JP2021146321A - Hollow fiber membrane module and manufacturing method of hollow fiber membrane module - Google Patents

Hollow fiber membrane module and manufacturing method of hollow fiber membrane module Download PDF

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JP2021146321A
JP2021146321A JP2020051814A JP2020051814A JP2021146321A JP 2021146321 A JP2021146321 A JP 2021146321A JP 2020051814 A JP2020051814 A JP 2020051814A JP 2020051814 A JP2020051814 A JP 2020051814A JP 2021146321 A JP2021146321 A JP 2021146321A
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hollow fiber
fiber membrane
membrane module
case
sealing
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健祐 渡辺
Kensuke Watanabe
健祐 渡辺
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Nok Corp
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Abstract

To provide a hollow fiber membrane module which can improve separation performance, and a manufacturing method of the hollow fiber membrane module.SOLUTION: A hollow fiber membrane module 1 comprises a bundle 20 of hollow fiber membranes 2, a case 3 for accommodating the bundle 20 of the hollow fiber membranes 2, and a sealing part 4 for sealing one end part 31 of the case 3 while holding the hollow fiber membranes 2 by opening end parts 21 of the hollow fiber membranes 2. The hollow fiber membranes 2 have outside layers 23 and inside layers 22 tightly formed inside the outside layers 23. The sealing part 4 has a charge part 41 charged between the hollow fiber membranes 2, and an infiltration part 42 infiltrated over the inside layers 22 and the outside layers 23.SELECTED DRAWING: Figure 11

Description

本発明は、中空糸膜モジュール及び中空糸膜モジュールの製造方法に関する。 The present invention relates to a hollow fiber membrane module and a method for manufacturing a hollow fiber membrane module.

従来から、中空糸膜の束をケースに収容し、中空糸膜の端部が開口するようにケースの端部にポッディング材（封止材）を設けた中空糸膜モジュールが知られている。このような中空糸膜モジュールの製造方法として、ディッピングによりポッティング材を形成する方法が提案されている（例えば、特許文献１参照）。 Conventionally, there has been known a hollow fiber membrane module in which a bundle of hollow fiber membranes is housed in a case and a podging material (sealing material) is provided at the end of the case so that the end of the hollow fiber membrane is opened. .. As a method for manufacturing such a hollow fiber membrane module, a method for forming a potting material by dipping has been proposed (see, for example, Patent Document 1).

特許文献１に記載された中空糸膜モジュールの製造方法では、液状ポッディング材料に中空糸膜の糸束の端部をディッピングし、液状ポッディング材料を硬化させてポッティング材とした後、ポッティング材の一部及び中空糸膜の一部を切除することで、中空糸膜をポッティング材の切断面において開口させている。 In the method for manufacturing a hollow fiber membrane module described in Patent Document 1, the end of the thread bundle of the hollow fiber membrane is dipped in the liquid podding material, the liquid podding material is cured to obtain a potting material, and then the potting material is used. By cutting off a part of the hollow fiber membrane and a part of the hollow fiber membrane, the hollow fiber membrane is opened at the cut surface of the potting material.

特開２０１６−１７５００２号広報Japanese Patent Application Laid-Open No. 2016-175002 Public Relations

中空糸膜モジュールを構成する中空糸膜として、内側層が密であり外側層が疎に形成されたものが採用されることがある。このような中空糸膜では、内側層の方が外側層よりも分離性能が高く、液体は内側層の通過時に濾過されやすい。特許文献１に記載されたように中空糸膜の端部をポッティング材の切断面において開口させると、中空糸膜に対して外表面から浸透した液体が、外側層のみを通過してポッティング材の切断面にまで到達することがあった。即ち、内側層を通過しない液体が、処理後の液体として供給されてしまう可能性があった。そこで、液体が内側層によっても濾過されるようにし、分離性能を向上させることが望まれていた。 As the hollow fiber membrane constituting the hollow fiber membrane module, one in which the inner layer is dense and the outer layer is sparsely formed may be adopted. In such a hollow fiber membrane, the inner layer has higher separation performance than the outer layer, and the liquid is easily filtered when passing through the inner layer. When the end of the hollow fiber membrane is opened on the cut surface of the potting material as described in Patent Document 1, the liquid permeating from the outer surface of the hollow fiber membrane passes only through the outer layer of the potting material. It could reach the cut surface. That is, there is a possibility that the liquid that does not pass through the inner layer may be supplied as the liquid after the treatment. Therefore, it has been desired to improve the separation performance by allowing the liquid to be filtered by the inner layer as well.

本発明は、上述の課題に鑑みてなされたものであり、その目的は、分離性能を向上させることができる中空糸膜モジュール及び中空糸膜モジュールの製造方法を提供することにある。 The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a hollow fiber membrane module and a method for manufacturing a hollow fiber membrane module capable of improving separation performance.

上記目的を達成するために、本発明に係る中空糸膜モジュールは、中空糸膜の束と、前記中空糸膜の束を収容するケースと、前記中空糸膜の端部を開口させて該中空糸膜を保持しつつ前記ケースの一端部を封止する封止部と、を備えた中空糸膜モジュールであって、前記中空糸膜は、外側層と、前記外側層よりも内側に形成され且つ密に形成された内側層と、を有し、前記封止部は、前記中空糸膜同士の間に充填された充填部と、前記内側層及び前記外側層に亘って浸透した浸透部と、を有することを特徴とする。 In order to achieve the above object, the hollow fiber membrane module according to the present invention has a hollow fiber membrane bundle, a case for accommodating the hollow fiber membrane bundle, and the hollow fiber membrane by opening the end portion of the hollow fiber membrane. A hollow fiber membrane module including a sealing portion that seals one end of the case while holding the membrane, and the hollow fiber membrane is formed on an outer layer and inside the outer layer. It also has an inner layer that is densely formed, and the sealing portion includes a filling portion that is filled between the hollow fiber membranes and a permeation portion that has permeated through the inner layer and the outer layer. It is characterized by having.

本発明の一態様に係る中空糸膜モジュールにおいて、前記浸透部は、前記充填部とは材質が異なる。 In the hollow fiber membrane module according to one aspect of the present invention, the permeated portion is made of a different material from the filled portion.

一方、本発明に係る中空糸膜モジュールの製造方法は、中空糸膜の束と、前記中空糸膜の束を収容するケースと、前記中空糸膜の端部を開口させて該中空糸膜を保持しつつ前記ケースの一端部を封止する封止部と、を備えた中空糸膜モジュールの製造方法であって、内側層の方が外側層よりも密に形成された前記中空糸膜の束を前記ケースに収容し、第１の液状封止材を前記中空糸膜の端部に設けて硬化させることにより、前記中空糸膜の端部を保持しつつ前記一端部を封止する硬化部を形成する第１硬化工程と、前記硬化部の一部及び前記中空糸膜の端部を切断することにより該中空糸膜の端部を開口させる切断工程と、前記硬化部の切断面に第２の液状封止材を設ける封止工程と、前記硬化部に対して前記ケースの他端部側から加圧することにより、前記中空糸膜に通気して該中空糸膜の開口から前記第２の液状封止材を除去する除去工程と、前記第２の液状封止材を硬化させる第２硬化工程と、を含むことを特徴とする。 On the other hand, in the method for manufacturing a hollow fiber membrane module according to the present invention, a bundle of hollow fiber membranes, a case for accommodating the bundle of the hollow fiber membranes, and an end portion of the hollow fiber membrane are opened to open the hollow fiber membrane. A method for manufacturing a hollow fiber membrane module including a sealing portion for sealing one end of the case while holding the hollow fiber membrane, wherein the inner layer is formed more densely than the outer layer. The bundle is housed in the case, and the first liquid sealing material is provided at the end of the hollow fiber membrane and cured to seal the one end while holding the end of the hollow fiber membrane. A first curing step of forming a portion, a cutting step of opening a part of the cured portion and an end of the hollow fiber membrane to open the end of the hollow fiber membrane, and a cut surface of the cured portion. In the sealing step of providing the second liquid sealing material and by applying pressure to the cured portion from the other end side of the case, the hollow fiber membrane is ventilated and the first through the opening of the hollow fiber membrane. It is characterized by including a removal step of removing the liquid encapsulant of No. 2 and a second curing step of curing the second liquid encapsulant.

本発明の一態様に係る中空糸膜モジュールの製造方法において、前記除去工程における加圧中又は加圧停止後に、前記硬化部の切断面に吸着材を接触させて前記第２の液状封止材を吸着除去する。 In the method for manufacturing a hollow fiber membrane module according to one aspect of the present invention, the adsorbent is brought into contact with the cut surface of the cured portion during pressurization or after pressurization is stopped in the removal step to bring the adsorbent into contact with the second liquid encapsulant. Is adsorbed and removed.

本発明に係る中空糸膜モジュール及び中空糸膜モジュールの製造方法によれば、分離性能を向上させることができる。 According to the hollow fiber membrane module and the method for manufacturing the hollow fiber membrane module according to the present invention, the separation performance can be improved.

本発明の実施の形態に係る中空糸膜モジュールの斜視図である。It is a perspective view of the hollow fiber membrane module which concerns on embodiment of this invention. 本発明の実施の形態に係る中空糸膜モジュールの断面図である。It is sectional drawing of the hollow fiber membrane module which concerns on embodiment of this invention. 本発明の実施の形態に係る中空糸膜モジュールを拡大して示す断面図である。It is sectional drawing which shows the hollow fiber membrane module which concerns on embodiment of this invention in an enlarged manner. 比較例の中空糸膜モジュールの断面図である。It is sectional drawing of the hollow fiber membrane module of a comparative example. 本発明の実施の形態に係る中空糸膜モジュールを製造する際の切断工程後の様子を示す斜視図である。It is a perspective view which shows the state after the cutting process at the time of manufacturing the hollow fiber membrane module which concerns on embodiment of this invention. 本発明の実施の形態に係る中空糸膜モジュールを製造する際の封止工程の前段階の様子を示す斜視図である。It is a perspective view which shows the state of the pre-stage of the sealing process at the time of manufacturing the hollow fiber membrane module which concerns on embodiment of this invention. 本発明の実施の形態に係る中空糸膜モジュールを製造する際の封止工程の様子を示す斜視図である。It is a perspective view which shows the state of the sealing process at the time of manufacturing the hollow fiber membrane module which concerns on embodiment of this invention. 本発明の実施の形態に係る中空糸膜モジュールを製造する際の封止工程後の様子を示す斜視図である。It is a perspective view which shows the state after the sealing process at the time of manufacturing the hollow fiber membrane module which concerns on embodiment of this invention. 本発明の実施の形態に係る中空糸膜モジュールを製造する際の封止工程後の様子を示す断面図である。It is sectional drawing which shows the state after the sealing process at the time of manufacturing the hollow fiber membrane module which concerns on embodiment of this invention. 本発明の実施の形態に係る中空糸膜モジュールを製造する際の除去工程の様子を示す斜視図である。It is a perspective view which shows the state of the removal process at the time of manufacturing the hollow fiber membrane module which concerns on embodiment of this invention. 本発明の実施の形態に係る中空糸膜モジュールを製造する際の除去工程の様子を示す断面図である。It is sectional drawing which shows the state of the removal process at the time of manufacturing the hollow fiber membrane module which concerns on embodiment of this invention. 本発明の実施の形態に係る中空糸膜モジュールを製造する際の除去工程の様子の一例を示す断面図である。It is sectional drawing which shows an example of the state of the removal process at the time of manufacturing the hollow fiber membrane module which concerns on embodiment of this invention. 本発明の実施の形態に係る中空糸膜モジュールを製造する際に第２の液状封止材を吸着除去する前の様子を示す斜視図である。It is a perspective view which shows the state before adsorbing and removing the 2nd liquid sealing material at the time of manufacturing the hollow fiber membrane module which concerns on embodiment of this invention. 本発明の実施の形態に係る中空糸膜モジュールを製造する際に第２の液状封止材を吸着除去する様子を示す斜視図である。It is a perspective view which shows the state of adsorbing and removing the 2nd liquid sealing material at the time of manufacturing the hollow fiber membrane module which concerns on embodiment of this invention. 本発明の実施の形態に係る中空糸膜モジュールを製造する際に第２の液状封止材を吸着除去した後の様子を示す斜視図である。It is a perspective view which shows the state after adsorbing and removing the 2nd liquid sealing material at the time of manufacturing the hollow fiber membrane module which concerns on embodiment of this invention. 本発明の実施の形態に係る中空糸膜モジュールを製造する際の第２硬化工程の様子を示す断面図である。It is sectional drawing which shows the state of the 2nd hardening process at the time of manufacturing the hollow fiber membrane module which concerns on embodiment of this invention.

以下、本発明の実施の形態について図面を参照しながら説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１は、本発明の実施の形態に係る中空糸膜モジュール１の斜視図であり、図２は、本発明の実施の形態に係る中空糸膜モジュール１の断面図であり、図３は、本発明の実施の形態に係る中空糸膜モジュール１の図２におけるＡ部を拡大して示す断面図であり、図４は、比較例の中空糸膜モジュール１００の断面図であり、図５は、本発明の実施の形態に係る中空糸膜モジュール１を製造する際の切断工程後の様子を示す斜視図であり、図６は、本発明の実施の形態に係る中空糸膜モジュール１を製造する際の封止工程の前段階の様子を示す斜視図であり、図７は、本発明の実施の形態に係る中空糸膜モジュール１を製造する際の封止工程の様子を示す斜視図であり、図８は、本発明の実施の形態に係る中空糸膜モジュール１を製造する際の封止工程後の様子を示す斜視図であり、図９は、本発明の実施の形態に係る中空糸膜モジュール１を製造する際の封止工程後の様子を示す断面図であり、図１０は、本発明の実施の形態に係る中空糸膜モジュール１を製造する際の除去工程の様子を示す斜視図であり、図１１は、本発明の実施の形態に係る中空糸膜モジュール１を製造する際の除去工程の様子を示す断面図であり、図１２は、本発明の実施の形態に係る中空糸膜モジュール１を製造する際の除去工程の様子の一例を示す断面図であり、図１３は、本発明の実施の形態に係る中空糸膜モジュール１を製造する際に第２の液状封止材３００を吸着除去する前の様子を示す斜視図であり、図１４は、本発明の実施の形態に係る中空糸膜モジュール１を製造する際に第２の液状封止材３００を吸着除去する様子を示す斜視図であり、図１５は、本発明の実施の形態に係る中空糸膜モジュール１を製造する際に第２の液状封止材３００を吸着除去した後の様子を示す斜視図であり、図１６は、本発明の実施の形態に係る中空糸膜モジュール１を製造する際の第２硬化工程の様子を示す断面図である。 FIG. 1 is a perspective view of the hollow fiber membrane module 1 according to the embodiment of the present invention, FIG. 2 is a cross-sectional view of the hollow fiber membrane module 1 according to the embodiment of the present invention, and FIG. FIG. 4 is an enlarged cross-sectional view showing part A of the hollow fiber membrane module 1 according to the embodiment of the present invention in FIG. 2, FIG. 4 is a cross-sectional view of the hollow fiber membrane module 100 of a comparative example, and FIG. 5 is a cross-sectional view. FIG. 6 is a perspective view showing the state after the cutting step when manufacturing the hollow fiber membrane module 1 according to the embodiment of the present invention, and FIG. 6 is a perspective view showing the state after the cutting step. FIG. FIG. 7 is a perspective view showing a state of the pre-stage of the sealing process at the time of manufacturing, and FIG. 7 is a perspective view showing a state of the sealing process at the time of manufacturing the hollow fiber membrane module 1 according to the embodiment of the present invention. FIG. 8 is a perspective view showing the state after the sealing step when manufacturing the hollow fiber membrane module 1 according to the embodiment of the present invention, and FIG. 9 is a hollow view according to the embodiment of the present invention. It is sectional drawing which shows the state after the sealing process at the time of manufacturing a thread membrane module 1, and FIG. 10 shows the state of the removal step at the time of manufacturing a hollow fiber membrane module 1 which concerns on embodiment of this invention. It is a perspective view, FIG. 11 is a cross-sectional view which shows the state of the removal process at the time of manufacturing the hollow fiber membrane module 1 which concerns on embodiment of this invention, and FIG. FIG. 13 is a cross-sectional view showing an example of a state of the removal process when manufacturing the hollow fiber membrane module 1, and FIG. 13 is a second liquid sealing when manufacturing the hollow fiber membrane module 1 according to the embodiment of the present invention. It is a perspective view which shows the state before adhering and removing the stop material 300, and FIG. FIG. 15 is a perspective view showing a state after the second liquid sealing material 300 is adsorbed and removed when the hollow fiber membrane module 1 according to the embodiment of the present invention is manufactured. FIG. 16 is a cross-sectional view showing a state of the second curing step when manufacturing the hollow fiber membrane module 1 according to the embodiment of the present invention.

図１〜３に示すように、本発明の実施の形態に係る中空糸膜モジュール１は、中空糸膜２の束２０と、中空糸膜２の束２０を収容するケース３と、中空糸膜２の端部２１を開口させて中空糸膜２を保持しつつケース３の一端部３１を封止する封止部４と、を備える。中空糸膜２は、外側層２３と、外側層２３よりも内側に形成され且つ密に形成された内側層２２と、有する。封止部４は、中空糸膜２同士の間に充填された充填部４１と、内側層２２及び外側層２３に亘って浸透した浸透部４２と、を有する。以下、中空糸膜モジュール１について具体的に説明する。 As shown in FIGS. 1 to 3, the hollow fiber membrane module 1 according to the embodiment of the present invention includes a bundle 20 of the hollow fiber membrane 2, a case 3 accommodating the bundle 20 of the hollow fiber membrane 2, and a hollow fiber membrane. A sealing portion 4 for sealing the one end portion 31 of the case 3 while holding the hollow fiber membrane 2 by opening the end portion 21 of the case 3 is provided. The hollow fiber membrane 2 has an outer layer 23 and an inner layer 22 formed inside and densely formed from the outer layer 23. The sealing portion 4 has a filling portion 41 filled between the hollow fiber membranes 2 and a penetrating portion 42 permeating through the inner layer 22 and the outer layer 23. Hereinafter, the hollow fiber membrane module 1 will be specifically described.

中空糸膜モジュール１は、例えば、水道水等の水を濾過して飲料水として供給するために、有底筒状の容器の開口部に設けられる。この場合、中空糸膜２が容器の内部に配置されるとともに、ケース３の一端部３１が飲み口側に配置されることにより、中空糸膜２を通過した水が飲料水として供給される。即ち、中空糸膜モジュール１は、ケース３に対して他端部３２側から濾過対象の液体（以下、「対象液体」とする）が導入され、一端部３１側から濾過後の液体を導出するように構成されており、他端部３２側が導入側（上流側）となり、一端部３１側が導出側（下流側）となる。尚、中空糸膜モジュール１は、飲料水を供給するための浄水器膜モジュールを構成するものに限定されず、工業用の浄水器膜モジュールを構成してもよいし、人工透析用の膜モジュールを構成してもよい。 The hollow fiber membrane module 1 is provided at the opening of a bottomed tubular container, for example, in order to filter water such as tap water and supply it as drinking water. In this case, the hollow fiber membrane 2 is arranged inside the container, and one end 31 of the case 3 is arranged on the spout side, so that the water that has passed through the hollow fiber membrane 2 is supplied as drinking water. That is, in the hollow fiber membrane module 1, the liquid to be filtered (hereinafter referred to as “target liquid”) is introduced into the case 3 from the other end 32 side, and the filtered liquid is derived from the one end 31 side. The other end 32 side is the introduction side (upstream side), and the one end 31 side is the lead side (downstream side). The hollow fiber membrane module 1 is not limited to the one that constitutes the water purifier membrane module for supplying drinking water, and may constitute an industrial water purifier membrane module, or a membrane module for artificial dialysis. May be configured.

中空糸膜２は、内側層２２及び外側層２３を有して２層構造の筒状に形成されており、対象液体が、筒の外表面２４から内側に向かって浸透していき、筒の内部２５に到達することで濾過される。即ち、対象液体は、内側層２２及び外側層２３を通過することで濾過される。このとき、内側層２２の方が外側層よりも密に形成されており、内側層２２の方が外側層２３よりも高い分離性能を有している。中空糸膜２における分離性能とは、対象液体から所定の物質を除去する能力を意味し、密に形成されている層ほど分離性能が高くなる。内側層２２及び外側層２３は、いずれも網目構造を有しており、後述する第２の液状封止材が浸透可能となっている。尚、中空糸膜２は、３層以上によって構成されていてもよく、少なくとも２層において、内側に配置された内側層の方が外側に配置された外側層よりも密に形成されていればよい。 The hollow fiber membrane 2 has an inner layer 22 and an outer layer 23 and is formed in a cylindrical shape having a two-layer structure. It is filtered when it reaches the inside 25. That is, the target liquid is filtered by passing through the inner layer 22 and the outer layer 23. At this time, the inner layer 22 is formed more densely than the outer layer, and the inner layer 22 has higher separation performance than the outer layer 23. The separation performance of the hollow fiber membrane 2 means the ability to remove a predetermined substance from the target liquid, and the denser the layer, the higher the separation performance. Both the inner layer 22 and the outer layer 23 have a network structure, and a second liquid encapsulant, which will be described later, can penetrate into the inner layer 22 and the outer layer 23. The hollow fiber membrane 2 may be composed of three or more layers, as long as the inner layer arranged inside is formed more densely than the outer layer arranged outside in at least two layers. good.

中空糸膜２は、両方の端部２１が封止部４によって保持されるとともに全体がＵ字状に屈曲された形状を有している。即ち、中空糸膜２は、一方の端部２１が封止部４によって保持され、封止部４から遠ざかるように延び、屈曲されることで封止部４に近づくように延び、他方の端部２１が封止部４によって保持される。 The hollow fiber membrane 2 has a shape in which both end portions 21 are held by the sealing portion 4 and the entire hollow fiber membrane 2 is bent in a U shape. That is, one end 21 of the hollow fiber membrane 2 is held by the sealing portion 4, extends away from the sealing portion 4, and is bent so as to approach the sealing portion 4, and the other end. The portion 21 is held by the sealing portion 4.

ケース３は、筒状（図示の例では両端が開口した円筒状）に形成され、中空糸膜２の束２０を収容する。ケース３は、その内部に対象液体を導入可能なように開口を有するものであって、図示の例では、他端部３２全体が開口となっている。尚、ケース３の筒の側面部に開口が形成されていてもよいし、ケース３の他端部３２に底板が設けられるとともに底板に貫通孔が形成されていてもよいし、他端部３２における開口と側面部における開口とが組み合わされていてもよい。 The case 3 is formed in a tubular shape (in the illustrated example, a cylindrical shape with both ends open) and accommodates the bundle 20 of the hollow fiber membrane 2. The case 3 has an opening so that the target liquid can be introduced into the case 3, and in the illustrated example, the entire other end portion 32 is an opening. An opening may be formed in the side surface of the cylinder of the case 3, a bottom plate may be provided in the other end 32 of the case 3, and a through hole may be formed in the bottom plate, or the other end 32. The opening in the side portion and the opening in the side surface portion may be combined.

封止部４は、中空糸膜２の束２０をケース３の一端部３１に保持しつつ、且つ、通過しようとする対象液体が中空糸膜２によって濾過されるように設けられるものである。封止部４のうち他端部３２とは反対側を向いた面４Ａにおいて、中空糸膜２が開口２Ａを有する。封止部４は、複数の中空糸膜２同士の間に充填され、且つ、中空糸膜２の束２０とケース３との間に充填された充填部４１を有する。さらに、封止部４は、中空糸膜２の内側層２２及び外側層２３の両方に亘って浸透した浸透部４２を有する。浸透部４２が内側層２２及び外側層２３に浸透しているとは、内側層２２及び外側層２３の網目構造において浸透部４２の樹脂が充填されていることを意味する。充填部４１と浸透部４２とは、互いに異なる樹脂によって構成されており、例えばウレタン系やエポキシ系の樹脂が用いられればよい。 The sealing portion 4 is provided so that the bundle 20 of the hollow fiber membrane 2 is held by one end portion 31 of the case 3 and the target liquid to be passed through is filtered by the hollow fiber membrane 2. The hollow fiber membrane 2 has an opening 2A on the surface 4A of the sealing portion 4 facing the opposite side to the other end 32. The sealing portion 4 has a filling portion 41 that is filled between the plurality of hollow fiber membranes 2 and is filled between the bundle 20 of the hollow fiber membranes 2 and the case 3. Further, the sealing portion 4 has a penetrating portion 42 that has permeated through both the inner layer 22 and the outer layer 23 of the hollow fiber membrane 2. The fact that the permeation portion 42 permeates the inner layer 22 and the outer layer 23 means that the resin of the permeation portion 42 is filled in the network structure of the inner layer 22 and the outer layer 23. The filling portion 41 and the penetrating portion 42 are made of different resins, and for example, urethane-based or epoxy-based resins may be used.

充填部４１は、所定の厚さ（筒状のケース３の延在方向の寸法）を有して板状に形成され、ケース３の一端部３１を塞ぐように設けられる。充填部４１を構成する樹脂の一部が、外側層２３に多少浸透していてもよい。 The filling portion 41 has a predetermined thickness (dimensions in the extending direction of the cylindrical case 3), is formed in a plate shape, and is provided so as to close one end portion 31 of the case 3. A part of the resin constituting the filling portion 41 may penetrate into the outer layer 23 to some extent.

浸透部４２は、充填部４１よりも薄く形成されている。中空糸膜２の端部２１を一端部３１側から見た際に、端部２１のうち浸透部４２が形成された部分のみが見えるようになっている。即ち、封止部４のうち他端部３２とは反対側を向いた面４Ａにおいて、端部２１のうち浸透部４２が形成されていない部分が露出しないようになっている。また、浸透部４２が形成された部分においては、網目構造に樹脂が充填されることにより、内側層２２及び外側層２３に網目構造が観察されなくなっている。浸透部４２は、対象液体を通過させないような樹脂によって構成されている。これにより、対象液体が中空糸膜２の外側層２３のみを通過して一端部３１側に向かった際に、外側層２３の端面から液体が導出されることが浸透部４２によって規制され、内側層２２を通過しないと導出されないようになっている。 The permeation portion 42 is formed thinner than the filling portion 41. When the end portion 21 of the hollow fiber membrane 2 is viewed from the one end portion 31 side, only the portion of the end portion 21 on which the penetrating portion 42 is formed can be seen. That is, on the surface 4A of the sealing portion 4 facing the opposite side to the other end 32, the portion of the end portion 21 where the penetrating portion 42 is not formed is not exposed. Further, in the portion where the permeation portion 42 is formed, the network structure is not observed in the inner layer 22 and the outer layer 23 due to the resin filling in the network structure. The permeation portion 42 is made of a resin that does not allow the target liquid to pass through. As a result, when the target liquid passes only through the outer layer 23 of the hollow fiber membrane 2 and faces the one end 31 side, the permeation portion 42 regulates that the liquid is led out from the end face of the outer layer 23, and is inside. It is not derived unless it passes through the layer 22.

ここで、比較例の中空糸膜モジュール１００について図４を参照して説明する。比較例の中空糸膜モジュール１００は、中空糸膜１０１の束と、中空糸膜１０１の束を収容するケースと、中空糸膜１０１の端部を開口させて保持しつつケースの一端部を封止する封止部１０２と、を備えたものであって、封止部１０２が充填部のみを有しており、本発明の実施の形態の中空糸膜モジュール１のような浸透部を有していない。 Here, the hollow fiber membrane module 100 of the comparative example will be described with reference to FIG. The hollow fiber membrane module 100 of the comparative example seals one end of the case while opening and holding the bundle of the hollow fiber membrane 101, the case accommodating the bundle of the hollow fiber membrane 101, and the end portion of the hollow fiber membrane 101. It is provided with a sealing portion 102 for stopping, and the sealing portion 102 has only a filling portion and has a penetrating portion such as the hollow fiber membrane module 1 according to the embodiment of the present invention. Not.

比較例の中空糸膜モジュール１００では、中空糸膜１０１の端面１０１Ａにおいて、内側層１０１Ｂ及び外側層１０１Ｃが露出している。従って、対象液体が外側層１０１Ｃのみを通過し、外側層１０１Ｃの端面から導出されることがある。即ち、外側層１０１Ｃのみによって濾過され、内側層１０１Ｂによって濾過されていない液体が導出され、濾過後の液体として供給されることがある。 In the hollow fiber membrane module 100 of the comparative example, the inner layer 101B and the outer layer 101C are exposed on the end face 101A of the hollow fiber membrane 101. Therefore, the target liquid may pass only through the outer layer 101C and be derived from the end face of the outer layer 101C. That is, a liquid that is filtered only by the outer layer 101C and not filtered by the inner layer 101B may be derived and supplied as a liquid after filtration.

以下、図５〜１６を参照し、上記の中空糸膜モジュール１の製造方法の一例について説明する。まず、上記のように内側層２２の方が外側層２３よりも密に形成された中空糸膜２の束２０をケース３に収容し、第１の液状封止材を中空糸膜２の端部２１に設けて硬化させることにより、中空糸膜２の端部２１を保持しつつ一端部３１を封止する硬化部５を形成する（第１硬化工程）。第１硬化工程では、例えば遠心注入装置を用い、他端部３２側を内周側とするとともに一端部３１側を外周側としてケース３全体を回転させながら第１の液状封止材を注入してもよいし、ディッピングにより一端部３１に第１の液状封止材を供給してもよく、硬化部５を形成する方法は限定されない。また、第１の液状封止材は、例えば接着剤であればよい。 Hereinafter, an example of the method for manufacturing the hollow fiber membrane module 1 will be described with reference to FIGS. 5 to 16. First, as described above, the inner layer 22 accommodates the bundle 20 of the hollow fiber membrane 2 formed more densely than the outer layer 23 in the case 3, and the first liquid sealing material is the end of the hollow fiber membrane 2. By providing the portion 21 and curing the hollow fiber membrane 2, a cured portion 5 that seals the one end portion 31 while holding the end portion 21 of the hollow fiber membrane 2 is formed (first curing step). In the first curing step, for example, a centrifugal injection device is used to inject the first liquid encapsulant while rotating the entire case 3 with the other end 32 side as the inner peripheral side and the one end 31 side as the outer peripheral side. Alternatively, the first liquid sealing material may be supplied to one end portion 31 by dipping, and the method for forming the cured portion 5 is not limited. Further, the first liquid encapsulant may be, for example, an adhesive.

次に、硬化部５の一部及び中空糸膜２の一部を切断することにより中空糸膜２の端部２１を開口させる（切断工程）。即ち、第１硬化工程の直後においては、硬化部５によって中空糸膜２の端部２１が塞がれているため、硬化部５のうち端部２１を塞ぐ部分を中空糸膜２ごと切除することで、中空糸膜２に開口２Ａを形成し、端部２１において対象液体が通過できるようにする。切断工程により、図５に示すように硬化部５に切断面５１が形成される。 Next, the end portion 21 of the hollow fiber membrane 2 is opened by cutting a part of the cured portion 5 and a part of the hollow fiber membrane 2 (cutting step). That is, immediately after the first curing step, the end 21 of the hollow fiber membrane 2 is blocked by the cured portion 5, so that the portion of the cured portion 5 that closes the end 21 is cut together with the hollow fiber membrane 2. As a result, the opening 2A is formed in the hollow fiber membrane 2 so that the target liquid can pass through at the end portion 21. By the cutting step, a cut surface 51 is formed on the cured portion 5 as shown in FIG.

図６に示すように、ケース３の他端部３２に加圧用ヘッド２００を取り付ける。加圧用ヘッド２００は、後述する除去工程において通気加圧可能なものであって、ケース３における他端部３２の開口を閉塞する。尚、ケース３の側面部に開口が形成されている場合には、他の治具を用いて側面部の開口を閉塞することにより、ケース３のうち一端部３１以外の部分において気体が通過できないようにする。 As shown in FIG. 6, the pressurizing head 200 is attached to the other end 32 of the case 3. The pressurizing head 200 can be ventilated and pressurized in a removal step described later, and closes the opening of the other end 32 in the case 3. When an opening is formed in the side surface portion of the case 3, gas cannot pass through a portion of the case 3 other than the one end portion 31 by closing the opening in the side surface portion using another jig. To do so.

図７、８に示すように、硬化部５の切断面５１に第２の液状封止材３００を設ける（封止工程）。具体的には、第２の液状封止材３００を例えば有底筒状の容器に収容し、硬化部５の一端部３１側を第２の液状封止材３００に浸漬（ディッピング）した後にケース３を引き上げる。ディッピング時間は例えば５秒程度であればよい。このとき、第２の液状封止材３００は、例えば接着剤であればよく、第１の液状封止材とは材質が異なっている。封止工程によって、図９に示すように、中空糸膜２の端部２１において内側層２２及び外側層２３に第２の液状封止材３００が浸透するとともに、第２の液状封止材３００によって中空糸膜２の開口２Ａが塞がれる。尚、封止工程において、ディッピングではなく塗布によって硬化部５の切断面５１に第２の液状封止材３００を設けてもよい。第２の液状封止材３００の粘度は例えば１００ｃＰ程度であればよい。 As shown in FIGS. 7 and 8, a second liquid sealing material 300 is provided on the cut surface 51 of the cured portion 5 (sealing step). Specifically, a case in which the second liquid encapsulant 300 is housed in, for example, a bottomed cylindrical container, and one end 31 side of the cured portion 5 is immersed (dipping) in the second liquid encapsulant 300. Raise 3 The dipping time may be, for example, about 5 seconds. At this time, the second liquid encapsulant 300 may be, for example, an adhesive, and the material is different from that of the first liquid encapsulant. By the sealing step, as shown in FIG. 9, the second liquid sealing material 300 permeates the inner layer 22 and the outer layer 23 at the end portion 21 of the hollow fiber membrane 2, and the second liquid sealing material 300 The opening 2A of the hollow fiber membrane 2 is closed. In the sealing step, the second liquid sealing material 300 may be provided on the cut surface 51 of the cured portion 5 by coating instead of dipping. The viscosity of the second liquid encapsulant 300 may be, for example, about 100 cP.

図１０に示すように、硬化部５に対してケース３の他端部３２側から加圧することにより、中空糸膜２に通気して中空糸膜２の開口２Ａから第２の液状封止材３００を除去する（除去工程）。具体的には、加圧用ヘッド２００を用いてケース３内に空気等の気体を送り込んで加圧する。除去工程では、例えばケース３内の圧力が１００ｋＰａＧとなるように加圧すればよい。ケース３内の気圧が上昇した際、硬化部５のうち中空糸膜２が設けられていない部分においては気体が通過することができず、図１１に示すように気体が中空糸膜２を通過しようとすることにより、中空糸膜２の開口２Ａを塞ぐ第２の液状封止材３００が吹き飛ばされて除去される。このように、除去工程では加圧ヘッド２００を用いた通気加圧によって第２の液状封止材３００を除去する。尚、通気加圧のみでは、硬化部５の端面に付着した液状封止材３００を完全には除去することができずに図１２に示すように一部が残留する場合がある。 As shown in FIG. 10, by applying pressure to the cured portion 5 from the other end 32 side of the case 3, the hollow fiber membrane 2 is ventilated and the hollow fiber membrane 2 is ventilated from the opening 2A to the second liquid sealing material. 300 is removed (removal step). Specifically, the pressurizing head 200 is used to send a gas such as air into the case 3 to pressurize. In the removing step, for example, the pressure inside the case 3 may be increased to 100 kPaG. When the air pressure in the case 3 rises, the gas cannot pass through the portion of the hardened portion 5 where the hollow fiber membrane 2 is not provided, and the gas passes through the hollow fiber membrane 2 as shown in FIG. By trying to do so, the second liquid encapsulant 300 that closes the opening 2A of the hollow fiber membrane 2 is blown off and removed. In this way, in the removing step, the second liquid encapsulant 300 is removed by aeration pressurization using the pressurizing head 200. It should be noted that the liquid encapsulant 300 adhering to the end face of the cured portion 5 cannot be completely removed only by aeration and pressurization, and a part of the liquid encapsulant 300 may remain as shown in FIG.

図１３〜１５に示すように、上記の除去工程における加圧中に、硬化部５の切断面５１に吸着材４００を接触させて第２の液状封止材３００を吸着除去する。吸着材４００としては例えば紙ウエスを用いればよい。上記のように中空糸膜２の開口２Ａに第２の液状封止材３００の一部が残留していても、残留した第２の液状封止材３００は吸着材４００によって除去される。また、吸着材４００によって、硬化部５の端面に付着した液状封止材３００も除去される。 As shown in FIGS. 13 to 15, during the pressurization in the removal step, the adsorbent 400 is brought into contact with the cut surface 51 of the cured portion 5 to adsorb and remove the second liquid encapsulant 300. As the adsorbent 400, for example, a paper waste cloth may be used. Even if a part of the second liquid encapsulant 300 remains in the opening 2A of the hollow fiber membrane 2 as described above, the remaining second liquid encapsulant 300 is removed by the adsorbent 400. In addition, the adsorbent 400 also removes the liquid encapsulant 300 adhering to the end face of the cured portion 5.

図１６に示すように、第２の液状封止材３００を硬化させる（第２硬化工程）。具体的には、ケース３を恒温槽５００内に収容して加熱する。ケース３を恒温槽５００から取り出して適宜冷却することにより、図１〜３に示すような中空糸膜モジュール１が完成する。中空糸膜モジュール１において、切断後の硬化部５が充填部４１となり、硬化部５の切断面５１が封止部４のうち他端部３２とは反対側を向いた面４Ａとなり、内側層２２及び外側層２３に浸透した第２の液状封止材３００が浸透部４２となる。 As shown in FIG. 16, the second liquid encapsulant 300 is cured (second curing step). Specifically, the case 3 is housed in a constant temperature bath 500 and heated. The hollow fiber membrane module 1 as shown in FIGS. 1 to 3 is completed by taking out the case 3 from the constant temperature bath 500 and cooling it appropriately. In the hollow fiber membrane module 1, the cured portion 5 after cutting becomes the filling portion 41, and the cut surface 51 of the cured portion 5 becomes the surface 4A of the sealing portion 4 facing the opposite side to the other end 32, and the inner layer. The second liquid encapsulant 300 that has penetrated into 22 and the outer layer 23 becomes the permeation portion 42.

以上のような中空糸膜モジュール１の製造方法では、封止工程と除去工程との両方を実施することにより、製造した中空糸膜モジュール１において、浸透部４２を形成しつつ、中空糸膜２において対象液体を通過しやすくすることができる。即ち、封止工程のみによって浸透部を形成しようとすると、中空糸膜２の開口２Ａの一部又は全部が塞がれてしまい、対象液体が中空糸膜２を通過しにくくなる。また、封止工程を実施しない場合、対象液体が中空糸膜２を通過しやすいものの、そもそも浸透部４２を形成することができず、比較例の中空糸膜モジュール１００のように、内側層１０１Ｂを通過しない液体が処理後の液体として供給される可能性がある。 In the method for manufacturing the hollow fiber membrane module 1 as described above, by carrying out both the sealing step and the removing step, the hollow fiber membrane 2 is formed while forming the penetrating portion 42 in the manufactured hollow fiber membrane module 1. It is possible to make it easier for the target liquid to pass through. That is, if an attempt is made to form the permeation portion only by the sealing step, a part or all of the opening 2A of the hollow fiber membrane 2 is closed, and it becomes difficult for the target liquid to pass through the hollow fiber membrane 2. Further, when the sealing step is not performed, although the target liquid easily passes through the hollow fiber membrane 2, the permeation portion 42 cannot be formed in the first place, and the inner layer 101B is different from the hollow fiber membrane module 100 of the comparative example. Liquids that do not pass through may be supplied as processed liquids.

このように、本発明の実施の形態に係る中空糸膜モジュール１によれば、分離性能を向上させることができる。 As described above, according to the hollow fiber membrane module 1 according to the embodiment of the present invention, the separation performance can be improved.

また、封止部４の充填部４１と浸透部４２とで材質が異なることで、各部において目的に応じて材料を選択することができ、内側層２２及び外側層２３に浸透しやすい材料を用いて浸透部４２を形成することにより、浸透部４２によって対象液体の通過を抑制しやすくすることができる。 Further, since the material of the filling portion 41 and the penetrating portion 42 of the sealing portion 4 are different, the material can be selected according to the purpose in each portion, and a material that easily penetrates into the inner layer 22 and the outer layer 23 is used. By forming the permeation portion 42, the permeation portion 42 can easily suppress the passage of the target liquid.

また、除去工程において硬化部５の切断面５１を吸着材４００に接触させることで、通気加圧のみでは中空糸膜２の開口２Ａから液状封止材３００を完全には除去できない場合でも、吸着材４００によって第２の液状封止材３００を除去しやすくすることができる。 Further, by bringing the cut surface 51 of the cured portion 5 into contact with the adsorbent 400 in the removing step, even if the liquid encapsulant 300 cannot be completely removed from the opening 2A of the hollow fiber membrane 2 only by aeration and pressurization, the liquid encapsulant 300 is adsorbed. The material 400 can facilitate the removal of the second liquid encapsulant 300.

尚、本発明は上記の実施の形態の形態に限定されず、本発明の目的が達成できる他の構成等を含み、以下に示すような変形等も本発明に含まれる。例えば、上記の本発明の実施の形態では、封止部４の充填部４１と浸透部４２とで材質が異なるものとしたが、充填部４１と浸透部４２との材質を同じにしてもよい。このような構成によれば、封止部を形成するために使用する材料の種類を少なくし、低コスト化することができる。 The present invention is not limited to the above-described embodiment, and includes other configurations and the like that can achieve the object of the present invention, and the following modifications and the like are also included in the present invention. For example, in the above-described embodiment of the present invention, the materials of the filling portion 41 and the penetrating portion 42 of the sealing portion 4 are different, but the materials of the filling portion 41 and the penetrating portion 42 may be the same. .. According to such a configuration, the types of materials used for forming the sealing portion can be reduced, and the cost can be reduced.

また、上記の本発明の実施の形態では、除去工程において第２の液状封止材３００を除去している間に、硬化部５の切断面５１に吸着材４００を接触させるものとしたが、通気加圧の停止後に（除去工程の後に）、硬化部５の切断面５１に吸着材４００を接触させてもよい。 Further, in the above-described embodiment of the present invention, the adsorbent 400 is brought into contact with the cut surface 51 of the cured portion 5 while the second liquid encapsulant 300 is being removed in the removing step. After the aeration pressurization is stopped (after the removal step), the adsorbent 400 may be brought into contact with the cut surface 51 of the cured portion 5.

また、通気加圧によって中空糸膜２の開口２Ａから第２の液状封止材３００を充分に除去できる場合には、硬化部５の切断面５１を吸着材４００に接触させず、通気加圧のみによって第２の液状封止材３００を除去してもよい。 Further, when the second liquid sealing material 300 can be sufficiently removed from the opening 2A of the hollow fiber membrane 2 by aeration pressure, the cut surface 51 of the cured portion 5 is not brought into contact with the adsorbent 400, and the aeration pressure is applied. The second liquid encapsulant 300 may be removed only by means of the second liquid encapsulant 300.

以上、本発明の実施の形態について説明したが、本発明は上記本発明の実施の形態に係る密封装置に限定されるものではなく、本発明の概念及び特許請求の範囲に含まれるあらゆる態様を含む。また、上述した課題及び効果の少なくとも一部を奏するように、各構成を適宜選択的に組み合わせてもよい。例えば、上記実施の形態における、各構成要素の形状、材料、配置、サイズ等は、本発明の具体的使用態様によって適宜変更され得る。 Although the embodiments of the present invention have been described above, the present invention is not limited to the sealing device according to the above-described embodiments of the present invention, and all aspects included in the concept of the present invention and the scope of claims are included. include. In addition, each configuration may be selectively combined as appropriate so as to achieve at least a part of the above-mentioned problems and effects. For example, the shape, material, arrangement, size, etc. of each component in the above embodiment can be appropriately changed depending on the specific usage mode of the present invention.

１…中空糸膜モジュール、２…中空糸膜、２０…束、２１…端部、２２…内側層、２３…外側層、２４…外表面、２５…内部、２Ａ…開口、３…ケース、３１…一端部、３２…他端部、４…封止部、４１…充填部、４２…浸透部、４Ａ…面、５…硬化部、５１…切断面、２００…加圧用ヘッド、３００…第２の液状封止材、４００…吸着材、５００…恒温槽、１００…中空糸膜モジュール、１０１…中空糸膜、１０１Ａ…端面、１０１Ｂ…内側層、１０１Ｃ…外側層、１０２…封止部
1 ... Hollow fiber membrane module, 2 ... Hollow fiber membrane, 20 ... Bundle, 21 ... End, 22 ... Inner layer, 23 ... Outer layer, 24 ... Outer surface, 25 ... Inside, 2A ... Opening, 3 ... Case, 31 ... One end, 32 ... The other end, 4 ... Sealing part, 41 ... Filling part, 42 ... Penetration part, 4A ... Surface, 5 ... Hardened part, 51 ... Cut surface, 200 ... Pressurizing head, 300 ... Second Liquid sealing material, 400 ... Adsorbent, 500 ... Constant temperature bath, 100 ... Hollow fiber membrane module, 101 ... Hollow fiber membrane, 101A ... End face, 101B ... Inner layer, 101C ... Outer layer, 102 ... Sealing part

Claims (4)

中空糸膜の束と、前記中空糸膜の束を収容するケースと、前記中空糸膜の端部を開口させて該中空糸膜を保持しつつ前記ケースの一端部を封止する封止部と、を備えた中空糸膜モジュールであって、
前記中空糸膜は、外側層と、前記外側層よりも内側に形成され且つ密に形成された内側層と、を有し、
前記封止部は、前記中空糸膜同士の間に充填された充填部と、前記内側層及び前記外側層に亘って浸透した浸透部と、を有することを特徴とする中空糸膜モジュール。 A bundle of hollow fiber membranes, a case for accommodating the bundle of hollow fiber membranes, and a sealing portion that seals one end of the case while holding the hollow fiber membrane by opening the end portion of the hollow fiber membrane. A hollow fiber membrane module equipped with
The hollow fiber membrane has an outer layer and an inner layer formed inside and densely formed from the outer layer.
The hollow fiber membrane module is characterized by having a filling portion filled between the hollow fiber membranes and a permeation portion permeating through the inner layer and the outer layer. 前記浸透部は、前記充填部とは材質が異なることを特徴とする請求項１に記載の中空糸膜モジュール。 The hollow fiber membrane module according to claim 1, wherein the permeation portion is made of a material different from that of the filling portion. 中空糸膜の束と、前記中空糸膜の束を収容するケースと、前記中空糸膜の端部を開口させて該中空糸膜を保持しつつ前記ケースの一端部を封止する封止部と、を備えた中空糸膜モジュールの製造方法であって、
内側層の方が外側層よりも密に形成された前記中空糸膜の束を前記ケースに収容し、第１の液状封止材を前記中空糸膜の端部に設けて硬化させることにより、前記中空糸膜の端部を保持しつつ前記一端部を封止する硬化部を形成する第１硬化工程と、
前記硬化部の一部及び前記中空糸膜の端部を切断することにより該中空糸膜の端部を開口させる切断工程と、
前記硬化部の切断面に第２の液状封止材を設ける封止工程と、
前記硬化部に対して前記ケースの他端部側から加圧することにより、前記中空糸膜に通気して該中空糸膜の開口から前記第２の液状封止材を除去する除去工程と、
前記第２の液状封止材を硬化させる第２硬化工程と、を含むことを特徴とする
中空糸膜モジュールの製造方法。 A bundle of hollow fiber membranes, a case for accommodating the bundle of hollow fiber membranes, and a sealing portion that seals one end of the case while holding the hollow fiber membrane by opening the end portion of the hollow fiber membrane. It is a manufacturing method of a hollow fiber membrane module provided with
A bundle of the hollow fiber membranes formed in which the inner layer is denser than the outer layer is housed in the case, and a first liquid encapsulant is provided at the end of the hollow fiber membrane and cured. A first curing step of forming a cured portion that seals the one end while holding the end of the hollow fiber membrane.
A cutting step of opening the end of the hollow fiber membrane by cutting a part of the cured portion and the end of the hollow fiber membrane.
A sealing step of providing a second liquid sealing material on the cut surface of the cured portion, and
A removal step of removing the second liquid encapsulant from the opening of the hollow fiber membrane by aerating the hollow fiber membrane by applying pressure to the cured portion from the other end side of the case.
A method for manufacturing a hollow fiber membrane module, which comprises a second curing step of curing the second liquid encapsulant. 前記除去工程における加圧中又は加圧停止後に、前記硬化部の切断面に吸着材を接触させて前記第２の液状封止材を吸着除去することを特徴とする請求項３に記載の中空糸膜モジュールの製造方法。
The hollow according to claim 3, wherein the second liquid encapsulant is adsorbed and removed by bringing the adsorbent into contact with the cut surface of the cured portion during or after pressurization in the removing step. A method for manufacturing a thread membrane module.
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