JPH05137977A - Detection of separation membrane breakage for membrane filter - Google Patents

Detection of separation membrane breakage for membrane filter

Info

Publication number
JPH05137977A
JPH05137977A JP30002691A JP30002691A JPH05137977A JP H05137977 A JPH05137977 A JP H05137977A JP 30002691 A JP30002691 A JP 30002691A JP 30002691 A JP30002691 A JP 30002691A JP H05137977 A JPH05137977 A JP H05137977A
Authority
JP
Japan
Prior art keywords
separation membrane
membrane
pressure
air
bubble point
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP30002691A
Other languages
Japanese (ja)
Inventor
Katsuro Ishihara
Kanji Tokushima
幹治 徳島
勝郎 石原
Original Assignee
Kubota Corp
株式会社クボタ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kubota Corp, 株式会社クボタ filed Critical Kubota Corp
Priority to JP30002691A priority Critical patent/JPH05137977A/en
Publication of JPH05137977A publication Critical patent/JPH05137977A/en
Application status is Pending legal-status Critical

Links

Abstract

PURPOSE: To detect whether there us a breakage of a separation membrane in a membrane filter without individual difference by using a backwash air supply device to detect the pressure of the supplied air.
CONSTITUTION: A pump (P) is stopped running and a stop valve 3 is closed. A valve 4 is opened while detecting air pressure by a pressure gage (S) to gradually supply air from a compressor (C) to membrane filter 1. The detected pressure is compared with a bubble point, i.e., the pressure at which a bubble first appears in liquid in the unbroken separation membrane and which was previously measured. That is to say, when the detected pressure is not less than the bubble point, the separation membrane is judged unbroken. When the detected pressure does not reach the bubble point with air continuously supplied, the separation membrane is judged that it is broken or it leaks from the fitting part. Thus whether there is a breakage of the separation membrane is surely recognized.
COPYRIGHT: (C)1993,JPO&Japio

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、液中に浸漬される分離膜と、その分離膜に対する逆洗用エアー供給装置とを備えた膜濾過装置において、前記分離膜の破損を検知する方法に関する。 BACKGROUND OF THE INVENTION This invention provides a membrane filtration apparatus provided with a separation membrane is immersed in the liquid, and air supply device for backwashing for the separation membrane, to a method of detecting the breakage of the separation membrane .

【0002】 [0002]

【従来の技術】従来、この種の膜濾過装置の分離膜の破損を検知するには、濾液の濁度を目視で観察する方法に頼っていた。 Conventionally, to detect the breakage of the separation membrane of this type of membrane filtration apparatus were relying on methods of observing the turbidity of the filtrate visually.

【0003】 [0003]

【発明が解決しようとする課題】ところが、この方法では、濁度の判定に個人差があり、そのため分離膜破損の有無の判断ミスが伴いやすい欠点があった。 [SUMMARY OF THE INVENTION However, in this method, there are individual differences in the determination of the turbidity, there is the accompanying likely disadvantages misjudgment of whether therefore separation membrane damage. そこで、本発明の目的は、個人差なく簡単で確実な膜濾過装置の分離膜破損検知方法を提供することにある。 An object of the present invention is to provide a separation membrane damage detection of personal difference without simple and reliable membrane filtering device.

【0004】 [0004]

【課題を解決するための手段】この目的を達成するための本発明による膜濾過装置の分離膜の破損検知方法の特徴手段は、分離膜の一方の面が液中に浸漬された状態で、逆洗用エアー供給装置からエアーをその圧力上昇を検出しながら徐々に供給し、その検出圧力が、予め測定してある破損のない前記分離膜のバブルポイント以上になる場合は前記分離膜が破損していないものと判断し、 Wherein means corruption detection method of the separation membrane of the membrane filtration device according to the present invention for achieving the Means for Solving the Problems] This object is in a state where one surface of the separation membrane is immersed in the liquid, the air from the air supply device for backwashing gradually fed while detecting the pressure increase, the detected pressure, may become more bubble point of undamaged the resulting membrane is previously measured the separation membrane damage it is determined that you do not have,
前記バブルポイントに達しない場合は、破損しているものと判断するところにある。 If not reaching the bubble point is the place where it is judged that the corrupt.

【0005】 [0005]

【作用】破損のない分離膜の一方の面が液中に浸漬された状態で、他方の面にエアー圧力を徐々にかけてゆき、 In a state where one surface without separation films [action] corruption is immersed in the liquid, Yuki gradually over the air pressure on the other side,
前記液中に気泡が最初に出てくる圧力即ちバブルポイントを予め測定しておき、これと比較して、濾過膜装置の分離膜が破損していない場合には、分離膜の一方の面が液中に浸漬された状態で、エアーを、その圧力上昇を検出しながら徐々に供給してゆくと、その検出圧力は前記バブルポイント以上になるが、濾過膜装置の分離膜が破損している場合には、同様にしてエアーを供給しても、 Measured in advance pressure or bubble point bubbles first appears in the liquid, compared to this, when the separation membrane of the filtration membrane apparatus is not corrupted, one surface of the separation membrane in a state of being immersed in the liquid, the air and slide into supply gradually while detecting the pressure increase, although the detected pressure becomes greater than or equal to the bubble point, the separation membrane of the filtration membrane apparatus is damaged in this case, even if the supply air in the same manner,
前記バブルポイントよりも低い圧力で破損箇所からエアーが液中に漏れてしまうため、検出圧力が同様には上がらず前記バブルポイントに達しない。 Wherein for air from the damaged section at a pressure lower than the bubble point leaks in the liquid, the detected pressure does not reach the bubble point does not rise in the same manner. 従って、前記エアーの検出圧力が前記バブルポイント以上になれば、分離膜が破損していないものと判断し、ある程度時間が経過しても前記バブルポイントに達しない場合は、分離膜が破損しているものと判断することによって、膜濾過装置の分離膜破損の有無を確実に知ることができる。 Therefore, if the air detected pressure above the bubble point, it is determined that the separation membrane is not damaged, the If after some time does not reach the bubble point, the separation membrane is broken by it judged that there can reliably know the presence or absence of separation membrane damage to the membrane filtering device.

【0006】 [0006]

【発明の効果】分離膜破損検知のためのエアーを供給するのに、逆洗用エアー供給装置を利用し、供給エアーの圧力を検出するだけで、個人差なく簡単で確実に膜濾過装置の分離膜破損の有無を検知することができるようになった。 Effects of the Invention for supplying air for separation membrane damage detection, using the air supply device for backwashing, only detect pressure of the feed air, personal difference without a simple reliably membrane filtering device it has become possible to detect the presence or absence of the separation membrane damage.

【0007】 [0007]

【実施例】以下、図に基づいて本発明による膜濾過装置の分離膜破損検知方法を説明する。 EXAMPLES Hereinafter, the separation membrane breakage detecting method of membrane filtration apparatus according to the present invention will be described with reference to FIG. 図1は膜濾過装置1 Figure 1 is a membrane filtration apparatus 1
を活性汚泥による汚水処理槽2に浸漬してポンプPの負圧により槽内の被濾過液を吸引濾過する設備を示す説明図である。 The is an explanatory diagram showing an equipment for suction filtration the liquid to be filtered in the tank by the negative pressure of the pump P is immersed in the sewage treatment tank 2 by activated sludge. 図中Cは逆洗用エアー供給装置たるエアーコンプレッサーである。 C in the figure is an air compressor serving air supply device for backwashing. 3、4は開閉バルブである。 3 and 4 are off valve. 通常の濾過時にはバルブ4を閉じ、バルブ3を開いて濾過を行う。 Closing the valve 4 during normal filtration, the filtered by opening the valve 3. Sは、膜濾過装置1の分離膜破損の有無を知るための圧力ゲージで、前記エアーコンプレッサCーから膜濾過装置1に通ずる配管の途中の膜濾過装置1に近い位置のエアー圧を検出できるようにしてある。 S is a pressure gauge to know the presence or absence of the separation membrane damage membrane filtering device 1 can detect the air pressure of the position close to the middle of the membrane filtering device 1 of the pipe leading from the air compressor C over the membrane filtration unit 1 It is so. 上記の構成によって、膜濾過装置1の分離膜破損の有無を簡単に検知することができる。 By the arrangement, it is possible to easily detect the presence or absence of the separation membrane damage membrane filtering device 1. これを検知するには、ポンプPを止めて開閉バルブ3を閉じ、圧力ゲージSによって前記エアー圧を検出しながらバルブ4を開いて、エアーコンプレッサーCから膜濾過装置1にエアーを徐々に供給し、その検出圧力を、同様の手順によって予め求めた破損のない分離膜において液中に気泡が最初に出てくる圧力即ちバブルポイントと比較して次のように判断すればよい。 To detect this, closing the on-off valve 3 to stop the pump P, by opening the valve 4 while detecting the air pressure by a pressure gauge S, gradually supplying air to the membrane filtering device 1 from an air compressor C , the detected pressure, the same procedure bubbles in the liquid in the free separation films previously determined corrupted by the compared to the pressure or bubble point initially come out may be determined as follows. 即ち、前記検出圧力が前記バブルポイント以上になる場合は分離膜の破損はないと判断し、エアーを供給し続けても前記検出圧力が前記バブルポイントに達しない場合は分離膜そのものが破損しているか、分離膜の取付部からリークしている等の異常があると判断することができる。 That is, when the detected pressure becomes equal to or higher than the bubble point is determined not to damage the separation membrane when the detection pressure be continuously supplied air does not reach the bubble point separation film itself is broken dolphin, it can be determined from the mounting portion of the separation membrane that there is an abnormality such as are leaking. 異常の有無は、前記圧力ゲージSの目盛りを直接読み取ることにより判断してもよいが、例えば、一定時間エアーが供給されても前記検出圧力が前記バブルポイントに達しない場合は警報が発せられるようにする等、異常の有無を自動的に検知することのできる構成にすることも容易である。 The presence or absence of abnormality, the pressure gauge scale may be determined by reading the direct S but, for example, when the detected pressure is also supplied a predetermined time air does not reach the bubble point so that an alarm is issued it is easy to configure the like, capable of automatically detecting the presence or absence of abnormality to. 尚、図2に、一定の流量で徐徐にエアーを供給するときのエアー供給時間tとこれに対応するエアーの検出圧力pを、前者を横軸に、後者を縦軸にして、定性的にグラフ化したものを示す。 Incidentally, in FIG. 2, the detected pressure p of the air corresponding thereto and an air supply time t when supplying a gradually air at a constant flow rate, the horizontal axis of the former, and the latter on the vertical axis, qualitatively It shows a graph of. Nは新しい分離膜、Uは使用中の破損していない分離膜、Rは破損した分離膜におけるグラフである。 N is a graph in the new separation membrane, U is undamaged separation membrane in use, separation membrane R is damaged. 図中B. In the figure B. Pは新しい分離膜におけるバブルポイントを示す。 P indicates the bubble point in the new separation membrane.

【0008】〔実験例〕図3に、分離膜の破損が供給エアー圧に及ぼす影響を調べた実験装置を示す。 [0008] [Experimental Example] Fig. 3 shows the breakage of the separation membrane was investigated the effect on the supply air pressure experimental apparatus. 並列に連結されたセラミック膜モジュール M1、M2、M3より成る膜濾過装置1を、水を満たした処理槽2に浸漬すると共に、通常濾過時用の吸引ポンプP及び逆洗用エアー供給装置たるエアーコンプレッサーC並びにバルブ3、4を設け、濾過と逆圧洗浄のいずれの状態にでも切り換えられるように配管してある。 Ceramic membrane module M1 connected in parallel, M2, the membrane filtering device 1 consisting of M3, while immersed in the treatment tank 2 filled with water, serving normal suction pump P and the air supply device for backwashing for filtration air the provided compressor C and valves 3 and 4, are piping to be switched to any of the states of the filtration and back pressure cleaning. セラミック膜モジュールM1、M2、M3は、それぞれ濾過面積2.4m 2 Ceramic membrane module M1, M2, M3, respectively filtration area 2.4 m 2
の標準膜モジュールを用いた。 Using a standard membrane module. 吸引ポンプPを停止し、 A suction pump P is stopped,
バルブ3を閉じ、バルブ4を開いて、コンプレッサーP A closed valve 3, by opening the valve 4, compressor P
から膜濾過装置1に、通常の濾過時とは反対方向に徐々にエアーを送りながら、圧力ゲージSの目盛りを読み、 The membrane filtration device 1 from, the normal filtration while feeding a gradually air in the opposite direction, reading the scale of the pressure gauge S,
供給エアー圧がどこまで上がるかを、前記膜モジュールM2だけが割れている場合、M1だけが割れている場合、M1、M2、M3共に割れがなく正常である場合についてそれぞれ調べたところ、この順に0.1kg/cm 2 Or supply air pressure is increased far, when the film only module M2 is cracked, if only M1 is cracked, M1, M2, M3 together were examined each case cracking is normal without, in this order 0 .1kg / cm 2,
0.1kg/cm 2 、1.5kg/cm 2であった。 0.1kg / cm 2, was 1.5kg / cm 2. ちなみに、濾過面積2.4m 2の正常な標準膜モジュールのバブルポイントは1.2kg/cm 2であった。 Incidentally, the bubble point of a normal standard membrane module of the filtration area 2.4 m 2 was 1.2 kg / cm 2. 尚、特許請求の範囲の項に図面との対照を便利にするために符号を記すが、該記入により本発明は添付図面の構成に限定されるものではない。 Although referred to code For convenience of reference the drawings-claims, the present invention by the entry is not intended to be limited to the configuration of the accompanying drawings.

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

【図1】本発明による膜濾過装置の分離膜の破損検知方法の説明図 Illustration of a breakage detection method of the separation membrane of the membrane filtration device according to the invention; FIG

【図2】分離膜の破損等の異常が供給エアーの検出圧力に及ぼす影響を示す曲線グラフ [Figure 2] curve graph showing the effect of abnormality such as breakage of the separation membrane on the pressure detected by the supply air

【図3】本発明による膜濾過装置の破損検知方法の実験例 Experiment corruption detection method of a membrane filtration apparatus according to the present invention; FIG

【符号の説明】 DESCRIPTION OF SYMBOLS

1 膜濾過装置 C 逆洗用エアー供給装置 1 membrane filtering device C backwash air supply device

Claims (1)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 液中に浸漬される分離膜と、その分離膜に対する逆洗用エアー供給装置(C)とを備えた膜濾過装置(1)において、前記分離膜の破損を検知する方法であって、 前記分離膜の一方の面が液中に浸漬された状態で、前記逆洗用エアー供給装置(C)からエアーをその圧力上昇を検出しながら徐々に供給し、その検出圧力が、予め測定してある破損のない前記分離膜のバブルポイント以上になる場合は前記分離膜が破損していないものと判断し、前記バブルポイントに達しない場合は、破損しているものと判断する膜濾過装置の分離膜破損検知方法。 A separation membrane is immersed in claim 1] solution in its air supply device for backwashing to separation membrane (C) membrane filtering device that includes a (1), in a way of detecting the breakage of the separation membrane there, in the state where one surface of the separation membrane is immersed in the liquid, the air from the backwash air supply device (C) was gradually fed while detecting the pressure increase and the detected pressure, previously if the measured damage the equal to or greater than the bubble point of the separation membrane without are is determined that the separation membrane is not damaged, if not reaching the bubble point, a film judged to be corrupt separation membrane damage detection method of the filter.
JP30002691A 1991-11-15 1991-11-15 Detection of separation membrane breakage for membrane filter Pending JPH05137977A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP30002691A JPH05137977A (en) 1991-11-15 1991-11-15 Detection of separation membrane breakage for membrane filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30002691A JPH05137977A (en) 1991-11-15 1991-11-15 Detection of separation membrane breakage for membrane filter

Publications (1)

Publication Number Publication Date
JPH05137977A true JPH05137977A (en) 1993-06-01

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1720640A1 (en) * 2004-02-18 2006-11-15 US Filter Wastewater Group, Inc. Continuous pressure decay test
US20120297862A1 (en) * 2011-03-31 2012-11-29 Krones Ag Method of checking a membrane filtration module of a filtration plant
US8840783B2 (en) 2007-05-29 2014-09-23 Evoqua Water Technologies Llc Water treatment membrane cleaning with pulsed airlift pump
US8858796B2 (en) 2005-08-22 2014-10-14 Evoqua Water Technologies Llc Assembly for water filtration using a tube manifold to minimise backwash
US8956464B2 (en) 2009-06-11 2015-02-17 Evoqua Water Technologies Llc Method of cleaning membranes
US9023206B2 (en) 2008-07-24 2015-05-05 Evoqua Water Technologies Llc Frame system for membrane filtration modules
US9022224B2 (en) 2010-09-24 2015-05-05 Evoqua Water Technologies Llc Fluid control manifold for membrane filtration system
US9533261B2 (en) 2012-06-28 2017-01-03 Evoqua Water Technologies Llc Potting method
US9604166B2 (en) 2011-09-30 2017-03-28 Evoqua Water Technologies Llc Manifold arrangement
US9675938B2 (en) 2005-04-29 2017-06-13 Evoqua Water Technologies Llc Chemical clean for membrane filter
US9764289B2 (en) 2012-09-26 2017-09-19 Evoqua Water Technologies Llc Membrane securement device
US9764288B2 (en) 2007-04-04 2017-09-19 Evoqua Water Technologies Llc Membrane module protection
US9815027B2 (en) 2012-09-27 2017-11-14 Evoqua Water Technologies Llc Gas scouring apparatus for immersed membranes
US9914097B2 (en) 2010-04-30 2018-03-13 Evoqua Water Technologies Llc Fluid flow distribution device
US9925499B2 (en) 2011-09-30 2018-03-27 Evoqua Water Technologies Llc Isolation valve with seal for end cap of a filtration system
US9962865B2 (en) 2012-09-26 2018-05-08 Evoqua Water Technologies Llc Membrane potting methods
US10322375B2 (en) 2015-07-14 2019-06-18 Evoqua Water Technologies Llc Aeration device for filtration system

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1720640A4 (en) * 2004-02-18 2007-05-30 Siemens Water Tech Corp Continuous pressure decay test
EP1720640A1 (en) * 2004-02-18 2006-11-15 US Filter Wastewater Group, Inc. Continuous pressure decay test
US9675938B2 (en) 2005-04-29 2017-06-13 Evoqua Water Technologies Llc Chemical clean for membrane filter
US8858796B2 (en) 2005-08-22 2014-10-14 Evoqua Water Technologies Llc Assembly for water filtration using a tube manifold to minimise backwash
US8894858B1 (en) 2005-08-22 2014-11-25 Evoqua Water Technologies Llc Method and assembly for water filtration using a tube manifold to minimize backwash
US9764288B2 (en) 2007-04-04 2017-09-19 Evoqua Water Technologies Llc Membrane module protection
US8840783B2 (en) 2007-05-29 2014-09-23 Evoqua Water Technologies Llc Water treatment membrane cleaning with pulsed airlift pump
US9206057B2 (en) 2007-05-29 2015-12-08 Evoqua Water Technologies Llc Membrane cleaning with pulsed airlift pump
US9573824B2 (en) 2007-05-29 2017-02-21 Evoqua Water Technologies Llc Membrane cleaning with pulsed airlift pump
US9023206B2 (en) 2008-07-24 2015-05-05 Evoqua Water Technologies Llc Frame system for membrane filtration modules
US8956464B2 (en) 2009-06-11 2015-02-17 Evoqua Water Technologies Llc Method of cleaning membranes
US9914097B2 (en) 2010-04-30 2018-03-13 Evoqua Water Technologies Llc Fluid flow distribution device
US9630147B2 (en) 2010-09-24 2017-04-25 Evoqua Water Technologies Llc Fluid control manifold for membrane filtration system
US9022224B2 (en) 2010-09-24 2015-05-05 Evoqua Water Technologies Llc Fluid control manifold for membrane filtration system
US20120297862A1 (en) * 2011-03-31 2012-11-29 Krones Ag Method of checking a membrane filtration module of a filtration plant
US9604166B2 (en) 2011-09-30 2017-03-28 Evoqua Water Technologies Llc Manifold arrangement
US9925499B2 (en) 2011-09-30 2018-03-27 Evoqua Water Technologies Llc Isolation valve with seal for end cap of a filtration system
US9533261B2 (en) 2012-06-28 2017-01-03 Evoqua Water Technologies Llc Potting method
US9764289B2 (en) 2012-09-26 2017-09-19 Evoqua Water Technologies Llc Membrane securement device
US9962865B2 (en) 2012-09-26 2018-05-08 Evoqua Water Technologies Llc Membrane potting methods
US9815027B2 (en) 2012-09-27 2017-11-14 Evoqua Water Technologies Llc Gas scouring apparatus for immersed membranes
US10322375B2 (en) 2015-07-14 2019-06-18 Evoqua Water Technologies Llc Aeration device for filtration system

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