JP3488535B2 - Chemical solution cleaning method for membrane in immersion type membrane filtration device and chemical solution cleaning device - Google Patents
Chemical solution cleaning method for membrane in immersion type membrane filtration device and chemical solution cleaning deviceInfo
- Publication number
- JP3488535B2 JP3488535B2 JP03886595A JP3886595A JP3488535B2 JP 3488535 B2 JP3488535 B2 JP 3488535B2 JP 03886595 A JP03886595 A JP 03886595A JP 3886595 A JP3886595 A JP 3886595A JP 3488535 B2 JP3488535 B2 JP 3488535B2
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- Prior art keywords
- membrane
- chemical
- chemical solution
- cleaning
- solution
- 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、浸漬槽内に浸漬した膜
により原水を濾過する浸漬型膜濾過装置に係り、その浸
漬槽内の膜を薬液により洗浄する膜の薬液洗浄方法及び
薬液洗浄装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an immersion type membrane filtration device for filtering raw water with a membrane immersed in an immersion tank, and a method for cleaning a membrane in the immersion tank with a chemical solution and a chemical solution cleaning. Regarding the device.
【０００２】[0002]
【従来の技術】従来、原水が貯留された浸漬槽内に膜
（膜モジュールともいう）を浸漬して膜の濾過作用で原
水を浄化する浸漬型の膜濾過装置がある。この膜濾過装
置において、膜濾過を継続すると、濁質等により膜に目
詰まりが生じ濾過効率が低下するので、一定時間使用し
たら膜を洗浄するようにしている。2. Description of the Related Art Conventionally, there is an immersion type membrane filtration device in which a membrane (also referred to as a membrane module) is immersed in an immersion tank in which raw water is stored to purify the raw water by a filtering action of the membrane. In this membrane filtration device, when the membrane filtration is continued, the membrane is clogged with turbidity or the like to lower the filtration efficiency. Therefore, the membrane is washed after a certain period of use.
【０００３】この洗浄方法としては、処理水を膜の処理
水側から原水側に逆流させて洗浄する逆洗浄を行った
り、浸漬槽内の膜の下方に設けたエアーノズルからの気
泡により膜の表面を洗浄するものなどがある。As this cleaning method, backwashing is carried out in which the treated water is backwashed from the treated water side of the membrane to the raw water side, or the membrane is formed by air bubbles from an air nozzle provided below the membrane in the dipping tank. There are things such as cleaning the surface.
【０００４】さらに、一定期間使用すると、濁質等が膜
内部まで入り込み、上記洗浄による効果が著しく低下す
るので、洗浄用の薬液を使用して膜を洗浄することにな
る。この場合、膜を装置から取り外して、洗浄用の薬液
が貯留された薬液洗浄槽内に浸漬させて膜の薬液洗浄を
行っていた。Further, when it is used for a certain period of time, suspended matters and the like enter the inside of the membrane and the effect of the above-mentioned cleaning is remarkably reduced, so that the membrane is cleaned using a cleaning chemical solution. In this case, the membrane is removed from the apparatus and immersed in the chemical cleaning tank in which the cleaning chemical is stored to clean the membrane with the chemical.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、従来の
薬液洗浄では、次のような問題点がある。膜を膜濾過装
置から取り外して薬液洗浄槽内に浸漬するので、クレー
ン等、膜の移動および取り外し・取り付けのための設備
が必要となる。また、取り外し・取り付け作業に時間が
かかるので、膜濾過装置の可動率が低下する。さらに、
膜を薬液洗浄槽内に浸漬して洗浄するので、洗浄用の薬
液が多量に必要となりコスト高となる。However, the conventional chemical cleaning has the following problems. Since the membrane is removed from the membrane filtration device and immersed in the chemical cleaning tank, equipment such as a crane for moving and removing / attaching the membrane is required. In addition, since it takes time to remove and attach the work, the mobility of the membrane filtration device is lowered. further,
Since the membrane is immersed in the chemical cleaning bath for cleaning, a large amount of cleaning chemical is required, resulting in high cost.
【０００６】本発明は、上記問題点に鑑みてなされたも
ので、膜の移動等の設備を不要とし、洗浄時間を短縮で
きると共に、少量の薬液で洗浄が行える膜の薬液洗浄方
法及び薬液洗浄装置を提供することにある。The present invention has been made in view of the above-mentioned problems, and eliminates the need for equipment such as movement of the membrane, shortens the cleaning time, and can clean the membrane with a small amount of chemical liquid. To provide a device.
【０００７】[0007]
【課題を解決するための手段】本発明は上記課題を解決
するため、次のように構成した。浸漬槽内に浸漬した膜
モジュールの膜により原水を濾過して処理水を膜モジュ
ール内の両方の端部から取り出す浸漬型膜濾過装置を用
いて、前記膜モジュールの一方の端部に透過水路を介し
て薬液供給手段から洗浄用の薬液を供給し、前記膜モジ
ュールの他方の端部から薬液排水路を介して前記薬液を
外部に排出する膜の薬液洗浄方法であって、前記薬液排
水路を閉じた状態で、前記薬液供給手段から前記透過水
路を介して膜の内側内に薬液を供給し、前記膜の内側か
ら前記膜内部に浸透させて前記膜内部に詰まった濁質等
を溶解した後、さらに供給する薬液を前記膜内に押し込
んで前記薬液を内側から外側に向けて流出させ、その
後、前記薬液排水路を開いて前記薬液を外部に排出する
ことを特徴とする膜の薬液洗浄方法とした。また、前記
薬液供給手段は、前記透過水路から膜モジュールの膜内
に前記薬液とこの薬液とは別の薬液を供給して、薬液の
入れ替えを行うようにしてもよい。 In order to solve the above problems, the present invention has the following structure. The raw water is filtered by the membrane of the membrane module immersed in the immersion tank to treat the treated water in the membrane module.
Using a submerged membrane filtration device that is extracted from both ends of the membrane module, one end of the membrane module is supplied with a chemical solution for cleaning from a chemical solution supply means through a permeate channel, and the other of the membrane module is supplied. Is a method for cleaning a membrane to discharge the chemical solution to the outside from an end portion of the chemical solution via a chemical solution drainage channel.
With the water channel closed, the permeated water is discharged from the chemical liquid supply means.
A chemical solution is supplied to the inside of the membrane through a channel, and
Suspended in the membrane by permeating the inside of the membrane
After dissolving the solution, push the supplied chemical solution into the membrane.
Then, let the drug solution flow out from the inside to the outside,
Then, the chemical liquid drainage channel is opened to discharge the chemical liquid to the outside, which is a method for cleaning a chemical liquid of a membrane. Also, the above
The chemical liquid supply means is provided in the membrane of the membrane module from the permeate channel.
To the above-mentioned chemical solution and a chemical solution different from this chemical solution,
You may make it replace.
【０００８】また、浸漬槽内に浸漬した膜モジュールの
膜により原水を濾過して処理水を膜モジュール内の両方
の端部から取り出す浸漬型膜濾過装置であって、前記膜
モジュールの一方の端部に接続される透過水路と、前記
膜モジュールの他方の端部に接続される薬液排水路と、
前記透過水路から薬液を前記膜の内側内に供給する薬液
供給手段とを備えていて、該薬液供給手段は多量の洗浄
用の薬液を供給する多量薬液供給手段と少量の洗浄用の
薬液を供給する少量薬液供給手段とを有していて、前記
多量薬液供給手段によって膜の内側内に薬液を供給して
前記膜内部に浸透して詰まった濁質等を溶解し、さらに
少量薬液供給手段によって薬液を前記膜内に押し込んで
前記薬液を内側から外側に向けて流出させ、その後に前
記薬液排出路を開いて前記薬液を外部に排出させるよう
にしたことを特徴とする膜の薬液洗浄装置とした。尚、
薬液供給手段は、前記透過水路から膜モジュールの膜内
に前記薬液とこの薬液とは別の薬液を供給して、薬液の
入れ替えを行うようにしてもよい。Further, the raw water is filtered by the membrane of the membrane module immersed in the dipping tank so that the treated water is supplied to both the inside of the membrane module.
Is a submerged membrane filtration device taken out from the end of, the permeate channel connected to one end of the membrane module, and a chemical drainage channel connected to the other end of the membrane module,
And a chemical solution supply means for supplying a chemical solution from the permeate channel into the inside of the membrane, the chemical solution supply means washing a large amount.
For supplying a large amount of chemical liquid and a small amount of cleaning liquid
And a small amount liquid medicine supply means for supplying a liquid medicine,
By supplying a large amount of liquid medicine to the inside of the membrane
Permeates the inside of the membrane to dissolve clogged suspended matter, etc.
By pushing the drug solution into the membrane by means of a small amount drug solution supply means
Let the chemical flow out from the inside to the outside
Open the liquid medicine discharge path to discharge the liquid medicine to the outside.
That the the and a chemical cleaning device layer characterized by. still,
Chemical supply means, said supply another drug solution the the drug solution and the drug solution within the membrane from the transmission waterways membrane module may be performed replacement of chemical.
【０００９】[0009]
【作用】本発明によれば、次のように作用する。薬液供
給手段により洗浄用の薬液が膜モジュールの一方の端部
の透過水路を通って膜の処理水側から膜に供給され、薬
液が膜に浸透する。これにより膜が洗浄されることにな
る。そして膜モジュールの他方の端部の薬液排水路から
排出される。また、多量薬液供給手段と少量薬液供給手
段を備えているから、薬液が膜に浸透した後、供給する
薬液を少量に切り換えて原水側に流して洗浄する。これ
により、原水側に流出する薬液を少量におさえることが
できると共に、洗浄効果を向上させることができる。洗
浄後に膜モジュール内の薬液は他方の端部の薬液排出路
から外部へ排出される。その際、先に供給した薬液とは
別の薬液を膜モジュールの膜内に圧送すると共に先の薬
液を外部に排出して別の薬液と薬液の入れ替えが行われ
るようにしてもよい。 According to the present invention, it operates as follows. The chemical liquid supply means supplies the cleaning chemical liquid to the membrane from the treated water side of the membrane through the permeate water passage at one end of the membrane module, and the chemical liquid permeates the membrane. This will wash the membrane. Then, it is discharged from the chemical liquid drainage channel at the other end of the membrane module. Further, since a large amount of chemical liquid supply means and a small amount of chemical liquid supply means are provided , after the chemical liquid permeates the membrane, the chemical liquid to be supplied is switched to a small amount and flowed to the raw water side for washing. As a result, the chemical liquid flowing out to the raw water side can be kept small and the cleaning effect can be improved. Wash
After cleaning, the chemical liquid in the membrane module is the chemical liquid discharge path at the other end.
Is discharged from the outside. At that time , a chemical solution different from the previously supplied chemical solution may be pressure-fed into the membrane of the membrane module, and the previous chemical solution may be discharged to the outside so that the chemical solution is replaced with another chemical solution .
【００１０】[0010]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。図１から図４に、本実施例の薬液洗浄装置１が付
設された浸漬型膜濾過装置２を示す。Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show an immersion type membrane filtration device 2 provided with a chemical liquid cleaning device 1 of this embodiment.
【００１１】前記浸漬型膜濾過装置２は、原水が貯留さ
れる浸漬槽３と、この浸漬槽３内の原水中に浸漬された
膜モジュール４とを備えて概略構成されている。この膜
モジュール４は、中空糸膜４ａ（以下、膜４ａと記す）
を多数集積したもので、横置とし上下に２基配置してい
る。個々の膜４ａは両端部を夫々連結すると共に、両端
部で内側内を連通してある。この膜４ａは原水が膜４ａ
の外側（原水側）から膜４ａの内側（処理水側）に透過
して透過水（処理水）となる。The submerged membrane filtration device 2 is roughly constructed by including a submerged tank 3 in which raw water is stored, and a membrane module 4 submerged in the raw water in the submerged tank 3. This membrane module 4 is a hollow fiber membrane 4a (hereinafter referred to as membrane 4a).
A large number of these are integrated, and they are placed side by side and two are arranged above and below. Each of the membranes 4a has both ends connected to each other, and both ends communicate with each other inside. This membrane 4a is a raw water membrane 4a.
Permeate from the outside (raw water side) to the inside (treated water side) of the membrane 4a to become permeated water (treated water).
【００１２】前記膜モジュール４の両端部には、夫々配
管５，６を接続してあり、一方の配管６には開閉弁Ｖ１
を介装している。各配管５，６は、配管６に設けた開閉
弁Ｖ１よりも膜モジュール４側で、開閉弁Ｖ４を介して
接続している。配管６は開閉弁Ｖ１から更に延長されて
透過水路となっている。Pipes 5 and 6 are connected to both ends of the membrane module 4, and the open / close valve V1 is connected to one pipe 6.
Is intervening. The pipes 5 and 6 are connected to each other on the membrane module 4 side of the on-off valve V1 provided on the pipe 6 via the on-off valve V4. The pipe 6 is further extended from the on-off valve V1 to form a permeate channel.
【００１３】前記薬液洗浄装置１は、膜４ａに洗浄用の
薬液を膜４ａの内側から供給する薬液供給手段１０から
なり、この薬液供給手段１０には多量の薬液を供給する
大容量のポンプＰ１（多量薬液手段）と、少量の薬液を
供給する少容量のポンプＰ２（少量薬液手段）とを備え
ている。また、前記配管５の先端を二股に分岐して、一
方の分岐路には開閉弁Ｖ２を介装してエアー抜き排水路
とし、他方の分岐路には開閉弁Ｖ３を介装して薬液排水
路としている。The chemical liquid cleaning apparatus 1 comprises a chemical liquid supply means 10 for supplying a cleaning chemical liquid to the membrane 4a from the inside of the membrane 4a, and a large capacity pump P1 for supplying a large amount of chemical liquid to the chemical liquid supply means 10. It is provided with (a large amount liquid medicine means) and a small capacity pump P2 (a small amount liquid medicine means) for supplying a small amount of the liquid medicine. Further, the tip of the pipe 5 is bifurcated, and an opening / closing valve V2 is provided in one branch passage to form an air drainage passage, and an opening / closing valve V3 is provided in the other branch passage to drain chemical liquid. It is a road.
【００１４】また、開閉弁Ｖ１よりも膜モジュール４側
の配管６には、配管７を接続してあり、この配管７には
逆洗水用のポンプＰ３及び開閉弁Ｖ５を直列に介装して
ある。さらに、膜４ａを洗浄するための薬液を貯留する
薬品タンク８が設けられており、この薬品タンク８から
配管７に向けて配管９を設けている。この配管９にはポ
ンプＰ１を直列に介装していると共に、このポンプＰ１
と並列にポンプＰ２を接続してある。これらのポンプＰ
１，Ｐ２と配管７との間には開閉弁Ｖ６を介装してい
る。A pipe 7 is connected to a pipe 6 on the membrane module 4 side of the on-off valve V1, and a pump P3 for backwash water and an on-off valve V5 are connected in series to this pipe 7. There is. Further, a chemical tank 8 for storing a chemical liquid for cleaning the membrane 4a is provided, and a pipe 9 is provided from the chemical tank 8 toward the pipe 7. A pump P1 is installed in series in the pipe 9, and the pump P1
A pump P2 is connected in parallel with. These pumps P
An on-off valve V6 is interposed between the pipes 1 and P2 and the pipe 7.
【００１５】次に、浸漬型膜濾過装置２の作動と膜４ａ
の洗浄方法および薬液洗浄方法について説明する。Next, the operation of the submerged membrane filtration device 2 and the membrane 4a.
The cleaning method and the chemical cleaning method will be described.
【００１６】先ず、図４（ａ），（ｂ）を参照して、本
実施例の浸漬型膜濾過装置２により通常の濾過工程を行
う場合を示す。First, referring to FIGS. 4 (a) and 4 (b), a case where a normal filtration step is performed by the immersion type membrane filtration device 2 of the present embodiment will be described.
【００１７】すなわち、前記ポンプＰ１，Ｐ２，Ｐ３を
停止状態とし、開閉弁Ｖ２，Ｖ３，Ｖ５，Ｖ６を閉状態
にすると共に、開閉弁Ｖ１，Ｖ４を開状態にする。透過
水路に設けた図示しない吸引ポンプを作動すると、原水
が膜４ａの外側から膜４ａを介して膜４ａの内側に透過
し、濾過される。膜４ａの内側内の透過水は透過水路を
介して図示しない透過水槽に貯溜されることになる。That is, the pumps P1, P2, P3 are stopped, the opening / closing valves V2, V3, V5, V6 are closed, and the opening / closing valves V1, V4 are opened. When a suction pump (not shown) provided in the permeate channel is operated, raw water permeates from the outside of the membrane 4a through the membrane 4a to the inside of the membrane 4a and is filtered. The permeated water inside the membrane 4a is stored in a permeated water tank (not shown) through the permeated water passage.
【００１８】このように、濾過工程が所定時間（例え
ば、濾過時間が３０〜６０分）経ったら、膜４ａの目詰
まりを解消すべく、逆洗浄工程を所定時間（たとえば３
０〜６０秒間）行う。In this way, after the filtration step has passed a predetermined time (for example, a filtration time of 30 to 60 minutes), the back washing step is performed for a predetermined time (for example, 3 times) in order to eliminate clogging of the membrane 4a.
(0 to 60 seconds).
【００１９】すなわち、前記ポンプＰ１，Ｐ２を停止状
態にすると共に、ポンプＰ３を駆動状態とし、開閉弁Ｖ
１，Ｖ２，Ｖ３，Ｖ６を閉状態にすると共に、開閉弁Ｖ
４，Ｖ５を開状態にする。これにより、逆洗水がポンプ
Ｐ３によって膜４ａの内側内に圧送され、膜４ａの内側
から外側に向けて流出して膜４ａの目詰まりを解消す
る。逆洗水は前記した透過水槽からの透過水を使用する
のが通常であるが、別の逆洗用水槽からの水を使用して
もよい。That is, the pumps P1 and P2 are stopped, the pump P3 is driven, and the on-off valve V
1, V2, V3, V6 are closed and the on-off valve V
Open V4 and V5. As a result, the backwash water is pumped into the inside of the membrane 4a by the pump P3, flows out from the inside of the membrane 4a toward the outside, and the clogging of the membrane 4a is eliminated. As the backwash water, the permeated water from the above-mentioned permeated water tank is usually used, but water from another backwash water tank may be used.
【００２０】また、配管内にエアーが溜まる場合がある
ので、エアー抜き工程を設けてある。これは、前記ポン
プＰ１，Ｐ２を停止状態にすると共に、ポンプＰ３を駆
動状態とし、開閉弁Ｖ１，Ｖ３，Ｖ４，Ｖ６を閉状態に
すると共に、開閉弁Ｖ２，Ｖ５を開状態にする。これに
より、透過水槽からの透過水が循環し、配管内のエアー
が除去されることになる。Further, since air may accumulate in the pipe, an air venting process is provided. This puts the pumps P1 and P2 into the stopped state, puts the pump P3 into the driven state, closes the on-off valves V1, V3, V4 and V6, and opens the on-off valves V2 and V5. Thereby, the permeated water from the permeated water tank circulates and the air in the pipe is removed.
【００２１】前記浸漬型膜濾過装置２により長期間（た
とえば一ヶ月〜数カ月）濾過を行うと、逆洗浄しても膜
４ａの目詰まりを解消することができなくなるので、洗
浄用の薬液を用いた薬液洗浄工程を行う。この薬液洗浄
工程を図１から図３を用いて説明する。If filtration is carried out for a long time (for example, one month to several months) by the immersion type membrane filtration device 2, the clogging of the membrane 4a cannot be eliminated even by back washing, so that a cleaning chemical solution is used. The chemical solution cleaning process that was performed. This chemical cleaning step will be described with reference to FIGS.
【００２２】先ず、ポンプＰ２，Ｐ３を停止状態とし、
開閉弁Ｖ１，Ｖ２，Ｖ３，Ｖ４，Ｖ５を閉状態にすると
共に、開閉弁Ｖ６を開状態にする。ポンプＰ１を駆動す
ると、図１（ａ）に示すように、薬液タンク８内の薬液
が配管９，６を通って膜４ａの内側内に供給される。供
給された薬液は、膜４ａの内側から膜４ａ内部に浸透し
て、膜４ａ内部に詰まった濁質等を溶解することにな
る。First, the pumps P2 and P3 are stopped,
The on-off valves V1, V2, V3, V4 and V5 are closed, and the on-off valve V6 is opened. When the pump P1 is driven, as shown in FIG. 1A, the chemical liquid in the chemical liquid tank 8 is supplied into the inside of the membrane 4a through the pipes 9 and 6. The supplied chemical solution permeates from the inside of the film 4a into the inside of the film 4a, and dissolves suspended substances and the like that are clogged inside the film 4a.
【００２３】次に、ポンプＰ１，Ｐ３を停止状態とし、
ポンプＰ２を駆動すると、図２に示すように、薬液が膜
モジュール４の膜４ａの内部に押し込まれ、図２（ｂ）
に示すように、薬液が膜４ａの内側から膜４ａの内部を
介して外側に向けて流出する。この際、膜４ａの内部に
侵入した濁質等がほぼ完全に除去される。Next, the pumps P1 and P3 are stopped,
When the pump P2 is driven, the chemical liquid is pushed into the inside of the membrane 4a of the membrane module 4 as shown in FIG.
As shown in, the chemical solution flows out from the inside of the film 4a to the outside through the inside of the film 4a. At this time, turbid substances and the like that have entered the inside of the film 4a are almost completely removed.
【００２４】前記ポンプＰ２が一定時間駆動されたら、
ポンプＰ２，Ｐ３を停止状態とし、ポンプＰ１を駆動す
ると共に、開閉弁Ｖ３を開状態にする。これにより、図
３（ａ）に示すように、薬液タンク８に貯留された別の
薬液が膜モジュール４の膜内に圧送されると共に、開閉
弁Ｖ３を介して外部に排出され薬液の入れ替えが行われ
る。When the pump P2 is driven for a certain time,
The pumps P2 and P3 are stopped, the pump P1 is driven, and the on-off valve V3 is opened. As a result, as shown in FIG. 3A, another chemical solution stored in the chemical solution tank 8 is pressure-fed into the membrane of the membrane module 4 and is discharged to the outside through the on-off valve V3 to replace the chemical solution. Done.
【００２５】このように薬液洗浄工程が終わったら、通
常の濾過工程に移行する。しかし、膜４ａの内側内には
薬液が充填されたままであるので、通常の濾過工程の初
期段階においては透過水に薬液が混入するので、濾過工
程の初期の透過水を透過水槽には入れないで、他のタン
クに入れる。When the chemical cleaning step is completed in this way, the process proceeds to the normal filtration step. However, since the inside of the membrane 4a is still filled with the chemical liquid, the permeated water mixes with the permeated water in the initial stage of the normal filtration process, so the permeated water in the initial stage of the filtration process cannot be put into the permeated water tank. Then put it in another tank.
【００２６】なお、薬液は膜の種類や目詰まり物質の種
類に応じて適宜の種類が使用されるが、水酸化ナトリウ
ム溶液、塩酸溶液、次亜塩素ナトリウム溶液等が使用さ
れる。また、１種類の薬液を用いても、複数種類の薬液
を２段に分けて使用するようにしてもよい。この場合に
は、初めにアルカリ系の薬液を入れ、次に酸系の薬液を
入れるようにすることが好ましい。An appropriate type of chemical solution is used depending on the type of membrane and the type of clogging substance, and sodium hydroxide solution, hydrochloric acid solution, sodium hypochlorite solution, etc. are used. Further, one kind of chemical solution may be used, or plural kinds of chemical solutions may be divided into two stages and used. In this case, it is preferable that the alkaline chemical solution is first introduced, and then the acid chemical solution is introduced.
【００２７】本実施例の膜４ａの薬液洗浄装置及び薬液
洗浄方法によれば、薬液を膜モジュール４の膜４ａの内
側に洗浄用の薬液を充填させ、充填された薬液を膜４ａ
の内側から膜４ａの外側に向かって流出させて膜４ａを
洗浄するようにしているので、適宜の薬液を用いれば膜
４ａの目詰まりをほぼ完全に洗浄することができる。し
かも、使用できる状態で設置された膜４ａに薬液を充填
して洗浄するだけであるので、膜モジュール４を取り外
したりする必要がなく、浸漬型膜濾過装置２の停止期間
を最小限とすることができる。According to the chemical cleaning device and the chemical cleaning method for the membrane 4a of the present embodiment, the chemical is filled inside the membrane 4a of the membrane module 4 with the chemical for cleaning, and the filled chemical is filled in the membrane 4a.
Since the membrane 4a is washed out by flowing out from the inside to the outside of the membrane 4a, the clogging of the membrane 4a can be almost completely washed by using an appropriate chemical solution. Moreover, it is not necessary to remove the membrane module 4 since the membrane 4a installed in a ready-to-use state is only filled with the chemical liquid and washed, and the period of suspension of the submerged membrane filtration device 2 is minimized. You can
【００２８】なお、図５に示すように、上記実施例と同
様な水路を並列に複数（図中では７組）設けるようにし
てもよい。As shown in FIG. 5, a plurality of water channels (seven sets in the figure) may be provided in parallel as in the above embodiment.
【００２９】本発明は上記実施例に限るものではなく、
例えば、中空糸膜に変えて平膜やスパイラル膜および管
状膜等を使用してもよい。また、薬液供給手段が流量を
変えられる１台のポンプであってもよく、一定量の定量
ポンプと流量制御弁を組合わせたものでもよい。さら
に、一台のポンプで薬液を供給するだけでもよく、その
薬液を膜を介して循環させるようにしてもよい。The present invention is not limited to the above embodiment,
For example, a flat membrane, a spiral membrane, a tubular membrane, or the like may be used instead of the hollow fiber membrane. Further, the chemical liquid supply means may be a single pump whose flow rate can be changed, or may be a combination of a fixed amount of metering pump and a flow rate control valve. Further, the chemical solution may be supplied by only one pump, or the chemical solution may be circulated through the membrane.
【００３０】[0030]
【発明の効果】本発明は、以上のように構成したので、
次のような効果がある。膜に洗浄用の薬液をその膜の処
理水側から供給して洗浄するので、膜を浸漬槽内に浸漬
した状態で洗浄することができる。よって、クレーン
等、膜の移動および取り外し・取り付けのための設備が
不要となる。また、取り外し・取付け作業の時間が不要
となるので、装置の稼動率が向上する。さらに、洗浄用
の薬液は膜に供給する量となるので、膜を薬液洗浄槽内
に浸漬して洗浄するのに比して、薬液が少量ですみ、低
コストにできる。また、薬液が膜に浸透した後、供給す
る薬液を少量に切り換えて原水側に流して洗浄するの
で、原水側に流出する薬液を少量におさえることができ
ると共に、洗浄効果を向上させることができる。 Since the present invention is constructed as described above,
It has the following effects. Since the cleaning chemical is supplied to the membrane from the treated water side of the membrane for cleaning, the membrane can be cleaned while being immersed in the immersion tank. Therefore, equipment for moving and removing / attaching the membrane, such as a crane, becomes unnecessary. In addition, since the time required for the removal / attachment work is unnecessary, the operation rate of the device is improved. Further, since the amount of the chemical liquid for cleaning is supplied to the membrane, the amount of the chemical liquid can be small and the cost can be reduced as compared with the case where the membrane is immersed in the chemical liquid cleaning tank for cleaning. Also, after the drug solution penetrates the membrane,
Change the amount of chemical solution to a small amount and flush it to the raw water side for cleaning
With this, it is possible to reduce the amount of chemical liquid that flows out to the raw water side.
In addition, the cleaning effect can be improved.
【００３１】[0031]
【図１】本発明の実施例の膜の薬液洗浄装置及びこれを
用いた薬洗工程の一工程を示す図である。FIG. 1 is a diagram showing one step of a chemical cleaning device for a membrane and a chemical cleaning process using the same according to an embodiment of the present invention.
【図２】図１の膜の薬液洗浄装置を用いた薬洗工程の一
工程を示す図である。FIG. 2 is a diagram showing one process of a chemical cleaning process using the chemical cleaning device for the membrane of FIG.
【図３】図１の膜の薬液洗浄装置を用いた薬洗工程の一
工程を示す図である。FIG. 3 is a diagram showing one process of a chemical cleaning process using the chemical cleaning device for the membrane of FIG.
【図４】図１の膜の薬液洗浄装置が付設された膜濾過装
置による通常の濾過工程を示す図である。FIG. 4 is a diagram showing a normal filtration process by a membrane filtration device provided with the membrane chemical cleaning device of FIG. 1.
【図５】本発明の他の実施例の膜の薬液洗浄装置を示す
図である。FIG. 5 is a diagram showing a chemical cleaning device for a membrane according to another embodiment of the present invention.
１：薬液洗浄装置 ２：浸漬型膜濾過装置 ３：浸漬槽 ４：膜モジュール ４ａ：中空糸膜（膜） ５，６：配管 １０：薬液供給手段 Ｖ１，Ｖ２，Ｖ３，Ｖ４，Ｖ５，Ｖ６ 開閉弁 Ｐ１：ポンプ（多量薬液手段） Ｐ２：ポンプ（少量薬液手段） Ｐ３：ポンプ 1: Chemical cleaning device 2: Immersion type membrane filtration device 3: Immersion tank 4: Membrane module 4a: hollow fiber membrane (membrane) 5, 6: Piping 10: Medication supply means V1, V2, V3, V4, V5, V6 open / close valve P1: Pump (Means for high-volume liquid medicine) P2: Pump (Means for small amount liquid medicine) P3: Pump
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−225805（ＪＰ，Ａ) 特開 平３−77629（ＪＰ，Ａ) 特開 平５−285354（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B01D 65/02 C02F 1/44 ─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-4-225805 (JP, A) JP-A-3-77629 (JP, A) JP-A-5-285354 (JP, A) (58) Field (Int.Cl. 7 , DB name) B01D 65/02 C02F 1/44
Claims (4)
より原水を濾過して処理水を膜モジュール内の両方の端
部から取り出す浸漬型膜濾過装置を用いて、前記膜モジ
ュールの一方の端部に透過水路を介して薬液供給手段か
ら洗浄用の薬液を供給し、前記膜モジュールの他方の端
部から薬液排水路を介して前記薬液を外部に排出する膜
の薬液洗浄方法であって、 前記薬液排水路を閉じた状態で、前記薬液供給手段から
前記透過水路を介して膜の内側内に前記薬液を供給し、
前記膜の内側から前記膜内部に浸透させて前記膜内部に
詰まった濁質等を溶解した後、さらに供給する前記薬液
を前記膜内に押し込んで前記薬液を内側から外側に向け
て流出させ、その後、前記薬液排水路を開いて前記薬液
を外部に排出する ことを特徴とする浸漬型膜濾過装置に
おける膜の薬液洗浄方法。1. Raw water is filtered by a membrane of a membrane module immersed in a dipping tank to process treated water at both ends in the membrane module.
Using a submerged type membrane filtration device that is taken out from the chamber , one side of the membrane module is connected to the chemical liquid supply means through the permeate channel .
Supplying a chemical solution for al cleaning film for discharging the liquid medicine to the outside through the chemical liquid drainage from the other end of the membrane module
The method for cleaning a chemical solution according to claim 1, wherein the chemical solution drain means closes the chemical solution from the chemical solution supply means.
Supplying the chemical solution inside the membrane through the permeate channel,
The inside of the membrane is permeated from the inside of the membrane to the inside of the membrane.
The above-mentioned chemical liquid to be further supplied after dissolving the clogged suspended matter, etc.
To push the drug solution from the inside to the outside.
The chemical liquid and then drain the chemical liquid to open the chemical liquid drainage channel.
The method of cleaning a membrane in a submerged membrane filtration device with a chemical solution, the method comprising:
モジュールの膜内に前記薬液とこの薬液とは別の薬液を
供給して、薬液の入れ替えを行うようにしたことを特徴
とする請求項１に記載の浸漬型膜濾過装置における膜の
薬液洗浄方法。2. The chemical liquid supply means is a membrane from the permeate channel.
In the membrane of the module, the above-mentioned chemical solution and another chemical solution different from this chemical solution
Characterized by supplying and replacing chemical liquids
The method for cleaning a membrane with a chemical liquid in the immersion type membrane filtration device according to claim 1 .
り原水を濾過して処理水を膜モジュール内の両方の端部
から取り出す浸漬型膜濾過装置であって、前記膜モジュ
ールの一方の端部に接続される透過水路と、前記膜モジ
ュールの他方の端部に接続される薬液排水路と、前記透
過水路から薬液を前記膜の内側内に供給する薬液供給手
段とを備えていて、該薬液供給手段は多量の洗浄用の薬
液を供給する多量薬液供給手段と少量の洗浄用の薬液を
供給する少量薬液供給手段とを有していて、 前記多量薬液供給手段によって膜の内側内に薬液を供給
して前記膜内部に浸透して詰まった濁質等を溶解し、さ
らに少量薬液供給手段によって薬液を前記膜内に押し込
んで前記薬液を内側から外側に向けて流出させ、その後
に前記薬液排出路を開いて前記薬液を外部に排出させる
ようにした ことを特徴とする浸漬型膜濾過装置における
膜の薬液洗浄装置。3. The raw water is filtered by the membrane of the membrane module immersed in the immersion tank to process the treated water at both ends of the membrane module.
An immersion type membrane filtration device that is taken out from a permeate channel connected to one end of the membrane module, a chemical drainage channel connected to the other end of the membrane module, and a chemical solution from the permeate channel. A chemical solution supply means for supplying the inside of the membrane , wherein the chemical solution supply means supplies a large amount of cleaning chemicals.
A large amount of chemical supply means for supplying liquid and a small amount of cleaning chemical
A small amount of chemical liquid supply means for supplying, and the large amount of chemical liquid supply means supplies the chemical liquid to the inside of the membrane.
Then, it permeates the inside of the membrane and dissolves the suspended substances, etc.
In addition, the drug solution is pushed into the membrane by a small amount drug solution supply means.
Then let the drug solution flow from the inside to the outside, and then
To open the chemical liquid discharge passage to discharge the chemical liquid to the outside
A chemical cleaning device for a membrane in an immersion type membrane filtration device characterized by the above .
膜モジュールの膜内に前記薬液とこの薬液とは別の薬液
を供給して、薬液の入れ替えを行うようにしたことを特
徴とする請求項３に記載の浸漬型膜濾過装置における膜
の薬液洗浄装置。Wherein said chemical solution supply means, said supply another drug solution the the drug solution and the drug solution within the membrane from the transmission waterways membrane module, according to, characterized in that to perform the replacement of the chemical Item 4. A membrane chemical cleaning device in the immersion type membrane filtration device according to item 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03886595A JP3488535B2 (en) | 1995-02-27 | 1995-02-27 | Chemical solution cleaning method for membrane in immersion type membrane filtration device and chemical solution cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03886595A JP3488535B2 (en) | 1995-02-27 | 1995-02-27 | Chemical solution cleaning method for membrane in immersion type membrane filtration device and chemical solution cleaning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08229362A JPH08229362A (en) | 1996-09-10 |
| JP3488535B2 true JP3488535B2 (en) | 2004-01-19 |
Family
ID=12537108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03886595A Expired - Fee Related JP3488535B2 (en) | 1995-02-27 | 1995-02-27 | Chemical solution cleaning method for membrane in immersion type membrane filtration device and chemical solution cleaning device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3488535B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6303035B1 (en) | 1999-07-30 | 2001-10-16 | Zenon Environmental Inc. | Immersed membrane filtration process |
| US6547968B1 (en) | 1999-07-30 | 2003-04-15 | Zenon Environmental Inc. | Pulsed backwash for immersed membranes |
| AU6419000A (en) * | 1999-07-29 | 2001-02-19 | Zenon Environmental Inc. | Maintenance cleaning for membranes |
| JP2001070763A (en) * | 1999-09-08 | 2001-03-21 | Asahi Kasei Corp | Membrane washing method |
| JP4382275B2 (en) * | 2000-12-15 | 2009-12-09 | 前澤工業株式会社 | Membrane module cleaning method |
| JP2005211847A (en) * | 2004-01-30 | 2005-08-11 | Tsukishima Kikai Co Ltd | Filtering device |
| KR101447954B1 (en) * | 2007-07-18 | 2014-10-13 | 주식회사 퓨어엔비텍 | A membrane module cassette train with a vertical type manifold and the cleaning method |
| JP4840285B2 (en) * | 2007-08-10 | 2011-12-21 | 東レ株式会社 | Cleaning method for submerged membrane module |
-
1995
- 1995-02-27 JP JP03886595A patent/JP3488535B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08229362A (en) | 1996-09-10 |
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