JP2017196541A - Filter membrane module and filter device - Google Patents

Filter membrane module and filter device Download PDF

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JP2017196541A
JP2017196541A JP2014187879A JP2014187879A JP2017196541A JP 2017196541 A JP2017196541 A JP 2017196541A JP 2014187879 A JP2014187879 A JP 2014187879A JP 2014187879 A JP2014187879 A JP 2014187879A JP 2017196541 A JP2017196541 A JP 2017196541A
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filtration membrane
cylindrical
filtration
membranes
membrane module
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博子 三木
Hiroko Miki
博子 三木
育 田中
Hagumu Tanaka
育 田中
知行 米田
Tomoyuki Yoneda
知行 米田
森田　徹
Toru Morita
徹 森田
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Sumitomo Electric Industries Ltd
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Sumitomo Electric Industries Ltd
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Priority to JP2014187879A priority Critical patent/JP2017196541A/en
Priority to PCT/JP2015/074345 priority patent/WO2016043015A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
    • B01D63/06—Tubular membrane modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B01D65/08—Prevention of membrane fouling or of concentration polarisation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06—Organic material
    • B01D71/30—Polyalkenyl halides
    • B01D71/32—Polyalkenyl halides containing fluorine atoms
    • B01D71/36—Polytetrafluoroethene
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a filter membrane module and a filter device which can prevent tangling of cylindrical filter membranes while maintaining scrubbing efficiency by air bubbles.SOLUTION: A filter membrane module includes: a plurality of cylindrical filter membranes which are sealed by a sealing member at lower ends and are arranged in parallel; a holding member which holds upper ends of the plurality of cylindrical filter membranes and has a flow channel communicating between insides of the plurality of cylindrical filter membranes; and a guide member which is arranged in a periphery of the lower ends of the plurality of cylindrical filter membranes and restricts a movable range in at least a direction orthogonal to a parallel direction of the plurality of cylindrical filter membranes. The guide member may include a plurality of regulation materials extending in the parallel direction so as to sandwich the plurality of cylindrical filter membranes. An average interval of the regulation materials facing to each other with the plurality of cylindrical filter membranes interposed therebetween is preferably 1.05-3 times of an average diameter of the cylindrical filter membranes. The regulation materials may be arranged so as to be overlapped with the sealing member in a horizontal view.SELECTED DRAWING: Figure 1

Description

本発明は、濾過膜モジュール及び濾過装置に関する。   The present invention relates to a filtration membrane module and a filtration device.

環境保全、医薬、食品等の多様な分野で、固液分離処理を行うために濾過装置が使用されている。このような濾過装置の中で、濾過膜をある程度の剛性を有する筒状に成形した筒型濾過膜を並列して配置する濾過膜モジュールが知られている（特開２００９−１０１３１１号公報参照）。   Filtration devices are used in various fields such as environmental protection, medicine, and food to perform solid-liquid separation processing. Among such filtration devices, there is known a filtration membrane module in which cylindrical filtration membranes obtained by forming a filtration membrane into a cylindrical shape having a certain degree of rigidity are arranged in parallel (see JP 2009-101311 A). .

このような濾過膜モジュールは、通常、複数の筒型濾過膜の上端を間隔を空けて保持すると共に、筒型濾過膜の内部空間と連通する流路を有する保持部材を備え、被処理液中に浸漬される。そのような濾過膜モジュールにおいて、複数の筒型濾過膜は、下端部を直接保持されなくても、上端部が保持部材に保持されて垂下されることによって、下端部も互いに間隔を空けて配置される。そして、これら複数の筒型濾過膜の下側に気泡を供給することで、各筒型濾過膜に沿って気泡を上昇させ、筒型濾過膜の周面に付着した固形物等を気泡のスクラブ効果により除去して筒型濾過膜の目詰まり抑制することができる。つまり、各筒型濾過膜の下端部を保持しないことにより、筒型濾過膜の下端部間に気泡の通過を妨げる他の物体が存在しないようにして、各筒型濾過膜の周面に気泡を供給し易くすることができる。   Such a filtration membrane module normally includes a holding member having a flow path that communicates with the internal space of the cylindrical filtration membrane while holding the upper ends of the plurality of cylindrical filtration membranes at intervals, and in a liquid to be treated. Soaked in. In such a filtration membrane module, the plurality of cylindrical filtration membranes are arranged with the lower end portions spaced apart from each other by the upper end portions being held and suspended by the holding member even if the lower end portions are not directly held. Is done. Then, by supplying the bubbles to the lower side of the plurality of cylindrical filtration membranes, the bubbles are raised along each cylindrical filtration membrane, and the solid matter or the like adhering to the peripheral surface of the cylindrical filtration membrane is scrubbed into bubbles. It can be removed by the effect and clogging of the cylindrical filtration membrane can be suppressed. In other words, by not holding the lower end portion of each cylindrical filtration membrane, there is no other object that prevents the passage of bubbles between the lower end portions of the cylindrical filtration membrane, and bubbles are formed on the peripheral surface of each cylindrical filtration membrane. Can be easily supplied.

特開２００９−１０１３１１号公報JP 2009-101311 A

上記公報に記載の濾過膜モジュールにおいて、処理能力を大きくするためには、並列される筒型濾過膜の本数を多くするか、各筒型濾過膜の長さを大きくすることが考えられる。中でも、筒型濾過膜の長さを大きくすることは、上記スクラビングのための気泡の導入量を抑制できるという利点がある。   In the filtration membrane module described in the above publication, in order to increase the processing capacity, it is conceivable to increase the number of cylindrical filtration membranes arranged in parallel or to increase the length of each cylindrical filtration membrane. Among these, increasing the length of the cylindrical filtration membrane has an advantage that the amount of bubbles introduced for scrubbing can be suppressed.

しかしながら、筒型濾過膜の長さを大きくすると、気泡や被処理液の流れにより筒型濾過膜が変形して筒型濾過膜同士が絡まり合い、濾過効率及び気泡によるスクラブ効率が低下するという不都合が生じる場合がある。   However, when the length of the tubular filtration membrane is increased, the tubular filtration membrane is deformed by the flow of bubbles or liquid to be treated, and the tubular filtration membranes are entangled with each other, so that the filtration efficiency and the scrub efficiency due to the bubbles are lowered. May occur.

本発明は、上述のような事情に基づいてなされたものであり、気泡によるスクラブ効率を維持したまま、筒型濾過膜同士の絡まりを防止できる濾過膜モジュール及び濾過装置を提供することを課題とする。   The present invention has been made based on the above situation, and it is an object to provide a filtration membrane module and a filtration device that can prevent entanglement between cylindrical filtration membranes while maintaining scrub efficiency due to bubbles. To do.

上記課題を解決するためになされた本発明の一態様に係る濾過膜モジュールは、下端が封止部材で封止され、並列される複数の筒型濾過膜と、上記複数の筒型濾過膜の上端を保持し、上記複数の筒型濾過膜の内部に連通する流路を有する保持部材と、上記複数の筒型濾過膜の下端近傍に配設され、上記複数の筒型濾過膜の少なくとも並列方向に直交する方向の移動可能範囲を制限するガイド部材とを備える。   A filtration membrane module according to an aspect of the present invention made to solve the above problems includes a plurality of cylindrical filtration membranes whose lower ends are sealed with a sealing member and arranged in parallel, and the plurality of cylindrical filtration membranes A holding member having a flow path that holds the upper end and communicates with the inside of the plurality of tubular filtration membranes, and is disposed in the vicinity of the lower ends of the plurality of tubular filtration membranes, and is at least parallel to the plurality of tubular filtration membranes. A guide member that limits a movable range in a direction orthogonal to the direction.

本発明の一態様に係る濾過膜モジュールは、気泡によるスクラブ効率を維持したまま、筒型濾過膜同士の絡まりを防止できる。   The filtration membrane module according to one embodiment of the present invention can prevent entanglement between cylindrical filtration membranes while maintaining scrub efficiency due to bubbles.

図１は、本発明の一実施形態の濾過膜モジュールの模式的斜視図である。FIG. 1 is a schematic perspective view of a filtration membrane module according to an embodiment of the present invention. 図２は、図１の濾過膜モジュールの模式的断面図である。FIG. 2 is a schematic cross-sectional view of the filtration membrane module of FIG. 図３は、図１の筒型濾過膜の模式的断面図である。FIG. 3 is a schematic cross-sectional view of the cylindrical filtration membrane of FIG. 図４は、本発明の一実施形態の濾過装置の構成を示す模式図である。FIG. 4 is a schematic diagram showing a configuration of a filtration device according to an embodiment of the present invention.

［本発明の実施形態の説明］
本発明の一態様に係る濾過膜モジュールは、下端が封止部材で封止され、並列される複数の筒型濾過膜と、上記複数の筒型濾過膜の上端を保持し、上記複数の筒型濾過膜の内部に連通する流路を有する保持部材と、上記複数の筒型濾過膜の下端近傍に配設され、上記複数の筒型濾過膜の少なくとも並列方向に直交する方向の移動可能範囲を制限するガイド部材とを備える。 [Description of Embodiment of the Present Invention]
A filtration membrane module according to an aspect of the present invention includes a plurality of cylindrical filtration membranes whose lower ends are sealed with a sealing member and arranged in parallel, and the upper ends of the plurality of cylindrical filtration membranes. A holding member having a flow path communicating with the inside of the mold filtration membrane, and a movable range disposed in the vicinity of the lower ends of the plurality of tubular filtration membranes and in a direction orthogonal to at least the parallel direction of the plurality of tubular filtration membranes And a guide member for limiting the above.

当該濾過膜モジュールは、筒型濾過膜の下端近傍にガイド部材が配設されていることにより、筒型濾過膜の並列方向に直交する方向の移動可能範囲を制限するので、筒型濾過膜同士の干渉により筒型濾過膜の下端部の並列方向の位置が入れ替わることが抑制される。これにより、筒型濾過膜同士が絡まり合うことを防止でき、気泡によるスクラブ効果及び濾過効率の減少を防止できる。ここで、「筒型濾過膜の下端近傍」とは、筒型濾過膜の下端からの距離が、筒型濾過膜の全長の１／２以下、好ましくは１／３以下である範囲をいう。また、「移動可能範囲を制限する」とは、移動可能範囲が残されており、筒型濾過膜の下端近傍のその方向の移動が完全に防止されるものを含まない。従って、筒型濾過膜の下端部の周囲には空間が残されており、下方から筒型濾過膜の周面への気泡の供給効率も確保される。   Since the filtration membrane module restricts the movable range in the direction orthogonal to the parallel direction of the cylindrical filtration membrane by arranging the guide member near the lower end of the cylindrical filtration membrane, the cylindrical filtration membranes It is suppressed that the position of the parallel direction of the lower end part of a cylindrical filtration membrane changes by interference of this. Thereby, it is possible to prevent the cylindrical filtration membranes from being entangled with each other, and it is possible to prevent a scrub effect due to bubbles and a decrease in filtration efficiency. Here, “near the lower end of the tubular filtration membrane” means a range in which the distance from the lower end of the tubular filtration membrane is ½ or less, preferably １ ／ or less of the total length of the tubular filtration membrane. In addition, “restricting the movable range” does not include those in which the movable range remains and the movement in the direction near the lower end of the tubular membrane is completely prevented. Accordingly, a space is left around the lower end portion of the cylindrical filtration membrane, and the supply efficiency of bubbles from the lower side to the peripheral surface of the cylindrical filtration membrane is also ensured.

上記ガイド部材が、上記複数の筒型濾過膜を挟むよう並列方向に延在する複数の規制材を有するとよい。このように、筒型濾過膜の列を挟む複数の規制材を有することによって、簡単な構成で確実に筒型濾過膜の並列方向に直交する方向の移動可能範囲を制限でき、筒型濾過膜同士が絡まり合うことを容易に防止できる。   The guide member may include a plurality of regulating members extending in a parallel direction so as to sandwich the plurality of cylindrical filtration membranes. Thus, by having a plurality of regulating members sandwiching the rows of cylindrical filtration membranes, the movable range in the direction perpendicular to the parallel direction of the cylindrical filtration membranes can be reliably limited with a simple configuration, and the cylindrical filtration membranes It is possible to easily prevent entanglement of each other.

上記筒型濾過膜を挟んで対向する規制材の平均間隔としては、筒型濾過膜の平均径の１．０５倍以上３倍以下が好ましい。このように、規制材の平均間隔の筒型濾過膜の平均径に対する比を上記範囲とすることによって、筒型濾過膜の周囲に気泡を供給する空間を確保すると共に、筒型濾過膜同士の絡まりを確実に防止できる。   The average distance between the regulating members facing each other with the cylindrical filtration membrane interposed therebetween is preferably 1.05 to 3 times the average diameter of the cylindrical filtration membrane. Thus, by setting the ratio of the average interval of the regulating material to the average diameter of the cylindrical filtration membrane within the above range, it is possible to secure a space for supplying bubbles around the cylindrical filtration membrane, and between the cylindrical filtration membranes. Entanglement can be reliably prevented.

上記規制材が、封止部材と水平視で重複するよう配設されるとよい。このように、規制材を封止部材と水平視で重複するよう配設することによって、筒型濾過膜が搖動する場合、強度を有する封止部材が規制材と当接するので、規制材との接触による筒型濾過膜の損傷を抑制できる。なお、「重複する」とは、少なくとも部分的に重なり合うことを意味する。   It is preferable that the regulating material is disposed so as to overlap with the sealing member in a horizontal view. In this way, by arranging the regulating material so as to overlap with the sealing member in a horizontal view, when the cylindrical filtration membrane swings, the sealing member having strength comes into contact with the regulating material. Damage to the cylindrical filtration membrane due to contact can be suppressed. “Overlapping” means at least partially overlapping.

上記保持部材が保持する上記複数の筒型濾過膜が、１列又は２列であるとよい。このように、筒型濾過膜が１列又は２列であることによって、各筒型濾過膜の少なくとも一方側の上方に保持部材に阻害されずに気泡が上昇する経路が確保され、筒型濾過膜の周面の一方側に沿って気泡が上昇し易いので、気泡によるスクラブ効果を高くできる。   The plurality of cylindrical filtration membranes held by the holding member may be in one or two rows. In this way, by having one or two cylindrical filtration membranes, a path through which bubbles rise without being obstructed by the holding member is secured above at least one side of each cylindrical filtration membrane. Since bubbles easily rise along one side of the peripheral surface of the film, the scrub effect by the bubbles can be enhanced.

上記型濾筒過膜が、最外に配設されるポリテトラフルオロエチレンを主成分とする多孔質膜と、この多孔質膜の内側に積層される不織布とを有するとよい。このように、筒型濾過膜が、最外層にポリテトラフルオロエチレンを主成分とする多孔質膜とこの多孔質膜の内側に積層される不織布とを有することによって、筒型濾過膜が機械的強度及び耐薬品性に優れる。筒型濾過膜の機械的強度が大きいことにより、気泡のスクラブによる負荷を大きく設定することができ、目詰まりを効率よく抑制できる。また、筒型濾過膜の耐薬品性が高いことにより、筒型濾過膜を長く使用できる。なお、「主成分」とは、含有質量が最も大きい成分をいい、好ましくは５０質量％以上、より好ましくは９５質量％以上含有する成分をいう。   It is preferable that the above-described filter tube permeation membrane has a porous membrane mainly composed of polytetrafluoroethylene disposed on the outermost side and a non-woven fabric laminated inside the porous membrane. As described above, the cylindrical filtration membrane has the porous membrane mainly composed of polytetrafluoroethylene and the nonwoven fabric laminated on the inner side of the porous membrane in the outermost layer, so that the cylindrical filtration membrane is mechanical. Excellent strength and chemical resistance. Since the mechanical strength of the cylindrical filtration membrane is large, it is possible to set a large load due to bubble scrubbing and to efficiently suppress clogging. Further, since the cylindrical filtration membrane has high chemical resistance, the cylindrical filtration membrane can be used for a long time. The “main component” refers to a component having the largest content, preferably 50% by mass or more, more preferably 95% by mass or more.

また、本発明の一態様に係る濾過装置は、１又は複数の当該濾過膜モジュールと、この１又は複数の濾過膜モジュールが浸漬されるよう被処理液を貯留する水槽と、上記濾過膜モジュールの下方から上記被処理液に気泡を供給する気泡供給器とを備える。当該濾過装置は、筒型濾過膜同士が絡まり難いことにより気泡によるスクラブ効果の高い濾過膜モジュールと、気泡供給器と備えるため、水槽に貯留する被処理液を効率よく濾過することができる。   Moreover, the filtration apparatus which concerns on 1 aspect of this invention is the water tank which stores a to-be-processed liquid so that this 1 or several filtration membrane module may be immersed, and the said filtration membrane module. A bubble supplier for supplying bubbles to the liquid to be treated from below. Since the said filtration apparatus is equipped with the filtration membrane module with a high scrub effect by a bubble, and a bubble supply device because it is hard to tangle between cylindrical filtration membranes, the to-be-processed liquid stored in a water tank can be filtered efficiently.

［本発明の実施形態の詳細］
以下、本発明の各実施形態について図面を参照しつつ詳説する。 [Details of the embodiment of the present invention]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

図１及び図２に、本発明の一実施形態に係る濾過膜モジュール１を示す。当該濾過膜モジュール１は、被処理液を濾過することにより、被処理液から固形物、場合によってはさらに油滴を除去するために使用される。   1 and 2 show a membrane filter module 1 according to an embodiment of the present invention. The said filtration membrane module 1 is used in order to remove a solid substance from a to-be-processed liquid, and also an oil drop by the case by filtering a to-be-processed liquid.

当該濾過膜モジュール１は、並列される複数の筒型濾過膜２と、この複数の筒型濾過膜２の上端を保持し、複数の筒型濾過膜２の内部に連通する処理済液流路３ａを有する保持部材３と、複数の筒型濾過膜２の下端近傍に配設され、複数の筒型濾過膜２の並列方向に直交する方向の移動可能範囲を制限するガイド部材４とを備える。   The filtration membrane module 1 includes a plurality of cylindrical filtration membranes 2 arranged in parallel, and processed liquid flow paths that hold upper ends of the plurality of cylindrical filtration membranes 2 and communicate with the inside of the plurality of cylindrical filtration membranes 2. A holding member 3 having 3a, and a guide member 4 that is disposed in the vicinity of the lower ends of the plurality of tubular filtration membranes 2 and limits a movable range in a direction orthogonal to the parallel direction of the plurality of tubular filtration membranes 2. .

＜筒型濾過膜＞
筒型濾過膜２は、筒状に形成され、上端が保持部材３により保持され、下端が封止部材５で封止されている（図２参照）。 <Cylindrical filtration membrane>
The cylindrical filtration membrane 2 is formed in a cylindrical shape, the upper end is held by the holding member 3, and the lower end is sealed by the sealing member 5 (see FIG. 2).

この筒型濾過膜２は、１又は複数の多孔質体の層から形成される。例として、図３に示すように、筒型濾過膜２は、ネット状の筒型支持体６の外周に多孔性膜体７を積層することにより形成できる。筒型支持体６の外周に多孔性膜体７を積層する方法としては、袋状に形成した多孔性膜体７の内側に筒型支持体６を挿入する方法や、筒型支持体６の外周に多孔性膜体７を円周方向又はらせん方向に巻き付ける方法が適用できる。   The cylindrical filtration membrane 2 is formed from one or a plurality of porous layers. As an example, as shown in FIG. 3, the cylindrical filtration membrane 2 can be formed by laminating a porous membrane 7 on the outer periphery of a net-like cylindrical support 6. As a method of laminating the porous membrane 7 on the outer periphery of the cylindrical support 6, a method of inserting the cylindrical support 6 inside the bag-shaped porous membrane 7, A method of winding the porous membrane 7 around the outer periphery in the circumferential direction or the spiral direction can be applied.

筒型濾過膜２の平均外径の下限としては、３ｍｍが好ましく、５ｍｍがより好ましい。一方、筒型濾過膜２の平均外径の上限としては、３０ｍｍが好ましく、２０ｍｍがより好ましい。筒型濾過膜２の平均外径が上記下限に満たない場合、剛性が不十分となるおそれがある。逆に、筒型濾過膜２の平均外径が上記上限を超える場合、体積当たりの濾過面積が小さくなるので濾過能力が不十分となるおそれがある。   The lower limit of the average outer diameter of the cylindrical filtration membrane 2 is preferably 3 mm, and more preferably 5 mm. On the other hand, the upper limit of the average outer diameter of the cylindrical filtration membrane 2 is preferably 30 mm, and more preferably 20 mm. If the average outer diameter of the tubular filtration membrane 2 is less than the lower limit, the rigidity may be insufficient. Conversely, when the average outer diameter of the cylindrical filtration membrane 2 exceeds the above upper limit, the filtration area per volume becomes small, and thus the filtration capacity may be insufficient.

筒型濾過膜２の保持部材３及び封止部材５間の露出部分の平均距離である平均有効長さの下限としては、５００ｍｍが好ましく、８００ｍｍがより好ましい。一方、筒型濾過膜２の平均有効長さの上限としては、５０００ｍｍが好ましく、４０００ｍｍがより好ましい。筒型濾過膜２の平均有効長さが上記下限に満たない場合、十分な濾過面積が得られないおそれがある。逆に、筒型濾過膜２の平均有効長さが上記上限を超える場合、筒型濾過膜２が変形し易くなり、ガイド部材４から脱離するおそれがある。   The lower limit of the average effective length, which is the average distance of the exposed portion between the holding member 3 and the sealing member 5 of the tubular filtration membrane 2, is preferably 500 mm, and more preferably 800 mm. On the other hand, the upper limit of the average effective length of the cylindrical filtration membrane 2 is preferably 5000 mm, and more preferably 4000 mm. When the average effective length of the cylindrical filtration membrane 2 is less than the lower limit, a sufficient filtration area may not be obtained. Conversely, when the average effective length of the tubular filtration membrane 2 exceeds the upper limit, the tubular filtration membrane 2 is likely to be deformed and may be detached from the guide member 4.

（筒型支持体）
筒型支持体６としては、樹脂製のネットを筒型に形成したものが利用できる。このネットを形成する樹脂組成物の主成分としては、例えばポリオレフィン、ポリエステル、フッ素樹脂等が挙げられ、中でも耐薬品性を有すると共に低コストで入手できるポリプロピレンが好ましい。 (Cylindrical support)
As the cylindrical support 6, a resin net formed in a cylindrical shape can be used. Examples of the main component of the resin composition that forms the net include polyolefin, polyester, fluororesin, and the like. Among them, polypropylene that has chemical resistance and can be obtained at low cost is preferable.

筒型支持体６を構成する樹脂製のネットは、例えば上記樹脂を主成分とする複数の線材を格子状に配置し、互いの交差部を熱融着することにより形成される。筒型支持体６において、上記線材は、筒型支持体６の軸方向に対して例えば±４５°傾斜するよう配置される。   The resin-made net | network which comprises the cylindrical support body 6 is formed by arrange | positioning the several wire which has the said resin as a main component in a grid | lattice form, for example, and heat-seal | fusing a mutual intersection part. In the cylindrical support 6, the wire is disposed so as to be inclined, for example, ± 45 ° with respect to the axial direction of the cylindrical support 6.

上記線材の平均径の下限としては、１ｍｍが好ましく、１．５ｍｍが好ましい。一方、上記線材の平均径の上限としては、３ｍｍが好ましく、２ｍｍが好ましい。上記線材の平均径が上記下限に満たない場合、筒型支持体６の強度が不十分となるおそれがある。逆に、上記線材の平均径が上記上限を超える場合、筒型支持体６の成形が難しくなるおそれがある。なお、上記線材は、異なる平均径のものが混在していてもよい。例えば一方向に配列された線材の外側に交差方向に配列された線材を融着する場合、外側の線材の平均径を内側の線材の平均径よりも大きくすることで、強度と目開きとをバランスすることが容易となる。   As a minimum of the average diameter of the above-mentioned wire rod, 1 mm is preferred and 1.5 mm is preferred. On the other hand, the upper limit of the average diameter of the wire is preferably 3 mm, more preferably 2 mm. When the average diameter of the wire is less than the lower limit, the strength of the cylindrical support 6 may be insufficient. On the other hand, when the average diameter of the wire exceeds the upper limit, it may be difficult to form the cylindrical support 6. In addition, the said wire may have a thing with a different average diameter. For example, when fusing wires arranged in the cross direction on the outside of wires arranged in one direction, the average diameter of the outer wires is made larger than the average diameter of the inner wires, so that the strength and mesh size are increased. It becomes easy to balance.

また、筒型支持体６の開口、つまり上記線材の間に形成される樹脂製のネットの孔の平均面積の下限としては、０．１ｍｍ２が好ましく、１ｍｍ２がより好ましい。一方、上記筒型支持体６の開口の平均面積の上限としては、５０ｍｍ２が好ましく、１０ｍｍ２がより好ましい。筒型支持体６の開口の平均面積が上記下限に満たない場合、開口率が小さく、筒型濾過膜２の濾過能力が不十分となるおそれがある。逆に、筒型支持体６の開口の平均面積が上記上限を超える場合、多孔性膜体７を十分に支持できないおそれがある。 The opening of the cylindrical support 6, that is the lower limit of the average area of the resin-made net hole formed between the wires, preferably 0.1 mm 2, 1 mm 2 is more preferable. In contrast, the upper limit of the average area of the opening of the tubular support 6 is preferably 50 mm 2, 10 mm 2 is more preferable. When the average area of the opening of the cylindrical support 6 is less than the lower limit, the opening ratio is small, and the filtering ability of the cylindrical filtration membrane 2 may be insufficient. On the contrary, when the average area of the opening of the cylindrical support body 6 exceeds the upper limit, the porous membrane body 7 may not be sufficiently supported.

（多孔性膜体）
多孔性膜体７は、少なくとも最外面に濾過の実効部分である層、つまり筒型濾過膜２において最も平均孔径が小さい層を有する。 (Porous membrane body)
The porous membrane body 7 has a layer which is an effective part of filtration at least on the outermost surface, that is, a layer having the smallest average pore diameter in the cylindrical filtration membrane 2.

このような多孔性膜体７は、図３に示すように、最外に配設される多孔質膜８と、この多孔質膜の内側に積層される不織布９とを有するものとすることが好ましい。多孔質膜８の内側に積層される不織布は、多孔性膜体７に寸法安定性を付与する。   As shown in FIG. 3, such a porous membrane body 7 has a porous membrane 8 disposed on the outermost side and a nonwoven fabric 9 laminated on the inner side of the porous membrane. preferable. The nonwoven fabric laminated inside the porous film 8 imparts dimensional stability to the porous film body 7.

〔多孔質膜〕
多孔質膜８の平均孔径の下限としては、０．０１μｍが好ましく、０．０５μｍがより好ましい。一方、多孔質膜８の平均孔径の上限としては、５μｍが好ましく、１μｍがより好ましい。多孔質膜８の平均孔径が上記下限に満たない場合、透水性が不十分となるおそれがある。逆に、多孔質膜８の平均孔径が上記上限を超える場合、筒型濾過膜２の内側への固形物及び油滴の透過を十分に阻止できないおそれがある。なお、「平均孔径」とは、細孔直径分布測定装置、例えばＰｏｒｕｓ Ｍａｔｅｒｉａｌｓ社の「多孔質材料自動細孔径分布測定システム」により測定される値である。 [Porous membrane]
The lower limit of the average pore diameter of the porous membrane 8 is preferably 0.01 μm, more preferably 0.05 μm. On the other hand, the upper limit of the average pore diameter of the porous membrane 8 is preferably 5 μm and more preferably 1 μm. If the average pore size of the porous membrane 8 is less than the lower limit, water permeability may be insufficient. On the contrary, when the average pore diameter of the porous membrane 8 exceeds the above upper limit, there is a possibility that the permeation of solids and oil droplets inside the cylindrical filtration membrane 2 cannot be sufficiently prevented. The “average pore diameter” is a value measured by a pore diameter distribution measuring device, for example, “Porous Material Automatic Pore Diameter Distribution Measuring System” by Porus Materials.

多孔質膜８の空孔を囲む繊維状骨格の平均最大長さの上限としては３０μｍが好ましく、５μｍがより好ましい。一方、上記繊維状骨格の平均最大長さの下限としては、特に限定されない。上記繊維状骨格の平均最大長さが上記上限を超える場合、多孔質膜８の空孔に粒子状物が目詰まりし易くなるおそれがある。なお、「繊維状骨格の平均最大長さ」とは、多孔質膜の表面における各空孔の最大長さの平均値を指し、多孔質膜の表面を拡大したＳＥＭ画像上で測定することができる。   The upper limit of the average maximum length of the fibrous skeleton surrounding the pores of the porous membrane 8 is preferably 30 μm and more preferably 5 μm. On the other hand, the lower limit of the average maximum length of the fibrous skeleton is not particularly limited. When the average maximum length of the fibrous skeleton exceeds the upper limit, there is a possibility that the particulate matter is easily clogged in the pores of the porous film 8. The “average maximum length of the fibrous skeleton” refers to the average value of the maximum length of each pore in the surface of the porous membrane, and can be measured on an enlarged SEM image of the surface of the porous membrane. it can.

また、多孔質膜８の平均厚さの下限としては、５μｍが好ましく、１０μｍがより好ましい。一方、多孔質膜８の平均厚さの上限としては２００μｍが好ましく、１５０μｍがより好ましい。多孔質膜８の平均厚さが上記下限に満たない場合、製造工程等において多孔質膜８に破れが生じるおそれがある。逆に、多孔質膜８の平均厚さが上記上限を超える場合、多孔質膜８の製造が困難となるおそれや、多孔質膜８が必要以上に高価となるおそれがある。   Moreover, as a minimum of the average thickness of the porous membrane 8, 5 micrometers is preferable and 10 micrometers is more preferable. On the other hand, the upper limit of the average thickness of the porous membrane 8 is preferably 200 μm, and more preferably 150 μm. When the average thickness of the porous membrane 8 is less than the lower limit, the porous membrane 8 may be broken in the manufacturing process or the like. Conversely, if the average thickness of the porous membrane 8 exceeds the above upper limit, the production of the porous membrane 8 may be difficult, or the porous membrane 8 may be more expensive than necessary.

多孔質膜８の気孔率の下限としては４０％が好ましく、５０％がより好ましい。一方、多孔質膜８の気孔率の上限としては９０％が好ましく、８０％がより好ましい。多孔質膜８の気孔率が上記下限に満たない場合、液体の透過率が不十分となるおそれがある。逆に、多孔質膜８の気孔率が上記上限を超える場合、多孔質膜８の強度が不足するおそれがある。なお、「気孔率」は、ＡＳＴＭ−Ｄ−７９２に準拠して多孔質膜８の密度を測定することで求めることができる。   The lower limit of the porosity of the porous membrane 8 is preferably 40%, more preferably 50%. On the other hand, the upper limit of the porosity of the porous membrane 8 is preferably 90%, more preferably 80%. If the porosity of the porous membrane 8 is less than the lower limit, the liquid permeability may be insufficient. Conversely, when the porosity of the porous membrane 8 exceeds the upper limit, the strength of the porous membrane 8 may be insufficient. The “porosity” can be determined by measuring the density of the porous membrane 8 in accordance with ASTM-D-792.

多孔質膜８の引張強度の下限としては、１０Ｎ／ｍｍ２が好ましい。また、多孔質膜８は、３質量％の硫酸、４質量％の水酸化ナトリウム水溶液及び有効塩素濃度１０％の次亜塩素酸ナトリウム水溶液のいずれに温度５０℃で１０日間浸漬しても透過水量が低下しない耐薬品性を有することが好ましい。なお、「引張強度」とは、ＪＩＳ−Ｋ−７１１３（１９９４）に準拠して測定される値である。 The lower limit of the tensile strength of the porous membrane 8 is preferably 10 N / mm 2 . In addition, the porous membrane 8 has a permeated water amount even if it is immersed in a 3% by mass sulfuric acid, a 4% by mass sodium hydroxide aqueous solution and an effective chlorine concentration 10% sodium hypochlorite aqueous solution at a temperature of 50 ° C. for 10 days. It is preferable to have chemical resistance that does not decrease. The “tensile strength” is a value measured according to JIS-K-7113 (1994).

このような多孔質膜８の材料としては、例えばポリオレフィン、ポリエステル、フッ素樹脂等を主成分とする樹脂組成物が挙げられ、中でも機械的強度及び耐薬品性に優れるポリテトラフルオロエチレンを主成分とする樹脂組成物が好ましい。   Examples of the material of the porous film 8 include resin compositions mainly composed of polyolefin, polyester, fluororesin, and the like. Among them, polytetrafluoroethylene having excellent mechanical strength and chemical resistance is the main component. A resin composition is preferred.

また、多孔質膜８の構造としては、例えば無孔性シートを延伸して裂孔を形成したもの、樹脂製繊維の織布や不織布等任意の構成のものを採用することができる。   Further, as the structure of the porous film 8, for example, a structure in which a non-porous sheet is stretched to form a fissure, a resin fiber woven fabric or non-woven fabric can be employed.

〔不織布〕
不織布９の材質としては、例えばポリオレフィン、ポリエステル等が挙げられ、中でも安価で耐薬品性に優れるポリプロピレンが好ましい。 [Nonwoven fabric]
Examples of the material of the nonwoven fabric 9 include polyolefin and polyester. Among them, polypropylene that is inexpensive and excellent in chemical resistance is preferable.

不織布９の目付量の下限としては、４０ｇ／ｍ２が好ましく、不織布９の目付量の上限としては、１２０ｇ／ｍ２が好ましい。また、不織布９の平均厚さの下限としては、０．３ｍｍが好ましく、不織布９の平均厚さの上限としては、０．９ｍｍが好ましい。不織布９の気孔率の下限としては、６５％が好ましく、不織布９の気孔率の上限としては、９０％が好ましい。不織布９の破裂強さの下限としては、１８０ｋＰａが好ましく、不織布９の破裂強さの上限としては、６００ｋＰａが好ましい。不織布９の突刺強さの下限としては、８Ｎが好ましく、不織布９の突刺強さの上限としては、２４Ｎが好ましい。なお、「破裂強さ」とは、ＪＩＳ−Ｌ−１０９６（２０１０）に準拠して測定される値である。また、「突刺強さ」とは、ＪＩＳ−Ｔ−８１１５（２０１０）に準拠して測定される値である。 The lower limit of the basis weight of the nonwoven fabric 9 is preferably 40 g / m 2 , and the upper limit of the basis weight of the nonwoven fabric 9 is preferably 120 g / m 2 . Further, the lower limit of the average thickness of the nonwoven fabric 9 is preferably 0.3 mm, and the upper limit of the average thickness of the nonwoven fabric 9 is preferably 0.9 mm. The lower limit of the porosity of the nonwoven fabric 9 is preferably 65%, and the upper limit of the porosity of the nonwoven fabric 9 is preferably 90%. The lower limit of the burst strength of the nonwoven fabric 9 is preferably 180 kPa, and the upper limit of the burst strength of the nonwoven fabric 9 is preferably 600 kPa. The lower limit of the piercing strength of the nonwoven fabric 9 is preferably 8N, and the upper limit of the piercing strength of the nonwoven fabric 9 is preferably 24N. The “burst strength” is a value measured according to JIS-L-1096 (2010). The “puncture strength” is a value measured according to JIS-T-8115 (2010).

（封止部材）
封止部材５は、筒型濾過膜２毎に設けられ、筒型濾過膜２の下端をそれぞれ封止している。この封止部材５は、例えば逆円錐形状等、下方から上昇してくる気泡を筒型濾過膜２の周面に案内できるような実質的に底面を有しない形状に形成されている。 (Sealing member)
The sealing member 5 is provided for each cylindrical filtration membrane 2 and seals the lower end of the cylindrical filtration membrane 2. The sealing member 5 is formed in a shape that does not have a substantially bottom surface, such as an inverted conical shape, that can guide bubbles rising from below to the peripheral surface of the tubular filtration membrane 2.

封止部材５の材質としては、特に限定されないが、例えば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（ＰＦＡ）、ウレタン樹脂、エポキシ樹脂等が挙げられ、多孔性膜体７と熱融着可能な樹脂が好適に用いられる。また、封止部材５と多孔性膜体７との隙間を接着剤等により封止してもよい。   The material of the sealing member 5 is not particularly limited, and examples thereof include tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer (PFA), urethane resin, epoxy resin, and the like, and can be heat-sealed with the porous film body 7. A suitable resin is preferably used. Further, the gap between the sealing member 5 and the porous membrane 7 may be sealed with an adhesive or the like.

＜保持部材＞
保持部材３は、１列又は複数列の筒型濾過膜２の上端を保持する。保持部材３は、保持する１列又は複数列の筒型濾過膜２の全ての内部に連通する処理済液流路３ａを有する。 <Holding member>
The holding member 3 holds the upper end of one or a plurality of rows of tubular filtration membranes 2. The holding member 3 includes a processed liquid flow path 3a that communicates with all of the one or more rows of tubular filtration membranes 2 to be held.

１つの保持部材３が保持する筒型濾過膜２の列数としては、特に限定されないが、１列以上１０列以下が好ましく、１列又は２列がより好ましい。保持部材３は、筒型濾過膜２の上端において筒型濾過膜２間の隙間を封止するため、気泡が筒型濾過膜２の上端近傍の周面に沿って上昇することを阻害する。このため、保持部材３が１１列以上の筒型濾過膜２を保持する場合、内側の列の筒型濾過膜２の気泡によるスクラブ効果が低くなるおそれがある。しかしながら、保持部材３が保持する筒型濾過膜２の列数を１列以上１０列以下、特に１列又は２列とすることによって、筒型濾過膜２の周面の少なくとも一方側部分に沿って気泡が上昇することを可能にし、筒型濾過膜２の目詰まりを効果的に抑制することができる。   The number of rows of the cylindrical filtration membranes 2 held by one holding member 3 is not particularly limited, but is preferably 1 row or more and 10 rows or less, and more preferably 1 row or 2 rows. Since the holding member 3 seals the gap between the tubular filtration membranes 2 at the upper end of the tubular filtration membrane 2, the holding member 3 prevents the bubbles from rising along the peripheral surface near the upper end of the tubular filtration membrane 2. For this reason, when the holding member 3 holds the tubular filtration membranes 2 in 11 rows or more, the scrub effect due to the bubbles in the tubular filtration membranes 2 in the inner row may be reduced. However, by setting the number of rows of the tubular filtration membrane 2 held by the holding member 3 to 1 row or more and 10 rows or less, particularly 1 row or 2 rows, along the at least one side portion of the peripheral surface of the tubular filtration membrane 2 Thus, the bubbles can be raised and clogging of the cylindrical filtration membrane 2 can be effectively suppressed.

保持部材３は、内側に処理済液流路３ａを画定し、下端が筒型濾過膜２が挿入可能に開口するケーシング１０と、複数の筒型濾過膜２の上端部を保持してケーシング１０の開口部に嵌合するスリーブ１１と、このスリーブ１１の内壁面と筒型濾過膜２の外周面との隙間に充填される封止樹脂１２とを有する。   The holding member 3 defines a treated liquid flow path 3 a on the inner side, and a casing 10 whose lower end is opened so that the cylindrical filtration membrane 2 can be inserted, and an upper end portion of the plurality of cylindrical filtration membranes 2 are held to hold the casing 10. And a sealing resin 12 filled in a gap between the inner wall surface of the sleeve 11 and the outer peripheral surface of the tubular filtration membrane 2.

また、保持部材３は、筒型濾過膜２の並列方向両端近傍において、支柱１３を垂下して保持する。この支柱１３の下端には、上記ガイド部材４が固定される。   In addition, the holding member 3 hangs down and holds the support column 13 in the vicinity of both ends of the cylindrical filtration membrane 2 in the parallel direction. The guide member 4 is fixed to the lower end of the column 13.

（ケーシング）
ケーシング１０は、処理済液流路３ａに配管を接続するためのノズル１０ａを有する。また、スリーブ１１をケーシング１０の開口部に係止してケーシング１０内に処理済液流路３ａが画定されることを確実にするよう、ケーシング１０の内壁に段差が形成されてもよい。 (casing)
The casing 10 has a nozzle 10a for connecting a pipe to the treated liquid flow path 3a. Further, a step may be formed on the inner wall of the casing 10 so that the sleeve 11 is locked to the opening of the casing 10 to ensure that the treated liquid flow path 3 a is defined in the casing 10.

このようなケーシング１０を形成する材質としては、例えば塩化ビニル、ＡＢＳ樹脂等を主成分とする樹脂組成物が挙げられる。   Examples of the material forming the casing 10 include a resin composition mainly composed of vinyl chloride, ABS resin, or the like.

（スリーブ）
スリーブ１１は、複数の筒型濾過膜２の上端が嵌合する複数の嵌合孔１１ａが形成される長方形板状乃至帯状の天壁１１ｂと、天壁１１ｂの四辺から下方に延出し、複数の筒型濾過膜２の上端部を取り囲む側壁１１ｃとを有する。このスリーブ１１は、その内壁面（側壁１１ｃの内側面）と筒型濾過膜２の外周面との隙間に充填された封止樹脂１２が硬化することにより、封止樹脂１２を介して筒型濾過膜２を保持する。天壁１１ｂは、嵌合孔１１ａによって複数の筒型濾過膜２の上端の間隔を定めると共に、封止樹脂１２の上方へのはみ出しを防止して処理済液流路３ａの流路面積を確保する。このようなスリーブ１１に予め筒型濾過膜２の上端部を保持させてから、このスリーブ１１をケーシング１０の開口部に嵌合させることにより、ケーシング１０の内部に確実に処理済液流路３ａを形成することができる。 (sleeve)
The sleeve 11 has a rectangular plate or belt-like top wall 11b in which a plurality of fitting holes 11a into which the upper ends of the plurality of tubular filtration membranes 2 are fitted, and extends downward from four sides of the top wall 11b. And a side wall 11c surrounding the upper end of the cylindrical filtration membrane 2. The sleeve 11 has a cylindrical shape through the sealing resin 12 when the sealing resin 12 filled in the gap between the inner wall surface (the inner surface of the side wall 11c) and the outer peripheral surface of the cylindrical filtration membrane 2 is cured. The filtration membrane 2 is held. The top wall 11b defines the interval between the upper ends of the plurality of tubular filtration membranes 2 by the fitting holes 11a, and prevents the sealing resin 12 from protruding upward to ensure the flow area of the processed liquid flow path 3a. To do. By holding the upper end portion of the cylindrical filtration membrane 2 in advance in such a sleeve 11, the sleeve 11 is fitted into the opening of the casing 10, so that the treated liquid flow path 3 a is surely provided inside the casing 10. Can be formed.

このスリーブ１１の材質としては、上記ケーシング１０と同様とすることができる。また、スリーブ１１とケーシング１０とは、両者の隙間を封止できる接着剤によって接着されることが好ましい。   The sleeve 11 can be made of the same material as the casing 10. Moreover, it is preferable that the sleeve 11 and the casing 10 are bonded by an adhesive capable of sealing the gap between them.

（封止樹脂）
封止樹脂１２は、スリーブ１１と筒型濾過膜２との隙間を封止すると共に、硬化することによりスリーブ１１と一体化して筒型濾過膜２の上端部を保持する。 (Sealing resin)
The sealing resin 12 seals the gap between the sleeve 11 and the tubular filtration membrane 2 and is cured to be integrated with the sleeve 11 to hold the upper end portion of the tubular filtration membrane 2.

封止樹脂１２の主成分としては、スリーブ１１及び筒型濾過膜２との接着性の高いものであればよいが、例えばウレタン樹脂等が挙げられる。   The main component of the sealing resin 12 may be any material that has high adhesiveness to the sleeve 11 and the cylindrical filtration membrane 2, and examples thereof include a urethane resin.

＜ガイド部材＞
ガイド部材４は、保持部材３から垂下される２本の支柱１３の下端に固定される一対の固定部１４と、この一対の固定部１４に両端が支持され、列をなす複数の筒型濾過膜２を挟むよう並列方向に延在する複数の規制材１５とを有することが好ましい。複数列の筒型濾過膜２が配列されている場合、筒型濾過膜２の列間に配置される規制材１５は、隣接する筒型濾過膜２の列に共有され、両側の筒型濾過膜２の移動可能範囲を制限することができる。 <Guide member>
The guide member 4 has a pair of fixing portions 14 fixed to the lower ends of the two support columns 13 suspended from the holding member 3, and a plurality of cylindrical filtrations that are supported at both ends by the pair of fixing portions 14 and form a row. It is preferable to have a plurality of regulating members 15 extending in the parallel direction so as to sandwich the membrane 2. When a plurality of rows of tubular filtration membranes 2 are arranged, the regulating material 15 disposed between the rows of the tubular filtration membranes 2 is shared by adjacent rows of the tubular filtration membranes 2, and the tubular filtration membranes on both sides are arranged. The movable range of the film 2 can be limited.

ガイド部材４は、複数の規制材１５により、筒型濾過膜２の下端が並列方向と直交する方向に一定距離を超えて移動できないように移動可能範囲を制限する。一方、ガイド部材４は、筒型濾過膜２の列の両端を除いて筒型濾過膜２の下端の並列方向の移動可能範囲を直接には規制しない。ここで「直接には規制しない」とは、筒型濾過膜２の下端の並列方向と直交する方向の移動可能範囲が規制される結果、並列方向に隣接する筒型濾過膜２の下端同士がぶつかり合い易くなり、間接的に筒型濾過膜２の下端部の並列方向の移動も抑制されることを排除しない。   The guide member 4 restricts the movable range by the plurality of regulating members 15 so that the lower end of the tubular filtration membrane 2 cannot move beyond a certain distance in a direction orthogonal to the parallel direction. On the other hand, the guide member 4 does not directly regulate the movable range in the parallel direction at the lower end of the tubular filtration membrane 2 except for both ends of the row of the tubular filtration membrane 2. Here, “not directly regulated” means that the movable range in the direction orthogonal to the parallel direction of the lower ends of the tubular filtration membranes 2 is restricted, so that the lower ends of the tubular filtration membranes 2 adjacent in the parallel direction are It is easy to collide, and it is not excluded that the movement in the parallel direction of the lower end portion of the cylindrical filtration membrane 2 is indirectly suppressed.

このガイド部材４を形成する材料としては、例えばステンレス等の金属、塩化ビニル、ＡＢＳ樹脂等を主成分とする樹脂組成物などが挙げられる。固定部１４と規制材１５とは一体に形成されてもよく、別々に形成された部材を接合してもよい。従って、固定部１４と規制材１５とは異なる材料で形成してもよい。   Examples of the material for forming the guide member 4 include a resin composition mainly composed of metal such as stainless steel, vinyl chloride, ABS resin, and the like. The fixing part 14 and the regulating member 15 may be formed integrally, or members formed separately may be joined. Therefore, the fixing part 14 and the regulating member 15 may be formed of different materials.

ガイド部材４は、規制材１５が封止部材５と水平視で重複するよう、つまり少なくとも部分的に重なり合うよう配設されることが好ましい。封止部材５及び筒型濾過膜２の封止部材５が設けられた部分は、比較的強度を有する。このため、筒型濾過膜２が撓んで搖動しても、筒型濾過膜２の中でも強度を有する部分又は封止部材５が規制材１５に当接するため、筒型濾過膜２が損傷し難い。   The guide member 4 is preferably disposed so that the regulating member 15 overlaps the sealing member 5 in a horizontal view, that is, at least partially overlaps. The portion of the sealing member 5 and the cylindrical filtration membrane 2 where the sealing member 5 is provided has a relatively high strength. For this reason, even if the cylindrical filtration membrane 2 bends and swings, the cylindrical filtration membrane 2 is difficult to be damaged because the portion of the tubular filtration membrane 2 having strength or the sealing member 5 contacts the regulating member 15. .

（規制材）
規制材１５は、十分な剛性を有するものであればよい。この規制材１５は、例えば板状、棒状、管状等の任意の形状を有し得るが、好ましくは帯板状に形成される。また、規制材１５は、並列方向の位置によって断面形状が変化するものであってもよい。 (Regulatory materials)
The restriction material 15 may be any material having sufficient rigidity. The regulating member 15 may have an arbitrary shape such as a plate shape, a rod shape, or a tubular shape, but is preferably formed in a band plate shape. Moreover, the cross-sectional shape of the regulating member 15 may change depending on the position in the parallel direction.

規制材１５は、エッジが面取りされてもよく、表面に筒型濾過膜２に対する衝撃や摩擦を緩和するために発泡樹脂や低摩擦性樹脂からなる部材が配設されてもよい。   The regulating material 15 may have a chamfered edge, and a member made of a foamed resin or a low friction resin may be disposed on the surface in order to reduce the impact and friction on the tubular filtration membrane 2.

規制材１５の平均有効高さ（水平視で筒型濾過膜２と重複する部分の垂直方向の平均長さ）の下限としては、筒型濾過膜２の平均有効長さの１％が好ましく、筒型濾過膜２の平均有効長さの２％がより好ましい。一方、規制材１５の平均有効高さの上限としては、筒型濾過膜２の平均有効長さの１０％が好ましく、筒型濾過膜２の平均有効長さの８％がより好ましい。規制材１５の平均有効高さが上記下限に満たない場合、筒型濾過膜２の変形により、筒型濾過膜２が規制材１５の間から脱離するおそれがある。逆に、規制材１５の平均有効高さが上記上限を超える場合、当該濾過膜モジュール１が不必要に大型化するおそれや、規制材１５が筒型濾過膜２と不必要に接触して筒型濾過膜２を損傷させるおそれがある。   As a lower limit of the average effective height of the regulating member 15 (the average length in the vertical direction of the portion overlapping with the tubular filtration membrane 2 in horizontal view), 1% of the average effective length of the tubular filtration membrane 2 is preferable. 2% of the average effective length of the cylindrical filtration membrane 2 is more preferable. On the other hand, the upper limit of the average effective height of the regulating member 15 is preferably 10% of the average effective length of the tubular filtration membrane 2, and more preferably 8% of the average effective length of the tubular filtration membrane 2. When the average effective height of the regulating material 15 is less than the lower limit, the tubular filtration membrane 2 may be detached from between the regulating materials 15 due to deformation of the tubular filtration membrane 2. On the contrary, when the average effective height of the regulating material 15 exceeds the above upper limit, the filtration membrane module 1 may be unnecessarily increased in size, or the regulating material 15 unnecessarily contacts the tubular filtration membrane 2 to form a cylinder. There is a risk of damaging the mold filtration membrane 2.

また、筒型濾過膜２の列を挟んで対向する規制材１５の平均間隔の下限としては、筒型濾過膜２の平均径の１．０５倍が好ましく、１．１倍がより好ましい。一方、規制材１５の平均間隔の上限としては、筒型濾過膜２の平均径の３倍が好ましく、２．５倍がより好ましい。規制材１５の平均間隔が上記下限に満たない場合、筒型濾過膜２の移動可能範囲が過度に制限されることで筒型濾過膜２の振動により筒型濾過膜２の周面に付着する固形物を振り落す効果が小さくなるおそれがある。逆に、規制材１５の平均間隔が上記上限を超える場合、筒型濾過膜２同士の絡まりを防止できないおそれがある。   Moreover, as a minimum of the average space | interval of the control material 15 which opposes on both sides of the row | line | column of the cylindrical filtration membrane 2, 1.05 times the average diameter of the cylindrical filtration membrane 2 is preferable, and 1.1 times is more preferable. On the other hand, the upper limit of the average interval between the regulating members 15 is preferably 3 times the average diameter of the tubular filtration membrane 2 and more preferably 2.5 times. When the average interval of the regulating material 15 is less than the above lower limit, the movable range of the cylindrical filtration membrane 2 is excessively limited, so that it adheres to the peripheral surface of the cylindrical filtration membrane 2 due to vibration of the cylindrical filtration membrane 2. There is a possibility that the effect of shaking off the solid matter may be reduced. On the contrary, when the average interval of the regulating material 15 exceeds the upper limit, there is a possibility that the entanglement between the tubular filtration membranes 2 cannot be prevented.

［利点］
当該濾過膜モジュール１は、筒型濾過膜２の下端が固定されていないので、下方から筒型濾過膜２の周面に気泡を供給するための空間が確保されており、筒型濾過膜２の周面に効率よく気泡を供給して、気泡のスクラブ効果により目詰まりを抑制することができる。また、筒型濾過膜２の下端が移動するような変形又はその振動により、筒型濾過膜２の周面に付着する固形物や油滴を振り落すことができ、筒型濾過膜２の目詰まりをさらに効率よく抑制できる。 [advantage]
In the filtration membrane module 1, the lower end of the tubular filtration membrane 2 is not fixed, so that a space for supplying bubbles from below to the peripheral surface of the tubular filtration membrane 2 is secured. Air bubbles can be efficiently supplied to the peripheral surface of the gas and clogging can be suppressed by the scrubbing effect of the air bubbles. Moreover, the deformation | transformation which the lower end of the cylindrical filtration membrane 2 moves, or its vibration can shake off the solid substance and oil droplet which adhere to the surrounding surface of the cylindrical filtration membrane 2, and the eyes of the cylindrical filtration membrane 2 Clogging can be suppressed more efficiently.

さらに、当該濾過膜モジュール１は、筒型濾過膜２の下端近傍に配設され、筒型濾過膜２の少なくとも並列方向に直交する方向の移動可能範囲を制限するガイド部材４を備えるので、筒型濾過膜２が変形しても複数の筒型濾過膜２がそれらの下端部の並列方向の位置を入れ替て絡まり合うことを抑制できる。これにより、筒型濾過膜２の変形を阻害することなく、複数の筒型濾過膜２の間に隙間を確保することで、気泡によるスクラブや振動により固形物や油滴を振り落す効果を確保しつつ、筒型濾過膜２同士の絡まりを効率よく防止できる。   Further, the filtration membrane module 1 includes a guide member 4 that is disposed in the vicinity of the lower end of the cylindrical filtration membrane 2 and limits the movable range of the cylindrical filtration membrane 2 in a direction orthogonal to at least the parallel direction. Even if the mold filtration membrane 2 is deformed, the plurality of tubular filtration membranes 2 can be prevented from being entangled by changing the positions of their lower end portions in the parallel direction. This ensures the effect of shaking off solids and oil droplets by scrubbing or vibrating with bubbles by securing gaps between the plurality of tubular filtration membranes 2 without hindering deformation of the tubular filtration membrane 2 However, the entanglement between the tubular filtration membranes 2 can be efficiently prevented.

当該濾過膜モジュール１において、ガイド部材４は、筒型濾過膜２の列を挟むよう並列方向に延在する複数の規制材を有するので、この規制材によって、筒型濾過膜２の下端部の並列方向への移動可能範囲は直接的に制限せず、並列方向に直交する方向の移動可能範囲だけを確実に制限できる。   In the filtration membrane module 1, the guide member 4 has a plurality of regulating members extending in the parallel direction so as to sandwich the rows of the cylindrical filtration membranes 2. The movable range in the parallel direction is not limited directly, and only the movable range in the direction orthogonal to the parallel direction can be reliably limited.

［濾過装置］
続いて、図４に、本発明の一実施形態に係る濾過装置を示す。図４の濾過装置は、複数の当該濾過膜モジュール１と、この複数の濾過膜モジュール１が浸漬されるよう被処理液を貯留する水槽２１と、濾過膜モジュール１の下方から被処理液に気泡Ｂを供給する気泡供給器２２とを備える。水槽２１内に配置され、濾過膜モジュール１、気泡供給器２２を保持するフレーム２３と、濾過膜モジュール１のノズル１０ａに接続される出水管２４を介して筒型濾過膜２を透過した処理済液を吸引する吸引ポンプ２５とを有する。 [Filtering equipment]
Subsequently, FIG. 4 shows a filtration device according to an embodiment of the present invention. The filtration device of FIG. 4 includes a plurality of the filtration membrane modules 1, a water tank 21 for storing the treatment liquid so that the plurality of filtration membrane modules 1 are immersed, and bubbles in the treatment liquid from below the filtration membrane module 1. And a bubble supply device 22 for supplying B. Processed by passing through the tubular membrane 2 through the drain 23 connected to the filter membrane module 1 and the nozzle 10a of the membrane membrane 1 disposed in the water tank 21 and holding the filtration membrane module 1 and the bubble feeder 22 And a suction pump 25 for sucking the liquid.

＜濾過膜モジュール＞
図４の濾過膜モジュール１の構成については、図１の濾過膜モジュール１と同様であるため、重複する説明を省略する。複数の濾過膜モジュール１は、水槽２１内で、互いに等間隔に配列される。これら複数の濾過膜モジュール１は、保持部材３がフレーム２３に係止される。なお、図４において、各濾過膜モジュール１は、複数の筒型濾過膜２が紙面奥行方向に列をなすよう配置される。 <Filtration membrane module>
The configuration of the filtration membrane module 1 in FIG. 4 is the same as that of the filtration membrane module 1 in FIG. The plurality of filtration membrane modules 1 are arranged at equal intervals in the water tank 21. In the plurality of filtration membrane modules 1, the holding member 3 is locked to the frame 23. In FIG. 4, each filtration membrane module 1 is arranged such that a plurality of cylindrical filtration membranes 2 form a line in the depth direction of the paper.

＜水槽＞
水槽２１は、被処理液を貯留する容器である。水槽２１の形状としては、特に限定されず、例えば箱型、円筒型等とすることができる。水槽２１の大きさとしては、特に限定されず、貯留する被処理液中に濾過膜モジュール１を浸漬できる大きさであればよい。また、水槽２１の材質としては、特に限定されず、例えば金属、樹脂、コンクリート等を用いることができる。 <Water tank>
The water tank 21 is a container for storing the liquid to be processed. It does not specifically limit as a shape of the water tank 21, For example, it can be set as a box shape, a cylindrical shape, etc. It does not specifically limit as a magnitude | size of the water tank 21, What is necessary is just a magnitude | size which can immerse the filtration membrane module 1 in the to-be-processed liquid to store. Moreover, it does not specifically limit as a material of the water tank 21, For example, a metal, resin, concrete, etc. can be used.

＜気泡供給器＞
気泡供給器２２は、上記濾過膜モジュール１の下方から、気泡Ｂを供給する。このような気泡供給器２２としては、公知のものを用いることができ、例えば濾過膜モジュール１と共に被処理液中に浸漬され、不図示の圧縮機等から給気管２６を通して連続的に供給される気体を内部に貯留し、一定体積になった気体を間欠的に吐出することで気泡Ｂを供給するものを用いることができる。 <Bubble feeder>
The bubble supplier 22 supplies bubbles B from below the filtration membrane module 1. As such a bubble supply device 22, a known device can be used. For example, the bubble supply device 22 is immersed in the liquid to be treated together with the filtration membrane module 1, and is continuously supplied through a supply pipe 26 from a compressor or the like (not shown). What supplies gas bubble B by storing gas inside and discharging the gas which became a fixed volume intermittently can be used.

なお、気泡供給器２２から供給する気体としては不活性のものであれば特に限定されないが、ランニングコストの観点から空気を用いることが好ましい。   The gas supplied from the bubble supplier 22 is not particularly limited as long as it is inert, but air is preferably used from the viewpoint of running cost.

＜フレーム＞
フレーム２３は、水槽２１内に配置することができ、かつ被処理液の流れを阻害することなく濾過膜モジュール１、気泡供給器２２を保持できるものであればよい。このようなフレーム２３は、例えばＬ型鋼等によって形成することができる。 <Frame>
The frame 23 may be any one that can be disposed in the water tank 21 and can hold the filtration membrane module 1 and the bubble supply device 22 without hindering the flow of the liquid to be treated. Such a frame 23 can be formed of, for example, L-shaped steel.

＜吸引ポンプ＞
吸引ポンプ２５は、保持部材３の処理済液流路３ａから処理済液を吸引することにより、筒型濾過膜２の内部を負圧にすることによって、被処理液中の液体成分に筒型濾過膜２を透過させる。 <Suction pump>
The suction pump 25 sucks the treated liquid from the treated liquid flow path 3a of the holding member 3 to make the inside of the tubular filtration membrane 2 have a negative pressure, so that the liquid component in the liquid to be treated is cylindrical. The filter membrane 2 is permeated.

［利点］
当該濾過装置は、濾過膜モジュール１の筒型濾過膜２の周面に沿って気泡Ｂを上昇させ、気泡Ｂによるスクラブ効果により、筒型濾過膜２の周面に付着する固形物や油滴を擦り落とすことができる。また、各筒型濾過膜２に対して気泡Ｂがランダムに衝突することにより、筒型濾過膜２を揺らすことができ、この機械的な振動により、筒型濾過膜２の周面に付着する固形物や油滴を振り落すこともできる。当該濾過装置は、これらの効果により、筒型濾過膜２の目詰まりを抑制することができる。 [advantage]
The filtration device raises the bubbles B along the circumferential surface of the tubular membrane 2 of the filtration membrane module 1, and solids and oil droplets attached to the circumferential surface of the tubular membrane 2 due to the scrubbing effect of the bubbles B. Can be scraped off. Moreover, the bubble B can collide with each cylindrical filtration membrane 2 at random, so that the cylindrical filtration membrane 2 can be shaken, and adheres to the peripheral surface of the cylindrical filtration membrane 2 by this mechanical vibration. You can also shake off solids and oil droplets. The said filtration apparatus can suppress clogging of the cylindrical filtration membrane 2 by these effects.

さらに、当該濾過装置は、ガイド部材４により筒型濾過膜２の絡まりを防止できるので、濾過効率、気泡Ｂによるスクラブ効果、及び筒型濾過膜２の振動効果の低下を抑制することができる。これにより、当該濾過装置は、稼働率を高くすることができる。   Furthermore, since the said filtration apparatus can prevent the tangle of the cylindrical filtration membrane 2 with the guide member 4, it can suppress the fall of the filtration efficiency, the scrub effect by the bubble B, and the vibration effect of the cylindrical filtration membrane 2. FIG. Thereby, the said filtration apparatus can make an operation rate high.

［その他の実施形態］
今回開示された実施の形態は全ての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は、上記実施形態の構成に限定されるものではなく、特許請求の範囲によって示され、特許請求の範囲と均等の意味及び範囲内での全ての変更が含まれることが意図される。 [Other Embodiments]
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is not limited to the configuration of the embodiment described above, but is defined by the scope of the claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of the claims. The

当該濾過膜モジュールにおいて、筒型濾過膜同士の並列方向に直交する方向の間隔が大きい場合には、ガイド部材が、筒型濾過膜の一列毎に一対の規制材を有してもよい。つまり、ガイド部材は、隣り合う筒型濾過膜の列間に２枚の規制材を配置するよう構成されてもよい。   In the said filtration membrane module, when the space | interval of the direction orthogonal to the parallel direction of cylindrical filtration membranes is large, a guide member may have a pair of regulation material for every row of cylindrical filtration membranes. That is, the guide member may be configured to dispose two regulating members between adjacent rows of cylindrical filtration membranes.

また、当該濾過膜モジュールのガイド部材は、筒型濾過膜の並列方向の移動可能範囲を制限する部材をさらに有してもよい。例えば、対をなす規制材間に架け渡され、筒型濾過膜の並列方向の移動可能範囲を制限する並列方向規制部材を配設してもよい。このような並列方向規制部材は、複数の筒型濾過膜毎に配設されてもよい。   Moreover, the guide member of the said filtration membrane module may further have a member which restrict | limits the movable range of the parallel direction of a cylindrical filtration membrane. For example, a parallel direction restricting member that spans between a pair of restricting members and restricts the movable range of the cylindrical filtration membrane in the parallel direction may be provided. Such a parallel direction regulating member may be disposed for each of the plurality of cylindrical filtration membranes.

また、当該濾過膜モジュールのガイド部材において、規制材は、筒型濾過膜の並列方向に延在するものの他、並列方向に並んで配設される複数の部材であってもよい。このような規制材としては、例えば１又は複数の筒型濾過膜を取り囲む筒状体、筒型濾過膜の並列方向と垂直方向両側に配列される任意の形状のブロック体や板状体等が挙げられる。   Further, in the guide member of the filtration membrane module, the regulating member may be a plurality of members arranged side by side in the parallel direction in addition to those extending in the parallel direction of the cylindrical filtration membrane. Examples of such a regulating material include a cylindrical body surrounding one or a plurality of cylindrical filtration membranes, a block body or a plate-like body having an arbitrary shape arranged on both sides of the parallel direction and the vertical direction of the cylindrical filtration membrane. Can be mentioned.

また、当該濾過装置に配設される濾過膜モジュールの数は、１以上の任意の数とすることができる。   Moreover, the number of the filtration membrane modules arrange | positioned at the said filtration apparatus can be made into 1 or more arbitrary numbers.

当該濾過装置において、気泡供給器と濾過膜モジュールとの間に、気泡供給器から供給される気泡をより小さい複数の気泡に分割する分割器を設けてもよい。このような分割器としては、隙間を空けて板状、線状又は散点状に配設される複数の部材を有するものを用いることができる。具体的には、分割器として、例えば１又は複数のワイヤーメッシュ等を使用することができる。   In the filtration device, a divider that divides bubbles supplied from the bubble supplier into a plurality of smaller bubbles may be provided between the bubble supplier and the filtration membrane module. As such a splitter, what has a plurality of members arranged in the shape of a plate, a line, or a dot with a gap can be used. Specifically, for example, one or a plurality of wire meshes can be used as the divider.

本発明に係る濾過膜モジュールは、被処理液を濾過する濾過装置に好適に利用することができる。   The filtration membrane module according to the present invention can be suitably used for a filtration device that filters a liquid to be treated.

１ 濾過膜モジュール
２ 筒型濾過膜
３ 保持部材
３ａ 処理済液流路
４ ガイド部材
５ 封止部材
６ 筒型支持体
７ 多孔性膜体
８ 多孔質膜
９ 不織布
１０ ケーシング
１０ａ ノズル
１１ スリーブ
１１ａ 嵌合孔
１１ｂ 天壁
１１ｃ 側壁
１２ 封止樹脂
１３ 支柱
１４ 固定部
１５ 規制材
２１ 水槽
２２ 気泡供給器
２３ フレーム
２４ 出水管
２５ 吸引ポンプ
２６ 給気管
Ｂ 気泡 DESCRIPTION OF SYMBOLS 1 Filtration membrane module 2 Cylindrical filtration membrane 3 Holding member 3a Processed liquid flow path 4 Guide member 5 Sealing member 6 Cylindrical support body 7 Porous membrane body 8 Porous membrane 9 Nonwoven fabric 10 Casing 10a Nozzle 11 Sleeve 11a Fitting Hole 11b Top wall 11c Side wall 12 Sealing resin 13 Strut 14 Fixing part 15 Regulating material 21 Water tank 22 Bubble supply device 23 Frame 24 Drain pipe 25 Suction pump 26 Air supply pipe B Bubble

Claims (7)

下端が封止部材で封止され、並列される複数の筒型濾過膜と、
上記複数の筒型濾過膜の上端を保持し、上記複数の筒型濾過膜の内部に連通する流路を有する保持部材と、
上記複数の筒型濾過膜の下端近傍に配設され、上記複数の筒型濾過膜の少なくとも並列方向に直交する方向の移動可能範囲を制限するガイド部材とを備える濾過膜モジュール。 A plurality of cylindrical filtration membranes whose lower ends are sealed with a sealing member and arranged in parallel,
Holding members having upper ends of the plurality of tubular filtration membranes and having flow paths communicating with the inside of the plurality of tubular filtration membranes;
A filtration membrane module comprising: a guide member that is disposed in the vicinity of the lower ends of the plurality of tubular filtration membranes and that limits a movable range in a direction orthogonal to at least the parallel direction of the plurality of tubular filtration membranes. 上記ガイド部材が、上記複数の筒型濾過膜を挟むよう並列方向に延在する複数の規制材を有する請求項１に記載の濾過膜モジュール。   The filtration membrane module according to claim 1, wherein the guide member has a plurality of regulating members extending in a parallel direction so as to sandwich the plurality of cylindrical filtration membranes. 上記筒型濾過膜を挟んで対向する規制材の平均間隔が、筒型濾過膜の平均径の１．０５倍以上３倍以下である請求項２に記載の濾過膜モジュール。   The filtration membrane module according to claim 2, wherein an average interval between the regulating members facing each other across the cylindrical filtration membrane is 1.05 to 3 times the average diameter of the cylindrical filtration membrane. 上記規制材が、封止部材と水平視で重複するよう配設される請求項２又は請求項３に記載の濾過膜モジュール。   The filtration membrane module according to claim 2 or 3, wherein the regulating member is disposed so as to overlap with the sealing member in a horizontal view. 上記保持部材が保持する上記複数の筒型濾過膜が、１列又は２列である請求項１から請求項４のいずれか１項に記載の濾過膜モジュール。   The filtration membrane module according to any one of claims 1 to 4, wherein the plurality of cylindrical filtration membranes held by the holding member are in one or two rows. 上記筒型濾過膜が、最外に配設されるポリテトラフルオロエチレンを主成分とする多孔質膜と、この多孔質膜の内側に積層される不織布とを有する請求項１から請求項５のいずれか１項に記載の濾過膜モジュール。   The said cylindrical filtration membrane has the porous membrane which has polytetrafluoroethylene as a main component arrange | positioned in the outermost part, and the nonwoven fabric laminated | stacked inside this porous membrane. The filtration membrane module of any one of Claims. 請求項１から請求項６のいずれか１項に記載の１又は複数の濾過膜モジュールと、この１又は複数の濾過膜モジュールが浸漬されるよう被処理液を貯留する水槽と、上記濾過膜モジュールの下方から上記被処理液に気泡を供給する気泡供給器とを備える濾過装置。   The one or more filtration membrane modules according to any one of claims 1 to 6, a water tank for storing a liquid to be treated so that the one or more filtration membrane modules are immersed, and the filtration membrane module And a bubble supply device for supplying bubbles to the liquid to be treated from below.
JP2014187879A 2014-09-16 2014-09-16 Filter membrane module and filter device Pending JP2017196541A (en)

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