JP2000051669A - Hollow fiber membrane module fitted with lower cap - Google Patents

Hollow fiber membrane module fitted with lower cap

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Publication number
JP2000051669A
JP2000051669A JP10221305A JP22130598A JP2000051669A JP 2000051669 A JP2000051669 A JP 2000051669A JP 10221305 A JP10221305 A JP 10221305A JP 22130598 A JP22130598 A JP 22130598A JP 2000051669 A JP2000051669 A JP 2000051669A
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Japan
Prior art keywords
hollow fiber
fiber membrane
membrane module
water
air
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JP10221305A
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Japanese (ja)
Inventor
Kentaro Hirabayashi
Kyoichi Okubo
Yoshihiro Shiozawa
義博 塩沢
享一 大久保
健太郎 平林
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Hitachi Eng Co Ltd
Hitachi Ltd
日立エンジニアリング株式会社
株式会社日立製作所
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Application filed by Hitachi Eng Co Ltd, Hitachi Ltd, 日立エンジニアリング株式会社, 株式会社日立製作所 filed Critical Hitachi Eng Co Ltd
Priority to JP10221305A priority Critical patent/JP2000051669A/en
Publication of JP2000051669A publication Critical patent/JP2000051669A/en
Application status is Pending legal-status Critical

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Abstract

PROBLEM TO BE SOLVED: To enhance filtering treatment by a hollow fiber membrane module and low pressure air backwashing properties. SOLUTION: In order to enhance filtering treatment by a hollow fiber membrane module and low pressure air backwashing properties removing the suspended matter collected and accumulated on the outer surfaces of hollow fiber membrane by low pressure air backwashing, a cap 55 is provided to the lower end member 31' of the outer cylinder 51 for inserting the hollow fiber membrane module and a plurality of water collecting holes 56 for supplying water and introducing water or air at a time of backwashing are provided to the end surface of the cap 55.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明は、原液のろ過処理を行う容器内に複数個の中空糸膜モジュールを備える中空糸膜式ろ過装置に係り、特に、中空糸膜モジュール挿入用外筒の下端にキャップを設け、そのキャップの端面に給水用及び逆洗時の水または空気を導入する集水穴を複数個備えた中空糸膜モジュールに関する。 BACKGROUND OF THE INVENTION The present invention relates to a hollow fiber membrane filtration device comprising a plurality of hollow fiber membrane module in the vessel to perform the filtration treatment of the stock solution, in particular, the lower end of the hollow fiber membrane module for insertion outer tube the cap provided, relates to a hollow fiber membrane module provided with a plurality of water collecting hole for introducing water or air at the time of water supply and backwash on the end face of the cap.

【0002】 [0002]

【従来の技術】原子力発電プラントで復水や放射性廃液に存在する鉄錆などを主成分とする懸濁物を分離除去するために用いられるろ過装置として、従来は、粉末イオン交換樹脂等のろ過助材を繊維状または、ステンレス金網状エレメントにプリコートし、ろ過助材プリコート層で懸濁物を分離除去するプリコート式ろ過装置が採用されていたが、近年のプラントでは、ろ過助材を使用しない中空糸膜式ろ過装置が採用されるようになってきた。 As a filtration apparatus for use BACKGROUND OF THE INVENTION suspension consisting mainly of such iron rust which is present in the condensate and radioactive waste at nuclear power plants in order to separate off, conventionally, filtration such as powdered ion-exchange resin the aids fibrous or precoated stainless wire mesh like element, although precoating type filtration apparatus for separating and removing the suspension by filtration aids precoat layer has been adopted, in recent years the plant, does not use the filter aid material the hollow fiber membrane filtration system has come to be employed.
中空糸膜式ろ過装置は、ろ過助材を使用しないため、プリコート式ろ過装置で発生した廃液中に含まれるろ過助材が不要で、廃棄物発生量が少なくなる。 The hollow fiber membrane filtration system does not use a filter aid material, it requires no filter aid material contained in the waste generated by the precoat type filter apparatus, the amount of waste generated is reduced. また、中空糸膜の孔でろ過処理するため、原液の性状により、孔径が選定でき、除去性能がすぐれていることから、各種の懸濁物を除去するための水処理装置に広く用いられている。 Further, since the filtering process with the hole of the hollow fiber membrane, the properties of the stock solution, the pore size can be selected, since the removing performance is excellent, widely used in water treatment apparatus for removing various suspension there.

【0003】図5は、中空糸膜式ろ過装置のろ過器廻りの概略構成を示すものである。 [0003] Figure 5 schematically shows the structure of a filter around the hollow fiber membrane filtration system. 中空糸膜モジュール5 The hollow fiber membrane module 5
は、胴容器1と蓋容器2で挟まれた仕切板3に1個または複数個吊り下げられ、押え板4にて固定されている。 It is suspended one or more partition plate 3 sandwiched between the cylinder container 1 and the lid container 2, and is fixed by the pressing plate 4.

【0004】ろ過処理の必要な原液は、原液入口弁1 [0004] The required stock of the filtration process, the stock solution inlet valve 1
1,原液入口管12を介して胴容器1に導かれ中空糸膜モジュール5の中空糸膜モジュール内に束ねられている中空糸膜でろ過処理され、蓋容器2に集められ、処理液出口管13,処理液出口弁14をへて下流系統に送られる。 1, is filtration hollow fiber membrane are bundled hollow fiber membrane module of the stock solution inlet pipe 12 via the guided to the cylinder chamber 1 hollow fiber membrane module 5, is collected in the lid container 2, the treatment liquid outlet pipe 13, are sent to the downstream system by fart the processing liquid outlet valve 14. このろ過で分離された懸濁物は中空糸膜の外表面に捕捉蓄積され、これにより中空糸膜に開いた細孔が徐々に塞がれ、これに従い中空糸膜のろ過抵抗が増大し、ろ過差圧が上昇する。 The separated suspension in this filtration is captured accumulated on the outer surface of the hollow fiber membrane, thereby the open pores in the hollow fiber membrane is gradually blocked, which in accordance with the filtration resistance of the hollow fiber membrane increases, filtration differential pressure rises. このろ過差圧が規定値に達すると中空糸膜の逆洗を行う。 Performing backwashing of the hollow fiber membrane when the filtration pressure difference reaches a predetermined value.

【0005】中空糸膜の逆洗は、下部空気入口弁15, [0005] backwashing of the hollow fiber membrane, the lower air inlet valve 15,
下部空気入口管16より供給される低圧空気により、中空糸膜を振動させて懸濁物を除去する低圧空気逆洗と、 The low pressure air supplied from the lower air inlet pipe 16, a low pressure air backwash to remove suspension hollow fiber membrane to vibrate,
上部空気入口弁19,上部空気入口管20より供給される高圧空気により蓋容器2内に保有する処理液を圧送し、中空糸膜内側から外側に逆洗する高圧空気逆洗があり、これら一方または両方の組合せにより、中空糸膜で捕捉された懸濁物を除去する。 Upper air inlet valve 19, a treatment liquid held in the lid container 2 is pumped by a high-pressure air supplied from the upper air inlet tube 20, there is high pressure air backwash to backwashing outwardly from the hollow fiber membrane inside, these one or by a combination of both, to remove the trapped suspension with a hollow fiber membrane. この逆洗に使用された空気は、ベント管17,ベント弁18を介して排気され、 The backwash air used is a vent pipe 17 is exhausted through the vent valve 18,
また、懸濁物を含んだ胴容器1内の保有液は、ドレン管21,ドレン弁22を介して排出される。 The holding liquid in the cylinder vessel 1 containing the suspension, drain pipe 21, and is discharged through the drain valve 22.

【0006】図3は、原液のろ過処理を行う中空糸膜モジュール5の従来の構造例を示す。 [0006] Figure 3 shows a conventional structure of the hollow fiber membrane module 5 which performs filtering processing of the stock solution. 中空糸膜モジュール5は、直線状に微孔を形成した中空糸膜40を多数配置し、端部材31に接着固定している。 The hollow fiber membrane module 5, and arranging a large number of hollow fiber membranes 40 forming a microporous linearly, is adhered and fixed to the end member 31. この中空糸膜モジュール5の最上端部の端部材31は、仕切板3と結合するよう幅広の端部を形成しており、端部材31と仕切板3との間にシール材32を設け原液と処理液が混合しないようにし、押え板4で固定されている。 End members 31 of the uppermost end of the hollow fiber membrane module 5 has a wide end to couple the partition plate 3, a sealing member 32 provided stock between the end member 31 and the partition plate 3 processing solution to prevent mixing, and is fixed by the pressing plate 4 and.

【0007】懸濁物を含んだ原液は、中空糸膜モジュール挿入用外筒51の下端に設けられているスカート57 [0007] stock solution containing the suspension, the skirt 57 is provided at the lower end of the hollow fiber membrane module for insertion outer tube 51
によって形成されている開口部から下部端部材31′の案内管54へ導かれ、中空糸膜40へ供給され、中空糸膜40の外側より内側に流れることによりろ過処理される。 Is led to the guide tube 54 of the lower end member 31 'from the opening formed by, is fed to the hollow fiber membrane 40, is filtration by flowing from outside of the hollow fiber membrane 40 on the inside.

【0008】中空糸膜モジュール挿入用外筒51に設けられたスカート57は、原液を中空糸膜モジュール5に供給するため、開口状態としている。 [0008] skirt 57 provided in the hollow fiber membrane module for insertion outer tube 51 for supplying stock to the hollow fiber membrane module 5, and the opening state. ここで、スカート57内に供給される時の原液の水圧は、抵抗作用による影響を受けずに、中空糸膜40の糸が接着固定している下部端部材31′の端面に直接作用される。 Here, pressure of the stock solution when it is fed into the skirt 57, without being affected by the resistance action, the yarn of the hollow fiber membrane 40 is directly acts on the end face of the lower end member 31 'that adheres and fixes .

【0009】これにより、スカート57によって形成された開口部に供給される原液の流量が多くなるに伴い、 [0009] Thus, with the flow rate of the undiluted solution that is supplied to the opening formed by the skirt 57 is increased,
水流速も速くなり、さらに、供給される時の原液の水圧も大きくなる。 Water flow rate becomes faster, further, the water pressure of the stock when it is supplied is also increased.

【0010】すなわち、下部端部材31′の端面に付加される水圧値が中空糸膜40の糸を接着固定するために使用している接着剤の許容値範囲を超えた場合は、中空糸膜40の糸が接着剤から剥離する可能性を有している。 [0010] That is, if it exceeds the allowable value range of adhesives are used to water pressure value to be added to the end face of the lower end member 31 'is bonded and fixed to the thread of the hollow fiber membrane 40, the hollow fiber membranes 40 yarn has the potential to peel from the adhesive.

【0011】従って、ろ過処理時に供給される原液の流量が多くなるに従い、下部端部材31′の端面に作用される水圧値も大きくなることから、中空糸膜40の糸が接着剤から剥離することを防止するため、接着剤量を多くして、下部端部材31′の強化を図る必要を有している。 Accordingly, in accordance with the flow rate of the undiluted solution that is supplied to the filtration process is increased, the water pressure values ​​acting on the end face of the lower end member 31 'to also increase yarn of the hollow fiber membrane 40 is peeled from the adhesive to prevent that, by increasing the amount of adhesive, and has a need to strengthen the lower end member 31 '.

【0012】次に、この中空糸膜モジュール5の逆洗について説明する。 [0012] Next, a description will be given backwash of the hollow fiber membrane module 5. 低圧空気逆洗における低圧空気は、ろ過処理時と同様に中空糸膜モジュール挿入用外筒51の下端に設けられているスカート57によって形成されている開口部から下部端部材31′の案内管54へ導かれ、中空糸膜モジュール5内に供給され、中空糸膜を振動させて懸濁物を除去する逆洗を行っている。 The low pressure air in the low-pressure air backwash, the guide tube 54 of the lower end member 31 'from the opening formed by the skirt 57 is provided at the lower end of the same as the filtration process the hollow fiber membrane module for insertion outer tube 51 is led to, is supplied to the hollow fiber membrane module 5, it is performed backwash to remove suspension hollow fiber membrane to vibrate.

【0013】ここで、中空糸膜モジュール挿入用外筒5 [0013] Here, the hollow fiber membrane module for insertion outer tube 5
1に設けられたスカート57は、低圧空気を中空糸膜モジュール5に供給するため、開口状態としている。 Skirt 57 provided to 1, for supplying low pressure air to the hollow fiber membrane module 5, and the opening state. ここで、スカート57内に供給される低圧空気中で、特にスカート57近傍付近に供給される低圧空気においては、 Here, a low pressure in the air supplied into the skirt 57, in the low-pressure air to be particularly provided in the vicinity of the vicinity of the skirt 57,
供給される部分が開口状態であるため、スカート57の外側に流出してしまうことから、下部端部材31′の端面に供給される低圧空気量は、端面の部位の違いにより、変動する可能性を有している。 Since the portion to be supplied is opened state, since the flow out to the outside of the skirt 57, the low pressure air amount supplied to the end face of the lower end member 31 ', due to differences in the site of the end face, may vary have.

【0014】これにより、スカート57内に供給される低圧空気量は、下部端部材31′の端面の部位によって変動することから、水と低圧空気の境界面で波立ちが発生し、低圧空気逆洗時に必要となる空気量を中空糸膜モジュール5に供給できなくなる可能性を有している。 [0014] Thus, low pressure air amount supplied into the skirt 57, since it varies depending on the site of the end face of the lower end member 31 ', waving occurs at the interface between the water and the low pressure air, low pressure air backwash and the sometimes necessary to become air amount have the potential can not be supplied to the hollow fiber membrane module 5.

【0015】すなわち、低圧空気逆洗時において、中空糸膜40に供給される空気量が少ないことから、空気が中空糸膜と充分に接しない。 [0015] That is, at the time of low pressure air backwashing, since the amount of air supplied to the hollow fiber membrane 40 is small, is not in contact with the hollow fiber membrane and sufficient air. つまり、膜をゆらさないため、空気が中空糸膜モジュール全体に均一に分散されず、中空糸膜全体に伝わらないことから、空気が膜に接する時間が少ない部位において中空糸膜の微孔に捕捉された懸濁物を完全に除去することができず、一部が残存する可能性を有している。 That acquisition, since no shaken the film, air is not uniformly distributed throughout the hollow fiber membrane module, since it not transmitted to the entire hollow fiber membrane, the microporous hollow fiber membranes at the site less time that air is in contact with the membrane can not be completely removed by suspension, it has a possibility that a part is left.

【0016】そのため低圧空気逆洗を実施した直後のろ過器差圧は中空糸膜をろ過に供した当初のろ過差圧まで回復せず、当初のろ過差圧より高くなり、また、その後再びろ過処理に供した時のろ過差圧もその分だけ増加する。 [0016] Therefore the filter differential pressure immediately after implementing the low-pressure air backwash not restored to the initial filtration pressure difference was subjected hollow fiber membrane filtration, higher than the initial filtration pressure difference, also, then filtered again filtration pressure difference when subjected to treatment also increases correspondingly. このろ過処理と逆洗の繰り返しにより、逆洗により除去されずに中空糸膜の外表面に残存する懸濁物は徐々に増加することからろ過差圧上昇時間も早くなることから、逆洗間隔が短くなるとともに、逆洗によるろ過差圧の回復が実質的になくなって、許容差圧となり、それ以上の中空糸膜の使用が不可能となる。 By repeating the filtering process and backwash, suspension remaining on the outer surface of the hollow fiber membrane without being removed by the backwash from becoming faster filtration differential pressure rise time since the gradual increase, backwashing interval together it is shortened, the recovery of the filtration differential pressure by backwashing is substantially eliminated, it is allowable differential pressure, making it impossible to use the more hollow fiber membranes.

【0017】図4にこのろ過装置の通水差圧変化の例を示す。 [0017] FIG 4 shows an example of the passing water bottle pressure change of the filtration device. 本図は、中空糸膜式ろ過装置の通水と低圧空気逆洗を繰り返したときの運転時間とろ過差圧の関係を示したものである。 This figure shows the operating relationship between the time and the filtration pressure difference at the time of repeated water passage and the low pressure air backwash the hollow fiber membrane filtration system. 横軸はその運転時間を表し、縦軸は入口配管12と出口配管13の内包流体の圧力差すなわちろ過差圧を表す。 The horizontal axis represents the operation time and the vertical axis represents the pressure difference i.e. filtration differential pressure of inclusion fluid inlet pipe 12 and outlet pipe 13. 曲線イはろ過差圧変化を示しており、運転時間の経過に伴い、ろ過差圧が徐々に増加する。 Kyokusen'i shows the filtered difference pressure change, with the lapse of operating time, the filtration pressure difference gradually increases. これは中空糸膜40の表面に懸濁物が蓄積され中空糸膜40 This suspension is accumulated on the surface of the hollow fiber membrane 40 hollow fiber membranes 40
のろ過抵抗が増大するためである。 This is because the filtration resistance of the increases. ロ点でろ過処理を停止し、逆洗を行い低下した差圧がハ点である。 Stop the filtration treatment with B point, reduced differential pressure performed backwashing is C point.

【0018】その後のろ過処理運転でも運転時間の経過に伴いロ点差圧近傍に達した時点でろ過処理を停止し、 [0018] Also stop filtration when it reaches the B point difference 圧近 near with the lapse of operating time in subsequent filtration treatment operation,
逆洗を行う。 Perform the backwash. ここで、前述の如く、逆洗毎に中空糸膜外表面に懸濁物が残存するためろ過運転時間の経過に伴う差圧上昇をロ点の差圧までろ過処理し、ろ過と逆洗を繰り返すと、中空糸膜ろ過膜外面に残存する懸濁物により運転間隔AはB,C,Dと短くなるため中空糸膜の寿命も短かった。 Here, as described above, the differential pressure increases over the course of a filtration operation time for suspension in the hollow fiber membrane outer surface each backwash remains to filtration to differential pressure dewpoint, filtered and backwash Again, headway a by suspension remaining in the hollow fiber membrane filtration membrane outer surface B, C, also shorter life of the hollow fiber membrane to become shorter and D.

【0019】なお、この種の装置として関連するものは、例えば、特願平10−12253 号出願(参照)等が上げられる。 [0019] Note that the related As this type of device, for example, Japanese Patent Application No. 10-12253 filed (see) and the like.

【0020】 [0020]

【発明が解決しようとする課題】上記従来技術には、ろ過処理時及び低圧空気逆洗時の水または空気が中空糸膜40に均一に供給されないことから、中空糸膜40によるろ過機能を有効に使用することができなくなるとともに、低圧空気逆洗後に中空糸膜40の外表面に捕捉された懸濁物が残存する可能性があった。 To the invention is to be solved INVENTION The above prior art, since the water or air during filtration process and low pressure air backwashing is not uniformly supplied to the hollow fiber membrane 40, enable the filtering function by the hollow fiber membrane 40 together it becomes impossible to use, the suspension trapped on the outer surface of the hollow fiber membrane 40 after the low-pressure air backwashing there is a possibility that the remaining.

【0021】これは、ろ過処理時の水は、中空糸膜モジュール挿入用外筒51の下端に設けられたスカート57 [0021] This water filtration process, the skirt 57 provided at the lower end of the hollow fiber membrane module for insertion outer tube 51
によって形成された開口部から供給され、その時供給される水の水圧は、下部端部材31′の端面に直接付加されるため、スカート57の開口部から供給される水の流量が多くなるに伴い下部端部材31′の端面に付加される水圧値も大きくなる。 It is supplied from the opening formed by the water pressure of the water supplied at that time, because it is directly attached to the end surface of the lower end member 31 ', with the flow rate of water supplied from the opening of the skirt 57 is increased pressure value to be added to the end face of the lower end member 31 'is also increased. すなわち、水圧値が下部端部材31′に中空糸膜40の糸を接着固定する時に使用している接着剤の許容値範囲を超えた場合は、中空糸膜40 That is, when the water pressure value exceeds the allowable value range of adhesives are using when bonded yarn of the hollow fiber membrane 40 to the lower end member 31 ', the hollow fiber membranes 40
の糸が接着剤から剥離する可能性を有しており、これを防止するため、下部端部材31′に使用する接着剤量を多くしている。 Yarn has the potential to peel from the adhesive, in order to prevent this, and to increase the amount of adhesive to be used in the lower end member 31 '.

【0022】また、低圧空気逆洗時においては、スカート57によって形成された開口部から供給される低圧空気中で、特にスカート57近傍付近に供給される低圧空気においては、供給される部分が開口状態であるため、 Further, at the time of low pressure air backwash, low pressure in the air supplied from the opening formed by the skirt 57, in the low-pressure air to be particularly provided in the vicinity of the vicinity of the skirt 57, the portion to be supplied open because it is a state,
スカート57の外側に流出してしまうことから、下部端部材31′の端面に供給される低圧空気量は、端面の部位の違いにより、変動するため、低圧空気逆洗時に必要となる空気量を中空糸膜モジュール5内に供給できなくなることによるものである。 Since flows out to the outside of the skirt 57, the low pressure air amount supplied to the end face of the lower end member 31 ', due to differences in the site of the end face, in order to vary the amount of air required for low-pressure air backwash it is by can not be supplied to the hollow fiber membrane module 5.

【0023】本発明の目的は、中空糸膜によるろ過処理及び低圧空気逆洗時の向上性を図ることができる下部キャップ付中空糸膜モジュールを提供することにある。 It is an object of the present invention is to provide a hollow fiber membrane module with a lower cap which can be improved at the time of the filtration process and the low pressure air backwash by hollow fiber membrane.

【0024】 [0024]

【課題を解決するための手段】本発明の中空糸膜モジュールは、中空糸膜モジュール挿入用外筒の下端部材にキャップを有し、このキャップの端面に給水用及び逆洗時の水または空気を導入するための複数個の集水穴を設けた。 Means for Solving the Problems] The hollow fiber membrane module of the present invention has a cap at the lower end member of the hollow fiber membrane module for insertion outer tube, water or air at the time of water supply and backwash on the end face of the cap a plurality of water collecting hole for introducing provided.

【0025】上記により、中空糸膜によるろ過処理及び低圧空気逆洗時の向上性を図るものとする。 [0025] By the above, it is assumed to improve properties during filtration treatment and low pressure air backwash by hollow fiber membrane.

【0026】 [0026]

【発明の実施の形態】以下、本発明の実施例を図面を使って説明する。 BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention using the drawings.

【0027】本実施例は、前述の従来例に比べて、原液を中空糸膜でろ過処理し懸濁物を除去する機能には変わりがなく、また、中空糸膜式ろ過装置のろ過器廻りの構成も変わることはない。 [0027] This embodiment, as compared with the conventional example described above, no change in the filtration process and the ability to remove suspended matter in the hollow fiber membrane dope also filter around the hollow fiber membrane filtration device is not that also the configuration change.

【0028】すなわち、本実施例においては、前述従来例と同様、図5に示す如く、中空糸膜モジュール5は、 [0028] That is, in this embodiment, similar to the above prior art example, as shown in FIG. 5, the hollow fiber membrane module 5,
胴容器1と蓋容器2で挟まれた仕切板3に従来例の中空糸膜モジュール5と同様に1個または複数個吊り下げられ、押え板4にて固定されている。 Similarly suspended one or more hollow fiber membrane module 5 in the conventional example in the partition plate 3 sandwiched between the cylinder container 1 and the lid container 2, and is fixed by the pressing plate 4. 原液は、原液入口弁11,原液入口管12を介して胴容器1内に導かれ、中空糸膜モジュール5内の中空糸膜でろ過処理される。 Stock solution, the stock solution inlet valve 11 is guided into the cylinder chamber 1 through the stock solution inlet pipe 12, is filtration with hollow fiber membranes of the hollow fiber membrane module 5. その処理液は、蓋容器2内に集められ、処理液出口管1 The process liquid is collected in the lid container 2, the treatment liquid outlet pipe 1
3,処理液出口弁14を通り下流系統に送られる。 3, and sent to the processing liquid outlet valve 14 as a downstream system.

【0029】中空糸膜の逆洗は、下部空気入口弁15, The backwash of the hollow fiber membrane, the lower air inlet valve 15,
下部空気入口管16より供給される低圧空気による低圧空気逆洗と、上部空気入口弁19,上部空気入口管20 A low pressure air backwash by the low-pressure air supplied from the lower air inlet pipe 16, the upper air inlet valve 19, the upper air inlet tube 20
より供給される高圧空気による高圧空気逆洗とにより行い、その空気は、ベント管17,ベント弁18を介して排出され、容器内保有液は、ドレン管21,ドレン弁2 Carried out by a high pressure air backwash by the high-pressure air to be more supply, the air vent pipe 17 is discharged through the vent valve 18, vessel held liquid drain pipe 21, drain valve 2
2を通って排出される。 It is discharged through the 2.

【0030】図1は、本実施例における中空糸膜モジュールの構造を示すものである。 FIG. 1 shows the structure of a hollow fiber membrane module according to the present embodiment.

【0031】本実施例が従来と相違する点は、中空糸膜モジュール挿入用外筒51の下端にキャップ55を有し、このキャップ55の端面に給水用及び逆洗時の水または空気を導入するための複数個の集水穴56を設けたことによる。 [0031] that this embodiment differs from the prior art, a cap 55 at the lower end of the hollow fiber membrane module for insertion outer tube 51, introducing water or air at the time of water supply and backwash on the end face of the cap 55 due to which a plurality of water collecting hole 56 for providing.

【0032】ここで、本実施例における中空糸膜モジュール挿入用外筒51の下端にキャップ55を設け、このキャップ55の端面部に図2に示すように、複数個の集水穴56を設けている。 [0032] Here, the cap 55 at the lower end of the hollow fiber membrane module for insertion outer tube 51 in this embodiment is provided, as shown in FIG. 2 on the end face of the cap 55, it is provided a plurality of water collecting hole 56 ing. さらに、中空糸膜モジュールの下端部の膜を束ねて接着固定した端面より集水穴56までの距離を例えば、図1の実施例のごとく約20mm以上離し、キャップ部外側の縁の長さを集水穴56から約1 Further, the distance from the end surface which is adhered and fixed by bundling a film of the lower end portion of the hollow fiber membrane module to the catchment hole 56 for example, a distance of about 20mm or more as in the embodiment of FIG. 1, the length of the cap portion outer edge from the current water holes 56 about 1
0mm以上離すことにより、ろ過処理する時の原液を集水するための機能を持たせている。 By releasing or 0 mm, it is provided with a function for collecting a stock solution at the time of filtration.

【0033】この技術は、従来の中空糸膜モジュール4 [0033] This technique is conventional hollow fiber membrane module 4
1における中空糸膜モジュール挿入用外筒51の下端にスカート57を設け、開口状態としていることから、開口部に原液を集水する機能と同様である。 The skirt 57 is provided at the lower end of the hollow fiber membrane module for insertion outer tube 51 in 1, since it is the open state is similar to the function of collecting the stock solution into the opening. 従来とは、キャップ55を設けたことにより、供給される時の原液の水圧がキャップ55で吸収されることになる。 Conventional and, by providing the cap 55, so that the pressure of stock as it is fed is absorbed by the cap 55.

【0034】これにより、中空糸膜モジュール挿入用外筒51の下端にスカート57を設けた場合に比べ、中空糸膜40の糸を接着固定している下部端部材31′の端面に供給される時の水圧を低く抑えられることになる。 [0034] Thus, supplied to the end surface of the comparison with the case where the skirt 57 is provided at the lower end of the hollow fiber membrane module for insertion outer tube 51, the lower end member 31 the thread of the hollow fiber membranes 40 are adhered and fixed ' It will be suppressed the pressure of time low.

【0035】すなわち、ろ過処理時に下部端部材31′ [0035] That is, the lower end member 31 during the filtration process'
の端面に供給される原液の水圧を低く抑えることにより、中空糸膜40の糸を接着固定する時に使用している接着剤の許容値範囲内での使用が可能となり、中空糸膜40の糸が接着剤から剥離する要因が排除されることになる。 Yarn by suppressing the pressure of the stock solution to be supplied to the end surface, it is possible to use within the tolerance range of the adhesive using the yarn of the hollow fiber membrane 40 when bonding and fixing, of the hollow fiber membranes 40 There will be factors to peel from the adhesive is eliminated.

【0036】また、低圧空気逆洗時においてもろ過処理時と同様に、低圧空気逆洗時に供給される低圧空気をキャップ55で形成された集水部に集水するための機能を持たせている。 Further, as in the case of even the filtration treatment during low pressure air backwash, to have a function for collecting a low-pressure air supplied to the low-pressure air backwash the water collecting part formed by the cap 55 there. この技術は、従来の中空糸膜モジュール41における中空糸膜モジュール挿入用外筒51の下端にスカート57を設け、開口状態としていることから、 This technique, since the skirt 57 provided at the lower end of the hollow fiber membrane module for insertion outer tube 51 in a conventional hollow fiber membrane module 41, and an opening state,
開口部に空気を集水する機能と同様である。 It is similar to the function of collecting the air in the opening. 従来とは、 Conventional and is,
キャップ55を設け、さらにこのキャップ55の端面に集水穴56を設けたことにより、キャップ55で形成された集水部に供給された低圧空気の流出を防止できることになる。 The cap 55 is provided, further by providing the collecting holes 56 in the end face of the cap 55, it becomes possible to prevent the outflow of the low-pressure air supplied to the water collecting part formed by the cap 55.

【0037】これにより、従来の中空糸膜モジュール4 [0037] Thus, the conventional hollow fiber membrane module 4
1における中空糸膜モジュール挿入用外筒51の下端にスカート57を設けた場合に比べ、低圧空気量が下部端部材31′の端面に均等に供給されることになる。 Compared with the case where the skirt 57 is provided at the lower end of the hollow fiber membrane module for insertion outer tube 51 in 1, so that the amount of low-pressure air is uniformly supplied to the end face of the lower end member 31 '.

【0038】すなわち、低圧空気逆洗時に供給される低圧空気量は、下部端部材31′の端面の部位で変動しないため、水と低圧空気の境界面での波立ち発生を防止でき、低圧空気逆洗時に必要となる空気量を中空糸膜モジュール5に供給できることになる。 [0038] That is, the low pressure air amount supplied to the low-pressure air backwash, because it does not change at the site of the end face of the lower end member 31 ', it is possible to prevent waving occurs at the interface of water and the low pressure air, low pressure air inverse It becomes possible to supply the amount of air needed when washing the hollow fiber membrane module 5.

【0039】上記により、ろ過処理及び低圧空気逆洗時に供給される水または空気が集水穴56内を通って、下部端部材31′に設けられた案内管54より中空糸膜4 [0039] By the above, filtration and water or air is supplied at low pressure air backwashing through the water collecting hole 56, the hollow fiber membrane 4 from the guide tube 54 provided in the lower end member 31 '
0に供給される。 0 is supplied to. すなわち、ろ過処理及び低圧空気逆洗時に常時一定の水または空気量が確保可能となることから、中空糸膜40によるろ過処理機能及び低圧空気逆洗が効率的に行われるようになる。 That is, certain water or air quantity always during the filtration treatment, and a low pressure air backwashing since it becomes possible to secure, so filtering processing function and low pressure air backwash by hollow fiber membranes 40 is effectively performed.

【0040】 [0040]

【発明の効果】本発明によれば、中空糸膜によるろ過処理時及び中空糸膜の外表面に捕捉蓄積された懸濁物を低圧空気逆洗により除去させる低圧空気逆洗時において、 According to the present invention, at the time of low pressure air backwash to remove by filtration treatment with hollow fiber membrane and captured accumulated suspension to the outer surface of the hollow fiber membrane low pressure air backwash,
中空糸膜モジュール挿入用外筒の下部端部材にキャップを有し、このキャップの端面に給水用及び逆洗時の水または空気を導入するための複数個の集水穴を設けたことにより、ろ過処理時及び低圧空気逆洗時に常時一定の水または空気量を確保できるため、中空糸膜によるろ過処理機能及び低圧空気逆洗を効率よく行うための効果が図れる。 A cap at the bottom end member of the hollow fiber membrane module for insertion outer tube, by providing a plurality of water collecting hole for introducing water or air at the time of water supply and backwash on the end face of the cap, It can be secured to a filtration treatment and at all times a constant water or air volume at low pressure air backwash, thereby the effect for performing a filtering process functions and low pressure air backwash by hollow fiber membranes efficiently.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明による中空糸膜モジュールの構造を示す側断面図。 Sectional side view showing the structure of a hollow fiber membrane module according to the invention; FIG.

【図2】図1のA−A線断面図。 [2] A-A line sectional view of FIG.

【図3】従来の中空糸膜モジュールの構造を示す側断面図。 Figure 3 is a side sectional view showing a structure of a conventional hollow fiber membrane module.

【図4】従来の中空糸膜式ろ過装置の性能を示す特性図。 [4] characteristic diagram showing the performance of a conventional hollow fiber membrane filtration system.

【図5】中空糸膜式ろ過装置廻り概略構成を示す詳細図。 [5] detailed view showing a hollow fiber membrane filtration device around schematic configuration.

【符号の説明】 DESCRIPTION OF SYMBOLS

1…胴容器、2…蓋容器、3…仕切板、4…押え板、5 1 ... cylinder vessel 2 ... lid container, 3 ... partition plate, 4 ... pressing plate, 5
…中空糸膜モジュール、31…端部材、32…シール材、40…中空糸膜、41…従来の中空糸膜モジュール、42…本発明の中空糸膜モジュール、47…逆洗空気穴、51…中空糸膜モジュール挿入用外筒、54…案内管、55…キャップ、56…集水穴、57…スカート。 ... hollow fiber membrane module, 31 ... end member, 32 ... sealing member, 40 ... hollow fiber membrane, 41 ... conventional hollow fiber membrane module, 42 ... hollow fiber membrane module of the present invention, 47 ... backwash air hole 51 ... The hollow fiber membrane module for insertion outer tube, 54 ... guide pipe, 55 ... cap, 56 ... water holes collector, 57 ... skirt.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 塩沢 義博 茨城県日立市幸町三丁目2番1号 日立エ ンジニアリング株式会社内 (72)発明者 平林 健太郎 茨城県日立市幸町三丁目1番1号 株式会 社日立製作所日立工場内 Fターム(参考) 4D006 GA02 HA03 HA19 JA08A JA10A JA23Z JA29A JA31A KC02 KC03 KC14 MA01 PB03 ────────────────────────────────────────────────── ─── of the front page continued (72) inventor Yoshihiro Shiozawa Hitachi City, Ibaraki Prefecture Saiwaicho Third Street No. 2 No. 1 Hitachi engineering Co., Ltd. in the (72) inventor Kentaro Hirabayashi Hitachi City, Ibaraki Prefecture Saiwaicho Third Street No. 1 No. 1 stock company Hitachi, Ltd. Hitachi factory in the F-term (reference) 4D006 GA02 HA03 HA19 JA08A JA10A JA23Z JA29A JA31A KC02 KC03 KC14 MA01 PB03

Claims (3)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】原液入口と処理液出口を有する容器本体と容器内に仕切板を設け、この仕切板に固定された1個または、複数個の中空糸膜モジュールを設備した中空糸膜フィルタで、給水用及び逆洗時の水または空気の導入及び排出用に設けられた多数の穴を開けた中空糸膜モジュール挿入用外筒と、外筒の上端に固着され上記仕切板に懸架する上端部材と、上記外筒の下端にキャップを設けた中空糸膜モジュールにおいて、下端キャップの端面に給水用及び逆洗時の水または空気を導入する複数個の集水穴を設けたことを特徴とする中空糸膜モジュール。 1. A partition plate provided in the stock solution inlet and the treatment liquid container body and a container having an outlet, the one fixed to the partition plate or a plurality of hollow fiber membrane module in the hollow fiber membrane filters facilities a hollow fiber membrane module for insertion outer tube opened the number of holes provided for the introduction and discharge of water or air at the time of water supply and backwash, the top end for suspending the fixed to the upper end of the outer tube the partition plate and the member, the hollow fiber membrane module having a cap at the lower end of the outer tube, and characterized in that a plurality of water collecting hole for introducing water or air at the time of water supply and backwash on the end face of the lower end cap the hollow fiber membrane module.
  2. 【請求項2】中空糸膜モジュール挿入用外筒の下端のキャップに、中空糸膜モジュールへの給水用及び逆洗時の水または空気を集水する機能を有したことを特徴とする請求項1に記載の中空糸膜モジュール。 To 2. A hollow fiber membrane module of the insertion barrel bottom cap, the claims of water or air at the time of water supply and backwashing of the hollow fiber membrane module characterized by having a function of collecting the hollow fiber membrane module according to 1.
  3. 【請求項3】キャップの端面に設けた複数個の集水穴は、中空糸膜モジュールの下端部に導入する水または空気を分散させる機能を有したことを特徴とする請求項1 3. A plurality of water collecting hole provided in the end face of the cap, according to claim, characterized in that having a function of dispersing water or air is introduced into the lower end of the hollow fiber membrane module 1
    に記載の中空糸膜モジュール。 The hollow fiber membrane module according to.
JP10221305A 1998-08-05 1998-08-05 Hollow fiber membrane module fitted with lower cap Pending JP2000051669A (en)

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