JP2016034612A - Manufacturing method of hollow fiber membrane module, and hollow fiber membrane module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a hollow fiber membrane module, and the hollow fiber membrane module which can suppress breakage of a hollow fiber membrane without requiring a protective member.SOLUTION: A manufacturing method includes: a process of attaching a hollow fiber membrane bundle 10 in a folded state to a first member 21 so that both ends of the hollow fiber membrane bundle 10 face an opening part side of a case main body 20; a process of forming the case main body 20 by combining a second member 22 with the first member 21; a process of fitting a bottomed cylindrical adaptor having an injection part to an outer periphery of the case main body 20 from the opening part side; a process of injecting sealing material from the injection part; a process of opening a hollow inside of each hollow fiber membrane by cutting a part of the adaptor with both of the end parts of the hollow fiber membrane bundle 10 fixed to the case main body 20 by the sealing material after the sealing material is cured.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a method for producing a hollow fiber membrane module and a hollow fiber membrane module.

  In the all-filtration type hollow fiber membrane module, the hollow fiber membrane bundle is stored in a bottomed cylindrical case in a folded state. Therefore, in the operation of mounting the hollow fiber membrane bundle in the case, it is necessary to bend the hollow fiber membrane bundle and insert the hollow fiber membrane bundle from the opening of the bottomed cylindrical case. At this time, since the hollow fiber membrane bundle slides between the inner wall surface of the case, the outer side of the folded hollow fiber membrane bundle is protected with a nonwoven fabric or the like so that the hollow fiber membrane is not damaged. (See Patent Document 1). This point will be described with reference to FIG. FIG. 13 is a process diagram of mounting a hollow fiber membrane bundle to a case in a hollow fiber membrane module according to a conventional example.

  First, the hollow fiber membrane bundle 610 is bent so that each hollow fiber membrane is U-shaped. And the outer side of the folded hollow fiber membrane bundle 610 is covered with protective members 611, such as a nonwoven fabric. Thereafter, the hollow fiber membrane bundle 610 covered with the protective member 611 is mounted in a bottomed cylindrical case 620. At this time, the hollow fiber membrane does not slide between the case 620 even if it slides between the protective member 611 and the inner wall surface of the case 620.

  As described above, the provision of the protective member 611 can prevent the hollow fiber membrane from being damaged by sliding. However, the protective member 611 needs to be formed into dimensions and shapes according to various cases 620. For this reason, the cost increases with an increase in the number of parts.

Japanese Patent Laid-Open No. 3-169329

  The objective of this invention is providing the manufacturing method of a hollow fiber membrane module and a hollow fiber membrane module which can suppress the failure | damage of a hollow fiber membrane, without requiring a protection member.

  The present invention employs the following means in order to solve the above problems.

That is, the manufacturing method of the hollow fiber membrane module of the present invention,
Both ends of the hollow fiber membrane bundle are attached to one of the first member and the second member divided into two so that the bottomed cylindrical member serving as the case body is divided from the opening side toward the bottom side. Attaching the hollow fiber membrane bundle in a folded state so that it faces the opening side;
Combining the other member of the first member and the second member with the one member to form the case body;
A step of fitting a bottomed cylindrical adapter having an injection part for injecting a sealing material from the opening side to the outer periphery of the case body;
Injecting a sealing material from the injection part;
After the sealing material is cured, a part of the adapter is fixed to the case body with the sealing material in a state in which the fitting portion of the adapter fitted to the case body remains. A step of opening the hollow interior of each hollow fiber membrane by cutting both ends of the hollow fiber membrane bundle,
It is characterized by having.

  Here, “divided from the opening side to the bottom side” in the present invention does not necessarily mean that the bottomed cylindrical member is divided by cutting. That is, the first member and the second member may be obtained by cutting the bottomed cylindrical member, but the first member and the second member may be formed separately.

  According to the present invention, the hollow fiber membrane bundle is attached to one member of the first member and the second member, and then the other member of the first member and the second member is combined with the one member. Thus, the hollow fiber membrane bundle is stored in the case body. Therefore, in the process of attaching the hollow fiber membrane bundle to the case body, there is almost no sliding between the hollow fiber membrane and the inner wall surface of the case body. Therefore, the breakage of the hollow fiber membrane caused by sliding can be suppressed without requiring a protective member such as a nonwoven fabric.

  Moreover, the hollow fiber membrane module obtained by the manufacturing method of this invention will be in the state by which the fitting part which is a part of adapter was left with respect to the case main body. Thereby, it will be in the state where the 1st member and the 2nd member were fixed more firmly.

  Here, in the present invention, as described above, although the fitting portion that is a part of the adapter is left, the number of parts required for manufacturing the hollow fiber membrane module is increased as compared with the conventional example. There is no. That is, conventionally, when manufacturing a hollow fiber membrane module, a bottomed cylindrical adapter is required to inject a sealing material into the case. In the present invention, a part of the adapter originally required is used as a member for firmly fixing the first member and the second member, and the number of parts is increased compared to the conventional case. I don't mean.

The hollow fiber membrane module of the present invention is
A case having an opening on one end side;
A hollow fiber membrane bundle housed in the case in a state where both ends are bent toward the opening side,
A sealing and fixing portion that fixes both ends of the hollow fiber membrane bundle to the case on one end side of the case while opening the hollow interior of each hollow fiber membrane,
In a hollow fiber membrane module comprising:
The case is
A case body composed of a first member and a second member divided into two so that the bottomed cylindrical member is divided from the opening side toward the bottom side;
An annular member that is fitted to the outer periphery of the case body and fixes the first member and the second member;
It is characterized by providing.

  By adopting the hollow fiber membrane module configured as described above, the manufacturing method described above can be used.

  A bottomed cylindrical adapter having an injection part for injecting a sealing material is fitted to the case body, and a part of the adapter is cut after the sealing material injected from the injection part is cured. Thus, the annular member is preferably obtained.

  As described above, according to the present invention, breakage of the hollow fiber membrane can be suppressed without the need for a protective member.

FIG. 1 is a front view of a hollow fiber membrane module according to Embodiment 1 of the present invention. FIG. 2 is a partially broken cross-sectional view of the hollow fiber membrane module according to Example 1 of the present invention. FIG. 3 is a partially broken cross-sectional view showing a usage example of the hollow fiber membrane module according to Embodiment 1 of the present invention. FIG. 4 is an explanatory view of a mounting process of the hollow fiber membrane bundle according to Example 1 of the present invention. FIG. 5 is an explanatory view of a mounting process of the hollow fiber membrane bundle according to Example 1 of the present invention. FIG. 6 is an explanatory diagram of an adapter fitting process according to the first embodiment of the present invention. FIG. 7 is a partially broken cross-sectional view showing a state in which the adapter is attached to the case main body according to the first embodiment of the present invention. FIG. 8 is an explanatory diagram of a filling process of the sealing material according to the first embodiment of the present invention. FIG. 9 is an explanatory diagram of an adapter cutting process according to the first embodiment of the present invention. FIG. 10 is an explanatory diagram of a mounting process of the seal ring according to the first embodiment of the present invention. FIG. 11 is a partially broken cross-sectional view of a hollow fiber membrane module according to Example 2 of the present invention. FIG. 12 is a partially broken cross-sectional view of a hollow fiber membrane module according to Example 3 of the present invention. FIG. 13 is a process diagram of mounting a hollow fiber membrane bundle to a case in a hollow fiber membrane module according to a conventional example.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be exemplarily described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention only to those unless otherwise specified. .

Example 1
With reference to FIGS. 1-10, the manufacturing method and hollow fiber membrane module of a hollow fiber membrane module which concern on Example 1 of this invention are demonstrated.

<Hollow fiber membrane module>
In particular, with reference to FIG. 1 and FIG. 2, the total filtration type hollow fiber membrane module manufactured by the manufacturing method of the hollow fiber membrane module which concerns on a present Example is demonstrated. FIG. 1 is a front view of a hollow fiber membrane module according to Embodiment 1 of the present invention. FIG. 2 is a partially broken cross-sectional view of the hollow fiber membrane module according to Example 1 of the present invention. FIG. 1 corresponds to FIG. 2 as viewed from the left side in the figure. Moreover, about FIG. 2, the upper half in FIG. 2 is shown with sectional drawing.

  The hollow fiber membrane module 100 according to the present embodiment includes a case body 20, a hollow fiber membrane bundle 10 housed in the case body 20, an annular member 30 fitted to the case body 20, and a sealing fixing portion 40. And. The case body 20 and the annular member 30 constitute a case having an opening on one end side. Further, a seal ring (here, O-ring) 200 is mounted on the outer peripheral side of the annular member 30.

The case body 20 is a bottomed cylindrical member. The case body 20 is configured by combining a first member 21 and a second member 22 that are divided into two so that a bottomed cylindrical member is divided from the opening side toward the bottom side. The case body 20 is made of a resin material, and the first member 21 and the second member 22 are separately molded. In the present embodiment, the first member 21 and the second member 22 have the same configuration. Moreover, in a present Example, a cylindrical part is cylindrical shape among bottomed cylindrical members. However, in this invention, the cylindrical part in a bottomed cylindrical member is not limited to a cylindrical shape, Other shapes can also be employ | adopted. The case body 20 is provided with a plurality of through holes 23 on the side wall and the bottom. Further, an annular groove 24 is provided on the inner wall surface of the case body 20 in the vicinity of the opening. In addition, since the case main body 20 is comprised by the 1st member 21 and the 2nd member 22, about the part equivalent to the annular groove 24, the undercut part at the time of shape | molding the 1st member 21 and the 2nd member 22 It will not be.

  The hollow fiber membrane bundle 10 is accommodated in the case in a state where both ends are bent so as to face the opening side of the case. The hollow fiber membrane bundle 10 is bent so that each hollow fiber membrane has a U shape. And while the hollow inside of each hollow fiber membrane is open | released, the both ends of the hollow fiber membrane bundle 10 are being fixed to the case by the sealing fixing | fixed part 40 at the one end side of the case. More specifically, the hollow fiber membrane bundle 10 is fixed to the case in a state where the hollow interior of each hollow fiber membrane is opened and the opening of the case is sealed by the sealing and fixing portion 40. The sealing fixing part 40 is configured by a sealing material (potting material) such as a cured epoxy resin. In addition, the sealing and fixing portion 40 also plays a role of fixing the first member 21 and the second member 22, and the case body 20 and the annular member 30.

<Usage example of hollow fiber membrane module>
With reference to FIG. 3, the usage example of the hollow fiber membrane module which concerns on a present Example is demonstrated. The hollow fiber membrane module 100 according to the present embodiment is attached to the tubular member 300. An annular gap between the hollow fiber membrane module 100 and the tubular member 300 is sealed by a seal ring 200. In the figure, when a liquid to be filtered flows in the direction of the arrow A1, all the liquid flows into the hollow fiber membrane. Then, the liquid filtered by the membrane wall of the hollow fiber membrane flows from the inside of the case through the plurality of through holes 23 to the outside of the case, and then flows in the direction of arrow A2 in the drawing. As described above, using the hollow fiber membrane module 100 according to the present embodiment, the liquid can be filtered to remove impurities and the like. Note that the liquid can be filtered even if the liquid to be filtered flows in the direction opposite to that in FIG.

<Method for producing hollow fiber membrane module>
In particular, with reference to FIGS. 4 to 10, a manufacturing method of the hollow fiber membrane module according to the present embodiment will be described in the order of the manufacturing process.

<< Hollow fiber membrane bundle mounting process >>
First, the hollow fiber membrane bundle 10 is bent so that each hollow fiber membrane has a U-shape. Then, the hollow fiber membrane bundle 10 is mounted on the first member 21 so that both ends of the hollow fiber membrane bundle 10 face the opening side of the case body 20 (see FIG. 4). Then, the case body 20 is formed by combining the second member 22 with the first member 21 (see FIG. 5).

<< Adapter fitting process >>
With the hollow fiber membrane bundle 10 attached to the case body 20, the adapter 30 a is fitted to the outer periphery of the case body 20. The adapter 30a is fitted from the opening side of the case body 20 (see FIG. 6). Here, the adapter 30 a includes a bottomed cylindrical body portion 31 and a tubular portion 32 provided on the bottom side of the body portion 31. The tubular portion 32 is an injection portion for injecting a sealing material (potting material) such as an epoxy resin. In addition, an annular mounting groove 31a to which the seal ring 200 is mounted and an annular groove 31b to be cut are formed on the outer periphery of the body portion 31.

  FIG. 7 is a partially broken sectional view of the intermediate product 100a of the hollow fiber membrane module after the fitting process of the adapter 30a.

<< Sealing material filling process >>
In the manufacturing method according to the present embodiment, a sealing material (potting material) is injected into the intermediate product 100a by centrifugal potting. Since the centrifugal potting method is a known technique (for example, see Japanese Patent Laid-Open No. 5-168867), it will be briefly described with reference to FIG. First, a plurality of intermediate products 100 a are arranged on the turntable 510. Then, by rotating the turntable 510, the sealing material stored in the tank 520 in advance is supplied to each intermediate product 100a via the plurality of supply pipes 530. And the sealing material supplied to each intermediate product 100a is supplied in a case from the tubular part 32 of the adapter 30a. Since the centrifugal force acts in the intermediate product 100a, the sealing material is filled in the vicinity of the opening of the case inside the case. Then, after the sealing material is cured, the turntable 510 is stopped. Thereafter, the intermediate product 100 b of the hollow fiber membrane module after the sealing material filling step is removed from the turntable 510.

<< Adapter cutting process >>
The intermediate product 100b is cut by the cutting tool 600 along the annular groove 31b provided in the adapter 30a (see FIG. 9). As a result, a part of the adapter 30a is made of the case main body 20 by the sealing material 40a in a state where the fitting portion (corresponding to the annular member 30 described above) fitted to the case main body 20 in the adapter 30a remains. The both ends of the hollow fiber membrane bundle 10 fixed to are cut. Thereby, the hollow interior of each hollow fiber membrane in the hollow fiber membrane bundle 10 is opened. As described above, the hollow fiber membrane module 100 is manufactured. The sealing material 40a is also filled in the annular groove 24 provided on the inner wall surface of the case body 20. Thereby, since the annular fixing part 40 which fits in the annular groove 24 is formed in the sealing fixing part 40 obtained by the cutting process of the adapter 30a, it is more reliable that the sealing fixing part 40 is detached from the case body 20. Can be suppressed.

<< Seal ring installation process >>
After the hollow fiber membrane module 100 is manufactured, the seal ring 200 is mounted in the mounting groove 31a provided on the outer periphery of the annular member 30 (see FIG. 10).

<The manufacturing method of the hollow fiber membrane module which concerns on a present Example, and the outstanding point of a hollow fiber membrane module>
According to the method for manufacturing the hollow fiber membrane module 100 according to the present embodiment, the case main body 20 is obtained by attaching the hollow fiber membrane bundle 10 to the first member 21 and then combining the second member 22 with the first member 21. The hollow fiber membrane bundle 10 is accommodated in the container. Therefore, in the process of attaching the hollow fiber membrane bundle 10 to the case body 20, almost no sliding occurs between the hollow fiber membrane and the inner wall surface of the case body 20. Therefore, the breakage of the hollow fiber membrane caused by sliding can be suppressed without requiring a protective member such as a nonwoven fabric. In the present embodiment, the first member 21 and the second member 22 have the same configuration. Therefore, for the mounting process of the hollow fiber membrane bundle in the present embodiment, “the case main body 20 is mounted by mounting the hollow fiber membrane bundle 10 on the second member 22 and then combining the first member 21 with the second member 22. It can also be said that the hollow fiber membrane bundle 10 is accommodated in the container.

  Moreover, the hollow fiber membrane module 100 obtained by the manufacturing method of the present invention is in a state in which the fitting portion (annular member 30) that is a part of the adapter 30 a is left with respect to the case body 20. That is, the annular member 30 is fitted to the outer periphery of the case main body 20 obtained by combining the first member 21 and the second member 22. Therefore, the first member 21 and the second member 22 are more firmly fixed.

Here, in the hollow fiber membrane module 100 according to the present embodiment, as described above, the fitting portion (annular member 30) which is a part of the adapter remains, but compared with the conventional example, the hollow fiber membrane module. The number of parts required for manufacturing 100 is not increased. That is, conventionally, when manufacturing a hollow fiber membrane module, a bottomed cylindrical adapter is required to inject a sealing material into the case. In the conventional example, after injecting the sealing material into the case, a part of the case is cut together with the adapter, and the adapter part is removed. In the present embodiment, only a part of the adapter 30a originally required is used as a member for firmly fixing the first member 21 and the second member 22, so that the number of parts can be increased as compared with the conventional case. Is not necessarily increasing.

(Example 2)
FIG. 11 shows a second embodiment of the present invention. In the present embodiment, a configuration in a case where the shape of the case main body is different from that in the first embodiment is shown. Since other configurations and operations are the same as those in the first embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.

  Also in the hollow fiber membrane module 100 according to the present embodiment, as in the case of the first embodiment, the case body 20a, the hollow fiber membrane bundle 10 accommodated in the case body 20a, and the case body 20a are fitted. An annular member 30 and a sealing fixing part 40 are provided. In the present embodiment, the shape of the case main body 20a is different from the shape of the case main body 20 shown in the first embodiment. Since the configurations of the other hollow fiber membrane bundle 10, the annular member 30, and the sealing and fixing portion 40 are the same as those shown in the first embodiment, the description thereof is omitted. Moreover, since the manufacturing method of the hollow fiber membrane module 100 is also as described in Example 1, the description thereof is omitted.

  Similarly to the case of the first embodiment, the case main body 20a according to the present embodiment is divided into two so that the bottomed cylindrical member is divided from the opening side toward the bottom side. And the second member 22a is combined. The case body 20a is made of a resin material, and the first member 21a and the second member 22a are molded separately. In the present embodiment, the first member 21a and the second member 22a have the same configuration. And in the case of a present Example, the cylindrical part in case main body 20a consists of 20A of small diameter parts by the side of an opening part, the taper part 20B which expands toward the bottom side, and the large diameter part 20C of the bottom side. It is configured. In the present embodiment, a plurality of through holes 23 are provided on the side wall and the bottom of the case body 20a. An annular groove 24 is provided in the vicinity of the opening on the inner wall surface of the case body 20a.

  Here, the case main body 20a according to the present embodiment is configured by combining the first member 21a and the second member 22a which are divided into two. Accordingly, the cylindrical portion of the case main body 20a is composed of the small diameter portion 20A, the taper portion 20B, and the large diameter portion 20C, but when the first member 21a and the second member 22a are formed, the undercut portion is formed. Can be eliminated.

  As described above, the manufacturing method described in Example 1 can also be applied to the hollow fiber membrane module 100 according to the present example. In the case of the hollow fiber membrane module 100 according to the present embodiment, the case body 20a is provided with a tapered portion 20B and a large diameter portion 20C. Therefore, the space in which the hollow fiber membrane bundle 10 is accommodated is wider than that in the first embodiment. Therefore, compared with the case of Example 1, since a clearance gap is ensured enough between hollow fiber membranes, turbidity performance can be improved.

(Example 3)
FIG. 12 shows a third embodiment of the present invention. In the present embodiment, a configuration in a case where the shape of the case main body and the shape of the annular member are different from those in the first embodiment is shown. Since other configurations and operations are the same as those in the first embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.

  Also in the hollow fiber membrane module 100 according to the present embodiment, as in the case of the first embodiment, the case main body 20b, the hollow fiber membrane bundle 10 accommodated in the case main body 20b, and the case main body 20b are fitted. An annular member 30A and a sealing fixing portion 40 are provided. In the present embodiment, the shape of the case main body 20b and the shape of the annular member 30A are different from the shapes of the case main body 20 and the annular member 30 shown in the first embodiment. Since the other configurations of the hollow fiber membrane bundle 10 and the sealing and fixing unit 40 are the same as those shown in the first embodiment, the description thereof is omitted. Moreover, since the manufacturing method of the hollow fiber membrane module 100 is also as described in Example 1, the description thereof is omitted.

  Similarly to the case of the first embodiment, the case main body 20b according to the present embodiment is divided into two so that the bottomed cylindrical member is divided from the opening side toward the bottom side. And the second member 22b is combined. Moreover, the case main body 20b is comprised with the resin material, and the 1st member 21b and the 2nd member 22b are shape | molded separately, respectively. In the present embodiment, the first member 21b and the second member 22b have the same configuration. In the case of the present embodiment, the cylindrical portion of the case main body 20b is composed of a small-diameter portion 20D on the opening side and a tapered portion 20E that increases in diameter toward the bottom side. Also in this embodiment, a plurality of through holes 23 are provided on the side wall and the bottom of the case main body 20b. An annular groove 24 is provided in the vicinity of the opening on the inner wall surface of the case body 20b.

  Here, the case main body 20b according to the present embodiment is configured by combining the first member 21b and the second member 22b divided into two. Therefore, although the cylindrical part of the case body 20b is composed of the small diameter part 20D and the tapered part 20E, the undercut part can be eliminated when the first member 21b and the second member 22b are formed.

  Further, in the annular member 30A according to the present embodiment, a part of the inner peripheral surface is configured by a tapered surface 30A1 so as to be in close contact with the tapered portion 20E in the case main body 20b. Needless to say, the tapered surface 30A1 is provided on the adapter used in this embodiment.

  As described above, the manufacturing method described in Example 1 can also be applied to the hollow fiber membrane module 100 according to the present example. In the case of the hollow fiber membrane module 100 according to the present embodiment, the case body 20a is provided with a tapered portion 20E. Therefore, the space in which the hollow fiber membrane bundle 10 is accommodated is wider than that in the first embodiment. Therefore, compared with the case of Example 1, since a clearance gap is ensured enough between hollow fiber membranes, turbidity performance can be improved.

DESCRIPTION OF SYMBOLS 10 Hollow fiber membrane bundle 20, 20a, 20b Case main body 20A Small diameter part 20B Tapered part 20C Large diameter part 20D Small diameter part 20E Tapered part 21,21a, 21b First member 22,22a, 22b Second member 23 Through-hole 24 Annular groove 30, 30A annular member 30A1 taper surface 30a adapter 31 body part 31a mounting groove 31b annular groove part 32 tubular part 40 sealing fixing part 40a sealing material 100 hollow fiber membrane module 100a intermediate product 100b intermediate product 200 seal ring 300 tubular member 510 rotation Panel 520 Tank 530 Supply pipe 600 Cutting tool

Claims (3)

Both ends of the hollow fiber membrane bundle are attached to one of the first member and the second member divided into two so that the bottomed cylindrical member serving as the case body is divided from the opening side toward the bottom side. Attaching the hollow fiber membrane bundle in a folded state so that it faces the opening side;
Combining the other member of the first member and the second member with the one member to form the case body;
A step of fitting a bottomed cylindrical adapter having an injection part for injecting a sealing material from the opening side to the outer periphery of the case body;
Injecting a sealing material from the injection part;
After the sealing material is cured, a part of the adapter is fixed to the case body with the sealing material in a state in which the fitting portion of the adapter fitted to the case body remains. A step of opening the hollow interior of each hollow fiber membrane by cutting both ends of the hollow fiber membrane bundle,
A process for producing a hollow fiber membrane module comprising: A case having an opening on one end side;
A hollow fiber membrane bundle housed in the case in a state where both ends are bent toward the opening side,
A sealing and fixing portion that fixes both ends of the hollow fiber membrane bundle to the case on one end side of the case while opening the hollow interior of each hollow fiber membrane,
In a hollow fiber membrane module comprising:
The case is
A case body composed of a first member and a second member divided into two so that the bottomed cylindrical member is divided from the opening side toward the bottom side;
An annular member that is fitted to the outer periphery of the case body and fixes the first member and the second member;
A hollow fiber membrane module comprising:   A bottomed cylindrical adapter having an injection part for injecting a sealing material is fitted to the case body, and a part of the adapter is cut after the sealing material injected from the injection part is cured. The hollow fiber membrane module according to claim 2, wherein the annular member is obtained.