JP3283008B2 - Filtration device and filtration method - Google Patents
Filtration device and filtration methodInfo
- Publication number
- JP3283008B2 JP3283008B2 JP09703499A JP9703499A JP3283008B2 JP 3283008 B2 JP3283008 B2 JP 3283008B2 JP 09703499 A JP09703499 A JP 09703499A JP 9703499 A JP9703499 A JP 9703499A JP 3283008 B2 JP3283008 B2 JP 3283008B2
- Authority
- JP
- Japan
- Prior art keywords
- hollow fiber
- fiber membrane
- filtration
- module
- membrane
- 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.)
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- Separation Using Semi-Permeable Membranes (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は中空糸膜モジュールを用
いて被処理液の濾過を行うための濾過装置及び濾過方法
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filtration device and a filtration method for filtering a liquid to be treated using a hollow fiber membrane module.
【０００２】[0002]
【従来の技術】従来、中空糸膜モジュールは、無菌水、
飲料水、高純度水の製造や、空気の浄化といった所謂精
密濾過の分野に於て多く使用されてきたが、近年、下水
処理場における二次処理、三次処理や浄化槽における固
液分離等の高汚濁性水処理用途に用いる検討が様々な形
で行われている。2. Description of the Related Art Conventionally, hollow fiber membrane modules have been constructed using sterile water,
It has been widely used in the field of so-called microfiltration such as the production of drinking water and high-purity water, and the purification of air. Various studies have been made for use in polluted water treatment applications.
【０００３】このような用途に用いる中空糸膜モジュー
ルは、濾過処理時における中空糸膜の目詰まりが大きい
ために、一定時間濾過処理後、空気を送って中空糸膜を
振動させて膜表面を洗浄したり、濾過処理と逆方向に処
理液を通水するなどの膜面洗浄を繰り返し行っている。Since the hollow fiber membrane module used for such an application has a large clogging of the hollow fiber membrane at the time of the filtration process, after the filtration process for a certain period of time, the air is sent to vibrate the hollow fiber membrane and the surface of the membrane is vibrated. Washing and membrane surface washing such as passing a treatment liquid in the opposite direction to the filtration treatment are repeatedly performed.
【０００４】しかしながら、これらの分野で用いられて
いる中空糸膜モジュールは、従来の精密濾過の分野にお
いて用いられてきた円形状や同心円状に中空糸膜を集束
して配置した円筒形タイプのものが殆んどであった。又
改良が施されるとしても、中空糸膜の充填率や充填形態
を変えるだけのものが多かった。However, the hollow fiber membrane modules used in these fields are of a cylindrical type in which hollow fiber membranes used in the field of conventional microfiltration are formed by concentrating and arranging hollow fiber membranes concentrically. Most were. Even if improvements are made, many of them merely change the filling rate and filling form of the hollow fiber membrane.
【０００５】[0005]
【発明が解決しようとする課題】このような従来の中空
糸膜モジュールを用いて高汚濁性水（例えば、ｓｓ≧５
０ｐｐｍ，ＴＯＣ≧１００ｐｐｍ）の濾過処理を行った
場合には、使用に伴い中空糸膜表面に付着した有機物等
の堆積物を介して、中空糸膜同士が固着（接着）して一
体化されることにより、モジュール内の中空糸膜の有効
膜面積が減少し、濾過流量の急激な低下がみられた。SUMMARY OF THE INVENTION Using such a conventional hollow fiber membrane module, highly polluting water (for example, ss ≧ 5) is used.
(0 ppm, TOC ≧ 100 ppm), the hollow fiber membranes are fixedly adhered (adhered) to each other via deposits such as organic substances adhered to the surface of the hollow fiber membrane during use. As a result, the effective membrane area of the hollow fiber membrane in the module was reduced, and a sharp decrease in the filtration flow rate was observed.
【０００６】又このようにして中空糸膜同士が固着して
一体化した中空糸膜モジュールを定期的に膜面洗浄や逆
洗を行う場合も、一旦固着一体化したモジュールの機能
回復は容易ではなく、洗浄効率の低下がみられた。In the case where the hollow fiber membrane module in which the hollow fiber membranes are fixed and integrated as described above is regularly cleaned and backwashed, it is not easy to recover the function of the module once fixed and integrated. No decrease in cleaning efficiency was observed.
【０００７】この問題の解決策として、集束型の中空糸
膜モジュールに換えて、中空糸膜をシート状に配置し、
中空糸膜の片端部あるいは両端部が、一つ或は異なる二
つのハウジング内の固定部材でそれぞれ開口状態を保ち
つつ固定されてなる中空糸膜モジュールであって、固定
部材の中空糸膜に垂直な断面の形状がいずれも細長いほ
ぼ矩形である、平型中空糸膜モジュールが提案されてい
る。この様な中空糸膜モジュールは、通常中空糸膜の繊
維軸が、垂直或いは水平方向となるよう配設して用いら
れる。As a solution to this problem, a hollow fiber membrane is arranged in a sheet form instead of a bundled hollow fiber membrane module.
A hollow fiber membrane module in which one end or both ends of a hollow fiber membrane is fixed while maintaining an open state with a fixing member in one or two different housings, and is perpendicular to the hollow fiber membrane of the fixing member. Flat hollow fiber membrane modules, each of which has a slender, substantially rectangular shape with a simple cross section, have been proposed. Such a hollow fiber membrane module is usually used by disposing the fiber axis of the hollow fiber membrane in a vertical or horizontal direction.
【０００８】このような平型中空糸膜モジュールは、円
筒型タイプの中空糸膜モジュールに比較して、膜面洗浄
をする際、中空糸膜表面を均等に洗浄することが極めて
容易となるので、濾過効率の低下を抑えることができ、
高汚濁性水の濾過を好適に行うことができる。In such a flat hollow fiber membrane module, it is extremely easy to evenly clean the surface of the hollow fiber membrane when cleaning the membrane surface, as compared with the cylindrical type hollow fiber membrane module. , Can suppress the decrease in filtration efficiency,
Filtration of highly polluting water can be suitably performed.
【０００９】しかしながら、平型中空糸膜モジュールを
用いて、中空糸膜を弛緩させて固定し、下方からのエア
ーのスクラビングで膜面洗浄を行うと、エアーバブルが
中空糸膜シートを通過することによって、中空糸膜が部
分的に収束して膜の固着一体化が若干起き、チャンネル
が形成される。そして、このチャンネルを集中的にエア
ーバブルが通過するため、モジュール全体に効率良く膜
面洗浄が行われない場合がある。However, when the hollow fiber membrane is loosened and fixed using the flat hollow fiber membrane module and the membrane surface is cleaned by scrubbing air from below, air bubbles pass through the hollow fiber membrane sheet. As a result, the hollow fiber membrane partially converges, and the adhesion and integration of the membrane slightly occur to form a channel. Since air bubbles pass through this channel intensively, the entire module may not be efficiently cleaned.
【００１０】又中空糸膜の弛緩を充分にとって（例えば
弛緩率５％）平型中空糸膜モジュールを固定した場合、
水中では中空糸膜は浮力を受けて大きく揺動する。When the hollow fiber membrane is sufficiently relaxed (for example, the relaxation rate is 5%) and the flat hollow fiber membrane module is fixed,
Underwater, the hollow fiber membrane swings greatly due to buoyancy.
【００１１】そして、その中空糸膜の大きな揺動により
中空糸膜集束端部を固定するポッティング樹脂硬化部と
個々の中空糸膜の基部における座屈による応力が大きく
なり、界面部分の強度が低下する結果、樹脂硬化部付近
で中空糸膜の亀裂や切損が生じ、短期間の使用でモジュ
ール機能を消滅させる原因となる等の問題がある。[0011] The large swinging of the hollow fiber membrane increases the stress due to buckling between the potting resin hardened portion for fixing the hollow fiber membrane converging end and the base of each hollow fiber membrane, and the strength of the interface decreases. As a result, there is a problem that a crack or breakage of the hollow fiber membrane occurs in the vicinity of the cured resin portion, which causes the module function to disappear in a short use.
【００１２】[0012]
【課題を解決するための手段】本発明は、平型中空糸膜
モジュールの膜面洗浄を効率よくことが行うことがで
き、なおかつポッティング樹脂硬化部と中空糸膜の界面
付近で中空糸膜の損傷を生じさせないような濾過装置お
よび濾過方法の提供を目的としてなされたものである。SUMMARY OF THE INVENTION According to the present invention, it is possible to efficiently clean the surface of a flat hollow fiber membrane module and to form a hollow fiber membrane near the interface between the potting resin cured portion and the hollow fiber membrane. The purpose of the present invention is to provide a filtering device and a filtering method that do not cause damage.
【００１３】即ち、本発明の要旨は、平型中空糸膜モジ
ュールの下方からエアーによるスクラビングを連続的若
しくは断続的に行いながら被処理液を濾過する濾過装置
であって、該平型中空糸膜モジュールは、中空糸膜をシ
ート状に配列し、弛緩率を０〜３％以内としてできるだ
け緊張させてなることを特徴とする濾過装置にある。[0013] That is, the gist of the present invention is a filtration device for filtering a liquid to be treated while air scrubbing continuously or intermittently performed according to the lower side of the flat-type hollow fiber membrane module, the flat-type hollow fiber membrane The module has a hollow fiber membrane
It can be arranged in a sheet shape and the relaxation rate can be set within 0 to 3%
The filtration device is characterized by being strained .
【００１４】中空糸膜が、ポリオレフィン製中空糸膜で
あると、強伸度が高く、エアースクラビングによる劣化
が更に低減され好ましい。中空糸膜の孔径が、０．０１
〜１μｍであると、汚濁性の高い被処理水の濾過を良好
に行うことができ好ましい。中空糸膜の空孔率が、２０
〜９０％であると、高い濾過性能と膜強度とを有する濾
過装置となり好ましい。When the hollow fiber membrane is a polyolefin hollow fiber membrane, high elongation is high and deterioration due to air scrubbing is further reduced, which is preferable. The pore size of the hollow fiber membrane is 0.01
When it is 1 μm, filtration of the water to be treated having high turbidity can be favorably performed, which is preferable. The porosity of the hollow fiber membrane is 20
When it is 90%, it becomes a filtration device having high filtration performance and membrane strength, which is preferable.
【００１５】また、中空糸膜の膜厚が、５〜３００μｍ
であると、高い濾過性能と膜強度とを有する濾過装置と
なり好ましい。中空糸膜の外径が、２０〜２０００μｍ
であると、容積効率の高い濾過装置とすることができ好
ましい。好ましくは、中空糸膜が水平方向に配設されて
いると、中空糸膜の洗浄効率が更に向上する。The hollow fiber membrane has a thickness of 5 to 300 μm.
Is preferable because the filtration device has high filtration performance and membrane strength. The outer diameter of the hollow fiber membrane is 20 to 2000 μm
Is preferable because a filtration device having high volumetric efficiency can be obtained. Preferably, when the hollow fiber membrane is disposed in the horizontal direction, the cleaning efficiency of the hollow fiber membrane is further improved.
【００１６】また、本発明の要旨は、中空糸膜をシート
状に配列した平型中空糸膜モジュールの中空糸膜の弛緩
率を、０〜３％以内としてできるだけ緊張させ、下方か
らエアーによるスクラビングを連続的若しくは断続的に
行いながら被処理液を濾過することを特徴とする濾過方
法にある。The gist of the present invention is that a hollow fiber membrane is formed into a sheet.
Of Hollow Fiber Membrane of Flat Hollow Fiber Membrane Module
The filtration method is characterized in that the liquid to be treated is filtered while the scrubbing with air is performed continuously or intermittently from below while the tension is set as low as possible within the range of 0 to 3% .
【００１７】[0017]
【発明の実施の形態】以下に本発明を図面に従い詳細に
説明する。図１は、本発明の濾過装置および濾過方法の
一例を示す模式図であり、３個の平型中空糸膜モジュー
ルを、槽内あるいは缶体内に、シート面が水平となるよ
うに、なおかつ中空糸を弛緩させずに固定して上下に積
層したときの斜視図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic view showing an example of a filtration device and a filtration method of the present invention. Three flat hollow fiber membrane modules are placed in a tank or a can so that the sheet surface is horizontal and hollow. It is a perspective view at the time of fixing a thread without loosening and stacking up and down.
【００１８】図２は、本発明の濾過装置および濾過方法
の他の一例を示す模式図であり、図１で示した支持方法
に於て、中央に位置する平型モジュールを、その中空糸
の長手方向が、隣接する平型モジュールの中空糸の長手
方向に対して垂直になるように固定した場合の模式図で
ある。ここで、１は集水管、２は中空糸膜、３は中空糸
膜集束端部、４は散気板をそれぞれ示している。FIG. 2 is a schematic view showing another example of the filtering device and the filtering method of the present invention. In the supporting method shown in FIG. 1, the flat module located at the center is replaced with the hollow fiber. It is a schematic diagram in the case of fixing so that a longitudinal direction may become perpendicular to the longitudinal direction of the hollow fiber of an adjacent flat type module. Here, 1 is a water collecting pipe, 2 is a hollow fiber membrane, 3 is a bundle end of the hollow fiber membrane, and 4 is an air diffuser plate.
【００１９】本発明で用いる平型中空糸膜モジュール
は、シート状に配列された中空糸膜２がその両端あるい
は片端を開口状に保った状態でポッティング用樹脂によ
って固定され、中空糸膜２の開口部は集水管に通じてい
る。In the flat hollow fiber membrane module used in the present invention, the hollow fiber membranes 2 arranged in a sheet shape are fixed by a potting resin while both ends or one end of the hollow fiber membranes 2 are kept in an open state. The opening communicates with the water collection pipe.
【００２０】中空糸膜２の片端のみが開口状で集水管１
に接続されているものに限らず、中空糸膜２の両端が開
口状を保った状態で固定され、両端に集水管を有するも
のであっても差し支えない。即ち、それぞれの図におい
て中空糸集束端部３が集水管であっても構わない。Only one end of the hollow fiber membrane 2 is open and the water collecting pipe 1
The hollow fiber membrane 2 may be fixed in a state where both ends thereof are kept open and have water collecting pipes at both ends. That is, in each of the drawings, the hollow fiber collecting end 3 may be a water collecting pipe.
【００２１】モジュールの固定に際して、中空糸膜２は
できるだけ緊張させた方が望ましく、中空糸の弛緩率は
０〜３％好しくは０〜１％であることが必要である。モ
ジュールを固定した状態で中空糸が完全に緊張した状態
を保持することは、モジュール内の全ての中空糸の長さ
が一律ではないので、実際には困難である。しかしモジ
ュールを固定した状態で中空糸の弛緩率が３％以内より
好しくは１％以内であれば、効果を発揮するには差し支
えない。In fixing the module, it is desirable that the hollow fiber membrane 2 be as tight as possible, and the relaxation rate of the hollow fiber must be 0 to 3%, preferably 0 to 1%. It is actually difficult to keep the hollow fibers completely tensioned while the module is fixed, because the lengths of all the hollow fibers in the module are not uniform. However, if the relaxation rate of the hollow fiber in the state where the module is fixed is within 3%, preferably within 1%, there is no problem in exhibiting the effect.
【００２２】モジュールの固定方法は、槽内や缶体内で
スタンドやクランプで固定する方法や専用の治具を用い
て固定するなど任意の方法が用いられるが、エアースク
ラビング等の際にモジュールが動くことのないような固
定方法であれば構わない。The module can be fixed by any method such as a method in which the module is fixed in a tank or a can with a stand or a clamp, or a method in which the module is fixed by using a special jig, but the module moves during air scrubbing or the like. It does not matter if the fixing method does not cause any problem.
【００２３】散気板４は、エアースクラビングするため
のものであるが、モジュール全体にエアーバブルが当た
るようなものであればどのようなものでも構わない。従
って、図では散気板になっているが、パイプに孔を開け
たものや多孔性の材料で構成された散気管を用いても差
し支えない。The diffuser plate 4 is for air scrubbing, but may be any as long as the air bubbles hit the entire module. Therefore, although a diffuser plate is shown in the drawing, a diffused pipe made of a porous material or a pipe with a hole may be used.
【００２４】散気板あるいは散気管にブロアーを接続
し、濾過運転中連続的あるいは断続的にブロアーから送
風することでバブリングを行い、膜面洗浄を行う。A blower is connected to a diffuser plate or a diffuser tube, and bubbling is performed by continuously or intermittently blowing air from the blower during the filtration operation to clean the membrane surface.
【００２５】複数のモジュールを上下に積層する場合に
は、図１の如く中空糸膜の長手方向が平行になるように
又は図２のように該長手方向が互いに直角に交差するよ
うに積層する方法等が考えられる。又、モジュールを積
層する際の隣接するモジュール間の間隔は、缶体や処理
層のコンパクト化を考慮すると狭い方が好ましいが、モ
ジュールの大きさ、モジュール本数、エアースクラビン
グの条件等を考慮してモジュール間の間隔を選択するこ
とができる。When a plurality of modules are stacked vertically, the modules are stacked such that the longitudinal directions of the hollow fiber membranes are parallel as shown in FIG. 1 or such that the longitudinal directions cross each other at right angles as shown in FIG. A method is conceivable. In addition, the interval between adjacent modules when stacking the modules is preferably narrower in consideration of the compactness of the can body and the treatment layer, but in consideration of the size of the modules, the number of modules, the conditions of air scrubbing, and the like. The spacing between modules can be selected.
【００２６】中空糸膜２としては、例えばセルロース
系、ポリオレフィン系、ポリビニルアルコール系、ＰＭ
ＭＡ系、ポリスルフォン系等の各種材料からなるものが
使用でき、特にはポリエチレン、ポリプロピレン等のポ
リオレフィンは強伸度が高く好ましい。As the hollow fiber membrane 2, for example, cellulose, polyolefin, polyvinyl alcohol, PM
Materials composed of various materials such as MA-based and polysulfone-based materials can be used. In particular, polyolefins such as polyethylene and polypropylene are preferable because of their high elongation.
【００２７】又バクテリアの除去を目的とする場合の孔
径は０．２μｍ以下であることが必須となり、有機物や
ウイルスの除去を目的とする場合には分画分子量数万か
ら数十万の限外濾過膜を用いる場合もある。When removing bacteria, the pore size must be 0.2 μm or less. When removing organic substances and viruses, the molecular weight cut-off is in the range of tens to hundreds of thousands. In some cases, a filtration membrane is used.
【００２８】中空糸膜の表面特性としては、エチレン−
酢酸ビニル共重合体の鹸化物の如き重合体を保持して表
面に親水性基等を持ついわゆる恒久親水化膜であること
が望ましい。表面が疎水性の中空糸膜であると、被処理
液中の有機物と中空糸膜表面との間に疎水性相互作用が
働き膜面への有機物吸着が発生し、それが膜面閉塞につ
ながり濾過寿命が短くなる。As the surface characteristics of the hollow fiber membrane, ethylene-
It is desirable that the film is a so-called permanent hydrophilized film that holds a polymer such as a saponified product of a vinyl acetate copolymer and has a hydrophilic group or the like on the surface. If the surface is a hydrophobic hollow fiber membrane, hydrophobic interaction between organic matter in the liquid to be treated and the surface of the hollow fiber membrane will work, causing organic matter to be adsorbed to the membrane surface, which will lead to membrane surface blockage. The filtration life is shortened.
【００２９】吸着由来の目詰まりは膜面洗浄による濾過
性能回復も一般には難しい。恒久親水化膜を用いること
により有機物と中空糸膜表面との疎水性相互作用を減少
させることができ、有機物の吸着を抑えることができ
る。In general, it is difficult to recover the filtration performance by washing the membrane surface due to the clogging caused by the adsorption. By using the permanent hydrophilizing membrane, the hydrophobic interaction between the organic substance and the surface of the hollow fiber membrane can be reduced, and the adsorption of the organic substance can be suppressed.
【００３０】本願発明の濾過装置及び濾過方法によれ
ば、平型モジュールに配設された中空糸膜を弛緩させず
緊張状態にすることで、中空糸膜同士が収束したり、固
着一体化し難くなり、下方からのエアースクラビングに
対してチャンネルが形成され難くなる。従って、モジュ
ール内の中空糸膜全体にエアーバブルが均等に当たり易
くなり、膜面洗浄がモジュール全体で効率よく行われ
る。According to the filtering device and the filtering method of the present invention, the hollow fiber membranes provided in the flat module are made to be in a tensioned state without being relaxed, so that the hollow fiber membranes are hardly converged or fixedly integrated. This makes it difficult to form a channel for air scrubbing from below. Therefore, the air bubbles can easily hit the entire hollow fiber membrane in the module, and the membrane surface can be efficiently cleaned throughout the module.
【００３１】また、中空糸膜が被処理液中で大きく揺動
しないので、中空糸膜表面を流れるエアーと被処理液の
混合流の流速が向上し、中空糸膜の洗浄効果を更に向上
させることもできる。Further, since the hollow fiber membrane does not fluctuate greatly in the liquid to be treated, the flow velocity of the mixed flow of the air and the liquid to be treated flowing on the surface of the hollow fiber membrane is improved, and the cleaning effect of the hollow fiber membrane is further improved. You can also.
【００３２】又、中空糸膜が緊張しているため、中空糸
膜は浮力を受けても、中空糸膜の揺動の幅が抑えられる
ため、中空糸膜集束端部を固定するポッティング樹脂硬
化部と個々の中空糸膜の基部における座屈による応力を
少なくすることができ、その部分の中空糸膜の損傷を防
ぐことができる。Also, since the hollow fiber membrane is in tension, the swinging width of the hollow fiber membrane is suppressed even if the hollow fiber membrane is subjected to buoyancy. The stress due to buckling at the base and at the base of each hollow fiber membrane can be reduced, and damage to the hollow fiber membrane at that part can be prevented.
【００３３】尚、シート面を水平にし、中空糸膜を緊張
させてモジュールを固定し、複数のモジュールを積層し
て缶体内あるいは槽内に配置する場合、隣接するモジュ
ールの中空糸膜の長手方向が互いに垂直に交差するよう
にモジュールを固定することで、下側のモジュールで若
干形成された、エアーバブルのチャンネルを打ち消し、
それぞれのモジュールに対してエアーバブルが均等に当
たり易くなる。When the module is fixed by leveling the sheet surface, tensioning the hollow fiber membrane, and stacking a plurality of modules in a can or a tank, the longitudinal direction of the hollow fiber membrane of the adjacent module is required. By fixing the modules so that they intersect each other vertically, the air bubble channels formed slightly by the lower module are canceled out,
The air bubbles easily hit each module evenly.
【００３４】[0034]
【実施例】以下実施例により本発明を具体的に説明す
る。 〔実施例１、比較例１〕エチレン−酢酸ビニル共重合体
の鹸化物を表面に保持したポリエチレン中空糸膜からな
る膜面積２ｍ2の平型中空糸膜モジュールを用いて、モ
ジュール固定時の弛緩率の違いによる濾過運転時の差圧
上昇の比較を行った。モジュールをタンク内にシート面
が水平になるように固定、支持し、このタンク内に２０
０ｐｐｍの酵母を懸濁させた水を満たし、この水を原水
として濾過を行った。濾過方法は、モジュールを原水に
完全に浸漬した状態にし、集水管とポンプの入り口側を
つなぎ、ポンプで吸引することにって濾過を行った。The present invention will be described in detail with reference to the following examples. Example 1, Comparative Example 1 Relaxation at the time of module fixing using a flat hollow fiber membrane module having a membrane area of 2 m 2 consisting of a polyethylene hollow fiber membrane having a saponified ethylene-vinyl acetate copolymer held on the surface. A comparison was made of the differential pressure rise during the filtration operation due to the difference in the rate. The module is fixed and supported in the tank so that the seat surface is horizontal.
The suspension was filled with water in which 0 ppm of yeast was suspended, and filtration was performed using this water as raw water. The filtration method was such that the module was completely immersed in raw water, the collection pipe was connected to the inlet side of the pump, and suction was performed with a pump to perform filtration.
【００３５】濾過流量は一定で、３３０ｍｌ／ｍｉｎ
（ＬＶ＝０．００９９ｍ／ｈ）に設定し、５分間濾過、
５分間停止（ポンプ停止）を１サイクルとして運転を行
った。尚、運転中（濾過時、停止時両方共）はモジュー
ルに対して、シート面の下方から連続的に３５Ｎ１／ｍ
ｉｎのエアーでスクラビング洗浄を行った。モジュール
を支持したときの中空糸膜の弛緩率は０．５％と比較例
として４％でそれぞれ濾過を行った。The filtration flow rate is constant and is 330 ml / min.
(LV = 0.999m / h), filtered for 5 minutes,
The operation was performed with a 5-minute stop (pump stop) as one cycle. During operation (both at the time of filtration and at the time of stop), the module is continuously 35 N1 / m from below the seat surface.
Scrubbing cleaning was performed with air in. Filtration was performed at a relaxation rate of the hollow fiber membrane of 0.5% when the module was supported and 4% as a comparative example.
【００３６】図３は、それぞれの弛緩率を持たせてモジ
ュールを槽内で支持し、上記の条件で連続運転したとき
の差圧（吸引圧）の挙動を表したグラフである。弛緩率
０．５％のほうが４％の場合より差圧の上昇が抑えら
れ、安定した濾過が持続できることがわかる。FIG. 3 is a graph showing the behavior of the differential pressure (suction pressure) when the module is supported in the tank with each relaxation rate and the module is continuously operated under the above conditions. It can be seen that the increase in differential pressure is suppressed when the relaxation rate is 0.5% than when the relaxation rate is 4%, and stable filtration can be maintained.
【００３７】[0037]
【発明の効果】本発明の濾過装置及び濾過方法において
は、濾過運転中の連続的あるいは断続的なエアースクラ
ビングによる膜面洗浄の際に、モジュールの中空糸膜全
体にエアーが当たるとともに、被処理液とエアーの混合
流が高い流速で膜表面を流れるので、膜表面の洗浄効率
が向上し、高い濾過流量を長期間保つことが可能であ
る。又、中空糸膜とポッティング樹脂硬化部界面への座
屈による応力の集中を少なくすることができ、中空糸膜
の損傷を抑えることができる。According to the filtering apparatus and the filtering method of the present invention, when the membrane surface is cleaned by continuous or intermittent air scrubbing during the filtration operation, air is applied to the entire hollow fiber membrane of the module, and Since the mixed flow of the liquid and the air flows on the membrane surface at a high flow rate, the efficiency of cleaning the membrane surface is improved, and a high filtration flow rate can be maintained for a long time. Further, concentration of stress due to buckling at the interface between the hollow fiber membrane and the potting resin cured portion can be reduced, and damage to the hollow fiber membrane can be suppressed.
【図１】図１は、本発明の濾過装置及び濾過方法の一例
を示す斜視図である。FIG. 1 is a perspective view showing one example of a filtration device and a filtration method of the present invention.
【図２】図２は、本発明の濾過装置及び濾過方法の他の
一例を示す斜視図である。FIG. 2 is a perspective view showing another example of the filtration device and the filtration method of the present invention.
【図３】図３は、中空糸膜の弛緩率が０．５％と４％の
時のモジュールで連続運転した時の差圧の挙動を表した
グラフである。FIG. 3 is a graph showing the behavior of the differential pressure when the module is continuously operated when the relaxation rate of the hollow fiber membrane is 0.5% and 4%.
１ 集水管 ２ 中空糸膜 ３ 中空糸膜集束端部 ４ 散気板 DESCRIPTION OF SYMBOLS 1 Water collecting pipe 2 Hollow fiber membrane 3 End part of hollow fiber membrane bundle 4 Air diffuser plate
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−187219（ＪＰ，Ａ) 特開 平５−42220（ＪＰ，Ａ) 特開 平３−47271（ＪＰ，Ａ) 特開 平２−174915（ＪＰ，Ａ) 特開 平６−238273（ＪＰ，Ａ) 特開 平５−57115（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B01D 65/02 520 B01D 63/02 B01D 71/26 C02F 1/44 ZAB ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-187219 (JP, A) JP-A-5-42220 (JP, A) JP-A-3-47271 (JP, A) JP-A-2- 174915 (JP, A) JP-A-6-238273 (JP, A) JP-A-5-57115 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) B01D 65/02 520 B01D 63/02 B01D 71/26 C02F 1/44 ZAB
Claims (8)
ーによるスクラビングを連続的若しくは断続的に行いな
がら被処理液を濾過する濾過装置であって、該平型中空
糸膜モジュールは、中空糸膜をシート状に配列し、弛緩
率を０〜３％以内としてできるだけ緊張させてなること
を特徴とする濾過装置。1. A filtration device for filtering a continuous or intermittent performed while the liquid to be treated scrubbing by air from below the flat-type hollow fiber membrane module, the flat-type hollow
The fiber membrane module arranges hollow fiber membranes in a sheet and relaxes them.
A filtration apparatus characterized in that the strain is as tight as possible with the rate being within 0 to 3% .
であることを特徴とする請求項１記載の濾過装置。2. The filtration device according to claim 1, wherein the hollow fiber membrane is a polyolefin hollow fiber membrane.
あることを特徴とする請求項１又は２記載の濾過装置。3. The filtration device according to claim 1, wherein the hollow fiber membrane has a pore size of 0.01 to 1 μm.
ることを特徴とする請求項１〜３の何れか１項に記載の
濾過装置。4. The filter according to claim 1, wherein the porosity of the hollow fiber membrane is 20 to 90%.
ることを特徴とする請求項１〜４の何れか１項に記載の
濾過装置。5. The filtration device according to claim 1, wherein the hollow fiber membrane has a thickness of 5 to 300 μm.
であることを特徴とする請求項１〜５の何れか１項に記
載の濾過装置。6. The hollow fiber membrane has an outer diameter of 20 to 2000 μm.
The filtering device according to any one of claims 1 to 5, wherein
とを特徴とする特徴とする請求項１〜６の何れか１項に
記載の濾過装置。7. The filtering device according to claim 1, wherein the hollow fiber membrane is disposed in a horizontal direction.
糸膜モジュールの中空糸膜の弛緩率を、０〜３％以内と
してできるだけ緊張させ、下方からエアーによるスクラ
ビングを連続的若しくは断続的に行いながら被処理液を
濾過することを特徴とする濾過方法。8. A flat hollow in which hollow fiber membranes are arranged in a sheet shape.
The relaxation rate of the hollow fiber membrane of the fiber membrane module is within 0-3%
And by as much as possible tension, filtration method characterized by filtering the liquid to be treated while air scrubbing in a continuous or intermittent by from below.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09703499A JP3283008B2 (en) | 1999-04-02 | 1999-04-02 | Filtration device and filtration method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09703499A JP3283008B2 (en) | 1999-04-02 | 1999-04-02 | Filtration device and filtration method |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17070193A Division JP2946072B2 (en) | 1993-07-09 | 1993-07-09 | Filtration method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11314026A JPH11314026A (en) | 1999-11-16 |
| JP3283008B2 true JP3283008B2 (en) | 2002-05-20 |
Family
ID=14181235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09703499A Expired - Fee Related JP3283008B2 (en) | 1999-04-02 | 1999-04-02 | Filtration device and filtration method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3283008B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7708888B2 (en) | 1995-08-11 | 2010-05-04 | Zenon Technology Partnership | Apparatus for withdrawing permeate using an immersed vertical skein of hollow fibre membranes |
| USRE42669E1 (en) | 1995-08-11 | 2011-09-06 | Zenon Technology Partnership | Vertical cylindrical skein of hollow fiber membranes and method of maintaining clean fiber surfaces |
| CN104043334A (en) * | 2014-05-20 | 2014-09-17 | 上海沛杰过滤技术有限公司 | Split hollow fiber film curtain-type assembly and membrane unit composed of same |
| US8852438B2 (en) | 1995-08-11 | 2014-10-07 | Zenon Technology Partnership | Membrane filtration module with adjustable header spacing |
| CN105642128A (en) * | 2015-12-31 | 2016-06-08 | 王春望 | Modified polyurethane hollow fiber membrane for industrial water treatment |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002361055A (en) * | 2001-06-12 | 2002-12-17 | Mitsubishi Rayon Co Ltd | Filtration membrane and water purifier and membrane module using the same |
| JP2010142782A (en) * | 2008-12-22 | 2010-07-01 | Daiki Ataka Engineering Co Ltd | Membrane separation apparatus |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0734852B2 (en) * | 1988-12-28 | 1995-04-19 | 旭化成工業株式会社 | Method for manufacturing hollow fiber microfilter bundle |
| JPH0347271A (en) * | 1989-07-14 | 1991-02-28 | Terumo Corp | Liquid treatment device |
| JPH0651099B2 (en) * | 1990-11-21 | 1994-07-06 | 荏原インフイルコ株式会社 | Hollow fiber membrane module and hollow fiber membrane filtration device |
| US5221474A (en) * | 1990-12-28 | 1993-06-22 | Terumo Kabushiki Kaisha | Transfusion filtering device |
| JPH0557115A (en) * | 1991-09-03 | 1993-03-09 | Mitsui Toatsu Chem Inc | Water permeable sheet and drain bag for garbage prepared from the sheet |
| JPH06238273A (en) * | 1993-02-17 | 1994-08-30 | Mitsubishi Rayon Eng Co Ltd | Membrane separation-type water purification |
-
1999
- 1999-04-02 JP JP09703499A patent/JP3283008B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7708888B2 (en) | 1995-08-11 | 2010-05-04 | Zenon Technology Partnership | Apparatus for withdrawing permeate using an immersed vertical skein of hollow fibre membranes |
| USRE42669E1 (en) | 1995-08-11 | 2011-09-06 | Zenon Technology Partnership | Vertical cylindrical skein of hollow fiber membranes and method of maintaining clean fiber surfaces |
| US8075776B2 (en) | 1995-08-11 | 2011-12-13 | Zenon Technology Partnership | Apparatus for withdrawing permeate using an immersed vertical skein of hollow fibre membranes |
| US8852438B2 (en) | 1995-08-11 | 2014-10-07 | Zenon Technology Partnership | Membrane filtration module with adjustable header spacing |
| CN104043334A (en) * | 2014-05-20 | 2014-09-17 | 上海沛杰过滤技术有限公司 | Split hollow fiber film curtain-type assembly and membrane unit composed of same |
| CN104043334B (en) * | 2014-05-20 | 2016-08-17 | 桐乡市健民过滤材料有限公司 | A kind of film unit being made up of split type hollow-fibre membrane curtain assembly |
| CN105642128A (en) * | 2015-12-31 | 2016-06-08 | 王春望 | Modified polyurethane hollow fiber membrane for industrial water treatment |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11314026A (en) | 1999-11-16 |
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