JP2509204Y2 - Hollow fiber membrane module - Google Patents

Hollow fiber membrane module

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Publication number
JP2509204Y2
JP2509204Y2 JP1990025776U JP2577690U JP2509204Y2 JP 2509204 Y2 JP2509204 Y2 JP 2509204Y2 JP 1990025776 U JP1990025776 U JP 1990025776U JP 2577690 U JP2577690 U JP 2577690U JP 2509204 Y2 JP2509204 Y2 JP 2509204Y2
Authority
JP
Japan
Prior art keywords
hollow fiber
fiber membrane
partition wall
cap
air
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 - Lifetime
Application number
JP1990025776U
Other languages
Japanese (ja)
Other versions
JPH03119424U (en
Inventor
伸治 田原
敏一 黒田
肇 大谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nitto Denko Corp
Original Assignee
Nitto Denko Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nitto Denko Corp filed Critical Nitto Denko Corp
Priority to JP1990025776U priority Critical patent/JP2509204Y2/en
Publication of JPH03119424U publication Critical patent/JPH03119424U/ja
Application granted granted Critical
Publication of JP2509204Y2 publication Critical patent/JP2509204Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【考案の詳細な説明】 〈産業上の利用分野〉 本考案は中空糸膜モジュールに関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a hollow fiber membrane module.

〈従来の技術〉 膜モジュール中、中空糸膜束を用いたモジュールにお
いては、単位容積当りの膜面積を大きくとれるので、モ
ジュールのコンパクト化に有利である。特に、縦型中空
糸膜モジュールにおいては、単位設置スペース当りの処
理能力の向上に有利であり、例えば、原子力発電所での
水処理(特に、BWR型原子力発電所での復水浄化系水処
理)や半導体用の超純水製造(特に、超純水製造プロセ
スにおけるRO処理の前処理)の分野において重視されて
いる。
<Prior Art> Among the membrane modules, a module using a hollow fiber membrane bundle has a large membrane area per unit volume, which is advantageous for making the module compact. In particular, the vertical hollow fiber membrane module is advantageous in improving the treatment capacity per unit installation space. For example, water treatment in a nuclear power plant (particularly, condensate purification system water treatment in a BWR-type nuclear power plant). ) And semiconductor ultrapure water production (especially pretreatment of RO treatment in ultrapure water production process).

第4図は従来公知の縦型(懸垂式)中空糸膜モジュー
ルの一例を示している。第4図において、1′,…は多
数本の中空糸膜、2′,…は中空糸膜束内に配した連通
管、4′は保護筒である。31′並びに32′はそれぞれ上
部隔壁並びに下部隔壁であり、上部隔壁の上面において
中空糸膜の上端並びに連通管の上端がそれぞれ開口し、
下部隔壁の下面において中空糸膜の下端並びに連通管の
下端がそれぞれ開口している。7′は保護筒の下端に取
付けたキャップ、9′は保護筒の下端部に取付けた空気
受、5′は保護筒に設けた原水供給孔、9′は空気導入
孔、10′はスケール排出孔である。
FIG. 4 shows an example of a conventionally known vertical (suspended) hollow fiber membrane module. In FIG. 4, 1 ', ... Numerals are a large number of hollow fiber membranes, 2', ... Are communication tubes arranged in a hollow fiber membrane bundle, and 4'is a protective tube. 31 'and 32' are an upper partition wall and a lower partition wall, respectively, and the upper end of the hollow fiber membrane and the upper end of the communication pipe are opened on the upper surface of the upper partition wall,
The lower end of the hollow fiber membrane and the lower end of the communication pipe are open on the lower surface of the lower partition wall. 7'is a cap attached to the lower end of the protective cylinder, 9'is an air receiver attached to the lower end of the protective cylinder, 5'is a raw water supply hole provided in the protective cylinder, 9'is an air introduction hole, and 10 'is a scale discharge. It is a hole.

上記中空糸膜モジュールは第4図に示すように仕切板
11′により、圧力容器12′内に懸垂して使用する。而し
て、原水入口13′から主に原水供給孔5′を経て保護筒
4′内に原水が圧入され、該原水が中空糸膜1′,…に
よって濾過され、その透過水の一部が直接上方向に向
い、残部が下方向に導かれてキャップ7′で一たん集水
のうえ、連通管2′を経て上方向に向う。このように、
透過水が上方向と下方向とに分けて流動されるので、中
空糸膜の内径が細いにもかかわらず、中空糸膜内での圧
損を低くでき、透過効率を高くできる。
The hollow fiber membrane module has a partition plate as shown in FIG.
11 'is used by suspending it in the pressure vessel 12'. Thus, the raw water is pressed from the raw water inlet 13 'mainly through the raw water supply hole 5' into the protective cylinder 4 ', the raw water is filtered by the hollow fiber membranes 1', ... Directly in the upward direction, the remaining portion is guided in the downward direction, water is collected once by the cap 7 ', and then upwards via the communication pipe 2'. in this way,
Since the permeated water flows in the upward and downward directions separately, the pressure loss in the hollow fiber membrane can be reduced and the permeation efficiency can be increased even though the hollow fiber membrane has a small inner diameter.

濾過処理においては、濾過操作の継続に伴い、膜表面
へのスケールの付着により濾過能力が低下していくの
で、適時に膜を洗浄することが不可欠である。上記のモ
ジュールにおいては、空気導入ノズル14′から空気を空
気受8′を経て空気導入孔9′からモジュール内に導入
する方法、すなわちエアースクラビング洗浄が採用され
ている。この方法においては、モジュール内に導入した
空気を気泡にしてモジュール内を上昇させ、これを保護
筒上部の孔5′(原水供給孔)から排出し、この上昇気
泡によって原水の対流を惹起し、中空糸膜1′,…の動
揺によって中空糸膜表面のスケール層を剥離し、剥離し
たスケールをスケール排出孔10′,…より排除すること
を企図している。
In the filtration treatment, it is indispensable to wash the membrane in a timely manner, because the filtration performance is reduced due to the adhesion of scale to the membrane surface as the filtration operation is continued. In the above module, the method of introducing air from the air introducing nozzle 14 'into the module through the air receiver 8'and the air introducing hole 9', that is, air scrubbing cleaning is adopted. In this method, the air introduced into the module is made into bubbles to rise in the module, and this is discharged from the hole 5 '(raw water supply hole) in the upper part of the protective cylinder, and the rising bubbles cause convection of raw water, It is intended that the scale layer on the surface of the hollow fiber membrane is peeled off by shaking of the hollow fiber membranes 1 ', ... And the peeled scale is removed from the scale discharge holes 10'.

〈解決しようとする課題〉 上記したように、第4図に示す中空糸膜モジュールに
おいては、中空糸膜内で透過水が上下の両方に向けて流
動されるため、片端側(上端側)にのみ向け流動される
形式の中空糸膜モジュールに較べて中空糸膜内での透過
水流動抵抗が極めて低くそれだけ透過水流量が大とな
り、従って、膜単位面積当たりの透過流束が大となる結
果、膜表面へのスケール付着量も多くなる。従って、ス
ケール除去のためのエアースクラビグ洗浄には、中空糸
膜内で透過水を上端側の一端側のみに向け流動させる方
式の中空糸膜モジュールに較べ、より厳重な洗浄が必要
である。
<Problems to be Solved> As described above, in the hollow fiber membrane module shown in FIG. 4, since permeated water flows in both directions in the hollow fiber membrane, the permeated water flows toward one side (upper side). The permeated water flow resistance inside the hollow fiber membrane is much lower than that of the hollow fiber membrane module that is only directed to flow, and the permeated water flow rate is accordingly large, resulting in a large permeation flux per unit area of the membrane. The amount of scale adhered to the film surface also increases. Therefore, the air scrubbing cleaning for scale removal requires more rigorous cleaning than the hollow fiber membrane module in which the permeated water is made to flow only toward one end side on the upper end side in the hollow fiber membrane.

しかしながら、従来では、第4図に示すように空気導
入孔9′を保護筒4′の下部側面に設けており、モジュ
ール内に導入された空気の殆どが中空糸膜束1′,…の
最外周と保護筒4′の内周との間を経て上昇してしま
い、上昇気流による原水の対流が保護筒4′の内周面近
傍に限られてしまうので、中空糸膜束1′,…の中央部
付近では満足な洗浄を行い難い。また、第4図に示す中
空糸膜モジュールにおいては、スケール付着量が多いた
めに、エアースクラビング洗浄時での剥離スケール量も
多量であるが、従来では、第4図に示すように、スケー
ル排出孔10′を下部隔壁32′の上面より空気導入孔9′
を経た位置に設けてあり、スケール排出孔10′の位置が
下部隔壁32′の上面よりもかなり高い位置になるので、
上記剥離したスケールが下部隔壁32′の上面に溜り易
く、剥離スケールのスムーズな排出が困難になり、エア
ースクラビング洗浄の効率の低下が避けられない。
However, conventionally, as shown in FIG. 4, an air introduction hole 9'is provided on the lower side surface of the protective cylinder 4 ', and most of the air introduced into the module is at the top of the hollow fiber membrane bundle 1' ,. The hollow fiber membrane bundle 1 ', ... It is difficult to perform satisfactory cleaning near the center of the. Further, in the hollow fiber membrane module shown in FIG. 4, the amount of scale adhered is large, and therefore the amount of peeled scale at the time of air scrubbing is also large, but conventionally, as shown in FIG. The air inlet hole 9'from the upper surface of the lower partition wall 32 'to the hole 10'.
Since the position of the scale discharge hole 10 'is considerably higher than the upper surface of the lower partition wall 32',
The peeled scale easily accumulates on the upper surface of the lower partition wall 32 ', and it becomes difficult to smoothly discharge the peeled scale, and the efficiency of air scrubbing cleaning is unavoidably lowered.

本考案の目的は、中空糸膜束全体のスケールをよく除
去でき、しかも下部隔壁上面でのスケールの残溜を充分
に排除できる懸垂式中空糸膜モジュールを提供すること
にある。
An object of the present invention is to provide a suspended hollow fiber membrane module which can remove the scale of the entire hollow fiber membrane bundle well and can sufficiently remove the residual scale on the upper surface of the lower partition wall.

〈課題を解決するための手段〉 本考案に係る中空糸膜モジュールは、縦向中空糸膜束
内に縦向連通管を配し、該中空糸膜束の上端並び下端
に、各中空糸膜束の上下端の開口状態並びに連通管の上
下端の開口状態を保持して上部隔壁並びに下部隔壁をそ
れぞれ設け、これら両隔壁にまたがって保護筒を設け、
該保護筒の下端にキャップをキャップ上端において取着
し、該キャップの下面周囲に空気受け部を、同キャップ
の下面から下部隔壁にわたり空気導入管部をそれぞれ設
け、該空気導入管部を下部隔壁を経て保護筒内に連通
し、上記保護筒の下端部にスケール排出孔を設けたこと
を特徴とする構成である。
<Means for Solving the Problems> A hollow fiber membrane module according to the present invention has a vertical communication tube arranged in a vertical hollow fiber membrane bundle, and the hollow fiber membrane bundles have an upper end and a lower end. While maintaining the open state of the upper and lower ends of the bundle and the open state of the upper and lower ends of the communication pipe, an upper partition wall and a lower partition wall are provided respectively, and a protective cylinder is provided across both partition walls.
A cap is attached to the lower end of the protective cylinder at the upper end of the cap, an air receiving portion is provided around the lower surface of the cap, and an air introducing pipe portion is provided from the lower surface of the cap to the lower partition wall. And a scale discharge hole is provided at the lower end of the protective cylinder.

〈実施例の説明〉 以下、図面により本考案の実施例について説明する。<Description of Embodiments> Hereinafter, embodiments of the present invention will be described with reference to the drawings.

第1図は本考案の実施例を示す縦断面図であり、第2
図は第1図におけるII-II断面図である。第1図並びに
第2図において、1,…は縦向の中空糸膜(内径0.1〜0.5
mmφ、外径0.2〜1.0mmφ)、2,…は中空糸膜束内に配し
た連通管であり、中空糸膜より径の大きな中空糸膜また
は送水管を使用できる。31は中空糸膜束の上端に設けた
上部隔壁であり、中空糸膜1,…並びに連通管2,…の上端
は上部隔壁の上面において開口している。32は中空糸膜
束の下端に設けた下部隔壁であり、中空糸膜1,…並びに
連通管2,…の下端は下部隔壁の下面において開口してい
る。上部隔壁31並びに下部隔壁32は、例えば硬化性樹脂
(エポキシ樹脂)の注型により形成することができる。
4は両隔壁31,32にまたがって設けた保護筒であり、上
部には原水供給孔5,…を設けてある。6は保護筒4の上
端にO−リング61を介して螺結した上部金具である。7
は保護筒4の下端にO−リング71を介して配設したキャ
ップであり、全中空糸膜並びに連通管の下端開口を内包
している。8はキャップ7の下面外周に設けた空気受け
部である。9,…はキャップ7の底面から下部隔壁32に向
けて設けた空気導入管部であり、管部9の先端を下部隔
壁32の空気導入孔320にO−リング91を介して水密に差
込んである。下部隔壁32の空気導入孔320の箇数は複数
箇であり分散して設けてある。
FIG. 1 is a vertical sectional view showing an embodiment of the present invention.
The drawing is a sectional view taken along line II-II in FIG. 1 and 2, 1, ... are vertical hollow fiber membranes (inner diameter 0.1 to 0.5).
mmφ, outer diameter 0.2 to 1.0 mmφ), 2, ... Are communication tubes arranged in the hollow fiber membrane bundle, and a hollow fiber membrane or a water pipe having a larger diameter than the hollow fiber membrane can be used. Reference numeral 31 denotes an upper partition provided at the upper end of the bundle of hollow fiber membranes, and the upper ends of the hollow fiber membranes 1, ... And the communication tubes 2, ... Are open at the upper surface of the upper partition. Reference numeral 32 denotes a lower partition wall provided at the lower end of the hollow fiber membrane bundle, and the lower ends of the hollow fiber membranes 1, ... And the communication pipes 2, ... Are open at the lower surface of the lower partition wall. The upper partition wall 31 and the lower partition wall 32 can be formed by, for example, casting a curable resin (epoxy resin).
Reference numeral 4 is a protective cylinder provided over both partition walls 31, 32, and raw water supply holes 5, ... Are provided in the upper part thereof. Reference numeral 6 is an upper metal fitting screwed to the upper end of the protective cylinder 4 via an O-ring 61. 7
Is a cap disposed at the lower end of the protective tube 4 via an O-ring 71, and includes the entire hollow fiber membrane and the lower end opening of the communication pipe. Reference numeral 8 denotes an air receiving portion provided on the outer periphery of the lower surface of the cap 7. Reference numeral 9 denotes an air introducing pipe portion provided from the bottom surface of the cap 7 toward the lower partition wall 32, and the tip of the pipe portion 9 is watertightly inserted into the air introducing hole 320 of the lower partition wall 32 through the O-ring 91. Is. The lower partition wall 32 has a plurality of air introduction holes 320, which are provided in a dispersed manner.

孔断面の円弧状とすれば(この場合、空気導入管部の断
面も円弧状にする)、1箇でもよい。而して、空気導入
孔320の箇数は通常1〜8箇であ.10,は保護筒4に設け
たスケール排出孔であり、下部隔壁の上面に近接して設
けてある。
If the cross section of the hole has an arc shape (in this case, the cross section of the air introduction pipe section also has an arc shape), only one may be provided. Thus, the number of the air introduction holes 320 is usually 1 to 8, and 10 is a scale discharge hole provided in the protective cylinder 4, which is provided close to the upper surface of the lower partition wall.

第1図において、11は仕切板、12は圧力容器、13は原
水入口、14は空気導入ノズルである。上記において、第
3図に示すようにキャップ7に、キャップ7とは別体の
空気受け8を接着または、螺合によって取着してもよ
い。また、空気導入管9,…を下部隔壁32に貫通埋着し、
キャップ7と空気導入管9との間をパッキング72によっ
てシールすることもできる。
In FIG. 1, 11 is a partition plate, 12 is a pressure vessel, 13 is a raw water inlet, and 14 is an air introduction nozzle. In the above, as shown in FIG. 3, an air receiver 8 separate from the cap 7 may be attached to the cap 7 by adhesion or screwing. Further, the air introducing pipes 9, ... Are embedded in the lower partition wall 32 by penetration,
It is also possible to seal between the cap 7 and the air introduction pipe 9 by the packing 72.

〈考案の効果〉 本考案に係る縦型の中空糸膜束モジュールは、上述し
た通りの構成であり、下部隔壁側からエアースクラビン
グ洗浄のためのエアーを導入できるから、中空糸膜束中
央部にも空気を上昇気泡として導入でき、当該中央部に
も原水の対流を惹起でき、中空糸膜束全体をよく洗浄で
きる。また、キャップ上端を保護筒下端に接続してあ
り、キャップの取着にもかかわらず、保護筒に下部隔壁
上面に近接せる位置にてスケール排出孔を設けることが
でき、剥離したスケールを下部隔壁の上面に残留させる
ことなくスムーズに排出できる。
<Effects of the Invention> The vertical hollow fiber membrane bundle module according to the present invention is configured as described above, and since air for air scrubbing cleaning can be introduced from the lower partition wall side, Can introduce air as rising bubbles, can also induce convection of raw water in the central portion, and can clean the entire hollow fiber membrane bundle well. In addition, since the upper end of the cap is connected to the lower end of the protective cylinder, despite the mounting of the cap, the protective cylinder can be provided with a scale discharge hole at a position close to the upper surface of the lower partition wall. It can be discharged smoothly without being left on the upper surface of.

従って、中空糸膜モジュールが中空糸膜内の透過水を
上下の両方に向けて流動させる方式であって、その中空
糸膜内での透過水流動抵抗が低いために透過流束を高く
でき、それに伴い膜に付着するスケールの量が多いにも
かかわらず、スケールを確実に洗浄除去して透過流束を
容易にほぼ初期流束に回復できる。
Therefore, the hollow fiber membrane module is a system in which the permeated water in the hollow fiber membrane is caused to flow toward both the upper and lower sides, and the permeated flux can be increased because the permeated water flow resistance in the hollow fiber membrane is low, Accordingly, although the amount of scale attached to the membrane is large, the scale can be reliably washed and removed, and the permeation flux can be easily restored to the initial flux.

【図面の簡単な説明】[Brief description of drawings]

第1図は本考案の一実施例を示す説明図、第2図は第1
図におけるII-II断面図、第3図は本考案の別実施例の
要部を示す説明図、第4図は従来例を示す説明図であ
る。 1……中空糸膜、2……連通管、31……上部隔壁、32…
…下部隔壁、4……保護筒、7……キャップ、8……空
気受け部、9……空気導入管部。
FIG. 1 is an explanatory view showing an embodiment of the present invention, and FIG.
FIG. 3 is a sectional view taken along line II-II in FIG. 3, FIG. 3 is an explanatory view showing a main part of another embodiment of the present invention, and FIG. 4 is an explanatory view showing a conventional example. 1 ... Hollow fiber membrane, 2 ... Communication tube, 31 ... Upper partition wall, 32 ...
... Lower partition wall, 4 ... Protective cylinder, 7 ... Cap, 8 ... Air receiving part, 9 ... Air introducing pipe part.

Claims (1)

(57)【実用新案登録請求の範囲】(57) [Scope of utility model registration request] 【請求項1】縦向中空糸膜(1)の束内に縦向連通管
(2)を配し、該中空糸膜束の上端並びに下端に、各中
空糸膜束の上下端の開口状態並びに連通管の上下端の開
口状態を保持して上部隔壁(31)並びに下部隔壁(32)
をそれぞれ設け、これら両隔壁にまたがって保護筒
(4)を設け、該保護筒(4)の下端にキャップ(7)
をキャップ上端において取着し、該キャップ(7)の下
面周囲に空気受け部(8)を、同キャップ(7)の下面
から下部隔壁(32)にわたり空気導入管部(9)をそれ
ぞれ設け、該空気導入管部(9)を下部隔壁(32)を経
て保護筒(4)内に連通し、上記保護筒(4)の下端部
にスケール排出孔(10)を設けたことを特徴とする中空
糸膜モジュール。
1. A vertical communication pipe (2) is arranged in a bundle of vertical hollow fiber membranes (1), and the upper and lower ends of the hollow fiber membrane bundles are open at the upper and lower ends of each hollow fiber membrane bundle. In addition, the upper partition wall (31) and the lower partition wall (32) are maintained by maintaining the open state of the upper and lower ends of the communication pipe.
And a protective cylinder (4) provided over both of these partition walls, and a cap (7) is provided at the lower end of the protective cylinder (4).
Is attached to the upper end of the cap, an air receiving portion (8) is provided around the lower surface of the cap (7), and an air introducing pipe portion (9) is provided from the lower surface of the cap (7) to the lower partition wall (32). The air introduction pipe portion (9) is communicated with the inside of the protection cylinder (4) through the lower partition wall (32), and the scale discharge hole (10) is provided at the lower end of the protection cylinder (4). Hollow fiber membrane module.
JP1990025776U 1990-03-14 1990-03-14 Hollow fiber membrane module Expired - Lifetime JP2509204Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1990025776U JP2509204Y2 (en) 1990-03-14 1990-03-14 Hollow fiber membrane module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1990025776U JP2509204Y2 (en) 1990-03-14 1990-03-14 Hollow fiber membrane module

Publications (2)

Publication Number Publication Date
JPH03119424U JPH03119424U (en) 1991-12-10
JP2509204Y2 true JP2509204Y2 (en) 1996-08-28

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JP (1) JP2509204Y2 (en)

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