JP2017100105A - External pressure type hollow fiber membrane module and method for manufacturing same - Google Patents

External pressure type hollow fiber membrane module and method for manufacturing same Download PDF

Info

Publication number
JP2017100105A
JP2017100105A JP2015237255A JP2015237255A JP2017100105A JP 2017100105 A JP2017100105 A JP 2017100105A JP 2015237255 A JP2015237255 A JP 2015237255A JP 2015237255 A JP2015237255 A JP 2015237255A JP 2017100105 A JP2017100105 A JP 2017100105A
Authority
JP
Japan
Prior art keywords
hollow fiber
fiber membrane
external pressure
housing
bundle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2015237255A
Other languages
Japanese (ja)
Other versions
JP6725238B2 (en
Inventor
尚義 森田
Hisayoshi Morita
尚義 森田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asahi Kasei Corp
Original Assignee
Asahi Kasei Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Kasei Corp filed Critical Asahi Kasei Corp
Priority to JP2015237255A priority Critical patent/JP6725238B2/en
Publication of JP2017100105A publication Critical patent/JP2017100105A/en
Application granted granted Critical
Publication of JP6725238B2 publication Critical patent/JP6725238B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an external pressure type hollow fiber membrane module which can increase capacity of a filtration flow rate while suppressing breakage of a hollow fiber membrane, and a method for manufacturing the module.SOLUTION: An external pressure type hollow fiber membrane module comprises: a hollow fiber membrane bundle in plural hollow fiber membranes, of which one end is closed and the other end is opened, are bundled; a housing 5 for accommodating the hollow fiber membrane bundle; a bonding fixation part 21 which bonds and fixes the hollow fiber membrane bundle and a housing inner wall on the opened end side of the hollow fiber membrane; a bonding fixation part 20 which bonds and fixes the hollow fiber membrane bundle and the housing inner wall on the closed end side of the hollow fiber membrane, and has an open hole 20a; and a protective member 8 which covers an outer peripheral surface of the hollow fiber membrane bundle over the whole periphery thereof in the state of being tightly adhered to the outer peripheral surface on at least one of an end area R2 of at least a prescribed length from the bonding fixation part 21 toward the bonding fixation part 20 and an end area R1 of at least a prescribed length from the bonding fixation part 20 toward the bonding fixation part 21.SELECTED DRAWING: Figure 3

Description

本発明は、外圧式中空糸膜モジュールおよびその製造方法に関するものであり、特に、純水製造装置で清澄化された原水からエンドトキシン除去を行うろ過装置に好適に用いられる外圧式中空糸膜モジュールおよびその製造方法に関するものである。   TECHNICAL FIELD The present invention relates to an external pressure type hollow fiber membrane module and a method for producing the same, and in particular, an external pressure type hollow fiber membrane module suitably used for a filtration device for removing endotoxin from raw water clarified by a pure water production device, and It relates to the manufacturing method.

近年、製薬会社において使用する用水の製造には、超ろ過法（逆浸透膜、分子量６０００以上の物質を除去できる限外ろ過膜、又はこれらの膜を組み合わせた製造システムにより水を精製する方法）が普及してきた結果、より信頼性が高く（リークする危険性の低い）、ランニングコストの安い（設計ろ過流量が高く設定できる）限外ろ過膜モジュールが求められている。   In recent years, ultrafiltration methods (reverse osmosis membranes, ultrafiltration membranes capable of removing substances having a molecular weight of 6000 or more, or methods for purifying water using a combination system of these membranes) are used to produce water used in pharmaceutical companies. As a result, there has been a demand for an ultrafiltration membrane module having higher reliability (low risk of leakage) and low running cost (high design filtration flow rate can be set).

一般に、本用途に使用される中空糸状限外ろ過膜モジュールは、外径０．１ｍｍ〜２ｍｍ、分画分子量６０００以下の中空糸膜を数百〜数千本束ねて長さ２００〜１２００ｍｍの筒状のハウジングに収納し、その両端部を樹脂でハウジング内壁に接着固定している。中空糸膜の両端部は開口しており、原水を中空糸膜の中空部に導き、中空糸膜の外表面に導かれたろ過液はハウジング側面に設けられたノズルから排出される。これは内圧クロスフローろ過方式又は内圧全ろ過方式であり、定期的にシステム全体を熱水殺菌することでシステム内の菌の繁殖を防ぎ、中空糸膜のろ過流量の低下を抑えている。   In general, the hollow-fiber ultrafiltration membrane module used in this application is a cylinder having a length of 200 to 1200 mm by bundling hundreds to thousands of hollow fiber membranes having an outer diameter of 0.1 mm to 2 mm and a molecular weight cut off of 6000 or less. The both ends are bonded and fixed to the inner wall of the housing with resin. Both ends of the hollow fiber membrane are open, the raw water is guided to the hollow portion of the hollow fiber membrane, and the filtrate guided to the outer surface of the hollow fiber membrane is discharged from a nozzle provided on the side surface of the housing. This is an internal pressure cross-flow filtration system or an internal pressure total filtration system, and periodically sterilizes the entire system with hot water to prevent the growth of bacteria in the system and suppress the decrease in the filtration flow rate of the hollow fiber membrane.

通常、中空糸膜モジュールは、比較的ろ過流量を大きく設定することが可能だが、ろ過流量を大きく設定すればするほど内圧式中空糸膜モジュールの構造上、ろ過液がハウジング側面の排出用ノズルに集中し、排出用ノズル付近の中空糸膜に吸引力が働いて破断傾向が高まり、中空糸膜が破断しやすくなるという問題があった。   Normally, the hollow fiber membrane module can be set to a relatively large filtration flow rate, but the larger the filtration flow rate, the more the filtrate flows to the discharge nozzle on the side of the housing due to the structure of the internal pressure hollow fiber membrane module. There is a problem that the suction force acts on the hollow fiber membrane in the vicinity of the discharge nozzle to increase the tendency to break, and the hollow fiber membrane is easily broken.

中空糸膜モジュールのろ過流量を上げるため、中空糸膜そのものをより細く成形して、ハウジング内への充填本数を増やしたり、中空糸膜の肉厚をより薄くすることでろ過抵抗を下げてろ過能力を向上させようとすると、中空糸膜の破断強度も低下するためより破断しやすくなる。従って、内圧クロスフローろ過方式又は内圧全ろ過方式を用いてろ過流量を上げるのは限界があった。   In order to increase the filtration flow rate of the hollow fiber membrane module, the hollow fiber membrane itself is made thinner and the number of fillings in the housing is increased, or the hollow fiber membrane is made thinner to reduce the filtration resistance and perform filtration. When trying to improve the capacity, the breaking strength of the hollow fiber membrane also decreases, so that it becomes easier to break. Therefore, there is a limit to increasing the filtration flow rate using the internal pressure cross flow filtration system or the internal pressure total filtration system.

また、中空糸膜モジュールのろ過流量を上げるため、特許文献１に記載のような外圧式中空糸膜モジュールを用いることが考えられる。   Moreover, in order to raise the filtration flow rate of a hollow fiber membrane module, it is possible to use an external pressure type hollow fiber membrane module as described in Patent Document 1.

国際公開第２００５／０３０３７５号International Publication No. 2005/030375

しかしながら、特許文献１に記載のような外圧式の中空糸膜モジュールを用いた場合、高いろ過流量で運転を試みると、ハウジング内への原水の流入によって中空糸膜の両端部近傍が振動し、これにより中空糸膜が破断するという問題がある。   However, when using an external pressure type hollow fiber membrane module as described in Patent Document 1, when trying to operate at a high filtration flow rate, the vicinities of both ends of the hollow fiber membrane vibrate due to the inflow of raw water into the housing, This causes a problem that the hollow fiber membrane is broken.

本発明は、このような課題に鑑みてなされたものであり、中空糸膜の破断を抑えつつ、ろ過流量の増能力化を可能とする外圧式中空糸膜モジュール及びその製造方法を提供することを目的とするものである。   The present invention has been made in view of such a problem, and provides an external pressure type hollow fiber membrane module capable of increasing the filtration flow rate while suppressing breakage of the hollow fiber membrane, and a method for producing the same. It is intended.

本発明者は、上記課題を解決するため、比較的低い破断強度の中空糸膜を用いて製作しても破断発生率を劇的に抑制可能な外圧式中空糸膜ろ過モジュールの構造を見出し、本発明に至った。すなわち、本発明は下記のとおりである。   In order to solve the above problems, the present inventor has found a structure of an external pressure type hollow fiber membrane filtration module capable of dramatically suppressing the rate of breakage even when manufactured using a hollow fiber membrane having a relatively low breaking strength, The present invention has been reached. That is, the present invention is as follows.

本発明の外圧式中空糸膜モジュールは、一方の端部が閉塞され他方の端部が開口された複数の中空糸膜を束ねた中空糸膜束と、側面に少なくとも１つのノズルを有した筒状体であり、中空糸膜の閉塞された端部および中空糸膜の開口された端部がそれぞれ筒状体の長手方向の両端側に向くように、中空糸膜束を収容するハウジングと、中空糸膜の開口された端部側において、中空糸膜同士、および中空糸膜束とハウジング内壁とを接着固定した第１の接着固定部と、中空糸膜の閉塞された端部側において、中空糸膜同士、および中空糸膜束とハウジング内壁とを接着固定し、中空糸膜束の外周においてハウジングの長手方向に少なくとも１つの平行な貫通孔を有する第２の接着固定部と、第１の接着固定部から第２の接着固定部に向かって少なくとも所定の長さの端部領域、および第２の接着固定部から第１の接着固定部に向かって少なくとも所定の長さの端部領域の少なくとも一方において、中空糸膜束の外周面に密着した状態でその外周面を全周囲に亘って覆う保護部材とを備えたことを特徴とする。   The external pressure hollow fiber membrane module of the present invention includes a hollow fiber membrane bundle obtained by bundling a plurality of hollow fiber membranes having one end closed and the other end opened, and a tube having at least one nozzle on a side surface. A housing for housing a bundle of hollow fiber membranes such that the closed end of the hollow fiber membrane and the open end of the hollow fiber membrane are respectively directed to both ends in the longitudinal direction of the tubular body, On the opened end side of the hollow fiber membrane, the hollow fiber membranes, the first adhesive fixing part that bonds and fixes the hollow fiber membrane bundle and the housing inner wall, and the closed end side of the hollow fiber membrane, A second adhesive fixing portion that bonds and fixes the hollow fiber membranes and the hollow fiber membrane bundle to the inner wall of the housing, and has at least one parallel through hole in the longitudinal direction of the housing on the outer periphery of the hollow fiber membrane bundle; From the adhesive fixing part to the second adhesive fixing part, At least one of an end region of a predetermined length and at least one end region of a predetermined length from the second adhesive fixing portion toward the first adhesive fixing portion, the outer peripheral surface of the hollow fiber membrane bundle And a protective member that covers the entire outer periphery of the outer peripheral surface in a close contact state.

また、上記本発明の外圧式中空糸膜モジュールにおいては、保護部材の内周の長さをL、中空糸膜の外径をd、保護部材に接触している中空糸膜の本数をmとしたとき、md／Lは０．９５以上であることが好ましい。   In the external pressure hollow fiber membrane module of the present invention, the length of the inner periphery of the protective member is L, the outer diameter of the hollow fiber membrane is d, and the number of hollow fiber membranes in contact with the protective member is m. Md / L is preferably 0.95 or more.

また、上記本発明の外圧式中空糸膜モジュールにおいて、貫通孔は、中空糸膜束の外周面に隣接するように配置されていることが好ましい。   Moreover, in the external pressure type hollow fiber membrane module of the present invention, it is preferable that the through hole is disposed adjacent to the outer peripheral surface of the hollow fiber membrane bundle.

また、上記本発明の外圧式中空糸膜モジュールにおいては、貫通孔の開口面積の和をA、開口された側の中空糸膜の中空部の総開口面積の和をBとしたとき、A／Bは０．０５以上１以下であることが好ましい。   In the external pressure hollow fiber membrane module of the present invention, when the sum of the opening areas of the through holes is A and the sum of the total opening areas of the hollow portions of the hollow fiber membranes on the opened side is B, A / B is preferably 0.05 or more and 1 or less.

また、上記本発明の外圧式中空糸膜モジュールにおいて、保護部材は、中空糸膜束の閉塞された側の端部領域および中空糸膜束の開口された側の端部領域の少なくとも一方にのみ設けることができる。   Further, in the external pressure hollow fiber membrane module of the present invention, the protective member is provided only in at least one of the end region on the closed side of the hollow fiber membrane bundle and the end region on the open side of the hollow fiber membrane bundle. Can be provided.

また、上記本発明の外圧式中空糸膜モジュールにおいて、上記少なくとも１つのノズルは、ハウジングの少なくとも一方の端の近傍に形成され、保護部材は、ノズルが形成された一端部側の端部領域に設けることができる。   In the external pressure hollow fiber membrane module of the present invention, the at least one nozzle is formed in the vicinity of at least one end of the housing, and the protective member is provided in an end region on one end side where the nozzle is formed. Can be provided.

また、上記本発明の外圧式中空糸膜モジュールにおいて、保護部材は、ノズルのハウジング内側面側の開口よりもハウジングの長手方向の中央位置側に延伸されて設けることが好ましい。   In the external pressure hollow fiber membrane module of the present invention, the protective member is preferably provided so as to extend toward the center position in the longitudinal direction of the housing from the opening on the inner surface side of the housing of the nozzle.

また、上記本発明の外圧式中空糸膜モジュールにおいては、保護部材として、ネット状の部材を筒状に形成したものを用いることができる。   Moreover, in the external pressure type hollow fiber membrane module of the present invention, as the protective member, a net-like member formed in a cylindrical shape can be used.

また、上記本発明の外圧式中空糸膜モジュールにおいては、保護部材として、シート状の部材を筒状に形成したものを用いることができる。   Moreover, in the external pressure type hollow fiber membrane module of the present invention, a sheet-like member formed in a cylindrical shape can be used as the protective member.

本発明の外圧式中空糸膜モジュールの製造方法は、上記本発明の外圧式中空糸膜モジュールの製造方法であって、保護部材で包んだ中空糸膜束をハウジング内に挿入した後、保護部材で包まれた中空糸膜束の外周面の外側に複数の柱状部材を挿入することによって中空糸膜束の外周面と保護部材とを密着させた状態とすることを特徴とする。   The manufacturing method of the external pressure type hollow fiber membrane module of the present invention is the manufacturing method of the external pressure type hollow fiber membrane module of the present invention described above, and after the hollow fiber membrane bundle wrapped with the protective member is inserted into the housing, the protective member A plurality of columnar members are inserted outside the outer peripheral surface of the hollow fiber membrane bundle wrapped with the outer peripheral surface of the hollow fiber membrane bundle so that the protective member is brought into close contact therewith.

また、上記本発明の外圧式中空糸膜モジュールの製造方法においては、中空糸膜束の外周面と保護部材とを密着させた状態とした後、ハウジング内にポッティング材を注入することによって第２の接着固定部を形成し、第２の接着固定部が形成された後、柱状部材を取り除くことによって貫通孔を形成することができる。   Moreover, in the manufacturing method of the external pressure type | formula hollow fiber membrane module of the said invention, after making the outer peripheral surface of a hollow fiber membrane bundle and the protection member closely_contact | adhere, it is 2nd by inject | pouring a potting material in a housing. After forming the second adhesive fixing portion and forming the second adhesive fixing portion, the through hole can be formed by removing the columnar member.

また、上記本発明の外圧式中空糸膜モジュールの製造方法においては、柱状部材の長手方向に直交する方向の断面形状が、円形または楕円形であることが好ましい。   Moreover, in the manufacturing method of the external pressure type | formula hollow fiber membrane module of the said invention, it is preferable that the cross-sectional shape of the direction orthogonal to the longitudinal direction of a columnar member is circular or an ellipse.

また、上記本発明の外圧式中空糸膜モジュールの製造方法においては、柱状部材の先端部分がテーパー形状であることが好ましい。   Moreover, in the manufacturing method of the external pressure type | formula hollow fiber membrane module of the said invention, it is preferable that the front-end | tip part of a columnar member is a taper shape.

本発明の外圧式中空糸膜モジュールによれば、中空糸膜束の一方の端部に形成された第１の接着固定部から他方の端部に形成された第２の接着固定部に向かって少なくとも所定の長さの端部領域、および第２の接着固定部から第１の接着固定部に向かって少なくとも所定の長さの端部領域の少なくとも一方において、中空糸膜束の外周面に密着した状態でその外周面を全周囲に亘って覆う保護部材を設ける。これにより、高いろ過流量で長期間運転しても、接着固定部の境界近傍での中空糸膜の振動などを抑制することができ、中空糸膜の破断を抑制しつつ、ろ過流量の増能力化が可能となる。   According to the external pressure type hollow fiber membrane module of the present invention, from the first adhesive fixing part formed at one end of the hollow fiber membrane bundle toward the second adhesive fixing part formed at the other end. At least one end region of a predetermined length and at least one end region of a predetermined length from the second adhesive fixing portion toward the first adhesive fixing portion are in close contact with the outer peripheral surface of the hollow fiber membrane bundle In this state, a protective member that covers the entire outer periphery of the outer peripheral surface is provided. As a result, even if the filter is operated for a long time at a high filtration flow rate, vibration of the hollow fiber membrane in the vicinity of the boundary of the adhesive fixing part can be suppressed, and the ability to increase the filtration flow rate while suppressing breakage of the hollow fiber membrane. Can be realized.

本発明の中空糸膜モジュールの一実施形態の概略構成を示す図The figure which shows schematic structure of one Embodiment of the hollow fiber membrane module of this invention. 図１に示す中空糸膜モジュールのＣ−Ｄ線断面図CD sectional view of the hollow fiber membrane module shown in FIG. 本発明の中空糸膜モジュールの一実施形態における保護部材の概略構成を示す図The figure which shows schematic structure of the protection member in one Embodiment of the hollow fiber membrane module of this invention. 図１に示す中空糸膜モジュールのＡ−Ｂ線断面図Sectional view taken along line AB of the hollow fiber membrane module shown in FIG.

以下、本発明の中空糸膜モジュールの一実施形態について図面を参照しながら説明する。本実施形態の中空糸膜モジュールは、上下水道、食品工業、一般工業、医療、理化学といった様々な分野で利用されるものであり、特に、医薬食品業界の無菌水製造装置における最終ろ過膜モジュールとして好適に利用されるものである。図１は、本実施形態の中空糸膜モジュールの概略構成を示す図である。なお、図１においては、その上下方向を矢印で示している。また、以下、図１に示す上下方向を中空糸膜モジュール１の上下方向として説明する。   Hereinafter, an embodiment of the hollow fiber membrane module of the present invention will be described with reference to the drawings. The hollow fiber membrane module of the present embodiment is used in various fields such as water and sewage, food industry, general industry, medicine, physics and chemistry, and particularly as a final filtration membrane module in a sterile water production apparatus in the pharmaceutical food industry. It is preferably used. FIG. 1 is a diagram showing a schematic configuration of the hollow fiber membrane module of the present embodiment. In FIG. 1, the vertical direction is indicated by arrows. Hereinafter, the vertical direction shown in FIG. 1 will be described as the vertical direction of the hollow fiber membrane module 1.

図１に示されるように、本実施形態の中空糸膜モジュール１は、複数の中空糸膜２が束ねられた中空糸膜束３と、中空糸膜束３を収容する筒状のハウジング５とを備えるものである。なお、図１においては、ハウジング５および後述するキャップ１０，１１については、手前半分を取り除いた断面図を示している。   As shown in FIG. 1, the hollow fiber membrane module 1 of the present embodiment includes a hollow fiber membrane bundle 3 in which a plurality of hollow fiber membranes 2 are bundled, and a cylindrical housing 5 that houses the hollow fiber membrane bundle 3. Is provided. In FIG. 1, the housing 5 and caps 10 and 11 to be described later are cross-sectional views with the front half removed.

中空糸膜２としては、逆浸透膜、ナノ濾過膜、限外ろ過膜、及び精密ろ過膜を用いることが出来る。中空糸膜の素材は特に限定されず、ポリスルホン、ポリエーテルスルホン、ポリアクリロニトリル、ポリイミド、ポリエーテルイミド、ポリアミド、ポリエーテルケトン、ポリエーテルエーテルケトン、ポリエチレン、ポリプロピレン、ポリ（４−メチルペンテン）、エチレン−ビニルアルコール共重合体、セルロース、酢酸セルロース、ポリフッ化ビニリデン、エチレン−テトラフルオロエチレン共重合体、およびポリテトラフルオロエチレン等が挙げられ、また、これらの複合素材も使用できる。   As the hollow fiber membrane 2, a reverse osmosis membrane, a nanofiltration membrane, an ultrafiltration membrane, and a microfiltration membrane can be used. The material of the hollow fiber membrane is not particularly limited. Polysulfone, polyethersulfone, polyacrylonitrile, polyimide, polyetherimide, polyamide, polyetherketone, polyetheretherketone, polyethylene, polypropylene, poly (4-methylpentene), ethylene -Vinyl alcohol copolymer, cellulose, cellulose acetate, polyvinylidene fluoride, ethylene-tetrafluoroethylene copolymer, polytetrafluoroethylene, and the like, and these composite materials can also be used.

また、中空糸膜の形状としては、内径が５０μm〜３０００μmであることが好ましく、より好ましくは５００〜２０００μmである。また、内径/外径比が０．３〜０．８のものが好適に使用される。   Moreover, as a shape of a hollow fiber membrane, it is preferable that an internal diameter is 50 micrometers-3000 micrometers, More preferably, it is 500-2000 micrometers. Further, those having an inner diameter / outer diameter ratio of 0.3 to 0.8 are preferably used.

ハウジング５の両端開口には、配管が接続される管路１０ａ，１１ａが形成された配管接続用のキャップ１０，１１がそれぞれ設けられており、配管接続用のキャップ１０，１１はクランプ１３によってハウジング５に固定装着されている。キャップ１０，１１のハウジング５側の端面とハウジング５のキャップ１０，１１側の端面には環状の溝が形成されており、この溝によってサニタリーガスケット１２が挟まれている。このサニタリーガスケット１２によりハウジング両端とキャップ１０，１１の間がシールされる。   Piping connection caps 10 and 11 each having pipes 10 a and 11 a to which piping is connected are provided at both ends of the housing 5, and the piping connection caps 10 and 11 are clamped by the housing 13. 5 is fixedly attached. An annular groove is formed on the end surface of the caps 10 and 11 on the housing 5 side and the end surface of the housing 5 on the caps 10 and 11 side, and the sanitary gasket 12 is sandwiched between the grooves. The sanitary gasket 12 seals between the housing ends and the caps 10 and 11.

ハウジング５は、第１ノズル５１ａと一体成型された第１筒状部材５１と、第２ノズル５２ａと一体成型された第２筒状部材５２と、第１筒状部材５１と第２筒状部材５２との間に配される直管状の第３筒状部材５３とが互いに接合されて構成されている。第１ノズル５１ａと第２ノズル５２ａとは、それぞれハウジング５の端部の側部に設けられ、ハウジング５の長手方向に直交する方向に突き出すように設けられている。第２ノズル５２ａは、外圧ろ過処理の過程において濃縮水が排出されるノズルである。第１ノズル５１ａは、本実施形態の中空糸膜モジュール１では特に使用されないため、その開口は封止されている。   The housing 5 includes a first tubular member 51 formed integrally with the first nozzle 51a, a second tubular member 52 formed integrally with the second nozzle 52a, and the first tubular member 51 and the second tubular member. A straight tubular third tubular member 53 disposed between the first and second members 52 is joined to each other. The first nozzle 51 a and the second nozzle 52 a are provided on the side portions of the end portion of the housing 5, respectively, so as to protrude in a direction perpendicular to the longitudinal direction of the housing 5. The second nozzle 52a is a nozzle that discharges concentrated water in the course of external pressure filtration. Since the first nozzle 51a is not particularly used in the hollow fiber membrane module 1 of the present embodiment, its opening is sealed.

本実施形態の中空糸膜モジュール１は、その長手方向が鉛直方向となるように立設され、第１ノズル５１ａが鉛直方向下側に配置され、第２ノズル５２ａが鉛直方向上側に配置されるように設置される。   The hollow fiber membrane module 1 of the present embodiment is erected so that the longitudinal direction thereof is the vertical direction, the first nozzle 51a is disposed on the lower side in the vertical direction, and the second nozzle 52a is disposed on the upper side in the vertical direction. Installed.

また、中空糸膜束３の両端部には、図１に示すように、第１整流筒６および第２整流筒７がそれぞれ装着されている。   Moreover, as shown in FIG. 1, the 1st rectification | straightening cylinder 6 and the 2nd rectification | straightening cylinder 7 are each attached to the both ends of the hollow fiber membrane bundle 3. As shown in FIG.

第１整流筒６および第２整流筒７は筒状に形成されたものであり、第１整流筒６は、下側の第１ノズル５１ａのハウジング５の内側面側の開口と中空糸膜束３との間に設けられ、第２整流筒７は、上側の第２ノズル５２ａのハウジング５の内側面側の開口と中空糸膜束３との間に設けられ、それぞれ中空糸膜束３の外周を囲むように設けられている。   The first rectifying cylinder 6 and the second rectifying cylinder 7 are formed in a cylindrical shape, and the first rectifying cylinder 6 includes an opening on the inner surface side of the housing 5 of the lower first nozzle 51a and a hollow fiber membrane bundle. 3 and the second rectifying cylinder 7 is provided between the opening on the inner surface side of the housing 5 of the upper second nozzle 52a and the hollow fiber membrane bundle 3, respectively. It is provided so as to surround the outer periphery.

第１整流筒６および第２整流筒７は、第１ノズル５１ａおよび第２ノズル５２ａの近傍において、中空糸膜束３とハウジング５の内壁との間隔を保持するために設けられたものである。   The first rectifying cylinder 6 and the second rectifying cylinder 7 are provided in the vicinity of the first nozzle 51 a and the second nozzle 52 a in order to maintain a space between the hollow fiber membrane bundle 3 and the inner wall of the housing 5. .

第１整流筒６および第２整流筒７には、図１に示すように、それぞれ複数の貫通穴３０が設けられている。第１整流筒６の貫通穴３０は、第１ノズル５１ａのハウジング５の内側面側の開口に対向する領域以外の領域に形成し、開口に対向する領域には形成しないようにすることが望ましい。また、第２整流筒７の貫通穴３０は、第２ノズル５２ａのハウジング５の内側面側の開口に対向する領域以外に領域に形成し、開口に対向する領域には形成しないようにすることが望ましい。   As shown in FIG. 1, the first rectifying cylinder 6 and the second rectifying cylinder 7 are each provided with a plurality of through holes 30. The through hole 30 of the first rectifying cylinder 6 is desirably formed in a region other than the region facing the opening on the inner surface side of the housing 5 of the first nozzle 51a and not formed in the region facing the opening. . Further, the through hole 30 of the second rectifying cylinder 7 is formed in a region other than the region facing the opening on the inner surface side of the housing 5 of the second nozzle 52a, and is not formed in the region facing the opening. Is desirable.

第１整流筒６はフランジ６ａを備えており、そのフランジ６ａを第１筒状部材５１と第３筒状部材５３の接合部分で挟むことによって、第１整流筒６が位置決めされる。第１整流筒６の下側端部は、後述する接着固定部２０（本発明の第２の接着固定部に相当する）内で接着固定される。同様に、第２整流筒７はフランジ７ａを備えており、そのフランジ７ａを第２筒状部材５２と第３筒状部材５３の接合部分で挟むことによって、第２整流筒７が位置決めされる。第１整流筒７の上側端部は、後述する接着固定部２１（本発明の第１の接着固定部に相当する）内で接着固定される。   The first rectifying cylinder 6 is provided with a flange 6 a, and the first rectifying cylinder 6 is positioned by sandwiching the flange 6 a between the joint portions of the first cylindrical member 51 and the third cylindrical member 53. The lower end portion of the first rectifying cylinder 6 is adhesively fixed in an adhesive fixing portion 20 (corresponding to a second adhesive fixing portion of the present invention) described later. Similarly, the second rectifying cylinder 7 includes a flange 7a, and the second rectifying cylinder 7 is positioned by sandwiching the flange 7a between the joint portions of the second cylindrical member 52 and the third cylindrical member 53. . The upper end portion of the first rectifying cylinder 7 is adhesively fixed in an adhesive fixing portion 21 (corresponding to the first adhesive fixing portion of the present invention) described later.

中空糸膜束３の両端部には、各中空糸膜２同士および中空糸膜束３とハウジング５の内壁とをポッティング材によって接着固定する接着固定部２０，２１が形成されている。ハウジング５の内壁には環状凹凸部５ａが形成されており、この環状凹凸部５ａの溝にポッティング材が流れ込むことによって、接着固定部２０，２１の側面に環状凹凸構造が形成される。このようにハウジング５の内壁に環状凹凸部５ａを形成することによって、ハウジング５と接着固定部２０，２１との接着面積を広くすることができ、より高い接着力を得ることができる。   At both ends of the hollow fiber membrane bundle 3, adhesive fixing portions 20 and 21 are formed for bonding and fixing the hollow fiber membranes 2 and the hollow fiber membrane bundle 3 and the inner wall of the housing 5 with a potting material. An annular concavo-convex portion 5a is formed on the inner wall of the housing 5, and a potting material flows into the groove of the annular concavo-convex portion 5a, whereby an annular concavo-convex structure is formed on the side surfaces of the adhesive fixing portions 20, 21. By forming the annular concavo-convex portion 5a on the inner wall of the housing 5 in this manner, the bonding area between the housing 5 and the adhesive fixing portions 20 and 21 can be increased, and higher adhesive force can be obtained.

ポッティング材としては、エポキシ樹脂、ビニルエステル樹脂、ウレタン樹脂、不飽和ポリエステル樹脂、オレフィン系ポリマー、シリコン樹脂、およびフッ素含有樹脂等の高分子材料が好ましく、これらの高分子材料のいずれかでもよいし、複数の高分子材料を組み合わせて用いるようにしてもよい。ウレタン樹脂は比較的短時間で反応が完結するので特に好ましい。また、これらのポッティング材で構成された接着固定部２０，２１は、ろ過時に加圧によって生ずる一次側と二次側の差圧に耐え得る耐圧性を有することが必要であり、そのためには適度な硬さを有していることが望ましい。一方、物理洗浄時の流体の流れによる中空糸膜２の破断をより長期間確実に防止するために、適度な柔らかさを有したポッティング材を使用することが望ましい。従って、使用上必要充分な耐圧性を付与し、かつ、確実に膜破断を防止するためには、使用温度範囲で硬度７０Ｄ〜５０Ａの特性を有するポッティング材を使用することが好ましい。尚、ここで言う硬度は、ショア硬度計を実質的に平滑な面を有する資料面に押し当てた時に、１０秒後に示した値をいう。この値が７０Ｄ超えると上記の膜破断が起こる場合があり、また、５０Ａ未満では耐圧性が不足する場合がある。   The potting material is preferably a polymer material such as an epoxy resin, vinyl ester resin, urethane resin, unsaturated polyester resin, olefin polymer, silicon resin, and fluorine-containing resin, and any of these polymer materials may be used. A plurality of polymer materials may be used in combination. A urethane resin is particularly preferable because the reaction is completed in a relatively short time. In addition, the adhesive fixing parts 20 and 21 made of these potting materials are required to have a pressure resistance that can withstand the differential pressure between the primary side and the secondary side caused by pressurization during filtration. It is desirable to have a high hardness. On the other hand, in order to prevent the hollow fiber membrane 2 from being broken due to the flow of fluid during physical cleaning for a longer period of time, it is desirable to use a potting material having appropriate softness. Therefore, it is preferable to use a potting material having a hardness of 70D to 50A in the operating temperature range in order to provide sufficient pressure resistance necessary for use and to reliably prevent film breakage. The hardness referred to here is the value shown after 10 seconds when the Shore hardness tester is pressed against a material surface having a substantially smooth surface. When this value exceeds 70 D, the above-mentioned film breakage may occur, and when it is less than 50 A, pressure resistance may be insufficient.

中空糸膜束３の両端部に形成された接着固定部２０と接着固定部２１との間の中空糸膜２の外側には被処理液が流れ込む領域５ｂ（以下、外側領域という）が形成される。   A region 5b (hereinafter referred to as an outer region) into which the liquid to be treated flows is formed outside the hollow fiber membrane 2 between the adhesive fixing portion 20 and the adhesive fixing portion 21 formed at both ends of the hollow fiber membrane bundle 3. The

また、図１に示すように、中空糸膜モジュール１を鉛直方向に立設した場合に下側に位置する接着固定部２０には、複数の貫通孔２０ａが形成されている。図２は、図１に示す中空糸膜モジュール１のＣ−Ｄ線断面図である。   Moreover, as shown in FIG. 1, when the hollow fiber membrane module 1 is erected in the vertical direction, a plurality of through holes 20a are formed in the adhesive fixing portion 20 located on the lower side. FIG. 2 is a cross-sectional view taken along line CD of the hollow fiber membrane module 1 shown in FIG.

貫通孔２０ａは、ハウジング５の長手方向に平行に形成されており、上述した外側領域５ｂと外側領域５ｂとは接着固定部２０を挟んで反対側の外部領域５ｃとを連通させる孔である。本実施形態においては、複数の貫通孔２０ａは、図２に示すように、後述する保護部材８とハウジング５の内壁との間の接着固定部２０内に設けられ、中空糸膜束３の外周面に隣接するように配置されている。   The through hole 20a is formed in parallel to the longitudinal direction of the housing 5, and the outer region 5b and the outer region 5b described above are holes that allow the opposite outer region 5c to communicate with the adhesive fixing part 20 therebetween. In the present embodiment, as shown in FIG. 2, the plurality of through holes 20 a are provided in an adhesive fixing portion 20 between a protection member 8 (described later) and the inner wall of the housing 5. It is arranged adjacent to the surface.

そして、各中空糸膜２の貫通孔２０ａが設けられた側の中空部は閉塞されており、各中空糸膜２の貫通孔２０ａが形成された側とは反対側の中空部は開口されている。ろ過処理が行われる際には、キャップ１１の管路１１ａから被処理水が流入し、その被処理水が貫通孔２０ａを通過して外側領域５ｂに供給される。そして、外側領域５ｂに供給された被処理液が各中空糸膜２の外表面から染み込み、各中空糸膜２の中空部を通過したろ過液が、キャップ１０の管路１０ａから流出され、濃縮水が第２ノズル５２ａから流出される。   And the hollow part of the side by which the through-hole 20a of each hollow fiber membrane 2 was provided is obstruct | occluded, and the hollow part on the opposite side to the side in which the through-hole 20a of each hollow fiber membrane 2 was formed is opened. Yes. When the filtration process is performed, the water to be treated flows from the pipe 11a of the cap 11, and the water to be treated passes through the through hole 20a and is supplied to the outer region 5b. And the to-be-processed liquid supplied to the outer side area | region 5b permeates from the outer surface of each hollow fiber membrane 2, and the filtrate which passed the hollow part of each hollow fiber membrane 2 is flowed out from the pipe line 10a of the cap 10, and is concentrated. Water flows out from the second nozzle 52a.

また、中空糸膜モジュール１は、中空糸膜束３の外周面を包みこむように設けられた筒状の保護部材８を備えている。図３は、ハウジング５内に設けられた保護部材８の外観を示すものである。なお、図３においては、図１に示す中空糸膜束３および第１および第２整流筒６，７は図示省略している。また、図１においては、保護部材８を図示省略している。   The hollow fiber membrane module 1 includes a cylindrical protective member 8 provided so as to wrap around the outer peripheral surface of the hollow fiber membrane bundle 3. FIG. 3 shows the appearance of the protective member 8 provided in the housing 5. In FIG. 3, the hollow fiber membrane bundle 3 and the first and second rectifying cylinders 6 and 7 shown in FIG. 1 are not shown. Further, in FIG. 1, the protective member 8 is not shown.

図３に示すように、本実施形態においては、中空糸膜束３の外周面の略全体を包み込むように保護部材８が設けられている。本実施形態で用いられる保護部材８は、図３に示すようなネット状の部材を筒状に形成したものであり、可撓性を有するものである。ネット状の保護部材８の材質としては、ＰＦＡ（テトラフルオロエチレン・パーフルオロアルキルビニルエーテル共重合体）、ＦＥＰ（テトラフルオロエチレン・ヘキサフルオロプロピレン共重合体(４．６フッ化)）、ＥＴＦＥ（テトラフルオロエチレン・エチレン共重合体）、ＰＴＦＥ（ポリテトラフルオロエチレン(４フッ化)）、ポリスルホン等の耐熱性を有する材質を用いることが望ましい。保護部材８の両端は、それぞれ接着固定部２０，２１内に位置し、接着固定部２０，２１によって固定されている。   As shown in FIG. 3, in this embodiment, the protective member 8 is provided so that the substantially whole outer peripheral surface of the hollow fiber membrane bundle 3 may be wrapped. The protection member 8 used in the present embodiment is formed by forming a net-like member as shown in FIG. 3 into a cylindrical shape, and has flexibility. The material of the net-like protective member 8 is PFA (tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer), FEP (tetrafluoroethylene / hexafluoropropylene copolymer (4.6 fluoride)), ETFE (tetrafluoroethylene). It is desirable to use a heat-resistant material such as fluoroethylene / ethylene copolymer), PTFE (polytetrafluoroethylene (tetrafluoride)), polysulfone or the like. Both ends of the protection member 8 are located in the adhesive fixing portions 20 and 21, respectively, and are fixed by the adhesive fixing portions 20 and 21.

そして、保護部材８は、中空糸膜束３の少なくとも両端部において、中空糸膜束３の外周面に密着した状態で設けられている。上記両端部とは、具体的には、貫通孔２０ａが形成された側の接着固定部２０と外側領域５ｂとの境界２０ｂとその境界２０ｂから外側領域５ｂ側に所定の長さＬ１だけ延伸した領域とを含む第１端部領域Ｒ１と、第２ノズル５２ａが形成された一端部側の接着固定部２１と外側領域５ｂとの境界２１ｂとその境界２１ｂから外側領域５ｂ側に所定の長さＬ２だけ延伸した領域とを含む第２端部領域Ｒ２である。   And the protection member 8 is provided in the state closely_contact | adhered to the outer peripheral surface of the hollow fiber membrane bundle 3 in the both ends of the hollow fiber membrane bundle 3 at least. Specifically, the both end portions are extended by a predetermined length L1 from the boundary 20b between the adhesive fixing portion 20 on the side where the through hole 20a is formed and the outer region 5b and from the boundary 20b to the outer region 5b side. A first end region R1 including the region, a boundary 21b between the adhesive fixing portion 21 on one end side where the second nozzle 52a is formed and the outer region 5b, and a predetermined length from the boundary 21b to the outer region 5b side. This is the second end region R2 including the region extended by L2.

第１端部領域Ｒ１における境界２０ｂからの長さＬ１については、５ｃｍ以上であることが望ましい。また、本実施形態の中空糸膜モジュール１においては、上述したように第２ノズル５２ａから濃縮液が排出されるが、濃縮液が第２ノズル５２ａから排出される際、第２ノズル５２ａ付近の中空糸膜２に吸引力が働いて破断傾向が高まり、中空糸膜２が破断しやすくなる場合がある。したがって、第２端部領域Ｒ２における境界２１ｂからの長さＬ２については、図４に示すように、第２端部領域Ｒ２の下端が、第２ノズル５２ａのハウジング５内側面側の開口の下端よりも下側に位置する長さとすることが望ましい。これにより第２ノズル５２ａから濃縮液が排出される際に発生する吸引力に起因する第２ノズル５２ａ付近の中空糸膜２の変形を抑制することができ、中空糸膜２の破断をより抑制することができる。   The length L1 from the boundary 20b in the first end region R1 is desirably 5 cm or more. Further, in the hollow fiber membrane module 1 of the present embodiment, as described above, the concentrated liquid is discharged from the second nozzle 52a. When the concentrated liquid is discharged from the second nozzle 52a, the concentrated liquid near the second nozzle 52a is discharged. In some cases, suction force acts on the hollow fiber membrane 2 to increase the breaking tendency, and the hollow fiber membrane 2 may be easily broken. Therefore, with respect to the length L2 from the boundary 21b in the second end region R2, as shown in FIG. 4, the lower end of the second end region R2 is the lower end of the opening on the inner surface side of the housing 5 of the second nozzle 52a. It is desirable that the length is located on the lower side. Thereby, deformation of the hollow fiber membrane 2 in the vicinity of the second nozzle 52a due to suction force generated when the concentrated liquid is discharged from the second nozzle 52a can be suppressed, and breakage of the hollow fiber membrane 2 is further suppressed. can do.

保護部材８と中空糸膜束３の外周面とを密着させる方法としては、具体的には、保護部材８で包んだ中空糸膜束３をハウジング５内に挿入した後、保護部材８で包まれた中空糸膜束３の外周面の外側の適所に、複数の柱状部材を挿入することによって中空糸膜束３の外周面と保護部材８とを密着させた状態とすることができる。これにより、簡易な方法によって中空糸膜束３の外周面と保護部材８とを密着させることができる。   Specifically, as a method for bringing the protective member 8 and the outer peripheral surface of the hollow fiber membrane bundle 3 into close contact, the hollow fiber membrane bundle 3 wrapped with the protective member 8 is inserted into the housing 5 and then wrapped with the protective member 8. The outer peripheral surface of the hollow fiber membrane bundle 3 and the protective member 8 can be brought into close contact with each other by inserting a plurality of columnar members at appropriate positions outside the outer peripheral surface of the hollow fiber membrane bundle 3. Thereby, the outer peripheral surface of the hollow fiber membrane bundle 3 and the protection member 8 can be adhered by a simple method.

そして、中空糸膜束３の外周面と保護部材８とを密着させた状態とした後、ハウジング５の両端部にポッティング材を注入することによって接着固定部２０，２１が形成される。第２ノズル５２ａが形成された上側の接着固定部２１内の柱状部材については、そのまま接着固定部２１内に残されたままとされる。図４は、図１に示す中空糸膜モジュール１のＡ−Ｂ線断面図を示すものであり、図４における２１ａが柱状部材である。   After the outer peripheral surface of the hollow fiber membrane bundle 3 and the protective member 8 are brought into close contact with each other, the potting material is injected into both end portions of the housing 5 to form the adhesive fixing portions 20 and 21. The columnar member in the upper adhesive fixing part 21 where the second nozzle 52a is formed is left as it is in the adhesive fixing part 21. FIG. 4 is a cross-sectional view taken along line AB of the hollow fiber membrane module 1 shown in FIG. 1, and reference numeral 21a in FIG. 4 denotes a columnar member.

また、反対側の接着固定部２０内の柱状部材については、接着固定部２１が形成された後に取り除かれ、これにより上述した複数の貫通孔２０ａが形成される。これにより複数の貫通孔２０ａを簡易な方法によって形成することができる。   Further, the columnar member in the adhesive fixing portion 20 on the opposite side is removed after the adhesive fixing portion 21 is formed, thereby forming the plurality of through holes 20a described above. Thereby, the plurality of through holes 20a can be formed by a simple method.

上側の接着固定部２１内の柱状部材２１ａの長さについては、接着固定部２１の厚みと同等以上であることが必要であり、図３に示す接着固定部２１の厚みＬ３の１倍以上１．１倍以下に制御することが好ましい。   The length of the columnar member 21a in the upper adhesive fixing portion 21 needs to be equal to or greater than the thickness of the adhesive fixing portion 21, and is 1 or more times the thickness L3 of the adhesive fixing portion 21 shown in FIG. It is preferable to control to 1 times or less.

また、下側の接着固定部２０内に設置される柱状部材については、上述したように接着完了後に抜き取り、貫通孔２０ａを形成するため、接着固定部２０の厚みＬ４以上の長さであることが望ましい。   In addition, the columnar member installed in the lower adhesive fixing portion 20 is extracted after completion of bonding as described above and forms a through hole 20a, so that the length is equal to or greater than the thickness L4 of the adhesive fixing portion 20. Is desirable.

なお、柱状部材は、図２および図４に示すように、中空糸膜束３の外周面に対してほぼ均等な間隔で配置することが望ましい。また、柱状部材の太さと本数を制御することで保護部材８内部の中空糸膜２の本数を制御できる。   It is desirable that the columnar members are arranged at substantially equal intervals with respect to the outer peripheral surface of the hollow fiber membrane bundle 3 as shown in FIGS. Moreover, the number of the hollow fiber membranes 2 inside the protective member 8 can be controlled by controlling the thickness and the number of the columnar members.

柱状部材の先端部分は、たとえば錐状にするなどして長さ方向についてテーパー形状に形成することが望ましい。このように柱状部材２１ａの先端部分をテーパー形状にすることによって、柱状部材２１ａを保護部材８の外周部とハウジング５の内壁との間に挿入しやすくなり、かつ貫通孔２０ａ形成時の抜取性を良くすることができる。   It is desirable to form the tip portion of the columnar member in a tapered shape in the length direction by, for example, conical shape. Thus, by making the tip part of the columnar member 21a into a tapered shape, the columnar member 21a can be easily inserted between the outer peripheral portion of the protective member 8 and the inner wall of the housing 5, and the pull-out property when the through hole 20a is formed. Can be improved.

柱状部材の断面形状は特に限定されるものではなく、円形、楕円形、四角形、六角形、扇形等の多角形や板状が例として挙げられるが、柱状部材が保護部材８に接触したときに保護部材８に損傷を与える恐れのない円形または楕円形であることが好ましい。   The cross-sectional shape of the columnar member is not particularly limited, and examples thereof include polygons and plate shapes such as a circle, an ellipse, a quadrangle, a hexagon, and a fan, but when the columnar member contacts the protective member 8 It is preferable that the protective member 8 has a circular shape or an elliptical shape that does not cause damage.

また、柱状部材は、ハウジング５内への挿入時に保護部材８を傷つけず、かつ接着固定部２０からの抜き取り時の作業性を考慮して太さを決定すればよく、具体的には３mm〜保護部材８の内径の範囲から任意に決定される。なお、柱状部材の「太さ」とは、長さ方向においてその断面積が最も大きい部分の円相当直径を意味する。   Further, the thickness of the columnar member may be determined in consideration of workability at the time of extraction from the adhesive fixing portion 20 without damaging the protective member 8 when inserted into the housing 5, specifically from 3 mm to It is arbitrarily determined from the range of the inner diameter of the protective member 8. The “thickness” of the columnar member means a circle-equivalent diameter of a portion having the largest cross-sectional area in the length direction.

柱状部材の材質としては、高分子材料、無機材料、および金属材料等を用いることができ、特に限定されないが、上側の接着固定部２１に挿入する柱状部材２１ａの材質としては、接着固定部２１を構成するポッティング材と接着力を有し、かつ、該ポッティング材と同等又はそれ以上の引張弾性率を有するものが好ましい。一方、下側の接着固定部２０に挿入する柱状部材は、ポッティング材との接着力が弱い材質で形成し、かつ、剥離可能な構造としておくことが好ましい。具体的には、柱状部材の長さ方向の断面形状が円形または楕円形状であることが好ましい。   The material of the columnar member can be a polymer material, an inorganic material, a metal material, or the like, and is not particularly limited, but the material of the columnar member 21a inserted into the upper adhesive fixing portion 21 is an adhesive fixing portion 21. It is preferable that the material has an adhesive force with the potting material constituting the material and has a tensile modulus equal to or higher than that of the potting material. On the other hand, it is preferable that the columnar member inserted into the lower adhesive fixing portion 20 is formed of a material having a weak adhesive force with the potting material and has a peelable structure. Specifically, the cross-sectional shape in the length direction of the columnar member is preferably circular or elliptical.

ここで、上述したように、本実施形態の中空糸膜モジュール１では、両端部で接着固定される中空糸膜束３は保護部材８で保護されており、かつ少なくとも上述した第１端部領域Ｒ１および第２端部領域Ｒ２において、中空糸膜束３の最外周に配置された中空糸膜２と保護部材８が、密着した状態で接着固定されていることが重要である。   Here, as described above, in the hollow fiber membrane module 1 of the present embodiment, the hollow fiber membrane bundle 3 bonded and fixed at both ends is protected by the protective member 8 and at least the first end region described above. In R1 and the second end region R2, it is important that the hollow fiber membrane 2 disposed on the outermost periphery of the hollow fiber membrane bundle 3 and the protective member 8 are bonded and fixed in close contact.

本発明では、保護部材８の内周の長さをL、保護部材８に接触している中空糸膜２の本数をm、保護部材８内に充填される中空糸膜２の外径をdとしたとき、md／Lを密着率と定義し、md／L≧0.90の状態を密着した状態と定義する。ただし、密着率が高いほど好ましく、md／L≧0.95であることがさらに好ましい。尚、中空糸膜２の外径に比べて保護部材の内径が十分大きい場合、理論上、保護部材８に接触可能な最外周部の中空糸膜２の最大本数をＭとすると、L≒Mdが成り立つので、md／L≒md／Md＝m／Mの近似式が成立する。   In the present invention, the length of the inner periphery of the protective member 8 is L, the number of hollow fiber membranes 2 in contact with the protective member 8 is m, and the outer diameter of the hollow fiber membrane 2 filled in the protective member 8 is d. In this case, md / L is defined as the close contact rate, and the state of md / L ≧ 0.90 is defined as the close contact state. However, it is preferable that the adhesion rate is high, and it is more preferable that md / L ≧ 0.95. If the inner diameter of the protective member is sufficiently larger than the outer diameter of the hollow fiber membrane 2, theoretically, L≈Md, where M is the maximum number of the hollow fiber membranes 2 on the outermost periphery that can contact the protective member 8. Therefore, the approximate expression of md / L≈md / Md = m / M is established.

また、保護部材８と中空糸膜２とが接触しているとは、中空糸膜束３の最外周部に配置された中空糸膜２と保護部材８とが、接着固定部２０，２１の厚み方向（中空糸膜２の長手方向）について少なくとも1点以上で接触していることをいう。   In addition, the protection member 8 and the hollow fiber membrane 2 are in contact with each other when the hollow fiber membrane 2 and the protection member 8 disposed on the outermost peripheral portion of the hollow fiber membrane bundle 3 are bonded to the adhesive fixing portions 20 and 21. It means contacting at least one point in the thickness direction (longitudinal direction of the hollow fiber membrane 2).

また、上記実施形態の中空糸膜モジュール１においては、複数の貫通孔２０ａの開口面積の和をA、開口された側（図１における接着固定部２１側）の中空糸膜の中空部の総開口面積の和をBとしたとき、A／Bが１．０より大きくなると保護部材８の外側に配置される貫通孔２０ａが、下端部の接着固定部２０の内側の膜充填可能領域を減じてしまうため好ましくない。また、A/Bが０．０５未満では必要水量を中空糸膜モジュール１内部に供給するために入側供給圧を高くしなければならなくなり、その結果、接着強度を高めるなどの別途対策が必要になるため好ましくない。そのため、A／Bは０．０５以上１．０以下が好ましい。さらに、下端部の接着固定部２０の内側の膜充填可能領域を確保しつつ中空糸膜モジュール１内部に抵抗なく原水を供給するためには、A／Bは０．０８以上０．６以下とすることがより好ましい。   Moreover, in the hollow fiber membrane module 1 of the said embodiment, the sum of the opening area of the several through-hole 20a is A, and the total of the hollow part of the hollow fiber membrane of the open side (adhesion fixing part 21 side in FIG. 1) is carried out. Assuming that the sum of the opening areas is B, when A / B is greater than 1.0, the through-hole 20a disposed outside the protective member 8 reduces the film-fillable region inside the adhesive fixing portion 20 at the lower end. This is not preferable. Also, if A / B is less than 0.05, the supply pressure on the inlet side must be increased to supply the required amount of water into the hollow fiber membrane module 1, and as a result, additional measures such as increasing the adhesive strength are required. This is not preferable. Therefore, A / B is preferably 0.05 or more and 1.0 or less. Furthermore, in order to supply raw water without resistance to the inside of the hollow fiber membrane module 1 while ensuring a membrane-fillable region inside the adhesive fixing portion 20 at the lower end, A / B is 0.08 or more and 0.6 or less. More preferably.

次に、上記実施形態の外圧式中空糸膜モジュール１の製造方法について、詳細に説明する。   Next, the manufacturing method of the external pressure type | formula hollow fiber membrane module 1 of the said embodiment is demonstrated in detail.

まず、所定の本数の中空糸膜２を束として整え、中空糸膜束３を作製する。続いて、中空糸膜束３の各中空糸膜２の一端部の開口を封止物で目止めして封止する。封止物としては、たとえば石膏が用いられるが、その他の材料を用いてもよい。   First, a predetermined number of hollow fiber membranes 2 are arranged as a bundle to produce a hollow fiber membrane bundle 3. Subsequently, the opening at one end of each hollow fiber membrane 2 of the hollow fiber membrane bundle 3 is sealed with a sealing material and sealed. For example, gypsum is used as the sealing material, but other materials may be used.

次に、第３筒状部材５３の両端に対して、第１筒状部材５１および第２筒状部材５２が接合されてハウジング５が形成されるとともに、第１整流筒６および第２整流筒７が取り付けられてモジュールケース本体が形成される。そして、一端部の開口が封止された中空糸膜束３の外周面を保護部材８で包み、その保護部材８で包んだ中空糸膜束３をハウジング５内に挿入する。なお、この際、中空糸膜束３の中空部が封止された側が、第２筒状部材５２側に位置するように挿入される。   Next, the first cylindrical member 51 and the second cylindrical member 52 are joined to both ends of the third cylindrical member 53 to form the housing 5, and the first rectifying cylinder 6 and the second rectifying cylinder. 7 is attached to form a module case body. Then, the outer peripheral surface of the hollow fiber membrane bundle 3 whose one end is sealed is wrapped with a protective member 8, and the hollow fiber membrane bundle 3 wrapped with the protective member 8 is inserted into the housing 5. At this time, the hollow fiber membrane bundle 3 is inserted so that the side where the hollow portion is sealed is positioned on the second tubular member 52 side.

そして、その後、保護部材８で包まれた中空糸膜束３の外周面と第１および第２整流筒６，７との間に複数の柱状部材を挿入することによって中空糸膜束３の外周面と保護部材８とを密着させた状態とする。   Then, the outer periphery of the hollow fiber membrane bundle 3 is inserted by inserting a plurality of columnar members between the outer peripheral surface of the hollow fiber membrane bundle 3 wrapped with the protective member 8 and the first and second rectifying cylinders 6 and 7. The surface and the protective member 8 are brought into close contact with each other.

次いで、中空糸膜束３の外周面と保護部材８とを密着させた状態とした後、ハウジング５の両端に接着固定部形成用容器を取り付け、ハウジング５の両端部にポッティング材を注入することによって接着固定部２０，２１を形成する。そして、接着固定部２０，２１が形成された後、接着固定部２０側の柱状部材を取り除くことによって複数の貫通孔２０ａを形成する。なお、第１筒状部材５２側の中空糸膜束３の中空部は、ポッティング材によって閉塞される。   Next, after the outer peripheral surface of the hollow fiber membrane bundle 3 and the protection member 8 are brought into close contact with each other, an adhesive fixing portion forming container is attached to both ends of the housing 5, and a potting material is injected into both ends of the housing 5. Thus, the adhesive fixing portions 20 and 21 are formed. Then, after the adhesive fixing portions 20 and 21 are formed, the plurality of through holes 20a are formed by removing the columnar member on the adhesive fixing portion 20 side. In addition, the hollow part of the hollow fiber membrane bundle 3 by the side of the 1st cylindrical member 52 is obstruct | occluded with the potting material.

中空糸膜束３とハウジング５とを接着固定するには、中空糸膜束３が収容されたハウジング５を水平方向に回転させながら接着する遠心接着、またはハウジング５の長手方向を鉛直方向に配置し、ポッティング材をハウジング５の下端から注入する静置接着にて行うことができる。遠心接着は、中空糸膜束３の両端を同時に接着することができる反面、多額の設備投資や高速で回転させるための電力が必要となる。一方、静置接着は、片側ずつ接着する必要があるため接着に必要な時間は増加するものの、大型の設備投資の必要がなく、簡素な治具で実施できる。なお、ポッティング材が硬化した後、必要に応じて高温での完全硬化を実施しても良い。   In order to bond and fix the hollow fiber membrane bundle 3 and the housing 5, centrifugal bonding is performed in which the housing 5 in which the hollow fiber membrane bundle 3 is accommodated is rotated in the horizontal direction, or the longitudinal direction of the housing 5 is arranged in the vertical direction. The potting material can be injected by static adhesion from the lower end of the housing 5. Centrifugal bonding can bond both ends of the hollow fiber membrane bundle 3 at the same time, but requires large capital investment and electric power for rotating at high speed. On the other hand, the static adhesion needs to be bonded one by one, so that the time required for the bonding increases, but there is no need for large-scale equipment investment, and it can be performed with a simple jig. In addition, after the potting material is cured, complete curing at a high temperature may be performed as necessary.

次に、ケーシング５内のポッティング材が硬化したことを確認した後、接着固定部形成用容器が取り除かれ、第２筒状部材５２側の接着固定部２１の端部を切断することによって、中空糸膜束３の中空部を開口させる。   Next, after confirming that the potting material in the casing 5 has hardened, the container for forming the adhesive fixing part is removed, and the end of the adhesive fixing part 21 on the second cylindrical member 52 side is cut to make it hollow. The hollow part of the thread membrane bundle 3 is opened.

最後に、中空糸膜束３が接着固定されたハウジング５の両端部のそれぞれに、配管接続用のキャップ１０，１１がサニタリーガスケット１２を介して装着され、クランプ１３によって締結固定された後、リーク検査、試運転等を実施し、規定通りに製造できていることを確認して中空糸膜モジュール１が完成する。   Finally, caps 10 and 11 for connecting pipes are attached to both ends of the housing 5 to which the hollow fiber membrane bundle 3 is bonded and fixed via a sanitary gasket 12 and fastened and fixed by a clamp 13. Inspection, trial operation, etc. are carried out, and it is confirmed that the product has been manufactured as specified, and the hollow fiber membrane module 1 is completed.

なお、上記実施形態の中空糸膜モジュール１においては、ネット状の保護部材８を用いて、中空糸膜束３の外周面の略全体を包むようにしたが、ネット状の部材に限らず、シート状の部材を筒状に形成したものを保護部材として用いるようにしてもよい。ただし、このようにシート状の部材からなる保護部材を用いる場合には、ろ過効率の低下を招かないように、中空糸膜束３の外周面の略全体ではなく、中空糸膜束３の両端部のみ、または中空糸膜束３の一端部のみに設けることが望ましい。具体的には、上述した第１端部領域Ｒ１および第２端部領域Ｒ２のみ、第１端部領域Ｒ１のみ、または第２端部領域Ｒ２のみにシート状の保護部材を設けることが望ましい。   In the hollow fiber membrane module 1 of the above embodiment, the net-like protective member 8 is used to wrap substantially the entire outer peripheral surface of the hollow fiber membrane bundle 3, but the sheet is not limited to the net-like member. A cylindrical member formed in a cylindrical shape may be used as the protective member. However, in the case of using a protective member made of a sheet-like member in this way, not both of the entire outer peripheral surface of the hollow fiber membrane bundle 3 but both ends of the hollow fiber membrane bundle 3 so as not to cause a reduction in filtration efficiency. It is desirable to provide only at one part or only at one end of the hollow fiber membrane bundle 3. Specifically, it is desirable to provide a sheet-like protective member only in the first end region R1 and the second end region R2 described above, only in the first end region R1, or only in the second end region R2.

また、シート状の部材は、可撓性を有するものであり、その材質としては、ポリスルホン、ポリエーテルスルホン、ポリイミド系樹脂、およびフッ素ゴム等の耐熱性を有する材質を用いることが望ましい。   The sheet-like member is flexible, and it is desirable to use a heat-resistant material such as polysulfone, polyethersulfone, polyimide resin, and fluororubber as the material.

次に、本発明の外圧式中空糸膜モジュールの実施例および比較例について説明する。下表１は、実施例１〜実施例６および比較例１〜比較例３の各中空糸膜モジュールの製造条件およびろ過耐久性試験の結果を示したものである。   Next, examples and comparative examples of the external pressure type hollow fiber membrane module of the present invention will be described. Table 1 below shows the manufacturing conditions and the results of the filtration durability test for each hollow fiber membrane module of Examples 1 to 6 and Comparative Examples 1 to 3.

（実施例１）
以下、実施例１の中空糸膜モジュールの製造工程を説明する。 Example 1
Hereinafter, the manufacturing process of the hollow fiber membrane module of Example 1 will be described.

片端の中空部を封止したＰＳ製中空糸膜（旭化成製）２９７０本を束ねて中空糸膜束３を形成し、内径８０mmの筒状に成型されたＰＦＡ製保護ネット（保護部材８に相当するものである）に挿入した後、該保護ネットに挿入された中空糸膜束３を内径８３mmの第１および第２整流筒６，７が内側に装着された第１および第２筒状部材５１，５２を有するハウジング５内に挿入した。第１および第２筒状部材５１，５２は、それぞれ内径２３mmの第１および第２ノズル５１ａ，５２ａを有している。実施例１で用いた中空糸膜２は、分画分子量６０００、内径０．７５mm、外径１．３５mmである。   A hollow fiber membrane bundle 3 is formed by bundling 2970 PS hollow fiber membranes (manufactured by Asahi Kasei) with a hollow portion sealed at one end, and a PFA protective net (corresponding to protective member 8) formed into a cylindrical shape with an inner diameter of 80 mm. The first and second tubular members in which the first and second flow straightening cylinders 6 and 7 having an inner diameter of 83 mm are mounted on the hollow fiber membrane bundle 3 inserted in the protective net after being inserted into the protective net. It was inserted into the housing 5 having 51 and 52. The first and second cylindrical members 51 and 52 have first and second nozzles 51a and 52a having an inner diameter of 23 mm, respectively. The hollow fiber membrane 2 used in Example 1 has a molecular weight cut-off of 6000, an inner diameter of 0.75 mm, and an outer diameter of 1.35 mm.

そして、中空糸膜束３の中空部が開口した側の保護ネットと第１整流筒６の間に、外径１１mmのポリエチレン製の円柱棒（柱状部材に相当するものである）を５本挿入して設置した。円柱棒は、保護ネットの外周面の周方向について、略均等な間隔で分布するように挿入して配置した。   Then, five polyethylene cylindrical rods (corresponding to columnar members) having an outer diameter of 11 mm are inserted between the protective net on the side where the hollow portion of the hollow fiber membrane bundle 3 is opened and the first rectifying cylinder 6. Installed. The cylindrical rods were inserted and arranged so as to be distributed at substantially equal intervals in the circumferential direction of the outer peripheral surface of the protective net.

また、中空糸膜束３の中空部を接着前に封止した側の保護ネットと第２整流筒７の間に、外径１１mmの円柱棒５本を挿入して設置した。この円柱棒としては、予めポッティング材を型に流延して硬化させて成型したものを用いた。円柱棒は、保護ネットの外周面の周方向について、略均等な間隔で分布するように挿入して配置した。   Further, five cylindrical rods having an outer diameter of 11 mm were inserted between the protective net on the side where the hollow portion of the hollow fiber membrane bundle 3 was sealed before bonding and the second rectifying cylinder 7. As this cylindrical bar, a potting material cast in advance on a mold and cured and molded was used. The cylindrical rods were inserted and arranged so as to be distributed at substantially equal intervals in the circumferential direction of the outer peripheral surface of the protective net.

次いで、ポッティング材導入用チューブを取り付けた接着固定部形成用容器をハウジング５の両端部に固定し、第１および第２ノズル５１ａ，５２ａの中心軸を鉛直下方向に対して４５°の向きにするとともに、ハウジング５を水平にして遠心用フレームに固定し、ハウジング５を水平方向に回転させることによって、ポッティング材をハウジング５の第１および第２筒状部材５１，５２内に注入した。ポッティング材としては、２液性硬化型エポキシ樹脂を用いた。ポッティング材の硬化反応が進行して流動化が停止した時点で遠心機の回転を停止して取り出し、オーブン中で９０℃に加熱してキュアーした。   Next, the adhesive fixing portion forming container to which the potting material introducing tube is attached is fixed to both ends of the housing 5, and the central axes of the first and second nozzles 51a and 52a are oriented at 45 ° with respect to the vertically downward direction. In addition, the potting material was injected into the first and second cylindrical members 51 and 52 of the housing 5 by horizontally fixing the housing 5 to the centrifugal frame and rotating the housing 5 in the horizontal direction. As the potting material, a two-component curable epoxy resin was used. When the hardening reaction of the potting material progressed and fluidization stopped, the rotation of the centrifuge was stopped and taken out, and it was cured by heating to 90 ° C. in an oven.

その後、ハウジング５の端部を切断することによって接着前の段階で封止した側の中空糸膜束３の中空部を開口させ、一方、反対側のポリエチレン製円柱棒を取り外して貫通孔２０ａを形成した。尚、実施例１の中空糸膜モジュールの膜有効長は１ｍであり、A／Bは０．３６である。次いで、サニタリーガスケット１２を介してキャップ１０、１０をクランプ１３によって固定した後、中空部が開口した側を上側にして中空糸膜モジュールをろ過装置に取り付け、以下のろ過耐久性試験を行った。   After that, the hollow portion of the hollow fiber membrane bundle 3 on the side sealed in the stage before bonding is opened by cutting the end portion of the housing 5, while the through-hole 20 a is removed by removing the polyethylene cylindrical rod on the opposite side. Formed. In addition, the membrane effective length of the hollow fiber membrane module of Example 1 is 1 m, and A / B is 0.36. Next, after the caps 10 and 10 were fixed by the clamp 13 through the sanitary gasket 12, the hollow fiber membrane module was attached to the filtration device with the side where the hollow portion was opened upward, and the following filtration durability test was performed.

下側の接着固定部２０に設けられた５箇所の貫通孔２０ａから清浄水を合計３．５ｍ３／ｈの流量で供給し、上側の接着固定部２１内の中空糸膜束３の中空部からろ過水を３．１ｍ３／ｈで排出し、上側側面の第２ノズル５２ａから濃縮液を０．４ｍ３／ｈで排出させる運転を行った。下側側面の第１ノズル５１ａはブラインドプレートを装着して封止した。１日１回、１回５分程度のリークチェック作業以外は連続的に上記の運転を実施した。 Clean water is supplied from the five through holes 20a provided in the lower adhesive fixing part 20 at a total flow rate of 3.5 m 3 / h, and the hollow part of the hollow fiber membrane bundle 3 in the upper adhesive fixing part 21 Then, the filtered water was discharged at 3.1 m 3 / h, and the concentrated liquid was discharged at 0.4 m 3 / h from the second nozzle 52a on the upper side surface. The first nozzle 51a on the lower side surface was sealed with a blind plate. The above operation was continuously performed once a day except for the leak check work once a day for about 5 minutes.

１年間の運転後でも中空糸膜２の破断によるリークは発生しなかった。   Even after one year of operation, no leakage due to breakage of the hollow fiber membrane 2 occurred.

この試験の終了後、第１整流筒６より１ｃｍ程度上側の位置で切断した後、第１筒状部材５１を接着固定部２０から剥離除去し、さらに第１整流筒６を接着固定部２０との界面部で切り取った後、中空糸膜２をむしり取って中空糸膜束３の最外周部の中空糸膜２と保護ネットの密着状態を詳細に観察した。中空糸膜束３の最外周部の中空糸膜２の本数Ｍ１を計測し、そのうち保護ネットと接触している中空糸膜２の本数ｍ１を計測した結果、密着率ｍ１／Ｍ１が０．９７であった。 After the end of this test, after cutting at a position about 1 cm above the first rectifying cylinder 6, the first cylindrical member 51 is peeled off from the adhesive fixing part 20, and the first rectifying cylinder 6 is connected to the adhesive fixing part 20. Then, the hollow fiber membrane 2 was peeled off, and the contact state between the hollow fiber membrane 2 at the outermost peripheral portion of the hollow fiber membrane bundle 3 and the protective net was observed in detail. As a result of measuring the number M 1 of the hollow fiber membranes 2 at the outermost peripheral portion of the hollow fiber membrane bundle 3 and measuring the number m 1 of the hollow fiber membranes 2 in contact with the protective net, the adhesion rate m 1 / M 1 Was 0.97.

（実施例２）
実施例２では、保護ネットの代わりに中空糸膜束３の両端部（第１端部領域Ｒ１および第２端部領域Ｒ２）のみを厚さ０．１mmのＰＶＡ製シートで包んで中空糸膜束３に密着させたこと以外は、実施例１と同様に製作した中空糸膜モジュールをろ過装置に取り付け、実施例１と同様の運転条件でろ過耐久性試験を行った。 (Example 2)
In Example 2, instead of the protective net, only the both ends (first end region R1 and second end region R2) of the hollow fiber membrane bundle 3 are wrapped with a PVA sheet having a thickness of 0.1 mm to form a hollow fiber membrane. A hollow fiber membrane module manufactured in the same manner as in Example 1 except that it was brought into close contact with the bundle 3 was attached to a filtration device, and a filtration durability test was performed under the same operating conditions as in Example 1.

１年間の運転後でも中空糸膜２の破断によるリークは発生しなかった。   Even after one year of operation, no leakage due to breakage of the hollow fiber membrane 2 occurred.

この試験の終了後、実施例１と同様にして、中空糸膜束３の最外周部の中空糸膜２とＰＶＡ製シートの密着状態を詳細に観察した。中空糸膜束３の最外周部の中空糸膜２の本数Ｍ２を計測し、そのうちＰＶＡ製シートと接触している中空糸膜２の本数ｍ２を計測した結果、密着率ｍ２／Ｍ２が０．９９であった。 After the completion of this test, in the same manner as in Example 1, the close contact state between the hollow fiber membrane 2 at the outermost peripheral portion of the hollow fiber membrane bundle 3 and the PVA sheet was observed in detail. As a result of measuring the number M 2 of the hollow fiber membranes 2 at the outermost periphery of the hollow fiber membrane bundle 3 and measuring the number m 2 of the hollow fiber membranes 2 in contact with the PVA sheet, the adhesion rate m 2 / M 2 was 0.99.

（実施例３）
実施例３では、ポッティング材による接着前において中空部が開口した側の保護ネットと第１整流筒６の間に外径５mmのポリエチレン製円柱棒５本を挿入して設置したこと以外は、実施例１と同様にしてモジュールを製作した。このモジュールのA／B＝０．０７５であった。 (Example 3)
In Example 3, it was carried out except that five polyethylene cylinder rods having an outer diameter of 5 mm were inserted and installed between the protective net on the side where the hollow portion was opened before bonding with the potting material and the first rectifying cylinder 6. A module was produced in the same manner as in Example 1. A / B of this module was 0.075.

この中空糸膜モジュールを用いて実施例１と同様にろ過耐久性試験を行ったところ、８ヶ月間の運転後で中空糸膜２の破断によるリークは確認されなかった。   When this hollow fiber membrane module was used to conduct a filtration durability test in the same manner as in Example 1, no leakage due to breakage of the hollow fiber membrane 2 was confirmed after operation for 8 months.

この試験の終了後、実施例１と同様にして、中空糸膜束３の最外周部の中空糸膜２と保護ネットの密着状態を詳細に観察した。中空糸膜束３の最外周部の中空糸本数Ｍ３を計測し、そのうち保護ネットと接触している中空糸膜２の本数ｍ３を計測した結果、密着率ｍ３／Ｍ３が０．９５であった。 After the completion of this test, the close contact state between the hollow fiber membrane 2 at the outermost peripheral portion of the hollow fiber membrane bundle 3 and the protective net was observed in the same manner as in Example 1. As a result of measuring the number M 3 of hollow fibers in the outermost peripheral portion of the hollow fiber membrane bundle 3 and measuring the number m 3 of the hollow fiber membranes 2 in contact with the protective net, the adhesion rate m 3 / M 3 is 0. 95.

（実施例４）
実施例４では、ポッティング材による接着前に中空部が開口した側の保護ネットと第１整流筒６の間に外径５mmのポリエチレン製円柱棒５本を挿入し、ポリエチレン製円柱棒５本をランダムに配置することによって密着率を意図的に減じたこと以外は、実施例１と同様にしてモジュールを製作した。このモジュールのA/Bは０．０７５であった。 Example 4
In Example 4, five polyethylene cylindrical rods having an outer diameter of 5 mm were inserted between the protective net on the side where the hollow portion was opened before bonding with the potting material and the first rectifying cylinder 6, and the five polyethylene cylindrical rods were inserted. A module was produced in the same manner as in Example 1 except that the adhesion rate was intentionally reduced by randomly arranging. The A / B of this module was 0.075.

このモジュールを用いて実施例１と同様にろ過耐久性試験を行ったところ、２ヶ月間の運転後で中空糸膜２の破断によるリークが確認された。   When this module was used and the filtration durability test was done like Example 1, the leak by the fracture | rupture of the hollow fiber membrane 2 was confirmed after the operation for 2 months.

この試験の終了後、第２整流筒７より５ｃｍ程度下側の位置で切断し、リーク箇所を確認した結果、中空糸膜束３の最外周部の６本の中空糸が、接着固定部２１と外側領域５ｂとの境界部で破断しているのを確認した。   After the end of this test, cutting was performed at a position about 5 cm below the second rectifying cylinder 7 and the leaked portion was confirmed. As a result, the six hollow fibers at the outermost peripheral portion of the hollow fiber membrane bundle 3 were bonded to the adhesive fixing portion 21. It was confirmed that the fracture occurred at the boundary between the outer region 5b and the outer region 5b.

この後、中空糸膜２をむしり取って中空糸膜束３の最外周部の中空糸膜２と保護ネットの密着状態を詳細に観察した。中空糸膜束３の最外周部の中空糸本数Ｍ４を計測し、そのうち保護ネットと密着している中空糸膜２の本数ｍ４を計測した結果、密着率ｍ４／Ｍ４が０．９３であった。 Thereafter, the hollow fiber membrane 2 was peeled off, and the contact state between the hollow fiber membrane 2 at the outermost periphery of the hollow fiber membrane bundle 3 and the protective net was observed in detail. As a result of measuring the number M 4 of hollow fibers in the outermost peripheral portion of the hollow fiber membrane bundle 3 and measuring the number m 4 of the hollow fiber membranes 2 in close contact with the protective net, the adhesion rate m 4 / M 4 is 0. 93.

（実施例５）
実施例５では、ポッティング材による接着前に中空部が開口した側の保護ネットと第１整流筒６の間に外径３mmのポリエチレン製円柱棒５本を挿入し、ポリエチレン製円柱棒５本をランダムに配置することによって密着率を意図的に減じ、A/Bが０．０５未満となるようにしたこと以外は、実施例１と同様にしてモジュールを製作した。このモジュールのA/Bは０．０２７であった。 (Example 5)
In Example 5, five polyethylene cylindrical rods with an outer diameter of 3 mm were inserted between the protective net on the side where the hollow portion was opened before bonding with the potting material and the first rectifying cylinder 6, and five polyethylene cylindrical rods were attached. A module was manufactured in the same manner as in Example 1 except that the adhesion rate was intentionally reduced by randomly disposing it so that A / B was less than 0.05. The A / B of this module was 0.027.

このモジュールを用いて実施例１と同様にろ過耐久性試験を行ったところ、２ヶ月間の運転後で中空糸膜２の破断によるリークが確認された。   When this module was used and the filtration durability test was done like Example 1, the leak by the fracture | rupture of the hollow fiber membrane 2 was confirmed after the operation for 2 months.

この試験の終了後、第２整流筒７より５ｃｍ程度下側の位置で切断し、リーク箇所を確認した結果、中空糸膜束３の最外周部の８本の中空糸が、接着固定部２１と外側領域５ｂとの境界部で破断しているのを確認した。   After the end of this test, cutting was performed at a position about 5 cm below the second rectifying cylinder 7 and the leak location was confirmed. As a result, eight hollow fibers at the outermost peripheral portion of the hollow fiber membrane bundle 3 were bonded to the adhesive fixing portion 21. It was confirmed that the fracture occurred at the boundary between the outer region 5b and the outer region 5b.

この後、中空糸膜２をむしり取って中空糸膜束３の最外周部の中空糸膜２と保護ネットの密着状態を詳細に観察した。中空糸膜束３の最外周部の中空糸本数Ｍ５を計測し、そのうち保護ネットと密着している中空糸膜２の本数ｍ５を計測した結果、密着率ｍ５／Ｍ５が０．９２であった。 Thereafter, the hollow fiber membrane 2 was peeled off, and the contact state between the hollow fiber membrane 2 at the outermost periphery of the hollow fiber membrane bundle 3 and the protective net was observed in detail. As a result of measuring the number M 5 of hollow fibers in the outermost peripheral portion of the hollow fiber membrane bundle 3 and measuring the number m 5 of the hollow fiber membranes 2 in close contact with the protective net, the adhesion rate m 5 / M 5 is 0. 92.

（実施例６）
実施例６では、保護ネットの代わりに中空糸膜束３の両端部（第１端部領域Ｒ１および第２端部領域Ｒ２）のみを厚さ０．１mmのＰＶＡ製シートで包み、且つ第１端部領域Ｒ１における境界２０ｂからの長さＬ１と第２端部領域Ｒ２における境界２１ｂからの長さＬ２が５ｍｍ以下になるようにして中空糸膜束３に密着させたこと以外は、実施例２と同様にしてモジュールを製作した。 (Example 6)
In Example 6, instead of the protective net, only both end portions (first end region R1 and second end region R2) of the hollow fiber membrane bundle 3 are wrapped with a PVA sheet having a thickness of 0.1 mm, and the first Example except that the length L1 from the boundary 20b in the end region R1 and the length L2 from the boundary 21b in the second end region R2 are closely adhered to the hollow fiber membrane bundle 3 so as to be 5 mm or less. A module was manufactured in the same manner as in 2.

このモジュールを用いて実施例１と同様にろ過耐久性試験を行ったところ、１０日間の運転後で中空糸膜２の破断によるリークが確認された。   When this module was used and the filtration durability test was done like Example 1, the leak by the fracture | rupture of the hollow fiber membrane 2 was confirmed after the driving | operation for 10 days.

この試験の終了後、第１整流筒６より５ｃｍ程度上側の位置と第２整流筒７より５ｃｍ程度下側の位置で切断し、リーク箇所を確認した結果、中空糸膜束３の最外周部の９本の中空糸が破断しているのを確認した。   After the end of this test, cutting was performed at a position about 5 cm above the first rectifying cylinder 6 and a position about 5 cm below the second rectifying cylinder 7, and as a result of confirming the leak location, the outermost peripheral part of the hollow fiber membrane bundle 3 9 hollow fibers were confirmed to be broken.

この後、実施例１と同様にして、中空糸膜束３の最外周部の中空糸膜２とＰＶＡ製シートの密着状態を詳細に観察した。中空糸膜束３の最外周部の中空糸膜２の本数Ｍ６を計測し、そのうちＰＶＡ製シートと接触している中空糸膜２の本数ｍ６を計測した結果、密着率ｍ６／Ｍ６はともに０．９９であった。 Thereafter, in the same manner as in Example 1, the contact state between the hollow fiber membrane 2 at the outermost periphery of the hollow fiber membrane bundle 3 and the PVA sheet was observed in detail. As a result of measuring the number M 6 of the hollow fiber membranes 2 at the outermost peripheral portion of the hollow fiber membrane bundle 3 and measuring the number m 6 of the hollow fiber membranes 2 in contact with the PVA sheet, the adhesion rate m 6 / M Both 6 were 0.99.

（比較例１）
比較例１では、保護ネットを使わずに実施例1と同様にして中空糸膜モジュールを製作した。 (Comparative Example 1)
In Comparative Example 1, a hollow fiber membrane module was manufactured in the same manner as in Example 1 without using a protective net.

この中空糸膜モジュールを用いて実施例１と同様にろ過耐久性試験を行ったところ、１ヶ月間の運転後で中空糸膜２の破断によるリークが確認された。   Using this hollow fiber membrane module, a filtration durability test was conducted in the same manner as in Example 1. As a result, leakage due to the breakage of the hollow fiber membrane 2 was confirmed after one month of operation.

この試験の終了後、第１整流筒６より５ｃｍ程度上側の位置で切断し、中空糸膜モジュールの接着固定部２０の内側で切断し、リーク箇所を確認した結果、下側の接着固定部２０の中空糸膜束３の最外周部に位置する中空糸膜２５本と上側の接着固定部２１の最外周部に位置する中空糸膜１１本が、接着固定部２０，２１と外側領域５ｂとの境界部で破断しているのを確認した。   After the end of this test, cutting was performed at a position about 5 cm above the first rectifying cylinder 6, cutting was performed inside the adhesive fixing part 20 of the hollow fiber membrane module, and the leak location was confirmed. As a result, the lower adhesive fixing part 20 25 hollow fiber membranes located on the outermost peripheral part of the hollow fiber membrane bundle 3 and 11 hollow fiber membranes located on the outermost peripheral part of the upper adhesive fixing part 21 are adhesive fixing parts 20 and 21 and an outer region 5b. It was confirmed that it was broken at the boundary.

（比較例２）
比較例２では、ポッティング材による接着前に中空部が開口した側の保護ネットの内側の中空糸膜束３の端部に外径１１mmのポリエチレン製円柱棒５本を均等に分布するように挿入して配置したこと以外は、実施例１と同様にしてモジュールを製作した。 (Comparative Example 2)
In Comparative Example 2, five polyethylene cylindrical rods having an outer diameter of 11 mm were inserted so as to be evenly distributed at the end of the hollow fiber membrane bundle 3 inside the protective net on the side where the hollow portion was opened before bonding with the potting material. A module was manufactured in the same manner as in Example 1 except that the module was arranged.

この中空糸膜モジュールを用いて実施例１と同様にろ過耐久性試験を行ったところ、１ヶ月間の運転後で中空糸膜２の破断によるリークが確認された。   Using this hollow fiber membrane module, a filtration durability test was conducted in the same manner as in Example 1. As a result, leakage due to the breakage of the hollow fiber membrane 2 was confirmed after one month of operation.

この試験の終了後、第１整流筒６より５ｃｍ程度上側の位置で切断し、リーク箇所を確認した結果、貫通孔２０ａ周辺の１２本の中空糸膜が、接着固定部２０と外側領域５ｂとの境界部で破断しているのを確認した。   After the end of this test, as a result of cutting at a position about 5 cm above the first rectifying cylinder 6 and confirming the leak location, the 12 hollow fiber membranes around the through-hole 20a are bonded to the adhesive fixing portion 20 and the outer region 5b. It was confirmed that it was broken at the boundary.

この後、中空糸膜２をむしり取って中空糸膜束３の最外周部の中空糸膜と保護ネットの密着状態を詳細に観察した。中空糸膜束３の最外周部の中空糸膜２の本数Ｍ７を計測し、そのうち保護ネットと接触している中空糸膜２の本数ｍ７を計測した結果、密着率ｍ７／Ｍ７が０．９２であった。 Thereafter, the hollow fiber membrane 2 was peeled off, and the contact state between the hollow fiber membrane at the outermost periphery of the hollow fiber membrane bundle 3 and the protective net was observed in detail. As a result of measuring the number M 7 of the hollow fiber membranes 2 at the outermost peripheral portion of the hollow fiber membrane bundle 3 and measuring the number m 7 of the hollow fiber membranes 2 in contact with the protective net, the adhesion rate m 7 / M 7 Was 0.92.

（比較例３）
中空糸膜２の本数を２３８０本に減じて、保護ネットと中空糸膜束３の最外周部の中空糸膜２との密着率を意図的に小さくなるようにしたこと以外は、実施例1と同様にしてモジュールを製作した。このモジュールのA／Bは０．４５であった。 (Comparative Example 3)
Example 1 except that the number of the hollow fiber membranes 2 is reduced to 2380 so that the adhesion rate between the protective net and the hollow fiber membrane 2 at the outermost peripheral portion of the hollow fiber membrane bundle 3 is intentionally reduced. A module was manufactured in the same manner as above. The A / B of this module was 0.45.

この中空糸膜モジュールを用いて実施例１と同様にろ過耐久試験を行ったところ、１
ヶ月の運転で中空糸膜２の破断によるリークが確認された。なお、比較例３では２０％中空糸膜本数を減じたので、中空糸膜２への負荷を実施例１と同じにするため、下側の接着固定部２０に設けられた５箇所の貫通孔２０ａから清浄水を合計２．８ｍ３／ｈの流量で供給し、上側の接着固定部２１内の中空糸膜束３の中空部からろ過水を２．５ｍ３／ｈで排出し、上側側面の第２ノズル５２ａからは濃縮液を０．３ｍ３／ｈで排出されるよう調整して運転を行った。 A filtration durability test was conducted in the same manner as in Example 1 using this hollow fiber membrane module.
Leaks due to breakage of the hollow fiber membrane 2 were confirmed after months of operation. In Comparative Example 3, the number of hollow fiber membranes was reduced by 20%. Therefore, in order to make the load on the hollow fiber membrane 2 the same as in Example 1, five through-holes provided in the lower adhesive fixing portion 20 were used. Clean water is supplied from 20a at a total flow rate of 2.8 m 3 / h, filtered water is discharged from the hollow part of the hollow fiber membrane bundle 3 in the upper adhesive fixing part 21 at 2.5 m 3 / h, and the upper side surface The second nozzle 52a was adjusted so that the concentrated liquid was discharged at 0.3 m 3 / h.

この試験の終了後、第１整流筒６より５ｃｍ程度上側の位置で切断し、リーク箇所を確認した結果、中空糸膜束３の最外周部の中空糸膜のうち保護ネットに接触していない１３本の中空糸膜２が、接着固定部２０と外側領域５ｂとの境界部で破断しているのを確認した。   After the end of this test, as a result of cutting at a position about 5 cm above the first rectifying cylinder 6 and confirming the leak location, the hollow fiber membrane bundle 3 is not in contact with the protective net among the outermost hollow fiber membranes. It was confirmed that 13 hollow fiber membranes 2 were broken at the boundary between the adhesive fixing portion 20 and the outer region 5b.

この後、中空糸膜２をむしり取って中空糸膜束３の最外周部の中空糸膜２と保護ネットの密着状態を詳細に観察した。中空糸膜束３の最外周部の中空糸膜の本数Ｍ８を計測し、そのうち保護ネットと接触している中空糸膜２の本数ｍ８を計測した結果、密着率ｍ８／Ｍ８が０．７６であった。 Thereafter, the hollow fiber membrane 2 was peeled off, and the contact state between the hollow fiber membrane 2 at the outermost periphery of the hollow fiber membrane bundle 3 and the protective net was observed in detail. The number M 8 of the hollow fiber membrane in the outermost peripheral portion of the hollow fiber membrane bundle 3 is measured, the results obtained by measuring the number m 8 of the hollow fiber membranes 2 which are in contact with them protective net, the adhesion rate m 8 / M 8 is It was 0.76.

１ 中空糸膜モジュール
３ 中空糸膜束
５ ハウジング
５ａ 環状凹凸部
５ｂ 外側領域
５ｃ 外部領域
６ 第１整流筒
６ａ フランジ
７ 第２整流筒
７ａ フランジ
８ 保護部材
１０，１１ キャップ
１０ａ，１１ａ 管路
１２ Ｏリング
１３ クランプ
２０，２１ 接着固定部
２０ａ 貫通孔
２１ａ 柱状部材
３０ 貫通穴
５１ 第１筒状部材
５１ａ 第１ノズル
５２ 第２筒状部材
５２ａ 第２ノズル
５３ 第３筒状部材 DESCRIPTION OF SYMBOLS 1 Hollow fiber membrane module 3 Hollow fiber membrane bundle 5 Housing 5a Annular uneven | corrugated | grooved part 5b Outer area | region 5c External area | region 6 1st rectification | straightening cylinder 6a Flange 7 2nd rectification | straightening cylinder 7a Flange 8 Protective member 10, 11 Cap 10a, 11a Ring 13 Clamp 20, 21 Adhesive fixing portion 20a Through hole 21a Columnar member 30 Through hole 51 First tubular member 51a First nozzle 52 Second tubular member 52a Second nozzle 53 Third tubular member

Claims (13)

一方の端部が閉塞され他方の端部が開口された複数の中空糸膜を束ねた中空糸膜束と、
側面に少なくとも１つのノズルを有した筒状体であり、前記中空糸膜の閉塞された端部および前記中空糸膜の開口された端部がそれぞれ前記筒状体の長手方向の両端側に向くように、前記中空糸膜束を収容するハウジングと、
前記中空糸膜の開口された端部側において、前記中空糸膜同士、および前記中空糸膜束と前記ハウジング内壁とを接着固定した第１の接着固定部と、
前記中空糸膜の閉塞された端部側において、前記中空糸膜同士、および前記中空糸膜束と前記ハウジング内壁とを接着固定し、前記中空糸膜束の外周において前記ハウジングの長手方向に平行な少なくとも１つの貫通孔を有する第２の接着固定部と、
前記第１の接着固定部から前記第２の接着固定部に向かって少なくとも所定の長さの端部領域、および前記第２の接着固定部から前記第１の接着固定部に向かって少なくとも所定の長さの端部領域の少なくとも一方において、前記中空糸膜束の外周面に密着した状態で該外周面を全周囲に亘って覆う保護部材とを備えたことを特徴とする外圧式中空糸膜モジュール。 A hollow fiber membrane bundle in which a plurality of hollow fiber membranes having one end closed and the other end opened are bundled;
A cylindrical body having at least one nozzle on a side surface, wherein the closed end of the hollow fiber membrane and the open end of the hollow fiber membrane are respectively directed to both ends in the longitudinal direction of the cylindrical body; A housing for housing the hollow fiber membrane bundle,
On the open end side of the hollow fiber membrane, a first adhesive fixing part that adhesively fixes the hollow fiber membranes and the hollow fiber membrane bundle and the inner wall of the housing;
On the closed end side of the hollow fiber membrane, the hollow fiber membranes and the hollow fiber membrane bundle and the inner wall of the housing are bonded and fixed, and the outer periphery of the hollow fiber membrane bundle is parallel to the longitudinal direction of the housing. A second adhesive fixing part having at least one through-hole,
An end region of at least a predetermined length from the first adhesive fixing portion toward the second adhesive fixing portion, and at least a predetermined portion from the second adhesive fixing portion toward the first adhesive fixing portion. An external pressure type hollow fiber membrane comprising: a protective member that covers the entire outer periphery of the bundle of hollow fiber membranes in close contact with the outer peripheral surface of the bundle of hollow fiber membranes in at least one of the end regions of the length module. 前記保護部材の内周の長さをL、前記中空糸膜の外径をd、前記保護部材に接触している前記中空糸膜の本数をmとしたとき、md／Lが０．９５以上であることを特徴とする請求項１記載の外圧式中空糸膜モジュール。   Md / L is 0.95 or more, where L is the inner circumferential length of the protective member, d is the outer diameter of the hollow fiber membrane, and m is the number of the hollow fiber membranes in contact with the protective member. The external pressure hollow fiber membrane module according to claim 1, wherein: 前記貫通孔が、前記中空糸膜束の外周面に隣接するように配置されていることを特徴とする請求項１または２記載の外圧式中空糸膜モジュール。   The external pressure type hollow fiber membrane module according to claim 1 or 2, wherein the through holes are arranged so as to be adjacent to an outer peripheral surface of the hollow fiber membrane bundle. 前記貫通孔の開口面積の和をA、開口された側の前記中空糸膜の中空部の総開口面積の和をBとしたとき、
A／Bが０．０５以上１以下であることを特徴とする請求項１から３いずれか１項記載の外圧式中空糸膜モジュール。 When the sum of the opening areas of the through holes is A, and the sum of the total opening areas of the hollow portions of the hollow fiber membrane on the opened side is B,
The external pressure type hollow fiber membrane module according to any one of claims 1 to 3, wherein A / B is 0.05 or more and 1 or less. 前記保護部材が、前記中空糸膜束の閉塞された側の端部領域および前記中空糸膜束の開口された側の端部領域の少なくとも一方にのみ設けられることを特徴とする請求項１から４いずれか１項記載の外圧式中空糸膜モジュール。   The protective member is provided only in at least one of an end region on the closed side of the hollow fiber membrane bundle and an end region on the open side of the hollow fiber membrane bundle. 4. The external pressure type hollow fiber membrane module according to any one of 4 above. 前記少なくとも１つのノズルが、前記ハウジングの少なくとも一方の端の近傍に形成され、
前記保護部材が、前記ノズルが形成された一端部側の端部領域に設けられることを特徴とする請求項１から５いずれか１項記載の外圧式中空糸膜モジュール。 The at least one nozzle is formed near at least one end of the housing;
The external pressure type hollow fiber membrane module according to any one of claims 1 to 5, wherein the protection member is provided in an end region on one end side where the nozzle is formed. 前記保護部材が、前記ノズルの前記ハウジング内側面側の開口よりも前記ハウジングの長手方向の中央位置側に延伸されて設けられていることを特徴とする請求項６記載の外圧式中空糸膜モジュール。   The external pressure type hollow fiber membrane module according to claim 6, wherein the protective member is provided so as to extend toward the center position side in the longitudinal direction of the housing from the opening on the inner side surface of the housing of the nozzle. . 前記保護部材が、ネット状の部材を筒状に形成したものであることを特徴とする請求項１から７いずれか１項記載の外圧式中空糸膜モジュール。   The external pressure type hollow fiber membrane module according to any one of claims 1 to 7, wherein the protective member is a net-like member formed in a cylindrical shape. 前記保護部材が、シート状の部材を筒状に形成したものであることを特徴とする請求項１から７いずれか１項記載の外圧式中空糸膜モジュール。   The external pressure type hollow fiber membrane module according to any one of claims 1 to 7, wherein the protection member is a sheet-like member formed in a cylindrical shape. 請求項１から９いずれか１項記載の外圧式中空糸膜モジュールの製造方法であって、
前記保護部材で包んだ前記中空糸膜束を前記ハウジング内に挿入した後、前記保護部材で包まれた中空糸膜束の外周面の外側に複数の柱状部材を挿入することによって前記中空糸膜束の外周面と前記保護部材とを密着させた状態とすることを特徴とする外圧式中空糸膜モジュールの製造方法。 It is a manufacturing method of the external pressure type hollow fiber membrane module according to any one of claims 1 to 9,
After inserting the hollow fiber membrane bundle wrapped with the protective member into the housing, the hollow fiber membrane is inserted by inserting a plurality of columnar members outside the outer peripheral surface of the hollow fiber membrane bundle wrapped with the protective member. A manufacturing method of an external pressure type hollow fiber membrane module, wherein the outer peripheral surface of the bundle and the protective member are brought into close contact with each other. 前記中空糸膜束の外周面と前記保護部材とを密着させた状態とした後、前記ハウジング内にポッティング材を注入することによって前記第２の接着固定部を形成し、該第２の接着固定部が形成された後、前記柱状部材を取り除くことによって前記貫通孔を形成することを特徴とする請求項１０記載の外圧式中空糸膜モジュールの製造方法。   After the outer peripheral surface of the hollow fiber membrane bundle and the protective member are brought into close contact with each other, the second adhesive fixing portion is formed by injecting a potting material into the housing, and the second adhesive fixing The method of manufacturing an external pressure type hollow fiber membrane module according to claim 10, wherein the through hole is formed by removing the columnar member after the portion is formed. 前記柱状部材の長手方向に直交する方向の断面形状が、円形または楕円形であることを特徴とする請求項１０または１１記載の外圧式中空糸膜モジュールの製造方法。   The method for producing an external pressure hollow fiber membrane module according to claim 10 or 11, wherein a cross-sectional shape in a direction orthogonal to the longitudinal direction of the columnar member is a circle or an ellipse. 前記柱状部材の先端部分がテーパー形状であることを特徴とする請求項１０から１２いずれか１項記載の外圧式中空糸膜モジュールの製造方法。   The manufacturing method of the external pressure type hollow fiber membrane module according to any one of claims 10 to 12, wherein a tip portion of the columnar member has a tapered shape.
JP2015237255A 2015-12-04 2015-12-04 External pressure type hollow fiber membrane module and manufacturing method thereof Active JP6725238B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2015237255A JP6725238B2 (en) 2015-12-04 2015-12-04 External pressure type hollow fiber membrane module and manufacturing method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2015237255A JP6725238B2 (en) 2015-12-04 2015-12-04 External pressure type hollow fiber membrane module and manufacturing method thereof

Publications (2)

Publication Number Publication Date
JP2017100105A true JP2017100105A (en) 2017-06-08
JP6725238B2 JP6725238B2 (en) 2020-07-15

Family

ID=59017224

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2015237255A Active JP6725238B2 (en) 2015-12-04 2015-12-04 External pressure type hollow fiber membrane module and manufacturing method thereof

Country Status (1)

Country Link
JP (1) JP6725238B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020059752A1 (en) 2018-09-20 2020-03-26 ダイセン・メンブレン・システムズ株式会社 Porous hollow fiber membrane
CN114425240A (en) * 2020-10-29 2022-05-03 旭化成株式会社 External pressure type hollow fiber membrane module and method for manufacturing same
CN114867547A (en) * 2019-12-19 2022-08-05 旭化成株式会社 Hollow fiber membrane module and method for producing same
CN115430227A (en) * 2021-07-29 2022-12-06 台湾积体电路制造股份有限公司 External air treatment device in semiconductor manufacturing factory and method for purifying air by using external air treatment device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09220446A (en) * 1996-02-15 1997-08-26 Asahi Chem Ind Co Ltd External pressure type hollow yarn membrane module
WO2008035593A1 (en) * 2006-09-19 2008-03-27 Toray Industries, Inc. Hollow fiber membrane module
JP2012045453A (en) * 2010-08-24 2012-03-08 Asahi Kasei Chemicals Corp Hollow fiber membrane module and filtration method
JP2012205981A (en) * 2011-03-29 2012-10-25 Toray Ind Inc Hollow fiber membrane module

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09220446A (en) * 1996-02-15 1997-08-26 Asahi Chem Ind Co Ltd External pressure type hollow yarn membrane module
WO2008035593A1 (en) * 2006-09-19 2008-03-27 Toray Industries, Inc. Hollow fiber membrane module
JP2012045453A (en) * 2010-08-24 2012-03-08 Asahi Kasei Chemicals Corp Hollow fiber membrane module and filtration method
JP2012205981A (en) * 2011-03-29 2012-10-25 Toray Ind Inc Hollow fiber membrane module

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020059752A1 (en) 2018-09-20 2020-03-26 ダイセン・メンブレン・システムズ株式会社 Porous hollow fiber membrane
CN114867547A (en) * 2019-12-19 2022-08-05 旭化成株式会社 Hollow fiber membrane module and method for producing same
CN114425240A (en) * 2020-10-29 2022-05-03 旭化成株式会社 External pressure type hollow fiber membrane module and method for manufacturing same
CN115430227A (en) * 2021-07-29 2022-12-06 台湾积体电路制造股份有限公司 External air treatment device in semiconductor manufacturing factory and method for purifying air by using external air treatment device

Also Published As

Publication number Publication date
JP6725238B2 (en) 2020-07-15

Similar Documents

Publication Publication Date Title
KR102067748B1 (en) Hollow fiber cartridges and components and methods of their construction
JP6276037B2 (en) Hollow fiber membrane module and filtration method
JP6725238B2 (en) External pressure type hollow fiber membrane module and manufacturing method thereof
US10350549B2 (en) Hollow fiber membrane module and method for manufacturing hollow fiber membrane module
WO2017131126A1 (en) Hollow fiber membrane module and method for producing hollow fiber membrane module
JP6853836B2 (en) Hollow fiber membrane module and filtration method
JP6751818B2 (en) Hollow fiber membrane module and filtration method
US20090301959A1 (en) Hollow Fibers, A Method of Manufacturing a Hollow Fiber Bundle, A Cylindrical Module of Hollow Fiber Membrane, and an Immersion Type Module of Hollow Fiber Membrane
JP5811738B2 (en) Method for repairing hollow fiber membrane module and hollow fiber membrane module
JP2009018283A (en) Hollow fiber membrane module and manufacturing method thereof
JP5291530B2 (en) Hollow fiber membrane module and manufacturing method thereof
WO2013146821A1 (en) Hollow fiber membrane module
JP2017039122A (en) Hollow fiber membrane module
JP2022074103A (en) External pressure type hollow fiber membrane module and production method therefor
JP4343522B2 (en) Blood treatment equipment
JP2023180121A (en) External pressure type hollow fiber membrane module
JP2007090309A (en) Hollow fiber bundle, method for producing the same, tubular hollow fiber membrane module, and immersion type hollow fiber membrane module
JP6628352B2 (en) Hollow fiber membrane module
JP7510344B2 (en) Hollow fiber membrane module, manufacturing method for hollow fiber membrane module, and filtration method
JP2002066264A (en) Filtration module
JP2015110198A (en) Module unit

Legal Events

Date Code Title Description
A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A712

Effective date: 20160401

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20160516

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20181130

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20190729

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20190904

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20191029

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20200226

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20200422

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20200603

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20200625

R150 Certificate of patent or registration of utility model

Ref document number: 6725238

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150