JP2003236348A - Hollow fiber membrane module and hollow fiber membrane module unit - Google Patents
Hollow fiber membrane module and hollow fiber membrane module unitInfo
- Publication number
- JP2003236348A JP2003236348A JP2002042217A JP2002042217A JP2003236348A JP 2003236348 A JP2003236348 A JP 2003236348A JP 2002042217 A JP2002042217 A JP 2002042217A JP 2002042217 A JP2002042217 A JP 2002042217A JP 2003236348 A JP2003236348 A JP 2003236348A
- Authority
- JP
- Japan
- Prior art keywords
- hollow fiber
- fiber membrane
- sheet
- protective member
- membrane module
- 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
Links
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、液体の濾過等に好
適に利用し得る中空糸膜モジュールに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow fiber membrane module which can be suitably used for liquid filtration and the like.
【０００２】[0002]
【従来の技術】中空糸膜モジュールは、無菌水、飲料
水、高純度水等の製造、或いは空気の浄化等、広範囲な
分野で使用されており、近年ではこれらの精密濾過用途
に加えて下水処理場における二次処理、三次処理や、浄
化槽における固液分離、産業廃水中のＳＳ成分（懸濁物
質）の固液分離等のように、高汚濁性水の処理用途への
適用もなされつつある。2. Description of the Related Art Hollow fiber membrane modules have been used in a wide range of fields such as production of sterile water, drinking water, high-purity water, etc., or air purification. In recent years, in addition to these microfiltration applications, sewage While being applied to highly polluted water treatment applications such as secondary and tertiary treatments at treatment plants, solid-liquid separation in septic tanks, solid-liquid separation of SS components (suspended substances) in industrial wastewater, etc. is there.
【０００３】高汚濁性水濾過の用途に適した中空糸膜モ
ジュールとしては、特開平４−３３４５２９号公報や特
開平５−２３５５０号公報、特開平１１−１７９１６２
号公報、特開２０００−２２９２２５号公報等には、ハ
ウジング内部にシート状の中空糸膜束の端部を収容し、
固定用樹脂を用いて固定してなる中空糸膜モジュールが
開示されている。これらの中空糸膜モジュールの膜面に
対し、被処理液の流れや気泡を当てて洗浄を行いながら
濾過を行うと、膜面が閉塞することを防ぎつつ、長期間
濾過を行うことができる。Hollow fiber membrane modules suitable for use in highly polluted water filtration are disclosed in JP-A-4-334529, JP-A-5-23550, and JP-A-11-179162.
Japanese Patent Laid-Open No. 2000-229225, etc., accommodates an end portion of a sheet-shaped hollow fiber membrane bundle inside a housing,
A hollow fiber membrane module fixed by using a fixing resin is disclosed. If filtration is performed on the membrane surface of these hollow fiber membrane modules while applying a flow of liquid to be treated or air bubbles to the membrane surface, filtration can be performed for a long period of time while preventing clogging of the membrane surface.
【０００４】これら中空糸膜モジュールにおいて、中空
糸膜固定用の樹脂と中空糸膜との境となる中空糸膜縁部
で破断が発生しやすい。これらの破断は、高汚濁性水濾
過時に、中空糸膜の揺動や弛緩することによる中空糸膜
の折れ曲がりから起こる事が多い。In these hollow fiber membrane modules, breakage easily occurs at the edge of the hollow fiber membrane, which is the boundary between the hollow fiber membrane fixing resin and the hollow fiber membrane. These breaks often occur due to bending of the hollow fiber membrane due to rocking and relaxation of the hollow fiber membrane during filtration of highly polluted water.
【０００５】シート状中空糸膜を用いた中空糸膜モジュ
ールに対し、被処理液や気泡の流れを当てて洗浄を行う
にあたっては、中空糸膜の繊維軸方向に沿って被処理液
や気泡の流れを当てると、中空糸膜の繊維軸に直交する
方向に流れを当てる場合と比較して、中空糸膜の固定部
分に発生する応力は小さくできる。When a hollow fiber membrane module using a sheet-shaped hollow fiber membrane is washed by applying a flow of liquid to be treated or air bubbles, the liquid to be treated or air bubbles are removed along the fiber axis direction of the hollow fiber membrane. When the flow is applied, the stress generated in the fixed portion of the hollow fiber membrane can be reduced as compared with the case where the flow is applied in the direction orthogonal to the fiber axis of the hollow fiber membrane.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、中空糸
膜の繊維軸方向に沿って被処理液や気泡の流れを当てる
場合、シート状中空糸膜の繊維軸に直交する方向におい
て最端部となる部位では、流れに対する抵抗が少ないた
めに、中央部よりも強い流れが生じることになり、その
結果最端部に位置する中空糸膜が破損しやすくなるとい
う問題がある。However, when the liquid to be treated or the flow of air bubbles is applied along the fiber axis direction of the hollow fiber membrane, it becomes the most end portion in the direction orthogonal to the fiber axis of the sheet-like hollow fiber membrane. Since the resistance to the flow is small at the portion, a stronger flow is generated than at the central portion, and as a result, there is a problem that the hollow fiber membrane located at the end portion is easily damaged.
【０００７】中空糸膜の破断や折損を防止する手段とし
て、例えば特開２０００−２２９２２５号公報には、中
空糸膜束の、ポッティング剤により固定される表面の、
ポッティング剤により固定される部分の縁部を少なくと
も含む箇所に、弾性を有する応力緩和部材が設ける方法
が記載されている。しかしながら、特開２０００−２２
９２２５号公報に記載の方法は、中空糸膜の固定部分近
傍に発生する応力を緩和することを目的としており、応
力の発生そのものを抑制することに関する考察はされて
いない。As a means for preventing breakage or breakage of the hollow fiber membrane, for example, in Japanese Patent Laid-Open No. 2000-229225, the surface of the bundle of hollow fiber membranes fixed by a potting agent is used.
There is described a method of providing a stress relaxation member having elasticity at a portion including at least an edge portion of a portion fixed by a potting agent. However, JP-A-2000-22
The method described in Japanese Patent No. 9225 aims to relieve the stress generated in the vicinity of the fixed portion of the hollow fiber membrane, and no consideration is given to suppressing the generation of the stress itself.
【０００８】本発明者らは、上記課題を解決すべく検討
した結果、保護部材の形状を工夫することにより、中空
糸膜の折損が発生しにくい中空糸膜モジュールを見出
し、本発明を完成させた。As a result of studies to solve the above problems, the present inventors have found a hollow fiber membrane module in which breakage of the hollow fiber membrane is less likely to occur by devising the shape of the protective member, and completed the present invention. It was
【０００９】[0009]
【課題を解決するための手段】すなわち本発明の要旨
は、シート状中空糸膜の両端部が２つの相対するハウジ
ングに固定され、該中空糸膜の少なくとも一端の固定部
分近傍に、該中空糸膜の繊維軸方向に直交して該シート
状中空糸膜のシート面を覆うように保護部材が設けら
れ、該シート状中空糸膜の繊維軸に直交する方向におい
て、該シート面の端部側から中央部に向かって該保護部
材の厚さが薄くなるように構成されてなる中空糸膜モジ
ュール、である。That is, the gist of the present invention is that both ends of a sheet-shaped hollow fiber membrane are fixed to two opposing housings, and the hollow fiber membrane is provided near at least one fixed portion of the hollow fiber membrane. A protective member is provided so as to cover the sheet surface of the sheet-shaped hollow fiber membrane at right angles to the fiber axis direction of the membrane, and the end side of the sheet surface in the direction orthogonal to the fiber axis of the sheet-shaped hollow fiber membrane. Is a hollow fiber membrane module configured such that the thickness of the protective member becomes thinner from the center to the center.
【００１０】また、前記保護部材の最も厚い部位の厚さ
が、最も薄い部位の厚さの２倍以上であると、バブリン
グによる被処理液の流れを制御する効果が高く、好まし
い。また、前記中空糸膜の繊維軸方向から見て、前記保
護部材の最も薄い部位と最も厚い部位とを結ぶ線と、前
記シート面とがなす角度を５度以下とすると、被処理液
の流れに対する抵抗を押えつつ流れを制御することがで
きるため好ましい。Further, it is preferable that the thickness of the thickest part of the protective member is twice or more the thickness of the thinnest part because the effect of controlling the flow of the liquid to be treated by bubbling is high. When the angle between the sheet surface and the line connecting the thinnest part and the thickest part of the protective member as viewed from the fiber axis direction of the hollow fiber membrane is 5 degrees or less, the flow of the liquid to be treated is set. It is preferable because the flow can be controlled while suppressing the resistance to.
【００１１】また、前記シート状中空糸膜の繊維軸に直
交する方向において、前記シート状中空糸膜の端部から
中央部に向かって前記保護部材の幅が狭くなるようにす
ると、被処理液の流れを制御する効果がより高く、好ま
しい。また、前記中空糸膜の長さを２００ｍｍ〜２００
０ｍｍとすると、保護部材による保護効果と濾過効率が
共に優れているため好ましい。また、前記シート状中空
糸膜の繊維軸に直交する方向における長さを１００ｍｍ
〜１５００ｍｍとすると、取り扱い性に優れるため好ま
しい。また、前記シート状中空糸膜のシートの厚さを５
ｍｍ〜５０ｍｍとすると、保護部材による保護効果をよ
り顕著にできるため好ましい。また、前記シート状中空
糸膜を構成する中空糸膜の本数を２００〜４０００本と
すると、取り扱い性に優れるため好ましい。Further, in the direction orthogonal to the fiber axis of the sheet-shaped hollow fiber membrane, when the width of the protective member becomes narrower from the end portion to the central portion of the sheet-shaped hollow fiber membrane, the liquid to be treated is reduced. The effect of controlling the flow of is higher, which is preferable. In addition, the length of the hollow fiber membrane is 200 mm to 200
A thickness of 0 mm is preferable because both the protective effect of the protective member and the filtration efficiency are excellent. The length of the sheet-shaped hollow fiber membrane in the direction orthogonal to the fiber axis is 100 mm.
When it is set to ˜1500 mm, it is preferable because it is easy to handle. In addition, the sheet thickness of the sheet-shaped hollow fiber membrane is 5
It is preferable that the thickness is in the range of 50 mm to 50 mm because the protective effect of the protective member can be more remarkable. Further, it is preferable that the number of hollow fiber membranes constituting the sheet-shaped hollow fiber membrane is 200 to 4000, because the handling property is excellent.
【００１２】本発明の第二の要旨は、前記中空糸膜モジ
ュールを、横方向及び／又は縦方向に複数個並べて配置
してなる中空糸膜モジュールユニット、である。A second gist of the present invention is a hollow fiber membrane module unit in which a plurality of the hollow fiber membrane modules are arranged side by side in the horizontal direction and / or the vertical direction.
【００１３】ここで、前記中空糸膜の長手方向が鉛直方
向に配置されてなると、本発明による中空糸膜の破損防
止効果が顕著となる。また、前記保護部材が、前記相対
するハウジングのうち、上方に位置するハウジングの前
記固定部材近傍にのみ設けられていると、より少ない構
成部材で確実に中空糸膜の破損を防止することができ
る。Here, when the longitudinal direction of the hollow fiber membrane is arranged in the vertical direction, the effect of preventing breakage of the hollow fiber membrane according to the present invention becomes remarkable. Further, if the protective member is provided only in the vicinity of the fixing member of the housing located above among the facing housings, it is possible to reliably prevent breakage of the hollow fiber membrane with fewer constituent members. .
【００１４】[0014]
【発明の実施の形態】以下、本発明を詳しく説明する。
図１は、本発明の中空糸膜モジュールの一例を示す正面
図である。本発明の中空糸膜モジュール１は、複数の中
空糸膜３がシート状に並べられ、中空糸膜両端部が、２
つの相対するハウジング２に、固定部材４同士の間隔が
中空糸膜３の長さよりも短い間隔で固定されてなるもの
であり、中空糸膜３が若干の弛緩を持つように配置され
るため、洗浄性が良好となる。弛緩間隔としては、固定
部材４間距離の５％以下とすることが好ましく、３％以
下とすることがより好ましい。ハウジング２の少なくと
も一端には、図示しないがハウジング２に内包される処
理液通過のための内部路に連通し、外部に開口した配管
が設けられている。BEST MODE FOR CARRYING OUT THE INVENTION The present invention is described in detail below.
FIG. 1 is a front view showing an example of the hollow fiber membrane module of the present invention. In the hollow fiber membrane module 1 of the present invention, a plurality of hollow fiber membranes 3 are arranged in a sheet shape, and both ends of the hollow fiber membrane are 2
Since the fixing members 4 are fixed to the two housings 2 facing each other at an interval shorter than the length of the hollow fiber membrane 3, since the hollow fiber membranes 3 are arranged so as to have some relaxation, Good detergency. The relaxation interval is preferably 5% or less of the distance between the fixing members 4, and more preferably 3% or less. At least one end of the housing 2 is provided with a pipe (not shown) that communicates with an internal passage for passing a processing liquid contained in the housing 2 and opens to the outside.
【００１５】ここで、固定部材４の近傍に、中空糸膜の
繊維軸に直交し、シート状中空糸膜のシート面を覆うよ
うにして保護部材５を設ける。保護部材５は、中空糸膜
の固定部、即ち中空糸膜を接着固定の際に各中空糸膜間
に固定部材が浸透し、中空糸膜が接着固定されている部
分、において、中空糸膜の揺動により発生する中空糸膜
に対する曲げモーメントを緩和し、中空糸膜の破損を防
止する効果を果たす。Here, a protective member 5 is provided near the fixing member 4 so as to be orthogonal to the fiber axis of the hollow fiber membrane and cover the sheet surface of the sheet-shaped hollow fiber membrane. The protective member 5 is a hollow fiber membrane at a fixed portion of the hollow fiber membrane, that is, a portion where the hollow fiber membrane is adhered and fixed between the hollow fiber membranes when the hollow fiber membrane is adhesively fixed. The bending moment of the hollow fiber membrane caused by the swinging of the hollow fiber membrane is relaxed, and the hollow fiber membrane is prevented from being damaged.
【００１６】このとき、シート状中空糸膜の繊維軸に直
交する方向において、シート面の端部側から中央部に向
かって保護部材５の厚さが薄くなるように構成すると、
中空糸膜の繊維軸方向に向かって被処理液が流れるよう
にした際に、端部側に集中して被処理液が流れることを
防止できるため、端部に位置する中空糸膜に応力が集中
することを防止できる。At this time, in the direction orthogonal to the fiber axis of the sheet-shaped hollow fiber membrane, the thickness of the protective member 5 is reduced from the end side of the sheet surface toward the central portion,
When the liquid to be treated is allowed to flow in the fiber axis direction of the hollow fiber membrane, it is possible to prevent the liquid to be treated from being concentrated on the end side, so that stress is applied to the hollow fiber membranes located at the ends. You can prevent concentration.
【００１７】保護部材５は、ポリエステル、ポリエチレ
ン等、非分解性の有機高分子が好ましい。ここでいう非
分解性の材質とは、化学分解あるいは生分解性が起こり
にくい材質のことであり、活性汚泥等の被処理液内に浸
漬させても分解することなく、また、曲げモーメントを
緩和させる機能を保持している材質のことである。The protective member 5 is preferably a non-degradable organic polymer such as polyester or polyethylene. The non-degradable material referred to here is a material that does not easily undergo chemical decomposition or biodegradability, does not decompose even when immersed in a liquid to be treated such as activated sludge, and relaxes the bending moment. It is a material that retains the function of making it.
【００１８】保護部材５の種類は、編織布、不織布、フ
ィルム、発泡樹脂等の柔らかい部材が好ましく、シート
状中空糸膜の端部を、中空糸膜繊維軸に直交する方向の
シート幅全体に亘って覆うように配置する。The type of the protective member 5 is preferably a soft member such as a knitted fabric, a non-woven fabric, a film or a foamed resin, and the end portion of the sheet-shaped hollow fiber membrane is formed over the entire sheet width in the direction orthogonal to the fiber axis of the hollow fiber membrane. It is arranged so as to cover over.
【００１９】また、保護部材５の厚みは、あまり厚いと
複数の中空糸膜モジュールを並べて配置する際に邪魔に
なるため、最も厚い部分で１０ｍｍ以下とすることが好
ましく、６ｍｍ以下とすることがより好ましい。一方あ
まり薄いと中空糸膜の保護効果が不十分となることか
ら、最も薄い部分で０．５ｍｍ以上とすることが好まし
く、１ｍｍ以上とすることがより好ましい。If the protective member 5 is too thick, it will be an obstacle when arranging a plurality of hollow fiber membrane modules side by side. Therefore, the thickest portion is preferably 10 mm or less, and preferably 6 mm or less. More preferable. On the other hand, if it is too thin, the protective effect of the hollow fiber membrane will be insufficient, so the thickness is preferably 0.5 mm or more at the thinnest portion, and more preferably 1 mm or more.
【００２０】保護部材５は、シート状中空糸膜の片面に
配置するだけでも本発明の効果は一応得られるものの、
シート状中空糸膜を挟んで両面に配置することが好まし
い。Although the protective member 5 can be provided with the effect of the present invention only by arranging it on one side of the sheet-shaped hollow fiber membrane,
It is preferable to dispose the sheet-shaped hollow fiber membranes on both sides of the membrane.
【００２１】保護部材５を配置する際は、中空糸膜３を
固定部材４で固定後、保護部材５をシート面に接着す
る、中空糸膜３と同時に保護部材５を固定部材４で固定
する、等の方法により配置することができる。When arranging the protective member 5, the hollow fiber membrane 3 is fixed by the fixing member 4 and then the protective member 5 is adhered to the sheet surface. The protective member 5 is fixed by the fixing member 4 at the same time as the hollow fiber membrane 3. , And the like.
【００２２】保護部材５は、中空糸膜３の端部におい
て、固定部材４が含浸し、這い上がった部分の先端部は
全て覆うようにして配置することが好ましい。先端部が
覆われている限り、根元部で多少露出する中空糸膜があ
っても構わない。The protective member 5 is preferably arranged so that the end of the hollow fiber membrane 3 is impregnated with the fixing member 4 and covers the entire tip of the raised portion. As long as the tip is covered, there may be a hollow fiber membrane that is exposed to some extent at the root.
【００２３】保護部材５は、最も厚い部位の厚さが、最
も薄い部位の厚さの２倍以上となるようにすると、中空
糸膜シートの端部側に集中して被処理液が流れることを
より効果的に防止できるため好ましい。When the thickness of the thickest part of the protective member 5 is twice or more the thickness of the thinnest part, the liquid to be treated flows concentratedly on the end side of the hollow fiber membrane sheet. Is more preferable and can be effectively prevented.
【００２４】図２は、図１の中空糸膜モジュールのハウ
ジング部のＡ−Ａ’断面における断面図である。中空糸
膜の繊維軸方向から見て、保護部材５のもっとも薄い部
位と最も厚い部位とを結ぶ線と、シート面とがなす角度
は、図２に示す角度θに相当するが、これを５度以下と
すると、保護部材５の厚い部位が被処理液の流れに対し
て過度に出っ張ることがなく、従って被処理液の流れに
対する抵抗を押えつつ保護効果を達成することができる
ため好ましい。このとき、保護部材５の最も厚い部位か
ら最も薄い部位までは、厚みを直線的に変化させても良
いし、曲線的に変化させても良い。FIG. 2 is a sectional view taken along the line AA 'of the housing portion of the hollow fiber membrane module shown in FIG. The angle formed by the sheet surface and the line connecting the thinnest part and the thickest part of the protective member 5 when viewed from the fiber axis direction of the hollow fiber membrane corresponds to the angle θ shown in FIG. It is preferable that the thickness is less than or equal to the degree, because the thick portion of the protective member 5 does not overhang to the flow of the liquid to be treated, and therefore the protection effect can be achieved while suppressing the resistance to the flow of the liquid to be treated. At this time, the thickness may be changed linearly or curvedly from the thickest part to the thinnest part of the protective member 5.
【００２５】保護部材５の幅は、全体を同じ幅とするこ
ともできるが、シート状中空糸膜の繊維軸に直交する方
向において、シート状中空糸膜の端部から中央部に向か
って保護部材５の幅が狭くなるようにすると、中空糸膜
シートの端部側に集中して被処理液が流れることをより
効果的に防止できるため好ましい。保護部材５の幅を変
化させる場合、図３に示すように、固定部材側方向の保
護部材の端部は固定部材と平行にし、その反対側の保護
部材端部が固定部材に対し斜めになるようにする。The protective member 5 may have the same width as a whole, but in the direction orthogonal to the fiber axis of the sheet-shaped hollow fiber membrane, the protective member 5 is protected from the end portion to the central portion of the sheet-shaped hollow fiber membrane. It is preferable to make the width of the member 5 narrower because it is possible to more effectively prevent the liquid to be treated from flowing concentratedly on the end side of the hollow fiber membrane sheet. When changing the width of the protective member 5, as shown in FIG. 3, the end of the protective member in the direction of the fixed member is parallel to the fixed member, and the end of the protective member on the opposite side is oblique to the fixed member. To do so.
【００２６】保護部材５の幅は、あまり狭いと中空糸膜
の保護効果が小さいため、最も狭い部位で２０ｍｍ以上
とすることが好ましく、２５ｍｍ以上とすることがより
好ましい。一方広すぎると中空糸膜面を覆って濾過を阻
害することから、最も広い部位で５０ｍｍ以下とするこ
とが好ましく、４０ｍｍ以下とすることがより好まし
い。If the width of the protective member 5 is too narrow, the effect of protecting the hollow fiber membrane is small. Therefore, the width of the narrowest portion is preferably 20 mm or more, more preferably 25 mm or more. On the other hand, if it is too wide, the surface of the hollow fiber membrane is covered and filtration is hindered. Therefore, the width is preferably 50 mm or less at the widest part, and more preferably 40 mm or less.
【００２７】本発明に用いられる中空糸膜は、中空糸膜
を単にひき揃えたものでもよいが、中空糸膜モジュール
の加工性の面から好適な形態としては、中空糸膜束が枷
枠体に多条に巻き取られた巻き状物や、中空糸膜を緯糸
として用いて編み地としたもの、またはこの編み地を数
枚積層するか、編み地を切断せずに適当な長さに折り畳
み重ねて積層体としたようなものが挙げられる。積層体
とする場合の編み地の積層（折り畳み）枚数は、編み地
の厚さ、すなわち中空糸膜の太さや編み地を編成する際
の中空糸膜の合糸本数によっても変化するが、通常は１
０枚程度までが好ましい。The hollow fiber membrane used in the present invention may be a hollow fiber membrane that is simply drawn. However, in view of the processability of the hollow fiber membrane module, the preferred form is a hollow fiber membrane bundle with a straddle frame. A multi-threaded wound material, a hollow fiber membrane used as a weft to form a knitted fabric, or several layers of this knitted fabric, or to an appropriate length without cutting the knitted fabric. An example is a product that is folded and stacked to form a laminated body. The number of layers (folding) of the knitted fabric in the case of forming a laminated body varies depending on the thickness of the knitted fabric, that is, the thickness of the hollow fiber membrane and the number of yarns of the hollow fiber membrane when knitting the knitted fabric. Is 1
Up to about 0 sheets is preferable.
【００２８】中空糸膜の長さは、長くなるほど揺れ動き
やすくなるため、本発明の保護部材の効果がより顕著と
なるが、長すぎると濾過効率が低下するため、２００ｍ
ｍ〜２０００ｍｍが好ましく、５００ｍｍ〜１５００ｍ
ｍがより好ましい。また、中空糸膜の繊維軸に直交する
方向における長さは、１００ｍｍ〜１５００ｍｍが取扱
い性に優れるため好ましく、３００ｍｍ〜１０００ｍｍ
がより好ましい。As the length of the hollow fiber membrane becomes easier to swing as it becomes longer, the effect of the protective member of the present invention becomes more remarkable, but if it is too long, the filtration efficiency is lowered, and therefore 200 m.
m to 2000 mm is preferable, 500 mm to 1500 m
m is more preferred. In addition, the length of the hollow fiber membrane in the direction orthogonal to the fiber axis is preferably 100 mm to 1500 mm because of its excellent handleability, and 300 mm to 1000 mm.
Is more preferable.
【００２９】本発明で用いられるシート状中空糸膜は、
シートの厚さが厚すぎると、シートの内側部に存在する
中空糸膜に対し、保護部材の保護効果が及び難くなるた
め、５０ｍｍ以下とすることが好ましく、４０ｍｍ以下
とすることがより好ましい。一方、薄すぎると膜の集積
効率が低下することから、５ｍｍ以上とすることが好ま
しく、１０ｍｍ以上とすることがより好ましい。The sheet-shaped hollow fiber membrane used in the present invention is
If the thickness of the sheet is too thick, it becomes difficult for the protective member to protect the hollow fiber membranes present inside the sheet, so the thickness is preferably 50 mm or less, and more preferably 40 mm or less. On the other hand, if it is too thin, the efficiency of film integration is reduced, so that the thickness is preferably 5 mm or more, and more preferably 10 mm or more.
【００３０】本発明で用いられるシート状中空糸膜を構
成する中空糸膜の本数は、少なすぎるとモジュールあた
りの膜面積が小さく効率が悪いことから、２００本以上
とすることが好ましく、４００本以上とすることがより
好ましい。一方多すぎると取り扱い性が悪化し、気泡等
による洗浄性も低下する傾向にあることから、４０００
本以下とすることが好ましく、３０００本以下とするこ
とがより好ましい。If the number of hollow fiber membranes constituting the sheet-shaped hollow fiber membrane used in the present invention is too small, the membrane area per module is small and the efficiency is poor. It is more preferable to set it as above. On the other hand, if the amount is too large, the handling property tends to deteriorate, and the cleaning property due to air bubbles and the like tends to decrease.
The number is preferably not more than this number, more preferably not more than 3000.
【００３１】本発明で用いられる中空糸膜の材質は、ポ
リスルホン系樹脂、ポリアクリロニトリル、セルロース
誘導体、ポリエチレンやポリプロピレンなどのポリオレ
フィン、ポリフッ化ビニリデンやポリテトラフルオロエ
チレンなどのフッ素系樹脂、ポリアミド、ポリエステ
ル、ポリメタクリレート、ポリアクリレートなどを用い
ることができる。また、これらの樹脂の共重合体や一部
に置換基を導入したものであっても良い。さらに、２種
以上の樹脂を混合したものであっても良い。これらの素
材のなかで、ポリフッ化ビニリデン、ポリスルホン、ポ
リアクリロニトリルは、比較的強度が弱いため、本発明
の保護部材の効果がより顕著に発揮される。The material of the hollow fiber membrane used in the present invention is polysulfone resin, polyacrylonitrile, cellulose derivative, polyolefin such as polyethylene or polypropylene, fluorine resin such as polyvinylidene fluoride or polytetrafluoroethylene, polyamide, polyester, Polymethacrylate, polyacrylate, etc. can be used. Further, it may be a copolymer of these resins or one in which a substituent is introduced. Further, it may be a mixture of two or more kinds of resins. Among these materials, polyvinylidene fluoride, polysulfone, and polyacrylonitrile have comparatively weak strength, so that the effect of the protective member of the present invention is more remarkably exhibited.
【００３２】なお、濾過膜として使用可能な中空糸膜で
あれば、その孔径、空孔率、膜厚、外径等は特に限定さ
れるものではないが、外径は２０〜２０００μｍ、孔径
は０．００１〜５μｍ、空孔率は２０〜９０％、膜厚は
５〜３００μｍの範囲が好適に用いられる。The hollow fiber membrane that can be used as a filtration membrane is not particularly limited in its pore diameter, porosity, membrane thickness, outer diameter, etc., but its outer diameter is 20 to 2000 μm, and its pore diameter is A range of 0.001 to 5 μm, a porosity of 20 to 90%, and a film thickness of 5 to 300 μm is preferably used.
【００３３】本発明の中空糸膜モジュールに用いられる
ハウジング材質としては、機械的強度および耐久性を有
するものであればよく、例えばポリカーボネート、ポリ
スルホン、ポリオレフィン、ＰＶＣ（ポリ塩化ビニ
ル）、アクリル樹脂、ＡＢＳ樹脂、変成ＰＰＥ（ポリフ
ェニレンエーテル）等を用いることができる。使用後に
焼却処理が必要な場合には、燃焼により有毒ガスを出さ
ずに、完全燃焼させることのできるポリオレフィン等の
炭化水素系の樹脂を材質とするのが好ましい。The housing material used in the hollow fiber membrane module of the present invention may be any one having mechanical strength and durability, such as polycarbonate, polysulfone, polyolefin, PVC (polyvinyl chloride), acrylic resin, ABS. Resin, modified PPE (polyphenylene ether), etc. can be used. When incineration is required after use, it is preferable to use a hydrocarbon resin such as polyolefin that can be completely burned without producing toxic gas by burning.
【００３４】本発明の中空糸膜モジュールに用いられる
固定部材４としては、エポキシ樹脂、不飽和ポリエステ
ル樹脂、ポリウレタン樹脂、シリコン系充填材、各種ホ
ットメルト樹脂等を用いることができ、適宜選定するこ
とが可能である。また、固化前の固定部材の粘度は、固
定部材が、複数の中空糸膜間に含浸しやすくなることか
ら、固化前の固定部材の粘度は５００〜５０００ｍＰａ
・ｓが好ましく、より好ましくは２０００〜３０００ｍ
Ｐａ・ｓの範囲である。As the fixing member 4 used in the hollow fiber membrane module of the present invention, an epoxy resin, an unsaturated polyester resin, a polyurethane resin, a silicon-based filler, various hot-melt resins, etc. can be used and can be selected appropriately. Is possible. The viscosity of the fixing member before solidification is such that the fixing member easily impregnates between the plurality of hollow fiber membranes, and therefore the viscosity of the fixing member before solidification is 500 to 5000 mPas.
・ S is preferable, and more preferably 2000 to 3000 m.
The range is Pa · s.
【００３５】また、固定の際に遠心力を利用する方法
や、固定部材が中空糸膜束を構成する複数の中空糸膜の
間に十分に行き渡るよう、固定前に中空糸膜束にエアー
等を吹き付けることで、中空糸膜束を開繊する方法を併
用することがより好ましい。In addition, a method of utilizing centrifugal force at the time of fixing, or air or the like to the hollow fiber membrane bundle before fixing so that the fixing member is sufficiently spread among a plurality of hollow fiber membranes constituting the hollow fiber membrane bundle. It is more preferable to use a method of opening the hollow fiber membrane bundle by spraying.
【００３６】ハウジング内で中空糸膜を、その端部の開
口面を保ちつつ、開口面が内部路に連通した状態で固定
する方法としては、あらかじめ中空糸膜の端部をカット
して開口し、中空糸膜の端部の開口状態を保ったまま固
定部材を注入する方法や、中空糸膜の端部をあらかじめ
カットしていない中空糸膜束の端部をハウジング内に挿
入し、中空糸膜の端部をすべて覆うようにハウジングの
内部まで固定部材を注入し、固化した後、固定部材を中
空糸膜の端部と一緒にカットし、中空糸膜端部を開口さ
せる方法などを用いることができる。As a method for fixing the hollow fiber membrane in the housing while keeping the open surface of the end portion in a state where the open surface communicates with the internal passage, the hollow fiber membrane is preliminarily cut and opened. , A method of injecting a fixing member while maintaining the open state of the end of the hollow fiber membrane, or inserting the end of the hollow fiber membrane bundle in which the end of the hollow fiber membrane is not precut into the housing, The fixing member is injected into the housing so as to cover all the end portions of the membrane, and after solidifying, the fixing member is cut together with the end portion of the hollow fiber membrane to open the end portion of the hollow fiber membrane. be able to.
【００３７】前述した本発明の中空糸膜モジュールを横
方向及び／又は縦方向に複数個並べて配置した中空糸膜
モジュールユニットは、濾過量を大きくできると共に、
取り扱い性に優れている。The hollow fiber membrane module unit in which a plurality of the hollow fiber membrane modules of the present invention described above are arranged side by side in the transverse direction and / or the longitudinal direction can increase the filtration amount and
Excellent handleability.
【００３８】また、中空糸膜の配置方向を、繊維軸が鉛
直方向を向くように配置すると、中空糸膜の下方よりバ
ブリングを行うことによって、容易に中空糸膜繊維軸方
向に沿った被処理液の流れを形成でき、中空糸膜のシー
ト面に平行かつ繊維軸に直交する方向に中空糸膜が揺動
し難くなるため、本発明の保護部材の保護効果がより顕
著に発揮される。Further, when the hollow fiber membrane is arranged so that the fiber axis is oriented in the vertical direction, bubbling is performed from below the hollow fiber membrane to facilitate the treatment along the fiber axis direction of the hollow fiber membrane. Since the liquid flow can be formed and the hollow fiber membrane is less likely to swing in the direction parallel to the sheet surface of the hollow fiber membrane and orthogonal to the fiber axis, the protective effect of the protective member of the present invention is more significantly exhibited.
【００３９】保護部材は、中空糸膜の両端部に設けても
構わないが、中空糸膜の配置方向を繊維軸が鉛直方向を
向くように配置する場合、保護部材は上部に位置するハ
ウジング側の中空糸膜固定部分近傍のみに設けると、よ
り少ない部材で保護効果を達成することができるため好
ましい。The protective member may be provided at both ends of the hollow fiber membrane, but when the hollow fiber membrane is arranged so that the fiber axis is in the vertical direction, the protective member is located on the upper housing side. It is preferable to provide it only in the vicinity of the hollow fiber membrane fixing portion, because the protective effect can be achieved with fewer members.
【００４０】[0040]
【発明の効果】本発明の中空糸膜モジュールによれば、
シート状中空糸膜の少なくとも一端の固定部分近傍に、
中空糸膜の繊維軸方向に直交して、シート状中空糸膜の
シート面を覆うように保護部材を設けているため、中空
糸膜の揺動により発生する中空糸膜に対する曲げモーメ
ントを緩和し、中空糸膜の破損を防止する効果を果たす
ことができる。加えて、シート状中空糸膜の繊維軸に直
交する方向において、シート面の端部側から中央部に向
かって保護部材の厚さが薄くなるように構成しているた
め、中空糸膜の繊維軸方向に向かって被処理液が流れる
際に、端部側に集中して被処理液が流れることを防止で
きるため、端部に位置する中空糸膜に応力が集中するこ
とを防止できる。また、本発明の中空糸膜モジュール
を、横方向及び／又は縦方向に複数個並べた中空糸膜モ
ジュールユニットは、濾過量を大きくできると共に、取
り扱い性に優れている。According to the hollow fiber membrane module of the present invention,
In the vicinity of the fixed portion of at least one end of the sheet-shaped hollow fiber membrane,
Since the protective member is provided so as to cover the sheet surface of the sheet-shaped hollow fiber membrane at right angles to the fiber axis direction of the hollow fiber membrane, the bending moment to the hollow fiber membrane caused by the swing of the hollow fiber membrane is relaxed. The effect of preventing breakage of the hollow fiber membrane can be achieved. In addition, in the direction orthogonal to the fiber axis of the sheet-shaped hollow fiber membrane, since the thickness of the protective member is reduced from the end side of the sheet surface toward the central portion, the fiber of the hollow fiber membrane When the liquid to be treated flows in the axial direction, it is possible to prevent the liquid to be treated from concentrating on the end portion side, so that stress can be prevented from concentrating on the hollow fiber membranes located at the end portions. Further, the hollow fiber membrane module unit in which a plurality of hollow fiber membrane modules of the present invention are arranged in the horizontal direction and / or the vertical direction can increase the filtration amount and is excellent in handleability.
【図１】本発明の中空糸膜モジュールの一例を示す正面
図である。FIG. 1 is a front view showing an example of a hollow fiber membrane module of the present invention.
【図２】図１の中空糸膜モジュールのハウジングＡ−
Ａ’断面における断面図である。FIG. 2 is a housing A- of the hollow fiber membrane module of FIG.
It is sectional drawing in an A'section.
【図３】本発明の中空糸膜モジュールの別の一例を示す
正面図である。FIG. 3 is a front view showing another example of the hollow fiber membrane module of the present invention.
１ 中空糸膜モジュール ２ ハウジング ３ 中空糸膜 ４ 固定部材 ５ 保護部材 1 Hollow fiber membrane module 2 housing 3 hollow fiber membranes 4 fixing members 5 Protective material
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中原 禎仁 愛知県名古屋市東区砂田橋四丁目１番60号 三菱レイヨン株式会社商品開発研究所内 (72)発明者 取違 哲也 愛知県名古屋市東区砂田橋四丁目１番60号 三菱レイヨン株式会社商品開発研究所内 Ｆターム(参考） 4D006 GA07 HA12 JA30A MA01 MA40 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Sadahito Nakahara 4-1-1 Sunadabashi, Higashi-ku, Nagoya-shi, Aichi Mitsubishi Rayon Co., Ltd. Product Development Laboratory (72) Inventor Tetsuya Tetsuya 4-1-1 Sunadabashi, Higashi-ku, Nagoya-shi, Aichi Mitsubishi Rayon Co., Ltd. Product Development Laboratory F-term (reference) 4D006 GA07 HA12 JA30A MA01 MA40
Claims (11)
するハウジングに固定され、該中空糸膜の少なくとも一
端の固定部分近傍に、該中空糸膜の繊維軸方向に直交し
て該シート状中空糸膜のシート面を覆うように保護部材
が設けられ、該シート状中空糸膜の繊維軸に直交する方
向において、該シート面の端部側から中央部に向かって
該保護部材の厚さが薄くなるように構成されてなる中空
糸膜モジュール。1. A sheet-shaped hollow fiber membrane having both ends fixed to two housings facing each other, and at least near one fixed portion of the hollow fiber membrane, the sheet being orthogonal to the fiber axis direction of the hollow fiber membrane. A protective member is provided so as to cover the sheet surface of the sheet-shaped hollow fiber membrane, and the thickness of the protective member is from the end side of the sheet surface toward the central portion in the direction orthogonal to the fiber axis of the sheet-shaped hollow fiber membrane. A hollow fiber membrane module configured to be thin.
最も薄い部位の厚さの２倍以上である請求項１記載の中
空糸膜モジュール。2. The thickness of the thickest part of the protective member is
The hollow fiber membrane module according to claim 1, wherein the thickness is twice or more the thickness of the thinnest portion.
記保護部材の最も薄い部位と最も厚い部位とを結ぶ線
と、前記シート面とがなす角度が５度以下である請求項
１又は２記載の中空糸膜モジュール。3. The angle formed by the line connecting the thinnest portion and the thickest portion of the protective member and the sheet surface is 5 degrees or less when viewed from the fiber axis direction of the hollow fiber membrane. Alternatively, the hollow fiber membrane module according to item 2.
る方向において、前記シート状中空糸膜の端部から中央
部に向かって前記保護部材の幅が狭くなるように構成さ
れてなる請求項１〜３いずれか一項に記載の中空糸膜モ
ジュール。4. The protective member is configured such that the width of the protective member becomes narrower from an end portion to a central portion of the sheet-shaped hollow fiber membrane in a direction orthogonal to a fiber axis of the sheet-shaped hollow fiber membrane. Item 5. The hollow fiber membrane module according to any one of items 1 to 3.
００ｍｍである請求項１〜４いずれか一項に記載の中空
糸膜モジュール。5. The hollow fiber membrane has a length of 200 mm to 20.
It is 00 mm, The hollow fiber membrane module as described in any one of Claims 1-4.
る方向における長さが１００ｍｍ〜１５００ｍｍである
請求項１〜５いずれか一項に記載の中空糸膜モジュー
ル。6. The hollow fiber membrane module according to claim 1, wherein a length of the sheet-shaped hollow fiber membrane in a direction orthogonal to a fiber axis is 100 mm to 1500 mm.
５ｍｍ〜５０ｍｍである請求項１〜６いずれか一項に記
載の中空糸膜モジュール。7. The hollow fiber membrane module according to claim 1, wherein the sheet-shaped hollow fiber membrane has a sheet thickness of 5 mm to 50 mm.
膜の本数が２００〜４０００本である請求項１〜７いず
れか一項に記載の中空糸膜モジュール。8. The hollow fiber membrane module according to claim 1, wherein the number of hollow fiber membranes constituting the sheet-shaped hollow fiber membrane is 200 to 4000.
糸膜モジュールを、横方向及び／又は縦方向に複数個並
べて配置してなる中空糸膜モジュールユニット。9. A hollow fiber membrane module unit comprising a plurality of the hollow fiber membrane modules according to claim 1 arranged side by side in a horizontal direction and / or a vertical direction.
配置されてなる請求項９記載の中空糸膜モジュールユニ
ット。10. The hollow fiber membrane module unit according to claim 9, wherein the longitudinal direction of the hollow fiber membranes is arranged in a vertical direction.
ングのうち、上方に位置するハウジングの前記固定部分
近傍にのみ設けられてなる請求項１０記載の中空糸膜モ
ジュールユニット。11. The hollow fiber membrane module unit according to claim 10, wherein the protective member is provided only in the vicinity of the fixed portion of an upper housing of the facing housings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002042217A JP4147035B2 (en) | 2002-02-19 | 2002-02-19 | Hollow fiber membrane module and hollow fiber membrane module unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002042217A JP4147035B2 (en) | 2002-02-19 | 2002-02-19 | Hollow fiber membrane module and hollow fiber membrane module unit |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2003236348A true JP2003236348A (en) | 2003-08-26 |
| JP2003236348A5 JP2003236348A5 (en) | 2005-08-25 |
| JP4147035B2 JP4147035B2 (en) | 2008-09-10 |
Family
ID=27782401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002042217A Expired - Fee Related JP4147035B2 (en) | 2002-02-19 | 2002-02-19 | Hollow fiber membrane module and hollow fiber membrane module unit |
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| Country | Link |
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| JP (1) | JP4147035B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010142782A (en) * | 2008-12-22 | 2010-07-01 | Daiki Ataka Engineering Co Ltd | Membrane separation apparatus |
| JP2010523302A (en) * | 2007-04-04 | 2010-07-15 | シーメンス ウォーター テクノロジース コーポレイション | Membrane module protection |
-
2002
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010523302A (en) * | 2007-04-04 | 2010-07-15 | シーメンス ウォーター テクノロジース コーポレイション | Membrane module protection |
| JP2010142782A (en) * | 2008-12-22 | 2010-07-01 | Daiki Ataka Engineering Co Ltd | Membrane separation apparatus |
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| JP4147035B2 (en) | 2008-09-10 |
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