JPH11319507A - The hollow fiber membrane module - Google Patents

The hollow fiber membrane module

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Publication number
JPH11319507A
JPH11319507A JP14067798A JP14067798A JPH11319507A JP H11319507 A JPH11319507 A JP H11319507A JP 14067798 A JP14067798 A JP 14067798A JP 14067798 A JP14067798 A JP 14067798A JP H11319507 A JPH11319507 A JP H11319507A
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JP
Japan
Prior art keywords
hollow fiber
fiber membrane
protective tube
membrane module
air
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.)
Pending
Application number
JP14067798A
Other languages
Japanese (ja)
Inventor
Masahiro Kihara
Kenji Sakai
Masahide Taniguchi
正浩 木原
雅英 谷口
憲司 酒井
Original Assignee
Toray Ind Inc
東レ株式会社
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Filing date
Publication date
Application filed by Toray Ind Inc, 東レ株式会社 filed Critical Toray Ind Inc
Priority to JP14067798A priority Critical patent/JPH11319507A/en
Publication of JPH11319507A publication Critical patent/JPH11319507A/en
Application status is Pending legal-status Critical

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Abstract

PROBLEM TO BE SOLVED: To provide a hollow fiber membrane module whose hollow fiber membranes are prevented from damages due to deterioration of the membranes by installing a protective cylinder for covering the hollow fiber membrane bundle near the adhesive fixation part and preventing deposition of suspended solid in the protective cylinder. SOLUTION: In this hollow fiber membrane module, a bundle 2 of a large number of hollow fiber membranes having an adhesive fixed part 3 in at least one end is fixed in an upper part of a housing 1 and the circumference of the hollow fiber membrane bundle 2 in the fixed end is covered with a protective cylinder 4 extended from the adhesive fixed part 3 and an air jetting hole 6 for air scrubbing is formed in a lower part of the housing 1 and an air discharge port 7 is formed in the peripheral part of the adhesive fixed part 3 in the upper part of the housing. In such a hollow fiber membrane module, the cylindrical face of the protective cylinder 4 is made a closed face through which a fluid is impossible to pass in the region at least 10 mm from the adhesive fixed part 3 and an opening part 40 through which a fluid can freely pass is formed in a region of 10-60 mm from the adhesive fixed part 3.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明はエアスクラビングを併用しながら液体濾過操作を行う中空糸膜モジュールに関し、さらに詳しくは、中空糸膜束の固定端部に保護筒を設けるようにしながら、該中空糸膜束固定端部付近での懸濁物質の堆積等を防止できるようにする中空糸膜モジュールに関する。 The present invention relates to relates to a hollow fiber membrane module for fluid filtration operation while a combination of air scrubbing, more particularly, in a manner that a protective tube to the fixed end of the hollow fiber membrane bundle, the hollow deposition or the like of the suspended matter in the vicinity Itomakutaba fixed end relates to a hollow fiber membrane module that can be prevented.

【0002】 [0002]

【従来の技術】多孔質の中空糸膜を使用した中空膜モジュールは、単位体積当たりの濾過膜面積を非常に大きくとれることから、従来から工業用水中の懸濁物質を除去する手段として多く適用されている。 Hollow membrane module using hollow fiber membranes of the Prior Art Porous, since the take very large filtration membrane area per unit volume, often applied as a means for removing suspended solids industrial water conventionally It is. このような中空膜モジュールの態様として、ハウジング下部に設けたエア噴射口からエアを定期的に導入し、エアスクラビングすることにより中空糸膜を振動させ、その膜面の堆積物を除去するようにしたものがある。 As to this aspect of the hollow membrane module, so as to periodically introduce air from the air injection port provided in the lower housing, it vibrates the hollow fiber membranes by air scrubbing, to remove deposits of the membrane surface there are things you have.

【0003】しかし、このエアスクラビングを併用する形態の中空膜モジュールでは、導入エアが中空糸膜束の固定部付近を過剰に揺動させるため中空糸膜の固定端部を損傷させたり、また導入エアの排出口に中空糸膜が引き込まれることによって、排出ノズルを塞ぐなどの問題も発生した。 However, the hollow membrane module according to a combination of the air scrubbing, or damage the fixed end portion of the hollow fiber membrane to over swing introduce air around the fixing portion of the hollow fiber membrane bundle, also introduced by the hollow fiber membrane is drawn into the air outlet, also it occurs problems such as blocking the discharge nozzle.

【0004】このような問題の対策として、図3に示すように、中空糸膜束の固定端部付近を円筒形の保護筒で覆うようにした中空膜モジュールが提案されている。 [0004] As a countermeasure for such problems, as shown in FIG. 3, the hollow membrane module so as to cover the vicinity of the fixed end portion of the hollow fiber membrane bundle in a cylindrical protective tube it has been proposed. この中空糸膜モジュールは、U状に折り曲げた中空膜束2 The hollow fiber membrane module, hollow membrane bundle 2 is bent in a U shape
の両端部が接着固定部3に固定され、その接着固定部3 Both end portions are fixed to the adhesive fixing portion 3 of the adhesive fixing portion 3
がハウジング1の内側上部に取り付けられている。 There has been mounted inside the upper portion of the housing 1. また、接着固定部3の内面に保護筒4が下向きに延長するように固定され、この保護筒4により中空糸膜束2の固定端部周囲が覆われるように保護されている。 The protective tube 4 to the inner surface of the adhesive fixing portion 3 is fixed so as to extend downwardly, are protected as the fixed end portion around the hollow fiber membrane bundle 2 is covered with the protective tube 4.

【0005】また、ハウジング1の下部には、工業用水等の被処理液体の供給口5が設けられると共に、エアスクラビング用のエアを導入するエア噴射口6(ノズル) Further, the lower portion of the housing 1, the supply port 5 of the treatment liquid such as industrial water is provided, the air injection port 6 for introducing air for air scrubbing (nozzle)
が多数環状に配置されている。 There are disposed a number annular. また、ハウジング1の上部には、接着固定部3の近傍に被処理液体の排水及びエアの排出を兼用する排出口7が設けられている。 Further, the upper portion of the housing 1, the discharge port 7 also serves as a drainage and air discharge of the liquid to be treated is provided in the vicinity of the bonded portion 3. また、 Also,
ハウジング1端部の接着固定部3の外側には濾過水の取出口8が設けられている。 The outside of the adhesive fixing portion 3 of the housing 1 the end outlet 8 preparative the filtered water is provided.

【0006】上記中空糸膜モジュールでは、エア噴射口6からエアを噴射することによりエアスクラビング操作すると、中空糸膜束2は揺れ動くが、上端の固定部が保護筒4に囲まれて自由度が制限されているため、過剰な揺れが接着固定部3に対する固定部まで及ばず、剪断力による折れなどを防止することができる。 [0006] In the hollow fiber membrane module, when air scrubbing operation by ejecting air from the air injection port 6, but the hollow fiber membrane bundle 2 is wavering, freedom fixing portion of the upper end is surrounded by a protective tube 4 due to restriction, it can be excessive shaking not extend to the fixed portion to the bonding and fixing portion 3, to prevent a breakage by shearing forces. また、中空糸膜が排出口7に引き込まれ難くなる。 Further, it hollow fiber membrane is hardly pulled into the outlets 7.

【0007】しかし、このように保護筒4を設けると、 However, in this way providing a protective tube 4,
エアスクラビングしても、中空糸膜束2の接着固定部3 It is air scrubbing, the adhesive fixing portion 3 of the hollow fiber membrane bundle 2
付近の動きが極端に制限されるため、濾過膜面に付着した懸濁物質が徐々に堆積されやすくなり、堆積物が成長していくことにより濾過に寄与する有効膜面積が徐々に低減していく。 Since the movement of the vicinity is extremely limited, suspended matter adhering to the filter membrane surface is gradually apt to be deposited, deposits with an effective membrane area is gradually reduced contributes to the filtration by grow go. また、通常の濾過運転においても、保護筒内に堆積物が蓄積した部分では中空糸膜が劣化して中空糸膜切れを発生するようになる。 Further, even in a normal filtration operation, so to generate a hollow fiber membrane breakage hollow fiber membrane is degraded in sediment in the protective tube has accumulated portion.

【0008】 [0008]

【発明が解決しようとする課題】本発明の目的は、接着固定部付近の中空糸膜束を覆う保護筒を設けながら、保護筒内での懸濁物質堆積を防止し、中空糸膜の劣化による損傷を防止するようにした中空糸膜モジュールを提供することにある。 The object of the present invention is to solve the above, while a protective tube covering the hollow fiber membrane bundle in the vicinity of the adhesive fixing portion to prevent suspended matter deposited in the protective tube, the deterioration of the hollow fiber membrane to provide a hollow fiber membrane module so as to prevent damage from.

【0009】 [0009]

【課題を解決するための手段】本発明の中空糸膜モジュールは、多本数の中空糸膜束の少なくとも一端を固定した接着固定部をハウジング上部に固定し、該中空糸膜束の固定端周囲を前記接着固定部から延長する保護筒で覆い、前記ハウジング下部にエアスクラビング用のエア噴射口を設け、前記ハウジング上部の前記接着固定部近傍にエア排出口を設けた中空糸膜モジュールにおいて、前記保護筒の筒面を前記接着固定部から少なくとも10m Means for Solving the Problems] The hollow fiber membrane module of the present invention, the adhesive fixing portions fixing the at least one end of the hollow fiber membrane bundle of the multi-number is fixed to the housing upper part, the fixed end around the hollow fiber membrane bundle covered with a protective tube extending from the bonded portion, the housing lower part d ask provided an air injection port for rubbing in the housing upper hollow fiber membrane module the provided air discharge port bonded vicinity of, the at least 10m cylinder surface of the protective tube from the bonded portion
mまでを流体が流通不能な閉面にすると共に、前記接着固定部から10〜60mmの範囲に流通自由な開口部を設けたことを特徴とするものである。 Up to m with fluid to a non distribution closed surface and is characterized in that a free opening distribution in the range of 10~60mm from the bonded portion.

【0010】このように本発明では、中空糸膜のエアスクラビング時の揺れを抑制する保護筒を設けてはいるが、接着固定部から少なくとも10mmまでの筒面を流体が流通不能な閉面にし、10〜60mmの範囲に流通自由な開口部を設けたので、保護筒内で接着固定部から少なくとも10mmまでの領域にエア溜まりを形成する。 [0010] Thus the present invention has the provided e ask inhibiting protective tube shaking during rubbing of the hollow fiber membrane, a tubular surface up to at least 10mm from the bonded portion to the fluid that is unable circulation closed surface , it is provided with the free aperture distribution in the range of 10 to 60 mm, to form the air pocket in the region of up to at least 10mm from the adhesive fixing portions in a protective tube. このエア溜まりでは、懸濁物質が堆積することがないから、接着固定部付近で中空糸膜が堆積物により劣化することはなく、またその劣化により中空糸膜切れが起こることもなくなる。 This is air reservoir, since suspended solids will not be deposited, does not deteriorate by the hollow fiber membrane deposits in the vicinity of the adhesive fixing portion, also eliminates also the hollow fiber membrane breakage caused by deterioration.

【0011】 [0011]

【発明の実施の形態】図1(A),(B)は、本発明の中空糸膜モジュールの一例を示す。 PREFERRED EMBODIMENTS FIG. 1 (A), (B) shows an example of a hollow fiber membrane module of the present invention. 中空糸膜モジュールの基本構造は、従来の図3と同じであり、中空膜束2は中間部がU状に折り曲げられ、両端部が接着固定部3に固定されている。 The basic structure of the hollow fiber membrane module is the same as the conventional 3, hollow membrane bundle 2 intermediate portion is bent in a U shape, both end portions are fixed to the adhesive fixing portion 3. このように中空糸膜束2を固定した接着固定部3がハウジング1の内側上部に取り付けられている。 Thus the hollow fiber membrane bundle 2 adhered and fixed portion 3 fixed to is attached to the inside upper portion of the housing 1. また、接着固定部3の内面には保護筒4が下向きに延長するように固定され、その内側に中空糸膜束2の固定端部周囲が保護されている。 The protective tube 4 on the inner surface of the adhesive fixing portion 3 is fixed so as to extend downwardly, the fixed end portion around the hollow fiber membrane bundle 2 is protected on the inside thereof.

【0012】ハウジング1の下部には被処理液体の供給口5が設けられると共に、エアスクラビング用のエア噴射口6(ノズル)が設けられている。 [0012] The lower portion of the housing 1 together with the supply port 5 of the treatment liquid is provided, the air injection port 6 for air scrubbing (nozzle) are provided. ハウジング1の上部には、接着固定部3の近傍に位置するように、被処理液体の排水及びエアの排出を兼用する排出口7が設けられている。 The top of the housing 1, so as to be positioned in the vicinity of the bonded portion 3, the outlet 7 is provided also serves as a drainage and air discharge of the liquid to be treated. ハウジング1の上端部には、接着固定部3の反対側に位置するように、中空糸膜束2で濾過された濾過水を取り出すための取出口8が設けられている。 At the upper end of the housing 1, so as to be positioned on the opposite side of the adhesive fixing portion 3, outlet 8 for taking out the filtered water filtered by the hollow fiber membrane bundle 2 is provided.

【0013】上記保護筒4は下端部が斜めに切り取られ、そのため排出口7に対面する側では筒面が長く、その反対側で筒面が短くなっている。 [0013] the protecting cylinder 4 at the lower end is cut obliquely so that the side facing the discharge port 7 has a long cylindrical surface, the cylindrical surface at the opposite side is shorter. この筒面の短い側は接着固定部3の内面からの最短距離Lが少なくとも10 The shortest distance L from the short side inner surfaces of the adhesive fixing portion 3 of the cylindrical surface of at least 10
mmに設定され、この領域における保護筒4の筒面が全域閉面になり、流体が保護筒の内外に移動できないようになっている。 Is set to mm, becomes the cylindrical surface has a total area closed surface protection drum 4 in this region, the fluid is prevented to move in and out of the protective tube. 最短距離Lよりも下方の領域は開口部4 Lower region than the shortest distance L is opening 4
oになるため、流体は保護筒内外に自由移動できる。 To become o, the fluid can freely move in the protective tube and out. この開口部4oの領域としては、接着固定部3の内面から10〜60mmの範囲に設定される。 The area of ​​the opening 4o, is set in the range of 10~60mm from the inner surface of the adhesive fixing portion 3.

【0014】上記構成の保護筒4を設けることにより、 [0014] By providing a protective sleeve 4 of the above configuration,
最短距離Lからなる筒状の閉面領域、すなわち接着固定部3の内面から少なくとも10mmの筒状の閉面領域にはエア溜りができる。 Tubular closed surface region consisting of the shortest distance L, that at least 10mm tubular closed surface area from the inner surface of the adhesive fixing portion 3 can air reservoir. このエア溜りには、通常の濾過操作時に被処理水が存在しないので、中空糸膜の膜面に原水中の懸濁物質が付着することがなく、中空糸膜の劣化も起こらない。 This is an air reservoir, during normal filtering operation because the treatment water does not exist, without suspended solids in raw water to the membrane surface of the hollow fiber membrane is attached, it does not occur deterioration of the hollow fiber membrane.

【0015】また、最短距離Lより下方の開口部4oでは、流体が自由に内外に移動するため、エアスクラビング時には中空糸膜束2の過剰な揺れを制限しつつ、僅かな揺れだけを許容するので懸濁物質が膜面に付着することはない。 Further, the opening 4o than the shortest distance L lower, for fluid to move freely in and out, at the time of air scrubbing while limiting the excessive shaking of the hollow fiber membrane bundle 2, to permit only slight shaking never suspended solids from adhering to the film surface so. また、過剰な揺れが中空糸膜束2の固定端まで及ぶことがないので、剪断力による折れなども防止することができる。 Further, since the excessive shaking never extends to the hollow fiber membrane bundle 2 fixed end, it is also possible to prevent such breakage by shearing forces.

【0016】上記開口部4oとしては、図1(B)に示すように、排出口7の入口中心を通る保護筒4の横断面において、保護筒4の横断面中心Oと排出口7の入口中心とを結ぶ線分Aに対して、該中心Oから左右に±30 [0016] As the opening 4o, as shown in FIG. 1 (B), in the transverse plane of the protective tube 4 through the inlet center of the discharge port 7, the inlet cross section the center O and the outlet 7 of the protective tube 4 ± relative line segment a, the left and right from said center O connecting the center 30
°ずつ臨む領域を除いた保護筒の部分に存在するようにすることが望ましい。 ° it is desirable to present in the portion of the protecting cylinder except for the region facing each. このような開口部4oの配置によって、エアスクラビング時に中空糸膜が排出口7に吸い込まれるのを効果的に防止することができる。 The arrangement of such openings 4o, can be hollow fiber membrane during air scrubbing is effectively prevented from being sucked to the discharge port 7.

【0017】図2(A),(B)は、本発明の他の実施形態を示すものである。 FIG. 2 (A), (B) is a diagram showing another embodiment of the present invention. この実施形態は、保護筒4に設ける開口部4oが複数の孔の集合体として構成した以外は図1と同様の構成からなっている。 This embodiment, except that opening 4o disposed in the protective tube 4 is constructed as an aggregate of a plurality of holes are made of the same configuration as FIG. 開口部4oの接着固定部3の内面からの距離は、最短距離Lを少なくとも10mmであるように設定し、また開口部4oを設ける領域を、接着固定部3の内面から10〜60mmの範囲であるように設定する。 Distance from the inner surface of the adhesive fixing portion 3 of the opening portion 4o are set to be at least 10mm and the shortest distance L, also the region where an opening 4o, in a range of 10~60mm from the inner surface of the adhesive fixing portion 3 set a certain way.

【0018】この実施形態の場合も、図1の場合と同様に、最短距離Lからなる筒状の閉面領域にエア溜まりが出来るので、中空糸膜の膜面に原水中の懸濁物質が付着することがなく、中空糸膜の劣化も起こらない。 [0018] Also in this embodiment, as in the case of FIG. 1, the air pocket in a cylindrical closed surface region consisting of the shortest distance L can, is suspended solids on the membrane surface of the raw water of the hollow fiber membrane without adhering, does not occur deterioration of the hollow fiber membrane. また、 Also,
開口部4oでは、流体が自由に内外に移動するため、エアスクラビング時における中空糸膜束2の過剰な揺れを制限し、僅かな揺れだけができるため懸濁物質が膜面に付着することがなく、また、過剰な揺れが中空糸膜束2 The opening 4o, since the fluid is free to move in and out, be suspended substances for limiting the excessive shaking of the hollow fiber membrane bundle 2 can only slight shaking during air scrubbing is attached to the film surface without also excessive shaking the hollow fiber membrane bundle 2
の固定端に及んで剪断力による折れなどを起こすことも防止できる。 It can be prevented span the fixed end to cause such breakage by shearing forces.

【0019】また、図2(B)に示すように、開口部4 Further, as shown in FIG. 2 (B), the opening 4
oは、排出口7の入口中心を通る保護筒4の横断面において、保護筒4の横断面中心Oと排出口7の入口中心とを結ぶ線分Aに対し、該中心Oから左右に±30°ずつ臨む領域を除いた保護筒の部分に配置されていることが望ましく、これによって中空糸膜が排出口7に吸い込まれないようにする。 o is, ± in cross-section of the protective tube 4 through the inlet center of the discharge port 7, to the line segment A connecting the inlet center of the cross section center O and the outlet 7 of the protective tube 4, to the left and right from said center O desirably disposed in a portion of the protective tube, excluding the area facing each 30 °, whereby the hollow fiber membrane is prevented drawn into the discharge port 7.

【0020】本発明の中空糸膜モジュールは、多数本の多孔質中空糸膜をハウジング内に装填し、モジュール内に固液混合の液体を導入し、中空糸膜面によって固液分離ができる構造ならば特に形状は限定されない。 The hollow fiber membrane module of the present invention, loaded with a large number of porous hollow fiber membranes in the housing, and introducing a liquid of solid-liquid mixtures in the module, it is solid-liquid separated by the hollow fiber membrane surface structure if not particularly shape is limited. 一般的には、中空糸膜束の少なくとも一端を接着剤でハウジングとともに接着固定し、接着固定部を切断して中空糸膜の内部を開口した構造が使用される。 In general, bonded and fixed with the housing at least one end of the hollow fiber membrane bundle with adhesive, inside the opened structure of the hollow fiber membrane is used by cutting the bonded and fixed portion. この構造においては、中空糸膜をハウジング内に直線状に配置し、ハウジングとともに一端、もしくは両端を固定したものや、或いは図1や図2の実施形態のように、中空糸膜をU字状に束ねてハウジングとともに一端を固定するものが挙げられる。 In this structure, the hollow fiber membranes are arranged in a straight line into the housing, one end with the housing or and that is fixed at both ends, or as in the embodiment of FIGS. 1 and 2, the hollow fiber membranes U-shaped It includes those fixing one end with housing bundled.

【0021】本発明の中空糸膜モジュールを構成するハウジングの大きさは特に限定されないが、モジュールの製作が容易であり、またモジュールのハンドリングが比較的容易である観点から、ハウジング径が50〜600 The size of the housing constituting the hollow fiber membrane module of the present invention is not particularly limited, the fabrication of the module is easy, also in view handling module is relatively easy, housing diameter 50 to 600
mm程度で、長さが20〜2500mmの範囲から便宜選択するとよい。 At about mm, it may in length selected for convenience from a range of 20~2500Mm. ハウジングの材質としては、金属、樹脂のいずれでもよい。 The material of the housing, the metal may be any of resin. 樹脂としては、好ましくはアクリル樹脂、塩化ビニル樹脂、ポリスルホン、変形ポリフェニレンオキサイド、ポリカーボネート樹脂などが適当である。 The resin is preferably an acrylic resin, vinyl chloride resin, polysulfone, modified polyphenylene oxide, and polycarbonate resin is suitable.

【0022】本発明の中空糸膜モジュールに使用する中空糸膜としては、多孔質の中空糸膜であれば、特に限定しないが、ポリエチレン、ポリプロピレン、ポリスルホン、ポリエーテルスルホン、ポリビニルアルコール、セルロースアセテート、ポリアクリロニトリル、その他の材質を選択することができる。 [0022] As the hollow fiber membrane used in the hollow fiber membrane module of the present invention, if a hollow fiber membrane of porous, is not particularly limited, polyethylene, polypropylene, polysulfone, polyether sulfone, polyvinyl alcohol, cellulose acetate, it can be selected polyacrylonitrile, other materials. 中空糸膜表面の細孔径についても特に限定されないが、0.001μm〜1μm There is no particular limitation on the pore diameter of the hollow fiber membrane surfaces, 0.001Myuemu~1myuemu
の範囲内で便宜選択することができる。 It can be conveniently selected within the range of. また、中空糸膜の外径についても特に限定されないが、250μm〜2 Although there is no particular limitation on the outer diameter of the hollow fiber membrane, 250Myuemu~2
000μmの範囲内で中空糸膜の揺動性が高く、洗浄性に優れるため好ましい。 High swinging property of the hollow fiber membrane within the 000Myuemu, preferred because of its excellent washability.

【0023】また、ハウジングと中空糸膜との間を液密に接着する接着剤については、特に限定されいが、好ましくはエポキシ樹脂、ウレタン樹脂などの熱硬化性樹脂を用いることができる。 [0023] Also, the adhesive for bonding the liquid-tight between the housing and the hollow fiber membrane, but not particularly limited, can be preferably used a thermosetting resin such as epoxy resins, urethane resins. 保護筒は、中空糸膜束の外周を取り囲む構造体であり、その固定方法は特に限定されない。 Protecting cylinder is a structure surrounding the outer periphery of the hollow fiber membrane bundle, the fixing method is not particularly limited. 好ましくは、中空糸膜束とともに接着剤でモジュール内に固定するか、或いはハウジングの内面へ接着するのが適当である。 Preferably, either together with the hollow fiber membrane bundle is fixed to the module with an adhesive, or it is appropriate to adhere to the inner surface of the housing.

【0024】保護筒の形状は、モジュール内に装填している中空糸膜束の外周部を囲むことができる形状であれば特に限定されないが、好ましくは円筒形が適当である。 The protective tubular shape, if the shape that can surround the outer peripheral portion of the hollow fiber membrane bundle is loaded into the module is not particularly limited, it is preferably cylindrical appropriate. 円筒形とは、軸に直交する横断面の形状が円形、楕円形またはこれに準ずる形状であるものをいう。 The cylindrical, refers to the shape of the cross section perpendicular to the axis has a shape equivalent circular, oval or thereto. この円筒形の保護筒により、保護筒と中空糸膜との接触による中空糸膜の損傷を低減することができる。 The protective tube of this cylindrical, it is possible to reduce the damage of the hollow fiber membranes due to contact between the protective tube and the hollow fiber membrane.

【0025】この保護筒の筒面は、接着固定部の内面から少なくとも10mm、好ましくは10mm〜60mm The cylindrical surface of the protective tube is at least 10mm from the inner surface of the adhesive fixing portion, preferably 10mm~60mm
の範囲内の位置までを閉面にし、流体が流出しない形状にすれば特に形状は限定されない。 A to a position within the range of the closed surface, in particular the shape if the shape fluid does not flow out is not limited. 好ましくは、円筒形の下端部を開口部として一部切り取った形状、特に図1 Preferably, the shape obtained by cutting a part of the lower end of the cylindrical as an opening, in particular Figure 1
のように、軸に直交する方向に対して30°程度に斜めに切った形状にしたものがよい。 As such, it is intended that the shapes beveled at about 30 ° with respect to a direction perpendicular to the axis of.

【0026】また、図2のように、円筒形の保護筒に多数の孔からなる開口部を設けたものでもよい。 Further, as shown in FIG. 2, it may be provided with the opening consisting of a large number of holes in the protective tube of the cylinder. その筒面は、接着固定部内面から少なくとも10mmまでを閉面にして、流体の内外移動がないようにし、また閉面域の下方に多数の孔からなる開口部を設け、流体の内外移動ができるようにする。 Its cylindrical surface, and up to at least 10mm from the bonded portion inner surface in closed surface, so there is no inner and outer movement of the fluid, also an opening comprising a plurality of holes below the closed surface area, the inner and outer fluid movement It can be so.

【0027】保護筒の閉面長さを接着固定部内面から1 [0027] The closed surface length of the protective tube from the bonded inner surface 1
0mmよりも短くしたのでは、接着固定部付近にエア溜りを作ることが困難になる。 Than was shorter than 0 mm, it becomes difficult to make the air reservoir in the vicinity of the adhesive fixing portion. また、閉面長さを60mm In addition, 60mm a closed surface length
よりも長くすると、流体が流出する構造である場合には、通常モジュール内に供給されるモジュール断面積あたり、0.1〜5.0m 3 /m 2の供給流量であれば、 The longer than when a structure in which the fluid flows out, per module cross-sectional area which is fed into the normal module, if the supply flow rate of 0.1~5.0m 3 / m 2,
エア溜りを作ることができるため、濾過に寄与する有効膜面積を減少させるデメリットが大きい。 It is possible to make the air reservoir, a large disadvantage of reducing the effective membrane area contributes to the filtration.

【0028】保護筒の材質としては、金属、樹脂のいずれでもよいが、中空糸膜の損傷を少なくする観点からは、アクリル樹脂、塩化ビニル樹脂、ポリスルホン、変形ポリフェニレンオキサイド、ポリカーボネート樹脂などの樹脂が好ましい。 [0028] As the material of the protective tube is a metal, it may be any of resins, from the viewpoint of reducing the damage of the hollow fiber membranes, an acrylic resin, vinyl chloride resin, polysulfone, modified polyphenylene oxide, a resin such as polycarbonate resin preferable.

【0029】 [0029]

【実施例】実施例1 外径680μm、内径400μm、平均細孔径0.01 EXAMPLE 1 outer diameter 680 micrometer, inner diameter 400 [mu] m, an average pore diameter of 0.01
μmのポリアクリロニトリル多孔質中空糸膜3500本からなる中空糸膜束をU字状に束ね、その両端部を、外径85mm、内径82mmで接着固定部側の端部から1 The hollow fiber membrane bundle consisting of polyacrylonitrile porous hollow fiber membrane 3500 of μm bundled in a U-shape, the two ends, an outer diameter of 85 mm, from the end of the bonded portion in the inner diameter 82mm 1
5mmの位置に孔を8個、30mmの位置に8個を設けた保護筒に挿入し、この保護筒をU字状に束ねた中空糸膜束と共に、外径110mm、内径104mmの硬質塩化ビニルパイプのハウジング内に挿入して、片端部を接着剤で固定したのち、その接着固定部の一部を切断して中空糸膜の内部を開口させた。 Eight holes at the position of 5 mm, was inserted into the protective tube provided with eight to the position of 30 mm, the protective tube together with the hollow fiber membrane bundle obtained by bundling a U-shape, the outer diameter 110 mm, hard vinyl chloride having an inner diameter of 104mm is inserted into the pipe of the housing, after fixing the one end portion with an adhesive, it was opened inside of the hollow fiber membranes by cutting a part of the bonded portion.

【0030】また、この時の保護筒は、接着固定部から40mmに延長した長さであり、保護筒面の孔(開口部)の位置を、保護筒横断面中心Oからハウジングのエア排出口の入口中心に通る線分に対して、その中心Oから左右に±30°の範囲の領域を外した部分に配置した。 Further, the protective tube at this time is the length extending in 40mm from the adhesive fixing portion, positions, air outlet of the housing from the protective pipe cross-section center O of the hole of the protective cylindrical surface (opening) against line segment that passes through the inlet center, it was placed in a portion removing the region ranging from ± 30 ° to the left and right from the center O. また、ハウジングの下部に、総面積60mm 2の8 Further, the lower portion of the housing, a total area of 60 mm 2 8
個の噴射口を有するエア噴射部を水平に配置し、図2に示すような形状の長さ1100mm、中空糸膜有効長8 Number of injection openings are arranged horizontally air jetting portion having a length 1100mm a shape as shown in FIG. 2, the hollow fiber membrane effective length 8
00mmの中空糸膜モジュールを製作した。 It was fabricated hollow fiber membrane module of 00mm.

【0031】この中空糸膜モジュールに、30リットル/分の純水を30秒間給水、13分の濾過、30リットル/分のエアを1分間エアースクラビング、30秒の排水を1サイクルとする濾過運転を連続して2ヶ月間実施したが、接着固定部付近に中空糸膜の損傷は発生しなかった。 [0031] The hollow fiber membrane module, feed water 30 l / min of pure water for 30 seconds, 13 minutes filtration, 30 liters / minute air scrubbing the air for 1 minute, filtration operation to drain the 1 cycle of 30 seconds was 2 months carried out continuously, but damage to the hollow fiber membrane was generated in the vicinity of the bonded portion.

【0032】実施例2 外径680μm、内径400μm、平均細孔径0.01 [0032] Example 2 outer diameter 680 micrometer, inner diameter 400 [mu] m, an average pore diameter of 0.01
μmのポリアクリロニトリル多孔質中空糸膜3500本からなる中空糸膜束をU字状に束ね、その両端部を、外径85mm、内径82mmの円筒材の下端部を軸に直交する面に対し角度30°で斜めに切断した保護筒内に挿入状態にし、外径110mm、内径104mmの硬質塩化ビニルパイプのハウジング内に挿入して、その片端部を接着剤で固定すると共に、その接着固定部の一部を切断して中空糸膜の内部を開口させた。 The hollow fiber membrane bundle consisting of polyacrylonitrile porous hollow fiber membrane 3500 of μm bundled in a U-shape, the angle opposite ends thereof, an outer diameter of 85 mm, with respect to a plane perpendicular to the axis of the lower end portion of the cylindrical member having an inner diameter of 82mm the insertion state into the protective tube cut diagonally at 30 °, outer diameter 110 mm, is inserted into the housing of the hard vinyl chloride pipe having an inner diameter of 104 mm, while fixing the one end portion with an adhesive, the adhesive fixing portion was opened inside of the hollow fiber membrane is cut partially.

【0033】また、この時の保護筒の斜下端部の接着固定部内面から最短距離は40mmであり、その最短距離部をエア排出口とは反対側に位置させた。 Further, the shortest distance from the adhered and fixed portion inner surface of the swash lower end of the protective tube at this time was 40 mm, was positioned on the opposite side of the air outlet and the shortest distance unit. また、ハウジングの下部に、総面積60mm 2の8個の噴射口を有するエア噴射部を水平に配置し、図1に示すような形状の長さ1100mm、中空糸膜有効長800mmの中空糸膜モジュールを製作した。 Further, the lower portion of the housing, an air injection unit having eight jets of the total area 60 mm 2 was placed horizontally, length 1100mm a shape as shown in FIG. 1, the hollow fiber membrane of the hollow fiber membrane effective length 800mm It was fabricated module.

【0034】この中空糸膜モジュールに、30リットル/分の純水を30秒間給水、13分の濾過、30リットル/分のエアを1分間エアースクラビング、30秒の排水を1サイクルとする濾過運転を連続して2ヶ月間実施したが、接着固定部付近に中空糸膜の損傷は発生しなかった。 [0034] The hollow fiber membrane module, feed water 30 l / min of pure water for 30 seconds, 13 minutes filtration, 30 liters / minute air scrubbing the air for 1 minute, filtration operation to drain the 1 cycle of 30 seconds was 2 months carried out continuously, but damage to the hollow fiber membrane was generated in the vicinity of the bonded portion.

【0035】比較例3 実施例1の中空糸膜モジュールにおいて、保護筒の孔(開口部)の位置を接着固定部の内面から2mmの位置に8個、20mmの位置に8個にした以外は、同様の構造にした中空糸膜モジュールを製作した。 [0035] In the hollow fiber membrane module of Comparative Example 3 Example 1, eight positions from the inner surface of the adhesive fixing portion at a position of 2mm holes of the protective tube (aperture), except that the eight to the position of 20mm was fabricated hollow fiber membrane module was similar structure.

【0036】この中空糸膜モジュールについて、実施例1と同一条件で濾過運転を連続して2ヶ月間実施したところ、接着固定部付近の中空糸膜に13本の中空糸切れが発生していた。 [0036] The the hollow fiber membrane module, was 2 months performed continuously filtered operating under the same conditions as in Example 1, 13 present hollow fiber breakage in the hollow fiber membrane near the bonded portion was generated .

【0037】 [0037]

【発明の効果】上述したように本発明によれば、中空糸膜のエアスクラビング時の揺れを抑制する保護筒を設けてはいるが、接着固定部から少なくとも10mmまでの筒面を流体が流通不能な閉面にし、10〜60mmの範囲に流通自由な開口部を設けるようにしたので、保護筒内に入ったエアを接着固定部から少なくとも10mmまでの領域にエア溜まりを形成させ、このエア溜まりにより懸濁物質が堆積させないようにするため、接着固定部付近で中空糸膜を堆積物により劣化させたり、その劣化による中空糸膜切れを起こさないようにする。 Effects of the Invention According to the present invention as described above, but are provided with d ask inhibiting protective tube shaking during rubbing of the hollow fiber membrane, the fluid cylinder surface up to at least 10mm from the bonded portion Distribution the non-closed surfaces, since the provided free openings distributed in the range of 10 to 60 mm, to form a reservoir air to enter the air into the protective tube in the region up to at least 10mm from the bonded portion, the air so that suspended solids are not deposited by reservoir, or degrade the hollow fiber membrane by deposits in the vicinity of the adhesive fixing portions, so as not to cause the hollow fiber membrane breakage due to the deterioration.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】(A)は本発明の中空糸膜モジュールの実施形態を示す縦断面図、(B)は図(A)におけるX−X矢視断面図である。 1 (A) is a longitudinal sectional view showing an embodiment of a hollow fiber membrane module, (B) is X-X sectional view taken along the line in FIG. (A) view of the present invention.

【図2】(A)は本発明の中空糸膜モジュールの他の実施形態を示す縦断面図、(B)は図(A)におけるY− Figure 2 (A) is a longitudinal sectional view showing another embodiment of a hollow fiber membrane module of the present invention, in (B) Fig (A) Y-
Y矢視断面図である。 Y is an arrow sectional view.

【図3】従来の中空糸膜モジュールの一例を示す縦断面図である。 3 is a longitudinal sectional view showing an example of a conventional hollow fiber membrane module.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 ハウジング 2 中空糸膜束 3 接着固定部 4 保護筒 4o 開口部 5(被処理液体の)供給口 6 エア噴射口(ノズル) 7(被処理水とエアとの兼用)排出口 1 housing 2 hollow fiber membrane bundle 3 adhering fixing portion 4 protecting cylinder 4o opening 5 (the liquid to be treated) supply port 6 air injection ports (nozzles) 7 (water to be treated and combined with air) outlet

Claims (4)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 多本数の中空糸膜束の少なくとも一端を固定した接着固定部をハウジング上部に固定し、該中空糸膜束の固定端周囲を前記接着固定部から延長する保護筒で覆い、前記ハウジング下部にエアスクラビング用のエア噴射口を設け、前記ハウジング上部の前記接着固定部近傍にエア排出口を設けた中空糸膜モジュールにおいて、前記保護筒の筒面を前記接着固定部から少なくとも10mmまでを流体が流通不能な閉面にすると共に、前記接着固定部から10〜60mmの範囲に流通自由な開口部を設けた中空糸膜モジュール。 1. A bonding fixing portion which is fixed at least one end of the hollow fiber membrane bundle of the multi-number is fixed to the housing upper part, covering the fixed end around the hollow fiber membrane bundle with a protective tube extending from the bonded portion, the air injection port for air scrubbing on the housing lower part, at least 10mm in the hollow fiber membrane module provided with an air outlet to the adhesive fixing portion near the upper housing part, a cylindrical surface of the protective tube from the bonded portion the hollow fiber membrane module with fluid to a non distribution closed surface, provided with a free opening distribution in the range of 10~60mm from the adhesive fixing portion to.
  2. 【請求項2】 前記開口部が、前記エア排出口の入口中心を通る前記保護筒の横断面において、該保護筒横断面中心Oと前記エア排出口の入口中心とを結ぶ線分に対して該中心Oから左右に±30°ずつ臨む領域を除く前記保護筒の部分に配置されている請求項1に記載の中空糸膜モジュール。 Wherein said opening is in the transverse plane of the protective tube through the inlet center of the air outlet, with respect to a line segment connecting the inlet center of the protective tube cross section the center O and the air discharge port the hollow fiber membrane module according to claim 1 which is disposed in a portion of the protecting cylinder excluding a region facing each ± ​​30 ° from said central O to the left and right.
  3. 【請求項3】 前記開口部が、前記保護筒の下端部の一部を切り欠いた構造である請求項1又は2に記載の中空糸膜モジュール。 Wherein the opening is a hollow fiber membrane module according to claim 1 or 2, wherein a structure, with parts cut away, of the lower end of the protective tube.
  4. 【請求項4】 前記開口部が、前記保護筒の筒面を貫通する多数の孔である請求項1又は2に記載の中空糸膜モジュール。 Wherein said opening is a hollow fiber membrane module according to claim 1 or 2 which is a large number of holes through the tubular surface of the protective tube.
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US9604166B2 (en) 2011-09-30 2017-03-28 Evoqua Water Technologies Llc Manifold arrangement
US9925499B2 (en) 2011-09-30 2018-03-27 Evoqua Water Technologies Llc Isolation valve with seal for end cap of a filtration system
US10391432B2 (en) 2011-09-30 2019-08-27 Evoqua Water Technologies Llc Manifold arrangement
US9533261B2 (en) 2012-06-28 2017-01-03 Evoqua Water Technologies Llc Potting method
US9962865B2 (en) 2012-09-26 2018-05-08 Evoqua Water Technologies Llc Membrane potting methods
US9764289B2 (en) 2012-09-26 2017-09-19 Evoqua Water Technologies Llc Membrane securement device
US9815027B2 (en) 2012-09-27 2017-11-14 Evoqua Water Technologies Llc Gas scouring apparatus for immersed membranes
CN103506012A (en) * 2013-09-12 2014-01-15 广州中国科学院先进技术研究所 One-sided packaged U-shaped hollow fiber membrane element and component
US10322375B2 (en) 2015-07-14 2019-06-18 Evoqua Water Technologies Llc Aeration device for filtration system

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