【０００１】[0001]
【発明の属する技術分野】本発明は、膜モジュールの洗
浄方法及び膜ろ過装置に関し、詳しくは、浸漬型中空糸
膜モジュールの薬液洗浄を効率よく行う方法及び該方法
を実施することができる膜ろ過装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cleaning a membrane module and a membrane filtration apparatus, and more particularly, to a method for efficiently cleaning a immersion type hollow fiber membrane module with a chemical solution and a membrane filtration method capable of performing the method. Related to the device.
【０００２】[0002]
【従来の技術】各種水処理における固液分離手段として
近年急速に実用化が進んでいる浸漬型中空糸膜モジュー
ルを使用した膜ろ過装置は、タンクあるいは既存の池等
に膜モジュールを浸漬することで処理が可能なことか
ら、シンプルでコンパクトな装置構成で確実な固液分離
を行えるという利点を有している。しかし、固液分離の
進行に伴い、膜に有機物や金属、生物スライム等が付着
し、これらが、膜表面だけでなく、膜孔内あるいは膜繊
維の中にまで入り込み、これを放置しておくと目詰まり
が発生してろ過機能が失われてしまう。2. Description of the Related Art A membrane filtration apparatus using a submerged hollow fiber membrane module, which has been rapidly commercialized in recent years as a solid-liquid separation means in various water treatments, involves immersing a membrane module in a tank or an existing pond. Therefore, there is an advantage that solid-liquid separation can be reliably performed with a simple and compact device configuration. However, with the progress of solid-liquid separation, organic substances, metals, biological slime, etc. adhere to the membrane, and these penetrate not only on the membrane surface but also into the membrane pores or membrane fibers, and are left undisturbed. Clogging occurs and the filtration function is lost.
【０００３】したがって、従来から、膜の目詰まりを防
止するため、所定期間毎に薬液によって膜を洗浄するこ
とが行われており、膜の種類や付着物の性状に応じてア
ルカリ、酸、酸化剤等を使用して付着物を除去するよう
にしている。洗浄方法としては、膜モジュールをろ過槽
から別に設けた薬液洗浄槽に移して薬液洗浄を行う方法
や、膜の透過水側から薬液を注入して行う方法が行われ
ている。Therefore, in order to prevent the film from being clogged, the film is conventionally washed with a chemical solution at predetermined intervals, and alkali, acid, oxidization, etc. are selected according to the type of the film and the nature of the deposit. Deposits are removed using an agent or the like. As a cleaning method, a method in which a membrane module is transferred from a filtration tank to a separate chemical cleaning tank to perform chemical cleaning, or a method in which a chemical is injected from a permeated water side of the membrane is performed.
【０００４】[0004]
【発明が解決しようとする課題】しかし、従来の洗浄方
法では、いずれの方法においても薬液を大量に必要と
し、また、水回収率も低いという問題があった。例え
ば、ろ過槽内に膜モジュールを浸漬したままの状態で膜
の透過水側に薬液を注入するインライン洗浄を行う場合
は、まず、ろ過工程処理終了後の薬液洗浄開始時に、膜
内や配管内に処理水が充満した状態で薬液を注入するの
で、薬液が膜面に到達するまでに配管内及び膜モジュー
ル内に残っている処理水がろ過槽内に戻されることにな
る。However, the conventional cleaning methods have a problem that a large amount of chemical solution is required in any of the methods, and that the water recovery rate is low. For example, when performing in-line cleaning in which a chemical solution is injected into the permeated water side of the membrane while the membrane module is immersed in the filtration tank, first, at the start of chemical solution cleaning after the filtration process, the inside of the membrane or piping Since the chemical is injected in a state where the treatment water is filled, the treated water remaining in the pipe and the membrane module until the chemical reaches the membrane surface is returned to the filtration tank.
【０００５】したがって、この分の処理水が無駄になっ
て処理効率が低下する。さらに、薬液洗浄後にろ過工程
を開始するときには、配管内及び膜モジュール内に残留
した薬液が十分に希釈されるまでの間、膜透過水を前処
理工程に戻す捨水工程等を長時間行う必要があり、この
間は、処理水が発生しないため、ここでも処理効率が低
下することになる。Therefore, the treated water is wasted and the treatment efficiency is reduced. Furthermore, when starting the filtration step after cleaning the chemical, it is necessary to perform a long time such as a drainage step of returning the membrane permeated water to the pretreatment step until the chemical remaining in the piping and the membrane module is sufficiently diluted. During this time, no treated water is generated, so that the treatment efficiency is also reduced.
【０００６】そこで本発明は、少量の薬液で効果的な膜
洗浄を行うことができるとともに、処理効率を向上させ
て水回収率を高めることができる膜モジュールの洗浄方
法及び膜ろ過装置を提供することを目的としている。Accordingly, the present invention provides a membrane module cleaning method and a membrane filtration device capable of performing effective membrane cleaning with a small amount of a chemical solution, and improving the processing efficiency and increasing the water recovery rate. It is intended to be.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するた
め、本発明の膜モジュールの洗浄方法は、浸漬型中空糸
膜モジュールを薬液により洗浄する方法であって、ろ過
工程処理終了時に、膜モジュールの一端から膜内に圧縮
空気を導入して膜内の処理水を膜モジュールの他端から
処理水槽に回収する工程と、該処理水回収工程終了後に
膜モジュールの一端から膜内に薬液を注入する工程と、
該薬液注入工程終了後に膜モジュールの一端から膜内に
圧縮空気を導入して前記薬液を膜外部側に押出す工程
と、該薬液押出工程終了後に膜内に処理水を導入して膜
内を水で満たす処理水導入工程とを含むことを特徴と
し、特に、前記処理水回収工程終了後に、圧縮空気の導
入を継続して圧縮空気を膜外部側に噴出させる空気逆洗
工程を行い、次いで前記薬液注入工程を行うことを特徴
としている。In order to achieve the above object, a method for cleaning a membrane module according to the present invention is a method for cleaning a submerged hollow fiber membrane module with a chemical solution. Introducing compressed air into the membrane from one end of the membrane module to collect the treated water in the membrane from the other end of the membrane module into the treated water tank, and injecting the chemical into the membrane from one end of the membrane module after the end of the treated water collection step The process of
A step of introducing compressed air into the membrane from one end of the membrane module after the chemical solution injection step to extrude the chemical solution to the outside of the membrane, and introducing treated water into the membrane after the chemical solution extrusion step to remove the inside of the membrane. And a treated water introduction step of filling with water, and in particular, after the treated water collection step, performing an air backwashing step of continuing introduction of compressed air and ejecting compressed air to the outside of the membrane, The method is characterized in that the chemical solution injection step is performed.
【０００８】さらに、前記薬液押出工程と処理水導入工
程との間に、膜内に処理水を導入して膜内を水で満たし
た後、膜内に圧縮空気を導入して処理水を膜外部側に押
出す濯ぎ工程を行うことにより、膜内の薬液を確実に膜
外部に排出することができる。Further, between the chemical solution extruding step and the treated water introducing step, treated water is introduced into the membrane to fill the membrane with water, and then compressed air is introduced into the membrane to remove the treated water. By performing the rinsing step of extruding to the outside, the chemical solution in the film can be reliably discharged to the outside of the film.
【０００９】また、本発明の膜ろ過装置は、ろ過槽内の
原水中に中空糸膜モジュールを浸漬してろ過処理を行う
膜ろ過装置において、膜モジュール両端にそれぞれ連通
し、吸引弁を介して吸引ポンプに接続する一対の処理水
吸引経路と、膜モジュールの一端に接続した処理水吸引
経路の前記吸引弁よりも膜側に接続した洗浄経路とを備
えるとともに、該洗浄経路には、空気導入弁を介して接
続した空気圧縮機と、薬液注入弁を介して接続した薬液
注入ポンプと、処理水導入弁を介して接続した逆洗ポン
プとが設けられていることを特徴としている。Further, the membrane filtration device of the present invention is a membrane filtration device in which a hollow fiber membrane module is immersed in raw water in a filtration tank to perform a filtration treatment. A pair of treated water suction paths connected to the suction pump, and a cleaning path connected to the membrane side of the treated water suction path connected to one end of the membrane module than the suction valve, and air introduced into the cleaning path. An air compressor connected via a valve, a chemical injection pump connected via a chemical injection valve, and a backwash pump connected via a treated water introduction valve are provided.
【００１０】[0010]
【発明の実施の形態】図１は、本発明の膜モジュールの
洗浄方法を実施することができる膜ろ過装置の一形態例
を示す系統図である。この膜ろ過装置は、ろ過槽１１
と、該ろ過槽１１内に設置された中空糸膜モジュール１
２と、該中空糸膜モジュール１２の両端にそれぞれ接続
した一対の処理水吸引経路１３ａ，１３ｂ及び両経路１
３ａ，１３ｂにそれぞれ設けられた吸引弁１４ａ，１４
ｂと、該吸引弁１４ａ，１４ｂの下流側で合流した処理
水吸引経路１３を介して処理水（膜透過水）を吸引する
ための吸引ポンプ１５と、吸引ポンプ１５で吸引した処
理水を貯留する処理水槽１６と、一方の処理水吸引経路
１３ｂの前記吸引弁１４ｂよりも膜側に接続した洗浄経
路１７と、該洗浄経路１７に空気導入弁１８を介して接
続した空気圧縮機１９と、洗浄経路１７に薬液注入弁２
０を介して接続した薬液注入ポンプ２１及び薬液貯槽２
２と、処理水導入弁２３を介して接続した逆洗ポンプ２
４とを備えている。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a system diagram showing one embodiment of a membrane filtration device which can carry out the method for cleaning a membrane module of the present invention. This membrane filtration device includes a filtration tank 11
And the hollow fiber membrane module 1 installed in the filtration tank 11.
2, a pair of treated water suction paths 13a, 13b connected to both ends of the hollow fiber membrane module 12, and both paths 1
Suction valves 14a, 14 provided in 3a, 13b, respectively
b, a suction pump 15 for sucking treated water (membrane permeated water) through a treated water suction path 13 that is joined downstream of the suction valves 14a and 14b, and a storage of the treated water sucked by the suction pump 15. A treatment water tank 16, a cleaning path 17 connected to the membrane side of the one treatment water suction path 13 b with respect to the suction valve 14 b, an air compressor 19 connected to the cleaning path 17 via an air introduction valve 18, Chemical solution injection valve 2 in cleaning path 17
Solution injection pump 21 and solution storage tank 2 connected via
2 and a backwash pump 2 connected via a treated water introduction valve 23
4 is provided.
【００１１】まず、ろ過工程では、原水流入経路２５か
らろ過槽１１内に原水を流入させ、前記空気導入弁１
８、薬液注入弁２０及び処理水導入弁２３をそれぞれ
閉、前記吸引弁１４ａ，１４ｂを開とした状態で吸引ポ
ンプ１５が作動することにより、中空糸膜モジュール１
２内の膜透過水を吸引するろ過処理が行われ、膜透過水
（処理水）が処理水吸引経路１３ａ，１３ｂ，１３を通
って処理水槽１６に取出され、処理水流出経路２６から
流出する。First, in the filtration step, the raw water flows into the filtration tank 11 from the raw water inflow path 25, and the air introduction valve 1
8. By operating the suction pump 15 with the chemical solution injection valve 20 and the treated water introduction valve 23 closed and the suction valves 14a and 14b open, the hollow fiber membrane module 1 is opened.
Filtration treatment for sucking the membrane permeated water in 2 is performed, and the membrane permeated water (treated water) is taken out to the treated water tank 16 through the treated water suction paths 13a, 13b, 13 and flows out from the treated water outflow path 26. .
【００１２】膜モジュール１２の薬液洗浄は、次のよう
な手順で行う。まず、吸引ポンプ１５を停止させてろ過
工程を終了した後、洗浄経路１７が接続した処理水吸引
経路１３ｂの吸引弁１４ｂを閉じ、他方の吸引弁１４ａ
を開いたままの状態とし、空気導入弁１８を開いて空気
圧縮機１９を作動させ、処理水回収工程を行う。The chemical cleaning of the membrane module 12 is performed in the following procedure. First, after the suction pump 15 is stopped to complete the filtration step, the suction valve 14b of the treated water suction path 13b to which the washing path 17 is connected is closed, and the other suction valve 14a is closed.
Is kept open, the air introduction valve 18 is opened, the air compressor 19 is operated, and the treated water recovery step is performed.
【００１３】これにより、洗浄経路１７から一方の処理
水吸引経路１３ｂを通して膜モジュール１２の一端に圧
縮空気が導入され、この圧縮空気によって処理水吸引経
路１３ａ等の配管内や膜モジュール内に充満していた処
理水が吸引弁１４ａ、処理水吸引経路１３ａ、処理水吸
引経路１３及び吸引ポンプ１５を通って処理水槽１６に
回収される。As a result, compressed air is introduced from the cleaning path 17 to one end of the membrane module 12 through one of the treated water suction paths 13b, and fills the inside of the piping such as the treated water suction path 13a and the membrane module with the compressed air. The treated water passed through the suction valve 14a, the treated water suction path 13a, the treated water suction path 13 and the suction pump 15 is collected in the treated water tank 16.
【００１４】このとき、吸引ポンプ１５は、その構造に
応じて、適当な速度で作動させておいてもよく、停止さ
せておいてもよい。また、吸引ポンプ１５をバイパスさ
せて処理水を処理水槽１６に回収するようにしてもよ
い。なお、処理水の全量を回収する必要は無い。At this time, the suction pump 15 may be operated at an appropriate speed depending on its structure, or may be stopped. Further, the treated water may be collected in the treated water tank 16 by bypassing the suction pump 15. It is not necessary to collect the entire amount of the treated water.
【００１５】処理水を十分に回収したら、吸引弁１４ａ
を閉じて処理水回収工程を終了する。その後、空気圧縮
機１９の運転を所定時間継続し、膜モジュール１２内に
導入した圧縮空気を膜外部側に噴出させる空気逆洗工程
を行うことにより、膜外面に付着した固形物を剥離させ
る物理的な洗浄を行うことができ、洗浄効果をより高め
ることができる。When the treated water is sufficiently collected, the suction valve 14a
Is closed to end the treated water recovery step. Thereafter, the operation of the air compressor 19 is continued for a predetermined time, and an air backwashing step of jetting the compressed air introduced into the membrane module 12 to the outside of the membrane is performed, thereby removing the solid matter attached to the outer surface of the membrane. Cleaning can be performed, and the cleaning effect can be further enhanced.
【００１６】処理水回収工程終了後、あるいは、必要に
応じて行われる空気逆洗工程終了後、空気導入弁１８を
閉じて空気圧縮機１９を停止させるとともに、薬液注入
弁２０を開いて薬液注入ポンプ２１を作動させ、薬液貯
槽２２内の薬液を膜モジュール１２内に所定量注入する
薬液注入工程を行う。また、薬液貯槽２２内に使用濃度
に比べて高濃度の薬液を貯留しておき、薬液の注入と同
時に処理水導入弁２３を開いて逆洗ポンプ２４を作動さ
せ、処理水を導入して薬液を所定濃度に希釈した状態で
膜モジュール１２内に注入することもできる。このよう
に高濃度の薬液を貯留することにより、薬液貯槽２２の
大幅な小型化を図ることができる。After the end of the treated water recovery step or the end of the air backwashing step performed as required, the air introduction valve 18 is closed to stop the air compressor 19, and the chemical liquid injection valve 20 is opened to inject the chemical liquid. The pump 21 is operated to perform a chemical liquid injection step of injecting a predetermined amount of the chemical liquid in the chemical liquid storage tank 22 into the membrane module 12. Further, a chemical solution having a higher concentration than the used concentration is stored in the chemical solution storage tank 22, and at the same time as the injection of the chemical solution, the treated water introduction valve 23 is opened, the backwash pump 24 is operated, and the treated water is introduced. Can be injected into the membrane module 12 in a state of being diluted to a predetermined concentration. By storing the high-concentration chemical solution in this way, the size of the chemical solution storage tank 22 can be significantly reduced.
【００１７】この薬液注入工程において、前工程終了時
に膜モジュール１２内等に存在していた空気は、注入さ
れた薬液によって膜外部側に押出される。また、一部の
薬液を注入圧力によって膜外部側に押出すことにより、
膜内部側だけでなく膜外部側の薬液洗浄も同時に行うこ
とができる。In the chemical solution injection step, air existing in the membrane module 12 or the like at the end of the previous step is pushed out of the membrane by the injected chemical solution. In addition, by extruding some chemicals to the outside of the membrane by injection pressure,
The chemical cleaning not only on the inner side of the membrane but also on the outer side of the membrane can be performed simultaneously.
【００１８】所定量の薬液を注入したら、薬液注入ポン
プ２１を停止させて薬液注入弁２０を閉じ、薬液注入工
程を終了した後、空気導入弁１８を開いて空気圧縮機１
９を作動させ、圧縮空気により膜モジュール１２内の薬
液を膜外部側に押出す薬液押出工程を行う。この薬液押
出工程を行うことにより、膜に付着した有機物や金属、
生物スライム等を除去する薬液洗浄を行うことができ
る。After injecting a predetermined amount of the chemical, the chemical injection pump 21 is stopped to close the chemical injection valve 20, and after the chemical injection step is completed, the air introduction valve 18 is opened to open the air compressor 1
9 is operated to perform a chemical liquid extruding step of extruding the chemical liquid in the membrane module 12 to the outside of the membrane with the compressed air. By performing this chemical solution extrusion process, organic substances and metals attached to the film,
Chemical cleaning for removing biological slime and the like can be performed.
【００１９】なお、前記薬液注入工程及び薬液押出工程
は、必要に応じて複数回繰返して行うこともでき、異な
る薬液を使用して同じ工程を繰返すこともできる。ま
た、前記薬液押出工程終了後、必要に応じて前記同様の
空気逆洗工程を行い、圧縮空気を膜外部側に噴出させる
ことにより、薬液洗浄によって除去された付着物をより
確実に膜面から排除することができる。The above-mentioned chemical liquid injection step and chemical liquid extrusion step can be repeated a plurality of times as necessary, and the same steps can be repeated using different chemical liquids. In addition, after the chemical solution extrusion step, if necessary, the same air backwashing step is performed as described above, and compressed air is ejected to the outside of the film, so that the adhered matter removed by the chemical solution washing can be more reliably removed from the film surface. Can be eliminated.
【００２０】薬液押出工程あるいは必要に応じて行われ
る空気逆洗工程を終了した後、空気導入弁１８を閉じて
空気圧縮機１９を停止させるとともに、処理水導入弁２
３及び吸引弁１４ａを開いて逆洗ポンプ２４を作動さ
せ、処理水槽１６内の処理水を膜モジュール１２内に導
入し、膜モジュール１２内や処理水吸引経路１３ａ，１
３ｂ，１３等の配管内を水で満たす処理水導入工程を行
う。After completion of the chemical solution extrusion step or the air backwashing step performed as required, the air introduction valve 18 is closed to stop the air compressor 19, and the treated water introduction valve 2 is closed.
3 and the suction valve 14a are opened, the backwash pump 24 is operated, and the treated water in the treated water tank 16 is introduced into the membrane module 12, and the inside of the membrane module 12 and the treated water suction paths 13a, 1
A process water introduction step of filling the inside of the pipes such as 3b and 13 with water is performed.
【００２１】このとき、吸引弁１４ａを閉じた状態で膜
モジュール１２内への処理水の導入を行い、次いで、前
記薬液押出工程と同様にして圧縮空気で膜モジュール１
２内の水を膜外部側に押出す濯ぎ工程を必要に応じて行
うことにより、膜モジュール１２内の薬液をより確実に
膜モジュール１２内から排除することができる。At this time, treated water is introduced into the membrane module 12 with the suction valve 14a closed, and then the membrane module 1 is compressed with compressed air in the same manner as in the chemical solution extrusion step.
By performing a rinsing step of extruding the water in the membrane 2 to the outside of the membrane as needed, the chemical solution in the membrane module 12 can be more reliably removed from the inside of the membrane module 12.
【００２２】前記処理水導入工程は、膜モジュール１２
内等が水で満たされ、吸引ポンプ１５による膜透過水の
吸引を問題なく行えるようになるまで行われ、その後、
処理水導入弁２３及び逆洗ポンプ２４を停止させて両吸
引弁１４ａ，１４ｂを開き、吸引ポンプ１５を作動させ
ることにより、ろ過工程が再開する。The process water introduction step is performed in the membrane module 12
It is performed until the inside is filled with water and the suction of the membrane permeated water by the suction pump 15 can be performed without any problem.
By stopping the treated water introduction valve 23 and the backwash pump 24, opening both the suction valves 14a and 14b, and operating the suction pump 15, the filtration process is restarted.
【００２３】このように、膜モジュール１２の薬液洗浄
を行うにあたり、ろ過工程終了時に膜モジュール１２内
等に存在する膜透過水を圧縮空気で押出して回収するこ
とにより、水回収率を高めることができる。また、膜透
過水を排除してから膜モジュール１２内に薬液を注入す
るので、膜透過水によって希釈されることがなく、所定
濃度の薬液を膜モジュール１２内に速やかに注入するこ
とができる。さらに、薬液を圧縮空気によって膜外部側
に押出すようにしており、薬液を膜外部側に押出すため
に薬液の注入を継続する必要がないので、従来に比べて
少量の薬液によって効果的に膜モジュール１２の薬液洗
浄を行うことができる。As described above, when the chemical cleaning of the membrane module 12 is performed, the water recovery rate can be increased by extruding and collecting the membrane permeated water present in the membrane module 12 or the like at the end of the filtration step with compressed air. it can. In addition, since the chemical solution is injected into the membrane module 12 after removing the membrane water, the chemical solution having a predetermined concentration can be quickly injected into the membrane module 12 without being diluted by the membrane water. Furthermore, the chemical solution is extruded to the outside of the membrane by compressed air, and there is no need to continue the injection of the chemical solution in order to extrude the chemical solution to the outside of the membrane. The chemical cleaning of the membrane module 12 can be performed.
【００２４】しかも、薬液を圧縮空気で押出すことによ
って膜モジュール１２内等に残留する薬液量を少なくす
ることができるので、処理水の導入によって薬液を十分
に希釈することが可能であり、処理水導入工程を終えた
後、捨水工程を行うことなくろ過工程を再開することも
でき、捨水による膜透過水のロスや捨水工程の時間的ロ
スを解消して水回収率を大幅に高めることができる。Furthermore, since the amount of the chemical remaining in the membrane module 12 or the like can be reduced by extruding the chemical with compressed air, it is possible to sufficiently dilute the chemical by introducing the treated water. After the water introduction process is completed, the filtration process can be restarted without performing the water disposal process, eliminating the loss of membrane permeated water due to water disposal and the time loss of the water disposal process, greatly increasing the water recovery rate. Can be enhanced.
【００２５】なお、ろ過工程開始時には、処理水の水質
により、必要に応じて捨水工程を行うようにしてもよ
い。また、薬液洗浄操作中、膜モジュール１２からろ過
槽１１内に放出された固形物や薬液等は、原水と共に濃
縮水排出経路２７を通ってろ過槽１１から抜出され、所
定の処理が行われる。At the start of the filtration step, a drainage step may be performed as necessary, depending on the quality of the treated water. During the chemical cleaning operation, solids, chemicals, and the like discharged from the membrane module 12 into the filtration tank 11 are extracted from the filtration tank 11 through the concentrated water discharge path 27 together with the raw water, and are subjected to predetermined processing. .
【００２６】本形態例では、中空糸膜を鉛直方向に配置
した膜モジュール１２の下端部に接続する処理水吸引経
路１３ｂに洗浄経路１７を接続しているが、上部側の処
理水吸引経路１３ａに接続してもよく、洗浄経路１７を
分岐して弁を介して両処理水吸引経路１３ａ，１３ｂに
それぞれ接続し、弁を適当に開閉して上記各工程を行う
ようにしてもよい。さらに、他方の吸引弁１４ａは、処
理水吸引経路１３に設けてもよい。また、中空糸膜モジ
ュール１２の構造や膜ろ過装置の構成は任意であり、従
来からの各種構造、構成を採用することができる。In this embodiment, the washing path 17 is connected to the treated water suction path 13b which connects the lower end of the membrane module 12 in which the hollow fiber membranes are arranged vertically, but the treated water suction path 13a on the upper side. Alternatively, the cleaning path 17 may be branched and connected to both the treated water suction paths 13a and 13b via valves, and the above steps may be performed by appropriately opening and closing the valve. Further, the other suction valve 14a may be provided in the treated water suction path 13. The structure of the hollow fiber membrane module 12 and the structure of the membrane filtration device are arbitrary, and various conventional structures and structures can be employed.
【００２７】[0027]
【発明の効果】以上説明したように、本発明によれば、
圧縮空気の導入によって膜透過水の回収や薬液の膜外部
側への押出しを行うようにしたので、水回収率を向上で
きるとともに、薬液の使用量も低減することができ、ろ
過処理効率を大幅に向上させることができる。As described above, according to the present invention,
Compressed air is introduced to recover the permeated water and extrude the chemical solution to the outside of the membrane, which can improve the water recovery rate, reduce the amount of chemical solution used, and greatly increase the filtration efficiency. Can be improved.
【図１】 本発明の膜ろ過装置の一形態例を示す系統図
である。FIG. 1 is a system diagram showing one embodiment of a membrane filtration device of the present invention.
１１…ろ過槽、１２…中空糸膜モジュール、１３，１３
ａ，１３ｂ…処理水吸引経路、１４ａ，１４ｂ…吸引
弁、１５…吸引ポンプ、１６…処理水槽、１７…洗浄経
路、１８…空気導入弁、１９…空気圧縮機、２０…薬液
注入弁、２１…薬液注入ポンプ、２２…薬液貯槽、２３
…処理水導入弁、２４…逆洗ポンプ、２５…原水流入経
路、２６…処理水流出経路、２７…濃縮水排出経路11 ... filtration tank, 12 ... hollow fiber membrane module, 13, 13
a, 13b: treated water suction path, 14a, 14b: suction valve, 15: suction pump, 16: treated water tank, 17: cleaning path, 18: air introduction valve, 19: air compressor, 20: chemical liquid injection valve, 21 ... Chemical liquid injection pump, 22 ... Chemical liquid storage tank, 23
... treated water introduction valve, 24 ... backwash pump, 25 ... raw water inflow path, 26 ... treated water outflow path, 27 ... concentrated water discharge path
フロントページの続き Ｆターム(参考） 4D006 GA02 HA02 HA12 HA19 HA93 HA95 JA31A JA39A JA53A JA55A JA63A JA67A JA70A JA71 KC03 KC14 KC16 MA01 PA01 PB02 PB08Continued on the front page F term (reference) 4D006 GA02 HA02 HA12 HA19 HA93 HA95 JA31A JA39A JA53A JA55A JA63A JA67A JA70A JA71 KC03 KC14 KC16 MA01 PA01 PB02 PB08
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000381763AJP4382275B2 (en) | 2000-12-15 | 2000-12-15 | Membrane module cleaning method |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000381763AJP4382275B2 (en) | 2000-12-15 | 2000-12-15 | Membrane module cleaning method |
| Publication Number | Publication Date |
|---|---|
| JP2002177746Atrue JP2002177746A (en) | 2002-06-25 |
| JP4382275B2 JP4382275B2 (en) | 2009-12-09 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000381763AExpired - Fee RelatedJP4382275B2 (en) | 2000-12-15 | 2000-12-15 | Membrane module cleaning method |
| Country | Link |
|---|---|
| JP (1) | JP4382275B2 (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006305443A (en)* | 2005-04-27 | 2006-11-09 | Maezawa Ind Inc | Filtration device |
| JP2007505728A (en)* | 2003-09-22 | 2007-03-15 | ユー・エス・フィルター・ウェイストウォーター・グループ・インコーポレイテッド | Backwashing and cleaning methods |
| JP2008525165A (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 | Cleaning membrane filtration systems |
| 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 |
| 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 |
| US8506806B2 (en) | 2004-09-14 | 2013-08-13 | Siemens Industry, Inc. | Methods and apparatus for removing solids from a membrane module |
| US8512568B2 (en) | 2001-08-09 | 2013-08-20 | Siemens Industry, Inc. | Method of cleaning membrane modules |
| US8518256B2 (en) | 2001-04-04 | 2013-08-27 | Siemens Industry, Inc. | Membrane module |
| KR101402201B1 (en) | 2011-12-23 | 2014-05-30 | (주)필로스 | Back washing apparatus of membrane |
| 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 |
| US8758622B2 (en) | 2004-12-24 | 2014-06-24 | Evoqua Water Technologies Llc | Simple gas scouring method and apparatus |
| US8790515B2 (en) | 2004-09-07 | 2014-07-29 | Evoqua Water Technologies Llc | Reduction of backwash liquid waste |
| US8808540B2 (en) | 2003-11-14 | 2014-08-19 | Evoqua Water Technologies Llc | Module cleaning method |
| JP2014188414A (en)* | 2013-03-26 | 2014-10-06 | Kubota Corp | Water treatment method and system |
| 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 |
| CN104524844A (en)* | 2014-12-31 | 2015-04-22 | 上海市安装工程集团有限公司 | Method for cleaning filter tank |
| US9022224B2 (en) | 2010-09-24 | 2015-05-05 | Evoqua Water Technologies Llc | Fluid control manifold for membrane filtration system |
| WO2016117081A1 (en)* | 2015-01-22 | 2016-07-28 | 株式会社クボタ | Method for cleaning tubular filtration membrane |
| WO2016117082A1 (en)* | 2015-01-22 | 2016-07-28 | 株式会社クボタ | Water purification 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 |
| US9764288B2 (en) | 2007-04-04 | 2017-09-19 | Evoqua Water Technologies Llc | Membrane module protection |
| US9764289B2 (en) | 2012-09-26 | 2017-09-19 | Evoqua Water Technologies Llc | Membrane securement device |
| US9815027B2 (en) | 2012-09-27 | 2017-11-14 | Evoqua Water Technologies Llc | Gas scouring apparatus for immersed membranes |
| 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 |
| CN117046313A (en)* | 2023-09-19 | 2023-11-14 | 北京美能环保科技有限公司 | Device and method for cleaning ultrafiltration or microfiltration membrane |
| JP7498046B2 (en) | 2020-07-13 | 2024-06-11 | オルガノ株式会社 | Filtration device for oil-containing wastewater and method for cleaning filtration membrane for oil-containing wastewater |
| JP7598736B2 (en) | 2020-11-11 | 2024-12-12 | 前澤工業株式会社 | Water treatment device and cleaning method for water treatment device |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101957304A (en)* | 2010-09-30 | 2011-01-26 | 北京碧水源科技股份有限公司 | Measuring device of clear water flux of hollow-fiber membrane and method for measuring clear water flux of hollow-fiber membrane by using measuring device |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04225805A (en)* | 1990-12-26 | 1992-08-14 | Ebara Infilco Co Ltd | Method for solid-liquid separation and apparatus therefor |
| JPH08229362A (en)* | 1995-02-27 | 1996-09-10 | Genzo Ozawa | Membrane cleaning method and membrane cleaning apparatus for immersion type membrane filtration apparatus |
| JPH11114384A (en)* | 1997-10-16 | 1999-04-27 | Mitsubishi Rayon Co Ltd | Cleaning method for hollow fiber membrane module |
| JPH11207332A (en)* | 1998-01-28 | 1999-08-03 | Maezawa Ind Inc | Siphon suction type immersion type membrane filtration device |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04225805A (en)* | 1990-12-26 | 1992-08-14 | Ebara Infilco Co Ltd | Method for solid-liquid separation and apparatus therefor |
| JPH08229362A (en)* | 1995-02-27 | 1996-09-10 | Genzo Ozawa | Membrane cleaning method and membrane cleaning apparatus for immersion type membrane filtration apparatus |
| JPH11114384A (en)* | 1997-10-16 | 1999-04-27 | Mitsubishi Rayon Co Ltd | Cleaning method for hollow fiber membrane module |
| JPH11207332A (en)* | 1998-01-28 | 1999-08-03 | Maezawa Ind Inc | Siphon suction type immersion type membrane filtration device |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8518256B2 (en) | 2001-04-04 | 2013-08-27 | Siemens Industry, Inc. | Membrane module |
| US8512568B2 (en) | 2001-08-09 | 2013-08-20 | Siemens Industry, Inc. | Method of cleaning membrane modules |
| 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 |
| JP2007505728A (en)* | 2003-09-22 | 2007-03-15 | ユー・エス・フィルター・ウェイストウォーター・グループ・インコーポレイテッド | Backwashing and cleaning methods |
| KR101141514B1 (en) | 2003-09-22 | 2012-05-08 | 지멘스 인더스트리, 인크. | Backwash and cleaning method |
| US8808540B2 (en) | 2003-11-14 | 2014-08-19 | Evoqua Water Technologies Llc | Module cleaning method |
| 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 |
| US8790515B2 (en) | 2004-09-07 | 2014-07-29 | Evoqua Water Technologies Llc | Reduction of backwash liquid waste |
| US8506806B2 (en) | 2004-09-14 | 2013-08-13 | Siemens Industry, Inc. | Methods and apparatus for removing solids from a membrane module |
| US8377305B2 (en) | 2004-09-15 | 2013-02-19 | Siemens Industry, Inc. | Continuously variable aeration |
| US8496828B2 (en) | 2004-12-24 | 2013-07-30 | Siemens Industry, Inc. | Cleaning in membrane filtration systems |
| JP4763718B2 (en)* | 2004-12-24 | 2011-08-31 | 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 | Cleaning membrane filtration systems |
| JP2008525165A (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 | Cleaning membrane filtration systems |
| US8758622B2 (en) | 2004-12-24 | 2014-06-24 | Evoqua Water Technologies Llc | Simple gas scouring method and apparatus |
| JP2006305443A (en)* | 2005-04-27 | 2006-11-09 | Maezawa Ind Inc | Filtration device |
| US9675938B2 (en) | 2005-04-29 | 2017-06-13 | Evoqua Water Technologies Llc | Chemical clean for membrane filter |
| 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 |
| US8858796B2 (en) | 2005-08-22 | 2014-10-14 | Evoqua Water Technologies Llc | Assembly for water filtration using a tube manifold to minimise backwash |
| US8293098B2 (en) | 2006-10-24 | 2012-10-23 | Siemens Industry, Inc. | Infiltration/inflow control for membrane bioreactor |
| US8623202B2 (en) | 2007-04-02 | 2014-01-07 | Siemens Water Technologies Llc | Infiltration/inflow control for membrane bioreactor |
| 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 |
| US8622222B2 (en) | 2007-05-29 | 2014-01-07 | Siemens Water Technologies Llc | 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 |
| US8372276B2 (en) | 2007-05-29 | 2013-02-12 | Siemens Industry, Inc. | Membrane cleaning with pulsed airlift pump |
| US9206057B2 (en) | 2007-05-29 | 2015-12-08 | Evoqua Water Technologies Llc | Membrane cleaning with pulsed airlift pump |
| US8287743B2 (en) | 2007-05-29 | 2012-10-16 | Siemens Industry, Inc. | Membrane cleaning with pulsed airlift pump |
| US9573824B2 (en) | 2007-05-29 | 2017-02-21 | Evoqua Water Technologies Llc | Membrane cleaning with pulsed airlift pump |
| US8382981B2 (en) | 2008-07-24 | 2013-02-26 | Siemens Industry, Inc. | Frame system for membrane filtration modules |
| US9023206B2 (en) | 2008-07-24 | 2015-05-05 | Evoqua Water Technologies Llc | 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 |
| US11065569B2 (en) | 2011-09-30 | 2021-07-20 | Rohm And Haas Electronic Materials Singapore Pte. Ltd. | Manifold arrangement |
| US9604166B2 (en) | 2011-09-30 | 2017-03-28 | Evoqua Water Technologies Llc | Manifold arrangement |
| 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 |
| KR101402201B1 (en) | 2011-12-23 | 2014-05-30 | (주)필로스 | Back washing apparatus of membrane |
| US9533261B2 (en) | 2012-06-28 | 2017-01-03 | Evoqua Water Technologies Llc | Potting method |
| US9962865B2 (en) | 2012-09-26 | 2018-05-08 | Evoqua Water Technologies Llc | Membrane potting methods |
| US9764289B2 (en) | 2012-09-26 | 2017-09-19 | Evoqua Water Technologies Llc | Membrane securement device |
| US9815027B2 (en) | 2012-09-27 | 2017-11-14 | Evoqua Water Technologies Llc | Gas scouring apparatus for immersed membranes |
| JP2014188414A (en)* | 2013-03-26 | 2014-10-06 | Kubota Corp | Water treatment method and system |
| US11173453B2 (en) | 2013-10-02 | 2021-11-16 | Rohm And Haas Electronic Materials Singapores | Method and device for repairing a membrane filtration module |
| US10427102B2 (en) | 2013-10-02 | 2019-10-01 | Evoqua Water Technologies Llc | Method and device for repairing a membrane filtration module |
| CN104524844A (en)* | 2014-12-31 | 2015-04-22 | 上海市安装工程集团有限公司 | Method for cleaning filter tank |
| WO2016117082A1 (en)* | 2015-01-22 | 2016-07-28 | 株式会社クボタ | Water purification system |
| WO2016117081A1 (en)* | 2015-01-22 | 2016-07-28 | 株式会社クボタ | Method for cleaning tubular filtration membrane |
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| CN117046313A (en)* | 2023-09-19 | 2023-11-14 | 北京美能环保科技有限公司 | Device and method for cleaning ultrafiltration or microfiltration membrane |
| WO2025060290A1 (en)* | 2023-09-19 | 2025-03-27 | 北京美能环保科技有限公司 | Ultrafiltration or microfiltration membrane cleaning device and cleaning method |
| Publication number | Publication date |
|---|---|
| JP4382275B2 (en) | 2009-12-09 |
| Publication | Publication Date | Title |
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