JP2006247444A - Hollow fiber membrane module and its production method - Google Patents
Hollow fiber membrane module and its production method Download PDFInfo
- Publication number
- JP2006247444A JP2006247444A JP2005063450A JP2005063450A JP2006247444A JP 2006247444 A JP2006247444 A JP 2006247444A JP 2005063450 A JP2005063450 A JP 2005063450A JP 2005063450 A JP2005063450 A JP 2005063450A JP 2006247444 A JP2006247444 A JP 2006247444A
- Authority
- JP
- Japan
- Prior art keywords
- hollow fiber
- fiber membrane
- membrane module
- case housing
- membrane bundle
- 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
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
本発明は、中空糸膜モジュールの製造方法に関する。 The present invention relates to a method for producing a hollow fiber membrane module.
液出入口を有するケースハウジング内に所要数の中空糸膜束を収容し、ケースハウジング内への液（原水、透過水等）の出入りを前記液出入口のみにより行うタイプの中空糸膜モジュールがあり、このようなタイプのものは、比較的大型のモジュールに適用されることが多い。 There is a type of hollow fiber membrane module in which a required number of hollow fiber membrane bundles are accommodated in a case housing having a liquid inlet / outlet, and liquid (raw water, permeated water, etc.) enters and exits into the case housing only by the liquid inlet / outlet, Such types are often applied to relatively large modules.
しかし、このようなタイプの中空糸膜モジュールを用いてろ過運転するとき、液出入口から逆圧洗浄水等が出入りすることになるため、液出入口に面した位置にある中空糸膜束のみが、逆圧洗浄水等の出入りに伴う圧力を受け続ける結果、複数の中空糸膜束が揺れて、互いに衝突を繰り返すことになる。 However, when performing filtration using such a type of hollow fiber membrane module, backwash water or the like will enter and exit from the liquid inlet / outlet, so only the hollow fiber membrane bundle at the position facing the liquid inlet / outlet, As a result of continuing to receive the pressure accompanying the entry and exit of backwash water or the like, the plurality of hollow fiber membrane bundles sway and repeatedly collide with each other.
このため、ケースハウジングと中空糸膜束は、複数の中空糸膜束が揺れ動くことがないように、必要に応じて支持部材を介して、接着剤で接着一体化されている。 For this reason, the case housing and the hollow fiber membrane bundle are bonded and integrated with an adhesive via a support member as necessary so that the plurality of hollow fiber membrane bundles do not move.
中空糸膜束は、製造後からケースハウジングに収容するまでの間、湿潤剤として湿潤剤を含む水中に浸漬した後、熱風乾燥後に乾燥状態で保管されており、この保管中、中空糸膜束中に一定量の湿潤剤が含有されている。 The hollow fiber membrane bundle is stored in a dry state after being dried in hot air after being immersed in water containing a wetting agent as a wetting agent until it is housed in the case housing after production. During this storage, the hollow fiber membrane bundle is stored. A certain amount of wetting agent is contained therein.
そして、このように一定量の湿潤剤が含有された中空糸膜束を用いて、中空糸膜モジュールを製造した場合、モジュール内の中空糸膜束は一定量の湿潤剤を含んだ状態のままで使用されることになる。 When a hollow fiber membrane module is manufactured using a hollow fiber membrane bundle containing a certain amount of wetting agent, the hollow fiber membrane bundle in the module remains in a state containing a certain amount of wetting agent. Will be used in.
中空糸膜モジュールを使用するとき、使用状況に応じて加熱殺菌を頻繁に行う場合があるが、このときに、中空糸膜間の接着部にひびが入り割れる（接着部に隙間ができる）ことがある。 When using a hollow fiber membrane module, heat sterilization may be frequently performed depending on the usage situation, but at this time, cracks may break in the bonded part between the hollow fiber membranes (a gap is created in the bonded part) There is.
特許文献１には、端部付近に比して、それ以外の部分に膜乾燥阻止剤が多く存在するモジュールと、阻止剤溶液（A）に浸漬後、膜束の少なくとも端部を水洗して阻止剤を洗い流し、ついで端部のみを低濃度の阻止剤溶液（B）で処理する中空糸膜モジュールの製造方法が開示されている。 In Patent Document 1, compared with the vicinity of the end portion, a module in which there are more membrane drying inhibitors in other portions, and after immersion in the inhibitor solution (A), at least the end portion of the membrane bundle is washed with water. A method for producing a hollow fiber membrane module is disclosed in which the inhibitor is washed away, and then only the end portion is treated with a low concentration inhibitor solution (B).
特許文献２には、膜孔保持剤であるグリセリンやPEGの中空糸への付着量が多いと、そのOH基とウレタン接着剤が反応しウレタンオリゴマーが溶出するので、製造時にグリセリン浸漬槽から乾燥工程に至る間、中空糸引取りローラー上に付着したグリセリンをローラー状のスポンジで拭き取り、過剰のグリセリンを除去する人工透析用の中空糸膜モジュールの製造方法が開示されている。
本発明は、湿潤剤を含む中空糸膜モジュールを加熱殺菌処理した場合でも、中空糸膜間の接着部に割れが生じない中空糸膜モジュール及びその製造方法を提供することを課題とする。特許文献１、２には、これらの課題は開示されていない。 An object of the present invention is to provide a hollow fiber membrane module and a method for producing the same, in which a crack is not generated in an adhesive portion between hollow fiber membranes even when a hollow fiber membrane module containing a wetting agent is heat sterilized. Patent Documents 1 and 2 do not disclose these problems.
本発明者は、上記したような中空糸膜間の接着部に割れが生じるという問題は、中空糸膜束に含まれるグリセリンの含有量が、特定量より多い場合に発生しやすい傾向があることを見出した。 The present inventor has a tendency that the problem that cracks occur in the bonded portion between the hollow fiber membranes as described above tends to occur when the content of glycerin contained in the hollow fiber membrane bundle is larger than a specific amount. I found.
本発明は、課題の解決手段として、
ケースハウジングとケースハウジング内に収容された中空糸膜束を有し、前記ケースハウジングの内壁面と前記中空糸膜束の少なくとも一端部が接着剤で接着一体化されている中空糸膜モジュールであり、
前記中空糸膜束の端部における湿潤剤量が、膜１ｇ当たり０．６ｇ以下である中空糸膜モジュールを提供する。
As a means for solving the problems, the present invention
A hollow fiber membrane module having a case housing and a hollow fiber membrane bundle accommodated in the case housing, wherein an inner wall surface of the case housing and at least one end of the hollow fiber membrane bundle are bonded and integrated with an adhesive ,
Provided is a hollow fiber membrane module in which the amount of wetting agent at the end of the hollow fiber membrane bundle is 0.6 g or less per 1 g of membrane.
０．６ｇより多いと、中空糸膜と膜の間の接着部に割れが生じやすくなる。より好ましくは０．４ｇ以下である。 When the amount is more than 0.6 g, cracks are likely to occur at the bonded portion between the hollow fiber membrane and the membrane. More preferably, it is 0.4 g or less.
湿潤剤としては、グリセリン、ラウリル硫酸ナトリウム、エチレングリコール、プロピレングリコール、アミルアルコール等が挙げられるが、その中でも、グリセリンが好ましい。 Examples of the wetting agent include glycerin, sodium lauryl sulfate, ethylene glycol, propylene glycol, and amyl alcohol. Among them, glycerin is preferable.
本発明は、他の課題の解決手段として、ケースハウジングとケースハウジング内に収容された中空糸膜束を有し、前記ケースハウジングの内壁面と前記中空糸膜束の少なくとも一端部が接着剤で接着一体化されている中空糸膜モジュールの製造方法であり、
前記中空糸膜束が、ケースハウジングの収容前には湿潤剤としてのグリセリンを含有しているものであり、ケースハウジングに収容前において少なくとも接着剤で接着される中空糸膜束端部を水洗して、端部におけるグリセリン含有量が、膜１ｇ当たり０．６ｇ以下に低減される工程を含む、中空糸膜モジュールの製造方法を提供する。
As a means for solving another problem, the present invention has a case housing and a hollow fiber membrane bundle accommodated in the case housing, and an inner wall surface of the case housing and at least one end of the hollow fiber membrane bundle are made of an adhesive. It is a manufacturing method of a hollow fiber membrane module that is bonded and integrated,
The hollow fiber membrane bundle contains glycerin as a wetting agent before housing the case housing, and at least the end portion of the hollow fiber membrane bundle bonded to the case housing with an adhesive before washing is washed with water. And the manufacturing method of a hollow fiber membrane module including the process by which the glycerol content in an edge part is reduced to 0.6 g or less per 1 g of membranes is provided.
また、他の課題の他の解決手段として、少なくとも接着剤で接着される中空糸膜束端部が水洗される工程が、膜束端部を水に浸漬した後、乾燥するものである、請求項４記載の中空糸膜モジュールの製造方法を提供する。 Further, as another means for solving other problems, the step of washing at least the hollow fiber membrane bundle end bonded with an adhesive is soaked in water and then dried. The manufacturing method of the hollow fiber membrane module of claim | item 4 is provided.
このようにケースハウジングと接着剤で接着される中空糸膜束の端部を水洗し、グリセリン含有量を低減することにより、加熱殺菌による熱を受けた場合でも、中空糸膜同士の間の接着部にひびが入り割れることがない。 In this way, the end of the hollow fiber membrane bundle bonded to the case housing with the adhesive is washed with water, and the glycerin content is reduced, so that even when heat is applied by heat sterilization, the adhesion between the hollow fiber membranes There are no cracks in the parts.
中空糸膜束の水洗方法としては、流水で洗い流す方法でもよいが、水の入った容器中に、中空糸膜束の少なくとも接着剤で接着される端部又は全体を浸漬する方法が好ましい。 As a method for rinsing the hollow fiber membrane bundle, a method of rinsing with running water may be used, but a method of immersing at least an end portion or the whole of the hollow fiber membrane bundle bonded with an adhesive in a container containing water is preferable.
本発明の中空糸膜モジュールは、予め中空糸膜束のグリセリン含有量が低減されたものを用いているため、中空糸膜モジュールを加熱殺菌した場合であっても、中空糸膜同士の間の接着部に割れ（隙間）が生じることがない。 Since the hollow fiber membrane module of the present invention uses the one in which the glycerin content of the hollow fiber membrane bundle has been reduced in advance, even when the hollow fiber membrane module is heat sterilized, the hollow fiber membrane module is not between the hollow fiber membranes. There is no crack (gap) in the bonded part.
よって、本発明の中空糸膜モジュールは、ろ過運転の合間に加熱殺菌処理を繰り返した場合であっても、長期間安定したろ過運転を継続することができる。 Therefore, the hollow fiber membrane module of the present invention can continue a stable filtration operation for a long time even when the heat sterilization treatment is repeated between filtration operations.
本発明の中空糸膜モジュールの構造自体は公知のものであり、例えば、特開２００４−８９８００号公報の図１〜図５に示すような構造にすることができる。 The structure itself of the hollow fiber membrane module of the present invention is known, and for example, the structure shown in FIGS. 1 to 5 of JP-A-2004-89800 can be used.
中空糸膜束は、直径が１ｍｍ前後〜数ｍｍ程度の中空糸膜が数百〜数千本束ねられたものであり、中空糸膜の材質は特に制限されず、公知のものを用いることができ、好ましくは耐熱性の高いポリサルホン系樹脂、ポリエーテルサルホン系樹脂が用いられる。 The hollow fiber membrane bundle is a bundle of hundreds to thousands of hollow fiber membranes having a diameter of around 1 mm to several mm, and the material of the hollow fiber membrane is not particularly limited, and a known one can be used. Preferably, polysulfone-based resins and polyethersulfone-based resins having high heat resistance are used.
中空糸膜束は、製造後からケースハウジングに収容するまでの間、湿潤剤としてグリセリンを含む水中に浸漬した後、熱風乾燥後に乾燥状態で保管される。このため、この保管中に中空糸膜束中に一定量のグリセリンが含有保持されている。そして、中空糸膜束に一定量含有保持されたグリセリンが、加熱殺菌時の熱により揮発乃至は滲み出すことにより、中空糸膜と膜の間の接着部に割れを引き起こすものと考えられる。 The hollow fiber membrane bundle is stored in a dry state after hot air drying after being immersed in water containing glycerin as a wetting agent until it is housed in the case housing. For this reason, a certain amount of glycerin is contained and held in the hollow fiber membrane bundle during storage. And it is thought that the glycerin contained and held in a certain amount in the hollow fiber membrane bundle volatilizes or oozes out by heat at the time of heat sterilization, thereby causing a crack in the bonded portion between the hollow fiber membrane and the membrane.
よって、本発明では、少なくとも接着剤で接着される中空糸膜束の端部を水洗することで、グリセリン含有量を、膜１ｇ当たり０．６ｇ以下、好ましくは０．４ｇ以下に低減させる。 Therefore, in the present invention, at least the end of the hollow fiber membrane bundle bonded with an adhesive is washed with water, whereby the glycerin content is reduced to 0.6 g or less, preferably 0.4 g or less, per 1 g of membrane.
水洗方法としては、少なくとも接着剤で接着させる中空糸膜束の端部又は中空糸膜束全体を水中に浸漬する方法が好ましい。 As the water washing method, a method of immersing at least the end of the hollow fiber membrane bundle to be bonded with an adhesive or the entire hollow fiber membrane bundle in water is preferable.
水中に浸漬するときの条件は、水温５〜３０℃、好ましくは１０〜２５℃で、１０秒〜２時間、好ましくは２０秒〜６０秒が良い。 The conditions for immersion in water are 5 to 30 ° C., preferably 10 to 25 ° C., and 10 to 2 hours, preferably 20 to 60 seconds.
水中に浸漬しているとき、水を攪拌機で攪拌する方法、水にエアー吹き込む方法、水を循環させて流れを形成する方法、ホース等で流水を吹き付ける方法、及びこれらの方法を組み合わせた方法等を併用して、洗浄効率を高めることもできる。 A method of stirring water with a stirrer when immersed in water, a method of blowing air into water, a method of forming a flow by circulating water, a method of blowing running water with a hose, etc., a method combining these methods, etc. Can also be used in combination to increase the cleaning efficiency.
実施例１
内径０．８ｍｍ、外径１．３ｍｍ、長さ１２３０ｍｍのポリエーテルサルホン系中空糸２１００本からなる中空糸膜束を、３０％のグリセリン水溶液に４０℃で４秒間浸漬後、熱風乾燥した。
Example 1
A hollow fiber membrane bundle composed of 2100 polyethersulfone hollow fibers having an inner diameter of 0.8 mm, an outer diameter of 1.3 mm, and a length of 1230 mm was immersed in a 30% aqueous glycerin solution at 40 ° C. for 4 seconds, and then dried with hot air.
この中空糸膜束のグリセリン含有量は、中空糸膜１ｇ当たり１．０３ｇであった（グリセリン含有量は、次式：
（中空糸膜総質量(g)−中空糸膜絶乾質量(g)）／中空糸膜絶乾質量(g)、から求めた。
The glycerin content of the hollow fiber membrane bundle was 1.03 g per 1 g of the hollow fiber membrane (the glycerin content is represented by the following formula:
It was determined from (total hollow fiber membrane mass (g) -absolute dry fiber mass (g)) / absolute dry fiber mass (g).
次に、上記中空糸膜束の両端部２００ｍｍを水温１６℃の水道水が満たされた容器に１０分間浸漬した後取り出して、熱風乾燥機内で温度５５℃、時間１５時間の条件で乾燥した。このときの中空糸膜束両端部のグリセリン量は、中空糸膜１ｇ当たり０．１５ｇであった。 Next, 200 mm of both ends of the hollow fiber membrane bundle was immersed in a container filled with tap water having a water temperature of 16 ° C. for 10 minutes, and then taken out and dried in a hot air dryer at a temperature of 55 ° C. for 15 hours. The amount of glycerin at both ends of the hollow fiber membrane bundle at this time was 0.15 g per 1 g of the hollow fiber membrane.
次に、ケースハウジングとして、内径８０ｍｍ、外径８９ｍｍ、長さ１０６６ｍｍのポリサルホン製のものを用意し、このケースハウジング内に水で浸漬処理した上記中空糸膜束を密に充填した。 Next, a case made of polysulfone having an inner diameter of 80 mm, an outer diameter of 89 mm, and a length of 1066 mm was prepared as the case housing, and the hollow fiber membrane bundle immersed in water was densely filled in the case housing.
その後、ケースハウジングの上下の開口部付近と中空糸膜束の両端部の接触面（それぞれ長さ３０ｍｍずつ）を、遠心シール機（東邦機械工業（株）社製，横型遠心成型機）により、エポキシ系接着剤で接着封止した。 After that, the contact surfaces (each 30 mm in length) near the upper and lower openings of the case housing and the both ends of the hollow fiber membrane bundle are separated by a centrifugal sealing machine (manufactured by Toho Machine Industry Co., Ltd., horizontal centrifugal molding machine). Adhesion was sealed with an epoxy adhesive.
作製した中空糸膜モジュールを用いて、以下の耐久性試験を実施した。耐久性評価は９８℃の熱水を１５分間通水した後、１５℃の水を１５分間通水する工程を１回とし、この工程を繰り返した。そして、中空糸膜モジュールの中空糸膜同士の間の接着部に割れ（隙間）が生じるかの評価を行った結果、２００回目でも中空糸膜同士の間の接着部には割れ（隙間）が見当たらなかった。 The following durability test was implemented using the produced hollow fiber membrane module. Durability evaluation was conducted by passing 98 ° C hot water for 15 minutes and then passing 15 ° C water for 15 minutes once. And as a result of evaluating whether a crack (gap) occurs in the adhesion part between the hollow fiber membranes of the hollow fiber membrane module, the crack (gap) is present in the adhesion part between the hollow fiber membranes even at the 200th time. I didn't find it.
実施例２
中空糸膜束両端部のグリセリン量が中空糸膜１ｇ当たり０．５７ｇである以外は実施例１と全く同じにして中空糸膜モジュールを作製した。耐久性評価も実施例１と同条件で実施した結果、２００回目でも中空糸膜と膜の間の接着部に割れ（隙間）が見当たらなかった。
Example 2
A hollow fiber membrane module was produced in exactly the same manner as in Example 1 except that the amount of glycerin at both ends of the hollow fiber membrane bundle was 0.57 g per 1 g of the hollow fiber membrane. Durability evaluation was also performed under the same conditions as in Example 1. As a result, no cracks (gap) were found in the bonded portion between the hollow fiber membranes even at the 200th time.
実施例３
中空糸膜束両端部のグリセリン量が中空糸膜１ｇ当たり０．３６ｇである以外は実施例１と全く同じにして中空糸膜モジュールを作製した。耐久性評価も実施例１と同条件で実施した結果、２００回目でも中空糸膜と膜の間の接着部に割れ（隙間）が見当たらなかった。
Example 3
A hollow fiber membrane module was produced in exactly the same manner as in Example 1 except that the amount of glycerin at both ends of the hollow fiber membrane bundle was 0.36 g per 1 g of the hollow fiber membrane. Durability evaluation was also performed under the same conditions as in Example 1. As a result, no cracks (gap) were found in the bonded portion between the hollow fiber membranes even at the 200th time.
実施例４
中空糸膜束両端部のグリセリン量が中空糸膜１ｇ当たり０．０５ｇである以外は実施例１と全く同じにして中空糸膜モジュールを作製した。耐久性評価も実施例１と同条件で実施した結果、２００回目でも中空糸膜と膜の間の接着部に割れ（隙間）が見当たらなかった。
Example 4
A hollow fiber membrane module was produced in the same manner as in Example 1 except that the amount of glycerin at both ends of the hollow fiber membrane bundle was 0.05 g per 1 g of the hollow fiber membrane. Durability evaluation was also performed under the same conditions as in Example 1. As a result, no cracks (gap) were found in the bonded portion between the hollow fiber membranes even at the 200th time.
比較例１
中空糸膜束のグリセリン量が、中空糸膜１ｇ当たり１．０３ｇである以外は実施例１と全く同じにして中空糸膜モジュールを作製した。耐久性評価を実施例１と同条件で実施した結果、１００回目以内で中空糸膜と膜の間の接着部に割れ（隙間）が確認された。
Comparative Example 1
A hollow fiber membrane module was produced in the same manner as in Example 1 except that the amount of glycerin in the hollow fiber membrane bundle was 1.03 g per 1 g of the hollow fiber membrane. As a result of performing durability evaluation on the same conditions as Example 1, the crack (gap) was confirmed in the adhesion part between a hollow fiber membrane within the 100th time.
比較例２
中空糸膜束のグリセリン量が、中空糸膜１ｇ当たり０．８７ｇ/ｇポリマーである以外は実施例１と全く同じにして中空糸膜モジュールを作製した。耐久性評価を実施例１と同条件で実施した結果、１００回目以内で中空糸膜と膜の間の接着部に割れ（隙間）が確認された。
Comparative Example 2
A hollow fiber membrane module was produced in the same manner as in Example 1 except that the amount of glycerin in the hollow fiber membrane bundle was 0.87 g / g polymer per 1 g of the hollow fiber membrane. As a result of performing durability evaluation on the same conditions as Example 1, the crack (gap) was confirmed in the adhesion part between a hollow fiber membrane within the 100th time.
Claims (6)
前記中空糸膜束の端部における湿潤剤量が、膜１ｇ当たり０．６ｇ以下である中空糸膜モジュール。 A hollow fiber membrane module having a case housing and a hollow fiber membrane bundle accommodated in the case housing, wherein an inner wall surface of the case housing and at least one end of the hollow fiber membrane bundle are bonded and integrated with an adhesive ,
The hollow fiber membrane module whose wetting agent amount in the edge part of the said hollow fiber membrane bundle is 0.6 g or less per 1g of membranes.
前記中空糸膜束が、ケースハウジングに収容前には湿潤剤としてのグリセリンを含有しているものであり、ケースハウジングに収容前において少なくとも接着剤で接着される中空糸膜束端部を水洗して、端部におけるグリセリン含有量が、膜１ｇ当たり０．６ｇ以下に低減される工程を含む、中空糸膜モジュールの製造方法。 Production of a hollow fiber membrane module having a case housing and a hollow fiber membrane bundle accommodated in the case housing, wherein an inner wall surface of the case housing and at least one end of the hollow fiber membrane bundle are bonded and integrated with an adhesive Is the way
The hollow fiber membrane bundle contains glycerin as a wetting agent before being housed in the case housing, and at least the end portion of the hollow fiber membrane bundle bonded to the case housing with an adhesive before being housed is washed with water. And the manufacturing method of a hollow fiber membrane module including the process in which glycerin content in an edge part is reduced to 0.6 g or less per 1 g of membranes.
The manufacturing method of the hollow fiber membrane module of Claim 4 or 5 whose wetting agent is glycerol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005063450A JP2006247444A (en) | 2005-03-08 | 2005-03-08 | Hollow fiber membrane module and its production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005063450A JP2006247444A (en) | 2005-03-08 | 2005-03-08 | Hollow fiber membrane module and its production method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2006247444A true JP2006247444A (en) | 2006-09-21 |
Family
ID=37088480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2005063450A Pending JP2006247444A (en) | 2005-03-08 | 2005-03-08 | Hollow fiber membrane module and its production method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2006247444A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020059752A1 (en) | 2018-09-20 | 2020-03-26 | ダイセン・メンブレン・システムズ株式会社 | Porous hollow fiber membrane |
| CN114950144A (en) * | 2022-04-29 | 2022-08-30 | 苏州富淼膜科技有限公司 | Membrane filament cleaning method before hollow fiber column type ultrafiltration membrane pouring |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6253414A (en) * | 1985-08-29 | 1987-03-09 | Nitto Electric Ind Co Ltd | Production of aromatic polysulfone hollow fiber membrane |
| JP2000271451A (en) * | 1999-03-25 | 2000-10-03 | Toray Ind Inc | Hollow fiber membrane module, production of hollow fiber membrane and production of hollow fiber membrane module |
| JP2001190934A (en) * | 2000-01-12 | 2001-07-17 | Toyobo Co Ltd | Hollow fiber membrane module with a little effluent |
-
2005
- 2005-03-08 JP JP2005063450A patent/JP2006247444A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6253414A (en) * | 1985-08-29 | 1987-03-09 | Nitto Electric Ind Co Ltd | Production of aromatic polysulfone hollow fiber membrane |
| JP2000271451A (en) * | 1999-03-25 | 2000-10-03 | Toray Ind Inc | Hollow fiber membrane module, production of hollow fiber membrane and production of hollow fiber membrane module |
| JP2001190934A (en) * | 2000-01-12 | 2001-07-17 | Toyobo Co Ltd | Hollow fiber membrane module with a little effluent |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020059752A1 (en) | 2018-09-20 | 2020-03-26 | ダイセン・メンブレン・システムズ株式会社 | Porous hollow fiber membrane |
| CN114950144A (en) * | 2022-04-29 | 2022-08-30 | 苏州富淼膜科技有限公司 | Membrane filament cleaning method before hollow fiber column type ultrafiltration membrane pouring |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7674382B2 (en) | Method of cleaning fouled and/or scaled membranes | |
| TWI415668B (en) | Method of cleaning fouled or scaled membranes | |
| WO2015046582A1 (en) | Composite semipermeable membrane and method for manufacturing same | |
| US10106920B2 (en) | Production method of superclean wiper | |
| JP2009543675A (en) | Improved membrane monopersulfate treatment | |
| KR20150124952A (en) | Composite semipermeable membrane | |
| JP2010519010A (en) | Tapering method for toothbrush bristle material to improve production efficiency | |
| JP2007289940A5 (en) | ||
| CN108187408A (en) | A kind of room temperature cleaning method of filter element | |
| US11045771B2 (en) | Composite semipermeable membrane and method for producing same | |
| CN105983342A (en) | Method for cleaning ultrafiltration membrane | |
| JP2006247444A (en) | Hollow fiber membrane module and its production method | |
| CN110605027A (en) | Alkaline cleaning solution, acidic cleaning solution and ultrafiltration membrane cleaning method | |
| CN107149879A (en) | Clean the cleaning method of the reverse osmosis membrane polluted by polyacrylamide | |
| JP7167442B2 (en) | Composite semipermeable membrane and manufacturing method thereof | |
| JP2010188253A (en) | Hollow fiber porous membrane and method for treating water | |
| JP5138572B2 (en) | Hollow fiber membrane manufacturing method and hollow fiber membrane drying apparatus | |
| KR20170126359A (en) | Method for estimating cleaning efficiency of membrane | |
| JP5176499B2 (en) | Porous hollow fiber membrane and method for producing the same, and hollow fiber membrane module | |
| JPWO2018168641A1 (en) | Cleaning liquid, cleaning agent and cleaning method for wetted parts | |
| JP7254309B2 (en) | Method for recovering desalination performance of reverse osmosis membrane | |
| CN104815561A (en) | Reverse osmosis membrane cleaning method and cleaning fluid | |
| JP2009214023A (en) | Preservation method of solid-liquid separation membrane | |
| JP4108227B2 (en) | Hydrophilic filtration membrane | |
| JP2005144305A (en) | Hollow fiber membrane filtration module and method for washing the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A625 | Written request for application examination (by other person) |
Free format text: JAPANESE INTERMEDIATE CODE: A625 Effective date: 20070926 |
|
| A977 | Report on retrieval |
Effective date: 20091118 Free format text: JAPANESE INTERMEDIATE CODE: A971007 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20091215 |
|
| A02 | Decision of refusal |
Effective date: 20100427 Free format text: JAPANESE INTERMEDIATE CODE: A02 |