JPH0698273B2 - Spiral type membrane module - Google Patents
Spiral type membrane moduleInfo
- Publication number
- JPH0698273B2 JPH0698273B2 JP62205811A JP20581187A JPH0698273B2 JP H0698273 B2 JPH0698273 B2 JP H0698273B2 JP 62205811 A JP62205811 A JP 62205811A JP 20581187 A JP20581187 A JP 20581187A JP H0698273 B2 JPH0698273 B2 JP H0698273B2
- Authority
- JP
- Japan
- Prior art keywords
- spacer
- membrane module
- raw water
- type membrane
- view
- 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
Links
- 239000012528 membrane Substances 0.000 title claims description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 47
- 125000006850 spacer group Chemical group 0.000 claims description 44
- 238000000926 separation method Methods 0.000 claims description 16
- 239000000725 suspension Substances 0.000 description 5
- 239000012466 permeate Substances 0.000 description 4
- 230000010287 polarization Effects 0.000 description 4
- -1 polypropylene Polymers 0.000 description 2
- 238000001223 reverse osmosis Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000007666 vacuum forming Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/10—Spiral-wound membrane modules
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は逆浸透膜分離装置や限外濾過装置或いは精密濾
過装置等の膜分離装置に用いられるスパイラル型膜モジ
ュールに関するものであり、特に原水中に含まれる懸濁
物により膜間の流路を閉塞させることなく、かつ流路の
原水流れを攪乱させて透過水の透過速度を高めることを
可能としたスパイラル型膜モジュールに関するものであ
る。TECHNICAL FIELD The present invention relates to a spiral wound type membrane module used in a membrane separation device such as a reverse osmosis membrane separation device, an ultrafiltration device, or a microfiltration device, and in particular, the original The present invention relates to a spiral wound type membrane module capable of increasing the permeation rate of permeated water by disturbing the flow of raw water in the flow channel without blocking the flow channel between the membranes by the suspension contained in water.
［従来の技術］ 逆浸透膜分離装置等の膜分離装置に用いられる膜モジュ
ールとして、集水管の外周に分離膜を巻回したスパイラ
ル型膜モジュールがある。このスパイラル型膜モジュー
ルにおいては、膜間に原水が通る流路を形成するために
スペーサを介在させているが、従来このスペーサとして
はネット状のスペーサが用いられてきた。[Prior Art] As a membrane module used in a membrane separator such as a reverse osmosis membrane separator, there is a spiral wound membrane module in which a separation membrane is wound around the outer circumference of a water collection pipe. In this spiral type membrane module, a spacer is interposed between the membranes to form a flow path through which raw water passes, but conventionally, a net-shaped spacer has been used as this spacer.
また、従来、波板形のスペーサ（いわゆるコルゲートス
ペーサ）も考えられている。Further, conventionally, a corrugated spacer (so-called corrugated spacer) has been considered.
［発明が解決しようとする問題点］ ネット状のスペーサを用いたスパイラル型膜モジュール
においては、懸濁物を含む原水を通水したときにネット
状のスペーサが懸濁物で閉塞するという問題がある。そ
こで、ネット状スペーサを用いる場合には、懸濁物を予
め取り除いた後に膜モジュールに通水する必要があり、
煩雑な前処理が必要であった。[Problems to be Solved by the Invention] In a spiral wound type membrane module using a net-shaped spacer, there is a problem that the net-shaped spacer is clogged with the suspension when raw water containing the suspension is passed. is there. Therefore, when using a net-shaped spacer, it is necessary to pass the water through the membrane module after removing the suspension in advance,
A complicated pretreatment was necessary.
コルゲートスペーサを用いた膜モジュールにおいては、
かかる原水流路の閉塞は生じにくいのであるが、モジュ
ールの原水入口から原水出口まで直線状の流路が貫通し
ており、膜間を流れる原水の流れに攪乱を与える要因が
少ない。そのため、流れが層流となり易く、膜面に沿っ
て濃度分極が生じ、透過水量が低下し易いという問題が
あった。In the membrane module using the corrugated spacer,
Although the raw water flow passage is unlikely to be blocked, a linear flow passage extends from the raw water inlet of the module to the raw water outlet, and there are few factors that disturb the flow of raw water between the membranes. Therefore, there is a problem that the flow tends to be a laminar flow, concentration polarization occurs along the membrane surface, and the amount of permeated water tends to decrease.
また、そのため波板形スペーサを用いたスパイラル型膜
モジュールにおいては、ネット状のスペーサを介在させ
たものよりも高速で原水を流さなければ所定の透過水量
を得ることができず、動力コストが嵩むという問題もあ
った。Therefore, in the spiral wound type membrane module using the corrugated plate-shaped spacer, a predetermined amount of permeated water cannot be obtained unless the raw water is made to flow at a higher speed than that in which a net-shaped spacer is interposed, which increases the power cost. There was also a problem.
［問題点を解決するための手段］ 本発明のスパイラル型膜モジュールは、集水管の外周に
波板形のスペーサを介して分離膜を巻回したスパイラル
型膜モジュールにおいて、該波板形のスペーサに沿う原
水流路は原水の入口から出口まで貫通して設けられてお
り、該スペーサの波条の斜面に突起部が設けられている
ことを特徴とする。[Means for Solving the Problems] The spiral wound type membrane module of the present invention is a spiral wound type membrane module in which a separation membrane is wound around the outer circumference of a water collecting pipe via a corrugated plate shaped spacer. The raw water flow path along the line is provided so as to penetrate from the inlet to the outlet of the raw water, and a protrusion is provided on the slope of the corrugation of the spacer.
［作用］ かかる本発明のスパイラル型膜モジュールにおいては、
波条の斜面に突起が設けられているから膜面に沿う流れ
が攪乱される。これにより濃度分極が解消されるように
なって透過水量が増大される。しかも、原水流路は原水
の入口から出口まで貫通して設けられているため、懸濁
物質も引掛かりにくく、原水流路の閉塞も防止される。[Operation] In such a spiral wound type membrane module of the present invention,
Since the projections are provided on the slope of the corrugation, the flow along the film surface is disturbed. As a result, concentration polarization is eliminated and the amount of permeated water is increased. In addition, since the raw water flow passage is provided so as to penetrate from the raw water inlet to the raw water, suspended matter is less likely to be caught, and the raw water flow passage is prevented from being blocked.
［実施例］ 以下図面に示す実施例を参照して本発明について更に詳
細に説明する。[Examples] The present invention will be described in more detail below with reference to the examples shown in the drawings.
第１図は本発明の実施例に係るスパイラル型膜モジュー
ルの集水管管軸方向と垂直方向の断面図、第２、３図は
組立構造を示す断面図と斜視図である。また、第４、５
図はスペーサを示す断面図と斜面図である。FIG. 1 is a cross-sectional view of a spiral wound type membrane module according to an embodiment of the present invention in a direction perpendicular to an axial direction of a water collecting pipe, and FIGS. 2 and 3 are a cross-sectional view and a perspective view showing an assembled structure. Also, the fourth and fifth
The figure is a cross-sectional view and a perspective view showing the spacer.
符号１は集水管であり、その外周に波板形のスペーサ２
を介して分離膜３が巻回されている。第２図に拡大して
示す如く、集水管１は管内外を連通する開口1aが穿設さ
れている。分離膜３は本実施例では袋状のものであり、
その中央部3aが集水管１をくるんでおり、非中央部3b、
3cが重ね合わされた状態にて集水管１の周囲に巻回され
る。Reference numeral 1 is a water collecting pipe, and a corrugated plate-shaped spacer 2 is provided around the water collecting pipe.
The separation membrane 3 is wound via the. As shown in the enlarged view of FIG. 2, the water collection pipe 1 is provided with an opening 1a that communicates the inside and outside of the pipe. The separation membrane 3 has a bag shape in this embodiment,
The central portion 3a surrounds the water collecting pipe 1, and the non-central portion 3b,
It is wound around the water collection pipe 1 in a state in which 3c are overlapped.
また、袋状分離膜３の内部にはメッシュスペーサ４が挿
入されている。この袋状分離膜３の内部から透過水通路
５となる。スペーサ２は波板形であり、第４、５図に示
す如く波条の一方の斜面W1には突起2aが形成されてい
る。なお、本実施例では、他方の斜面W2は平面となって
おり、突起は形成されていない。この突起2aは平面視形
状が三角形のものであり、該斜面W1の上半分では、スペ
ーサ表面に突出し、下半分においてはスペーサ裏面に突
出している。A mesh spacer 4 is inserted inside the bag-shaped separation membrane 3. The permeate passage 5 is formed from the inside of the bag-shaped separation membrane 3. The spacer 2 has a corrugated plate shape, and a projection 2a is formed on one slope W 1 of the corrugation as shown in FIGS. In this embodiment, the other slope W 2 is a flat surface and no protrusion is formed. The projections 2a are those in plan view the shape of a triangle, with the upper half of the oblique surface W 1, protrudes spacer surface, in the lower half protrudes spacer backside.
このように構成されたスパイラル型膜モジュールにおい
て、原水は分離膜３同志の間を、スペーサ２の両面に沿
って膜面方向に通過され、その間に分離膜３を透過して
透過水通路５内に流入する。この通路５内に流入した透
過水は、集水管１に向って該通路５内を流れ、次いで開
口1aを通って集水管１内に入り透過水として膜モジュー
ルから取り出される。In the spiral-type membrane module configured as described above, raw water is passed between the separation membranes 3 along the both surfaces of the spacer 2 in the membrane surface direction, and while passing through the separation membrane 3, the inside of the permeate passage 5 is passed. Flow into. The permeated water that has flowed into the passage 5 flows through the passage 5 toward the water collection pipe 1, then enters the water collection pipe 1 through the opening 1a and is taken out as permeated water from the membrane module.
しかして、分離膜３の波条の斜面W1に突起2aが形成され
ているところから、分離膜３の表面に沿う流れが攪乱さ
れる。これにより、原水通路内における濃度分極が解消
されることになり、高い透過水量が得られる。勿論、ネ
ット状スペーサと異なり、原水に含まれる懸濁物質が引
掛かりにくく、それによる原水通路の閉塞も防止され
る。Thus, from where the projection 2a on the slopes W 1 of the wave strip of the separation membrane 3 is formed, the flow along the surface of the separation membrane 3 is disturbed. As a result, concentration polarization in the raw water passage is eliminated, and a high amount of permeate can be obtained. Of course, unlike the net-shaped spacer, suspended substances contained in the raw water are less likely to be caught, and the clogging of the raw water passage due to this is also prevented.
また、突起2aを設けたことによりスペーサの断面係数が
増大してスペーサの圧縮強度が高まり、スペーサを分離
膜と共に集水管の周囲に巻き上げるに際してスペーサが
押し潰される事態が防止される。In addition, the provision of the protrusion 2a increases the cross-sectional modulus of the spacer and enhances the compressive strength of the spacer, and prevents the spacer from being crushed when it is wound around the water collecting pipe together with the separation membrane.
上記実施例ではスペーサ２の波条の一方の斜面W1にのみ
突起2aが設けられていたが、本発明では第６図及び第７
図に示す如く双方の斜面W1、W2に突起2aを形成したスペ
ーサ2Aを採用しても良い。In the above embodiment, the protrusion 2a is provided only on one slope W1 of the corrugation of the spacer 2, but in the present invention, it is shown in FIGS.
As shown in the figure, a spacer 2A having protrusions 2a formed on both slopes W 1 and W 2 may be used.
また、本発明では第８図（要部斜視図）、第９図（平面
図）、第10、11図（断面図）に示すスペーサ2Bを採用し
ても良い。このスペーサ2Bは波条の斜面に台形状の突起
2bが設けられているものである。このスペーサ2Bにおい
ては、波条の稜の頂面は幅の狭い部分2cと幅の広い部分
2dとが交互に配置され、隣接する波条（平面視では山頂
にある波条V1と谷底にある波状V2）同志では、幅の狭い
部分2cと幅の広い部分2dとが隣接し、原水流路が繰り返
し、幅が広くなったり幅が狭くなったりしている。Further, in the present invention, the spacer 2B shown in FIG. 8 (perspective view of main part), FIG. 9 (plan view), and FIGS. 10 and 11 (cross-sectional view) may be adopted. This spacer 2B has a trapezoidal protrusion on the slope of the corrugation.
2b is provided. In this spacer 2B, the top surface of the ridge of the corrugation has a narrow portion 2c and a wide portion.
2d and 2d are alternately arranged, and adjacent ripples (ripple V 1 on the mountain peak and wavy V 2 on the valley bottom in a plan view) are adjacent to each other, and a narrow portion 2c and a wide portion 2d are adjacent to each other, The raw water flow path is repeating and widening or narrowing.
第６〜11図のスペーサ2A、2Bにおいても、前記スペーサ
２と同様に原水流れが攪乱され、高い透過水量が得られ
ると共に、懸濁物の引掛かりもない。また、断面係数が
大きく、圧縮強度も大きい。In the spacers 2A and 2B shown in FIGS. 6 to 11, the raw water flow is disturbed similarly to the spacer 2 to obtain a high amount of permeated water, and the suspension is not caught. Moreover, the section modulus is large and the compressive strength is also large.
本発明において、一つの波条に設ける突起2a又は2b同志
の間隔は５〜30mm程度が好適である。In the present invention, the interval between the protrusions 2a or 2b provided on one corrugation is preferably about 5 to 30 mm.
本発明で採用されるスペーサは厚さが例えば0.05〜0.5m
m程度のポリ塩化ビニル、酢酸セルロース、ポリプロピ
レン、ポリエチレン等の合成樹脂シートを真空成形する
ことにより容易に製造することができる。なお、図面に
示したスペーサはいずれも上面側と下面側とが面対称と
なっており、真空成形し易い。The spacer employed in the present invention has a thickness of, for example, 0.05 to 0.5 m.
It can be easily manufactured by vacuum forming a synthetic resin sheet of about m polyvinyl chloride, cellulose acetate, polypropylene, polyethylene or the like. In each of the spacers shown in the drawings, the upper surface side and the lower surface side are plane-symmetric, which facilitates vacuum forming.
［発明の効果］ 以上の通り、本発明のスパイラル型膜モジュールは波板
形スペーサを用いており、懸濁物質を含む原水に対して
も原水流路閉塞が防止される。しかも、本発明ではスペ
ーサの波条の斜面に突起が設けられており、原水流路内
における流れが攪乱され、分離膜膜面に沿う濃度分極が
著しく減少される。従って、原水流速を増大させること
なく高い透過水量を得ることができる。さらに、スペー
サの圧縮強度が大きいので、モジュール組立時にスペー
サが押し潰されることがない。[Advantages of the Invention] As described above, the spiral wound type membrane module of the present invention uses the corrugated plate-shaped spacer, and the raw water flow passage is prevented from being blocked even in the raw water containing the suspended substance. Moreover, in the present invention, the protrusions are provided on the slopes of the ripples of the spacers, the flow in the raw water channel is disturbed, and the concentration polarization along the separation membrane surface is significantly reduced. Therefore, a high amount of permeate can be obtained without increasing the flow velocity of raw water. Further, since the spacer has a high compressive strength, the spacer will not be crushed when the module is assembled.
第１図は本発明の実施例に係るスパイラル型膜モジュー
ルの断面図、第２図は組立説明断面図、第３図は同斜視
図、第４図はスペーサ２の斜視図、第５図は第４図のＶ
−Ｖ線断面図である。第６図はスペーサ2Aの斜視図、第
７図は第６図のVII−VII線断面図である。第８図はスペ
ーサ2Bの要部斜視図、第９図は同平面図、第10図及び第
11図はそれぞれ第９図のＸ−Ｘ線及びXI−XI線断面図で
ある。 １……集水管、 ２、2A、2B……スペーサ、 2a、2b……突起、３……分離膜。1 is a sectional view of a spiral wound type membrane module according to an embodiment of the present invention, FIG. 2 is a sectional view for explaining assembly, FIG. 3 is the same perspective view, FIG. 4 is a perspective view of a spacer 2, and FIG. V in Fig. 4
It is a -V line sectional view. FIG. 6 is a perspective view of the spacer 2A, and FIG. 7 is a sectional view taken along line VII-VII of FIG. FIG. 8 is a perspective view of a main part of the spacer 2B, FIG. 9 is a plan view of the same, FIG.
11 is a sectional view taken along the line XX and XI-XI of FIG. 9, respectively. 1 ... Water collection pipe, 2, 2A, 2B ... Spacer, 2a, 2b ... Protrusion, 3 ... Separation membrane.
Claims (1)
分離膜を巻回したスパイラル型膜モジュールにおいて、
該波板形スペーサに沿う原水流路は原水の入口から出口
まで貫通して設けられており、該スペーサの波条の斜面
に突起部が設けられていることを特徴とするスパイラル
型膜モジュール。1. A spiral wound type membrane module in which a separation membrane is wound around the outer circumference of a water collection tube via a corrugated plate-shaped spacer,
A spiral wound type membrane module, characterized in that a raw water flow path along the corrugated plate-shaped spacer is provided so as to penetrate from the raw water inlet to the outlet, and a projection is provided on the slope of the corrugation of the spacer.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62205811A JPH0698273B2 (en) | 1987-08-19 | 1987-08-19 | Spiral type membrane module |
| US07/231,731 US4834881A (en) | 1987-08-19 | 1988-08-12 | Spiral wound type membrane module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62205811A JPH0698273B2 (en) | 1987-08-19 | 1987-08-19 | Spiral type membrane module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6451105A JPS6451105A (en) | 1989-02-27 |
| JPH0698273B2 true JPH0698273B2 (en) | 1994-12-07 |
Family
ID=16513088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62205811A Expired - Lifetime JPH0698273B2 (en) | 1987-08-19 | 1987-08-19 | Spiral type membrane module |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0698273B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6190557B1 (en) | 1996-12-09 | 2001-02-20 | Nitto Denko Corporation | Spiral wound type membrane element, running method and washing method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5281079A (en) * | 1975-12-29 | 1977-07-07 | Ebara Infilco Co Ltd | Permeable membrance module |
| JPS5323875A (en) * | 1976-08-18 | 1978-03-04 | Matsushita Electric Ind Co Ltd | Spiral module for liquid separation |
-
1987
- 1987-08-19 JP JP62205811A patent/JPH0698273B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6451105A (en) | 1989-02-27 |
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