JP2002001070A - Apparatus for electrodialysis - Google Patents
Apparatus for electrodialysisInfo
- Publication number
- JP2002001070A JP2002001070A JP2000182064A JP2000182064A JP2002001070A JP 2002001070 A JP2002001070 A JP 2002001070A JP 2000182064 A JP2000182064 A JP 2000182064A JP 2000182064 A JP2000182064 A JP 2000182064A JP 2002001070 A JP2002001070 A JP 2002001070A
- Authority
- JP
- Japan
- Prior art keywords
- chamber
- chamber frame
- exchange membrane
- hardness
- frame
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Treatment Of Water By Ion Exchange (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電気透析装置に関
する。[0001] The present invention relates to an electrodialysis apparatus.
【０００２】[0002]
【従来の技術】従来、超純水製造用装置として、陰イオ
ン交換膜と陽イオン交換膜とを交互に配置した電気透析
装置において、脱塩室にイオン交換体を充填し、この脱
塩室に被処理水を流しながら電圧を印加して電気透析を
行うことにより、高純度の脱イオン水を製造する装置
（以下、脱イオン水製造装置）が知られている。2. Description of the Related Art Conventionally, as an apparatus for producing ultrapure water, in an electrodialysis apparatus in which anion exchange membranes and cation exchange membranes are alternately arranged, an ion exchanger is filled in a desalination chamber, and the desalination chamber is filled with the ion exchanger. There is known an apparatus for producing high-purity deionized water by applying a voltage while flowing water to be treated to perform high-purity deionized water (hereinafter, deionized water production apparatus).
【０００３】従来の脱イオン水製造装置は、ポリプロピ
レン等の材質にて製作された脱塩室を形成する室枠と濃
縮室を形成する室枠との間に、陽イオン交換膜又は陰イ
オン交換膜（以下、イオン交換膜とする）を装着するに
あたり、室枠とイオン交換膜との密着性を高めるため
に、室枠とイオン交換膜との間に通常エチレン−プロピ
レン−ジエン共重合体（以下、ＥＰＤＭと称する）等の
材質のシートパッキンが装着される。そして、これらを
交互に繰り返し配置し、両端に配置される極室とともに
フィルタープレス状の締め付け型とし、ボルトナットを
用いて所定圧力（締め付け部圧力として０．５〜３ＭＰ
ａ）になるよう締め付けて構成されている。この場合、
室枠とイオン交換膜との密着性は、通常、シートパッキ
ンの持つ変形応力により保持される。[0003] A conventional deionized water producing apparatus comprises a cation exchange membrane or an anion exchange membrane between a chamber frame forming a desalting chamber and a chamber frame forming a concentrating chamber made of a material such as polypropylene. When a membrane (hereinafter, referred to as an ion exchange membrane) is mounted, an ethylene-propylene-diene copolymer (normally, an ethylene-propylene-diene copolymer) is usually provided between the chamber frame and the ion exchange membrane in order to increase the adhesion between the chamber frame and the ion exchange membrane. A sheet packing made of a material such as EPDM is attached. These are alternately and repeatedly arranged to form a filter press-type clamping die together with the pole chambers disposed at both ends, and a predetermined pressure (0.5 to 3 MPa as a clamping portion pressure) is applied using a bolt and nut.
a). in this case,
The adhesion between the chamber frame and the ion exchange membrane is usually maintained by the deformation stress of the sheet packing.
【０００４】この形式の脱イオン水製造装置は、運転が
開始され温度が上昇するとともに、各室枠及び室枠間の
シートパッキンが熱的影響を受け、室枠間の締め付け圧
力（以下、シール圧力という）が低下し、室枠とイオン
交換膜とのシール性が悪化して、外部への液リーク又は
内部ダクト間での液リークを生じ、脱イオン水の品質を
低下させる。したがって、液リークを生じた場合、運転
を停止し再度締め付けざるを得ない。再締め付けにより
液リークが解消できない場合は、寿命がきたものと判断
し、室枠、シートパッキン等を取替える作業を行う必要
がある。In this type of deionized water production apparatus, when the operation is started and the temperature rises, the sheet packing between the chamber frames and the chamber frames is thermally affected, and the tightening pressure between the chamber frames (hereinafter referred to as a seal) is obtained. Pressure), the sealing property between the chamber frame and the ion exchange membrane is deteriorated, and a liquid leak to the outside or a liquid leak between the internal ducts occurs, thereby deteriorating the quality of deionized water. Therefore, when a liquid leak occurs, the operation must be stopped and tightened again. If the liquid leak cannot be eliminated by retightening, it is determined that the life has expired, and it is necessary to replace the chamber frame, sheet packing, and the like.
【０００５】液リーク量は、シール圧力と関係し、シー
ル圧力が高いほど液リーク量は低減される。初期は、液
リークの生じないような圧力で締め付けておいても、運
転時間の経過とともにシートパッキン材質の持つクリー
プ特性によりシートパッキンが変形し、シール圧力は徐
々に低下する。特に、高温度下（５０℃以上）において
は、クリープ特性がさらに大きくなりシール圧力が著し
く低下するとともに、材質の熱変形も加わり、シール性
が悪化し、液リークを生ずる。[0005] The amount of liquid leakage is related to the sealing pressure, and the higher the sealing pressure, the lower the amount of liquid leakage. Initially, even if the sheet packing is tightened at a pressure that does not cause liquid leakage, the sheet packing is deformed due to the creep characteristic of the sheet packing material with the elapse of operation time, and the sealing pressure gradually decreases. In particular, at a high temperature (50 ° C. or higher), the creep characteristics are further increased, the sealing pressure is remarkably reduced, and thermal deformation of the material is applied, so that the sealing property is deteriorated and liquid leakage occurs.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、前記した問
題を解決するべくなされたものであり、高温度下でのシ
ール圧力低下を抑制し、長期的に安定した脱イオン水製
造装置等に使用できる電気透析装置を提供することを目
的とする。SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is intended to provide a deionized water production apparatus which suppresses a decrease in sealing pressure at a high temperature and is stable for a long time. An object of the present invention is to provide a usable electrodialysis device.
【０００７】[0007]
【課題を解決するための手段】本発明は、陽極と陰極と
の間に、複数の陽イオン交換膜と複数の陰イオン交換膜
とを交互に配列し、開口部を有する板状の部材からなる
室枠が陽イオン交換膜及び陰イオン交換膜の間に配置さ
れ、室枠の開口部の内側にあり陽極側が陰イオン交換膜
で区画され陰極側が陽イオン交換膜で区画された脱塩室
と、室枠の開口部の内側にあり陽極側が陽イオン交換膜
で区画され陰極側が陰イオン交換膜で区画された濃縮室
とを交互に形成して構成される電気式脱塩装置であっ
て、脱塩室を形成する室枠又は濃縮室を形成する室枠の
一方がＪＩＳ Ｋ６３０１による硬さが９９以上の材質
よりなる高硬度室枠であり、他方がＪＩＳ Ｋ６３０１
による硬さが８０〜９６の材質よりなる低硬度室枠であ
ることを特徴とする電気透析装置を提供する。According to the present invention, a plurality of cation exchange membranes and a plurality of anion exchange membranes are alternately arranged between an anode and a cathode, and a plate-like member having an opening is provided. A desalination chamber is disposed between the cation exchange membrane and the anion exchange membrane, inside the opening of the chamber frame, the anode side is defined by the anion exchange membrane, and the cathode side is defined by the cation exchange membrane. And an enrichment chamber formed inside the opening of the chamber frame and formed alternately with a concentration chamber partitioned on the anode side by a cation exchange membrane and the cathode side partitioned by an anion exchange membrane, One of the chamber frame forming the desalting chamber or the chamber frame forming the concentrating chamber is a high hardness chamber frame made of a material having a hardness of 99 or more according to JIS K6301, and the other is JIS K6301.
The present invention provides an electrodialysis apparatus characterized by being a low-hardness chamber frame made of a material having a hardness of 80 to 96 according to the above.
【０００８】[0008]
【発明の実施の形態】本発明は、脱イオン水製造用、特
に超純水製造用の電気透析装置として好適であるが、脱
イオン水製造用に限らず、梅酢液等各種の脱塩を必要と
する液の脱塩を目的とした電気透析装置としても有効で
ある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is suitable as an electrodialysis apparatus for producing deionized water, particularly for producing ultrapure water. It is also effective as an electrodialysis device for the purpose of desalting required liquid.
【０００９】本発明で使用する室枠は、開口部を有する
板状の部材である。例えば、長方形の開口部を有する長
方形の板状部材である。この部材の一方の面に陽イオン
交換膜、他方の面に陰イオン交換膜を積層することによ
り開口部には脱塩室又は濃縮室が形成される。The chamber frame used in the present invention is a plate-like member having an opening. For example, it is a rectangular plate-like member having a rectangular opening. By laminating a cation exchange membrane on one side of this member and an anion exchange membrane on the other side, a desalting chamber or a concentration chamber is formed at the opening.
【００１０】本発明の電気透析装置においては、脱塩室
を形成する室枠及び濃縮室を形成する室枠が、一方はＪ
ＩＳ Ｋ６３０１による硬さが９９以上の材質よりなる
高硬度室枠であり、他方がＪＩＳ Ｋ６３０１による硬
さ８０〜９６の材質よりなる低硬度室枠である。ここ
で、ＪＩＳ Ｋ６３０１による硬さの測定は、スプリン
グ式硬さ試験のＡ形により行う。試験片は、厚さ１２ｍ
ｍ以上のものを用いる。以下、ＪＩＳ Ｋ６３０１によ
る硬さを単に硬さという。[0010] In the electrodialysis apparatus of the present invention, the chamber frame forming the desalting chamber and the chamber frame forming the concentrating chamber, one of which is J
This is a high hardness chamber frame made of a material having a hardness of 99 or more according to IS K6301, and the other is a low hardness chamber frame made of a material having a hardness of 80 to 96 according to JIS K6301. Here, the measurement of the hardness according to JIS K6301 is performed by a spring type hardness test A type. The test piece is 12m thick
m or more are used. Hereinafter, hardness according to JIS K6301 is simply referred to as hardness.
【００１１】本発明で用いる高硬度室枠としては、ポリ
プロピレン、ポリフェニレンスルフィド、ポリエーテル
エーテルケトン、ポリフッ化ビニリデン等の材質を使用
できる。特に、ポリプロピレンは加工性、経済性等の面
から好ましい。本発明で用いる低硬度室枠としては、オ
レフィン系エラストマー、ポリウレタン、ポリエステル
等の材質を使用できる。As the high hardness chamber frame used in the present invention, materials such as polypropylene, polyphenylene sulfide, polyether ether ketone, and polyvinylidene fluoride can be used. In particular, polypropylene is preferable from the viewpoint of processability, economy, and the like. As the low hardness chamber frame used in the present invention, a material such as an olefin-based elastomer, polyurethane, or polyester can be used.
【００１２】本発明で用いる高硬度室枠又は低硬度室枠
は、軟化温度が１２０℃以上、かつ、ＪＩＳ Ｋ６３０
１による圧縮永久ひずみが６０％以下であることが好ま
しい。ＪＩＳ Ｋ６３０１による圧縮永久ひずみは、ク
リープ特性の評価法の一種であり、厚さ１２．７０±
０．１３ｍｍ、直径２９．０ｍｍの直円柱形の試験片を
用いて測定する。以下、ＪＩＳ Ｋ６３０１による圧縮
永久ひずみを、単に圧縮永久ひずみという。The high hardness chamber frame or low hardness chamber frame used in the present invention has a softening temperature of 120 ° C. or more and JIS K630.
It is preferable that the compression set by No. 1 is 60% or less. The compression set according to JIS K6301 is a kind of evaluation method of creep characteristics and has a thickness of 12.70 ±
The measurement is performed using a right cylindrical test piece having a diameter of 0.13 mm and a diameter of 29.0 mm. Hereinafter, the compression set according to JIS K6301 is simply referred to as compression set.
【００１３】低硬度室枠は、それ自体がシートパッキン
の働きをなすものでありその締め付け変形後に厚さが、
１〜１０ｍｍであることが好ましく、特に２〜４ｍｍで
あることが好ましい。高硬度室枠の厚さについては、加
工性、強度等の面から１〜２０ｍｍであることが好まし
く、特に２〜１０ｍｍであることが好ましい。[0013] The low-hardness chamber frame itself functions as a sheet packing, and after the tightening deformation, the thickness thereof becomes
It is preferably from 1 to 10 mm, particularly preferably from 2 to 4 mm. The thickness of the high hardness chamber frame is preferably from 1 to 20 mm, particularly preferably from 2 to 10 mm, in view of workability, strength and the like.
【００１４】低硬度室枠は、室枠のイオン交換膜に接す
る面において、室枠の開口部側の辺縁近傍に一つ以上の
線状リブを有し、室枠の外周部側の辺縁近傍に一つ以上
の線状リブを有することが好ましい。特に、室枠の開口
部及び外周部の辺縁近傍にそれぞれ複数列の線状リブを
配置することが好ましい。The low-hardness chamber frame has one or more linear ribs near the opening edge of the chamber frame on the surface of the chamber frame in contact with the ion exchange membrane. It is preferable to have one or more linear ribs near the edge. In particular, it is preferable to arrange a plurality of rows of linear ribs near the edges of the opening and the outer periphery of the chamber frame.
【００１５】低硬度室枠の線状リブの取付け位置は、室
枠のイオン交換膜に接する面の少なくとも一方であるこ
とが好ましく、特に両側であることが好ましい。ここ
で、線状リブとは、室枠とイオン交換膜の隙間から内部
及び外部への液リークを防止するために室枠のイオン交
換膜との接触面上に設けられた線状の突起部又は複数の
線状の突起部を格子状に配量して形成した突起部のこと
をいう。The linear ribs of the low hardness chamber frame are preferably mounted on at least one of the surfaces of the chamber frame that are in contact with the ion exchange membrane, and particularly preferably on both sides. Here, the linear rib is a linear projection provided on a contact surface of the chamber frame with the ion exchange membrane in order to prevent a liquid leak from inside and outside through a gap between the chamber frame and the ion exchange membrane. Alternatively, it refers to a protrusion formed by distributing a plurality of linear protrusions in a lattice shape.
【００１６】低硬度室枠の外周部側の辺縁近傍の線状リ
ブ高さが、室枠の開口部側の辺縁近傍の線状リブ高さよ
り大きく、この面に接するイオン交換膜の外周縁が該外
周部側の辺縁近傍の線状リブの内側になるよう配置す
る。線状リブの突起している部分の断面形状としては、
半円形、半楕円形、三角形、台形等の四角形、又は、こ
れらの組合せであればよい。The height of the linear ribs near the outer peripheral edge of the low hardness chamber frame is larger than the height of the linear ribs near the edge near the opening side of the chamber frame. The peripheral edge is located inside the linear rib near the peripheral edge on the outer peripheral side. As the cross-sectional shape of the protruding part of the linear rib,
It may be a quadrangle such as a semicircle, a semiellipse, a triangle, a trapezoid, or a combination thereof.
【００１７】低硬度室枠の外周部側の辺縁近傍に配置す
る線状リブの高さは、イオン交換膜の厚さの１５０〜５
００％であることが好ましく、特に２００〜３００％で
あることが好ましい。低硬度室枠の開口部側の辺縁近傍
に配置する線状リブの高さはイオン交換膜の厚さの２０
〜１００％であることが好ましく、特に、４０〜８０％
であることが好ましい。これらの線状リブの幅は、線状
リブの高さの５０〜５００％であることが好ましく、特
に、１００〜３００％であることが好ましい。The height of the linear ribs disposed near the outer peripheral edge of the low hardness chamber frame is 150 to 5 times the thickness of the ion exchange membrane.
It is preferably 00%, particularly preferably 200 to 300%. The height of the linear ribs arranged near the edge on the opening side of the low hardness chamber frame is 20 times the thickness of the ion exchange membrane.
To 100%, particularly 40 to 80%
It is preferred that The width of these linear ribs is preferably 50 to 500% of the height of the linear ribs, and particularly preferably 100 to 300%.
【００１８】高硬度室枠には、室枠のイオン交換膜を介
して接する低硬度室枠にある室枠の開口部側の辺縁近傍
の線状リブ部の外側、かつ、該低硬度室枠の外周部側の
辺縁近傍の線状リブの内側に相当する位置に格子状リブ
を配置することが好ましい。The high hardness chamber frame is provided outside the linear rib portion near the opening side edge of the chamber frame in the low hardness chamber frame which is in contact with the low hardness chamber via the ion exchange membrane of the chamber frame. It is preferable to arrange the grid-like ribs at positions corresponding to the insides of the linear ribs near the periphery on the outer peripheral side of the frame.
【００１９】高硬度室枠の格子状リブの取付け位置は、
室枠のイオン交換膜に接する面の少なくとも一方である
ことが好ましく、特に両側であることが好ましい。高硬
度室枠の格子状リブの断面形状としては、半円形、半楕
円形、三角形、台形等であればよい。The mounting position of the grid-like rib of the high hardness chamber frame is as follows.
It is preferable that at least one of the surfaces of the chamber frame that is in contact with the ion exchange membrane, and it is particularly preferable that both surfaces be both sides. The cross-sectional shape of the lattice rib of the high hardness chamber frame may be a semicircle, a semiellipse, a triangle, a trapezoid, or the like.
【００２０】高硬度室枠の格子状リブの高さについて
は、イオン交換膜の厚さの１０〜１００％であることが
好ましく、特に、２０〜５０％であることが好ましい。
また、格子状リブを構成する線状リブの幅は、格子状リ
ブ高さの５０〜５００％であることが好ましく、特に、
１００〜３００％であることが好ましい。格子リブの格
子の大きさについては、室枠の大きさにより多少異なる
が、２〜６ｍｍ角の直角格子が好ましい。The height of the grid-like ribs of the high hardness chamber frame is preferably from 10 to 100% of the thickness of the ion exchange membrane, particularly preferably from 20 to 50%.
Further, the width of the linear ribs constituting the lattice ribs is preferably 50 to 500% of the height of the lattice ribs.
Preferably it is 100 to 300%. Although the size of the grid of the grid ribs slightly varies depending on the size of the chamber frame, a rectangular grid of 2 to 6 mm square is preferable.
【００２１】本発明の電気透析装置において、脱塩室内
にイオン交換体を充填した場合は、高純度の脱イオン水
が連続して得られるので特に好ましい。充填するイオン
交換体としては、三菱化学社製ダイヤイオンＳＫ−１
Ｂ、ＳＡ−１０Ａ（商品名）、バイエル社製レバチット
モノプラスＳ−１００、Ｍ−５００（商品名）などが挙
げられる。イオン交換体の形状としては、例えば、粒子
状、繊維状、不織布状を適宜採用できる。In the electrodialysis apparatus of the present invention, it is particularly preferable that the deionization chamber is filled with an ion exchanger because high-purity deionized water can be continuously obtained. As an ion exchanger to be packed, Diaion SK-1 manufactured by Mitsubishi Chemical Corporation is used.
B, SA-10A (trade name), Levitit Monoplus S-100, M-500 (trade name) manufactured by Bayer AG. As the shape of the ion exchanger, for example, a particle shape, a fiber shape, and a nonwoven fabric shape can be appropriately adopted.
【００２２】以下に、本発明の電気透析装置を、図面を
参照しながら詳しく説明する。図１に高硬度室枠、低硬
度室枠及びイオン交換膜を組合わせた本発明の一例の電
気透析装置の要部の断面を模式的に示す。図２は、図１
において脱塩室を形成した高硬度室枠１の平面図であ
る。図３は、図１において濃縮室を形成した低硬度室枠
３の平面図である。なお、本発明は図示された形状や構
成に限定されない。Hereinafter, the electrodialysis apparatus of the present invention will be described in detail with reference to the drawings. FIG. 1 schematically shows a cross section of a main part of an electrodialysis apparatus according to an example of the present invention in which a high hardness chamber frame, a low hardness chamber frame, and an ion exchange membrane are combined. FIG. 2 shows FIG.
2 is a plan view of a high hardness chamber frame 1 in which a desalting chamber is formed. FIG. 3 is a plan view of the low hardness chamber frame 3 in which the concentration chamber is formed in FIG. Note that the present invention is not limited to the illustrated shapes and configurations.
【００２３】図１には、高硬度室枠１と低硬度室枠３の
断面の状態を示す。脱イオン水製造装置等の電気透析装
置では、このような組合わせを繰り返して濃縮室と脱塩
室が交互に複数設けられている。これらの室枠間に陽イ
オン交換膜又は陰イオン交換膜２が挟まれる形で固定さ
れる。陽イオン交換膜又は陰イオン交換膜２は、フィル
タープレス様に締め付ける際に、高硬度室枠１の格子状
リブ４（図２、斜線部分）と低硬度室枠３の開口部側の
リブ５（図３、斜線部分）及び外周部側のリブ６（図
３、斜線部分）間で挟まれ、固定される。陽イオン交換
膜又は陰イオン交換膜２は、この低硬度室枠３の開口部
側のリブ５と外周部側のリブ６間に位置するように配置
される。FIG. 1 shows a cross section of the high hardness chamber frame 1 and the low hardness chamber frame 3. In an electrodialysis apparatus such as a deionized water production apparatus, a plurality of concentration chambers and a plurality of desalination chambers are provided alternately by repeating such a combination. The cation exchange membrane or the anion exchange membrane 2 is fixed between these chamber frames. When the cation exchange membrane or the anion exchange membrane 2 is tightened like a filter press, the lattice ribs 4 (the hatched portion in FIG. 2) of the high hardness chamber frame 1 and the ribs 5 on the opening side of the low hardness chamber frame 3 are used. (FIG. 3, hatched portion) and the outer peripheral side rib 6 (FIG. 3, hatched portion) are fixed. The cation exchange membrane or anion exchange membrane 2 is disposed between the rib 5 on the opening side and the rib 6 on the outer peripheral side of the low hardness chamber frame 3.
【００２４】図２、３は、各室枠に被処理水供給口１
１、濃縮液供給口１２、濃縮液排出口１３、脱イオン水
排出口１４の形成されている様子を示す。高硬度室枠１
には、被処理水供給口１１から、脱塩室内に、被処理水
を導入するためのダクト（図示せず）及び脱塩室内から
脱イオン水を脱イオン水排出口１４へ排出するダクト
（図示せず）が形成されている。FIGS. 2 and 3 show that each chamber frame has a water supply port 1 to be treated.
1 shows a state in which a concentrate supply port 12, a concentrate discharge port 13, and a deionized water discharge port 14 are formed. High hardness chamber frame 1
A duct (not shown) for introducing the water to be treated into the desalination chamber from the water supply port 11 and a duct for discharging the deionized water from the desalination chamber to the deionized water outlet 14 ( (Not shown).
【００２５】本発明の電気透析装置は、この図１で示し
た各室枠及び陽イオン交換膜又は陰イオン交換膜をフィ
ルタープレス様に締め付けるので、各室枠内の液が外部
へ液リークするには締め付け構成の異なる開口部側の線
状リブ５、格子状リブ４に続いて外周部側の線状リブ６
から液リークしなければならない。したがって、高温度
下においてもシール性が維持される。In the electrodialysis apparatus of the present invention, since each chamber frame and the cation exchange membrane or the anion exchange membrane shown in FIG. 1 are tightened like a filter press, the liquid in each chamber frame leaks to the outside. The linear ribs 5 on the opening side and the linear ribs 6 on the outer peripheral side having different fastening configurations
Liquid leaks from the Therefore, the sealing property is maintained even at a high temperature.
【００２６】[0026]
【実施例】以下に、本発明を実施例に基づきさらに詳し
く説明するが、本発明はこれらに限定されない。EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited thereto.
【００２７】[例１（実施例）]下記仕様で電気透析装置
を作成した。両端に陽極室と陰極室を配置し、陽イオン
交換膜（スルホン酸基を交換基とする旭硝子社製商品名
ＣＭＥ）と陰イオン交換膜（第４級アンモニウムを交換
基とする旭硝子社製商品名ＡＭＥ）を交互に配列し、脱
塩室を形成する室枠として高硬度室枠（室枠外寸：長さ
５５０ｍｍ、幅１８０ｍｍ、厚さ８ｍｍ、材質：ポリプ
ロピレン、硬さ：９９、軟化温度：１７０℃、圧縮永久
ひずみ：３０％）と濃縮室を形成する室枠として低硬度
室枠（室枠外寸：長さ５５０ｍｍ、幅１８０ｍｍ、厚さ
１．５ｍｍ、材質：オレフィン系エラストマー、三菱化
学社製商品名サーモラン３８０１、硬さ：８６、軟化温
度：１６５℃、圧縮永久ひずみ：５２％）を交互に配置
した。脱塩室には、イオン交換体（旭硝子社製商品名Ａ
ＲＥ、ＣＲＥ）を充填し全３０室配列し、濃縮室は全３
１室配列して、上述に示す構成の装置を締め付け圧力
２．０ＭＰａ（実体部）でフィルタープレス様に締め付
けた。Example 1 (Embodiment) An electrodialyzer was prepared according to the following specifications. An anode compartment and a cathode compartment are arranged at both ends, and a cation exchange membrane (CME, trade name of Asahi Glass Co., Ltd. with sulfonic acid group as an exchange group) and an anion exchange membrane (Asahi Glass Co., Ltd. product with exchange group of quaternary ammonium) AME) are alternately arranged, and a high-hardness chamber frame (chamber outer dimension: length 550 mm, width 180 mm, thickness 8 mm, material: polypropylene, hardness: 99, softening temperature: 170 ° C., compression set: 30%) and a low hardness chamber frame (chamber outer dimension: length 550 mm, width 180 mm, thickness 1.5 mm, material: olefin elastomer, Mitsubishi Chemical Corporation) (Trade name: Thermolan 3801, hardness: 86, softening temperature: 165 ° C, compression set: 52%) were alternately arranged. In the desalting chamber, an ion exchanger (Asahi Glass Co., Ltd. product name A
RE, CRE), and a total of 30 chambers are arranged.
One chamber was arranged, and the apparatus having the above-described configuration was tightened like a filter press at a tightening pressure of 2.0 MPa (substantial part).
【００２８】高硬度室枠には、格子サイズが４ｍｍ角
で、断面形状が三角、高さが０．２ｍｍの格子状リブを
両面に取付けた。低硬度室枠には、断面形状が半円形の
線状リブを両面に取付け、開口部側には高さが０．６ｍ
ｍの線状リブを、外周部側には高さが１．５ｍｍの線状
リブを設けた。A grid-shaped rib having a grid size of 4 mm square, a triangular cross section, and a height of 0.2 mm was attached to both sides of the high hardness chamber frame. On the low hardness chamber frame, linear ribs with a semicircular cross section are attached to both sides, and the height is 0.6 m on the opening side.
A linear rib having a height of 1.5 mm was provided on the outer peripheral side.
【００２９】被処理水としては、温度５０℃、電気伝導
度１０μｓ／ｃｍの液を用い、脱塩室には、流量ＳＶ
（空間速度）＝２００ｈ-1、入口圧力０．２０ＭＰａに
て、また、濃縮室には流量ＬＶ（線速度）＝６ｃｍ／ｓ
ｅｃ、入口圧力０．１５ＭＰａにて被処理水を供給し、
通水と同時に両電極室の電極板に直流電圧２００Ｖを印
加した。As the water to be treated, a liquid having a temperature of 50 ° C. and an electric conductivity of 10 μs / cm was used.
(Space velocity) = 200 h −1 , inlet pressure 0.20 MPa, and flow rate LV (linear velocity) = 6 cm / s in the concentration chamber
ec, the water to be treated is supplied at an inlet pressure of 0.15 MPa,
A DC voltage of 200 V was applied to the electrode plates of both electrode chambers simultaneously with the passage of water.
【００３０】その結果、連続運転１００ｈ経過後での脱
塩室より流出する処理水の比抵抗値は１６ＭΩ・ｃｍで
あり、外部への液リークは認められなかった。さらに、
連続運転１０００ｈ経過後においても脱塩室より流出す
る処理水の比抵抗値は、１６ＭΩ・ｃｍであり、外部へ
の液リークは認められなかった。また、締め付け圧力
（シール圧力）は、１．４ＭＰａであった。As a result, the resistivity of the treated water flowing out of the desalting chamber after 100 hours of continuous operation was 16 MΩ · cm, and no liquid leakage to the outside was observed. further,
After 1000 hours of continuous operation, the specific resistance of the treated water flowing out of the desalting chamber was 16 MΩ · cm, and no liquid leakage to the outside was observed. The tightening pressure (seal pressure) was 1.4 MPa.
【００３１】[例２（比較例）]脱塩室を形成する室枠と
濃縮室を形成する室枠にいずれもポリプロピレン製の材
質を使用し、イオン交換膜と各室枠間にはシートパッキ
ンとしてＥＰＤＭシート（硬さ７５、厚さ０．５ｍｍ）
を用いた以外は、例１と同様に電気透析装置を作成し、
試験を実施した。Example 2 (Comparative Example) Polypropylene is used for the chamber frame forming the desalting chamber and the chamber frame forming the concentration chamber, and sheet packing is provided between the ion exchange membrane and each chamber frame. As EPDM sheet (hardness 75, thickness 0.5mm)
An electrodialysis device was prepared in the same manner as in Example 1 except that
The test was performed.
【００３２】その結果、連続運転１００ｈ経過後での脱
塩室より流出する処理水の比抵抗値は１６ＭΩ・ｃｍで
あり、外部への液リークは認められなかった。しかし、
連続運転１０００ｈ経過後では、脱塩室より流出する処
理水の比抵抗値は、１５ＭΩ・ｃｍであり、外部への液
リーク量は８５ｍｌ／ｈであった。また、締め付け圧力
（シール圧力）は、０．５ＭＰａであった。As a result, the resistivity of the treated water flowing out of the desalting chamber after 100 hours of continuous operation was 16 MΩ · cm, and no liquid leakage to the outside was observed. But,
After 1000 hours of continuous operation, the specific resistance of the treated water flowing out of the desalting chamber was 15 MΩ · cm, and the amount of liquid leaked to the outside was 85 ml / h. The tightening pressure (seal pressure) was 0.5 MPa.
【００３３】[評価]以上の結果から明らかなように、本
発明の装置は、従来の室枠を用いた電気透析装置よりも
長期間液リークの発生もなく、本発明装置の使用により
得られた処理水は比抵抗値の低下もなく、比較例に比べ
て優れた水質のものとなっている。また、運転１０００
ｈ経過後のシール圧力は比較例に比べて高く維持されて
おり、これは、室枠材質による効果が充分に発揮されて
いるといえる。[Evaluation] As is evident from the above results, the device of the present invention has no liquid leakage for a longer period of time than the electrodialysis device using a conventional chamber frame, and is obtained by using the device of the present invention. The treated water does not decrease in specific resistance value, and has excellent water quality as compared with the comparative example. In addition, operation 1000
The sealing pressure after elapse is maintained higher than that in the comparative example, which means that the effect of the chamber frame material is sufficiently exerted.
【００３４】[0034]
【発明の効果】本発明によれば脱塩室を形成する室枠及
び濃縮室を形成する室枠を、一方は高硬度材質を、もう
一方は低硬度材質とすることにより、低硬度室枠全体に
パッキン効果をもたらし、高温度下での圧縮永久ひずみ
によるシール圧力の低下を抑制し、液リークを防止でき
る。その結果、長期間安定した脱塩性能を維持して良好
な脱イオン水を製造できる。また、さらに、各室枠の少
なくとも片面にリブを具備する場合には、膜及び室枠間
のシール性をより高めることができる。According to the present invention, the chamber frame forming the desalting chamber and the chamber frame forming the concentrating chamber are formed of a high-hardness material and a low-hardness material for the other, so that the low-hardness chamber frame is formed. A packing effect is provided as a whole, and a reduction in sealing pressure due to compression set at high temperatures can be suppressed, and liquid leakage can be prevented. As a result, good deionized water can be produced while maintaining stable desalination performance for a long time. Further, when a rib is provided on at least one surface of each chamber frame, the sealing property between the membrane and the chamber frame can be further improved.
【図１】本発明の電気透析装置の一例の要部を説明する
ための断面図。FIG. 1 is a cross-sectional view for explaining a main part of an example of an electrodialysis apparatus according to the present invention.
【図２】図１で示した高硬度室枠のイオン交換膜と接す
る面の説明図。FIG. 2 is an explanatory view of a surface of the high-hardness chamber frame shown in FIG. 1 which is in contact with an ion exchange membrane.
【図３】図１で示した低硬度室枠のイオン交換膜と接す
る面の説明図。FIG. 3 is an explanatory view of a surface of the low hardness chamber frame shown in FIG. 1 which is in contact with an ion exchange membrane.
１：高硬度室枠 ２：陽イオン交換膜又は陰イオン交換膜 ３：低硬度室枠 ４：高硬度室枠上の格子状リブ ５：低硬度室枠の開口部側リブ ６：低硬度室枠の外周部側リブ １１：被処理液供給口 １２：濃縮液供給口 １３：濃縮液排出口 １４：脱イオン水排出口 1: High hardness chamber frame 2: Cation exchange membrane or anion exchange membrane 3: Low hardness chamber frame 4: Lattice rib on high hardness chamber frame 5: Opening side rib of low hardness chamber frame 6: Low hardness chamber Rib on outer peripheral side of frame 11: Supply port of liquid to be treated 12: Supply port of concentrate 13: Concentrate discharge port 14: Deionized water discharge port
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 4D006 GA17 KB01 KB11 MA13 MA14 MC62 PB06 PC02 4D025 AA04 BA22 BA25 BA26 DA05 DA06 4D061 DA03 DB13 EA09 EB01 EB13 EB22 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4D006 GA17 KB01 KB11 MA13 MA14 MC62 PB06 PC02 4D025 AA04 BA22 BA25 BA26 DA05 DA06 4D061 DA03 DB13 EA09 EB01 EB13 EB22
Claims (6)
膜と複数の陰イオン交換膜とを交互に配列し、開口部を
有する板状の部材からなる室枠が陽イオン交換膜及び陰
イオン交換膜の間に配置され、室枠の開口部の内側にあ
り陽極側が陰イオン交換膜で区画され陰極側が陽イオン
交換膜で区画された脱塩室と、室枠の開口部の内側にあ
り陽極側が陽イオン交換膜で区画され陰極側が陰イオン
交換膜で区画された濃縮室とを交互に形成して構成され
る電気透析装置であって、脱塩室を形成する室枠又は濃
縮室を形成する室枠の一方がＪＩＳ Ｋ６３０１による
硬さが９９以上の材質よりなる高硬度室枠であり、他方
がＪＩＳ Ｋ６３０１による硬さが８０〜９６の材質よ
りなる低硬度室枠である電気透析装置。A plurality of cation exchange membranes and a plurality of anion exchange membranes are alternately arranged between an anode and a cathode, and a chamber formed of a plate-like member having an opening is a cation exchange membrane. And a desalination chamber, which is disposed between the anion exchange membrane and the inside of the opening of the chamber frame, the anode side is partitioned by the anion exchange membrane, and the cathode side is partitioned by the cation exchange membrane, An electrodialysis apparatus which is formed by forming alternately a concentrating chamber in which an anode side is partitioned by a cation exchange membrane and a cathode side is partitioned by an anion exchange membrane, and a chamber frame forming a desalting chamber. One of the chamber frames forming the enrichment chamber is a high hardness chamber frame made of a material having a hardness of 99 or more according to JIS K6301, and the other is a low hardness chamber frame made of a material having a hardness of 80 to 96 according to JIS K6301. Electrodialysis equipment.
１２０℃以上、かつ、ＪＩＳ Ｋ６３０１による圧縮永
久ひずみが６０％以下である請求項１に記載の電気透析
装置。2. The electrodialysis apparatus according to claim 1, wherein the high hardness chamber frame or the low hardness chamber frame has a softening temperature of 120 ° C. or more and a compression set according to JIS K6301 of 60% or less.
交換膜に接する面の少なくとも一方において、室枠の開
口部側の辺縁近傍に一つ以上の線状リブを有し、室枠の
外周部側の辺縁近傍に一つ以上の線状リブを有する請求
項１又は２に記載の電気透析装置。3. The low-hardness chamber frame has at least one linear rib in the vicinity of the opening side of the chamber frame on at least one of the surfaces in contact with the cation exchange membrane or the anion exchange membrane. The electrodialysis device according to claim 1, further comprising one or more linear ribs near an outer peripheral edge of the frame.
ブの高さが、室枠の開口部側の辺縁近傍の線状リブの高
さより大きく、この面に接する陽イオン交換膜又は陰イ
オン交換膜の外周縁が該外周部側の辺縁近傍の線状リブ
の内側になるよう配置される請求項３に記載の電気透析
装置。4. The height of the linear ribs near the periphery on the outer peripheral side of the low hardness chamber frame is larger than the height of the linear ribs near the periphery on the opening side of the chamber frame. The electrodialysis apparatus according to claim 3, wherein the outer peripheral edge of the ion exchange membrane or the anion exchange membrane is arranged inside the linear rib near the peripheral edge on the outer peripheral side.
交換膜に接する面の少なくとも一方において、この高硬
度室枠に陽イオン交換膜又は陰イオン交換膜を介して接
する低硬度室枠にある室枠の開口部側の辺縁近傍の線状
リブ部の外側、かつ、該低硬度室枠の外周部側の辺縁近
傍の線状リブの内側に相当する位置に、格子状リブを有
する請求項３又は４に記載の電気透析装置。5. A low hardness chamber frame which is in contact with the high hardness chamber frame via a cation exchange membrane or an anion exchange membrane on at least one of the surfaces of the high hardness chamber frame which is in contact with the cation exchange membrane or the anion exchange membrane. The grid ribs are located outside the linear ribs near the opening side edge of the chamber frame and inside the linear ribs near the outer periphery side edge of the low hardness chamber frame. The electrodialysis device according to claim 3, wherein the device comprises:
請求項１〜５のいずれかに記載の電気透析装置。6. The electrodialysis apparatus according to claim 1, wherein an ion exchanger is filled in the desalting chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000182064A JP2002001070A (en) | 2000-06-16 | 2000-06-16 | Apparatus for electrodialysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000182064A JP2002001070A (en) | 2000-06-16 | 2000-06-16 | Apparatus for electrodialysis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002001070A true JP2002001070A (en) | 2002-01-08 |
Family
ID=18682902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000182064A Pending JP2002001070A (en) | 2000-06-16 | 2000-06-16 | Apparatus for electrodialysis |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002001070A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004096416A2 (en) * | 2003-04-25 | 2004-11-11 | Us Filter Corporation | Injection bonded articles and methods |
| US8585882B2 (en) | 2007-11-30 | 2013-11-19 | Siemens Water Technologies Llc | Systems and methods for water treatment |
| US9023185B2 (en) | 2006-06-22 | 2015-05-05 | Evoqua Water Technologies Llc | Low scale potential water treatment |
| CN106139908A (en) * | 2015-05-11 | 2016-11-23 | Agc工程株式会社 | Filter press-type electrodialysis plant |
-
2000
- 2000-06-16 JP JP2000182064A patent/JP2002001070A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004096416A2 (en) * | 2003-04-25 | 2004-11-11 | Us Filter Corporation | Injection bonded articles and methods |
| WO2004096416A3 (en) * | 2003-04-25 | 2005-05-26 | United States Filter Corp | Injection bonded articles and methods |
| JP2006515228A (en) * | 2003-04-25 | 2006-05-25 | ユーエスフィルター・コーポレイション | Injection-bonded article and its manufacturing method |
| US7404884B2 (en) | 2003-04-25 | 2008-07-29 | Siemens Water Technologies Holding Corp. | Injection bonded articles and methods |
| US9023185B2 (en) | 2006-06-22 | 2015-05-05 | Evoqua Water Technologies Llc | Low scale potential water treatment |
| US9586842B2 (en) | 2006-06-22 | 2017-03-07 | Evoqua Water Technologies Llc | Low scale potential water treatment |
| US8585882B2 (en) | 2007-11-30 | 2013-11-19 | Siemens Water Technologies Llc | Systems and methods for water treatment |
| US9011660B2 (en) | 2007-11-30 | 2015-04-21 | Evoqua Water Technologies Llc | Systems and methods for water treatment |
| US9637400B2 (en) | 2007-11-30 | 2017-05-02 | Evoqua Water Technologies Llc | Systems and methods for water treatment |
| CN106139908A (en) * | 2015-05-11 | 2016-11-23 | Agc工程株式会社 | Filter press-type electrodialysis plant |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9446971B2 (en) | Techniques for promoting current efficiency in electrochemical separation systems and methods | |
| US20090218227A1 (en) | Deionization apparatus and method of manufacturing the same | |
| JPH06339683A (en) | Electrolyzed water generation device | |
| KR20100036495A (en) | Deionization apparatus and electrode module using thereof, and manufacturing method the same | |
| US11638886B2 (en) | Spacers for ion-exchange device | |
| US20170001146A1 (en) | Disposable Membrane Stacks | |
| KR101796356B1 (en) | Fuel cell | |
| JP2014014776A (en) | Electric dialysis device | |
| JP2002001070A (en) | Apparatus for electrodialysis | |
| JP2699256B2 (en) | Electric regeneration type continuous ion exchange device and its use | |
| JP5114441B2 (en) | Desalination chamber container, electrode chamber cap, and electrical deionized water production device | |
| CN113272476B (en) | Cell frame element, electrolytic cell and electrodialysis cell | |
| JP3827647B2 (en) | Ion exchange membrane electrolyzer with gas diffusion electrode | |
| JP2003024947A (en) | Electrodialytic cell | |
| JPS6330045B2 (en) | ||
| JPS5964786A (en) | Single-electrode type electrolytic cell adapted to ion exchange membrane method | |
| JP2001276580A (en) | Electrodialytic apparatus | |
| JPS6130806B2 (en) |