JPH07289860A - Cleaning method of hollow fiber membrane module - Google Patents
Cleaning method of hollow fiber membrane moduleInfo
- Publication number
- JPH07289860A JPH07289860A JP8658594A JP8658594A JPH07289860A JP H07289860 A JPH07289860 A JP H07289860A JP 8658594 A JP8658594 A JP 8658594A JP 8658594 A JP8658594 A JP 8658594A JP H07289860 A JPH07289860 A JP H07289860A
- Authority
- JP
- Japan
- Prior art keywords
- hollow fiber
- fiber membrane
- air
- cleaning
- port
- 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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Links
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、液体のろ過操作を行な
うための中空糸膜モジュールに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow fiber membrane module for performing a liquid filtering operation.
【０００２】[0002]
【従来の技術】一般の工業用水には、多くのＳＳ成分、
微粒子、ゴミ、細菌類、藻類、などが含まれており、こ
のまま使用されると、用水配管の詰まり、細菌の増殖、
ライン中のスケール堆積などのトラブルを生じる原因と
なりやすい。従来、これらの水中混入成分を除去するた
めに、砂ろ過、凝集ろ過、凝集沈殿ろ過、カートリッジ
ろ過などの各種方法が用途に応じて使用されてきた。こ
れらの一般ろ過法に変わる新規な手法として、最近は多
孔質の中空糸膜によるろ過が実用化され始めつつある。
中空糸膜による水処理、ろ過は、近年急速に普及し、そ
の適用分野も年々広くなりつつある。2. Description of the Related Art In general industrial water, many SS components,
It contains fine particles, dust, bacteria, algae, etc., and if used as is, clogging of water pipes, bacterial growth,
It is likely to cause problems such as scale accumulation in the line. Conventionally, various methods such as sand filtration, coagulation filtration, coagulation sedimentation filtration, and cartridge filtration have been used in order to remove these components mixed in water depending on the application. As a new method replacing these general filtration methods, recently, filtration using a porous hollow fiber membrane has begun to be put into practical use.
Water treatment and filtration using hollow fiber membranes have been rapidly spreading in recent years, and their fields of application are also expanding year by year.
【０００３】中空糸膜のろ過において、中空糸膜は何千
〜何万本を束に束ねた後に端部を接着剤で固定した形状
の商品形態に加工される。そして、これらの商品形態に
加工されたものは、中空糸膜モジュールと呼ばれてい
る。液体のろ過が可能な中空糸膜モジュールとしては従
来から多くの形態のものが提案されている。特に初期の
ものとしては、適度な前処理手段と組み合わせて使用さ
れるろ過モジュール、逆浸透ろ過を目的としたもの、透
析用途を目的としたものなどがあり、これらの用途を主
目的として、多くのモジュール形態が提案されており、
その主なものを挙げると、特公昭４８−２８３８０号公
報、特開昭４９−６９５５０号公報、特開昭５３−１０
０１７６号公報、などに記載されているものがある。こ
れらは、全て、液体のろ過を実施するにあたり、使い捨
て、あるいは、汚れが一定量以上付着した段階におい
て、清澄水または薬液水による洗浄やフラッシング処理
を実施するのが普通であった。In the filtration of hollow fiber membranes, the hollow fiber membranes are processed into a product form in which thousands to tens of thousands are bundled and the ends are fixed with an adhesive. The products processed into these product forms are called hollow fiber membrane modules. Many types of hollow fiber membrane modules capable of filtering liquid have been proposed in the past. Particularly, the initial ones include a filtration module used in combination with an appropriate pretreatment means, one for the purpose of reverse osmosis filtration, one for the purpose of dialysis, etc. The module form of is proposed,
The main ones thereof are JP-B-48-28380, JP-A-49-69550, and JP-A-53-10.
No. 0176, etc. In all of these, when performing filtration of liquid, it was usual to carry out cleaning or flushing treatment with clear water or chemical liquid water at the stage of being disposable or having a certain amount of dirt attached.
【０００４】これに対して、最近は、中空糸膜モジュー
ル形状に工夫をこらし、エアーにより中空糸膜の性能回
復を実施する方法が試みられている。特開昭６１−２６
３６０５号公報は、中空糸膜をＵ字型に組み込み、容器
に収納して使用するものであり、定期的に容器の下部に
設けられたエアー導入口からエアーを導入させてエアー
スクラビングにより中空糸膜を振動させ、膜面の堆積物
の除去を試みるものである。また、特開昭６０−２０６
４１５号公報は、中空糸膜を中心パイプの回りに配列さ
せた両端固定型モジュールであり、前記同様に容器に組
み込み、エアースクラビングにより中空糸膜膜面の堆積
物を除去するものである。これらの技術は、既に実用化
の検討が開始されている。On the other hand, recently, a method has been attempted in which the shape of the hollow fiber membrane module is devised and the performance of the hollow fiber membrane is recovered by air. JP-A-61-26
In Japanese Patent No. 3605, a hollow fiber membrane is incorporated into a U-shape and is housed in a container for use. Air is regularly introduced from an air inlet provided at the bottom of the container to perform air scrubbing to produce the hollow fiber. The film is vibrated to try to remove the deposits on the film surface. In addition, JP-A-60-206
Japanese Patent No. 415 is a fixed-end type module in which hollow fiber membranes are arranged around a central pipe, and is incorporated in a container in the same manner as described above to remove deposits on the surface of the hollow fiber membranes by air scrubbing. The practical application of these technologies has already started.
【０００５】また、モジュール構造の簡素化とエアース
クラビング効果の向上を狙い、中空糸膜束の中心にスク
ラビングエアー供給口を有した中心パイプを設けたモジ
ュールも使用されている（特開平 5-096136 ）。In addition, for the purpose of simplifying the module structure and improving the air scrubbing effect, a module in which a central pipe having a scrubbing air supply port is provided at the center of the hollow fiber membrane bundle is also used (Japanese Patent Laid-Open No. 5-096136). ).
【０００６】[0006]
【発明が解決しようとする課題】中空糸膜モジュールの
運転では、ろ過操作を継続していると膜面にゴミ、浮遊
物等が付着してろ過圧力が上昇するため定期的に物理洗
浄操作を行い膜面の付着成分を除去する必要がある。物
理洗浄操作の実施時期については、一定時間毎に物理洗
浄操作を行う場合や一定圧力に到達すれば物理洗浄操作
を行う場合などが一般的であるが、現状の洗浄操作で
は、下記の課題が残されている。すなわち、洗浄操作
は、ろ過操作を停止し実施するため効率の面からみても
できるだけ短時間に終了するのが好ましいが、最も効率
の高い物理洗浄方法の一つである空気スクラビング洗浄
の場合においては、実際は空気スクラビング、排水、給
水の各工程の合計が洗浄時間になり、かなりの時間がか
かる。In the operation of the hollow fiber membrane module, if the filtration operation is continued, dust, suspended matter, etc. adhere to the membrane surface and the filtration pressure rises, so that the physical cleaning operation is periodically performed. It is necessary to remove the adhering components on the film surface. Regarding the timing of performing the physical cleaning operation, it is common to perform the physical cleaning operation at regular time intervals or to perform the physical cleaning operation when a constant pressure is reached.However, the current cleaning operation has the following problems. It is left. That is, the washing operation is preferably finished in the shortest possible time from the viewpoint of efficiency because the filtration operation is stopped and performed, but in the case of air scrubbing washing, which is one of the most efficient physical washing methods, Actually, the sum of each process of air scrubbing, drainage, and water supply is the cleaning time, and it takes a considerable amount of time.
【０００７】洗浄時間は、ろ過操作を停止して行なわれ
るため、その間ろ過水は供給できなくなるが連続してろ
過水の供給必要な場合はろ過水タンクを設け、ポンプに
より供給する方法が一般的であり、洗浄時間が短いほう
がタンク容量も小さくてすむ。モジュールあるいはモジ
ュールユニットを２セット用い、ろ過と洗浄をそれぞれ
交互に行なう方法も採用されているがろ過水が連続的に
得られる反面、装置が大きくなりコストも高くなる。Since the filtration operation is stopped during the washing time, the filtered water cannot be supplied during that time, but if it is necessary to continuously supply the filtered water, a method is generally used in which a filtered water tank is provided and a pump is used. Therefore, the shorter the cleaning time, the smaller the tank capacity. A method is also adopted in which two sets of modules or module units are used and filtration and washing are alternately performed, but while the filtered water can be continuously obtained, the apparatus becomes large and the cost becomes high.
【０００８】そこで、洗浄方法の条件検討により洗浄時
間、洗浄間隔、洗浄空気量等の最適化が行われている。
しかし、汚れの多い原水のろ過運転では洗浄に要する時
間はかなり長くなるため、洗浄時間の短縮化できる手段
が求められていた。Therefore, by examining the conditions of the cleaning method, the cleaning time, the cleaning interval, the amount of cleaning air, etc. are optimized.
However, since the time required for cleaning in the filtration operation of raw water with a lot of dirt is considerably long, a means for shortening the cleaning time has been required.
【０００９】[0009]
【課題を解決するための手段】本発明の目的は、空気ス
クラビングを行った後、容器内を加圧した状態で排水を
行うことにより基本的に達成される。The object of the present invention is basically achieved by performing air scrubbing and then draining the container while the inside of the container is pressurized.
【００１０】特に限定されるものではないが、具体的に
は、以下の通りである。Although not particularly limited, it is specifically as follows.
【００１１】まず、中空糸膜モジュールとしては、原液
供給口、空気供給口、排水口、空気抜き口、ろ過水取り
出し口を有した中空糸膜モジュールを使用して、空気抜
き口、排水口を閉じて原液のろ過運転を行った後で、空
気スクラビング工程と排水工程からなる空気洗浄操作に
より中空糸膜のろ過性能回復を行う中空糸膜モジュール
の洗浄方法において、排水口を閉じ、空気供給口と空気
抜き口を開いて空気スクラビングを行った後、排水口を
開き、空気抜き口を閉じ、かつ空気供給口を開いて容器
内を供給空気により加圧した状態で排水を行うことによ
り達成される。First, as the hollow fiber membrane module, a hollow fiber membrane module having a stock solution supply port, an air supply port, a drain port, an air vent port, and a filtered water outlet port is used, and the air vent port and the drain port are closed. In the method of cleaning a hollow fiber membrane module in which the filtration performance of the hollow fiber membrane is recovered by performing an air cleaning operation consisting of an air scrubbing process and a drainage process after performing the filtration operation of the undiluted solution, the drain port is closed, the air supply port and the air vent This is achieved by opening the mouth and performing air scrubbing, then opening the drainage port, closing the air vent port, and opening the air supply port to drain the water while the inside of the container is pressurized by the supply air.
【００１２】[0012]
【作用】本発明及び従来例に関わる中空糸膜モジュール
を図１に示す。The hollow fiber membrane module according to the present invention and the conventional example is shown in FIG.
【００１３】ろ過される供給水は多孔質中空糸ろ過膜モ
ジュール（以下中空糸膜モジュールと呼ぶ）の原液供給
口３より供給され、中空糸膜の表面に開いている無数の
微細孔でろ過されて、ＳＳ成分や微粒子や、ごみ、細菌
などが除かれた清澄水だけが中空糸膜内部に透過し、ろ
過水出口７からろ過水として取り出される。中空糸膜モ
ジュールのろ過においては原水圧力が大きいほどろ過水
量は大きくなるが、ろ過時間の経過と共に前記ＳＳ成
分、微粒子などが膜面に付着して多かれ少なかれ中空糸
膜の目詰まりが生じ、同一圧力あたりのろ過水量が徐々
に低下していくのが普通である。よって、中空糸膜、モ
ジュールを長期に使用続けていくためには、中空糸膜の
目詰まりが進行してろ過水量が低下した適当な時点にお
いて、空気スクラビングをはじめとする洗浄操作を行な
い、目詰まり前に近いレベルにまで中空糸膜のろ過水量
を回復させることが必要となってくる。The feed water to be filtered is supplied from the undiluted solution feed port 3 of the porous hollow fiber filtration membrane module (hereinafter referred to as the hollow fiber membrane module), and is filtered by the innumerable fine pores open on the surface of the hollow fiber membrane. Then, only clear water from which SS components, fine particles, dust, bacteria, etc. have been removed permeates the inside of the hollow fiber membrane and is taken out from the filtered water outlet 7 as filtered water. In filtration of the hollow fiber membrane module, the larger the raw water pressure is, the larger the amount of filtered water becomes, but with the passage of filtration time, the SS components, fine particles, etc. adhere to the membrane surface and more or less clogging of the hollow fiber membrane occurs. The amount of filtered water per pressure usually decreases gradually. Therefore, in order to continue to use the hollow fiber membranes and modules for a long period of time, a cleaning operation such as air scrubbing is performed at an appropriate time when the hollow fiber membranes have been clogged and the amount of filtered water has decreased. It is necessary to recover the filtered water amount of the hollow fiber membrane to a level close to that before clogging.
【００１４】以下に、従来例と本発明の洗浄操作の方法
について、図面を用いて説明するが、これにより、特に
本発明が限定されるものではない。Hereinafter, a conventional example and a cleaning operation method according to the present invention will be described with reference to the drawings, but the present invention is not limited thereto.
【００１５】まず、従来例の手順を説明する。図１は一
般的なモジュール構造であり容器１に充填された中空糸
膜８は、ろ過により膜面の汚れを洗浄するため原液供給
口３を閉じ、洗浄用の空気供給口４、空気抜き口５を開
け空気スクラビングを行ない膜面の付着物を揺り落とす
操作が行なわれる。空気スクラビング終了後、洗浄用空
気供給口を閉じ、空気抜き口は開け放たれた状態で、汚
れた洗浄液は、排水口６を開け外部に排出される。排出
後、原液供給口を開け、原液が容器に充満すれば空気抜
き口を閉じ、容器に原液供給圧力がかかりろ過水取り出
し口７からろ過水が供給される。通常、膜面の汚れが大
きい場合ほど空気スクラビング時間を長く取る必要があ
り、洗浄頻度も高くなる。河川水、湖水など汚れの大き
い原液は、ろ過時間３０〜６０分に対して、洗浄時間５
分〜１０分も必要であった。First, the procedure of the conventional example will be described. FIG. 1 shows a general module structure. In the hollow fiber membrane 8 filled in the container 1, the undiluted solution supply port 3 is closed to wash the dirt on the membrane surface by filtration, and the cleaning air supply port 4 and the air vent port 5 are used. The air is scrubbed and the deposits on the film surface are shaken off. After completion of the air scrubbing, the cleaning air supply port is closed, the air vent port is left open, and the dirty cleaning liquid is discharged to the outside by opening the drain port 6. After discharging, the stock solution supply port is opened, and when the stock solution is filled in the container, the air vent port is closed, the stock solution supply pressure is applied to the container, and the filtered water is supplied from the filtered water outlet 7. Generally, the larger the dirt on the membrane surface, the longer the air scrubbing time needs to be, and the higher the frequency of cleaning. Contaminated stock solutions such as river water and lake water require a cleaning time of 5 to 60 minutes for a filtration time of 30 to 60 minutes.
Minutes to 10 minutes were needed.
【００１６】これに対して、本発明では、次のように操
作を改良した。すなわち、上記の従来例の洗浄用空気を
空気供給口４より供給しながら排水口６を開け排水を行
なう操作おいて、本願では、空気抜き口５を閉じた状態
にする。これにより、容器１内の汚れた洗浄液が洗浄用
空気に押され加圧状態で排出されるため洗浄用空気加圧
がない場合に比べて早くなり、空気を供給しない通常の
排水操作に比べて著しく洗浄時間が短くなる。On the other hand, in the present invention, the operation is improved as follows. That is, in the operation of performing drainage by opening the drain port 6 while supplying the cleaning air of the above conventional example from the air supply port 4, the air vent port 5 is closed in the present application. As a result, the dirty cleaning liquid in the container 1 is pushed by the cleaning air and is discharged in a pressurized state, which is faster than in the case where the cleaning air is not pressurized, and compared to the normal drainage operation in which air is not supplied. The cleaning time is significantly shortened.
【００１７】表１は、以上の本発明の方法を用いた洗浄
操作手順と従来の操作手順を比較したものである。Table 1 is a comparison of the washing operation procedure using the method of the present invention and the conventional operation procedure.
【００１８】[0018]
【表１】 なお、図面としては、図１のように、原液供給口、空気
供給口、排水口、空気抜き口、ろ過水取り出し口がそれ
ぞれ独立に容器へ直結された中空糸膜モジュールの例を
図示したが、本発明の方法はかかる構造に限定されるも
のではなく、例えば、原液供給口、空気供給口、排水
口、が途中でに１つにまとまり、１本のパイプとなって
容器へ接続している形態のモジュールであっても、本発
明の方法を行うのに何ら障害ではない。[Table 1] Note that, as the drawing, as shown in FIG. 1, an example of the hollow fiber membrane module in which the undiluted solution supply port, the air supply port, the drain port, the air vent port, and the filtered water outlet port are independently directly connected to the container is shown. The method of the present invention is not limited to such a structure, and for example, the undiluted solution supply port, the air supply port, and the drainage port are integrated into one on the way and connected to the container as one pipe. Even a form of module is not an obstacle to carrying out the method of the invention.
【００１９】空気加圧時の容器内圧力（大気圧との圧力
差）は中空糸膜を損傷しない程度であることが必要であ
り、通常は０．０５ kgf /cm2 〜５ kgf /cm2 が好まし
く、経済性、容器耐圧を考察すると、０．１ kgf /cm2
〜２．０ kgf /cm2 程度が特に好ましい。The pressure in the container (pressure difference from the atmospheric pressure) at the time of pressurizing air must be such that the hollow fiber membrane is not damaged, and usually 0.05 kgf / cm 2 to 5 kgf / cm 2 Is preferable, and considering economic efficiency and container pressure resistance, 0.1 kgf / cm 2
It is particularly preferably about 2.0 kgf / cm 2 .
【００２０】モジュール本数が１本の場合もさることな
がら、大型モジュールやモジュールを何本も充填した容
器内の汚れた洗浄液を排水する場合の効果は大きい。Not only when the number of modules is one, but also when the dirty cleaning liquid in the large-sized module or the container filled with many modules is drained, the effect is great.
【００２１】このように、本願方法の洗浄操作により、
洗浄時間を大幅に短縮することが可能となる方法を見出
だした。As described above, by the washing operation of the method of the present invention,
We have found a method that can significantly reduce the cleaning time.
【００２２】モジュール構造は、中空糸膜モジュールで
空気スクラビングによる物理洗浄が可能な形態であれば
特に限定するものではない。しかしながら、好ましくは
中空糸膜束と容器が接着剤で一体に固定されており、中
心パイプから周方向外部に向けて均一に空気が供給され
る構造のものが好ましい。The module structure is not particularly limited as long as the hollow fiber membrane module can be physically cleaned by air scrubbing. However, preferably, the hollow fiber membrane bundle and the container are integrally fixed with an adhesive, and a structure in which air is uniformly supplied from the central pipe to the outside in the circumferential direction is preferable.
【００２３】洗浄用空気量は、モジュールの大きさや膜
面の汚れ具合により異なるが、外径１００ｍｍ、長さ１
１００ｍｍ、膜面積１２ｍ２ のモジュールでは、１０
Ｎリットル／分〜５０Ｎリットル／分程度が好ましく、
さらに好ましくは２０Ｎリットル／分〜４０Ｎリットル
／分が良い。（ここでＮリットルとは標準状態［１ａｔ
ｍ，０℃］の時の体積を意味する。） 洗浄時間は、原液の水質・汚れ程度、ろ過時間により異
なるが通常１〜２０分程度で良く、ろ過時間を短くすれ
ば洗浄時間も短くできる。しかしながら、ろ過時間を短
くし、洗浄回数を多くすると原液の回収率が低下するた
め好ましくない。一般的には、濁度０．１〜１度程度の
原水で１２〜２４時間ろ過し、洗浄時間５〜２０分程度
行ない、濁度１〜１０度程度の原水では、０．５〜１時
間ろ過し、洗浄時間１〜５分程度である。The amount of cleaning air varies depending on the size of the module and the degree of dirt on the membrane surface, but the outer diameter is 100 mm and the length is 1
With a module of 100 mm and a membrane area of 12 m 2 , 10
N liter / min to 50 N liter / min is preferable,
More preferably, 20 N liter / min to 40 N liter / min is good. (Here, N liter is the standard condition [1 at
m, 0 ° C.]. The washing time varies depending on the water quality / dirt level of the undiluted solution and the filtration time, but is usually about 1 to 20 minutes. If the filtration time is shortened, the washing time can be shortened. However, shortening the filtration time and increasing the number of washings are not preferable because the recovery rate of the stock solution decreases. Generally, the raw water having a turbidity of about 0.1 to 1 degree is filtered for 12 to 24 hours, and the washing time is about 5 to 20 minutes, and the raw water having a turbidity of about 1 to 10 degree is used for 0.5 to 1 hour. Filtration and washing time is about 1 to 5 minutes.
【００２４】洗浄時の空気スクラビング時間はろ過時間
により異なるが通常１〜２０分程度が一般的である。The air scrubbing time during washing varies depending on the filtration time, but is generally about 1 to 20 minutes.
【００２５】モジュール容器の材質は、特に指定はない
が、接着剤との接着性を考慮して、一般的にはポリ塩化
ビニル樹脂、ポリカーボネート樹脂、ＡＢＳ樹脂、ポリ
スルホン樹脂など高分子樹脂が好ましく用いられるが金
属性、特にステンレスでもかまわない。The material of the module container is not particularly specified, but in consideration of adhesiveness with an adhesive, generally, a polymer resin such as polyvinyl chloride resin, polycarbonate resin, ABS resin, polysulfone resin is preferably used. However, it may be metallic, especially stainless steel.
【００２６】また、本発明に使用する中空糸膜を接着す
るために用いる接着剤としては、ウレタン系接着剤、エ
ポキシ系接着剤、シリコン系接着剤等幅広く使用するこ
とができる。Further, as the adhesive used for adhering the hollow fiber membrane used in the present invention, urethane type adhesives, epoxy type adhesives, silicone type adhesives and the like can be widely used.
【００２７】[0027]
実施例１ 外径４５０μｍ、内径３５０μｍのポリアクリロニトリ
ルの中空糸膜１００００本を４束に分割した中空糸膜束
を外径１０４ｍｍ、内径１００ｍｍの透明外筒の中に充
填し両端を接着剤で２回に別けてシールした後、外筒の
片方を切断機により２回目のシール部分をカットし中空
糸膜束を開孔させた。この中空糸膜モジュールを用い、
琵琶湖水を原液供給口を開け１０リットル／分で供給し
空気が抜けた後空気抜き口を閉じ、１０リットル／分の
ろ過水を得た。１時間通水し膜面が汚れたので、原液供
給口を閉じ、空気抜き口、空気供給口を開け３０リット
ル／分の空気を吹き込み３分間スクラビングさせた後、
引き続き空気供給を行いながら空気抜き口を閉じ、排水
口を開け汚れた洗浄液を排水したところ５秒であった。
洗浄後、再び湖水を原液供給口から通水し容器に充満し
たので空気抜き口を閉じ、通水したところ、正常にろ過
できた。Example 1 A hollow fiber membrane bundle obtained by dividing 10,000 hollow fiber membranes of polyacrylonitrile having an outer diameter of 450 μm and an inner diameter of 350 μm into four bundles was filled in a transparent outer cylinder having an outer diameter of 104 mm and an inner diameter of 100 mm, and both ends were bonded with an adhesive. After sealing in separate times, one of the outer cylinders was cut with a cutter at the second sealing portion to open the hollow fiber membrane bundle. Using this hollow fiber membrane module,
Lake Biwa water was supplied at 10 l / min by opening the undiluted solution supply port, and after the air was released, the air vent port was closed to obtain 10 l / min of filtered water. After passing water for 1 hour and the membrane surface was dirty, close the undiluted solution supply port, open the air vent port and the air supply port, blow 30 liters / min of air and scrub for 3 minutes.
It continued for 5 seconds when the air vent was closed while the air was being supplied, the drain was opened, and the dirty cleaning liquid was drained.
After washing, lake water was again passed through the undiluted solution supply port to fill the container, so the air vent port was closed and water was passed, and normal filtration was possible.
【００２８】比較例１ 実施例１に用いた中空糸膜モジュールを同様に１時間琵
琶湖水をろ過し、同様に３分間空気スクラビングしたの
ち、空気供給口を閉じ空気抜き口は開けた状態で排水し
たところ１分で排水が終了した。排水終了後空気抜き口
を開け、再び湖水を原液供給口から通水し容器に充満し
たので空気抜き口を閉じ、通水したところ、正常にろ過
できた。Comparative Example 1 The hollow fiber membrane module used in Example 1 was similarly filtered for 1 hour with Lake Biwa water, air scrubbed for 3 minutes in the same manner, and then drained with the air supply port closed and the air vent port open. The drainage was completed in 1 minute. After the drainage was completed, the air vent was opened, and the lake water was again passed through the stock solution supply port to fill the container. Therefore, when the air vent was closed and water was passed, normal filtration was possible.
【００２９】[0029]
【発明の効果】本発明により、微粒子や懸濁物質を含ん
だ液体をろ過し、定期的に行なう空気スクラビングによ
る洗浄時間を短縮することが可能な中空糸膜モジュール
の洗浄方法が提供される。また、排水時の水流速度が大
きいので、沈殿物などの除去効率にも優れている。According to the present invention, there is provided a method for cleaning a hollow fiber membrane module, which is capable of shortening the cleaning time by air scrubbing, which is performed by filtering a liquid containing fine particles and suspended substances. Further, since the water flow rate at the time of drainage is high, it is also excellent in the removal efficiency of precipitates and the like.
【図１】 本発明で用いる中空糸膜モジュールの一例で
ある。FIG. 1 is an example of a hollow fiber membrane module used in the present invention.
１：容器 ２：キャップ ３：原液供給口 ４：空気供給口 ５：空気抜き口 ６：排水口 ７：ろ過水取り出し口 ８：中空糸膜 ９：空気出口穴 １０：盲栓 1: Container 2: Cap 3: Undiluted solution supply port 4: Air supply port 5: Air vent port 6: Drain port 7: Filtered water outlet port 8: Hollow fiber membrane 9: Air outlet hole 10: Blind plug
Claims (5)
加圧した状態で排水を行うことを特徴とする中空糸膜モ
ジュールの洗浄方法。1. A method for cleaning a hollow fiber membrane module, which comprises performing air scrubbing and then draining water while the pressure in the container is being increased.
０．０５ kgf /cm2〜５ kgf /cm2 に加圧した状態で排
水を行うことを特徴とする中空糸膜モジュールの洗浄方
法。2. A method for cleaning a hollow fiber membrane module, which comprises performing air scrubbing and then draining water while the pressure in the container is increased to 0.05 kgf / cm 2 to 5 kgf / cm 2 .
抜き口、ろ過水取り出し口を有した中空糸膜モジュール
を使用して、空気抜き口、排水口、空気抜き口を閉じて
原液のろ過運転を行った後で、空気スクラビング工程と
排水工程からなる空気洗浄操作により中空糸膜のろ過性
能回復を行う中空糸膜モジュールの洗浄方法において、
排水口を閉じ、空気供給口と空気抜き口を開いて空気ス
クラビングを行った後、排水口を開き、空気抜き口を閉
じ、かつ空気供給口を開いて容器内を供給空気により加
圧した状態で排水を行うことを特徴とする中空糸膜モジ
ュールの洗浄方法。3. A hollow fiber membrane module having a stock solution supply port, an air supply port, a drain port, an air vent port, and a filtered water outlet port is used to close the air vent port, the drain port, and the air vent port to perform a filtration operation of the stock solution. In the method for cleaning a hollow fiber membrane module, which recovers the filtration performance of the hollow fiber membrane by an air cleaning operation consisting of an air scrubbing step and a draining step after performing
Close the drain port, open the air supply port and the air vent port, and perform air scrubbing, then open the drain port, close the air vent port, and open the air supply port to drain the container with the supply air pressurized. A method for cleaning a hollow fiber membrane module, which comprises:
が接着剤で一体に固定されていることを特徴とする請求
項１記載の中空糸膜モジュールの洗浄方法。4. The method for cleaning a hollow fiber membrane module according to claim 1, wherein the hollow fiber membrane bundle of the hollow fiber membrane module and the container are integrally fixed with an adhesive.
が、アクリロニトリルを少なくとも１成分とする重合体
からなることを特徴とする請求項１記載の中空糸膜モジ
ュールの洗浄方法。5. The method for cleaning a hollow fiber membrane module according to claim 1, wherein the hollow fiber membrane constituting the hollow fiber membrane module is made of a polymer containing at least one component of acrylonitrile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8658594A JPH07289860A (en) | 1994-04-25 | 1994-04-25 | Cleaning method of hollow fiber membrane module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8658594A JPH07289860A (en) | 1994-04-25 | 1994-04-25 | Cleaning method of hollow fiber membrane module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07289860A true JPH07289860A (en) | 1995-11-07 |
Family
ID=13891095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8658594A Pending JPH07289860A (en) | 1994-04-25 | 1994-04-25 | Cleaning method of hollow fiber membrane module |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07289860A (en) |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0952885A4 (en) * | 1996-12-20 | 2001-04-04 | Usf Filtration & Separations | Scouring method |
| JP2002143650A (en) * | 2000-11-13 | 2002-05-21 | Toray Ind Inc | Hollow fiber membrane module |
| WO2002076572A1 (en) * | 2001-03-15 | 2002-10-03 | Nanoentech Co., Ltd. | Apparatus for filtering suspended solid in water |
| US7022231B2 (en) | 1995-08-11 | 2006-04-04 | Zenon Environmental Inc. | Apparatus incorporating potted hollow fiber membranes |
| US7063788B2 (en) | 1995-08-11 | 2006-06-20 | Zenon Environmental Inc. | Apparatus for withdrawing permeate using an immersed vertical skein of hollow fibre membranes |
| USRE39294E1 (en) | 1995-08-11 | 2006-09-19 | Zenon Environmental Inc. | Vertical skein of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate |
| JP2009045623A (en) * | 2001-08-09 | 2009-03-05 | Siemens Water Technologies Corp | Membrane module cleaning method |
| US8840783B2 (en) | 2007-05-29 | 2014-09-23 | Evoqua Water Technologies Llc | Water treatment membrane cleaning with pulsed airlift pump |
| US8852438B2 (en) | 1995-08-11 | 2014-10-07 | Zenon Technology Partnership | Membrane filtration module with adjustable header spacing |
| US8858796B2 (en) | 2005-08-22 | 2014-10-14 | Evoqua Water Technologies Llc | Assembly for water filtration using a tube manifold to minimise backwash |
| US8956464B2 (en) | 2009-06-11 | 2015-02-17 | Evoqua Water Technologies Llc | Method of cleaning membranes |
| US9023206B2 (en) | 2008-07-24 | 2015-05-05 | Evoqua Water Technologies Llc | Frame system for membrane filtration modules |
| US9022224B2 (en) | 2010-09-24 | 2015-05-05 | Evoqua Water Technologies Llc | Fluid control manifold for membrane filtration system |
| CN106232212A (en) * | 2014-04-25 | 2016-12-14 | 东丽株式会社 | For operating the method purifying thin-film module |
| US9533261B2 (en) | 2012-06-28 | 2017-01-03 | Evoqua Water Technologies Llc | Potting method |
| US9604166B2 (en) | 2011-09-30 | 2017-03-28 | Evoqua Water Technologies Llc | Manifold arrangement |
| US9675938B2 (en) | 2005-04-29 | 2017-06-13 | Evoqua Water Technologies Llc | Chemical clean for membrane filter |
| US9764289B2 (en) | 2012-09-26 | 2017-09-19 | Evoqua Water Technologies Llc | Membrane securement device |
| US9764288B2 (en) | 2007-04-04 | 2017-09-19 | Evoqua Water Technologies Llc | Membrane module protection |
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| US9914097B2 (en) | 2010-04-30 | 2018-03-13 | Evoqua Water Technologies Llc | Fluid flow distribution device |
| US9925499B2 (en) | 2011-09-30 | 2018-03-27 | Evoqua Water Technologies Llc | Isolation valve with seal for end cap of a filtration system |
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| US10427102B2 (en) | 2013-10-02 | 2019-10-01 | Evoqua Water Technologies Llc | Method and device for repairing a membrane filtration module |
-
1994
- 1994-04-25 JP JP8658594A patent/JPH07289860A/en active Pending
Cited By (38)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7022231B2 (en) | 1995-08-11 | 2006-04-04 | Zenon Environmental Inc. | Apparatus incorporating potted hollow fiber membranes |
| US8852438B2 (en) | 1995-08-11 | 2014-10-07 | Zenon Technology Partnership | Membrane filtration module with adjustable header spacing |
| 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 |
| USRE39294E1 (en) | 1995-08-11 | 2006-09-19 | Zenon Environmental Inc. | Vertical skein of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate |
| US7063788B2 (en) | 1995-08-11 | 2006-06-20 | Zenon Environmental Inc. | Apparatus for withdrawing permeate using an immersed vertical skein of hollow fibre membranes |
| US6555005B1 (en) | 1996-12-20 | 2003-04-29 | Usf Filtration & Separations Group Inc. | Scouring method |
| EP0952885A4 (en) * | 1996-12-20 | 2001-04-04 | Usf Filtration & Separations | Scouring method |
| EP1736234A3 (en) * | 1996-12-20 | 2007-06-13 | Siemens Water Technologies Corp. | Method for scouring fouled membranes |
| JP2002143650A (en) * | 2000-11-13 | 2002-05-21 | Toray Ind Inc | Hollow fiber membrane module |
| KR100354836B1 (en) * | 2001-03-15 | 2002-10-05 | 주식회사 나노엔텍 | Apparatus for filtering suspended solid in water |
| WO2002076572A1 (en) * | 2001-03-15 | 2002-10-03 | Nanoentech Co., Ltd. | Apparatus for filtering suspended solid in water |
| JP2009045623A (en) * | 2001-08-09 | 2009-03-05 | Siemens Water Technologies Corp | Membrane module cleaning method |
| US9675938B2 (en) | 2005-04-29 | 2017-06-13 | Evoqua Water Technologies Llc | Chemical clean for membrane filter |
| US8858796B2 (en) | 2005-08-22 | 2014-10-14 | Evoqua Water Technologies Llc | Assembly for water filtration using a tube manifold to minimise backwash |
| US8894858B1 (en) | 2005-08-22 | 2014-11-25 | Evoqua Water Technologies Llc | Method and assembly for water filtration using a tube manifold to minimize backwash |
| US9764288B2 (en) | 2007-04-04 | 2017-09-19 | Evoqua Water Technologies Llc | Membrane module protection |
| US9206057B2 (en) | 2007-05-29 | 2015-12-08 | Evoqua Water Technologies Llc | Membrane cleaning with pulsed airlift pump |
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| US10507431B2 (en) | 2007-05-29 | 2019-12-17 | Evoqua Water Technologies Llc | Membrane cleaning with pulsed airlift pump |
| US9573824B2 (en) | 2007-05-29 | 2017-02-21 | Evoqua Water Technologies Llc | Membrane cleaning with pulsed airlift pump |
| US9023206B2 (en) | 2008-07-24 | 2015-05-05 | Evoqua Water Technologies Llc | Frame system for membrane filtration modules |
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| US9914097B2 (en) | 2010-04-30 | 2018-03-13 | Evoqua Water Technologies Llc | Fluid flow distribution device |
| US9022224B2 (en) | 2010-09-24 | 2015-05-05 | Evoqua Water Technologies Llc | Fluid control manifold for membrane filtration system |
| US9630147B2 (en) | 2010-09-24 | 2017-04-25 | Evoqua Water Technologies Llc | Fluid control manifold for membrane filtration system |
| US10391432B2 (en) | 2011-09-30 | 2019-08-27 | 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 |
| US9604166B2 (en) | 2011-09-30 | 2017-03-28 | Evoqua Water Technologies Llc | Manifold arrangement |
| US11065569B2 (en) | 2011-09-30 | 2021-07-20 | Rohm And Haas Electronic Materials Singapore Pte. Ltd. | Manifold arrangement |
| US9533261B2 (en) | 2012-06-28 | 2017-01-03 | Evoqua Water Technologies Llc | Potting method |
| US9764289B2 (en) | 2012-09-26 | 2017-09-19 | Evoqua Water Technologies Llc | Membrane securement device |
| US9962865B2 (en) | 2012-09-26 | 2018-05-08 | Evoqua Water Technologies Llc | Membrane potting methods |
| US9815027B2 (en) | 2012-09-27 | 2017-11-14 | Evoqua Water Technologies Llc | Gas scouring apparatus for immersed membranes |
| US10427102B2 (en) | 2013-10-02 | 2019-10-01 | Evoqua Water Technologies Llc | Method and device for repairing a membrane filtration module |
| US11173453B2 (en) | 2013-10-02 | 2021-11-16 | Rohm And Haas Electronic Materials Singapores | Method and device for repairing a membrane filtration module |
| CN106232212A (en) * | 2014-04-25 | 2016-12-14 | 东丽株式会社 | For operating the method purifying thin-film module |
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