JPH1085566A - Pleated type filter - Google Patents

Pleated type filter

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Publication number
JPH1085566A
JPH1085566A JP24014096A JP24014096A JPH1085566A JP H1085566 A JPH1085566 A JP H1085566A JP 24014096 A JP24014096 A JP 24014096A JP 24014096 A JP24014096 A JP 24014096A JP H1085566 A JPH1085566 A JP H1085566A
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Japan
Prior art keywords
pleated
backwash
water
filtration
backwashing
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Pending
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JP24014096A
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Japanese (ja)
Inventor
Seiichi Kazama
Kyoichi Okubo
Yoshihiro Shiozawa
義博 塩沢
享一 大久保
誠一 風間
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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 JP24014096A priority Critical patent/JPH1085566A/en
Publication of JPH1085566A publication Critical patent/JPH1085566A/en
Application status is Pending legal-status Critical

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Abstract

PROBLEM TO BE SOLVED: To discharge backwash water uniformly and improve the backwash efficiency by feeding water in a body vessel with a pleated element and increase the resistance on the outer surface of a pleated type filter membrane at the time of backwashing. SOLUTION: At the time of backwashing, a valve 6 is opened and the inside of a cover vessel 4 is pressurized by compressed air in an air tank 7. After pressurizing, when a drain valve 11 is opened quickly, the air in the cover vessel 4 is expanded, following which backwash water in the cover vessel 4 is backwashed from the inner surface to the outer surface of a plated type membrane 12 to backwash elements 12. At the time of repeating the operation, the inside of the cover vessel 4 and the body vessel 3 are in the state of being filled sufficiently with reinforcing water supply from a reinforcing water line 8 and a valve 9, and then the operation of pressurizing by the compressed air in the air tank 7 and opening the drain valve 11 is repeated to backwash the pleated type elements 12. The water level in a filter is adjusted by the arrangement and efficient backwashing is carried out to uniformize the backwash intervals and extend the period of use.

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】本発明はプリーツ型ろ過装置に関する。 The present invention relates to relates to pleated filtration device.

【0002】 [0002]

【従来の技術】例えば、火力・原子力発電プラント内の復水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ているろ過装置として、従来は、 BACKGROUND ART For example, as being a filtration apparatus used for separating off the suspension mainly containing such iron rust which is present in the condensate in thermal and nuclear power plants, conventionally,
粉末イオン交換樹脂等のろ過助材を繊維状又は、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くても運用可能なプリーツ型エレメントを装着したプリーツ型ろ過装置が採用されるようになってきた。 Powder ions fibrous filtration aids exchange resin 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 , pleated filtration device without using wearing the interoperable pleated elements the filter aid material have come to be employed.
プリーツ型ろ過装置は、ろ過助材を使用しない運用が可能なため従来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なくなり、廃棄物発生量が少なくなる。 Pleated filtration device, there is no filter aid material contained in the waste generated by conventional precoat type filter unit for operation is possible without using a filter aid material, the amount of waste generated is reduced. また、除去性能がすぐれていることにより、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 removing performance is excellent, widely used in water treatment apparatus for removing a variety of suspension. プリーツ型ろ過装置は、ろ過処理時間の経過に伴い、膜外表面に原水中の除去対象懸濁物が捕捉され、次第に膜のろ過効率が低下する。 Pleated filtration apparatus, with the lapse of filtration time, the removal target suspension in the raw water are trapped on the outer surface of the membrane, gradually filtration efficiency of the membrane is lowered. この現象を以下に説明する。 This phenomenon will be described below.

【0003】図4は、プリーツ型ろ過装置のろ過器廻りの概略構成の一例を示すものであり、プリーツ型エレメント12が、胴容器3と蓋容器4にはさまれた管板13 [0003] Figure 4 shows an example of a schematic configuration of a filter around the pleated filtration device, pleated element 12, tube sandwiched between the trunk container 3 and lid containers 4 plate 13
に複数本吊り下げられている場合を示す。 It shows a case in which suspended a plurality of the.

【0004】ろ過処理の必要な原水は、原水入口管1を介して胴容器3に導かれプリーツ型エレメント12内に束ねられているプリーツ型ろ過膜の外表面から内側に流れる過程でろ過処理され、蓋容器4に集められ、処理水出口管2を経て下流系統に送られる。 [0004] raw water required for the filtration process is filtration treatment in the process of flowing inwardly from the outer surface of the pleated filtration membranes are bundled Led pleated element 12 in cylinder container 3 through the raw water inlet pipe 1 , collected in the lid container 4 and sent to downstream systems through the treated water outlet pipe 2. このろ過で分離された懸濁物はプリーツ型ろ過膜の外表面に捕捉蓄積され、これによりプリーツ型ろ過膜に開いた細孔が徐々に塞がれ、これに従いプリーツ型ろ過膜のろ過抵抗が増大し、ろ過差圧が上昇する。 The separated suspension by filtration is captured accumulated on the outer surface of the pleated filtration membrane, thereby the open pores in the pleated filtration membrane is gradually blocked, which in accordance with the filtration resistance of the pleated filtration membrane increases, the filtration differential pressure rises. ろ過差圧が規定値に達するとプリーツ型エレメントの逆洗を行う。 Performing backwashing of the pleated element when the filtration differential pressure reaches a predetermined value. プリーツ型エレメントの逆洗は、空気タンク7から、空気弁6,空気配管5より供給される高圧空気により蓋容器4内に保有する逆洗水を圧送しプリーツ型ろ過膜の内側から外側に流すことによりプリーツ型ろ過膜外表面上の懸濁物を除去する高圧空気逆洗を行う。 Backwashing of the pleated element to flow from the air tank 7, an air valve 6, outside the backwash water held in the lid container 4 by high pressure air supplied from the air pipe 5 from the inside of the pumping and pleated filtration membrane performing high pressure air back washing for removing a suspension of the pleated filtration membrane outer surface by. ろ過膜から剥がされた懸濁物は逆洗水とともにドレン配管10を通って胴容器3より排出される。 Was peeled from the filtration membrane suspension is discharged from the cylinder chamber 3 through the drain pipe 10 together with the backwash water. プリーツ型エレメントの逆洗効果を向上させるため、高圧空気逆洗は、繰り返し実施する。 To improve the backwash effectiveness pleated element, high pressure air backwash is repeated. つまり、 That is,
蓋容器4に補給水ライン8,弁9を開として補給水を充填し、蓋容器4に逆洗水を供給満水とした後、前述の操作と同様高圧空気によるプリーツ型ろ過膜の内側から外側への逆洗を行い、胴容器3から排出する。 Makeup water line 8 to the lid container 4 was filled with makeup water valve 9 is opened, after the supply full water backwash water-lid containers 4, the outside from the inside of the pleated filtration membrane according to similar high pressure air and the aforementioned operation It performs a backwash to be discharged from the body container 3. ここで、蓋容器4に充填された逆洗水はろ過膜の比抵抗が小さいため空気圧を掛ける前にその一部がろ過膜を通して胴容器3に流れてしまう。 Here, the backwash water filled in the lid container 4 partially before applying the pressure for having small specific resistance of the filtration membrane may flow to the cylinder chamber 3 through a filtration membrane. また、繰り返し逆洗を行っても一回の逆洗で大量の水を流せないため外表面に捕捉された懸濁物は完全に除去することができず、一部が残存する。 Also, captured suspension to the outer surface because even after repeated backwashing not allowed to flow, large quantities of water in a single backwash can not be completely removed, a portion remains.
そのため逆洗を実施した直後のろ過差圧はプリーツ型エレメントをろ過に供した当初のろ過差圧まで回復せず、 Therefore the filtration differential pressure immediately after implementing the backwash did not recover to the initial filtration pressure difference was subjected to filtration pleated element,
当初のろ過差圧より高くなり、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。 Higher than the initial filtration pressure difference, then, also increases correspondingly filtration differential pressure when subjected to filtration again. 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プリーツ型エレメント外表面に残存する懸濁物は徐々に増加するためろ過差圧増加も早くなり、逆洗間隔が短くなり、 Repeated filtration and backwash, suspension remaining in the pleated element outer surface without being removed by the backwash gradually filtered differential pressure increase also faster to increase backwash interval is shortened,
逆洗によるろ過差圧の回復が実質的になくなって、それ以上のプリーツ型エレメントの使用が不可能となり、ここに至った時はプリーツ型エレメントを新品と交換する。 Recovery of the filtration differential pressure by backwashing is substantially eliminated, it is impossible to use the more pleated elements, when reaching herein is replaced with a new pleated type element.

【0005】図5にろ過装置の通水差圧変化の例を示す。 [0005] An example of a passing water bottle pressure change of the filter in FIG. 本図は、プリーツ型ろ過装置の通水と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。 The figure shows the relationship between operating time and the filtration pressure difference at the time of repeated water flow and backwash pleated filtration device. 横軸はその運転時間を表し、縦軸は入口配管1と出口配管2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 contained fluid inlet pipe 1 and outlet pipe 2 that is, represents a filtration pressure difference. 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. これはプリーツ型エレメント12の表面に懸濁物が蓄積され、プリーツ型エレメント12のろ過抵抗が増大するためである。 This suspension is accumulated on the surface of the pleated element 12, because the filtration resistance of the pleated element 12 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. 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、逆洗を行う。 Even with the lapse of operating time in subsequent filtration operation, it stops the filtration process when it reaches the B point difference 圧近 near performs backwash. ここで前述のように、逆洗毎にプリーツ型エレメント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、プリーツ型ろ過膜外表面に残存する懸濁物により運転間隔tはt′,t″,t′′′と短くなるため、 Here, as described above, filtered handles differential pressure rise over the course of a filtration operation time for suspension in pleated element outer surface of each backwash remains until the pressure difference B point, the filtration and backwash Again, the operation interval t by suspension remaining in the pleated filtration membrane outer surface t ', t ", t' becomes for short as '',
プリーツ型ろ過装置の運転が煩雑となり、プリーツ型エレメントの寿命も短かった。 Operation of the pleated filtration device is complicated, the life of the pleated element also shorter. なお、この種の装置として関連するものは、例えば、特開平8−172043 号公報が挙げられる。 Incidentally, related as this type of apparatus, for example, JP-A 8-172043 JP.

【0006】 [0006]

【発明が解決しようとする課題】上記従来技術には、プリーツ型エレメント12の逆洗毎にプリーツ型エレメント外表面に捕捉懸濁物が残存するため、ろ過時間が徐々に短くなる問題があった。 To the invention it is to be solved INVENTION The above prior art, since the trapping suspension in pleated element outer surface of each backwash the pleated element 12 remains, there is a problem that the filtration time is gradually shortened .

【0007】これは、逆洗時、プリーツ型ろ過膜の比抵抗が小さく、蓋容器4内に充填された逆洗水が空気圧を掛ける前に、一部ろ過膜を通じて胴容器3に流れてしまい逆洗水の通過し易い部分に多く水が流れ、逆洗が不均一となることによる。 [0007] This is the reverse washing, small specific resistance of the pleated filtration membrane, before backwash water filled in the lid container 4 is multiplied by the air pressure, it will flow to the cylinder chamber 3 through some filtration membranes many water flows to pass easily portion of the backwash water, due to the fact that backwashing is not uniform.

【0008】本発明の目的は、プリーツ型エレメントの外表面に捕捉された懸濁物の除去を効率よく行うことにある。 An object of the present invention is to efficiently perform removal of trapped suspension to the outer surface of the pleated element.

【0009】 [0009]

【課題を解決するための手段】上記目的を達成するために、本発明はプリーツ型エレメントの逆洗時に、プリーツ型ろ過膜の比抵抗を増加させるため、プリーツ型エレメントが装着される胴容器を水張りすることによりプリーツ型ろ過膜外表面の抵抗を増加させることにより、逆洗水の均一分配を図り逆洗効率を向上させる。 To achieve the above object of the Invention The present invention during backwashing of the pleated element, for increasing the specific resistance of the pleated filtration membrane, a cylinder container pleated element is mounted by increasing the resistance of the pleated filtration membrane outer surface by water filling, to improve the backwash efficiency achieving uniform distribution of backwash water.

【0010】プリーツ型エレメントの逆洗時に、蓋容器4だけでなく胴容器3内にも補給水を充填させることによりプリーツ型ろ過膜外表面の抵抗が増加するため、逆洗水がプリーツ型ろ過膜内に均一に分配されることになる。 [0010] during backwashing of the pleated element, the resistance of the pleated filtration membrane outer surface whereby also filled with makeup water into the drum container 3 not only cover the container 4 increases, the backwash water is pleated filtration It would be uniformly distributed in the film. またプリーツ型ろ過膜は、空気逆洗も可能であるため胴容器3内のみを補給水で充填させ、プリーツ型ろ過膜の抵抗を増加させ、空気タンク7より供給される高圧空気がろ過膜内に均一分配される。 The pleated filtration membrane, only the barrel container 3 for air backwashing is also possible to fill in makeup water, increasing the resistance of the pleated filtration membrane, the high pressure air within the filtration membrane supplied from the air tank 7 It is uniformly distributed. さらに逆洗効果向上のため胴容器3内の補給水の水位を変化させながら逆洗を行うことにより、ろ過膜をいくつかの部分に分けて逆洗でき、極部的な逆洗も可能となり、逆洗効果が向上しプリーツ型エレメント外表面への懸濁物残存が少なくなる。 By performing backwash while changing the water level of the replenishing water in the drum container 3 for backwashing effect improved further, you can backwash in several portions a filtration membrane, pole manner backwash possible and become , improved backwash effect suspension remaining in the pleated element outer surface is reduced.

【0011】 [0011]

【発明の実施の形態】以下、本発明の一実施例を図面を用いて説明する。 BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, will be explained with reference to the drawings an embodiment of the present invention.

【0012】原水をプリーツ型エレメントでろ過処理する機能は変わらない。 [0012] The ability to filtration treatment with pleated element of the raw water is not changed.

【0013】図1は、エレメントを吊り下げるタイプのろ過装置の全体構成の一例を示す。 [0013] Figure 1 shows an example of the overall configuration of a type of filtering device for suspending the elements. 胴容器3の下部には入口配管1、上部には出口配管2が接続されている。 Inlet pipe 1 in the lower portion of the body vessel 3, an outlet pipe 2 is connected to the upper.

【0014】ろ過装置の構成で、プリーツ型エレメント12の逆洗は次のように行う。 [0015] In construction of the filtering device, backwash the pleated element 12 is performed as follows.

【0015】まず、弁6,弁9及び弁11を閉じた状態で入口配管1より原水を胴容器3に流し、出口配管2より処理水を取り出し、ろ過処理運転を行う。 Firstly, the valve 6, flowing raw water from inlet pipe 1 is closed the valve 9 and valve 11 to the cylinder container 3, takes out the treated water from the outlet pipe 2, performs the filtering process operation. ろ過処理運転に伴い、原水中の懸濁物がプリーツ型エレメント12 As the filtration operation, the raw water suspension pleated element 12
の外表面に捕捉蓄積され図5に示すようにろ過差圧が上昇し、規定差圧ロ点に達した時点で逆洗操作を行う。 Of trapped accumulated on the outer surface diagram filtration differential pressure as shown in 5 rises, performing backwash operation when it reaches the prescribed difference 圧Ro point. まず、弁20,21を閉じて、原水の通水を停止する。 First, close the valve 20, 21, to stop the water flow of the raw water. 次に、弁6を開き、空気タンク7内の圧縮空気で蓋容器4 Next, opening valve 6, lid containers 4 in the compressed air in the air tank 7
内を加圧する。 An inner pressurized. 加圧後、ドレン弁11を急速開することにより蓋容器4内の空気が膨張し、これに伴い、蓋容器内の逆洗水がプリーツ型ろ過膜の内表面から外表面側へ逆流し、プリーツ型エレメント12を逆洗する。 After pressurization, the air in the lid containers 4 is expanded by rapidly opening the drain valve 11, Accordingly, the backwash water in the lid container flows back from the inner surface of the pleated filtration membrane to the outer surface, backwashing the pleated element 12. この方式は、繰り返し操作が可能であり、繰り返す場合は蓋容器4内及び胴容器3内を補給水ライン8,弁9から供給の補給水で満水状態にしたうえで、再度、空気タンク7 This method is capable of repeatedly operated, after the inner lid container 4 and the body vessel 3 from the supply water line 8, valve 9 to full level in makeup water supply if it is repeated again, the air tank 7
内の圧縮空気による加圧,ドレン弁11開の操作を繰り返し、プリーツ型エレメント12を逆洗する。 Pressurization by compressed air of the internal repeats drain valve 11 opens in operation, backwashing pleated element 12.

【0016】本実施例のプリーツ型ろ過装置の逆洗方法により、プリーツ型ろ過膜外面が水張り状態であるため、空気圧をかける前に逆洗水がろ過膜を通過することがなく、またろ過膜外面に水の圧力がかかるため懸濁物捕捉のばらつきに影響を受けずに逆洗水が均一に分配されるため、効率的な逆洗が行えることになる。 [0016] The backwash method pleated filtration apparatus of the present embodiment, since the pleated filtration membrane outer surface is water filling state, without backwash water to pass through the filtration membrane before applying pressure, also the filtration membrane since backwash water without being affected by variations in the suspension trapped water pressure is applied because the outer surface is uniformly distributed, so that the enabling efficient backwash.

【0017】図2は、プリーツ型ろ過膜の逆洗方法の応用例である。 [0017] FIG 2 is an application example of the backwash process of pleated filtration membrane. プリーツ型ろ過膜で空気での逆洗が可能なタイプの場合は、蓋容器4内を空としたのち、弁6を開き、空気タンク7内の空気を供給し、蓋容器4内の空気を加圧する。 For capable backwash air type pleated filtration membrane, after the air inside the lid containers 4, open the valve 6 to supply air in the air tank 7, the air in the container lid 4 pressurize. 次にドレン弁11を急速開いてプリーツ型ろ過膜の内表面から外表面側へ蓋容器4内に保有している圧縮空気を流し、プリーツ型エレメント12を逆洗する。 Then flowing compressed air that is held in the lid container 4 to the outer surface from the inner surface of the rapid open pleated filtration membrane drain valve 11, backwashing the pleated element 12. この方式は繰り返し操作が可能であり、繰り返す場合は胴容器3内のみを補給水ライン8及び弁9を開いて補給水で満水状態にしたうえで、蓋容器4内を加圧した後、ドレン弁11を開いてプリーツ型エレメント12を逆洗する。 After this method is capable of repeating the operation, which in terms of the only the barrel container 3 full level in make-up water to open the makeup water line 8 and valve 9, to pressurize the lid container 4 if repeated, drain backwashing the pleated element 12 opens the valve 11.

【0018】図3は、プリーツ型エレメントの下部を固定したタイプのプリーツ型ろ過装置を示す。 [0018] Figure 3 shows the type of pleated filtration apparatus where the lower fixed pleated element. 下部固定プリーツ型エレメントの場合、逆洗は下部よりの逆洗水で行う。 If lower fixing pleated element, backwash is performed at backwash water from the bottom. つまり、弁6を開き、空気タンク7内の空気を一気に下部鏡板15と下部仕切板16の間に保有の逆洗水へ供給し、プリーツ型エレメント下側からプリーツ型ろ過膜の内表面から外表面側へ逆洗水を流し、プリーツ型エレメント12を逆洗する。 That opens the valve 6, and supplies to the backwash water once held between the lower end plate 15 and the lower partition plate 16 the air in the air tank 7, the outer from the inner surface of the pleated filtration membrane from the pleated element lower flowing backwash water to the surface, backwashing pleated element 12. このプリーツ型エレメント下部固定タイプの場合、逆洗水が抵抗の少ないエレメント取付部分からの逆洗水の流れが多く、プリーツ型エレメント上部の逆洗効果が低下するため、胴容器3内の補給水の水位を変化させて逆洗する。 In this pleated element lower fixed type, since the backwash water often flow backwash water from a small element attaching portion of the resistor, the backwash effect of the upper pleated element decreases, makeup water in the drum container 3 changing the water level to backwashing.

【0019】つまり、補給水ライン8及び弁9からの補給水を供給し、エレメントの任意の位置での水位に調整する。 [0019] That is, the makeup water from the makeup water line 8 and valve 9 is supplied to adjust the water level at any position of the element. 空気供給弁6を開いて、ろ過器下部鏡15と下部仕切板16との間の逆洗水を加圧するとともにベント弁18を急速開し逆洗水を下部仕切板16に固定のエレメント12の内表面から外表面に逆洗させる。 Open the air supply valve 6, the filter lower mirror 15 and the lower partition plate 16 vent valve 18 rapidly opens City fixing element 12 of the backwash water to the lower partition plate 16 with the backwash water is pressurized between the from the inner surface to backwash the outer surface. このとき、 At this time,
エレメント外表面に水のあるエレメント下部は抵抗が大きく外表面に空気が接しているエレメント部分は膜の抵抗のみで抵抗が小さいため逆洗水は、外表面が空気に接している部分に多く流れるため、逆洗効果が向上する。 Backwash water for element bottom element section resistance is in contact is large air on the outer surface is small resistance only the resistance of the film to the element outer surface of the water, flows more in the portion where the outer surface in contact with air Therefore, to improve the backwash effectiveness.
この水位を調整しながら繰り返し逆洗することにより、 By backwashing repeatedly while adjusting the water level,
プリーツ型エレメントの均一逆洗を行う。 Perform uniform backwashing of the pleated element.

【0020】 [0020]

【発明の効果】本発明によれば、プリーツ型ろ過装置で、プリーツ型ろ過膜の外表面に付着した懸濁物を除去させる逆洗方法として、ろ過器内の水位を調整することにより、プリーツ型エレメントの効率的な逆洗ができ、 According to the present invention, in pleated filtration device, as backwash method for removing suspended matter attached to the outer surface of the pleated filtration membrane, by adjusting the water level in the filter, pleats it is efficient backwash of type element,
逆洗間隔の均一化及び使用期間の延長が図れる。 Attained is extended homogenization and the life of the backwash interval.

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

【図1】本発明によるプリーツ型ろ過装置の洗浄方法を示す一実施例の系統図。 System diagram of one embodiment illustrating a method for cleaning a pleated filtration device according to the invention; FIG.

【図2】本発明によるプリーツ型ろ過装置の洗浄方法を示す第二実施例の系統図。 System diagram of a second embodiment showing a method for cleaning a pleated filtration device according to the invention, FIG.

【図3】本発明によるプリーツ型ろ過装置の洗浄方法を示す第三実施例の系統図。 System diagram of a third embodiment illustrating a method for cleaning a pleated filtration apparatus according to the present invention; FIG.

【図4】従来のプリーツ型ろ過装置の洗浄方法を示す説明図。 Figure 4 is an explanatory diagram showing the cleaning method of the conventional pleated filtration device.

【図5】従来のプリーツ型ろ過装置の性能を示す説明図。 Figure 5 is an explanatory diagram showing the performance of a conventional pleated filtration device.

【符号の説明】 DESCRIPTION OF SYMBOLS

1…入口配管、2…出口配管、3…胴容器、4…蓋容器、5…空気配管、6…空気供給弁、7…空気タンク、 1 ... inlet pipe, 2 ... outlet pipe, 3 ... cylinder container 4 ... lid containers, 5 ... air pipe, 6 ... air supply valve, 7 ... air tank,
8…補給水配管、9…補給水供給弁、10…洗浄水排出配管、11…洗浄水排出弁、12…プリーツ型エレメント、13…仕切板。 8 ... makeup water piping, 9 ... makeup water supply valve, 10 ... washing water discharge pipe, 11 ... washing water discharge valve, 12 ... pleated element, 13 ... partition plate.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 風間 誠一 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 ────────────────────────────────────────────────── ─── of the front page continued (72) inventor Seiichi Kazama Hitachi City, Ibaraki Prefecture Saiwaicho Third Street No. 1 No. 1 stock company Hitachi, Ltd. Hitachi in the factory

Claims (3)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】プリーツ型のろ過膜で原水のろ過処理を行い、ろ過膜の逆洗は逆洗水をエレメントの通水方向とは逆方向に流して前記プリーツ型のろ過膜のろ過処理面に付着している懸濁物を除去するプリーツ型ろ過装置において、前記ろ過膜を逆洗時の自然逆流を防止するとともに逆洗水を均一に分配させることを特徴とするプリーツ型ろ過装置。 1. A performs filtering processing of the raw water in the membrane of the pleated, filtration surface of the filtration membrane of the pleated backwashing the water passing direction of the backwash water element flowing in the opposite direction of the filtration membrane in pleated filtration device for removing suspension adhering to the pleated filtration apparatus characterized by evenly distributing the backwash water thereby prevent spontaneous reflux during backwashing the filtration membrane.
  2. 【請求項2】ろ過器胴容器を水張りとして、前記プリーツ型ろ過膜の外面に水圧をかけることにより、抵抗を増加させる請求項1に記載のプリーツ型ろ過装置。 2. A method strainer body vessel as a water filling, by applying a pressure to the outer surface of the pleated filtration membrane, pleated filtration device according to claim 1 for increasing the resistance.
  3. 【請求項3】前記ろ過膜の逆洗で、前記プリーツ型ろ過膜が装着される胴容器の水位を変化させ前記プリーツ型ろ過膜の外面の抵抗を変える請求項1に記載のプリーツ型ろ過装置。 In backwash wherein the filtration membrane, pleated filtration apparatus of claim 1, by changing the water level of the body vessel said pleated filtration membrane is attached changing the resistance of the outer surface of the pleated filtration membrane .
JP24014096A 1996-09-11 1996-09-11 Pleated type filter Pending JPH1085566A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24014096A JPH1085566A (en) 1996-09-11 1996-09-11 Pleated type filter

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Application Number Priority Date Filing Date Title
JP24014096A JPH1085566A (en) 1996-09-11 1996-09-11 Pleated type filter

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JPH1085566A true JPH1085566A (en) 1998-04-07

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US8293098B2 (en) 2006-10-24 2012-10-23 Siemens Industry, Inc. Infiltration/inflow control for membrane bioreactor
US8377305B2 (en) 2004-09-15 2013-02-19 Siemens Industry, Inc. Continuously variable aeration
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