JPS63147506A - Method for cleaning hollow yarn membrane filter - Google Patents
Method for cleaning hollow yarn membrane filterInfo
- Publication number
- JPS63147506A JPS63147506A JP29485786A JP29485786A JPS63147506A JP S63147506 A JPS63147506 A JP S63147506A JP 29485786 A JP29485786 A JP 29485786A JP 29485786 A JP29485786 A JP 29485786A JP S63147506 A JPS63147506 A JP S63147506A
- Authority
- JP
- Japan
- Prior art keywords
- fiber membrane
- hollow fiber
- gas
- cleaning
- water
- 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
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 101
- 238000004140 cleaning Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims description 18
- 239000007789 gas Substances 0.000 claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000000706 filtrate Substances 0.000 claims abstract description 13
- 238000005406 washing Methods 0.000 claims abstract description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000012510 hollow fiber Substances 0.000 claims description 74
- 238000001914 filtration Methods 0.000 claims description 20
- 230000001590 oxidative effect Effects 0.000 claims description 19
- 239000010419 fine particle Substances 0.000 claims description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims 3
- 150000001768 cations Chemical class 0.000 abstract description 5
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract 2
- 229910052757 nitrogen Inorganic materials 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 19
- 239000002699 waste material Substances 0.000 description 15
- 229910052742 iron Inorganic materials 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 239000011882 ultra-fine particle Substances 0.000 description 5
- 230000001186 cumulative effect Effects 0.000 description 3
- 241000026407 Haya Species 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- -1 iron ions Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000012113 quantitative test Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、中空糸膜フィルタの洗・漬方法に係り。[Detailed description of the invention] [Industrial application field] The present invention relates to a method for washing and soaking a hollow fiber membrane filter.
特に加圧洗浄する際に、中空糸膜内面又は外表面の付着
物を効率よく洗浄するのに好適な中空糸膜フィルタの洗
浄方法に関するものである。In particular, the present invention relates to a method for cleaning a hollow fiber membrane filter that is suitable for efficiently cleaning deposits on the inner or outer surface of the hollow fiber membrane during pressure cleaning.
中空糸膜フィルタは、単位容積当りの膜面積が大きくと
れるため、ろ過処理装置のコンパクト化が計れ、また除
去性能がすぐれていることより。Hollow fiber membrane filters have a large membrane area per unit volume, so the filtration equipment can be made more compact, and they have excellent removal performance.
各種膜処理装置に広く用いられている。しかしこのよう
な用途において、ろ過処理時間の経過とともに膜表面に
処理水に含まれる除去対象物の付着量が増加し、次第に
膜のろ過動率が低下する問題が起こる。Widely used in various membrane processing equipment. However, in such applications, the problem arises that as the filtration treatment time elapses, the amount of substances to be removed contained in the treated water increases on the membrane surface, and the filtration rate of the membrane gradually decreases.
そこで、この問題に対し提案された膜の洗浄方法がいわ
ゆるろ過方向と逆方向への物質の透過作用による洗浄で
ある。従来の中空糸膜フィルタの洗浄方法としては、例
えば特開昭５３−１０８８８２号に記載の、圧縮空気を
使い気泡と振動で付着微粒子を剥離させる方法や特開昭
６０−１９００２号に記載の、ガスと液体を利用した洗
浄に中空糸膜の側方及び下方から気泡を発生させて中空
糸膜のまわりの液体を撹拌させる作用を加えた方法で、
ろ通函に付着した微粒子を剥離させ、膜のろ過動率を回
復させていた。Therefore, a membrane cleaning method proposed to solve this problem is so-called cleaning by permeation of substances in the opposite direction to the filtration direction. Conventional methods for cleaning hollow fiber membrane filters include, for example, the method described in JP-A-53-108882, in which adhered fine particles are peeled off using bubbles and vibration using compressed air, and the method described in JP-A-60-19002. This is a cleaning method that uses gas and liquid to generate bubbles from the sides and bottom of the hollow fiber membrane to stir the liquid around the hollow fiber membrane.
The fine particles adhering to the filter box were peeled off and the filtration rate of the membrane was restored.
上記従来技術では、ろ過処理過程で、中空糸膜内面を洗
浄水が通過する際に中空糸膜が帯ｔｌｔ呪象を起こし、
その帯電と洗浄ガスの影響により、中空糸膜ではろ過処
理できなかったイオン状の物質や中空糸のポア径以下の
超微粒子が洗浄によって起こす挙動についての配慮がさ
れていなかった。In the above conventional technology, during the filtration process, when the cleaning water passes through the inner surface of the hollow fiber membrane, the hollow fiber membrane causes a belt TLT phenomenon.
No consideration was given to the behavior of ionic substances that could not be filtered by hollow fiber membranes and ultrafine particles smaller than the hollow fiber pore diameter due to cleaning due to the influence of the electrostatic charge and cleaning gas.
すなわち第２図に示すように、中空糸膜２は、内部の水
の流動３１により、膜内面にマイナスの電荷３２を帯び
る。ここで中空糸膜２は非導電性の物質であるため、一
種のコンデンサとみなせ、電荷を保持する働きをもつ。That is, as shown in FIG. 2, the inner surface of the hollow fiber membrane 2 is charged with a negative charge 32 due to the flow 31 of water inside the membrane. Here, since the hollow fiber membrane 2 is a non-conductive substance, it can be regarded as a kind of capacitor, and has the function of retaining electric charge.
そこに膜で捕捉処理されなかったろ液中に含まれる陽イ
オン物質３３は静電引力で引っばられている状態にある
。この状態において、第３図に示すように従来の圧縮空
気３４による洗浄を施すと、その空気に含まれる酸素及
び酸化剤物質により、陽イオンは酸化されて。The cationic substances 33 contained in the filtrate that have not been captured by the membrane are being pulled together by electrostatic attraction. In this state, when conventional cleaning is performed using compressed air 34 as shown in FIG. 3, the cations are oxidized by the oxygen and oxidizing agent contained in the air.
酸化物３５として析出し、膜内面に付着する。さらに、
中空糸の微細孔をすりぬけてきた超微粒子も圧縮酸化さ
れ同様に付着する。従って、この方法によると洗浄回数
が増すごとに中空糸膜内面に微粒子がたまり、初期膜差
圧が上昇し、次第にろ過動率が下がるという問題があっ
た。It precipitates as oxide 35 and adheres to the inner surface of the film. moreover,
Ultrafine particles that have passed through the micropores of the hollow fibers are also compressed and oxidized and adhered in the same way. Therefore, this method has the problem that as the number of washings increases, fine particles accumulate on the inner surface of the hollow fiber membrane, the initial membrane pressure difference increases, and the filtration rate gradually decreases.
本発明の目的は、かかる従来の難点を解消するため、陽
イオン及び超微粒子の酸化を防止する優れた洗浄方法を
提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide an excellent cleaning method that prevents oxidation of cations and ultrafine particles in order to overcome these conventional problems.
上記目的は、中空糸膜フィルタ中の該中空糸膜の外側又
は内側に、ろ過水又は洗浄水と共にガスを圧入すること
により該ろ過水又は洗浄水を前記中空糸膜に流し、該中
空糸膜のろ過処理面に付着しているクラッドなどの微粒
子を除去する中空糸膜フィルタの洗浄方法において、前
記ガスとじて非酸化性ガスを用いることにより達成され
る。The above purpose is to flow the filtrate or wash water through the hollow fiber membrane by pressurizing gas together with the filtrate or wash water into the outside or inside of the hollow fiber membrane in the hollow fiber membrane filter. A method for cleaning a hollow fiber membrane filter for removing particulates such as crud adhering to the filtration surface of a hollow fiber membrane filter is achieved by using a non-oxidizing gas as the gas.
非酸化性ガスは、物質を実質的に酸化させないガスであ
る。洗浄にこのガスを利用することにより、ろ液中に含
まれる陽イオンや超微粒子は酸化されて析出することが
ない。従って中空糸膜内面を汚染せずに、中空糸膜の外
面の付着微粒子の剥離が行なわれる。そして、非酸化性
ガスは、従来の圧縮空気と同様の扱い方ができる。さら
に、ろ液に存在するイオン状物質や超微粒子以外にも、
例えば接触する装置等にも、腐食等の悪影響を示さない
ため極めて有効である。A non-oxidizing gas is a gas that does not substantially oxidize substances. By using this gas for cleaning, cations and ultrafine particles contained in the filtrate will not be oxidized and precipitated. Therefore, fine particles adhering to the outer surface of the hollow fiber membrane can be removed without contaminating the inner surface of the hollow fiber membrane. The non-oxidizing gas can be handled in the same way as conventional compressed air. Furthermore, in addition to ionic substances and ultrafine particles present in the filtrate,
For example, it is extremely effective because it does not show any adverse effects such as corrosion on equipment that comes into contact with it.
本発明に用いられる非酸化性ガスとしては窒素ガス、炭
酸ガス、不活性ガス又は水素ガスなどがある。Examples of the non-oxidizing gas used in the present invention include nitrogen gas, carbon dioxide gas, inert gas, and hydrogen gas.
又、本発明でいう中空糸膜は膜素材を問わず、例えばポ
リオレフィン等の疎水性膜やポリビニルアルコール等の
親水性膜それぞれ有効である。さらに孔径や内径、外径
等の膜構造にもかかわりなく、あらゆる中空糸膜に対し
て有効である。Moreover, the hollow fiber membrane referred to in the present invention is effective regardless of the membrane material, for example, a hydrophobic membrane such as polyolefin or a hydrophilic membrane such as polyvinyl alcohol. Furthermore, it is effective for all hollow fiber membranes, regardless of membrane structure such as pore size, inner diameter, outer diameter, etc.
本発明において、洗浄方法としては、例えば上記に非酸
化性ガスにてろ過方向とは逆方向から、加圧したガスを
送り込み、ろ過水又は洗浄水を逆流させて中空糸膜を通
過させ、さらに必要ならば、ガスをも通過させ、ろ過処
理面（膜面）に付着している微粒子を剥離させる。その
後、廃液中に、ガスを送り込み、廃液を撹拌させて剥離
した微粒子を取り除き、かつ膜面をすすぐことにより完
了する。In the present invention, the cleaning method includes, for example, feeding pressurized non-oxidizing gas from the opposite direction to the filtration direction, causing the filtered water or cleaning water to flow back through the hollow fiber membrane, and further If necessary, gas is also passed through to peel off fine particles adhering to the filtration surface (membrane surface). Thereafter, gas is fed into the waste liquid to agitate the waste liquid to remove detached fine particles, and the membrane surface is rinsed to complete the process.
以下、本発明の一実施例を第１図により説明する。第１
図は本発明の基本システムである処理液のろ過および洗
浄装置を示す配管系統図を示している。本図において、
中空糸膜２は、中空糸膜フィルタ１に上部を密接固定さ
せて装着されている。An embodiment of the present invention will be described below with reference to FIG. 1st
The figure shows a piping system diagram showing a processing liquid filtration and cleaning device, which is the basic system of the present invention. In this figure,
The hollow fiber membrane 2 is attached to the hollow fiber membrane filter 1 with its upper portion tightly fixed.
ろ過処理時には、廃液は、廃液配管３を経て、中空糸膜
フィルタ１に導入される。そして、中空糸膜２によりろ
過され、ろ過処理されたろ液がろ液排出配管１１より排
出される。このとき、バルブ４．５．６が開状態である
。また廃液の流量及び中空糸膜２の差圧はそれぞれ流量
計７および圧力計８に計示される。廃液の濃度は、廃液
サンプリング配管９により、８１す定される。またろ液
の濃度はろ液サンプリング配管１０により測定される。During the filtration process, the waste liquid is introduced into the hollow fiber membrane filter 1 via the waste liquid piping 3. The filtrate that has been filtered through the hollow fiber membrane 2 is then discharged from the filtrate discharge pipe 11 . At this time, valve 4.5.6 is open. Further, the flow rate of the waste liquid and the differential pressure of the hollow fiber membrane 2 are measured by a flow meter 7 and a pressure gauge 8, respectively. The concentration of the waste liquid is determined 81 by the waste liquid sampling pipe 9. Further, the concentration of the filtrate is measured by the filtrate sampling pipe 10.
洗浄システムとして、非酸化性ガスタンク１６と、圧縮
空気タンク１７を有し、それぞれ圧力制御されている。The cleaning system includes a non-oxidizing gas tank 16 and a compressed air tank 17, each of which is pressure-controlled.
洗浄時には、以下の操作が交互に行なわれる。During cleaning, the following operations are performed alternately.
（ａ）バルブ１４．１５を開状態にし、非酸化性ガスタ
ンク１６より、圧縮ガスを、中空糸膜フィルタ１の上部
へ導入する。このとき、中空糸膜フィルタ１の上部２０
に存在していたろ過は、その圧力により、中空糸膜２の
内側より外側へ透過する。さらに透過した液体は、オー
バーフロー配管１８を通り、オーバーブロータンク１９
に捕集される。(a) Valve 14.15 is opened and compressed gas is introduced into the upper part of hollow fiber membrane filter 1 from non-oxidizing gas tank 16. At this time, the upper part 20 of the hollow fiber membrane filter 1
The filtration that existed in the hollow fiber membrane 2 permeates from the inside to the outside due to the pressure. The liquid that has further permeated passes through the overflow pipe 18 and passes through the overblower tank 19.
is collected by.
本発明においては、必要に応じて下記（ｂ）の操作を行
なうことにより洗浄効果を高めることができる。In the present invention, the cleaning effect can be enhanced by performing the operation (b) below as necessary.
（ｂ）前記（ａ）の操作後、剥離した微粒子の排出と中
空糸膜２の外面洗浄であるが、これは、バルブ２２．１
５を開状態にし、補給水タンク２３より、中空糸膜フィ
ルタ１に液体を導入する。(b) After the operation in (a) above, the exfoliated particulates are discharged and the outer surface of the hollow fiber membrane 2 is cleaned.
5 is opened, and liquid is introduced into the hollow fiber membrane filter 1 from the make-up water tank 23.
また、は中空糸膜フィルタ１に廃液を存在させておく。Further, waste liquid is allowed to exist in the hollow fiber membrane filter 1.
そこで、バルブ２２を閉じ、バルブ２１を開にして、圧
縮空気タンク１７より圧縮空気を中空糸膜フィルタ下部
２８より導入し、気泡の、上昇特性を利用して、中空糸
膜２の表面洗浄を行う。Therefore, the valve 22 is closed, the valve 21 is opened, and compressed air is introduced from the compressed air tank 17 into the hollow fiber membrane filter lower part 28, and the surface of the hollow fiber membrane 2 is cleaned using the rising property of air bubbles. conduct.
このとき上昇した空気はオーバーフロー配管１８を通り
オーバーフロータンク１９に捕集される。The air rising at this time passes through the overflow pipe 18 and is collected in the overflow tank 19.
（ｂ）の洗浄が行なわれた後、微粒子を含んだ洗浄液は
、バルブ５．２４を開にして、排液回収配管２５より、
排液回収タンク２６に回収される。一方、第１図と同様
の装置を設け、その装置には非酸化性ガスを圧縮空気に
変え、鉄イオンや酸化鉄を含む模擬廃液を使用した比較
試験を行った。通水条件は下記とした。After the cleaning in (b) is carried out, the cleaning liquid containing fine particles is discharged from the drain liquid collection pipe 25 by opening the valve 5.24.
The waste liquid is collected in the waste liquid collection tank 26. On the other hand, a comparative test was conducted using a device similar to that shown in FIG. 1, replacing the non-oxidizing gas with compressed air, and using a simulated waste liquid containing iron ions and iron oxide. The water flow conditions were as follows.
・廃Ｍｆｉ度：ｌＯ〜５０ｐｐｍ
（ＦｅＳＯ，及びａ−Ｆｅ２０．等を含む）・溶存酸素
濃度：５０ｐｐｂ以下
・導電率：０．１５μＳ／■以下
・水温：３０℃
上記廃液を用い、ろ過、洗浄のくり返し試験を行なった
。・Waste Mfi degree: lO ~ 50 ppm (including FeSO, a-Fe20., etc.) ・Dissolved oxygen concentration: 50 ppb or less ・Electric conductivity: 0.15 μS/■ or less ・Water temperature: 30°C Filter and wash using the above waste liquid Repeated tests were conducted.
本発明では、前記（ａ）及び（ｂ）の操作を複数回交互
に行なうこともできる。In the present invention, the operations (a) and (b) can also be performed alternately multiple times.
第４図は圧縮空気を利用した洗浄による初期差圧の経時
変化を、又、第５図は非酸化性ガスを利用した洗浄によ
る初期差圧の経時変化を示すグラフである。縦軸にろ過
差圧、横軸に中空糸膜の外面の単位面積当りの累積鉄負
荷量を示す。図から明らかなように、圧縮空気を使った
洗浄では、累積鉄負荷量が１５０ （ｇ／ボ）を超える
と初期差圧の回復が悪く（図中、Ａ）なっている。一方
、非酸化性ガスを使った場合は、累積鉄負荷量が５００
（ｇ／ｍ）を超えても初期差圧の顕著な上昇はみられな
かった。（図中、Ｂ）さらに、試験中随時、中空糸膜を
サンプリングし、膜内面の付着鉄量を定量した。FIG. 4 is a graph showing the change over time in the initial pressure difference due to cleaning using compressed air, and FIG. 5 is a graph showing the change over time in the initial pressure difference due to cleaning using non-oxidizing gas. The vertical axis shows the filtration differential pressure, and the horizontal axis shows the cumulative iron load per unit area of the outer surface of the hollow fiber membrane. As is clear from the figure, in cleaning using compressed air, recovery of the initial differential pressure becomes poor (A in the figure) when the cumulative iron load exceeds 150 (g/bo). On the other hand, when non-oxidizing gas is used, the cumulative iron load is 500
(g/m), no significant increase in initial pressure difference was observed. (B in the figure) Furthermore, the hollow fiber membrane was sampled at any time during the test, and the amount of iron adhering to the inner surface of the membrane was quantified.
第６図はその比較定量試験、結果を示すグラフであり、
横軸に中空糸膜の外面付着鉄量、縦軸に内面付着鉄量を
示す。非酸化圧縮空気を利用した場合、外面付着鉄量に
対する内面付着量４０は、圧縮空気を利用した場合の内
面付着＋ｆ４１に比べ、極めて少なかった。Figure 6 is a graph showing the comparative quantitative test and results.
The horizontal axis shows the amount of iron attached to the outer surface of the hollow fiber membrane, and the vertical axis shows the amount of iron attached to the inner surface. When non-oxidizing compressed air was used, the amount of iron deposited on the inner surface (40) relative to the amount of iron deposited on the outer surface was extremely small compared to the amount of iron deposited on the inner surface +f41 when compressed air was used.
第７図は本発明を適用した原子カプラントにおける復水
ろ過システムの例を示す一実施例であり、原子カプラン
トの概略系統図である。ここで、不・鈍物を含む復水は
、復水導入配管７４を通り、中空糸膜フィルタ１にてろ
過処理され、出口水配管５６を通り、給水となる。FIG. 7 is an embodiment showing an example of a condensate filtration system in an atomic coupler to which the present invention is applied, and is a schematic system diagram of the atomic coupler. Here, the condensate containing waste and obtuse substances passes through the condensate introduction pipe 74, is filtered by the hollow fiber membrane filter 1, and passes through the outlet water pipe 56 to become water supply.
第８図は中空糸膜フィルタ１の系統図である。FIG. 8 is a system diagram of the hollow fiber membrane filter 1.
中空糸膜フィルタ１の洗浄時には、洗浄装置として、非
酸化性ガスを貯蔵する非酸化性ガス圧入タンク１６を用
い、以下の操作を交互に行って洗浄を行う。When cleaning the hollow fiber membrane filter 1, a non-oxidizing gas pressure tank 16 that stores a non-oxidizing gas is used as a cleaning device, and the following operations are performed alternately.
（１）バルブ８３を閉、バルブ８２を開とし、エアスク
ラビング配管７３を通して、非酸化ガスを、中空糸膜フ
ィルタ１の下部より導入し、膜の外表面の洗浄を行う。(1) Close the valve 83, open the valve 82, and introduce non-oxidizing gas from the lower part of the hollow fiber membrane filter 1 through the air scrubbing pipe 73 to clean the outer surface of the membrane.
（２）バルブ８３を開、バルブ８２を閉とし、空気浄化
フィルタ７２を介して、一定圧のガスを、エアサージ配
管８４を通して、膜の内面から外面へ圧力を利用して通
過させ、膜の外面に付着した不純物を剥離させる。(2) Open the valve 83, close the valve 82, and pass gas at a constant pressure through the air purification filter 72 and the air surge piping 84 from the inner surface of the membrane to the outer surface using pressure. Removes impurities attached to the surface.
さらに、ドレン配管７７、ベント配管７９より不純物を
含んだ、洗浄廃液及び洗浄空気の排出を行い、配管８１
を経て、ラド施設へ回収される。Furthermore, cleaning waste liquid and cleaning air containing impurities are discharged from the drain pipe 77 and the vent pipe 79, and the pipe 81
After that, it is collected at the RAD facility.
本発明によれば、洗浄時に中空糸膜の表面に新たな微粒
子を析出させて付着させることがなく。According to the present invention, new fine particles are not deposited and attached to the surface of the hollow fiber membrane during cleaning.
中空糸膜に付着した微粒子°を十分に除去することがで
きるので、中空糸膜のろ過動率の向上および膜寿命延長
の効果がある。Since fine particles attached to the hollow fiber membrane can be sufficiently removed, the filtration rate of the hollow fiber membrane can be improved and the life of the membrane can be extended.
第１図は本発明の一実施例になる洗浄装置を夕Ｈえた中
空糸膜フィルタの系統図、第２図はろ過処理時の中空糸
膜の内部の模式図、第３図は圧縮空気による洗浄時の中
空糸膜の内部の模式図、第４図、第５図及び第６図は本
発明の洗浄効果を示すグラフ、第７図及び第８図は本発
明の装置を適用した原子カプラントの系統図である。
１・・・中空糸膜フィルタ、２・・・中空糸膜、１６・
・・非酸化性ガスタンク、１９・・・洗浄水オーバーフ
ロータンク、３２・・・中空糸膜内面のマイナス電荷、
代理人 弁理士 小 川 勝 男
第 ／１２］
早 ４Ｕ３
早 、５７
累桶鉄＊衡＋ け、澹り
第 ６２
コ
膜、５′）面付前ト量 （柘、−り
第 ７ ２
５ｏ 占２
に７ ＾３Fig. 1 is a system diagram of a hollow fiber membrane filter equipped with a cleaning device according to an embodiment of the present invention, Fig. 2 is a schematic diagram of the inside of the hollow fiber membrane during filtration processing, and Fig. 3 is a system diagram of a hollow fiber membrane filter equipped with a cleaning device according to an embodiment of the present invention. A schematic diagram of the inside of a hollow fiber membrane during cleaning, Figures 4, 5 and 6 are graphs showing the cleaning effect of the present invention, and Figures 7 and 8 are atomic couplants to which the apparatus of the present invention is applied. This is a system diagram of 1... Hollow fiber membrane filter, 2... Hollow fiber membrane, 16.
...Non-oxidizing gas tank, 19...Washing water overflow tank, 32...Negative charge on the inner surface of the hollow fiber membrane,
Agent Patent Attorney Katsutoshi Ogawa /12] Haya 4U3 Haya, 57 Cuiotetsu*Hori + Ke, Samurai No. 62 Co-membrane, 5') Imposition front weight (Tsuge, -ri No. 7 2 5o fortune) 2 to 7 ^3
Claims (1)
、ろ過水又は洗浄水と共にガスを圧入することにより該
ろ過水又は洗浄水を前記中空糸膜に流し、該中空糸膜の
ろ過処理面に付着しているクラッドなどの微粒子を除去
する中空糸膜フィルタの洗浄方法において、前記ガスと
して非酸化性ガスを用いることを特徴とする中空糸膜フ
ィルタの洗浄方法。 ２、非酸化性ガスは、窒素ガス、炭酸ガス、不活性ガス
又は水素ガスから選ばれるものであることを特徴とする
特許請求の範囲第１項記載の中空糸膜フィルタの洗浄方
法。 ３、中空糸膜フィルタ中の該中空糸膜の外側又は内側に
、ろ過水又は洗浄水と共にガスを圧入することによりそ
のガス圧により該ろ過水又は洗浄水を前記中空糸膜に流
し、該中空糸膜のろ過処理面に付着しているクラッドな
どの微粒子を除去する中空糸膜フィルタの洗浄方法にお
いて、前記ガスとして非酸化性ガスを用い、そのガス圧
により前記ろ過水又は洗浄水を前記中空糸膜の内面から
外面方向に流すことを特徴とする中空糸膜フィルタの洗
浄方法。 ４、中空糸膜フィルタ中の該中空糸膜の外側又は内側に
、ろ過水又は洗浄水と共にガスを圧入することによりそ
のガス圧により該ろ過水又は洗浄水を前記中空糸膜に流
し、該中空糸膜のろ過処理面に付着しているクラッドな
どの微粒子を除去する中空糸膜フィルタの洗浄方法にお
いて、前記ガスとして非酸化性ガスを用い、（ａ）前記
ガス圧により前記ろ過水又は洗浄水を前記中空糸膜の内
面から外面方向に流す操作及び（ｂ）前記ガス圧により
前記ろ過水又は洗浄水を前記中空糸膜の外面から内面方
向に流す操作とを行なうことを特徴とする中空糸膜フィ
ルタの洗浄方法。 ５、非酸化性ガスは、窒素ガス、炭酸ガス、不活性ガス
又は水素ガスから選ばれるものであることを特徴とする
特許請求の範囲第４項記載の中空糸膜フィルタの洗浄方
法。[Claims] 1. By pressurizing gas together with filtrated water or washing water into the outside or inside of the hollow fiber membrane in a hollow fiber membrane filter, the filtrated water or washing water is caused to flow through the hollow fiber membrane, A method for cleaning a hollow fiber membrane filter for removing particulates such as crud adhering to the filtration surface of the hollow fiber membrane, characterized in that a non-oxidizing gas is used as the gas. . 2. The method for cleaning a hollow fiber membrane filter according to claim 1, wherein the non-oxidizing gas is selected from nitrogen gas, carbon dioxide gas, inert gas, or hydrogen gas. 3. By pressurizing gas together with filtrated water or washing water into the outside or inside of the hollow fiber membrane in the hollow fiber membrane filter, the filtrated water or washing water is caused to flow through the hollow fiber membrane by the gas pressure. In a hollow fiber membrane filter cleaning method for removing particulates such as crud adhering to the filtration surface of a fiber membrane, a non-oxidizing gas is used as the gas, and the filtrate or cleaning water is transferred to the hollow fiber by the gas pressure. A method for cleaning a hollow fiber membrane filter characterized by flowing water from the inner surface to the outer surface of the fiber membrane. 4. By pressurizing gas together with filtrated water or washing water into the outside or inside of the hollow fiber membrane in the hollow fiber membrane filter, the filtrated water or washing water is caused to flow through the hollow fiber membrane by the gas pressure, and the hollow fiber membrane is In a hollow fiber membrane filter cleaning method for removing fine particles such as crud adhering to the filtration surface of a fiber membrane, a non-oxidizing gas is used as the gas, and (a) the filtrate or cleaning water is purified by the gas pressure. and (b) flowing the filtered water or washing water from the outer surface of the hollow fiber membrane toward the inner surface using the gas pressure. How to clean membrane filters. 5. The method for cleaning a hollow fiber membrane filter according to claim 4, wherein the non-oxidizing gas is selected from nitrogen gas, carbon dioxide gas, inert gas, or hydrogen gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29485786A JPS63147506A (en) | 1986-12-12 | 1986-12-12 | Method for cleaning hollow yarn membrane filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29485786A JPS63147506A (en) | 1986-12-12 | 1986-12-12 | Method for cleaning hollow yarn membrane filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63147506A true JPS63147506A (en) | 1988-06-20 |
Family
ID=17813150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29485786A Pending JPS63147506A (en) | 1986-12-12 | 1986-12-12 | Method for cleaning hollow yarn membrane filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63147506A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005007324A (en) * | 2003-06-19 | 2005-01-13 | Daicen Membrane Systems Ltd | Method for washing separation membrane module |
| US7220358B2 (en) | 2004-02-23 | 2007-05-22 | Ecolab Inc. | Methods for treating membranes and separation facilities and membrane treatment composition |
| US7247210B2 (en) | 2004-02-23 | 2007-07-24 | Ecolab Inc. | Methods for treating CIP equipment and equipment for treating CIP equipment |
| US7392811B2 (en) | 2004-02-23 | 2008-07-01 | Ecolab Inc. | Delivery head for multiple phase treatment composition, vessel including a delivery head, and method for treating a vessel interior surface |
| WO2009000693A1 (en) * | 2007-06-28 | 2008-12-31 | L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Method of treating water |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58183906A (en) * | 1982-04-23 | 1983-10-27 | Jgc Corp | Method and apparatus for filtrating liquid containing suspended substance |
| JPS6022906A (en) * | 1983-07-18 | 1985-02-05 | Asahi Chem Ind Co Ltd | Washing method of porous membrane |
| JPS62155906A (en) * | 1985-12-28 | 1987-07-10 | Mitsubishi Rayon Eng Co Ltd | Method for washing hollow yarn filter module |
-
1986
- 1986-12-12 JP JP29485786A patent/JPS63147506A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58183906A (en) * | 1982-04-23 | 1983-10-27 | Jgc Corp | Method and apparatus for filtrating liquid containing suspended substance |
| JPS6022906A (en) * | 1983-07-18 | 1985-02-05 | Asahi Chem Ind Co Ltd | Washing method of porous membrane |
| JPS62155906A (en) * | 1985-12-28 | 1987-07-10 | Mitsubishi Rayon Eng Co Ltd | Method for washing hollow yarn filter module |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005007324A (en) * | 2003-06-19 | 2005-01-13 | Daicen Membrane Systems Ltd | Method for washing separation membrane module |
| US7220358B2 (en) | 2004-02-23 | 2007-05-22 | Ecolab Inc. | Methods for treating membranes and separation facilities and membrane treatment composition |
| US7247210B2 (en) | 2004-02-23 | 2007-07-24 | Ecolab Inc. | Methods for treating CIP equipment and equipment for treating CIP equipment |
| US7392811B2 (en) | 2004-02-23 | 2008-07-01 | Ecolab Inc. | Delivery head for multiple phase treatment composition, vessel including a delivery head, and method for treating a vessel interior surface |
| WO2009000693A1 (en) * | 2007-06-28 | 2008-12-31 | L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Method of treating water |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4540490A (en) | Apparatus for filtration of a suspension | |
| JPH07290094A (en) | Method and device for disposal of liquid fluid containing dissolved pollutant | |
| JPH0231200A (en) | Backwash method of hollow-string film filter | |
| JPS63147506A (en) | Method for cleaning hollow yarn membrane filter | |
| JPH0217924A (en) | Method for backwashing hollow yarn membrane filter apparatus | |
| JP2000140585A (en) | Operation of membrane separation apparatus, and membrane separation apparatus | |
| JP2008526496A (en) | Treatment of wastewater streams containing surfactants. | |
| JPS6393310A (en) | Oil-water separator provided with regeneration function | |
| JP3620577B2 (en) | Cleaning method for ultrapure water production system | |
| CN206692478U (en) | Electronics industry nitrogen-containing wastewater system for regenerating and recycling | |
| JP2968069B2 (en) | Magnetic separation device | |
| CN105060589B (en) | Sewage treatment equipment | |
| JPS63302910A (en) | Method for washing porous filter | |
| JPH01180205A (en) | Operation of hollow yarn membrane filter device | |
| JPS58183906A (en) | Method and apparatus for filtrating liquid containing suspended substance | |
| JPS63171605A (en) | Carbon dioxide cleaning method for hollow yarn membrane filter | |
| CN213327009U (en) | Filtering purification retrieval and utilization device after sewage treatment | |
| JPS6287205A (en) | Method for washing hollow yarn membrane filter | |
| JPH07328622A (en) | Water purifying filtration system | |
| JPS6058222A (en) | Regeneration of porous filter membrane | |
| JPH03131311A (en) | Method for concentrating backwashing water of precoat type filter | |
| JPH0557161A (en) | Method for regenerating hollow fiber filter medium | |
| JP2000218109A (en) | Treatment of waste water | |
| JPS61157306A (en) | Method for washing hollow yarn membrane | |
| JPS6219300A (en) | Method for recovering and regenerating water-soluble temper rolling solution |