JPH07132213A - Membrane filtration method and membrane filter - Google Patents

Membrane filtration method and membrane filter

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Publication number
JPH07132213A
JPH07132213A JP20254993A JP20254993A JPH07132213A JP H07132213 A JPH07132213 A JP H07132213A JP 20254993 A JP20254993 A JP 20254993A JP 20254993 A JP20254993 A JP 20254993A JP H07132213 A JPH07132213 A JP H07132213A
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water
filtration
membrane
water level
raw water
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JP20254993A
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Japanese (ja)
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Giichi Ito
義一 伊藤
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Ebara Corp
株式会社荏原製作所
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Priority to JP20254993A priority Critical patent/JPH07132213A/en
Publication of JPH07132213A publication Critical patent/JPH07132213A/en
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Abstract

PURPOSE:To cope with variations in the inflow of raw water without requring complicated control and expensive equipment in a membrane filtration method obtained by differences in water level by obtaining the fixed flow rate of treated water with the water level in a treating tank baing changed corresponding to a change in the filtration resistance of a membrane. CONSTITUTION:An MF membrane module 3 is installed in the bottom part of a filter tank 1, and a raw water storing space 12 occupies the upper part of the filter tank. The filter tank 1 whose upper part is opened is provided with a raw water pipe 6 and an in-tank water level detecting electrode 9, and an outflow pipe 7 communicating with a treated water tank 2 through the MF membrane 3 below in the upper and lower parts respectively. In the raw water pipe 6, a raw water valve 4 for controlling the inflow of raw water and a raw water flowmeter 5 are provided, and in the outflow pipe 7, an outflow valve 8 for turning on an off the outflow of treated water is provided. In this filtration method, only by opening the raw water valve 4, driving force for passing raw water through the MF membrane 3 is caused by difference in water level between the filter tank 1 and the treated water tank 2. The water level is changed from 10 to 11 with the in filtration resistance to always assure a pressure corresponding to the filtration resistance.

Description

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

【0001】 [0001]

【産業上の利用分野】本発明は、上水、用水、廃水または河川浄化等の水処理に適用するろ過処理技術に関し、 The present invention relates to a water supply, water relates to filtration techniques to be applied to water treatment, such as waste water or clean river,
特に定流量での精密ろ過膜ろ過処理技術に関する。 Particularly to microfiltration membrane filtration processing techniques at a constant flow rate.

【0002】 [0002]

【従来の技術】従来、開放槽に外圧型精密ろ過膜(MF Conventionally, external pressure type microfiltration membrane in an open tank (MF
膜という)を浸漬させた膜ろ過装置において、定流量の処理、すなわちろ過される処理水の水量が常に一定量である処理、を行うためには、吸引側に装置を付設し、例えば吸引ポンプであれば回転数や弁開度による制御、あるいは定流量弁の設置、または容積ポンプによる吸引方式等が採られている。 In membrane filtration apparatus is immersed) of films, the processing of the constant flow rate, i.e. for processing, is always constant weight water of the treated water to be filtered, the device was attached to the suction side, for example a suction pump control of the rotational speed and the valve opening degree as long as, or installation of the constant flow valve, or suction method according to displacement pump or the like is adopted. すなわち以下の図3〜図6に示したように、開放型のろ過槽1内に外圧型精密ろ過膜3を置き、ろ過槽1に原水管6から原水を供給し、原水をろ過膜3でろ過し処理水流出管7から流出させる膜ろ過装置において、 例えば、i)容量ポンプによる吸引方式を用いる定流量の処理は、図3に示すように、ろ過膜3の内側に連通した容量ポンプ13により定量吸引する定流量処理であるが、容量ポンプは通常のポンプに比べて高価であり、必要な動力が大きくなる。 That is, as shown in FIGS. 3 to 6 below, place the external pressure type microfiltration membrane 3 to open the filtration tank 1, the raw water supply from the raw water pipe 6 in the filtration tank 1, the raw water in filtration membrane 3 in membrane filtration unit to flow out from the filtered treated water outlet pipe 7, for example, i) volume processing constant flow using a suction system by a pump, as shown in FIG. 3, displacement pump 13 which communicates with the inside of the filtration membrane 3 is a constant flow process for quantifying sucked by, displacement pumps are more expensive than conventional pumps, the required power increases. またii)吸引ポンプの回転数制御を用いる定流量の処理は、図4に示すように、処理水配管に流量計15を設置し、処理ポンプ14の回転数を制御し定流量とする。 The ii) treatment of the constant flow rate using a rotational speed control of the suction pump, as shown in FIG. 4, a flow meter 15 installed in the process water pipe to control the rotational speed of the processing pump 14 to a constant flow rate. さらにまた、iii )弁の開度による制御を用いる定流量の処理は、図5に示すように、処理水配管に流量計15 Furthermore, the processing of the constant flow rate using a control by opening of iii) valve, as shown in FIG. 5, the flow meter 15 in process water pipe
を設置し、定流量になるように制御弁16の開度を制御し定流量とする。 It was placed, and a constant flow rate by controlling the opening degree of the control valve 16 so that the constant flow rate. さらにまた、iv)定流量弁の設置する方法による定流量の処理は、図6に示すように、ろ過槽1と処理水槽2の水位差を利用し、定流量になるように定流量弁18を設置する。 Furthermore, iv) treatment of the constant flow rate by a method of installing the constant flow valve, as shown in FIG. 6, the filter tank 1 and the processing using the water level difference between the water tub 2, the constant flow rate valve so that a constant flow rate 18 the installation.

【0003】上記の従来方式では、定流量の処理を行うために、複雑な制御が必要であったり、高価な機器の設置を必要とした。 [0003] In the above conventional method, for processing of the constant flow, because it involves complicated control required the installation of expensive equipment. 上記iv)の定流量弁18の設置する方法による定流量の処理は、複雑な制御を必要としない。 Processing of the constant flow rate by the method of installation of the constant flow valve 18 described above iv) does not require a complicated control.
しかし、定流量弁を使用するために定流量弁の作動のために圧力損失が生じ、水位差が有効に利用できない。 However, the pressure loss due to the operation of the constant flow valve in order to use the constant flow valve occurs, it can not be utilized effectively water level difference. すなわち、槽内水位が低下して水位差がある値より小さくなった場合定流量弁による圧力損失のために処理水が得られなくなり処理を停止しなければならなくなる。 That will have to stop the treatment water obtained no longer processed for pressure loss due to the constant flow valve when the intracisternal water level falls below a certain value level difference decreases. このように、定流量弁の設置する方法による定流量の処理では、原水流入量に多少の変動があった場合、定流量弁の設置による処理流量一定化であるため、ろ過槽(膜浸漬槽あるいは処理槽ともいう)内での水バランスが崩れ、 Thus, at a constant flow rate of the processing by the method of installation of the constant flow valve, if there is some variation in the raw water inflow amount, since the processing flow constant of by installation of the constant flow valve, filtration tank (membrane immersion tank or also referred to as treatment tank) water balance collapses within,
処理を停止または処理流量より常時大きな流量を流入させ、膜浸漬槽内の原水をオーバーフローさせることになる。 Processing allowed to flow into high flow rate at all times than the stop or process flow, would cause overflow the raw water of the membrane immersion tank.

【0004】 [0004]

【発明が解決しようとする課題】本発明の課題は、水位差を利用した吸引方式で、水位差を最大限に利用する膜ろ過方法である。 OBJECTS OF THE 0008] The present invention is a suction method using the water level difference, a membrane filtration method using a water level difference to the maximum. また、本発明の課題は、上記のような複雑な制御や高価な機器を必要とせず、また原水流入量の変動に対応できる膜ろ過装置である。 Another object of the present invention does not require complex control and expensive equipment as described above, also a membrane filtration apparatus that can correspond to variation of the raw water inflow.

【0005】 [0005]

【課題を解決するための手段】本発明は膜ろ過抵抗の増大に相当して、自然平衡的に外圧を調整するものであって、前記課題は、本発明の膜ろ過方法によって達成される。 The present invention SUMMARY OF] is equivalent to an increase in membrane filtration resistance been made to adjust the natural equilibrium to external pressure, it said object is achieved by membrane filtration method of the present invention. すなわち、 (1)外圧型精密ろ過膜モジュールの透過に要する圧力を処理槽内の原水の水位と処理水の流出水位との水位差によって得る膜ろ過方法において、膜のろ過抵抗の変化に相当して処理槽内水位が変化することにより定流量処理水を得ることを特徴とする膜ろ過方法。 That is, (1) in the membrane filtration method for obtaining the water level difference between the outlet water level of the raw water level and treated water of a pressure required for the transmission of the external pressure type microfiltration membrane module processing tank corresponds to the change in the filtration resistance of the film membrane filtration method characterized by obtaining the constant flow treated water by the treatment tank water level changes Te. (2)前記外圧型精密ろ過膜モジュールの透過に要する圧力を水位差によって得る膜ろ過方法において、膜のろ過抵抗の変化を処理槽内水位により計測して調整することを特徴とする上記(1)に記載の膜ろ過方法。 (2) In the membrane filtration method for obtaining the water level difference pressure required for transmission of the external pressure type microfiltration membrane module, above, wherein the adjusting is measured by processing bath water level changes in the filtration resistance of the membrane (1 membrane filtration method described in). であり、 It is in,

【0006】上記自然平衡型の膜ろ過方法は以下のろ過装置によって実現される。 [0006] Membrane filtration method of the natural balanced is achieved through the following filtration device. すなわち、 (3)処理槽内に外圧型精密ろ過膜モジュールを配置し、該処理槽内水位よりも低い位置に処理水を流出させる処理水流出管を備え、前記ろ過膜モジュールを前記処理槽底部に配置し、原水供給管に流量調節手段を配置し、前記ろ過膜モジュールの上方にろ過に必要な差圧相当の貯水空間を保持すると共に原水水位計測及び流入調整手段を設けた膜ろ過装置、又は、(4)処理槽内に外圧型精密ろ過膜モジュールを配置し、該ろ過膜モジュールと前記処理槽の水位よりも低い位置に配置した処理水槽を連通する連通管と前記処理水槽より処理水を流出させる処理水流出管を備えた膜ろ過装置において、前記ろ過膜モジュールを前記処理槽底部に配置し、原水供給管に流量調節手段を配置し、前記ろ過膜モジュールの上方にろ過に必 That is, (3) processing to place the external pressure type microfiltration membrane module in the vessel, comprises a treated water outlet pipe for discharging the treated water to a position lower than the treatment tank water level, the filtration membrane module the processing bath bottom arranged, a flow control means disposed in the raw water supply tube, membrane filtration apparatus provided with a raw water level measurement and inflow adjusting means holds the water storage space of the differential pressure corresponds required filtration above the filtration membrane module, or, (4) processing to place the external pressure type microfiltration membrane module tank, the filtration membrane module and the processing bath treated water from the treating tank and the communicating pipe that communicates the process water tank which is disposed at a position lower than the water level of the in membrane filtration apparatus having a treated water outlet pipe to flow out, the filtration membrane module is disposed in the processing tank bottom, a flow control means disposed in the raw water supply tube, 必 the filtration above the filtration membrane module 要な差圧相当の貯水空間を保持すると共に原水水位計測及び流入調整手段を設けた膜ろ過装置である。 A membrane filtration apparatus provided with a raw water level measurement and inflow adjusting means holds the water storage space of a main differential pressure corresponds.

【0007】本発明の膜ろ過方法及び膜ろ過装置においては、例えば処理槽に原水水位計測手段を置いて原水の水位を監視すれば膜のろ過抵抗の変化がわかる。 [0007] In the membrane filtration method and a membrane filtration device of the present invention, for example, change in filtration resistance of the membrane by monitoring the water level of the treatment tank raw water at a raw water level measurement means is known. 膜のろ過抵抗が上がって原水の水位が上昇気味であっても、通常は自然にある上昇した原水水位で安定するが、場合によっては原水流入調整手段等で調節しても良い。 Also the water level in the filtering resistance is increased raw water film is a rising feeling, usually becomes stable at elevated raw water in its natural, it may be adjusted by water inlet adjusting means, or the like in some cases.

【0008】また、(5)前記(4)に記載の本発明の膜ろ過装置において、処理水槽はろ過膜モジュール上端より上に貯水位を保持する位置に設けられる膜ろ過装置とすることで処理が一層安定化する。 [0008] (5) In the above membrane filtration device of the present invention described in (4), the process water tank is treated by membrane filtration device provided in a position to hold the reservoir water level above the filtration membrane module upper There is further stabilized. 本発明において重要なことは、ろ過膜のろ過抵抗があまり大きくならない時点では、処理槽の貯水位が相当の貯水空間を保持できる水位であって、ろ過抵抗が大きくなっても貯水位が高くなることによって一定の処理水の流出を確保できることである。 It is important in the present invention, at the time when the filtration resistance of the filtration membrane does not become too large, a water level reservoir water level of the processing tank can hold considerable water space, reservoir water level rises even filtration resistance increases it is to be secured to the outflow of a certain treatment water by. これにより、長期間膜の洗浄や交換をしなくても良い。 As a result, it may not be the cleaning or replacement of the long-term membrane. また、(6)前記連通管に、少なくとも真空ポンプならびに真空配管を連結してサイホン装置を形成した前記(3)または(4)に記載の膜ろ過装置とすることができる。 Further, (6) the the communicating pipe may be a membrane filtration apparatus according to the formation of the siphon device and connecting at least a vacuum pump and vacuum pipe (3) or (4). これは前記連通管中を常に満水に保つための手段である。 This is a means for keeping always fully filled in the communicating pipe.

【0009】本発明において、ろ過膜モジュールに連通する処理水流出管や該ろ過膜モジュールと処理水槽とを結ぶ連通管中が常に処理水で満たされていることは重要なことである。 [0009] In the present invention, it is important that in a communicating pipe connecting the treated water outlet pipe and the filtration membrane module and process water tank which communicates with the filtration membrane module is always filled with treated water. またこの連通管にはポンプや弁など処理水の流出の抵抗となるものがないことも重要なことである。 Further it is also important that nothing the resistance of outflow of treated water, such as pumps and valves for this communication pipe. この処理水流出管や連通管内が常に処理水で満たされておれば、自然に常にろ過抵抗に見合った水位差が生まれ(処理槽中の原水の水位が自然に定まり)膜ろ過が行われるのである。 If I The treated water outlet pipe and communicating pipe is always filled with treated water, so naturally always level difference commensurate with the filtration resistance is born (the water level of the raw water treatment vessel is spontaneously Sadamari) is performed membrane filtration is there. 更に、処理水槽からの処理水流出口が本発明の位置であれば、その途中における連通管等管の位置がたとえ処理槽内水位よりも上にあっても良いので、配管上の便宜や処理槽内水の水位変動への対応が容易であるという効果を有する。 Furthermore, if the position of the processing water outlet from the process water tank present invention, since good even above the though treatment tank water level position of the communication pipe or the like pipe in the middle, convenience and the processing tank on the pipe It has the effect that the corresponding is easy to internal waters water level fluctuations.

【0010】連通管中に気泡があっても連通管がろ過膜モジュールの流出管から処理水槽水位まで単調に下り勾配が保たれておれば処理水の流出が切れることはない。 [0010] communicating pipe is never expires monotonically outflow of treated water if I down slope is maintained until the process water tank water level from the outflow pipe of the filtration membrane module even when air bubbles in the communicating pipe.
また上記したように定流量弁のような弁が存在しても処理水は流出する。 Also treated water exist valves, such as constant flow valve as described above flows out. しかし、このような事態は連通管中に抵抗が生じたことになり、定常的な流出が乱され、原水流入量に多少の変動があった場合など膜浸漬槽内での水バランスが崩れることになる。 However, this situation will be resistance occurs during communication pipe, steady outflow is disturbed, raw water inflow to some water balance in the film immersion bath, such as when there is a variation in collapses become.

【0011】本発明において、ろ過膜モジュールの浸漬されている処理槽と処理水の処理水槽が離れて設置されていて、その間連結する連通管が一旦上昇する部分があり、処理槽の水位より上になることもあるが構わない。 [0011] In the present invention, have been placed apart submerged in a processing tank and treated water treatment water tank of the filtration membrane module, there is a part where the communicating pipe is temporarily increased for connecting therebetween, above the water level in the treatment tank also there but it may be in.
そのような場合上記(6)に記載のように連通管に真空ポンプならびに真空配管を連結してサイホン装置を形成できる設備とすることが望ましい。 It is desirable to by connecting a vacuum pump and the vacuum pipe siphon device can be formed equipment communicating pipe as described in (6) in such cases.

【0012】以下に本発明の理解のために図1を用いて説明を加える。 [0012] Add described with reference to FIG. 1 for the understanding of the present invention are described below. ただし、本発明の実施態様はこの説明によって限定されるものではない。 However, embodiments of the present invention is not intended to be limited by this description.

【実施例】本発明は処理水側にON−OFF弁を設置してもよいが、一切設備は設置しない。 EXAMPLES The present invention may be equipped with ON-OFF valve to the process water side, not all facilities are installed. 原水側には簡易な流量計を設置し、手動弁にて流量を変更できるようにすることができる。 The raw water side established a simple flow meter, it is possible to be able to change the flow rate manually valve. 本発明において、膜ろ過に必要な差圧は浸漬槽内の水位として表れる。 In the present invention, the differential pressure required for membrane filtration appears as the water level in the immersion tank. ろ過初期にろ過抵抗が低い場合は、槽内水位も低い(図1のLWL)。 If filtered initially filtration resistance is low, intracisternal water level is low (LWL in Figure 1). ろ過処理を続行することによりろ過抵抗が上昇すると、槽内水位が高くなる(図1のHWL)。 When filtration resistance by continuing the filtration process is increased, intracisternal water level is high (HWL in Figure 1). 流出配管に新たな差圧が生じる定流量弁のような圧損失を生むものがないため、ろ過槽と処理水槽との水位差は全て膜の差圧としてろ過に有効に利用される。 Because there is nothing produce pressure loss such as a constant flow valve of a new differential pressure is generated in the outlet pipe, the water level difference between the filter tank and process water tank is effectively utilized for all filtration as differential pressure membrane.

【0013】また、本発明においては、膜差圧の上昇は圧力計を設置しなくても水位にて検出できる。 [0013] In the present invention, increase in the transmembrane pressure difference can be detected by the water level even without installing a pressure gauge. さらに、 further,
原水流量が多少変動しても、膜浸漬槽と処理水槽の最大水位差以下であれば、浸漬槽(処理槽)水位は変動するが、原水量と処理水量は同じになり、自然に変動を吸収する。 It is varied raw water flow slightly, if more than the maximum water level difference treating tank with the membrane immersion tank, although immersion tank (processing tank) water level fluctuates, the raw water quantity and processing water is the same, the variation naturally Absorb. 処理を開始する時は、原水側、流出側のバルブを開として、原水を流入させるだけでよい。 When starting the process, as the raw water side, the outflow side of the valve opening, it is only necessary to flow into the raw water. 停止の場合はその逆である。 In the case of stop and vice versa. また、図2に示すように、処理水槽の水位を膜より上部になるようにすれば、流入側のON−O Further, as shown in FIG. 2, if the water level of the treating tank to be above the membrane, the inlet-side ON-O
FF弁も不要となる。 FF valve becomes unnecessary. 原水弁を開として、原水を流入させると、膜上部の水位から処理が開始され、ろ過膜のろ過抵抗に応じた槽内水位となる。 As the raw water valve opens, when flowing the raw water, process from the membrane top of the water level is started, the intracisternal water level in accordance with the filtration resistance of the filtration membrane. 原水弁を閉とすると、 When the raw water valve in the closed,
槽内水位は徐々に低下し、処理水槽レベル(膜上部)で停止する。 Intracisternal water level gradually decreases and stops the process water tank level (film top). これによって、膜が大気中に露出することはなく、原水弁のON−OFFのみで処理がおこなえることが理解される。 Thus, membrane never exposed to the atmosphere, ON-OFF only in the processing of raw water valve is understood that performed.

【0014】本発明の装置の概要は図1に示す通りである。 [0014] Summary of the apparatus of the present invention is shown in FIG. 図1において、MF膜モジュール3はろ過槽1の底部に設け、その上部に原水の貯留空間12を有する。 In Figure 1, MF membrane module 3 is provided at the bottom of the filtration tank 1 has a storage space 12 for raw water thereon. 図1では原水の貯留空間12は底部から上部まで均一な断面積を有する空間としてあるが、貯留空間12は上方に水位を確保できれば良い。 Storage space 12 of the raw water in FIG. 1 there is a space having a uniform cross-sectional area from the bottom to the top, the storage space 12 may if ensuring water level upwards. 従って膜モジュール3を設置してある部分の面積と同等の面積でなくても良い。 Accordingly membrane module 3 may not be equivalent to the area and the area of ​​the portion that is set up. 例えば極めて小さい面積で、煙突状にしても良い。 For example, in a very small area, it may be chimney. 上部が開放されているろ過槽1には上方に原水管6と槽内水位検出電極9と、下部にはMF膜3を介して処理水槽2に連通する流出管7が設けられている。 The filtration tank 1 top is open and the raw water pipe 6 and intracisternal water level detecting electrode 9 above, the outflow pipe 7 communicating with the treatment water tank 2 through the MF membrane 3 is provided in a lower portion. 原水管6には原水流入を調節する原水弁4と原水流量計5が、流出管7には処理水流出をON−OFFする流出弁8が設けられている。 The raw water pipe 6 is the raw water valve 4 and the raw water flow meter 5 for adjusting the water inlet, outlet valve 8 to ON-OFF of the treated water outlet is provided in the outlet pipe 7. しかしながら、処理水の吸引手段、すなわちMF膜3部分の駆動力を発するいかなる人為的な装置も流量調整手段も配置されていない。 However, the suction means of the treated water, i.e. any artificial device also flow rate adjusting means for issuing a driving force of the MF membrane 3 moiety is not also arranged. 本発明のろ過方法は、前述のように、原水弁4を開とするのみであり、原水がMF Filtration method of the present invention, as described above, only the raw water valve 4 open, the raw water is MF
膜3を通過する駆動力はろ過槽1と処理槽2の水位差により生じる。 Driving force through the membrane 3 is caused by the water level difference between the filter tank 1 and the processing vessel 2. ろ過抵抗の上昇に伴い、その水位は10から11となり、常にろ過抵抗に見合った圧力を得ることができる。 With increasing filtration resistance, the water level can be obtained the pressure commensurate with the next 11 to 10, always filtration resistance. 流出量は原水弁4により調整することができる。 Outflow can be adjusted by the raw water valve 4.

【0015】 [0015]

【発明の効果】本発明の本発明の膜ろ過方法及び装置によって、 (1)複雑な制御や高価な機器を使用しなくても、定流量の処理水が得られ、計画的な処理水利用が計れる。 By membrane filtration method and apparatus of the present invention of the present invention, (1) without using a complicated control and expensive equipment, the process water of a constant flow rate is obtained, deliberate treated water available It can be achieved. (2)複雑な制御や高価な機器を使用しないので、設備費が安価に済む。 (2) because it does not use complex control and expensive equipment, the equipment cost is low cost requires. また維持管理が容易である。 In addition it is easy to maintain. (3)自然平衡型のろ過であることも維持管理を容易にする。 (3) ease of maintenance it is natural balanced filtration. (4)本発明のろ過装置においては、水位差を最大限利用できるようにしたことによって、長期間長期間膜の洗浄や交換をしなくても良くできる。 (4) in the filtration device of the present invention, by which to be able to take full advantage of the water level difference, it may not be cleaned or replaced prolonged long-term membrane. (5)本発明のろ過装置は、処理槽に十分に原水を貯水できるので、原水流入量の変動に耐えることができる。 (5) filtration device of the present invention, it is possible to sufficiently reservoir raw water to the treatment tank can withstand fluctuations in raw water inflow.

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

【図1】処理槽内水位検出電極を有する、本発明のろ過装置の1例を示す説明図。 [1] having a treatment tank water level detecting electrode, explanatory view showing an example of a filtering device of the present invention.

【図2】水位検出の不要な、本発明のろ過装置の1例を示す説明図。 [Figure 2] unnecessary water level detection, explanatory view showing an example of a filtering device of the present invention.

【図3】容量ポンプを備えた従来の定量ろ過装置の例を示す概要図。 [Figure 3] schematic diagram showing an example of a conventional quantitative filtration device provided with a displacement pump.

【図4】流量計でポンプを制御する型の従来の定量ろ過装置の例を示す概要図。 Schematic diagram showing an example of a conventional quantitative filtration apparatus of the type for controlling the pump in FIG. 4 flowmeter.

【図5】流量計で弁を制御する型の従来の定量ろ過装置の例を示す概要図。 [5] schematic diagram showing an example of a conventional quantitative filtration device of the type controlling the valve with a flow meter.

【図6】定流量弁を備えた従来の定量ろ過装置の例を示す概要図。 [6] schematic diagram showing an example of a conventional quantitative filtration apparatus provided with a constant flow valve.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 ろ過槽 2 処理水槽 3 MF膜モジュール 4 原水弁 5 原水流量計 6 原水管 7 処理水流出管 8 流出弁 9 槽内水位検出電極 10 低水位 11 高水位 12 貯留空間 13 容量ポンプ 14 処理ポンプ 15 流量計 16 制御弁 17 ポンプ 18 定量弁 1 filtration tank 2 treatment water tank 3 MF membrane module 4 raw water valve 5 raw water flow meter 6 raw water pipe 7 treated water outlet pipe 8 outlet valve 9 intracisternal water level detecting electrode 10 and the low water level 11 High Water 12 storage space 13 capacity pump 14 process pump 15 the flow meter 16 control valve 17 the pump 18 shutoff valve

Claims (4)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 外圧型精密ろ過膜モジュールの透過に要する圧力を処理槽内の原水の水位と処理水の流出水位との水位差によって得る膜ろ過方法において、膜のろ過抵抗の変化に相当して処理槽内水位が変化することにより定流量処理水を得ることを特徴とする膜ろ過方法。 1. A external pressure type microfiltration membrane module membrane filtration method for obtaining the water level difference between the water level and outflow level of the treated water of the raw water in the treatment tank the pressure required in the transmission of, corresponds to a change in the filtration resistance of the film membrane filtration method characterized by obtaining the constant flow treated water by the treatment tank water level changes Te.
  2. 【請求項2】 前記外圧型精密ろ過膜モジュールの透過に要する圧力を水位差によって得る膜ろ過方法において、膜のろ過抵抗の変化を処理槽内水位により計測して調整することを特徴とする請求項1に記載の自然平衡型膜ろ過方法。 2. A membrane filtration process for obtaining the water level difference pressure required for transmission of the external pressure type microfiltration membrane module, and adjusting measures by treatment tank water level changes in the filtration resistance of the membrane according natural balanced membrane filtration method according to claim 1.
  3. 【請求項3】 処理槽内に外圧型精密ろ過膜モジュールを配置し、該処理槽内水位よりも低い位置に処理水を流出させる処理水流出管を備え、前記ろ過膜モジュールを前記処理槽底部に配置し、原水供給管に流量調節手段を配置し、前記ろ過膜モジュールの上方にろ過に必要な差圧相当の貯水空間を保持すると共に原水水位計測及び流入調整手段を設けたことを特徴とする膜ろ過装置。 3. Place the external pressure type microfiltration membrane modules in the processing bath comprises a treated water outlet pipe for discharging the treated water to a position lower than the treatment tank water level, the filtration membrane module the processing bath bottom placed, and characterized by a flow control means disposed in the raw water supply tube, provided with a raw water level measurement and inflow adjusting means holds the water storage space of the differential pressure corresponds required filtration above the filtration membrane module membrane filtration apparatus.
  4. 【請求項4】 処理槽内に外圧型精密ろ過膜モジュールを配置し、該ろ過膜モジュールと前記処理槽の水位よりも低い位置に配置した処理水槽を連通する連通管と前記処理水槽より処理水を流出させる処理水流出管を備えた膜ろ過装置において、前記ろ過膜モジュールを前記処理槽底部に配置し、原水供給管に流量調節手段を配置し、 4. Place the external pressure type microfiltration membrane modules in the processing bath, the filtration membrane module and the processing bath treated water from the treating tank and the communicating pipe that communicates the process water tank which is disposed at a position lower than the water level of the in membrane filtration apparatus having a treated water outlet pipe to flow out, the filtration membrane module is disposed in the processing tank bottom, a flow control means disposed in the raw water supply pipe,
    前記ろ過膜モジュールの上方にろ過に必要な差圧相当の貯水空間を保持すると共に原水水位計測及び流入調整手段を設けたことを特徴とする膜ろ過装置。 Membrane filtration apparatus characterized in that a raw water level measurement and inflow adjusting means holds the water storage space of the differential pressure corresponds required filtration above the filtration membrane module.
JP20254993A 1993-07-26 1993-07-26 Membrane filtration method and membrane filter Pending JPH07132213A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20254993A JPH07132213A (en) 1993-07-26 1993-07-26 Membrane filtration method and membrane filter

Publications (1)

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JPH07132213A true JPH07132213A (en) 1995-05-23

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003300072A (en) * 2002-04-09 2003-10-21 Ngk Insulators Ltd Method for treating waste water of polishing
US7025885B2 (en) 1998-11-23 2006-04-11 Zenon Environmental Inc. Water filtration using immersed membranes
US7063788B2 (en) 1995-08-11 2006-06-20 Zenon Environmental Inc. Apparatus for withdrawing permeate using an immersed vertical skein of hollow fibre membranes
CN103894072A (en) * 2012-12-27 2014-07-02 第一毛织株式会社 Separation membrane cleaning system and separation membrane cleaning method using the same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7063788B2 (en) 1995-08-11 2006-06-20 Zenon Environmental Inc. Apparatus for withdrawing permeate using an immersed vertical skein of hollow fibre membranes
US7025885B2 (en) 1998-11-23 2006-04-11 Zenon Environmental Inc. Water filtration using immersed membranes
JP2003300072A (en) * 2002-04-09 2003-10-21 Ngk Insulators Ltd Method for treating waste water of polishing
CN103894072A (en) * 2012-12-27 2014-07-02 第一毛织株式会社 Separation membrane cleaning system and separation membrane cleaning method using the same
CN103894072B (en) * 2012-12-27 2018-02-27 乐天尖端材料株式会社 Seperation film purging system and the seperation film cleaning method using the system

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