiving portion of the housing 511.

[0007] In such a structure, it is necessary to prevent fluid from leaking to the outside from the space between the housing 511 and the cover members 520 and 530. Therefore, gaskets G1 and G2 are respectively provided to seal the gaps between the housing 511 and the cover member 520 and between the housing 511 and the cover member 530. Here, the housing 511 and the cover members 520 and 530 are all resin molded products. In the case of a large hollow fiber membrane module 500, the housing 511 and the cover members 520 and 530 also become larger. Therefore, in order to obtain the desired sealing performance, in the housing 511 and the cover members 520 and 530, in order to improve the flatness of the portions where the gaskets G1 and G2 are in close contact, it is necessary to perform additional machining such as cutting after molding. As a result, it is difficult to suppress the manufacturing cost.

[0008] Prior art documents

[0009] Patent documents

[0010] Patent Document 1: Japanese Patent Application Laid-Open No. 2015-181986 Summary of the Invention

[0011] Problems to be Solved by the Invention

[0012] The present invention provides a hollow fiber membrane module capable of suppressing manufacturing costs.

[0013] Means for Solving the Problems

[0014] The present invention employs the following means to solve the above problems.

[0015] The hollow fiber membrane module of the present invention includes:

[0016] A plurality of hollow fiber membranes;

[0017] A housing that houses the plurality of hollow fiber membranes in a housing portion that is open at both ends;

[0018] A pair of sealing and fixing portions that seal the gaps between the plurality of hollow fiber membranes in a state where the hollow interiors of the plurality of hollow fiber membranes are open on one end side and the other end side of the housing;

[0019] The hollow fiber membrane module is characterized in that

[0020] The housing has a first piping portion and a second piping portion on both sides sandwiching the plurality of hollow fiber membranes,

[0021] The first piping portion communicates the inside and outside of the housing and serves as a passage for fluid to flow outside the membranes of the plurality of hollow fiber membranes,

[0022] The second piping portion communicates the inside and outside of the housing and serves as a passage for fluid to flow outside the membranes of the plurality of hollow fiber membranes,

[0023] A holding member for holding the plurality of hollow fiber membranes is provided in the housing.

[0024] The holding member includes:

[0025] A pair of plate-like portions which are arranged to sandwich the plurality of hollow fiber membranes and have a plurality of through-holes serving as passages for a fluid passing through outside the membranes of the plurality of hollow fiber membranes; and

[0026] A connecting portion for connecting the pair of plate-like portions;

[0027] A passage from the first piping portion to the first plate-like portion is formed between the first plate-like portion of one of the pair of plate-like portions and the housing, and a passage from the second piping portion to the second plate-like portion is formed between the second plate-like portion of the other of the pair of plate-like portions and the housing.

[0028] According to the present invention, since the first piping portion and the second piping portion are provided in the housing, there is no need to provide a gasket or the like as in the case of adopting a structure of mounting a cover member on the housing. And since a passage is formed between the pair of plate-like portions of the holding member provided in the housing and the housing, it is also possible to allow the fluid to flow in the entire region where the plurality of hollow fiber membranes are provided.

[0029] Preferably, the plurality of hollow fiber membranes are fixed to the holding member by the pair of sealing and fixing portions.

[0030] Thereby, it is possible to suppress the independent movement of the pair of sealing and fixing portions.

[0031] Preferably, a plurality of first support portions are provided on the first plate-like portion, and the first support portions abut against the inner peripheral surface of the housing and maintain the interval between the first plate-like portion and the inner peripheral surface of the housing.

[0032] A plurality of second support portions are provided on the second plate-like portion, and the second support portions abut against the inner peripheral surface of the housing and maintain the interval between the second plate-like portion and the inner peripheral surface of the housing.

[0033] Thereby, it is possible to maintain the interval between the first plate-like portion and the inner peripheral surface of the housing and the interval between the second plate-like portion and the inner peripheral surface of the housing, and it is possible to suppress the deformation of the first plate-like portion and the second plate-like portion.

[0034] Preferably, the annular gap between the pair of sealing and fixing portions and the housing is sealed by a sealing portion made of an elastic body.

[0035] Advantages of the Invention

[0036] As described above, according to the present invention, it is possible to achieve suppression of manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic structural diagram of a hollow fiber membrane module according to an embodiment of the present invention.

[0038] Figure 2 It is a schematic structural diagram of a hollow fiber membrane module according to an embodiment of the present invention.

[0039] Figure 3 It is a schematic structural diagram of a holding member according to an embodiment of the present invention.

[0040] Figure 4 It is a manufacturing process diagram of the hollow fiber membrane module according to the embodiment of the present invention.

[0041] Figure 5 It is a manufacturing process diagram of the hollow fiber membrane module according to the embodiment of the present invention.

[0042] Figure 6 It is a schematic structural diagram showing an application example of the hollow fiber membrane module according to the embodiment of the present invention.

[0043] Figure 7 It is a schematic structural diagram of a hollow fiber membrane module in the prior art. DETAILED DESCRIPTION

[0044] Hereinafter, the mode for implementing the present invention will be described in detail based on the embodiments with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative configurations, etc. of the components described in the embodiments are not intended to limit the scope of the present invention to them unless otherwise specified.

[0045] (Example)

[0046] Reference Figures 1 to 5 , a hollow fiber membrane module according to an embodiment of the present invention is described. Figure 1 is a schematic structural diagram of a hollow fiber membrane module according to an embodiment of the present invention, Figure 1 (a) is the front view of the hollow fiber membrane module. Figure 1 (b) is a top view of the hollow fiber membrane module. Figure 2 is a schematic structural diagram of a hollow fiber membrane module according to an embodiment of the present invention, Figure 2 (a) is a side view of the hollow fiber membrane module. Figure 2 (b) is Figure 1 A1-A1 cross-sectional view in (a) Figure 1 A2-A2 cross-sectional view in (b). Figure 3 is a schematic structural diagram of a retaining component of an embodiment of the present invention, Figure 3 (a) is the main view of the holding component, Figure 3 (b) is a top view of the holding component,Figure 3 Figure (c) is a side view of the holding member. Figure 4 and Figure 5 is a manufacturing process diagram of the hollow fiber membrane module according to an embodiment of the present invention. In addition, Figure 4 Figure (a) is a front view of an intermediate product in the manufacturing process, Figure 4 Figures (b) and (c), and Figure 5 are cross-sectional views of the intermediate product in the manufacturing process (corresponding to a partial cross-sectional view A1 - A1 in Figure (a) Figure 1 and a partial cross-sectional view A2 - A2 in Figure (b) Figure 1 of the present invention).

[0047] <Hollow fiber membrane module>

[0048] The hollow fiber membrane module 10 of the present embodiment includes a housing 100 and a hollow fiber membrane unit 200 accommodated in the housing 100. The housing 100 includes a cylindrical housing main body 110 and a pair of pipes provided on the housing main body 110 (hereinafter referred to as a first pipe portion 111 and a second pipe portion 112). In addition, the housing 100 is a resin molded product obtained by a mold, and the housing main body 110 and the first pipe portion 111 and the second pipe portion 112 are integrally formed. Both ends of the housing main body 110 are open, and its interior serves as a housing portion for accommodating a plurality of hollow fiber membranes 220. The housing main body 110 of the present embodiment is composed of a pair of flat plate-like portions and a pair of curved portions connecting both sides thereof, and has an elliptical shape when viewed from the front.

[0049] The first pipe portion 111 and the second pipe portion 112 communicate the outside of the housing 100 with the inside of the housing main body 110, forming a passage for the fluid flowing outside the membranes of the plurality of hollow fiber membranes 220. In addition, these first pipe portion 111 and second pipe portion 112 are respectively provided on the outer walls of a pair of flat plate-like portions in the housing main body 110. As described above, the first pipe portion 111 and the second pipe portion 112 that communicate the inside and outside of the housing and form a passage for the fluid flowing outside the membranes of the plurality of hollow fiber membranes 220 are respectively provided on both sides sandwiching the plurality of hollow fiber membranes 220.

[0050] The hollow fiber membrane unit 200 includes a holding member 210, a plurality of hollow fiber membranes 220 held by the holding member 210, and a pair of sealing and fixing portions 231, 232. The pair of sealing and fixing portions 231, 232 are configured to seal the gaps between the plurality of hollow fiber membranes 220 in a state where the inside of each hollow of the plurality of hollow fiber membranes 220 is open on one end side and the other end side of the housing 100. In addition, polyphenylsulfone (PPSU) can be preferably used as the material of the hollow fiber membrane 220, and epoxy resin can be preferably used as the material of the sealing and fixing portions 231, 232.

[0051] The holding member 210 can be made of a resin material. The holding member 210 includes: a pair of plate-like portions (hereinafter referred to as a first plate-like portion 211 and a second plate-like portion 212) configured to hold a plurality of hollow fiber membranes 220, and a connecting portion 215 that connects the first plate-like portion 211 and the second plate-like portion 212. A plurality of through holes 211a and 212a serving as passages for a fluid passing outside the membranes of the plurality of hollow fiber membranes 220 are provided in the first plate-like portion 211 and the second plate-like portion 212. The first plate-like portion 211 and the second plate-like portion 212 are configured to face a pair of flat plate-like portions in the housing body 110 of the housing 100 when the holding member 210 is accommodated inside the housing. Thereby, a passage from the first piping portion 111 to the first plate-like portion 211 is formed between the first plate-like portion 211 and the housing 100 (housing body 110). Similarly, a passage from the second piping portion 112 to the second plate-like portion 212 is formed between the second plate-like portion 212 and the housing 100. Through this passage, the fluid can flow through the entirety of the plurality of hollow fiber membranes 220 accommodated between the pair of plate-like portions 211 and 212.

[0052] In addition, a plurality of pin-shaped first support portions 213 that abut against the inner peripheral surface of the housing 100 (housing body 110) and maintain a gap between the first plate-like portion 211 and the inner peripheral surface of the housing 100 are provided on the first plate-like portion 211. Similarly, a plurality of pin-shaped second support portions 214 that abut against the inner peripheral surface of the housing 100 and maintain a gap between the second plate-like portion 212 and the inner peripheral surface of the housing 100 are provided on the second plate-like portion 212. Thereby, deformation of the first plate-like portion 211 and the second plate-like portion 212 can be suppressed, and a gap between a pair of flat plate-like portions in the housing body 110 and the pair of plate-like portions (first plate-like portion 211 and second plate-like portion 212) can be stably ensured.

[0053] <Manufacturing method of hollow fiber membrane module>

[0054] The manufacturing method of the hollow fiber membrane module 10 will be described in the order of manufacturing processes. First, the holding member 210 is inserted into the accommodating portion of the housing 100 (housing body 110). And a plurality of hollow fiber membranes 220 are respectively filled between the first plate-like portion 211 and the second plate-like portion 212 and on both sides of the connecting portion 215. Figure 4 FIG. (a) shows a state after a plurality of hollow fiber membranes 220 are filled. Next, sealing and fixing portions 231 and 232 are formed. In Figure 4 and Figure 5 what is shown is the formation process of the sealing and fixing portion 232, but the sealing and fixing portion 231 is the same.

[0055] First, a jig 400 for filling a liquid potting material such as epoxy resin is installed at the end of the housing main body 110. In this state, the liquid potting material 232a (refer to Figure 4 (b) thereof). In addition, the liquid potting material 232a can be injected from the injection port provided in the jig 400, or can be injected into the first piping portion 111 through a pipe or the like. Further, during the period from when the liquid potting material 232a is injected until the potting material 232a is cured, the liquid level of the potting material 232a can be maintained at a specified position by applying centrifugal force or the like.

[0056] After the potting material 232a is cured, the jig 400 is removed (refer to Figure 4 (c) thereof). Then, a part of the cured potting material 232a and a part of the front ends of the plurality of hollow fiber membranes 220 are cut off together. Figure 4 The single-dot chain line C in (c) thereof indicates the cut surface. Thereby, a sealing and fixing portion 232 is formed such that the hollow interiors of the plurality of hollow fiber membranes 220 are in an open state, and at the same time, the gaps between the plurality of hollow fiber membranes 220 are in a sealed state (refer to Figure 5 (a) thereof). In addition, in the present embodiment, both end portions of the holding member 210 are configured in a complicated structure. Thus, even if a force is applied to the cured sealing and fixing portion 232 in all directions, the sealing and fixing portion 232 is caught by the end portions of the holding member 210. For example, as shown in Figure 5 (a) thereof, via the portions protruding upward and downward in the drawing at the end portions of the holding member 210, a part of the sealing and fixing portion 232 exists on the end face side and the inner side of the housing 100, respectively. Therefore, the sealing and fixing portion 232 does not shift in the left-right direction in the drawing with respect to the holding member 210. Therefore, the sealing and fixing portion 232 does not come off from the holding member 210.

[0057] After the sealing and fixing portion 232 is formed, the adhesive portion between the housing main body 110 and the sealing and fixing portion 232 is peeled off. For example, by putting the intermediate product provided with the sealing and fixing portion 232 into a constant temperature bath and heating for a specified time, the adhesive portion between the housing main body 110 and the sealing and fixing portion 232 can be peeled off. After that, a liquid gasket 310 such as a silicone adhesive is injected into the annular gap between the housing main body 110 and the sealing and fixing portion 232 (refer to Figure 5 (b) thereof). By curing this liquid gasket 310, the annular gap between the housing main body 110 and the sealing and fixing portion 232 becomes a sealed state. That is, the annular gap between the sealing and fixing portion 232 and the housing 100 (housing main body 110) is sealed by the cured liquid gasket 310 (a sealing portion made of an elastic body).

[0058] Here, the reason for sealing the annular gap between the housing main body 110 and the sealing and fixing portion 232 with the liquid gasket 310 on the basis of peeling the adhesive portion therebetween will be briefly described. Since the linear expansion coefficients of the housing main body 110 and the sealing and fixing portion 232 are different, a force for peeling the housing main body 110 and the sealing and fixing portion 232 will be generated according to the ambient temperature. Therefore, the adhesive portion between the housing main body 110 and the sealing and fixing portion 232 may be peeled off over time. Especially when the hollow fiber membrane module 10 is large, the difference in the linear expansion coefficient cannot be ignored. Therefore, in the present embodiment, the following structure is adopted: on the basis of peeling the adhesive portion between the housing main body 110 and the sealing and fixing portion 232, the annular gap therebetween is sealed by the liquid gasket 310 that can also elastically deform after curing.

[0059] <Application Example of Hollow Fiber Membrane Module>

[0060] An application example of the hollow fiber membrane module 10 of the present embodiment will be described. The hollow fiber membrane module 10 of the present embodiment can be used as a humidifying device and a dehumidifying device. This will be briefly described below.

[0061] In the hollow fiber membrane module 10, there are provided an internal flow path that passes through the inside of the membranes of a plurality of hollow fiber membranes 220 and an external flow path that passes through the outside of the membranes of the hollow fiber membranes 220. For example, the internal flow path is configured such that dry gas flows from one end side of the housing 100 through the inside of the hollows of a plurality of hollow fiber membranes 220 to the other end side of the housing 100 (refer to the solid arrows in (b) of Figure 2 . In addition, for example, the external flow path is configured such that moist gas having a humidity higher than that of the dry gas flows from the first piping portion 111 through the accommodating portion of the housing 100 to the second piping portion 112 (refer to the dashed arrows in (b) of Figure 2 .

[0062] In addition, although not particularly illustrated, covers are installed at both ends of the housing 100, and the covers are provided with inlets and outlets for allowing fluid to flow in the internal flow path. Through these covers, the movement of the hollow fiber membrane unit 200 relative to the housing 100 is more reliably suppressed.

[0063] According to the above structure, through the membrane separation action of the hollow fiber membrane, moisture in the moist gas moves into the dry gas. Therefore, the dry gas is humidified and the moist gas is dehumidified, so that it can be used both as a humidifying device and as a dehumidifying device.

[0064] The hollow fiber membrane module 10 of the present embodiment can be suitably used as a humidifying device for humidifying the electrolyte membrane provided in the fuel cell 50. Refer to Figure 6, the structure in the case where the hollow fiber membrane module 10 is used as such a humidifying device will be described. As shown in the figure, dry air is sent to the in-membrane flow path of the hollow fiber membrane module 10 by a compressor 60 (refer to arrow R1). As described above, the dry air flowing in the in-membrane flow path is humidified and discharged from the hollow fiber membrane module 10. This humidified moist air is sent to the fuel cell 50 (refer to arrow R2). Thereby, the electrolyte membrane provided in the fuel cell 50 is maintained in a moist state. Then, the moist air generated in the fuel cell 50 is sent to the out-of-membrane flow path of the hollow fiber membrane module 10 (refer to arrow R3), and the dry air dehumidified by the membrane separation action of the hollow fiber membrane is discharged from the hollow fiber membrane module 10 (refer to arrow R4). In addition, the temperature of the moist air generated in the fuel cell 50 is high, but the temperature of the dry air sent from the compressor 60 is low. Therefore, the temperature of the moist air discharged from the hollow fiber membrane module 10 becomes low. In this way, the hollow fiber membrane module 10 also functions as a heat exchanger.

[0065] <Advantages of the hollow fiber membrane module of the present embodiment>

[0066] According to the hollow fiber membrane module 10 of the present embodiment, a first piping portion 111 and a second piping portion 112 are provided in the housing 100. Therefore, it is not necessary to provide a gasket or the like as in the case of adopting a structure in which a cover member is mounted on the housing. Thereby, bolts or the like for fixing the gasket and the housing and the cover member are not required, not only the number of components is reduced, but also processing for improving the flatness of the portion in the molded product that is in close contact with the gasket is not required. Therefore, suppression of the manufacturing cost can be achieved.

[0067] Moreover, since a passage is formed between a pair of plate-like portions (the first plate-like portion 211 and the second plate-like portion 212) provided in the holding member 210 provided in the housing 100 and the housing 100, it is also possible to allow the fluid to flow in the entire region where a plurality of hollow fiber membranes 220 are provided. Therefore, the humidifying efficiency and the dehumidifying efficiency can also be improved.

[0068] In addition, in the present embodiment, a plurality of hollow fiber membranes 220 are fixed to the holding member 210 by a pair of seal fixing portions 231, 232. Thereby, it is possible to suppress the independent movement of the pair of seal fixing portions 231, 232 respectively. Therefore, it is possible to suppress the stretching or flattening of the hollow fiber membranes 220, and it is possible to suppress the application of a load to the hollow fiber membranes 220.

[0069] (Others)

[0070] In the above-described holding member 210, a structure is preferably adopted in which a hollow portion 215a is provided inside the connecting portion 215 to connect the passage between the first plate-like portion 211 and the housing main body 110 and the passage between the second plate-like portion 212 and the housing main body 110. If such a structure is adopted, a passage is formed that directly reaches the second piping portion 112 from the first piping portion 111 without passing through the region filled with the plurality of hollow fiber membranes 220. Thus, for example, when the wet gas flows from the first piping portion 111 to the second piping portion 112, the pressure loss can be suppressed, and the load applied to the hollow fiber membranes 220 can be suppressed. Of course, depending on the use conditions, it is not necessarily required to provide the hollow portion 215a. In the above embodiment, the case where the hollow fiber membrane module 10 is used as a humidifying device or a dehumidifying device has been described. However, the hollow fiber membrane module of the present invention can also be applied to other uses such as a filtering device (for example, a device for performing cross-flow filtration).

[0071] Explanation of reference numerals:

[0072] 10: Hollow fiber membrane module

[0073] 100: Housing

[0074] 110: Housing main body

[0075] 111: First piping portion

[0076] 112: Second piping portion

[0077] 200: Hollow fiber membrane unit

[0078] 210: Holding member

[0079] 211: First plate-like portion

[0080] 212: Second plate-like portion

[0081] 211a, 212a: Through holes

[0082] 213: First support portion

[0083] 214: Second support portion

[0084] 215: Connecting portion

[0085] 215a: Hollow portion

[0086] 220: Hollow fiber membrane

[0087] 231, 232: Sealing and fixing portions

[0088] 232a: Potting material

[0089] 310: Liquid gasket

[0090] 400: Fixture

Claims

1. A hollow fiber membrane module, comprising: A plurality of hollow fiber membranes; A housing that houses the plurality of hollow fiber membranes in a receiving portion that is open at both ends; A pair of sealing and fixing portions that seal the gaps between the plurality of hollow fiber membranes in a state where the hollow interiors of the plurality of hollow fiber membranes are open, on one end side and the other end side of the housing; The hollow fiber membrane module is characterized in that The housing has a first piping portion and a second piping portion on both sides sandwiching the plurality of hollow fiber membranes, The first piping portion connects the inside and outside of the housing and serves as a passage for fluid to flow outside the membranes of the plurality of hollow fiber membranes, The second piping portion connects the inside and outside of the housing and serves as a passage for fluid to flow outside the membranes of the plurality of hollow fiber membranes, A holding member for holding the plurality of hollow fiber membranes is provided inside the housing, The holding member includes: A pair of plate-like portions that are arranged to sandwich the plurality of hollow fiber membranes and have a plurality of through holes, and the through holes serve as passages for fluid to pass through from outside the membranes of the plurality of hollow fiber membranes; And A connecting portion that connects the pair of plate-like portions; A passage from the first piping portion to the first plate-like portion is formed between the first plate-like portion of one of the pair of plate-like portions and the housing, and a passage from the second piping portion to the second plate-like portion is formed between the second plate-like portion of the other of the pair of plate-like portions and the housing.

2. The hollow fiber membrane module according to claim 1, wherein The plurality of hollow fiber membranes are fixed to the holding member by the pair of sealing and fixing portions.

3. The hollow fiber membrane module according to claim 1 or 2, characterized in that A plurality of first support portions are provided on the first plate-like portion, and the first support portions abut against the inner peripheral surface of the housing and maintain the interval between the first plate-like portion and the inner peripheral surface of the housing, A plurality of second support portions are provided on the second plate-like portion, and the second support portions abut against the inner peripheral surface of the housing and maintain the interval between the second plate-like portion and the inner peripheral surface of the housing.

4. The hollow fiber membrane module according to claim 1 or 2, characterized in that, The annular gap between the pair of sealing and fixing portions and the housing is sealed by a sealing portion made of an elastic body.

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