JP3312838B2 - Inspection method for hollow fiber membrane and inspection method for hollow fiber membrane module - Google Patents
Inspection method for hollow fiber membrane and inspection method for hollow fiber membrane moduleInfo
- Publication number
- JP3312838B2 JP3312838B2 JP02729596A JP2729596A JP3312838B2 JP 3312838 B2 JP3312838 B2 JP 3312838B2 JP 02729596 A JP02729596 A JP 02729596A JP 2729596 A JP2729596 A JP 2729596A JP 3312838 B2 JP3312838 B2 JP 3312838B2
- Authority
- JP
- Japan
- Prior art keywords
- hollow fiber
- fiber membrane
- inspection method
- membrane
- pressure
- 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.)
- Expired - Fee Related
Links
- 239000012528 membrane Substances 0.000 title claims description 130
- 239000012510 hollow fiber Substances 0.000 title claims description 107
- 238000000034 method Methods 0.000 title claims description 44
- 238000007689 inspection Methods 0.000 title claims description 37
- 230000002950 deficient Effects 0.000 claims description 27
- 239000012530 fluid Substances 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 14
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 2
- 230000007547 defect Effects 0.000 description 31
- 238000001514 detection method Methods 0.000 description 19
- 239000010408 film Substances 0.000 description 14
- 230000003068 static effect Effects 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000010419 fine particle Substances 0.000 description 6
- 238000001914 filtration Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000011085 pressure filtration Methods 0.000 description 4
- 238000011001 backwashing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- -1 wastewater treatment Substances 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、中空糸膜の欠陥を
検出する方法及び、中空糸膜の束をケース内に装填した
中空糸膜モジュールの欠陥を検出する方法に関する。The present invention relates to a method for detecting a defect in a hollow fiber membrane and a method for detecting a defect in a hollow fiber membrane module in which a bundle of hollow fiber membranes is loaded in a case.
【０００２】[0002]
【従来の技術】従来より、ケース内に挿入された多数本
の中空糸膜を、ケース開口部にて各中空糸膜の端末を開
口させた状態で封止剤により封止して封止部を形成し、
この封止部によりケース内部と外部を隔離して、供給さ
れるろ過対象流体の中に混在する除去対象物質（微粒子
成分）等を中空糸膜の膜によりろ過して取り除く中空糸
膜モジュールが知られている。2. Description of the Related Art Conventionally, a large number of hollow fiber membranes inserted into a case are sealed with a sealant in a state where the ends of the hollow fiber membranes are opened at the case openings. To form
A hollow fiber membrane module that separates the inside and the outside of the case by this sealing portion and removes a substance to be removed (fine particle component) and the like mixed in a supplied fluid to be filtered by a hollow fiber membrane is known. Have been.
【０００３】このような中空糸膜モジュールでは、例え
ば純水の製造、用水の滅菌・除濁、排水処理あるいは油
水分離等に用いられ、中空糸膜の欠陥や損傷（ピンホー
ルや亀裂、あるいは切断）等による微小リークでさえ、
中空糸膜モジュールを使用するシステムに致命的な影響
を与えることがある。従って、中空糸膜モジュールの信
頼性を向上・確保することは重要な課題である。[0003] Such a hollow fiber membrane module is used, for example, for the production of pure water, sterilization and turbidity of water, wastewater treatment, oil / water separation, and the like. ) Etc.
This can have a fatal effect on systems that use hollow fiber membrane modules. Therefore, it is important to improve and secure the reliability of the hollow fiber membrane module.
【０００４】中空糸膜のリーク欠陥を検出する方法とし
ては、一例として中空糸膜を適切な液体（水あるいはア
ルコール水溶液等）で濡らした状態で、中空糸膜の膜の
外側から内側あるいは内側から外側へ所定圧力のエアを
供給し、その際のエア流量を測定してリークの有無を検
出する方法が採用されている。As a method of detecting a leak defect of a hollow fiber membrane, for example, a method is used in which the hollow fiber membrane is wetted with an appropriate liquid (such as water or an aqueous alcohol solution) from the outside or inside of the hollow fiber membrane. A method of supplying air at a predetermined pressure to the outside and measuring the air flow rate at that time to detect the presence or absence of a leak is adopted.
【０００５】この方法において、中空糸膜の膜の外側か
ら内側へエアを通過させる場合には、封止端面でのエア
透過流量の大小でリーク欠陥のある中空糸膜を特定する
ことが可能である。なお、この時のエア圧を中空糸膜モ
ジュールの使用される圧力程度に設定することで耐圧検
査も兼ね合わせて行うことが可能である。In this method, when air is passed from the outside to the inside of the hollow fiber membrane, a hollow fiber membrane having a large or small air permeation flow rate at the sealing end face and having a leak defect can be specified. is there. In addition, by setting the air pressure at this time to about the pressure used for the hollow fiber membrane module, it is possible to perform the pressure resistance test together.
【０００６】また具体的な検出方法としては、例えば特
公平２−１４０８４号公報に開示されたもので、中空糸
膜モジュールの各中空糸膜の端末の開口部より減圧吸引
し、中空糸膜の外表面より微粒子を含むエアを流入さ
せ、開口部から吸引したエアをパーティクルカウンタを
通過させ、その吸引エア中の塵等の微粒子の数を測定し
て欠陥の有無を検出する方法がある。A specific detection method is disclosed in, for example, Japanese Patent Publication No. 2-14084, in which the hollow fiber membrane module is suctioned under reduced pressure from the opening of the end of each hollow fiber membrane, and There is a method of flowing air containing fine particles from the outer surface, passing the air sucked from the opening through a particle counter, and measuring the number of fine particles such as dust in the sucked air to detect the presence or absence of a defect.
【０００７】さらにその他の例として、特開昭５３−１
３４７７６号公報に開示されたもので、中空糸膜の外面
にガスを供給し、その中空糸膜の開口端部の欠陥箇所よ
りガスを漏洩させ、光学システムを用いてその漏洩ガス
の流出状況に応じた屈折現象により欠陥の有無を検出す
る方法がある。As still another example, Japanese Patent Application Laid-Open No.
No. 34776 discloses a method of supplying a gas to the outer surface of a hollow fiber membrane, leaking the gas from a defective portion at the open end of the hollow fiber membrane, and using an optical system to check the outflow state of the leaked gas. There is a method of detecting the presence or absence of a defect based on the refraction phenomenon according to the method.
【０００８】そして上記に例示されたような欠陥検出方
法によって検出された欠陥の補修方法としては、例えば
特開昭５３−１３４７７６号公報等に開示されたもの
で、流動性を備えた封止剤を開口端面のその欠陥位置に
滴下して封止する方法が一般的に採用されている。A method for repairing a defect detected by the defect detection method exemplified above is disclosed in, for example, Japanese Patent Application Laid-Open No. 53-134776, etc. Is generally applied to the opening end face at the position of the defect by sealing.
【０００９】しかしながら、上記のような検査方法では
完成直後の中空糸膜モジュールの状態を検査する方法と
しては効果的であるが、中空糸膜にこの様な検査では検
出されないもので、使用時の実際に圧力負荷が繰り返し
かかった場合に発現する内包的な膜欠陥がある場合に
は、これを検出することができない。However, the above-described inspection method is effective as a method for inspecting the state of the hollow fiber membrane module immediately after completion, but it is not detected by the hollow fiber membrane by such an inspection, and the hollow fiber membrane module cannot be used at the time of use. In the case where there is an intrinsic film defect that appears when the pressure load is repeatedly applied, this cannot be detected.
【００１０】つまり、初期的な静圧による検査方法では
膜の内包的（潜在的）な欠陥部分を検出（あるいはリー
クさせる）ことができず、これをこのままシステムに使
用してしまうと実際の運転途中に内包的な欠陥が実害あ
る欠陥として発現してしまうことになる。従って、この
ような内包的な欠陥に関しては実際の使用に近似させた
圧力等の負荷をかけた状況下での耐久検査を行う必要が
あった。In other words, an initial (static) inspection method based on static pressure cannot detect (or leak) an intrinsic (potential) defective portion of the membrane. An inclusive defect appears as a harmful defect on the way. Therefore, it is necessary to perform an endurance test under such a condition that a load such as pressure approximate to actual use is applied to such an intrinsic defect.
【００１１】一般的に膜欠陥の種類としては、偏肉、膜
厚の局所的に薄いもの、膜つぶれ・偏平等があり、これ
らの欠陥のリーク影響度と、初期的な静圧による検査方
法により検出可能か否かを表１にまとめる。In general, types of film defects include uneven thickness, locally thin film thickness, film collapse and flattening, and the like. Table 1 summarizes whether or not detection is possible.
【００１２】[0012]
【表１】 従って、表１によると膜つぶれ・偏平に対しては初期的
な静圧による検査方法では上記の理由により膜の欠陥部
分を検出することが不可能である。[Table 1] Therefore, according to Table 1, it is impossible to detect a defective portion of the film by the initial static pressure inspection method for the film collapse / flattening due to the above-mentioned reason.
【００１３】膜つぶれ・偏平においてのリーク発生のメ
カニズムは、一旦つぶれて変形してしまった中空糸膜は
実際のシステムの運転中に内圧（膜の外側から内側へろ
過する「外圧ろ過」の場合は逆洗時、また、膜の内側か
ら外側へろ過する「内圧ろ過」の場合はろ過時）がかか
った場合に、膨らんで正常な形態へと戻るが、外圧が加
わった場合にはまたつぶれてしまう。これが繰り返され
ることにより膜つぶれの部位に屈曲による疲労が発生し
て最終的に破断に到ることになる。但し、膜つぶれ・偏
平等の欠陥が発生していない正常な部位においては、内
圧及び外圧の繰り返し負荷によっても形態が変化せずに
つぶれず、ダメージを受けることはない。[0013] The mechanism of the leak occurrence in the collapse and flattening of the membrane is that the hollow fiber membrane once collapsed and deformed is subjected to the internal pressure during the operation of the actual system (in the case of "external pressure filtration" in which the membrane is filtered from the outside to the inside of the membrane). Is swelled and returns to the normal form when backwashing is performed, or when filtration is performed (internal pressure filtration, which filters from the inside to the outside of the membrane), but collapses when external pressure is applied. Would. By repeating this, fatigue occurs due to bending at the portion where the film is crushed, and eventually breaks. However, in a normal portion where a defect such as film collapse or flattening does not occur, the shape does not change due to the repeated load of the internal pressure and the external pressure, and the portion is not collapsed and is not damaged.
【００１４】また、つぶれのように明らかな膜変形では
なく、微小な折れや偏平等の何らかの膜欠陥を有する場
合にも、ろ過と逆洗あるいはろ過と停止の繰り返しの際
に、中空糸膜自体の膨張と圧縮の繰り返しとなるので、
膜の破断が発生し易くなる傾向がある。[0014] Further, even when the membrane has some membrane defects such as minute breakage or flattening, not the apparent membrane deformation such as crushing, the hollow fiber membrane itself can be formed by repeating the filtration and backwashing or the filtration and the stop. Since the expansion and compression of the
There is a tendency for the film to break easily.
【００１５】[0015]
【発明が解決しようとする課題】以上のことから、より
信頼性の高い中空糸膜モジュールを得るには、全く欠陥
の存在しない中空糸膜モジュールを製作すること、もし
くは製作された中空糸膜モジュールの検査方法を静圧的
な検査のみならず、繰り返し圧力負荷を加えることによ
って検出される内包的な膜の欠陥まで検出・特定して補
修することが必要となる。As described above, in order to obtain a hollow fiber membrane module with higher reliability, it is necessary to manufacture a hollow fiber membrane module having no defect or to manufacture a manufactured hollow fiber membrane module. In addition to the static pressure inspection, it is necessary to detect, identify, and repair inclusive film defects detected by repeatedly applying a pressure load.
【００１６】従って、製造工程の改善等で可能な限り欠
陥を発生させないようにすると共に、検査としては、静
圧的な検査と実使用に近似させた形態で中空糸膜モジュ
ールに繰り返し圧力負荷をかける耐圧耐久検査が必要と
なっている。Accordingly, defects are prevented from being generated as much as possible by improving the manufacturing process and the like. In addition, as the inspection, a pressure load is repeatedly applied to the hollow fiber membrane module in a form similar to the static pressure inspection and actual use. It is necessary to perform a withstand pressure durability test.
【００１７】しかしながら、この耐圧耐久検査により膜
つぶれ・偏平等の欠陥部分をリークさせるためには、そ
の欠陥の程度に応じた検査時間（圧力負荷の繰り返し回
数）が必要となる。この検査時間を短縮するためには、
圧力負荷の１サイクルあたりの時間を短縮する方法や、
検査時の流入流体の温度を高める等の方法が採用されて
いるが、大幅な時間の短縮は望めない。However, in order to leak a defective portion such as a crushed film or a flattened film by the withstand voltage durability test, an inspection time (the number of repetitions of pressure load) according to the degree of the defect is required. In order to shorten this inspection time,
How to reduce the time per cycle of pressure load,
Although a method of increasing the temperature of the inflow fluid at the time of inspection is employed, a drastic reduction in time cannot be expected.
【００１８】例えば、外径１．４ｍｍ，内径０．８ｍｍ
の中空糸膜（ポリスルホン限外ろ過膜で分画分子量５０
０００のもの）では、１サイクル当たり内圧ろ過６０
秒，外圧ろ過６０秒の繰り返しを行う耐圧耐久検査では
欠陥を発現させるために２時間から８時間もの検査時間
を必要としてしまい、検査工程に多大な時間と費用がか
かり経済的ではなかった。For example, an outer diameter of 1.4 mm and an inner diameter of 0.8 mm
Hollow fiber membrane (polysulfone ultrafiltration membrane with molecular weight cut off of 50)
000) per cycle.
In a pressure endurance test in which repetition of seconds and external pressure filtration is repeated for 60 seconds, an inspection time of 2 to 8 hours is required to develop a defect, and the inspection process is enormous and expensive, and is not economical.
【００１９】本発明は上記従来技術の問題を解決するた
めになされたもので、その目的とするところは、静圧的
な検査では検出することの不可能な、内包的な欠陥を検
出する方法において、簡単な構成で短時間に検出するこ
とが可能な検査方法を開示することにある。The present invention has been made to solve the above-mentioned problems of the prior art, and has as its object to provide a method of detecting an intrinsic defect which cannot be detected by a static pressure inspection. It is an object of the present invention to disclose an inspection method capable of performing detection in a short time with a simple configuration.
【００２０】[0020]
【課題を解決するための手段】上記目的を達成するため
に本発明にあっては、中空糸膜の膜の外周表面を加圧し
て膜の欠陥部をつぶして膜の内径流路を閉塞させ、前記
中空糸膜の一方の開口端から中空糸膜の内径流路に流体
を供給し、他方の開口端において前記内径流路を通過し
た流体を検出し、流体が検出されない中空糸膜を、膜に
欠陥部の存在するものとして特定することを特徴とす
る。According to the present invention, in order to achieve the above object, the outer peripheral surface of a hollow fiber membrane is pressurized to crush a defective portion of the membrane and close an inner diameter flow path of the membrane. A fluid is supplied from one open end of the hollow fiber membrane to the inner diameter flow path of the hollow fiber membrane, and the fluid that has passed through the inner diameter flow path at the other open end is detected. It is characterized in that the film is identified as having a defective portion.
【００２１】また、中空糸膜の束を筒状のケース内に装
填し、ケース両端部において中空糸膜の束の端末を開口
した状態で封止する封止部を備えた中空糸膜モジュール
の検査方法において、前記ケース内部を加圧して中空糸
膜の欠陥部をつぶして膜の内径流路を閉塞させ、前記中
空糸膜モジュールの一方の封止部から中空糸膜に流体を
供給し、他方の封止部において前記中空糸膜を通過した
流体を検出し、流体が検出されない前記封止部の部位
を、欠陥部の存在する中空糸膜の開口端末の位置として
検出することを特徴とする。Further, a hollow fiber membrane module provided with a sealing portion for loading a bundle of hollow fiber membranes into a cylindrical case and sealing the ends of the bundle of hollow fiber membranes at both ends thereof in a state where the ends are opened. In the inspection method, the inside of the case is pressurized to crush the defective portion of the hollow fiber membrane to close the inner diameter flow path of the membrane, and to supply a fluid to the hollow fiber membrane from one sealing portion of the hollow fiber membrane module, Detecting a fluid that has passed through the hollow fiber membrane in the other sealing portion, and detecting a portion of the sealing portion where no fluid is detected as a position of an opening terminal of the hollow fiber membrane where a defective portion exists. I do.
【００２２】従って、加圧することでつぶれて中空糸膜
の内径流路を閉塞する欠陥部を備えた中空糸膜を特定す
ることが可能となる。Therefore, it is possible to specify a hollow fiber membrane having a defective portion which is crushed by applying pressure and closes the inner diameter flow path of the hollow fiber membrane.
【００２３】[0023]
【発明の実施の形態】以下に本発明による中空糸膜及び
中空糸膜モジュールの検査方法及びその装置を図示の実
施の形態に基づいて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS A method and an apparatus for inspecting a hollow fiber membrane and a hollow fiber membrane module according to the present invention will be described below based on the illustrated embodiment.
【００２４】図１は、検査対象となる中空糸膜モジュー
ル１であり、ハウジングケース２の内部に中空糸膜３を
備えている。中空糸膜３の端末はハウジングケース２の
両端部において、端末を開口した状態で封止部４ａ，４
ｂにより封止されている。FIG. 1 shows a hollow fiber membrane module 1 to be inspected. A hollow fiber membrane 3 is provided inside a housing case 2. The terminals of the hollow fiber membrane 3 are sealed at both ends of the housing case 2 with the terminals opened.
b.
【００２５】この中空糸膜モジュール１は膜の内側から
外側へろ過する内圧ろ過方式であり、両端の開口端５
ａ，５ｂのいずれか一方あるいは交互にろ過対象流体を
中空糸膜３の内径流路に流入させる。膜を透過した透過
流体はハウジングケース２の内部から流出口６ａ，６ｂ
を経て中空糸膜モジュール１から流出する。This hollow fiber membrane module 1 is of an internal pressure filtration system for filtering from the inside to the outside of the membrane.
The fluid to be filtered is caused to flow into the inner diameter flow path of the hollow fiber membrane 3 either or alternately, either a or 5b. The permeated fluid permeating the membrane flows out of the housing case 2 to the outlets 6a, 6b.
Flows out of the hollow fiber membrane module 1 through
【００２６】このような構成の中空糸膜モジュール１の
検査方法を図２に基づいて説明する。まず、中空糸膜モ
ジュール１内部の各中空糸膜３の切断部や破損箇所を検
査する通常の静圧的なリーク検査では、図２（ａ）のよ
うに流出口６ａから加圧エアＡ３を供給する（流出口６
ｂは蓋部材６ｃにより塞がれている。）この時、各中空
糸膜のうちいずれかに切断部や破損箇所（リーク箇所）
がある場合には、その部分から著しいエアの透過が起こ
る。このエアは、この中空糸膜の内径流路を通って開口
端５ａ及び５ｂの両方から流出することとなる。この流
量を測定または検知することで、リークの有無を検出す
ることが可能である。An inspection method of the hollow fiber membrane module 1 having such a configuration will be described with reference to FIG. First, in a normal static pressure leak test for inspecting a cut portion or a broken portion of each hollow fiber membrane 3 inside the hollow fiber membrane module 1, the pressurized air A3 is discharged from an outlet 6a as shown in FIG. Supply (Outlet 6
b is closed by the lid member 6c. ) At this time, any one of the hollow fiber membranes has a cut or broken part (leak)
If there is, significant air permeation will occur from that part. This air flows out from both the open ends 5a and 5b through the inner diameter flow path of the hollow fiber membrane. By measuring or detecting this flow rate, the presence or absence of a leak can be detected.
【００２７】各中空糸膜の開口端末から流出するエアの
検出方法は、図示される動圧力計１０の検出微細管１０
ａを開口端５ａの各中空糸膜の開口端末に近接させるこ
とにより検出することが可能である。また、上記静圧的
なリーク検査方法でのエアの検出方法では、測定器具に
頼らず、開口端末に水や中性洗剤水溶液を滴下して、そ
れが吹き飛ばされるか否かを目視で確認することによっ
ても可能である。The method of detecting the air flowing out from the opening end of each hollow fiber membrane is described by using a detection micro tube 10 of a dynamic pressure gauge 10 shown in FIG.
a can be detected by approaching a to the open end of each hollow fiber membrane at the open end 5a. In the method of detecting air in the static pressure leak inspection method, water or a neutral detergent aqueous solution is dropped on an opening terminal without relying on a measuring instrument, and whether or not it is blown off is visually checked. This is also possible.
【００２８】次に、本発明の課題としている静圧的な検
査では検出することの不可能な、内包的な欠陥を検出す
る方法を説明する。図２（ａ）において、ハウジングケ
ース２の内部を一定の圧力に加圧することで、各中空糸
膜の外周表面を加圧して膜の欠陥部をつぶすために、流
出口６ｂを蓋部材６ｃにより塞ぎ、流出口６ａから加圧
エアＡ３を流入させる。Next, a method for detecting an intrinsic defect which cannot be detected by the static pressure inspection, which is the subject of the present invention, will be described. In FIG. 2 (a), the outlet 6b is closed by a cover member 6c in order to pressurize the inside of the housing case 2 to a certain pressure and pressurize the outer peripheral surface of each hollow fiber membrane to crush the defective portion of the membrane. The pressurized air A3 is closed from the outlet 6a.
【００２９】この状態で検出エアＡ１を開口端５ｂから
各中空糸膜３の内径流路へと供給する。図２（ｂ）は加
圧された中空糸膜モジュール１の内部の状態を説明する
図である。正常な中空糸膜３ｃは各々の内径流路が確保
されているので反対側の開口端５ａから検出エアＡ２が
流出している。ところが、膜つぶれ等の欠陥部３ｂを持
つ欠陥部を有する中空糸膜３ａは、欠陥部３ｂが加圧エ
アＡ３の圧力によりつぶれてその内径流路を閉塞させて
しまい、検出エアＡ１が反対側の開口端５ａから流出し
ない。In this state, the detection air A1 is supplied from the open end 5b to the inner diameter flow path of each hollow fiber membrane 3. FIG. 2 (b) is a diagram illustrating the internal state of the hollow fiber membrane module 1 under pressure. In the normal hollow fiber membrane 3c, the detection air A2 flows out from the opening end 5a on the opposite side because the inner diameter flow path is secured. However, in the hollow fiber membrane 3a having a defective portion having a defective portion 3b such as a crushed film, the defective portion 3b is crushed by the pressure of the pressurized air A3 to block the inner diameter channel, and the detection air A1 is on the opposite side. Does not flow out of the open end 5a of the.
【００３０】先述した動圧力計１０の検出微細管１０ａ
を開口端５ａ表面を移動させ、検出エアの流出していな
い中空糸膜を見つけることで、欠陥部を有する中空糸膜
３ａを特定することが可能である。The detection fine tube 10a of the dynamic pressure gauge 10 described above.
Is moved on the surface of the open end 5a to find a hollow fiber membrane from which the detection air has not flown out, thereby making it possible to specify the hollow fiber membrane 3a having a defective portion.
【００３１】また、各々の中空糸膜の開口から検出エア
が流出しているか否かを検出する方法としては、動圧力
計による方法に限定されるものではなく様々な方法を採
用することが可能である。例えば、熱線流速計を検出微
細管１０ａの代わりに利用したり、特願平４−３１６４
８０に記載されるような、微粒子を含む検出エアを供給
して、この微粒子を光学的に検出する方法等（レーザビ
ーム走査式微粒子検出法）も採用することが可能であ
る。The method of detecting whether or not the detection air is flowing out of the opening of each hollow fiber membrane is not limited to the method using a dynamic pressure gauge, and various methods can be adopted. It is. For example, a hot-wire anemometer may be used in place of the detection fine tube 10a, or Japanese Patent Application No. 4-3164.
A method of supplying detection air containing fine particles and optically detecting the fine particles as described in 80 (laser beam scanning fine particle detection method) can also be adopted.
【００３２】そして、検出された欠陥部を有する中空糸
膜３ａを接着剤等で補修することで短時間の検査により
信頼性の高い中空糸膜モジュールを得る事ができる。By repairing the hollow fiber membrane 3a having the detected defect with an adhesive or the like, a highly reliable hollow fiber membrane module can be obtained by a short inspection.
【００３３】[0033]
【実施例】上記の実施の形態による効果を確認する為
に、本発明を適用した検査方法（加圧検査方式）による
検査と、従来の方法による検査（耐久検査方式）との比
較を行った。EXAMPLES In order to confirm the effects of the above embodiment, a comparison was made between an inspection by an inspection method (pressure inspection method) to which the present invention was applied and an inspection by a conventional method (durability inspection method). .
【００３４】（加圧検査方式）図２（ａ）に示した中空
糸膜モジュール１（有効長さ１ｍ，膜面積６ｍ2 ）に故
意に膜つぶれの欠陥部を有する中空糸膜の糸を一本混入
させて製作し、３ｋｇ／ｃｍ2 の加圧エアＡ３を供給し
た状態で、検出エアＡ１を開口端５ｂから供給し、反対
側の開口端５ａで流出する検出エアＡ２の流量レベルを
動圧力計１０により検出する。(Pressure Inspection Method) In the hollow fiber membrane module 1 (effective length 1 m, membrane area 6 m 2 ) shown in FIG. In a state where the compressed air A3 of 3 kg / cm 2 is supplied, the detection air A1 is supplied from the opening end 5b and the flow level of the detection air A2 flowing out at the opening end 5a on the opposite side is changed. It is detected by the pressure gauge 10.
【００３５】欠陥部を有する中空糸膜の糸は、開口端５
ａの検出エアＡ２の流量レベルが低い位置に開口を持つ
中空糸膜として特定され、この中空糸膜を補修した。The yarn of the hollow fiber membrane having the defective portion has an open end 5
The hollow fiber membrane was identified as a hollow fiber membrane having an opening at a position where the flow rate level of the detection air A2 was low, and this hollow fiber membrane was repaired.
【００３６】補修した後に、中空糸膜モジュール１に７
０℃の温水をそれぞれ２ｋｇ／ｃｍ2 の内圧と外圧とな
るように６０秒毎に繰り返して負荷させる耐久検査を行
ったが、６０時間経過後まではリークの発生は起こらな
かった。After the repair, the hollow fiber membrane module 1
A durability test was conducted in which hot water at 0 ° C. was repeatedly applied every 60 seconds so that the internal and external pressures became 2 kg / cm 2 , respectively, but no leak occurred until after 60 hours.
【００３７】このことは、短時間の加圧検査により、膜
つぶれの欠陥部は確実に検出され、しかもその他の中空
糸膜には欠陥が存在しなかったことが、短時間で確認さ
れたことを意味する。This means that a short time pressurization test was able to reliably detect a defect in the collapse of the membrane and to confirm in a short time that no defect was present in the other hollow fiber membranes. Means
【００３８】（耐久検査方式）加圧検査との比較を行う
意味で、上記と同じように故意に膜つぶれの欠陥部を有
する中空糸膜の糸を一本混入させて中空糸膜モジュール
を製作する。(Durability Inspection Method) A hollow fiber membrane module is manufactured by mixing one yarn of a hollow fiber membrane intentionally having a defective portion of the membrane collapse in the same manner as described above in the sense of comparing with the pressure inspection. I do.
【００３９】この中空糸膜モジュールに、７０℃の温水
をそれぞれ２ｋｇ／ｃｍ2 の内圧と外圧となるように６
０秒毎に繰り返して負荷させる耐久検査を行った。結果
は４時間経過した後に欠陥部からリークの発生が起き、
この欠陥部を有する中空糸膜の糸は、開口端５ａの検出
エアＡ２の流量レベルが低い位置に開口を持つ中空糸膜
として特定された。Warm water at 70 ° C. was applied to the hollow fiber membrane module at an internal pressure of 2 kg / cm 2 and an external pressure of 6 kg / cm 2.
A durability test was conducted in which a load was repeatedly applied every 0 seconds. As a result, after 4 hours, a leak occurred from the defective portion,
The yarn of the hollow fiber membrane having the defective portion was identified as a hollow fiber membrane having an opening at a position where the flow rate level of the detection air A2 at the opening end 5a is low.
【００４０】そして、この欠陥部を有する中空糸膜を補
修した後に、上記と同じ耐久検査を再度行ったところ、
６０時間経過後まではリークの発生は起こらなかった。After repairing the hollow fiber membrane having the defective portion, the same durability test as above was performed again.
No leak occurred until after 60 hours.
【００４１】このことは、膜つぶれの欠陥部は耐久検査
により欠陥として発現させて検出することが可能である
が、検出するまでの時間が長時間であり、しかも欠陥部
を欠陥として確実に発現させることが困難である。従っ
て、本発明による加圧検査方式と同等の信頼性を確保す
るためには長時間の検査が必要である。This means that a defective portion due to film collapse can be detected and developed as a defect by a durability test, but the time required for detection is long, and the defective portion is surely developed as a defect. It is difficult to let. Therefore, a long time inspection is required to ensure the same reliability as the pressure inspection method according to the present invention.
【００４２】[0042]
【発明の効果】本発明によれば、静圧的な検査では検出
することの不可能な内包的な欠陥、すなわち加圧するこ
とでつぶれて中空糸膜の内径流路を閉塞する欠陥部を備
えた中空糸膜を、短時間の検査により確実に特定するこ
とが可能となり、信頼性の高い中空糸膜及び中空糸膜モ
ジュールを得ることが可能となる。According to the present invention, there is provided an intrinsic defect which cannot be detected by a static pressure test, that is, a defect which is crushed by pressurization and closes the inner diameter flow path of the hollow fiber membrane. The hollow fiber membrane thus obtained can be reliably specified by a short-time inspection, and a highly reliable hollow fiber membrane and hollow fiber membrane module can be obtained.
【図１】図１は本発明による検査方法を適用する中空糸
膜モジュールの一例の一部断面切断説明図である。FIG. 1 is a partially cutaway explanatory view of an example of a hollow fiber membrane module to which an inspection method according to the present invention is applied.
【図２】図２は、中空糸膜モジュールの欠陥検査方法の
概要説明図。FIG. 2 is a schematic explanatory diagram of a defect inspection method for a hollow fiber membrane module.
１ 中空糸膜モジュール ２ ハウジングケース ３ 中空糸膜 ３ａ 欠陥部を有する中空糸膜 ３ｂ 欠陥部 ３ｃ 正常な中空糸膜 ４ａ，４ｂ 封止部 ５ａ，５ｂ 開口端 ６ａ，６ｂ 流出口 １０ 動圧力計 Ａ１，Ａ２ 検出エア Ａ３ 加圧エア DESCRIPTION OF SYMBOLS 1 Hollow fiber membrane module 2 Housing case 3 Hollow fiber membrane 3a Hollow fiber membrane having a defective part 3b Defective part 3c Normal hollow fiber membrane 4a, 4b Sealing part 5a, 5b Open end 6a, 6b Outflow port 10 Dynamic pressure gauge A1 , A2 Detection air A3 Pressurized air
Claims (2)
欠陥部をつぶして膜の内径流路を閉塞させ、 前記中空糸膜の一方の開口端から中空糸膜の内径流路に
流体を供給し、他方の開口端において前記内径流路を通
過した流体を検出し、 流体が検出されない中空糸膜を、膜に欠陥部の存在する
ものとして特定することを特徴とする中空糸膜の検査方
法。1. An inner peripheral flow path of a hollow fiber membrane is closed by pressing an outer peripheral surface of a hollow fiber membrane to crush a defective portion of the membrane and closing an inner diameter flow path of the membrane from one open end of the hollow fiber membrane. A hollow fiber membrane that detects the fluid that has passed through the inner diameter flow path at the other open end, and identifies a hollow fiber membrane in which no fluid is detected as having a defective portion in the membrane. Inspection method of membrane.
し、ケース両端部において中空糸膜の束の端末を開口し
た状態で封止する封止部を備えた中空糸膜モジュールの
検査方法において、 前記ケース内部を加圧して中空糸膜の欠陥部をつぶして
膜の内径流路を閉塞させ、 前記中空糸膜モジュールの一方の封止部から中空糸膜に
流体を供給し、他方の封止部において前記中空糸膜を通
過した流体を検出し、 流体が検出されない前記封止部の部位を、欠陥部の存在
する中空糸膜の開口端末の位置として検出することを特
徴とする中空糸膜モジュールの検査方法。2. A hollow fiber membrane module comprising a sealing portion for loading a bundle of hollow fiber membranes into a cylindrical case and sealing the ends of the bundle of hollow fiber membranes at both ends of the case with an open end. In the inspection method, the inside of the case is pressurized to crush the defective portion of the hollow fiber membrane to close the inner diameter flow path of the membrane, and to supply a fluid to the hollow fiber membrane from one sealing portion of the hollow fiber membrane module, Detecting the fluid that has passed through the hollow fiber membrane at the other sealing portion, and detecting the portion of the sealing portion where no fluid is detected as the position of the open end of the hollow fiber membrane where the defective portion exists. Inspection method for hollow fiber membrane modules.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02729596A JP3312838B2 (en) | 1996-01-22 | 1996-01-22 | Inspection method for hollow fiber membrane and inspection method for hollow fiber membrane module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02729596A JP3312838B2 (en) | 1996-01-22 | 1996-01-22 | Inspection method for hollow fiber membrane and inspection method for hollow fiber membrane module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09192457A JPH09192457A (en) | 1997-07-29 |
| JP3312838B2 true JP3312838B2 (en) | 2002-08-12 |
Family
ID=12217105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02729596A Expired - Fee Related JP3312838B2 (en) | 1996-01-22 | 1996-01-22 | Inspection method for hollow fiber membrane and inspection method for hollow fiber membrane module |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3312838B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005021068A1 (en) * | 2003-08-29 | 2005-03-10 | Toyo Boseki Kabushiki Kaisha | Highly water-permeable blood purifier of hollow-fiber membrane type |
| WO2006016575A1 (en) * | 2004-08-10 | 2006-02-16 | Toyo Boseki Kabushiki Kaisha | Highly water permeable hollow fiber membrane-type blood purifier and process for producing the same |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006305452A (en) * | 2005-04-27 | 2006-11-09 | Asahi Kasei Chemicals Corp | Filtration device |
| JP4816611B2 (en) * | 2007-09-27 | 2011-11-16 | 東レ株式会社 | Method for identifying damaged membrane in submerged hollow fiber membrane module |
| JP5089414B2 (en) * | 2008-02-04 | 2012-12-05 | 三菱レイヨン株式会社 | Hollow fiber membrane module leak inspection method |
| JP5399568B2 (en) * | 2011-08-31 | 2014-01-29 | 三菱レイヨン株式会社 | Inspection method for hollow fiber membrane module |
| WO2014050702A1 (en) * | 2012-09-28 | 2014-04-03 | 日本碍子株式会社 | Defect detection method for monolithic separation membrane structures, repair method, and monolithic separation membrane structures |
| CN107126844B (en) * | 2017-06-21 | 2023-03-14 | 天津职业技术师范大学 | Membrane filament flux test control system in water purification unit |
| CN116571090B (en) * | 2023-06-15 | 2025-11-21 | 广东省医疗器械质量监督检验所 | Hollow fiber membrane wire test unit and test device |
-
1996
- 1996-01-22 JP JP02729596A patent/JP3312838B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005021068A1 (en) * | 2003-08-29 | 2005-03-10 | Toyo Boseki Kabushiki Kaisha | Highly water-permeable blood purifier of hollow-fiber membrane type |
| US7442302B2 (en) | 2003-08-29 | 2008-10-28 | Toyo Boseki Kabushiki Kaisha | Highly water-permeable blood purifier of hollow-fiber membrane type |
| WO2006016575A1 (en) * | 2004-08-10 | 2006-02-16 | Toyo Boseki Kabushiki Kaisha | Highly water permeable hollow fiber membrane-type blood purifier and process for producing the same |
| RU2389513C2 (en) * | 2004-08-10 | 2010-05-20 | Нипро Корпорейшн | Blood purification apparatus such as highly porous hollow-fibre membranes and method for manufacturing thereof |
| JP4848278B2 (en) * | 2004-08-10 | 2011-12-28 | 東洋紡績株式会社 | Highly permeable hollow fiber membrane blood purifier and method for producing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09192457A (en) | 1997-07-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1194217B1 (en) | Method and apparatus for testing the integrity of filtering membranes | |
| JP3111101B2 (en) | Leak inspection method for membrane separation equipment | |
| JP3312838B2 (en) | Inspection method for hollow fiber membrane and inspection method for hollow fiber membrane module | |
| KR100303972B1 (en) | Device and Method for Detecting Leakage of Filter Film | |
| DE69329388T2 (en) | HOLLOW FIBER MODULE CONTROL SYSTEM | |
| US5507959A (en) | Apparatus for wetting, flushing and performing integrity checks on encapsulated PTFE filters | |
| CN114235657B (en) | Methods for testing filter media integrity | |
| US20130055792A1 (en) | Hygienic integrity test in ultrafiltration systems | |
| EP0096306A2 (en) | Filter element having microporous filter membrane | |
| MXPA04005154A (en) | A cleaning efficiency testing method and apparatus for a filter in a filtering system. | |
| JPH0523551A (en) | Perfection testing apparatus | |
| CN116868044A (en) | Integrity testing of dual filter capsules | |
| JP2000342936A (en) | Method and apparatus for detecting membrane damage in hollow fiber membrane filtration device | |
| JP2002320829A (en) | Inspection method of membrane module integrity | |
| JP3611877B2 (en) | Repair method of separation membrane module | |
| JPH11165046A5 (en) | ||
| Jornitz | Integrity testing | |
| JP2004219253A (en) | Leak inspection method for water purification cartridge | |
| JPH04142445A (en) | Completeness testing method | |
| JPH0975690A (en) | Water treatment filter damage detection method and apparatus, and water treatment apparatus including the apparatus | |
| CN111867706A (en) | Diaphragm assembly with limited defects and related methods | |
| JP3153829B2 (en) | Novel evaluation method of virus removal performance of polymer membrane module | |
| KR100503622B1 (en) | Apparatus and method for examining defect of hollow fiber membrane module | |
| JPH06117957A (en) | Leak testing method for hollow fiber membrane module | |
| JPH10253484A (en) | Balloon fluid leakage inspection method and measurement jig used therefor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20020423 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090531 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100531 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110531 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110531 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120531 Year of fee payment: 10 |
|
| LAPS | Cancellation because of no payment of annual fees |