JPH09138298A - Filter using hollow-fiber membrane and method for backwashing it - Google Patents

Filter using hollow-fiber membrane and method for backwashing it

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Publication number
JPH09138298A
JPH09138298A JP29807195A JP29807195A JPH09138298A JP H09138298 A JPH09138298 A JP H09138298A JP 29807195 A JP29807195 A JP 29807195A JP 29807195 A JP29807195 A JP 29807195A JP H09138298 A JPH09138298 A JP H09138298A
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Japan
Prior art keywords
fiber membrane
hollow fiber
air
container
liquid
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Pending
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JP29807195A
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Japanese (ja)
Inventor
Seiichi Kazama
Masato Kobayashi
Yoshihiro Shiozawa
義博 塩沢
政人 小林
誠一 風間
Original Assignee
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 JP29807195A priority Critical patent/JPH09138298A/en
Publication of JPH09138298A publication Critical patent/JPH09138298A/en
Application status is Pending legal-status Critical

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Abstract

PROBLEM TO BE SOLVED: To improve the efficiency in backwashing by combining draining methods and liquid levels in backwashing when a hollow-fiber membrane equipped with hollow-fiber membrane modules in a container is backwashed with the air.
SOLUTION: The pressurized air is quickly supplied to a filter tower body container, and a waste liquid from backwashing is drained for a short time. Moreover, the efficiency is improved in the drainage of granular impurities during backwashing by changing liquid levels when the lower air from a lower air intake valve 44 is backwashed to remove residual granular impurities in parts inside the filter tower and interstices between modules by liquid level vibration and combining the high-pressure backwash with the upper air, the low-pressure air backwash with the lower air and the regulation of liquid levels.
COPYRIGHT: (C)1997,JPO

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、原液の濾過処理を行う容器内に複数個の中空糸膜モジュールを設備する中空糸膜フィルタを用いた濾過装置及びその逆洗方法に係り、特に中空糸膜モジュールの逆洗性の高い濾過装置及びその逆洗方法に関する。 BACKGROUND OF THE INVENTION The present invention relates to a filtration apparatus and backwash method using a hollow fiber membrane filter equipment a plurality of hollow fiber membrane module in the vessel to perform the filtration treatment of the stock solution, in particular hollow fiber high filtration apparatus with backwashing of the membrane modules and to a backwashing process.

【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粒子状不純物を分離除去するために用いられている濾過装置として、従来は、粉末イオン交換樹脂等の濾過助材をエレメントにプリコートし、濾過助材プリコート層で粒子状不純物を分離除去するプリコート式フィルタが採用されていたが、近年のプラントでは、濾過助材を使用しない中空糸膜フィルタが採用されるようになってきた。 2. Description of the Related Art As is filtration apparatus used particulate impurities present in the condensate and radioactive waste at nuclear power plants in order to separate off, conventionally, precoating the filter aid material such as powdered ion exchange resin in the element and, although precoating type filter for separating and removing particulate impurities filter aid precoat layer has been adopted, in recent years the plant has become a hollow fiber membrane filter not using filter aid is employed.

【0003】図2は、中空糸膜フィルタの概略構成を示すものである。 [0003] Figure 2 schematically shows the structure of the hollow fiber membrane filter. 濾過処理の必要な原液は、原液供給管1 Required stock solution of filtration process, the stock solution feed pipe 1
1,原液入口弁12,原液濾過塔入口管13を介して濾過塔1に導かれ中空糸膜モジュール2に束ねられている中空糸膜で濾過処理され、処理液濾過塔出口管14,処理液出口弁15,処理液出口管16を経て下流系統に送られる。 1, the stock solution inlet valve 12, is filtration with hollow fiber membrane is guided to the filtration tower 1 via the stock filtration tower inlet pipe 13 are bundled hollow fiber membrane module 2, the treatment liquid filtration tower outlet tube 14, the treatment liquid outlet valve 15 and sent to downstream systems through the processing liquid outlet pipe 16. 中空糸膜で捕捉した粒子状不純物が規定量に達すると中空糸膜の逆洗を行う。 When particulate impurities trapped in the hollow fiber membrane reaches a specified amount perform backwashing of the hollow fiber membrane. 中空糸膜の逆洗は、下部空気供給管41よりの圧縮空気を下部空気減圧弁42で必要圧力に減圧、下部空気供給管43,下部空気入口弁44,下部空気入口管45より供給される低圧空気により中空糸膜を振動させて粒子状不純物を除去する低圧空気逆洗と空気供給管31よりの圧縮空気を前置空気濾過器6で不純物を濾過、上部空気減圧弁33で必要圧力に減圧後、更に空気濾過器7で濾過し、空気貯槽8に貯えられた空気を上部空気供給管37,上部空気入口弁3 Backwashing of the hollow fiber membrane, a reduced pressure compressed air from the lower air supply pipe 41 to the required pressure in the lower air pressure reducing valve 42, the lower air supply pipe 43, the lower air inlet valve 44, is supplied from the lower air inlet pipe 45 filtering impurities compressed air from the low pressure air backwashing an air supply pipe 31 for removing particulate impurities by vibrating the hollow fiber membrane by low-pressure air in front 置空 air filter 6, the required pressure in top air pressure reducing valve 33 after depressurization, further filtered by an air filter 7, the upper air supply pipe 37 the air that has been stored in the air storage tank 8, the upper air inlet valve 3
8,上部空気入口管39より供給される高圧空気により濾過塔1の濾過塔蓋容器1b内に保有する濾過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、これらの一方または両方の組合せにより中空糸膜で捕捉した粒子状不純物を除去する。 8, there is high pressure air backwashing for backwashing the filtration treatment liquid from pumping to the hollow fiber membrane inside to outside held in the filtration tower lid container 1b filtration column 1 by high pressure air supplied from the upper air inlet tube 39, the by one or both of these combinations, captured in the hollow fiber membrane particulate impurities removed. この逆洗に使用された空気のうち、濾過塔胴容器1aに供給された空気は、濾過塔胴ベント管56,濾過塔胴ベント弁57,濾過塔ベント管59を、濾過塔蓋容器1bに供給された空気は、濾過塔上部ベント管61,濾過塔上部ベント弁6 Of the air that has been used in this backwash, the air supplied to the filtration tower cylinder container 1a is filtration tower cylinder vent pipe 56, filtration tower cylinder vent valve 57, a filtration tower vent pipe 59, the filtration tower lid containers 1b the supplied air filtration tower upper vent pipe 61, filtration tower upper vent valve 6
2,濾過塔ベント管59を介して逆洗受タンク9に排気され、また、粒子状不純物を含んだ濾過塔胴容器1a内の保有水は、濾過塔ドレン管51,濾過塔ドレン弁5 2, evacuated to backwash receiving tank 9 via filtration column vent pipe 59, also held water filtration tower drain pipe 51 in the filtration tower body container 1a containing particulate impurities, filtration tower drain valve 5
2,ドレン管53を介して逆洗受タンク9に排出される。 2, and it is discharged to the backwash receiving tank 9 through the drain pipe 53.

【0004】図3は、中空糸膜フィルタの濾過塔構造を示す。 [0004] Figure 3 shows a filtration tower structure of the hollow fiber membrane filter. 濾過塔は、濾過塔胴容器1a,濾過塔蓋容器1b Filtration column, filtration tower body container 1a, filtration tower lid container 1b
とこれらに挟まれた管板3及び逆洗用の空気分散板4, An air distribution plate 4 thereof sandwiched by the tube plate for 3 and backwashing,
各ノズルより構成されており、中空糸膜モジュール2 Is composed from the nozzles, the hollow fiber membrane module 2
は、管板3に吊り下げられている。 It is suspended to the tube plate 3.

【0005】図4は中空糸膜モジュールで特に多段式モジュールの一般的な構造を示す。 [0005] Figure 4 is particularly shows the general structure of multi-stage modules in hollow fiber membrane module. 中空糸膜モジュール2 The hollow fiber membrane module 2
は、外筒70の中に中空糸膜72の上下を接合剤71 It is the upper and lower hollow fiber membrane 72 into the outer cylinder 70 cement 71
A,71B、及び接合剤71C,71Dで接合したものを積み重ねたもので、外筒70には逆洗空気の導入,排気及びモジュール内の逆洗水のドレンの為に開口75 A, 71B, and the bonding agent 71C, in a stack of those bonded at 71D, the introduction of the backwash air into the outer cylinder 70, an opening for the backwash water drainage in the exhaust and the module 75
A,75B,75C,75Dを有している。 Has A, 75B, 75C, and 75D. また、下段モジュールの下部接合剤71Dにはスカート部73からの逆洗用空気をモジュール内に導入する空気溝76を、 Further, the air groove 76 for introducing the backwashing air from the skirt portion 73 in the module to the lower bonding agent 71D of the lower module,
上段モジュールに空気を導入する為の空気連通管77を有している。 It has an air communicating pipe 77 for introducing air into the upper module. 濾過塔の下部空気による逆洗は、濾過塔胴容器1aを満水状態とし、下部空気入口管45より濾過塔胴容器1aに供給された低圧空気を空気分散板4にて分散、各中空糸膜モジュール2下部に集め、一部はモジュール下部のスカート部73より空気溝76を介して下部モジュールへ、上部モジュールへは空気連通管77より、一部は外筒開口75B,75Dよりモジュール内に導かれ、中空糸膜を振動させて中空糸膜にて捕捉した粒子状不純物を中空糸膜から剥離させる。 Backwash by the lower air filtration column, the filtration tower body vessel 1a and filled with water, dispersing the low-pressure air supplied to the filtration tower body vessel 1a from the lower air inlet tube 45 at the air distribution plate 4, each hollow fiber membrane collected in module 2 lower guide part to the lower module via the air grooves 76 from the module lower part of the skirt portion 73, from the air communication tube 77 to the upper module, some of the outer tube openings 75B, in the module than 75D he, to separate the particulate impurities hollow fiber membrane is vibrated by captured by the hollow fiber membrane from the hollow fiber membrane. 剥離した粒子状不純物は濾過塔胴容器1a保有水とともに開口75B, Exfoliated particulate impurities opening 75B with filtration tower body vessel 1a held water,
75Dよりモジュール外へ導かれ濾過塔胴容器1aより濾過塔ドレン弁52を経て逆洗受タンク9に排出される。 It is discharged to the backwash receiving tank 9 through a filtration tower drain valve 52 from being guided to the outside of the module filtration tower body vessel 1a from 75D.

【0006】この場合、特に多段式中空糸膜モジュールにおいて、上記モジュールへ空気が均一に分散されにくいため上段モジュールと下段モジュールとで逆洗効果が異なる懸念があった。 [0006] In this case, especially in a multi-stage hollow fiber membrane module, backwashing effect had different concern the upper module and a lower module for air to the module is difficult to be uniformly dispersed.

【0007】この問題を解決するため、特開昭62−2627 [0007] In order to solve this problem, JP-A-62-2627
10号公報では逆洗水の水位を検出し、最も粒子状不純物が残存している部分に逆洗水の液面を設定し残留している粒子状不純物を除去する方法が開示されている。 The 10 discloses detecting a water level of the backwash water, a method of most particulate impurities set the liquid level of the backwash water to the portion that remains remove particulate impurities remaining is disclosed. この方法によれば、上段モジュールと下段モジュールとで逆洗効果が異なる問題を解決することができる。 According to this method, it is possible to solve the backwash effect different problems in the upper module and a lower module.

【0008】 [0008]

【発明が解決しようとする課題】上記従来技術のような逆洗を施したとしても、濾過塔胴容器1a保有水の排液(ドレン)は重力移送にて排出されるため、一旦中空糸膜モジュールから離れた粒子状不純物が沈降し、濾過塔内及びモジュール内に残留する懸念があった。 [0007] Even subjected to backwash the above prior art, since the drainage filtration tower body vessel 1a held water (drain) is discharged by gravity transfer, once the hollow fiber membranes particulate impurities are precipitated away from the module, there is a concern that remaining in the filtration tower and the module. つまり、 That is,
ドレン排液中の粒子不純物が沈降し、空気分散板4の上部等の塔内部品に堆積したり、モジュールの接合剤71 Precipitated particles impurities in drain effluent is or deposited tower part of the upper or the like of the air distribution plate 4, the module of the bonding agent 71
B,71Dと開口75B,75D及び中空糸膜72の隙間に残留したりする懸念があった。 B, 71D and the opening 75B, there is a concern or to remain in the gap 75D and the hollow fiber membrane 72. このような残留不純物は、通常の濾過動作を開始するとすぐに中空糸膜に再付着するため、逆洗の効果を著しく低下させる。 Such residual impurities, to re-adhere as soon as starting the normal filtration operation the hollow fiber membrane, significantly reduces the effect of the backwashing.

【0009】本発明の目的は、このような逆洗後の粒子微不純物の残留を抑制することにより、中空糸膜モジュールの寿命を長くすることにある。 An object of the present invention, by suppressing the residual particles fine impurities after this backwash is to extend the life of the hollow fiber membrane module.

【0010】 [0010]

【課題を解決するための手段】上記目的を達成するために、逆洗時に逆洗水排液を急速に行うことにより粒子状不純物を浮遊している間にドレンを行う。 To achieve the above object, according to the Invention The performs drain while suspended particulate impurities rapidly performing the backwash water drainage during backwashing. 濾過塔胴容器1aに供給する加圧空気は、濾過塔胴容器1a内保有水を加圧することにより保有水液面を押すように作用し、 Pressurized air is supplied to the filtration tower body vessel 1a acts to push the held water liquid surface by pressurizing the filtration tower body vessel 1a within the retention water,
これにより急速ドレンが可能となり、ドレン時間が短くなるため粒子状不純物が自然沈降する前の浮遊状態で保有水と共に粒子状不純物を濾過塔外に排出できる。 This enables rapid drainage, particulate impurities along with held water in suspension before the particulate impurities since the drainage time is shortened to spontaneous sedimentation can be discharged to the outside of the filtration tower. また逆洗水の急速排出と同時に粒子状不純物の残留し易い部分の洗浄を行うことが効果的である。 Also it is effective to clean the rapid discharge at the same time remaining prone portion of the particulate impurities backwash water. また、多段式中空糸膜モジュール2の上段モジュールと下部モジュールの逆洗方式を変えることも好ましい。 It is also preferable to change the backwash system of the upper module and lower module multistage hollow fiber membrane module 2.

【0011】具体的には、図1において、加圧空気空気貯槽8から加圧空気入口弁47より濾過塔胴容器1aへ供給し、空気加圧にて急速に短時間でドレンする。 [0011] Specifically, in FIG. 1, the pressurized air supplied from the air storage tank 8 to the filtration tower body vessel 1a from the pressurized air inlet valve 47 to drain rapidly in a short time at an air pressure. 中空糸膜モジュールが懸架されている管板は濾過塔蓋容器1 Tubesheet hollow fiber membrane module is suspended is filtered tower lid containers 1
bと濾過塔胴容器1aを濾過液が相互に移動しないように水密構造となっている。 The b and filtration tower cylinder container 1a is filtrate has a watertight structure so as not to move relative to each other. すなわち、濾過塔蓋容器1b In other words, filtration tower lid container 1b
内にある濾過液は中空糸膜モジュール内部から中空糸膜を通らないと濾過塔胴容器1aには達しない。 Filtrate is within does not reach the filtration tower body vessel 1a from the inside the hollow fiber membrane module does not pass through the hollow fiber membranes. 従来の逆洗では、濾過塔蓋容器1b内部にのみ加圧された空気を送り、濾過塔蓋容器1b内にある濾過液を中空糸膜モジュール内部へ強制的に送り込むことによって逆洗を行ってきた。 In the conventional backwashing, the feed was pressurized only pressurized inside the filtration tower lid containers 1b air, have conducted backwash by forcibly feeding it the filtrate in the filtration tower lid container 1b into hollow fiber membrane module It was. 本発明では、濾過塔蓋容器1b内部に加圧された空気を送るとともに、濾過塔胴容器1aにも加圧された空気を送ることによって濾過塔胴容器1a内部の逆洗水排液を急速に排出する。 In the present invention, and sends the pressurized inside the filtration tower lid containers 1b air, rapidly backwash water drainage of the internal filtration tower cylinder container 1a by sending pressurized to the filtration tower body vessel 1a air It is discharged to. 濾過塔胴容器1aに加圧された空気を送る管は管板のできるだけ近くに設置し、濾過塔胴容器1a内部の排液の液面の上方から排液を押し出すようにすることが効果的である。 Tube sends the pressurized filtration tower body vessel 1a air is placed as close as possible to the tube plate, effectively be made to push the drainage from above the liquid surface of the filtration tower body vessel 1a internal drainage it is. 管板の直下に設置することが最も好ましい。 It is most preferably installed immediately below the tubesheet. また濾過塔胴容器は円筒形状であることが多いがその場合は空気を送る管は、濾過塔胴容器の円周部に均等に複数個設けることが好ましい。 The tube is often filtration tower cylinder container is a cylindrical sending the case air is preferably provided equally plurality the circumference of the filtration tower body vessel.

【0012】さらに濾過塔胴容器の下部からの低圧空気の注入によるバブリング(空気の注入により濾過液中に気泡を生じさせ中空糸膜モジュールを振動させること) Furthermore bubbling by injection of low pressure air from the lower portion of the filtration tower cylinder container (vibrating the hollow fiber membrane module causes the bubbles in the filtrate by injecting air)
を同時に行うことにより効果的な逆洗を行うことができる。 It is possible to perform effective backwash by simultaneously. またこの際、濾過塔胴容器1aへの加圧された空気の供給を間欠的にすることにより、特に中空糸膜モジュールの特に粒子状不純物が付着しやすい部分を重点的に逆洗しながら、かつ浮遊している不純物を沈降させないように急速に排出することができる。 Also at this time, by the intermittent supply of the pressurized to the filtration tower body vessel 1a air, while focus backwash especially particular portion where the particulate impurities easily adheres the hollow fiber membrane module, and impurities are suspended can be rapidly eliminated so as not to settle.

【0013】濾過塔胴容器1aの液位を変化させて中空糸膜モジュール2及び濾過塔1内の粒子状不純物が残留し易い部分を液面として下部空気による低圧空気逆洗を行うことにより液面振動が隙間に残留の粒子状不純物を除去するように作用する。 [0013] the liquid by performing the low pressure air backwash by the lower air particulate impurities remain prone portion of the filtration tower cylinder container 1a by changing the liquid level hollow fiber membrane module 2 and filtration tower 1 as the liquid surface surface vibration acts to remove particulate impurities remaining in the gap.

【0014】多段式中空糸膜モジュール2は、低圧空気逆洗では均一な上段モジュール内への空気分離が難しい上段モジュール部まで水抜きを行い高圧空気による中空糸膜72の内側から外側への逆洗を行うことにより上段モジュールの逆洗性を向上させることにより濾過塔の逆洗効率を向上できる。 [0014] multistage hollow fiber membrane module 2, opposite from the inside of the hollow fiber membranes 72 by the high-pressure air perform drainage until air separation is difficult upper module portion into the uniform upper module is low pressure air backwash outward It can be improved backwash efficiency of filtration tower by improving the backwash of the upper module by performing washing.

【0015】 [0015]

【発明の実施の形態】以下、本発明の一実施例を図1により説明する。 BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention by FIG.

【0016】図4に示す中空糸膜モジュール2は、濾過塔胴容器1aと濾過塔蓋容器1bにはさまれた管板3に1個又は複数個吊り下げられている。 The hollow fiber membrane module 2 shown in FIG. 4 is suspended one or more tubesheet 3 sandwiched between filtering tower body vessel 1a filtration tower lid container 1b. 原液は、原液入口弁12,原液濾過塔入口管13を介して濾過塔胴容器1 Stock solution, the stock solution inlet valve 12, filtration tower cylinder vessel 1 through a stock solution filtration tower inlet pipe 13
a内に導かれ、中空糸膜モジュール2内の中空糸膜で濾過処理される。 Led into the a, it is filtration with hollow fiber membranes of the hollow fiber membrane module 2. その処理液は、濾過塔蓋容器1bに集められ、処理液濾過塔出口管14,処理液出口弁15,処理液出口管16を通り下流系統に送られる。 The process liquid is collected in a filtration tower lid containers 1b, treatment liquid filtration tower outlet tube 14, the treatment liquid outlet valve 15 is sent to the processing liquid outlet pipe 16 as a downstream system. 中空糸膜の逆洗は、下部空気入口弁44,下部空気入口管45より供給される低圧空気により中空糸膜72を振動させる低圧空気逆洗と上部空気入口弁38,上部空気入口管39 Backwashing of the hollow fiber membrane, the lower air inlet valve 44, the hollow fiber membrane 72 low pressure air backwash and the upper air inlet valve 38 to vibrate the by the low-pressure air supplied from the lower air inlet pipe 45, the upper air inlet tube 39
より供給される高圧空気により中空糸膜内側から外側へ逆流させる高圧空気逆洗により行い、逆洗に使用された空気は、濾過塔胴ベント管56,濾過塔胴ベント弁58 Performed by high pressure air backwash to flow back from the hollow fiber membrane inside out by high pressure air to be more supply, the air used for backwashing, filtration tower cylinder vent pipe 56, filtration tower cylinder vent valve 58
を介して逆洗受タンク9に排出され、容器内保有水は、 Is discharged to the backwash receiving tank 9 through a vessel held water,
濾過塔ドレン管51,濾過塔ドレン弁52を通って逆洗受タンク9に排出される。 Filtration tower drain pipe 51, and is discharged through the filtration tower drain valve 52 to the backwash receiving tank 9.

【0017】ここで、従来と相違する点は、濾過塔胴容器1aへ圧縮空気供給設備である空気貯槽8からの加圧空気供給系統を設置したことにある。 [0017] Here, the conventional and differences points, in that they have installed pressurized air supply system from the air reservoir 8 is a compressed air supply equipment to the filtration tower body vessel 1a.

【0018】加圧空気供給は、高圧空気逆洗に上部より空気を供給するための空気貯槽8に保有の高圧空気を上部空気供給管37から分岐した加圧空気供給管46,加圧空気入口弁47,加圧空気入口管48を経て濾過塔胴容器1aに供給する。 The pressurized air supply, the high pressure air to the upper air supply pipe 37 pressurized air supply pipe 46 branched from holdings in the air storage tank 8 for supplying air from the upper to the high pressure air backwash, pressurized air inlet the valve 47 is supplied to the filtration tower body vessel 1a via a pressurized air inlet tube 48. このとき、濾過塔保有水を急速に加圧ドレンするため加圧空気入口弁47及び濾過塔ドレン弁52、またはいずれか一方は、急速な開操作が可能なような弁仕様とする。 At this time, filtration tower possess water rapidly pressurized drain to for pressurized air inlet valve 47 and filtration column drain valve 52 or either, the rapid opening operation and the valve specifications as possible.

【0019】濾過塔の逆洗は、濾過塔胴容器1a下部の下部空気入口弁44,下部空気入口管45より供給する低圧空気を空気分散板4で各中空糸膜モジュール2に集め、中空糸膜の外側の気泡により膜を振動させ膜外面で捕捉の粒子状不純物を除去する。 The backwash of the filtering tower, filtration tower body vessel 1a lower portion of the lower air inlet valve 44, the low pressure air supplied from the lower air inlet pipe 45 collected in the air distribution plate 4 into the hollow fiber membrane module 2, the hollow fiber the outer bubble film removing particulate impurities trapped in the membrane outer surface to vibrate the membrane. 下部空気による低圧空気逆洗後、直ちに加圧空気入口弁47及び濾過塔ドレン弁52を急速開として濾過塔保有水を粒子状不純物が沈降する前の浮遊状態で短時間に濾過塔上部からの加圧空気でドレンする。 After low pressure air backwash by the lower air immediately pressurized air inlet valve 47 and a filtration tower held water from the filtration tower top a short time before the floating state in which the particulate impurities settle the filtration tower drain valve 52 as quickly opens to drain in the pressurized air.

【0020】ここで、加圧空気入口弁47を通常の動作として加圧空気入口弁47を開後、濾過塔ドレン弁52 [0020] Here, Hirakigo the pressurized air inlet valve 47 of the pressurized air inlet valve 47 as a normal operation, filtration tower drain valve 52
を急速開、または濾過塔ドレン弁52を通常開動作とし加圧空気入口弁47を急速開する操作でも同様の効果が得られる。 Rapid opening, or similar effects can be obtained a filtration tower drain valve 52 in the normal opening operation and then rapidly opening operation the pressurized air inlet valve 47.

【0021】本発明は、中空糸膜モジュールの下部空気逆洗後の粒子状不純物を含む濾過塔胴容器1a保有水を急速に排出することにより不純物の排出性の向上が図れる等の効果がある。 [0021] The present invention has an effect such as can be improved discharge of impurities by discharging the filtration tower body vessel 1a held water containing particulate impurities after the lower air backwash the hollow fiber membrane module rapidly .

【0022】図5及び図6は、中空糸膜モジュール2の低圧空気逆洗時の液位を変えて液面の振動により逆洗する実施例である。 [0022] Figures 5 and 6 are examples which backwashing by the vibration of the hollow fiber membrane module liquid level by changing the liquid level of the low-pressure air backwashing 2. まず、濾過塔胴容器1a満水で下部空気より膜を振動させる逆洗を実施した後、例えば図5に示すモジュールの開口75B近傍まで水抜きを実施する。 First, after performing the backwash for vibrating the membrane from the lower air filtration tower body vessel 1a full water, carrying out the drain to the vicinity of the opening 75B of the module shown in FIG. 5, for example. この液位で下部空気入口弁44を開として低圧空気を濾過塔胴容器1aに供給し、液面振動によりモジュール接合剤71Bと中空糸膜72,開口75Bの隙間に残留する粒子状不純物を除去する。 The low-pressure air is supplied to the filtration tower body vessel 1a in the liquid level of the lower air inlet valve 44 is opened, the module bonding agent 71B and the hollow fiber membrane 72 by melt vibration, remove particulate impurities remaining in the gap of the opening 75B to. 続けて、図6に示すモジュールの開口75D近傍まで水抜きを実施し、同様に低圧空気を供給してモジュール接合剤71Dと中空糸膜72,開口75Dの隙間に残留する粒子状不純物を液面振動により除去する。 Subsequently, the water draining was carried out to the vicinity of the opening 75D of the module shown in FIG. 6, as to supply low pressure air module bonding agent 71D and the hollow fiber membrane 72, the liquid surface of the particulate impurities remaining in the gap of the opening 75D It is removed by vibration. 必要に応じて、更に空気分散板4 If necessary, further air distribution plate 4
近傍まで水抜きを行い、空気分散板4上部に滞留する粒子状不純物を低圧空気による液面振動で除去することにより逆洗効果の向上を図ることができる。 Performed drained to the vicinity, it is possible to improve the backwash effect by removing particulate impurities remaining in the fourth upper air distribution plate at the liquid surface vibration by the low-pressure air.

【0023】図7は、中空糸膜モジュール2の逆洗効率向上の実施例である。 FIG. 7 is an embodiment of a backwash efficiency of the hollow fiber membrane module 2. 図4に示すモジュール構造で、低圧空気逆洗時の空気は、下段モジュールではスカート部73に集められた空気が空気溝76を通り下段モジュールに集められるが、上段モジュールについては、下段からの連通管77を介して導入されるため空気の分散性の点で均等に空気が分散せずに、特に接合剤71Bの中空糸膜結束部に粒子状不純物が残留する懸念があった。 In the module structure shown in FIG. 4, the air at the time of low pressure air backwash, although air collected in the skirt portion 73 is collected air grooves 76 as lower modules in the lower module, for upper module, communicating from the lower equally in terms of dispersibility of the air to be introduced through the tube 77 without air dispersed, particulate impurities was concern remaining particularly hollow fiber membrane binding portion of the bonding agent 71B. このため、上段モジュールについては、図7に示す中空糸膜モジュール2の中間部まで水抜きを行い、上部空気での高圧空気による中空糸膜72の内側から外側への逆洗を行うようにしたものである。 Therefore, for the upper module performs drained to the middle portion of the hollow fiber membrane module 2 shown in FIG. 7, and from the inside of the hollow fiber membranes 72 by the high-pressure air in the upper air to perform the backwash outward it is intended. つまり、上部空気入口弁38を開として蓋容器1b内保有水を空気加圧により膜の内側から外側に逆流させる高圧空気逆洗の際、下段モジュールは濾過塔胴容器1a保有水中にあるため中空糸膜72の外面の抵抗が大きいため、逆流水は大気に開放されている上段モジュールの部分を主体に逆流することになり、上段モジュールの逆洗効率を向上させることになる。 That is, when the upper air inlet valve 38 within the retention water-lid container 1b from the inside of the membrane by an air pressurization as opening of the high pressure air backwash to flow back into the outer, hollow since the lower module in the filtration tower body vessel 1a held water because the outer surface of the resistance of the fiber membrane 72 is large, back flow water will be flowing back into the main part of the upper module that is open to the atmosphere, will improve the backwash efficiency of the upper module.

【0024】 [0024]

【発明の効果】本発明によれば、中空糸膜モジュール逆洗後の粒子状不純物を含む廃液を急速に排出し、また、 According to the present invention, a waste liquid containing particulate impurities after the hollow fiber membrane module backflushing rapidly discharged, also,
濾過塔の液位を変えて隙間部を空気による液面振動させることにより粒子状不純物の排出性をよくすることにより逆洗効率の向上が図れる。 The gap portion by changing the level of the filtration tower can be improved backwash efficiency by improving the discharge of particulate impurities by melt vibration by air.

【0025】また、中空糸膜モジュールの上段モジュールを上部空気による高圧空気逆洗とすることにより上段モジュールの逆洗性を改善し、逆洗効率の向上が図れる。 Further, the upper module of the hollow fiber membrane module to improve the backwash of the upper module by a high pressure air backwash by the upper air, thereby improving the backwash efficiency.

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

【図1】中空糸膜フィルタの加圧空気系統を設置した系統図。 [1] system diagram installed pressurized air system of the hollow fiber membrane filter.

【図2】中空糸膜フィルタの従来系統図。 [2] Conventional system diagram of a hollow fiber membrane filter.

【図3】中空糸膜フィルタの構造図。 [3] Structure view of a hollow fiber membrane filter.

【図4】中空糸膜モジュールの構造図。 [4] Construction of the hollow fiber membrane module.

【図5】中空糸膜フィルタの逆洗時液位を示した構造図1。 [5] structure showed backwash when liquid level of the hollow fiber membrane filter Figure 1.

【図6】中空糸膜フィルタの逆洗時液位を示した構造図2。 [6] structures showed backwash when liquid level of the hollow fiber membrane filter Figure 2.

【図7】中空糸膜フィルタの逆洗時液位を示した構造図3。 [7] structures showed backwash when liquid level of the hollow fiber membrane filter Figure 3.

【符号の説明】 DESCRIPTION OF SYMBOLS

1…濾過塔、1a…濾過塔胴容器、1b…濾過塔蓋容器、2…中空糸膜モジュール、3…管板、4…空気分散板、6…前置空気濾過器、7…空気濾過器、8…空気貯槽、9…逆洗受タンク、11…原液供給管、12…原液入口弁、13…原液濾過塔入口管、14…処理液濾過塔出口管、15…処理液出口弁、16…処理液出口管、2 1 ... filtration tower, 1a ... filtration tower body vessel, 1b ... filtration tower lid containers, 2 ... hollow fiber membrane module, 3 ... tubesheet, 4 ... air dispersion plate, 6 ... front 置空 air filter, 7 ... air filter , 8 ... air reservoir, 9 ... backwash receiving tank, 11 ... solution feed pipe, 12 ... concentrate inlet valve, 13 ... concentrate filtration tower inlet pipe, 14 ... treatment liquid filtration tower outlet pipe, 15 ... treatment liquid outlet valve, 16 ... treatment liquid outlet pipe, 2
1…補給水供給管、22…補給水入口弁、23…補給水入口管、31…空気供給管、32,34,36,37… 1 ... makeup water supply pipe, 22 ... makeup water inlet valves, 23 ... up water inlet pipe, 31 ... air supply pipe, 32,34,36,37 ...
上部空気供給管、33…上部空気減圧弁、38…上部空気入口弁、39…上部空気入口管、41,43…下部空気供給管、42…下部空気減圧弁、44…下部空気入口弁、45…下部空気入口管、46…加圧空気供給管、4 Upper air supply pipe, 33 ... upper air pressure reducing valve, 38 ... upper air inlet valve, 39 ... upper air inlet pipe, 41, 43 ... lower air supply pipe, 42 ... lower air pressure reducing valve, 44 ... lower air inlet valve, 45 ... the lower air inlet tube, 46 ... pressurized air supply pipe, 4
7…加圧空気入口弁、48…加圧空気入口管、51…濾過塔ドレン管、52…濾過塔ドレン弁、53…ドレン管、56,58…濾過塔胴ベント管、57…濾過塔胴ベント弁、59…濾過塔ベント管、61…濾過塔上部ベント管、62…濾過塔上部ベント弁、70…外筒、71 7 ... pressurized air inlet valve, 48 ... compressed air inlet pipe, 51 ... filtration tower drain pipe, 52 ... filtration tower drain valve, 53 ... drain pipe, 56, 58 ... filtration tower cylinder vent tube, 57 ... filtration tower cylinder vent valve, 59 ... filtration tower vent tube, 61 ... filtration tower upper vent tube, 62 ... filtration tower upper vent valves, 70 ... outer cylinder, 71
A,71B,71C,71D…接合剤、72…中空糸膜、 A, 71B, 71C, 71D ... cement, 72 ... hollow fiber membrane,
73…スカート部、75A,75B,75C,75D…開口、76…空気溝、77…連通管。 73 ... skirt section, 75A, 75B, 75C, 75D ... opening, 76 ... air groove 77 ... communicating pipe.

フロントページの続き (72)発明者 小林 政人 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 Kobayashi Hitachi City, Ibaraki Prefecture Masato Saiwaicho Third Street No. 1 No. 1 stock company Hitachi, Ltd. Hitachi in the factory

Claims (5)

    【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、 該容器内に1個以上の中空糸膜モジュールを懸架し、かつ該容器を相互に水が連通しないように2室に分離する機能を有する管板を装備し、 該中空糸膜モジュール外側より該原液を通過させ、該中空糸膜モジュール内の中空糸膜外面に粒子状不純物を捕捉する濾過装置において、 前記容器の前記中空糸膜モジュールを懸架する側の管板の側近に、加圧空気を供給する管を設けることを特徴とする濾過装置。 And 1. A container body having a stock solution inlet and the treatment liquid outlet, suspended one or more hollow fiber membrane modules within the container, and another water is separated into two chambers so as not to communicate the container equipped with a tube sheet having a function passes a stock solution from the hollow fiber membrane module outward, in the filtration device to trap particulate impurities in the hollow fiber membrane outer surface of the hollow fiber membrane module, the hollow fiber of the container aides side of the tube sheet for suspending the membrane module, the filtration device characterized by providing a pipe for supplying pressurized air.
  2. 【請求項2】原液入口と処理液出口を有する容器本体と、 該容器内に1個以上の中空糸膜モジュールを懸架し、かつ該容器を相互に水が連通しないように2室に分離する機能を有する管板を装備し、 該中空糸膜モジュール外側より該原液を通過させ、該中空糸膜モジュール内の中空糸膜外面に粒子状不純物を捕捉する濾過装置の捕捉した不純物を除去する逆洗方法において、 前記容器中の液体の液面より上方から加圧空気を注入し、前記容器中の液体の排出を加速することを特徴とする濾過装置の逆洗方法。 2. A container body having a stock solution inlet and the treatment liquid outlet, suspended one or more hollow fiber membrane modules within the container, and another water is separated into two chambers so as not to communicate the container Conversely equipped with a tube plate having a function passes a stock solution from the hollow fiber membrane module outward to remove captured impurities filtration device to trap particulate impurities in the hollow fiber membrane outer surface of the hollow fiber membrane module in washing method, by injecting pressurized air from above the level of the liquid in said vessel, backwash method of filtration device, characterized in that to accelerate the discharge of liquid in the container.
  3. 【請求項3】請求項2において、加圧空気の注入を間歇的に行うことを特徴とする濾過装置の逆洗方法。 3. The method of Claim 2, backwashing method of filtration device and performs the injection of pressurized air intermittently.
  4. 【請求項4】原液入口と処理液出口を有する容器本体と、 該容器内に1個以上の中空糸膜モジュールを懸架し、かつ該容器を相互に水が連通しないように2室に分離する機能を有する管板を装備し、 該中空糸膜モジュール外側より該原液を通過させ、該中空糸膜モジュール内の中空糸膜外面に粒子状不純物を捕捉する濾過装置の捕捉した不純物を除去する逆洗方法において、 前記容器中の液体の液面より上方から加圧空気を注入し、前記容器中の液体の排出を加速すると同時に、前記液体中に空気を注入し前記液体をバブリングすることを特徴とする濾過装置の逆洗方法。 4. A stock solution inlet and a container body having a process fluid outlet, suspended one or more hollow fiber membrane modules within the container, and another water is separated into two chambers so as not to communicate the container Conversely equipped with a tube plate having a function passes a stock solution from the hollow fiber membrane module outward to remove captured impurities filtration device to trap particulate impurities in the hollow fiber membrane outer surface of the hollow fiber membrane module in washing process, characterized in that said pressurized air is injected from above the level of the liquid in the container, at the same time accelerate the discharge of the liquid in the container, bubbling the liquid injecting air into the liquid backwashing method of filtration device to.
  5. 【請求項5】請求項4において、前記容器の前記中空糸膜モジュールを懸架しない側にも加圧空気の注入を行い、該容器内の液体を前記中空糸膜の内側から外側に逆流させる操作を同時に行うことを特徴とする濾過装置の逆洗方法。 5. The method of claim 4, performs the hollow fiber membrane also injection of compressed air modules on the side which is not suspended in the vessel, thereby backflow of liquid within said vessel from the inside of the hollow fiber membrane on the outside operation backwashing method of filtration device, characterized in that simultaneously.
JP29807195A 1995-11-16 1995-11-16 Filter using hollow-fiber membrane and method for backwashing it Pending JPH09138298A (en)

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US7025885B2 (en) 1998-11-23 2006-04-11 Zenon Environmental Inc. Water filtration using immersed membranes
JP2006272200A (en) * 2005-03-30 2006-10-12 Toyobo Engineering Kk Method for operating emergency water purifying apparatus and emergency water purifying apparatus using it
JP2007167779A (en) * 2005-12-22 2007-07-05 Daicel Chem Ind Ltd Method for treating waste water
JP2007330916A (en) * 2006-06-16 2007-12-27 Fuji Electric Holdings Co Ltd Water treatment method of hollow fiber membrane and water treatment apparatus
WO2009008386A1 (en) * 2007-07-06 2009-01-15 Mitsubishi Rayon Engineering Co., Ltd. Operating method of water purifier
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US8241496B2 (en) * 2008-08-18 2012-08-14 Kyosan Denki Co., Ltd. Filter device and method of producing the same
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
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
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US7025885B2 (en) 1998-11-23 2006-04-11 Zenon Environmental Inc. Water filtration using immersed membranes
JP2009045623A (en) * 2001-08-09 2009-03-05 Siemens Water Technologies Corp Membrane module cleaning method
US8268176B2 (en) 2003-08-29 2012-09-18 Siemens Industry, Inc. Backwash
US8377305B2 (en) 2004-09-15 2013-02-19 Siemens Industry, Inc. Continuously variable aeration
JP2006272200A (en) * 2005-03-30 2006-10-12 Toyobo Engineering Kk Method for operating emergency water purifying apparatus and emergency water purifying apparatus using it
JP2007167779A (en) * 2005-12-22 2007-07-05 Daicel Chem Ind Ltd Method for treating waste water
JP2007330916A (en) * 2006-06-16 2007-12-27 Fuji Electric Holdings Co Ltd Water treatment method of hollow fiber membrane and water treatment apparatus
US8293098B2 (en) 2006-10-24 2012-10-23 Siemens Industry, Inc. Infiltration/inflow control for membrane bioreactor
US9764288B2 (en) 2007-04-04 2017-09-19 Evoqua Water Technologies Llc Membrane module protection
US8287743B2 (en) 2007-05-29 2012-10-16 Siemens Industry, Inc. Membrane cleaning with pulsed airlift pump
US8372276B2 (en) 2007-05-29 2013-02-12 Siemens Industry, Inc. Membrane cleaning with pulsed airlift pump
US8840783B2 (en) 2007-05-29 2014-09-23 Evoqua Water Technologies Llc Water treatment membrane cleaning with pulsed airlift pump
WO2009008386A1 (en) * 2007-07-06 2009-01-15 Mitsubishi Rayon Engineering Co., Ltd. Operating method of water purifier
JP5280204B2 (en) * 2007-07-06 2013-09-04 三菱レイヨン株式会社 Operation method of water purification equipment
US8382981B2 (en) 2008-07-24 2013-02-26 Siemens Industry, Inc. Frame system for membrane filtration modules
US8241496B2 (en) * 2008-08-18 2012-08-14 Kyosan Denki Co., Ltd. Filter device and method of producing the same
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
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US9962865B2 (en) 2012-09-26 2018-05-08 Evoqua Water Technologies Llc Membrane potting methods
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US10427102B2 (en) 2013-10-02 2019-10-01 Evoqua Water Technologies Llc Method and device for repairing a membrane filtration module
US10322375B2 (en) 2015-07-14 2019-06-18 Evoqua Water Technologies Llc Aeration device for filtration system
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