JPH10235168A - Filter cleaning method - Google Patents
Filter cleaning methodInfo
- Publication number
- JPH10235168A JPH10235168A JP3951797A JP3951797A JPH10235168A JP H10235168 A JPH10235168 A JP H10235168A JP 3951797 A JP3951797 A JP 3951797A JP 3951797 A JP3951797 A JP 3951797A JP H10235168 A JPH10235168 A JP H10235168A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- filtrate
- hollow fiber
- fiber membrane
- outer container
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、浄水器などに用い
られるろ過材を有するフィルターを洗浄する方法に関
し、特に、電源のない場所においても実施することがで
き、かつ洗浄効果の高いフィルターの洗浄方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cleaning a filter having a filtering material used in a water purifier or the like, and more particularly to a method for cleaning a filter which can be carried out even in a place without a power source and has a high cleaning effect. About the method.
【０００２】[0002]
【従来の技術】従来、浄水器などに用いられるフィルタ
ーとしては、中空糸タイプなどの膜をろ過材として用
い、このろ過材を合成樹脂製の外容器内に納めたものが
多用されている。図２は、この種のフィルターを示すも
ので、ここに示すフィルター２１は、筒状の外容器２２
内部に、中空糸膜２３が収容されたものである。中空糸
膜２３は、セルロース系材料などからなるもので、その
一端には、中空糸膜２３の一端の開口を封止する封止部
２５が設けられ、他端には、中空糸膜２３の他端を開口
状態に保ったまま外容器２２に固定する固定部材２６が
設けられている。2. Description of the Related Art Conventionally, as a filter used in a water purifier or the like, a filter in which a hollow fiber type membrane or the like is used as a filter material and the filter material is contained in an outer container made of a synthetic resin is often used. FIG. 2 shows this type of filter. The filter 21 shown here is a cylindrical outer container 22.
The hollow fiber membrane 23 is housed inside. The hollow fiber membrane 23 is made of a cellulosic material or the like. At one end, a sealing portion 25 for sealing the opening at one end of the hollow fiber membrane 23 is provided. A fixing member 26 is provided for fixing the other end to the outer container 22 while keeping the other end open.
【０００３】外容器２２は、合成樹脂などからなる筒状
体で、その側面には、ろ過するべき原液を外容器２２内
部に導入するための原液導入口２７が設けられている。
外容器２２上部には、中空糸膜２３によってろ過された
ろ液が導入されるろ液導入室２８が設けられ、導入室２
８には、ろ液を系外に導出するろ液導出口２９が設けら
れている。外容器２２内部の中空糸膜２３の下方位置に
は、空気供給部３０が設けられている。空気供給部３０
は、外容器２２外部に設けられたコンプレッサ３１に接
続されており、コンプレッサ３１を稼働させることによ
って外容器２２内に加圧空気を供給することができるよ
うになっている。また、ろ液導入室２８内には、空気供
給部３２が設けられている。空気供給部３２は、上記コ
ンプレッサ３１に接続されており、コンプレッサ３１を
稼働させることによって中空糸膜２３内部に加圧空気を
供給することができるようになっている。[0003] The outer container 22 is a cylindrical body made of a synthetic resin or the like, and a side surface thereof is provided with a stock solution inlet 27 for introducing a stock solution to be filtered into the inside of the outer container 22.
A filtrate introduction chamber 28 into which the filtrate filtered by the hollow fiber membrane 23 is introduced is provided above the outer container 22.
8 is provided with a filtrate outlet 29 for leading the filtrate out of the system. An air supply unit 30 is provided below the hollow fiber membrane 23 inside the outer container 22. Air supply unit 30
Is connected to a compressor 31 provided outside the outer container 22. By operating the compressor 31, compressed air can be supplied into the outer container 22. An air supply unit 32 is provided in the filtrate introduction chamber 28. The air supply unit 32 is connected to the compressor 31, and can supply pressurized air into the hollow fiber membrane 23 by operating the compressor 31.
【０００４】上記フィルター２１を用いてろ過を行う際
には、原液を、図示せぬポンプによって原液導入口２７
を通して加圧状態で外容器２２内に供給する。中空糸膜
２３を透過し、中空糸膜２３内に至ったろ液は、ろ液導
入室２８内に入り、ろ液導出口２９から系外に導出され
る。When performing filtration using the filter 21, the undiluted solution is supplied to the undiluted solution inlet 27 by a pump (not shown).
Is supplied into the outer container 22 in a pressurized state. The filtrate that has passed through the hollow fiber membrane 23 and has reached the inside of the hollow fiber membrane 23 enters the filtrate introduction chamber 28 and is drawn out of the system from the filtrate outlet 29.
【０００５】ろ過によって原液中の懸濁物質などが中空
糸膜２３上に堆積し、ろ過抵抗が上昇し、流束が低下し
た場合には、次のような方法によって中空糸膜２３を洗
浄し、流束を回復させる。まず、原液の供給を停止した
後、コンプレッサ３１を稼働させ、加圧空気を空気供給
部３２を通して中空糸膜２３内に送り込む。中空糸膜２
３内に送り込まれた加圧空気は、中空糸膜２３を透過し
原液側に出る。この際、上記空気は中空糸膜２３上の堆
積物を剥離する。また同時に、外容器２２内の中空糸膜
２３下方位置に設けられた空気供給部３０から外容器３
内部に空気を供給する。中空糸膜２３下方に供給された
空気は、外容器２２内を上昇する際に、中空糸膜２３を
振動させ、中空糸膜２３上の堆積物を剥離する。以上の
操作によって、中空糸膜２３上の堆積物を剥離し、その
流束を回復させる。[0005] When a suspended substance or the like in the stock solution is deposited on the hollow fiber membrane 23 by filtration and the filtration resistance increases and the flux decreases, the hollow fiber membrane 23 is washed by the following method. , Restore flux. First, after the supply of the stock solution is stopped, the compressor 31 is operated, and pressurized air is sent into the hollow fiber membrane 23 through the air supply unit 32. Hollow fiber membrane 2
The pressurized air sent into 3 passes through the hollow fiber membrane 23 and exits to the stock solution side. At this time, the air separates the deposit on the hollow fiber membrane 23. At the same time, the outer container 3 is provided from an air supply unit 30 provided below the hollow fiber membrane 23 in the outer container 22.
Supply air inside. The air supplied below the hollow fiber membrane 23 vibrates the hollow fiber membrane 23 when ascending inside the outer container 22 to separate the deposit on the hollow fiber membrane 23. By the above operation, the deposit on the hollow fiber membrane 23 is peeled off, and the flux is recovered.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら上記従来
のフィルターの洗浄方法には、次に示すような問題があ
った。上記洗浄方法にあっては、中空糸膜２３の内部お
よび外部に空気を供給するコンプレッサ３１が必要とな
る。このため、室外や僻地などの、電力供給が不可能な
場所での実施が困難であり、その洗浄効果も不十分であ
った。本発明は、上記事情に鑑みてなされたもので、電
源のない場所においても実施することができ、かつ洗浄
効果の高いフィルターの洗浄方法を提供することを目的
とする。However, the above-mentioned conventional method for cleaning a filter has the following problems. In the above cleaning method, a compressor 31 for supplying air to the inside and outside of the hollow fiber membrane 23 is required. For this reason, it is difficult to carry out the method in a place where power supply is impossible, such as an outdoor place or a remote place, and the cleaning effect is insufficient. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for cleaning a filter which can be implemented even in a place without a power source and has a high cleaning effect.
【０００７】[0007]
【課題を解決するための手段】上記課題は、原液と空気
とを混合した気液混合流体を外容器に加圧して供給し、
フィルターのろ過材を振動させるバブリング工程を有す
るフィルターの洗浄方法によって解決される。また、こ
のバブリング工程に先立ち、ろ過材を通過したろ液を蓄
圧して貯え、この蓄圧されたろ液を短時間にろ過材に逆
流させる逆洗工程を行うのが好ましい。また、ろ過材を
中空糸膜とし、フィルターをこの中空糸膜のろ過材を覆
う窓付きの筒状カバーを有するものとし、気液混合流体
をカバーの下方に位置する窓から優先的に内部のろ過材
に向けて流すようにしてもよい。The object of the present invention is to supply a gas-liquid mixed fluid obtained by mixing an undiluted solution and air to an outer container under pressure,
The problem is solved by a filter cleaning method including a bubbling step of vibrating a filter medium of the filter. Prior to the bubbling step, it is preferable to perform a backwashing step of accumulating and storing the filtrate that has passed through the filter medium, and back-flowing the accumulated filtrate to the filter medium in a short time. The filter medium is a hollow fiber membrane, and the filter has a cylindrical cover with a window covering the filter medium of the hollow fiber membrane. You may make it flow toward a filter material.
【０００８】[0008]
【発明の実施の形態】図１は、本発明のフィルターの洗
浄方法の一例を実施するために用いられるろ過装置を示
すものである。図１において、符号１はフィルターを示
し、符号２は、逆洗用ろ液を貯留し、この逆洗用ろ液を
フィルター１に供給する逆洗用ろ液供給部を示す。フィ
ルター１は、外容器３内部に、ろ過材として中空糸膜４
が収容されたものである。外容器３は合成樹脂などから
なる筒状体で、その側壁下部には、原液供給口３ａが設
けられている。また、外容器３の下端には、中空糸膜４
によってろ過されたろ液を導出するろ液導出口３ｂが設
けられている。また、外容器３の上端には、外容器３内
の原液を排出する原液排出口３ｃが設けられている。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a filtration device used for carrying out an example of a method for cleaning a filter according to the present invention. In FIG. 1, reference numeral 1 denotes a filter, and reference numeral 2 denotes a backwashing filtrate supply unit that stores the backwashing filtrate and supplies the backwashing filtrate to the filter 1. The filter 1 includes a hollow fiber membrane 4 as a filtering material inside an outer container 3.
Is housed. The outer container 3 is a cylindrical body made of a synthetic resin or the like, and a stock solution supply port 3a is provided at a lower portion of a side wall thereof. A hollow fiber membrane 4 is provided at the lower end of the outer container 3.
There is provided a filtrate outlet 3b for discharging the filtrate filtered by the filter. At the upper end of the outer container 3, a stock solution outlet 3c for discharging the stock solution in the outer container 3 is provided.
【０００９】中空糸膜４は、セルロース系、ポリオレフ
ィン系、ポリスルフォン系、ポリビニルアルコール系材
料などからなる中空糸膜が多数本束ねられたものとさ
れ、筒状カバー５によって覆われた状態で外容器３内に
収容されている。筒状カバー５は、合成樹脂などからな
る筒状体で、その側壁には、全面にわたって多数の窓５
ａが形成されており、外側壁下部には、障壁リング５ｂ
が設けられている。障壁リング５ｂは、後述するフィル
ター１の洗浄作業の際に、原液供給口３ａから外容器３
内に供給された流体が筒状カバー５と外容器３との隙間
を通って上方に逃げるのを防ぎ、この流体をリング５よ
り下方に形成された窓５ａを通して優先的に筒状カバー
５内の中空糸膜４に向けて流すためのもので、その外径
は外容器３の内径にほぼ等しいか、または該内径より１
〜２ｍｍ程度小さいものとされる。The hollow fiber membrane 4 is formed by bundling a large number of hollow fiber membranes made of a cellulose-based, polyolefin-based, polysulfone-based, polyvinyl alcohol-based material, or the like. It is contained in the container 3. The cylindrical cover 5 is a cylindrical body made of a synthetic resin or the like, and has a large number of windows 5 on its side wall over the entire surface.
a is formed, and a barrier ring 5b
Is provided. The barrier ring 5b is connected to the outer container 3 through the undiluted solution supply port 3a when the filter 1 described below is washed.
The fluid supplied to the inside is prevented from escaping upward through the gap between the cylindrical cover 5 and the outer container 3, and this fluid is preferentially passed through the window 5 a formed below the ring 5 into the cylindrical cover 5. The outer diameter is almost equal to the inner diameter of the outer container 3 or 1 mm from the inner diameter.
About 2 mm smaller.
【００１０】外容器３の原液供給口３ａには、フィルタ
ー１に原液を供給するための原液ポンプＰ１を有する原
液供給管路６が接続されている。管路６には、エジェク
タ７が設けられ、エジェクタ７とフィルター１の間の管
路６には、原液供給バルブＶ６が設けられている。エジ
ェクタ７には、管路６内に空気を供給するための供給バ
ルブＶ８を有する空気供給管路８が接続されており、こ
の管路８の一端は大気に開放されている。An undiluted solution supply pipe 3 having an undiluted solution pump P1 for supplying undiluted solution to the filter 1 is connected to the undiluted solution supply port 3a of the outer container 3. An ejector 7 is provided in the pipe 6, and a stock solution supply valve V 6 is provided in the pipe 6 between the ejector 7 and the filter 1. An air supply pipe 8 having a supply valve V8 for supplying air into the pipe 6 is connected to the ejector 7, and one end of the pipe 8 is open to the atmosphere.
【００１１】この例の方法で用いられるポンプＰ１とし
ては、例えばエンジンなどの、電源を必要としない駆動
源を用いて駆動させることができるタイプのものが使用
される。As the pump P1 used in the method of this embodiment, a pump that can be driven using a drive source that does not require a power source, such as an engine, is used.
【００１２】外容器３の原液排出口３ｃには、外容器３
内の原液を系外に排出するための排出バルブＶ９を有す
る原液排出管路９が設けられている。外容器３のろ液導
出口３ｂには、ろ液を系外に導出するための導出バルブ
Ｖ１０を有するろ液導出管路１０が接続されている。ろ
液導出管路１０には、フィルター１内に逆洗用ろ液を供
給するための供給バルブＶ１１を有する逆洗用ろ液供給
管路１１の一端が接続され、管路１１の他端は上記ろ液
供給部２に接続されている。The stock solution outlet 3c of the outer container 3 has an outer container 3
A stock solution discharge pipe 9 having a discharge valve V9 for discharging the stock solution inside the system is provided. The filtrate outlet 3b of the outer container 3 is connected to a filtrate outlet pipe 10 having an outlet valve V10 for discharging the filtrate out of the system. One end of a backwash filtrate supply line 11 having a supply valve V11 for supplying the backwash filtrate into the filter 1 is connected to the filtrate discharge line 10, and the other end of the line 11 is connected to the other end of the line 11. It is connected to the filtrate supply unit 2.
【００１３】ろ液供給部２は、２つのシリンダ２ａ、２
ｂと、複動ピストン１２とからなる複動シリンダであ
る。一方のシリンダ２ａは、内部に逆洗用ろ液を貯留
し、貯留したろ液をフィルター１に供給するもので、ろ
液供給口２ｃを有し、この供給口２ｃには、上記管路１
１が接続されている。他方のシリンダ２ｂには、上記原
水供給管路６内の原液をシリンダ２ｂ内に導入するため
の原液導入口２ｄが設けられ、導入口２ｄは、導入バル
ブＶ１３を有する原液導入管路１３を介して上記管路６
に接続されている。またシリンダ２ｂには、シリンダ２
ｂ内の原液を系外に排出するための原液排出口２ｅが設
けられ、排出口２ｅには、排出バルブＶ１４を有する原
液排出管路１４が接続されている。管路１４の一端は大
気に開放されている。The filtrate supply unit 2 includes two cylinders 2a, 2
b and a double-acting piston 12. One of the cylinders 2a stores therein a backwashing filtrate and supplies the stored filtrate to the filter 1. The cylinder 2a has a filtrate supply port 2c.
1 is connected. The other cylinder 2b is provided with an undiluted solution inlet 2d for introducing the undiluted solution in the undiluted water supply line 6 into the cylinder 2b, and the inlet 2d is provided via an undiluted solution introduction line 13 having an introduction valve V13. Above the pipeline 6
It is connected to the. The cylinder 2b has a cylinder 2
A stock solution discharge port 2e for discharging the stock solution in b outside the system is provided, and a stock solution discharge pipe line 14 having a discharge valve V14 is connected to the discharge port 2e. One end of the pipe 14 is open to the atmosphere.
【００１４】複動ピストン１２は、シリンダ２ａ、２ｂ
内にそれぞれ配置されたピストン１２ａ、１２ｂと、こ
れらを連結する連接棒１２ｃとからなるもので、２つの
シリンダ２ａ、２ｂ内の双方に液圧を加えることができ
るようになっている。ろ過水供給部２としては、シリン
ダ２ｂの断面積がシリンダ２ａの断面積よりも大きいも
のを用いると、後述するフィルター洗浄操作の際にシリ
ンダ２ａ内に貯留された逆洗用ろ液をフィルター１に高
圧で供給できるため好ましい。The double-acting piston 12 has cylinders 2a, 2b
Of the two cylinders 2a, 2b, and a connecting rod 12c for connecting the pistons 12a, 12b, respectively, so that hydraulic pressure can be applied to both of the two cylinders 2a, 2b. If the cross-sectional area of the cylinder 2b is larger than the cross-sectional area of the cylinder 2a as the filtered water supply unit 2, the back-washing filtrate stored in the cylinder 2a during the filter cleaning operation described later is filtered by the filter 1. Is preferable because it can be supplied at a high pressure.
【００１５】以下、上記ろ過装置を用いて原液のろ過を
行う方法について説明する。ポンプＰ１を稼働し、原液
を、原液供給管路６を通してフィルター１の外容器３内
に３ｋｇ／ｃｍ2程度の圧力となるように加圧して送り
込む。外容器３内に送り込まれた原液は、窓５ａを通し
て筒状カバー５内に入り、中空糸膜４を透過し、ろ液導
出口３ｂおよびろ液導出管路１０を通って系外に導出さ
れる。上記のようにろ過を行う際には、原水供給管路６
の供給バルブＶ６、およびろ過水導出管路１０の導出バ
ルブＶ１０を開いた状態とするとともに、空気供給管路
８の供給バルブＶ８、逆洗用ろ液供給管路１１の供給バ
ルブＶ１１、原液導入管路１３の導入バルブＶ１３、お
よび原液排出管路１４の排出バルブＶ１４を閉じた状態
とする。また、ろ過の際には、必要に応じて原液排出管
路９の排出バルブＶ９を開放し、濃縮された原液を系外
に排出してよいが、通常の状態では、排出バルブＶ９は
閉止した状態とされる。Hereinafter, a method of filtering a stock solution using the above-mentioned filtration device will be described. The pump P1 is operated to pressurize the undiluted solution into the outer container 3 of the filter 1 through the undiluted solution supply line 6 so as to have a pressure of about 3 kg / cm 2 . The stock solution sent into the outer container 3 enters the cylindrical cover 5 through the window 5a, passes through the hollow fiber membrane 4, and is drawn out of the system through the filtrate outlet 3b and the filtrate outlet pipe 10. You. When performing filtration as described above, the raw water supply line 6
And the supply valve V8 of the air supply line 8, the supply valve V11 of the backwashing filtrate supply line 11, and the undiluted solution introduction. The introduction valve V13 of the pipe 13 and the discharge valve V14 of the stock solution discharge pipe 14 are closed. Further, at the time of filtration, the discharge valve V9 of the undiluted solution discharge line 9 may be opened as necessary to discharge the concentrated undiluted solution to the outside of the system. However, in a normal state, the discharge valve V9 is closed. State.
【００１６】次に、上記ろ過装置を用いた場合を例とし
て、本発明のフィルターの洗浄方法の一例を説明する。
ろ過によって原液中の懸濁物質などがフィルター１の中
空糸膜４上に堆積し、ろ過抵抗が上昇し、流束が低下し
た場合には、次に示す方法によって中空糸膜４を洗浄
し、流束を回復させる。この例の方法は、逆洗工程と、
バブリング工程を有するものとされる。まず、以下に示
す逆洗工程を行う。ろ液導出管路１０の導出バルブＶ１
０を閉じるとともに、ろ液供給管路１１の供給バルブＶ
１１を開き、上記ろ液がろ液供給部２内に流れることが
できる状態とする。同時に、ろ液供給部２のシリンダ２
ｂに接続された原液排出管路１４の排出バルブＶ１４を
開き、シリンダ２ｂ内の圧力を大気圧と等しくする。Next, an example of the method for cleaning a filter according to the present invention will be described, taking the case where the above-mentioned filtration device is used as an example.
When the suspended substances and the like in the undiluted solution are deposited on the hollow fiber membrane 4 of the filter 1 by filtration, and the filtration resistance increases and the flux decreases, the hollow fiber membrane 4 is washed by the following method. Restore flux. The method of this example includes a backwash step,
It has a bubbling step. First, the following backwashing step is performed. Outlet valve V1 of filtrate outlet line 10
0 and the supply valve V of the filtrate supply line 11
11 is opened so that the filtrate can flow into the filtrate supply unit 2. At the same time, the cylinder 2 of the filtrate supply unit 2
The discharge valve V14 of the undiluted liquid discharge line 14 connected to the valve b is opened to make the pressure in the cylinder 2b equal to the atmospheric pressure.
【００１７】上記のように各バルブを開閉することによ
って、フィルター１内でろ過されたろ液は、加圧された
状態でろ液供給管路１１を通って一方のシリンダ２ａ内
に導入される。このとき、他方のシリンダ２ｂ内圧は大
気圧に等しくされているため、複動ピストン１２はシリ
ンダ２ｂ側に移動し、上記ろ液は蓄圧された状態でシリ
ンダ２ａ内に貯留される。By opening and closing the respective valves as described above, the filtrate filtered in the filter 1 is introduced into one cylinder 2a through the filtrate supply pipe 11 in a pressurized state. At this time, since the internal pressure of the other cylinder 2b is equal to the atmospheric pressure, the double-acting piston 12 moves to the cylinder 2b side, and the filtrate is stored in the cylinder 2a in a state where the pressure is accumulated.
【００１８】続いて、原液排出管路１４の排出バルブＶ
１４を閉じるとともに、原液導入管路１３の導入バルブ
Ｖ１３を開き、原液供給管路６内の原液がろ液供給部２
のシリンダ２ｂ内に流れることができる状態とする。次
いで、フィルター１上部に設けられた原液排出管路９の
排出バルブＶ９を開く。この際、外容器３内の原液の一
部は管路９を通って系外に排出され、外容器３内の原液
側の圧力は低下する。シリンダ２ａ内のろ液は蓄圧され
た状態であるため、逆洗用ろ液供給管路１１を通ってフ
ィルター１の中空糸膜４内に流れ込み、短時間のうちに
中空糸膜４を逆流し、中空糸膜４上の堆積物を剥離させ
つつ中空糸膜４外部に流出する。剥離した堆積物を含む
流出液は、管路９を通って系外に排出される。Subsequently, the discharge valve V of the stock solution discharge line 14
14 and the introduction valve V13 of the undiluted solution introduction line 13 is opened, and the undiluted solution in the undiluted solution supply line 6 is removed from the filtrate supply unit
To be able to flow into the cylinder 2b. Next, the discharge valve V9 of the undiluted liquid discharge line 9 provided on the upper part of the filter 1 is opened. At this time, a part of the undiluted solution in the outer container 3 is discharged out of the system through the pipe 9, and the pressure of the undiluted solution in the outer container 3 decreases. Since the filtrate in the cylinder 2a is in a pressure-accumulated state, it flows into the hollow fiber membrane 4 of the filter 1 through the backwashing filtrate supply pipe 11, and flows back through the hollow fiber membrane 4 in a short time. Then, the sediment on the hollow fiber membrane 4 flows out of the hollow fiber membrane 4 while being peeled off. The effluent containing the separated sediment is discharged out of the system through the pipe 9.
【００１９】続いて、以下に示すバブリング工程を行
う。まず、空気供給管路８の供給バルブＶ８を開く。管
路８はエジェクタ７に接続されているため、管路８内
は、管路６内の原液の流れによって減圧状態となり、大
気に開放された管路８の一端側から空気が吸引され、吸
引された空気はエジェクタ７を通って管路６内に流入
し、管路６内で原液と混合し気液混合流体となる。この
気液混合流体は、外容器３の下部に設けられた原液供給
口３ａから外容器３内に入り、筒状カバー５の内部また
は外部を上方に向かって流れ、原液排出口３ｃ、原液排
出管路９を通って系外に排出される。Subsequently, the following bubbling step is performed. First, the supply valve V8 of the air supply line 8 is opened. Since the pipe 8 is connected to the ejector 7, the pressure in the pipe 8 is reduced by the flow of the undiluted solution in the pipe 6, and air is sucked from one end of the pipe 8 opened to the atmosphere. The produced air flows into the pipe 6 through the ejector 7 and mixes with the undiluted liquid in the pipe 6 to become a gas-liquid mixed fluid. The gas-liquid mixed fluid enters the outer container 3 from a stock solution supply port 3a provided at a lower portion of the outer container 3, flows upward or downward inside the cylindrical cover 5, and flows into the stock solution discharge port 3c. It is discharged out of the system through the pipe 9.
【００２０】気液混合流体が外容器３内を流れるとき、
この気液混合流体の一部は、窓５ａを通って筒状カバー
５内に入り、中空糸膜４上を上方に向かって流れ、筒状
カバー５内上部に達し、最上部の窓５ａからカバー５外
に出る。気液混合流体が筒状カバー５内を上昇する過程
で、この流体に含まれる空気は、流体の流れを乱れさ
せ、中空糸膜４を振動させる。中空糸膜４が振動するこ
とによって、中空糸膜４上の堆積物の剥離は促進され
る。同時に、気液混合流体の原液の筒状カバー５内の流
れによって中空糸膜４上の堆積物に強い剪断力が加えら
れ、堆積物の剥離がさらに促進される。When the gas-liquid mixed fluid flows in the outer container 3,
A part of this gas-liquid mixed fluid enters the cylindrical cover 5 through the window 5a, flows upward on the hollow fiber membrane 4, reaches the upper part of the cylindrical cover 5, and reaches from the uppermost window 5a. Go out of the cover 5. In the process in which the gas-liquid mixed fluid rises in the cylindrical cover 5, the air contained in the fluid disturbs the flow of the fluid and causes the hollow fiber membrane 4 to vibrate. When the hollow fiber membrane 4 vibrates, the separation of the deposit on the hollow fiber membrane 4 is promoted. At the same time, a strong shearing force is applied to the deposit on the hollow fiber membrane 4 due to the flow of the undiluted liquid of the gas-liquid mixed fluid in the cylindrical cover 5, and the detachment of the deposit is further promoted.
【００２１】また、原液供給口３ａから外容器３内に入
った気液混合流体の一部は、外容器３と筒状カバー５と
の隙間に入るが、筒状カバー５の外側壁には、障壁リン
グ５ｂが設けられているため、外容器３と筒状カバー５
の隙間における上方への流れが阻害され、この隙間に流
れた気液混合流体の大部分は、障壁リング５ｂより下方
に設けられた窓５ａを通って筒状カバー５内に流れ込
み、筒状カバー５内を上方に向かって流れるようにな
る。A part of the gas-liquid mixed fluid that has entered the outer container 3 from the undiluted solution supply port 3a enters the gap between the outer container 3 and the cylindrical cover 5, but the outer wall of the cylindrical cover 5 , The outer ring 3 and the cylindrical cover 5 are provided.
Of the gas-liquid mixed fluid that has flowed into this gap flows into the cylindrical cover 5 through the window 5a provided below the barrier ring 5b. 5 flows upward.
【００２２】上記のような洗浄方法にあっては、ポンプ
Ｐ１を駆動させることによって、原水供給管路６内の原
液に、管路８およびエジェクタ７を介して空気を供給
し、これら原液および空気を気液混合流体とし、これを
管路６を通してフィルター１の外容器３内に加圧して供
給するバブリング工程を有するので、気液混合流体中の
空気によってフィルター１の中空糸膜４を振動させると
ともに、該流体中の原液の流れによって中空糸膜４上の
堆積物に強い剪断力を加え、中空糸膜４上の堆積物を効
率よく剥離し、高い洗浄効果を得ることができる。In the above-described cleaning method, air is supplied to the raw liquid in the raw water supply pipe 6 through the pipe 8 and the ejector 7 by driving the pump P1. Is a gas-liquid mixed fluid, and a bubbling step of supplying the pressurized gas into the outer container 3 of the filter 1 through the conduit 6 is provided, so that the hollow fiber membrane 4 of the filter 1 is vibrated by the air in the gas-liquid mixed fluid. At the same time, a strong shearing force is applied to the deposit on the hollow fiber membrane 4 by the flow of the stock solution in the fluid, and the deposit on the hollow fiber membrane 4 can be efficiently peeled off, and a high cleaning effect can be obtained.
【００２３】また、コンプレッサを用いることなく、例
えばエンジンなどの、電源を必要としない駆動源を用い
て駆動させることができるポンプＰ１のみを用いて気液
混合流体を中空糸膜４に供給し、これを洗浄することが
できる。よって、室外や僻地などの電源のない場所での
実施や、停電時などの電力供給が困難な場合における実
施が可能となる。Further, without using a compressor, a gas-liquid mixed fluid is supplied to the hollow fiber membrane 4 using only a pump P1 that can be driven by a drive source that does not require a power source, such as an engine, This can be washed. Therefore, the present invention can be implemented in a place without a power source such as an outdoor place or a remote place, or in a case where power supply is difficult such as a power outage.
【００２４】また、上記バブリング工程に先立ち、中空
糸膜４を通過したろ液をろ液供給部２内に蓄圧して貯
え、この蓄圧されたろ液を短時間に中空糸膜４に逆流さ
せる逆洗工程を行うことによって、中空糸膜４上の堆積
物の剥離を促進し、洗浄効果をより高めることができ
る。Prior to the bubbling step, the filtrate that has passed through the hollow fiber membrane 4 is accumulated and stored in the filtrate supply unit 2, and the accumulated filtrate is returned to the hollow fiber membrane 4 in a short time. By performing the washing step, the separation of the deposit on the hollow fiber membrane 4 is promoted, and the washing effect can be further enhanced.
【００２５】また、フィルター１として、中空糸膜４を
覆う窓５ａを有する筒状カバー５を有するものを用い、
筒状カバー５として、その外側壁に、障壁リング５ｂを
設けたものを用い、気液混合流体を外容器３の下部に設
けられた原液供給口３ａから外容器３内に供給すること
によって、外容器３内に流入する気液混合流体が外容器
３と筒状カバー５との間を通って上方に流れるのを阻止
し、気液混合流体の大部分をカバー５の下方に位置する
窓５ａから優先的にカバー５内部の中空糸膜４に向けて
流すことができる。従って、気液混合流体による洗浄効
果を一層高めることができる。As the filter 1, a filter having a cylindrical cover 5 having a window 5a for covering the hollow fiber membrane 4 is used.
By using a cylindrical cover 5 provided with a barrier ring 5b on its outer wall, a gas-liquid mixed fluid is supplied into the outer container 3 from a stock solution supply port 3a provided at a lower portion of the outer container 3, The gas-liquid mixed fluid flowing into the outer container 3 is prevented from flowing upward through the space between the outer container 3 and the cylindrical cover 5, and most of the gas-liquid mixed fluid is located below the cover 5. 5 a can be preferentially directed toward the hollow fiber membrane 4 inside the cover 5. Therefore, the cleaning effect by the gas-liquid mixed fluid can be further enhanced.
【００２６】なお、上記例の洗浄方法を適用したろ過装
置では、ろ過材として中空糸膜を用いたが、本発明のフ
ィルターの洗浄方法は、これに限らず、中空糸タイプ以
外の膜や、活性炭などをろ過材として用いたろ過装置に
適用することも可能である。また、障壁リング５ｂは、
外容器３の内壁に設けてもよい。In the filtration apparatus to which the cleaning method of the above example is applied, a hollow fiber membrane is used as a filtering material. However, the cleaning method of the filter of the present invention is not limited to this, and membranes other than the hollow fiber type may be used. It is also possible to apply to a filtration device using activated carbon or the like as a filtering material. The barrier ring 5b is
It may be provided on the inner wall of the outer container 3.
【００２７】[0027]
【発明の効果】以上説明したように、本発明のフィルタ
ーの洗浄方法にあっては、原液と空気とを混合した気液
混合流体を外容器内に加圧して供給するバブリング工程
を有するので、ろ過材上の堆積物を効率よく剥離し、高
い洗浄効果を得ることができる。また、例えばエンジン
などの、電源を必要としない駆動源を用いて駆動させる
ことができるポンプのみを用いて実施することができ
る。従って、室外や僻地などの電源のない場所での実施
や、停電時などの電力供給が絶たれた場合における実施
が可能となる。また、上記バブリング工程に先立ち、ろ
液を蓄圧して貯え、この蓄圧されたろ液を短時間にろ過
材に逆流させる逆洗工程を行うことによって、洗浄効果
をより高めることができる。As described above, the method for cleaning a filter according to the present invention includes a bubbling step of supplying a gas-liquid mixed fluid obtained by mixing an undiluted solution and air into an outer container by pressurization. The deposit on the filter medium can be efficiently peeled off, and a high cleaning effect can be obtained. In addition, the present invention can be implemented using only a pump that can be driven using a drive source that does not require a power supply, such as an engine. Therefore, the present invention can be implemented in a place without a power source such as an outdoor place or a remote place, or in a case where power supply is cut off at the time of a power outage or the like. In addition, prior to the bubbling step, a backwashing step of accumulating and storing the filtrate and back-flowing the accumulated filtrate to the filter material in a short time can further enhance the cleaning effect.
【図１】 本発明のフィルターの洗浄方法の一例を実施
するために用いられるろ過装置を示すフロー図である。FIG. 1 is a flowchart showing a filtration device used for carrying out an example of a filter cleaning method of the present invention.
【図２】 従来のフィルターの洗浄方法の一例を実施す
るために用いられるろ過装置を示すフロー図である。FIG. 2 is a flow chart showing a filtration device used to carry out an example of a conventional filter cleaning method.
１・・・フィルター ２・・・ろ液供給部 ３・・・外容器 ４・・・中空糸膜（ろ過材） ５・・・筒状カバー ５ａ・・・窓 DESCRIPTION OF SYMBOLS 1 ... Filter 2 ... Filtrate supply part 3 ... Outer container 4 ... Hollow fiber membrane (filter material) 5 ... Cylindrical cover 5a ... Window
Claims (3)
態で供給される原液をろ過するろ過材を有するフィルタ
ーを洗浄する方法であって、原液と空気とを混合した気
液混合流体を外容器に加圧して供給し、フィルターのろ
過材を振動させるバブリング工程を有することを特徴と
するフィルターの洗浄方法。1. A method for cleaning a filter which is contained in an outer container and has a filter medium for filtering a stock solution supplied in a pressurized state into the outer container, the gas-liquid mixing comprising mixing the stock solution and air. A method of cleaning a filter, comprising a bubbling step of supplying a fluid under pressure to an outer container and vibrating a filter medium of the filter.
おいて、前記バブリング工程に先立ち、ろ過材を通過し
たろ液を蓄圧して貯え、この蓄圧されたろ液を短時間に
ろ過材に逆流させる逆洗工程を行うことを特徴とするフ
ィルターの洗浄方法。2. The method for cleaning a filter according to claim 1, wherein prior to the bubbling step, the filtrate that has passed through the filter medium is accumulated and stored, and the accumulated filtrate is returned to the filter medium in a short time. A method for washing a filter, comprising performing a washing step.
浄方法において、ろ過材が中空糸膜であり、フィルター
がこの中空糸膜のろ過材を覆う窓付きの筒状カバーを有
しており、気液混合流体をカバーの下方に位置する窓か
ら優先的に内部のろ過材に向けて流すようにすることを
特徴とするフィルターの洗浄方法。3. The method for cleaning a filter according to claim 1, wherein the filter is a hollow fiber membrane, and the filter has a cylindrical cover with a window covering the filter of the hollow fiber membrane. A method for cleaning a filter, wherein a gas-liquid mixed fluid is caused to flow preferentially from a window located below a cover toward an internal filter medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3951797A JPH10235168A (en) | 1997-02-24 | 1997-02-24 | Filter cleaning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3951797A JPH10235168A (en) | 1997-02-24 | 1997-02-24 | Filter cleaning method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10235168A true JPH10235168A (en) | 1998-09-08 |
Family
ID=12555244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3951797A Withdrawn JPH10235168A (en) | 1997-02-24 | 1997-02-24 | Filter cleaning method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10235168A (en) |
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008525167A (en) * | 2004-12-24 | 2008-07-17 | シーメンス・ウォーター・テクノロジーズ・コーポレーション | Simple gas cleaning method and apparatus in the technical field |
| JP2008207158A (en) * | 2007-02-28 | 2008-09-11 | Mrc Home Products Kk | Water purifying device |
| WO2009087750A1 (en) | 2008-01-04 | 2009-07-16 | Freund Corporation | Filter cleaning apparatus and method of cleaning filter |
| US8182687B2 (en) | 2002-06-18 | 2012-05-22 | Siemens Industry, Inc. | Methods of minimising the effect of integrity loss in hollow fibre membrane modules |
| US8268176B2 (en) | 2003-08-29 | 2012-09-18 | Siemens Industry, Inc. | Backwash |
| US8287743B2 (en) | 2007-05-29 | 2012-10-16 | Siemens Industry, Inc. | Membrane cleaning with pulsed airlift pump |
| US8293098B2 (en) | 2006-10-24 | 2012-10-23 | Siemens Industry, Inc. | Infiltration/inflow control for membrane bioreactor |
| US8318028B2 (en) | 2007-04-02 | 2012-11-27 | Siemens Industry, Inc. | Infiltration/inflow control for membrane bioreactor |
| CN102895879A (en) * | 2012-09-03 | 2013-01-30 | Acs农化系统有限公司 | Method and apparatus for improving membrane filtration process |
| US8377305B2 (en) | 2004-09-15 | 2013-02-19 | Siemens Industry, Inc. | Continuously variable aeration |
| US8382981B2 (en) | 2008-07-24 | 2013-02-26 | Siemens Industry, Inc. | Frame system for membrane filtration modules |
| US8758621B2 (en) | 2004-03-26 | 2014-06-24 | Evoqua Water Technologies Llc | Process and apparatus for purifying impure water using microfiltration or ultrafiltration in combination with reverse osmosis |
| 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 |
| US9022224B2 (en) | 2010-09-24 | 2015-05-05 | Evoqua Water Technologies Llc | Fluid control manifold for membrane filtration system |
| 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 |
| US9815027B2 (en) | 2012-09-27 | 2017-11-14 | Evoqua Water Technologies Llc | Gas scouring apparatus for immersed membranes |
| 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 |
| US9962865B2 (en) | 2012-09-26 | 2018-05-08 | Evoqua Water Technologies Llc | Membrane potting methods |
| US10322375B2 (en) | 2015-07-14 | 2019-06-18 | Evoqua Water Technologies Llc | Aeration device for filtration system |
| US10427102B2 (en) | 2013-10-02 | 2019-10-01 | Evoqua Water Technologies Llc | Method and device for repairing a membrane filtration module |
-
1997
- 1997-02-24 JP JP3951797A patent/JPH10235168A/en not_active Withdrawn
Cited By (39)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8182687B2 (en) | 2002-06-18 | 2012-05-22 | Siemens Industry, Inc. | Methods of minimising the effect of integrity loss in hollow fibre membrane modules |
| US8268176B2 (en) | 2003-08-29 | 2012-09-18 | Siemens Industry, Inc. | Backwash |
| US8758621B2 (en) | 2004-03-26 | 2014-06-24 | Evoqua Water Technologies Llc | Process and apparatus for purifying impure water using microfiltration or ultrafiltration in combination with reverse osmosis |
| US8377305B2 (en) | 2004-09-15 | 2013-02-19 | Siemens Industry, Inc. | Continuously variable aeration |
| JP2008525167A (en) * | 2004-12-24 | 2008-07-17 | シーメンス・ウォーター・テクノロジーズ・コーポレーション | Simple gas cleaning method and apparatus in the technical field |
| JP2012055890A (en) * | 2004-12-24 | 2012-03-22 | Siemens Water Technologies Corp | Simple gas scouring method and apparatus |
| 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 |
| US8293098B2 (en) | 2006-10-24 | 2012-10-23 | Siemens Industry, Inc. | Infiltration/inflow control for membrane bioreactor |
| JP2008207158A (en) * | 2007-02-28 | 2008-09-11 | Mrc Home Products Kk | Water purifying device |
| US8318028B2 (en) | 2007-04-02 | 2012-11-27 | Siemens Industry, Inc. | Infiltration/inflow control for membrane bioreactor |
| US9764288B2 (en) | 2007-04-04 | 2017-09-19 | Evoqua Water Technologies Llc | Membrane module protection |
| US10507431B2 (en) | 2007-05-29 | 2019-12-17 | Evoqua Water Technologies Llc | Membrane cleaning with pulsed airlift pump |
| US8372276B2 (en) | 2007-05-29 | 2013-02-12 | Siemens Industry, Inc. | Membrane cleaning with pulsed airlift pump |
| US8287743B2 (en) | 2007-05-29 | 2012-10-16 | Siemens Industry, Inc. | Membrane cleaning with pulsed airlift pump |
| US8840783B2 (en) | 2007-05-29 | 2014-09-23 | Evoqua Water Technologies Llc | Water treatment membrane cleaning with pulsed airlift pump |
| US9206057B2 (en) | 2007-05-29 | 2015-12-08 | 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 |
| WO2009087750A1 (en) | 2008-01-04 | 2009-07-16 | Freund Corporation | Filter cleaning apparatus and method of cleaning filter |
| US9023206B2 (en) | 2008-07-24 | 2015-05-05 | Evoqua Water Technologies Llc | Frame system for membrane filtration modules |
| US8382981B2 (en) | 2008-07-24 | 2013-02-26 | Siemens Industry, Inc. | Frame system for membrane filtration modules |
| US8956464B2 (en) | 2009-06-11 | 2015-02-17 | Evoqua Water Technologies Llc | Method of cleaning membranes |
| US9914097B2 (en) | 2010-04-30 | 2018-03-13 | Evoqua Water Technologies Llc | Fluid flow distribution device |
| US10441920B2 (en) | 2010-04-30 | 2019-10-15 | 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 |
| 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 |
| 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 |
| CN102895879A (en) * | 2012-09-03 | 2013-01-30 | Acs农化系统有限公司 | Method and apparatus for improving membrane filtration process |
| 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 |
| US10322375B2 (en) | 2015-07-14 | 2019-06-18 | Evoqua Water Technologies Llc | Aeration device for filtration system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH10235168A (en) | Filter cleaning method | |
| CN1551796B (en) | Method of cleaning membrane modules | |
| CN100588450C (en) | Improved methods of cleaning membrane modules | |
| JP2000317276A (en) | Filtering device | |
| JP2002058968A (en) | Filter | |
| JP4211400B2 (en) | Operation method of hollow fiber membrane filtration device | |
| WO1996029142A1 (en) | Method of desalinating saline water and apparatus therefor | |
| JPS62502452A (en) | Variable volume filter or concentrator | |
| JPH11156166A (en) | Cleaning method for hollow fiber membrane module | |
| JPH09138298A (en) | Filter using hollow-fiber membrane and method for backwashing it | |
| WO1996000121A1 (en) | Filtration apparatus with filtrate recovery device | |
| JPH02126922A (en) | Back washing method of separating membrane | |
| JPH0768139A (en) | Method for backwashing hollow-fiber membrane module | |
| JPH05154356A (en) | Membrane filter module | |
| JP2709026B2 (en) | Membrane separation device and cleaning method thereof | |
| JP2009241043A (en) | Backwashing method of membrane filter apparatus | |
| JP3349649B2 (en) | Membrane filtration device | |
| JPH08206656A (en) | Washing waste water treatment device of membrane filter apparatus | |
| JP2004216264A (en) | Hollow fiber membrane filteration apparatus provided with air tank for back washing | |
| JPH01104309A (en) | Washing method for membrane module | |
| JP2002113333A (en) | Hollow fiber membrane module | |
| JPH11290617A (en) | Filter | |
| JP4017262B2 (en) | Tank type filtration device using hollow fiber membrane module | |
| JPH038419A (en) | Method for preventing clogging of filter membrane of liquid filter device and liquid filter device | |
| JPS63302910A (en) | Method for washing porous filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20040511 |