JP2003126862A - Apparatus and method for electric deionization - Google Patents
Apparatus and method for electric deionizationInfo
- Publication number
- JP2003126862A JP2003126862A JP2001325285A JP2001325285A JP2003126862A JP 2003126862 A JP2003126862 A JP 2003126862A JP 2001325285 A JP2001325285 A JP 2001325285A JP 2001325285 A JP2001325285 A JP 2001325285A JP 2003126862 A JP2003126862 A JP 2003126862A
- Authority
- JP
- Japan
- Prior art keywords
- chamber
- exchange resin
- water
- ion exchange
- partition member
- 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.)
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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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は半導体、液晶、製
薬、食品工業等の各種の産業において利用される電気式
脱イオン装置に係わり、特に処理水の比抵抗値と弱電解
質アニオンの除去率の向上を図り、高純度の純水を連続
的に製造することができる電気式脱イオン装置に関す
る。また、本発明は、この電気式脱イオン装置を用いた
脱イオン方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric deionization apparatus used in various industries such as semiconductors, liquid crystals, pharmaceuticals, and food industries, and more particularly, to a specific resistance value of treated water and a removal rate of weak electrolyte anions. The present invention relates to an electric deionization device capable of improving and continuously producing high-purity pure water. The present invention also relates to a deionization method using this electric deionization apparatus.
【０００２】[0002]
【従来の技術】電気式脱イオン装置は、電極（陽極と陰
極）同士の間に複数のカチオン交換膜とアニオン交換膜
とを交互に配列して脱塩室と濃縮室とを交互に形成し、
脱塩室にイオン交換樹脂を充填した構成を有する。この
電気式脱イオン装置にあっては陽極、陰極間に電圧を印
加しながら脱塩室に被処理水を流入させると共に、濃縮
室に濃縮水を流入させ被処理水中の不純物イオンを除去
し、脱イオン水を製造する。2. Description of the Related Art In an electric deionization apparatus, a plurality of cation exchange membranes and anion exchange membranes are alternately arranged between electrodes (anode and cathode) to alternately form a desalting chamber and a concentrating chamber. ,
It has a structure in which a deionization chamber is filled with an ion exchange resin. In this electric deionization apparatus, while applying the voltage between the anode and the cathode, the water to be treated is caused to flow into the deionization chamber, and the concentrated water is caused to flow into the concentration chamber to remove the impurity ions in the water to be treated, Produces deionized water.
【０００３】図６はこの電気式脱イオン装置の基本的な
構成を示す分解図である。FIG. 6 is an exploded view showing the basic structure of this electric deionization apparatus.
【０００４】陰極側のエンドプレート１に沿って陰極電
極板２が配置され、この陰極電極板２の周縁部に枠状の
陰極用スペーサ３が重ね合わされる。この陰極用スペー
サ３の上にカチオン交換膜４、脱塩室形成用の枠状フレ
ーム５、アニオン交換膜６及び濃縮室形成用の枠状フレ
ーム７がこの順に重ね合わされる。このカチオン交換膜
４、脱塩室形成用の枠状フレーム５、アニオン交換膜６
及び濃縮室形成用の枠状フレーム７を１単位として多数
重ね合わされる。即ち、膜４、フレーム５、膜６、フレ
ーム７が連続して繰り返し積層される。最後のアニオン
交換膜６に対し枠状の陽極用スペーサ８を介して陽極電
極板９が重ね合わされ、その上に陽極側エンドプレート
１０が重ね合わされて積層体とされる。この積層体はボ
ルト等によって締め付けられる。A cathode electrode plate 2 is arranged along the end plate 1 on the cathode side, and a frame-shaped cathode spacer 3 is superposed on the peripheral portion of the cathode electrode plate 2. A cation exchange membrane 4, a deionization chamber forming frame 5, a anion exchange membrane 6 and a concentration chamber forming frame 7 are superposed on the cathode spacer 3 in this order. The cation exchange membrane 4, a frame 5 for forming a desalting chamber, an anion exchange membrane 6
Also, a large number of frame-shaped frames 7 for forming the concentrating chamber are stacked as one unit. That is, the film 4, the frame 5, the film 6, and the frame 7 are continuously and repeatedly laminated. An anode electrode plate 9 is superposed on the last anion exchange membrane 6 with a frame-shaped anode spacer 8 interposed therebetween, and an anode side end plate 10 is superposed thereon to form a laminated body. This laminated body is tightened with bolts or the like.
【０００５】上記の脱塩室用フレーム５の内側スペース
が脱塩室となっており、この脱塩室にはイオン交換樹脂
等のイオン交換樹脂５Ｒが充填される。濃縮室用フレー
ム７の内側が濃縮室となっている。この濃縮室にはメッ
シュスペーサなどが配置される。The inner space of the desalting chamber frame 5 is a desalting chamber, and the desalting chamber is filled with an ion exchange resin 5R such as an ion exchange resin. The inside of the concentrating chamber frame 7 is the concentrating chamber. A mesh spacer or the like is arranged in this concentrating chamber.
【０００６】このような装置にあっては、陽極９と陰極
２の間に直流電流を通じ、且つ被処理水（原水）を被処
理水流入ライン１１を通して脱塩室内に通水せしめ、ま
た、濃縮水を濃縮水流入ライン１２を通して濃縮室８内
に通水せしめる。脱塩室内に流入してきた被処理水はイ
オン交換樹脂の充填層を流下し、その際、該被処理水中
の不純物イオンが除かれて脱イオン水となり、これが脱
イオン水流出ライン１３を経て流出する。In such an apparatus, a direct current is passed between the anode 9 and the cathode 2, and the water to be treated (raw water) is made to flow through the treated water inflow line 11 into the desalination chamber, and the water is concentrated. Water is passed through the concentrated water inflow line 12 into the concentrating chamber 8. The water to be treated that has flowed into the demineralization chamber flows down the packed bed of ion exchange resin, and at that time, the impurity ions in the water to be treated are removed to become deionized water, which flows out through the deionized water outflow line 13. To do.
【０００７】一方、濃縮室内に通水された濃縮水は濃縮
室内を流下するときに、イオン交換膜４，６を介して移
動してくる不純物イオンを受け取り、不純物イオンを濃
縮した濃縮水として濃縮水流出ライン１４より流出す
る。電極室にはそれぞれ導入ライン１５，１６及び取出
ライン１７，１８を介して電極水が流通される。On the other hand, when the concentrated water passed through the concentrating chamber flows down in the concentrating chamber, it receives the impurity ions moving through the ion exchange membranes 4 and 6, and concentrates the impurity ions as concentrated water. It flows out from the water outflow line 14. Electrode water is circulated in the electrode chambers via introduction lines 15 and 16 and extraction lines 17 and 18, respectively.
【０００８】ところで、脱塩室内に上下方向に仕切り用
リブを設け、脱塩室内を上下方向に長い小室に区画した
電気式脱イオン装置が特公平４−７２５６７号公報に記
載されている。このように脱塩室内をリブによって細長
い小室に区画し、各小室にそれぞれイオン交換樹脂を充
填した電気式脱イオン装置にあっては、脱塩室の入口か
ら出口に向って局部的に偏って水が流れるチャンネル化
現象が防止されると共に、脱塩室内においてイオン交換
樹脂が圧縮されたり移動したりすることが防止される。By the way, Japanese Patent Publication No. 4-72567 discloses an electric deionization device in which a partition rib is provided in the vertical direction in the demineralization chamber and the demineralization chamber is divided into small chambers long in the vertical direction. In this way, the deionization chamber is divided into elongated small chambers by the ribs, and in the electric deionization device in which each small chamber is filled with the ion exchange resin, the deionization chamber is locally biased from the inlet to the outlet. A channel phenomenon in which water flows is prevented, and the ion exchange resin is prevented from being compressed or moved in the desalting chamber.
【０００９】この特公平４−７２５６７号の電気式脱イ
オン装置にあっては、脱塩室を上下に細長い小室に区画
するため、小室の数に制限がある。即ち、あまり多くの
小室を形成することができない。また、リブによって水
の左右方向への流れが阻止されるため、水とイオン交換
樹脂との接触効率が悪い。さらに、小室の下部にあって
はイオン交換樹脂が圧縮され、上部に隙間があき、イオ
ン交換樹脂の充填率が低くなりがちであるという短所も
ある。In the electric deionization apparatus of Japanese Patent Publication No. 4-72567, since the deionization chamber is divided into vertically elongated small chambers, the number of small chambers is limited. That is, too many small chambers cannot be formed. Moreover, since the rib blocks the flow of water in the left-right direction, the contact efficiency between the water and the ion exchange resin is poor. Further, the ion exchange resin is compressed in the lower part of the small chamber, and there is a gap in the upper part, so that the filling rate of the ion exchange resin tends to be low.
【００１０】本出願人は、このような種々の短所を克服
し、水とイオン交換樹脂との接触効率が高く、イオン交
換樹脂等の充填密度も高い電気式脱イオン装置を特開２
００１−２５６４７号にて提案している。The applicant of the present invention has proposed an electric deionization apparatus which overcomes these various disadvantages and has a high contact efficiency between water and an ion exchange resin and a high packing density of the ion exchange resin.
Proposed in 001-25647.
【００１１】同号の電気式脱イオン装置は、脱塩室内を
区画部材によって多数の小室に区画し、各小室にイオン
交換樹脂を充填したものである。この各小室に臨む区画
部材の少なくとも一部は、脱塩室内の平均的な水の流れ
方向に対して傾斜しており、この傾斜した部分は、水は
通過させるが、イオン交換樹脂は通過させない構造とな
っている。このため、脱塩室内に流入した水の少なくと
も一部は、平均的な水の流れ方向に対し斜め方向に流れ
るようになり、脱塩室内の全体に分散して流れる。従っ
て、水とイオン交換樹脂との接触効率が向上し、脱イオ
ン特性が向上する。In the electric deionization apparatus of the same item, the deionization chamber is divided into a large number of small chambers by partition members, and each small chamber is filled with an ion exchange resin. At least a part of the partition member facing each of the small chambers is inclined with respect to the average flow direction of water in the deionization chamber, and the inclined portion allows water to pass but does not allow ion exchange resin to pass. It has a structure. Therefore, at least a part of the water that has flowed into the desalination chamber flows diagonally with respect to the average flow direction of the water, and is dispersed and flows throughout the desalination chamber. Therefore, the contact efficiency between water and the ion exchange resin is improved, and the deionization property is improved.
【００１２】この小室を平均的な水の流れ方向及びこれ
と直交方向のいずれにおいても膜面に沿って複数個配置
することにより、（例えば縦横に多数配置することによ
り、）水とイオン交換樹脂との接触効率がきわめて高い
ものとなる。また、各小室内の上下方向の高さが小さく
なり、イオン交換樹脂が局部的に圧縮されにくくなる。
従って、小室に隙間が生じることがなく、イオン交換樹
脂の充填密度が高い。By arranging a plurality of these small chambers along the membrane surface in both the average water flow direction and the direction orthogonal thereto, the water and the ion exchange resin can be arranged. The contact efficiency with is extremely high. In addition, the height of each small chamber in the vertical direction becomes small, and it becomes difficult for the ion exchange resin to be locally compressed.
Therefore, no gap is created in the small chamber, and the packing density of the ion exchange resin is high.
【００１３】この小室は、イオン交換膜面に投影した形
状が六角形又は四角形であってもよい。六角形の場合に
は、１対の平行な辺が平均的な水の流れ方向となるよう
に各小室を配置するのが好ましい。四角形の場合には、
各辺が平均的な水の流れ方向に対し傾斜するように配置
する。The small chamber may have a hexagonal shape or a quadrangular shape projected on the surface of the ion exchange membrane. In the case of a hexagon, it is preferable to arrange the small chambers so that the pair of parallel sides are in the average water flow direction. For a square,
Arrange so that each side is inclined with respect to the average water flow direction.
【００１４】１つの小室内に１種類のイオン交換特性の
イオン交換樹脂のみを充填してもよく、複数種類のイオ
ン交換特性のイオン交換樹脂を充填してもよい。例えば
１つの小室内にアニオン交換体と両性イオン交換樹脂と
を混合して充填してもよい。One small chamber may be filled with only one type of ion exchange resin having ion exchange characteristics, or may be filled with a plurality of types of ion exchange resin having ion exchange characteristics. For example, an anion exchanger and an amphoteric ion exchange resin may be mixed and filled in one small chamber.
【００１５】[0015]
【発明が解決しようとする課題】電気式脱イオン装置
は、被処理水中のイオンを電極間の電位差に基づいて脱
塩室から濃縮室へ移動させるものであるから、炭酸やシ
リカのような弱電解質成分は除去されにくい。The electric deionization apparatus moves ions in the water to be treated from the desalting chamber to the concentrating chamber based on the potential difference between the electrodes. The electrolyte component is difficult to remove.
【００１６】たとえば市水を逆浸透膜装置で処理し、そ
の透過水を電気式脱イオン装置で処理した場合、比抵抗
値１０ＭΩ・ｃｍ前後の脱イオン水が得られる。しかし
ながら給水の炭酸濃度が１０ｐｐｍ以上と高い場合、比
抵抗値は１〜５ＭΩ・ｃｍに低下する。従って、比抵抗
値が高い処理水とするために、電気脱イオン装置の前段
に脱炭酸装置をあらかじめ設置しなければならない。For example, when city water is treated by a reverse osmosis membrane device and the permeated water is treated by an electric deionization device, deionized water having a specific resistance value of about 10 MΩ · cm is obtained. However, when the carbon dioxide concentration of the feed water is as high as 10 ppm or more, the specific resistance value decreases to 1 to 5 MΩ · cm. Therefore, in order to obtain treated water having a high specific resistance value, a decarbonation device must be installed in advance before the electric deionization device.
【００１７】また、従来の電気式脱イオン装置による
と、シリカの除去率は７０〜９０％程度の低い値であ
る。そのため、電気式脱イオン装置の後段に設置された
ポリッシャーの再生頻度あるいは交換頻度が高くなる。Further, according to the conventional electric deionization apparatus, the removal rate of silica is a low value of about 70 to 90%. Therefore, the frequency of regeneration or replacement of the polisher installed in the latter stage of the electric deionization apparatus becomes high.
【００１８】本発明は、比抵抗値１０ＭΩ・ｃｍ以上の
安定した処理水とシリカの除去率を飛躍的に向上し得る
電気式脱イオン装置及び脱イオン方法を提供することを
目的とするものである。An object of the present invention is to provide an electric deionization apparatus and a deionization method capable of dramatically improving the removal rate of stable treated water having a specific resistance value of 10 MΩ · cm or more and silica. is there.
【００１９】[0019]
【課題を解決するための手段】本発明の電気式脱イオン
装置は、電極同士の間に複数のカチオン交換膜とアニオ
ン交換膜とを交互に配列して脱塩室と濃縮室とを交互に
形成し、脱塩室にイオン交換樹脂を充填し、脱塩室に被
処理水を通水し、濃縮室に濃縮水を通水するようにした
電気式脱イオン装置であって、該脱塩室内に区画部材が
配置され、該区画部材と該カチオン交換膜及びアニオン
交換膜とによって囲まれた多数の小室が該脱塩室内に形
成されており、各小室にそれぞれイオン交換樹脂が充填
されており、各小室に臨む区画部材の少なくとも一部は
該脱塩室内の平均的な水の流れ方向に対し傾斜してお
り、該区画部材の少なくとも傾斜した部分は、水を通過
させるがイオン交換樹脂の通過を阻止する構造となって
いる電気式脱イオン装置において、該イオン交換樹脂
は、アニオン交換樹脂とカチオン交換樹脂とを含む混合
物であり、該アニオン交換樹脂とカチオン交換樹脂との
合量に対するアニオン交換樹脂の割合が６０〜８０体積
％であることを特徴とする。In the electric deionization apparatus of the present invention, a plurality of cation exchange membranes and anion exchange membranes are alternately arranged between electrodes so that a desalting chamber and a concentrating chamber are alternately arranged. An electric deionization apparatus for forming a desalting chamber, filling the desalting chamber with an ion exchange resin, passing water to be treated through the desalting chamber, and passing concentrated water through the concentrating chamber. A partition member is arranged in the chamber, and a number of small chambers surrounded by the partition member, the cation exchange membrane and the anion exchange membrane are formed in the desalination chamber, and each small chamber is filled with an ion exchange resin. At least a part of the partition member facing each small chamber is inclined with respect to the average flow direction of water in the desalting chamber, and at least the inclined part of the partition member allows water to pass through but is an ion exchange resin. Deionization with a structure that blocks the passage of water In the storage, the ion exchange resin is a mixture containing an anion exchange resin and a cation exchange resin, and the ratio of the anion exchange resin to the total amount of the anion exchange resin and the cation exchange resin is 60 to 80% by volume. Is characterized by.
【００２０】また、本発明の脱イオン方法は、かかる本
発明の電気脱イオン装置を用いて炭酸濃度１０ｍｇＣＯ
２／Ｌ以上の被処理水を脱イオン処理することを特徴と
するものである。The deionization method of the present invention uses the electric deionization apparatus of the present invention to obtain a carbon dioxide concentration of 10 mgCO
The feature is that deionized treatment of water to be treated of 2 / L or more is performed.
【００２１】弱電解質である炭酸の電気式脱イオン装置
における除去機構は次のように考えられている。被処理
水の炭酸（ＣＯ２）は、電気式脱イオン装置内において
水酸化物イオン（ＯＨ−）とのイオン化反応により重炭
酸イオンに変わる（ＣＯ２＋ＯＨ−→ＨＣＯ３ −）。The removal mechanism of carbonic acid, which is a weak electrolyte, in an electric deionization apparatus is considered as follows. Carbonic acid (CO 2 ) of the water to be treated is converted into bicarbonate ion (CO 2 + OH − → HCO 3 − ) by an ionization reaction with hydroxide ion (OH − ) in the electric deionization apparatus.
【００２２】この重炭酸イオンが脱塩室内を移動し、ア
ニオン交換膜を通過して濃縮室へ移動する。従って、第
一にイオン化反応を促進させること、第二に重炭酸イオ
ンの移動度を改善することが炭酸除去によって重要であ
る。This bicarbonate ion moves in the desalting chamber, passes through the anion exchange membrane, and moves to the concentrating chamber. Therefore, it is important to remove carbonic acid firstly to promote the ionization reaction and secondly to improve the mobility of bicarbonate ion.
【００２３】この炭酸のイオン化反応（重炭酸イオンの
生成）促進のためには、ＯＨ−イオンの供給が必要であ
り、これは水解離（Ｈ２Ｏ→Ｈ＋＋ＯＨ−）によっても
たらされる。In order to accelerate the ionization reaction of carbonic acid (production of bicarbonate ion), it is necessary to supply OH − ions, which is brought about by water dissociation (H 2 O → H + + OH − ).
【００２４】この水解離が発生する場所はイオン交換樹
脂同士の間およびイオン交換樹脂とイオン交換膜同士の
間である。このうち、イオン交換樹脂同士の間で発生し
た水素イオンおよび水酸化物イオンは脱塩室内で再び会
合するのでその寿命は短い。それ故に、炭酸のイオン化
のためのＯＨ−としては、イオン交換膜とイオン交換樹
脂との間、特にカチオン交換膜とアニオン交換樹脂との
間で発生するＯＨ−イオンが有効である。従って、例え
ばアニオン交換樹脂の割合を６０％から７０％に高める
と、カチオン交換膜へのアニオン樹脂の接触率が約１７
％上昇し、これに伴い、発生するＯＨ−イオン量も増加
する。この結果、炭酸のイオン化反応が促進される。な
お、アニオン交換樹脂の割合を８０％に高めると、ＯＨ
−イオン発生量はさらに増加するが、Ｈ＋イオンが減少
しすぎるためＮａ＋イオンの除去性が低下し、処理水の
比抵抗を悪くする。The places where this water dissociation occurs are between the ion exchange resins and between the ion exchange resin and the ion exchange membranes. Of these, hydrogen ions and hydroxide ions generated between the ion exchange resins are re-associated in the desalting chamber, so that their life is short. Therefore, as OH − for the ionization of carbonic acid, OH − ions generated between the ion exchange membrane and the ion exchange resin, particularly between the cation exchange membrane and the anion exchange resin are effective. Therefore, for example, if the ratio of the anion exchange resin is increased from 60% to 70%, the contact ratio of the anion resin to the cation exchange membrane is about 17%.
%, And the amount of generated OH − ions also increases. As a result, the ionization reaction of carbonic acid is promoted. If the ratio of the anion exchange resin is increased to 80%, OH
- ion generation amount further increases, removal of the Na + ions is decreased because the H + ions is too reduced, deteriorating the resistivity of the treated water.
【００２５】このイオン化した重炭酸イオンは速やかに
濃縮室へ移動させる必要がある。アニオン交換樹脂の割
合を６０％から７０％へ上げると、アニオン交換樹脂を
介して移動する割合が約３倍に増える。この結果、重炭
酸イオンの移動度改善により炭酸の除去性が向上する。
しかしながら、カチオン交換樹脂の割合が減少するた
め、Ｎａ＋リークを招き、比抵抗を悪くする。This ionized bicarbonate ion must be promptly moved to the concentration chamber. Increasing the proportion of anion exchange resin from 60% to 70% increases the rate of migration through the anion exchange resin by a factor of about 3. As a result, the mobility of carbonic acid ions is improved, and thus the carbonic acid removing property is improved.
However, since the ratio of the cation exchange resin is reduced, Na + leak is caused and the specific resistance is deteriorated.
【００２６】このようにアニオンの除去性を改善するこ
とは、カチオンの除去性を悪くすることと表裏一体であ
る。従って、通常のリブ式の電気脱イオン装置では、本
発明の様なアニオン交換樹脂比では、もはやカチオンの
除去性が悪く、Ｎａ＋リークが発生してしまう。そこ
で、本発明では、電気式脱イオン装置として脱イオン特
性に優れた特開２００１−２５６４７号の電気式脱イオ
ン装置の構造を採用する。Improving the removability of anions in this way is inextricably linked with deteriorating the removability of cations. Therefore, in the usual rib type electric deionization apparatus, with the anion exchange resin ratio as in the present invention, the cation removability is no longer good, and Na + leak occurs. Therefore, in the present invention, as the electric deionization device, the structure of the electric deionization device of Japanese Patent Laid-Open No. 2001-25647, which is excellent in deionization characteristics, is adopted.
【００２７】[0027]
【発明の実施の形態】以下、図面を参照して実施の形態
について説明する。図１は実施の形態に係る脱塩室の構
成を示す分解斜視図、図２は区画部材の要部斜視図、図
３は区画部材の分解斜視図、図４は区画部材の通水状況
を示す正面図である。DETAILED DESCRIPTION OF THE INVENTION Embodiments will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing a configuration of a desalination chamber according to an embodiment, FIG. 2 is a perspective view of a main part of a partition member, FIG. 3 is an exploded perspective view of the partition member, and FIG. It is a front view shown.
【００２８】この脱塩室は、長方形状のフレーム２０
と、このフレーム２０内に配置された好ましくは導電性
を有した区画部材２１と、区画部材２１によって形成さ
れた小室２２内に充填されたイオン交換樹脂２３と、フ
レーム２０を挟むように配置されたアニオン交換膜２４
及びカチオン交換膜２５とによって構成されている。This demineralizing chamber has a rectangular frame 20.
A partition member 21 having a conductivity, which is preferably arranged in the frame 20, an ion exchange resin 23 filled in a small chamber 22 formed by the partition member 21, and arranged so as to sandwich the frame 20. Anion exchange membrane 24
And the cation exchange membrane 25.
【００２９】フレーム２０の上部には被処理水（原水）
の導入用の通水孔２６及び濃縮水（流入側）の通水孔２
７が穿孔され、下部には脱塩水の通水孔２８及び濃縮水
（排出側）の通水孔２９が穿孔されている。この原水導
入用通水孔２６及び脱塩水の通水孔２８は切欠状の水路
２６ａ，２８ａを介してそれぞれフレーム２０の内側に
連通している。Water to be treated (raw water) is provided above the frame 20.
Water hole 26 for introducing water and water hole 2 for concentrated water (inflow side)
7 is perforated, and a water passage hole 28 for demineralized water and a water passage hole 29 for concentrated water (discharging side) are perforated in the lower portion. The raw water introduction water passage 26 and the demineralized water passage hole 28 communicate with the inside of the frame 20 via notched water passages 26a and 28a, respectively.
【００３０】なお、水路２６ａは、図１では左上の小室
にのみ連通するように図示しているが、左右方向の各小
室に原水が均等に分配されるように水路２６ａは実際に
はフレーム２０の上部に複数設けられ、通水孔２６は最
上部の各小室に直接に連通している。同様に、図１では
水路２８ａは右下の小室にのみ連通するように図示して
あるが、実際には水路２８ａはフレーム２０の下部に複
数個設けられており、通水孔２８は最下部の各小室に直
接に連通している。Although the water channel 26a is shown in FIG. 1 so as to communicate only with the upper left small chamber, the water channel 26a is actually the frame 20 so that the raw water is evenly distributed to the left and right small chambers. A plurality of water passage holes 26 are directly provided to the uppermost small chambers. Similarly, in FIG. 1, the water channel 28a is illustrated so as to communicate only with the small chamber at the lower right, but in reality, a plurality of water channels 28a are provided in the lower portion of the frame 20, and the water passage hole 28 is at the bottom. It directly communicates with each small room.
【００３１】この実施の形態に係る区画部材２１は六角
形のハニカム形状のものであり、小室２２は上下左右に
多数配置されている。各小室２２の１対の側辺がフレー
ム２０の長手方向即ち上下方向となるように配置されて
いる。The partition member 21 according to this embodiment has a hexagonal honeycomb shape, and a large number of small chambers 22 are arranged vertically and horizontally. A pair of sides of each small chamber 22 is arranged in the longitudinal direction of the frame 20, that is, in the vertical direction.
【００３２】この区画部材２１は、予め一体成形された
ものであってもよく、複数の部材を組み合わせたもので
あってもよい。例えば図３のようにジグザグ状の屈曲板
３０の長手方向面３１同士を連結することにより構成さ
れる。この屈曲板３０は、長手方向面３１に対し１２０
゜の角度で連なる通水性の斜向面３２，３３を備えてい
る。長手方向面３１同士を連結するには例えば接着剤を
用いることができる。この屈曲板３０は、水は通過させ
るがイオン交換樹脂は通過させない材料、例えば織布、
不織布、メッシュ、多孔質材などにより構成されてい
る。この屈曲板３０は耐酸性及び耐アルカリ性を有した
合成樹脂又は金属により剛性を有するように形成される
のが好ましい。長手方向面３１は通水性を有していても
よく、有していなくてもよい。The partition member 21 may be integrally formed in advance or may be a combination of a plurality of members. For example, as shown in FIG. 3, it is configured by connecting longitudinal surfaces 31 of zigzag bent plates 30. The bending plate 30 has a length of 120 relative to the longitudinal surface 31.
It is provided with water-permeable inclined surfaces 32 and 33 which are continuous at an angle of °. An adhesive, for example, can be used to connect the longitudinal surfaces 31 to each other. The bending plate 30 is made of a material that allows water to pass through but does not allow an ion exchange resin to pass through, such as a woven fabric.
It is made of non-woven fabric, mesh, porous material, etc. The bent plate 30 is preferably made of a synthetic resin or metal having acid resistance and alkali resistance so as to have rigidity. The longitudinal surface 31 may or may not have water permeability.
【００３３】区画部材２１はフレーム２０に嵌め込まれ
てもよい。また、フレーム２０の片面側に透水性シート
又はメッシュを張設し、これに区画部材を接着してもよ
い。The partition member 21 may be fitted into the frame 20. Alternatively, a water-permeable sheet or mesh may be stretched on one side of the frame 20, and the partition member may be adhered thereto.
【００３４】この脱塩室を有した電気式脱イオン装置の
全体構造それ自体は前記図６と同じであり、原水、濃縮
水及び電極水の通水系路も同じである。The entire structure itself of the electric deionization apparatus having the deionization chamber is the same as that shown in FIG. 6, and the water passages for raw water, concentrated water and electrode water are also the same.
【００３５】この電気式脱イオン装置に通水して脱塩運
転を行う場合、脱塩室に流入した原水は、図４の通り小
室２２を囲む区画部材２１を通過して隣接する小室２２
に流れ込み、徐々に下方に流れ、この間に脱イオン処理
を受ける。そして、遂には脱塩室の下部に達し、水路２
８ａを介して脱塩水取出用の孔２８に流入し、脱塩水と
して電気式脱イオン装置外に取り出される。When the desalination operation is performed by passing water through this electric deionization apparatus, the raw water flowing into the desalination chamber passes through the partition member 21 surrounding the small chamber 22 as shown in FIG.
And gradually flows downward, during which it is subjected to deionization. Finally, it reached the bottom of the desalination chamber, and the waterway 2
It flows into the hole 28 for taking out demineralized water via 8a, and is taken out of the electric deionization device as demineralized water.
【００３６】この脱塩室における平均的な水の流れ方向
は、原水流入用の水路２６ａがフレーム２０の上部に存
在し、脱塩水取出用の水路２８ａがフレーム２０の下部
に存在するところから、上から下に向う鉛直方向となっ
ている。この平均的な水の流れ方向に対し小室の上部及
び下部が傾斜しているので、被処理水は１つの小室２２
から左及び右側の小室２２へ斜めに分かれて流下するよ
うになる。このため、被処理水が各小室２２にほぼ均等
に分散して流れるようになり、被処理水とイオン交換樹
脂との接触効率が良好なものとなる。The average flow direction of water in this desalination chamber is that a water channel 26a for inflowing raw water exists at the upper part of the frame 20 and a water channel 28a for taking out demineralized water exists at the lower part of the frame 20, The vertical direction is from top to bottom. Since the upper and lower parts of the small chamber are inclined with respect to this average water flow direction, the water to be treated is contained in one small chamber 22.
To the small chambers 22 on the left and the right side, the flow is divided diagonally. For this reason, the water to be treated is distributed in each of the small chambers 22 almost evenly, and the contact efficiency between the water to be treated and the ion exchange resin is improved.
【００３７】この脱塩室にあっては、小室２２が比較的
小さく、イオン交換樹脂の自重及び水圧によって各小室
２２内においてイオン交換樹脂に対し加えられる下向き
の圧力が小さい。従って、いずれの小室２２内において
もイオン交換樹脂が圧縮されることがなく、イオン交換
樹脂が小室内の下部において局部的に圧密化されること
がない。In this desalting chamber, the small chamber 22 is relatively small, and the downward pressure applied to the ion exchange resin in each small chamber 22 is small due to its own weight and water pressure. Therefore, the ion exchange resin is not compressed in any of the small chambers 22, and the ion exchange resin is not locally compacted in the lower portion of the small chamber.
【００３８】各小室２２に対して充填されるイオン交換
樹脂は、アニオン交換樹脂とカチオン交換樹脂との混合
物である。両者の混合割合は、アニオン交換樹脂とカチ
オン交換樹脂との合量に対するアニオン交換樹脂の割合
が６０〜８０体積％となる範囲である。The ion exchange resin filled in each small chamber 22 is a mixture of anion exchange resin and cation exchange resin. The mixing ratio of both is such that the ratio of the anion exchange resin to the total amount of the anion exchange resin and the cation exchange resin is 60 to 80% by volume.
【００３９】アニオン交換樹脂の割合が６０体積％より
も少ないと、水の解離によるＯＨ−生成量が不足し、炭
酸の重炭酸イオンへのイオン化が不足し、炭酸除去効果
が低くなる。一方、アニオン交換樹脂の割合が８０体積
％よりも多くなると、Ｎａ＋イオン等のカチオンの除去
効率が悪くなり、処理水中のＮａ＋イオン等の濃度が高
くなる。アニオン交換樹脂が６０〜８０体積％好ましく
は６５〜７５体積％の範囲であると、炭酸及びＮａ＋イ
オン等の除去がいずれも十分に行われると共に、弱酸で
あるシリカのイオン化も促進され、シリカ除去率も高く
なる。When the proportion of the anion exchange resin is less than 60% by volume, the amount of OH − produced by the dissociation of water is insufficient, the ionization of carbonic acid into bicarbonate ion is insufficient, and the effect of removing carbonic acid is lowered. On the other hand, when the proportion of the anion exchange resin is more than 80% by volume, the efficiency of removing cations such as Na + ions is deteriorated and the concentration of Na + ions and the like in the treated water is increased. When the amount of the anion exchange resin is in the range of 60 to 80% by volume, preferably 65 to 75% by volume, the removal of carbonic acid, Na + ions and the like is sufficiently performed, and the ionization of silica, which is a weak acid, is promoted, resulting in silica. The removal rate is also high.
【００４０】本発明によると、炭酸濃度が１０ｍｇＣＯ
２／Ｌ以上の被処理水からも、１０ＭΩ・ｃｍ以上の高
比抵抗の処理水を生産することが可能である。According to the present invention, the carbonic acid concentration is 10 mg CO
It is possible to produce treated water having a high specific resistance of 10 MΩ · cm or more from treated water of 2 / L or more.
【００４１】なお、小室２２に充填されるイオン交換樹
脂は、アニオン交換樹脂とカチオン交換樹脂のみである
ことが好ましいが、少量のII型のアニオン交換樹脂が混
合されてもよい。II型のアニオン交換樹脂の混合割合
は、アニオン交換樹脂全体の１０体積％以下であること
が望ましい。The ion exchange resin filled in the small chamber 22 is preferably only an anion exchange resin and a cation exchange resin, but a small amount of type II anion exchange resin may be mixed. The mixing ratio of the II type anion exchange resin is preferably 10% by volume or less of the whole anion exchange resin.
【００４２】図１〜４では小室は六角形であるが、四角
形例えば菱形であってもよい。また、区画部材は、三角
形の小室を形成する三角格子状区画部材であってもよ
く、さらに別形状の小室を有する区画部材であってもよ
い。Although the small chamber is hexagonal in FIGS. 1 to 4, it may be square, for example, rhombic. Further, the partition member may be a triangular lattice partition member forming a triangular small chamber, or may be a partition member having a small chamber of another shape.
【００４３】本発明の電気式脱イオン装置において、小
室のイオン交換膜面への投影面積は１〜１００ｃｍ２と
くに５〜８０ｃｍ２とりわけ１０〜５０ｃｍ２程度が好
ましい。脱塩室を挟む１対のアニオン交換膜とカチオン
交換膜の間隔、即ち脱塩室の厚みは１．５〜１５ｍｍと
くに３〜１０ｍｍ程度が好ましい。なお、小室を小さく
するほど１つの小室に充填するイオン交換樹脂の量が少
なくなり、イオン交換樹脂の流動が抑制されると共に、
区画部材及び脱塩室の強度も大きくなるが、脱塩室の通
水圧損が大きくなる。[0043] In electrodeionization apparatus of the present invention, the projected area to the ion exchange membrane surface of the chamber is 1 to 100 cm 2, especially 5～80Cm 2 especially 10 to 50 cm 2 is preferably about. The distance between the pair of anion exchange membrane and cation exchange membrane that sandwich the desalting chamber, that is, the thickness of the desalting chamber is preferably 1.5 to 15 mm, particularly 3 to 10 mm. In addition, the smaller the small chamber, the smaller the amount of the ion exchange resin filled in one small chamber, and the flow of the ion exchange resin is suppressed.
Although the strength of the partition member and the desalting chamber also increases, the water pressure loss in the desalting chamber increases.
【００４４】濃縮室の厚みは０．３〜１ｍｍ程度が好ま
しい。濃縮室内には２０〜６０メッシュ程度のスペーサ
が配置されるのが望ましい。The thickness of the concentrating chamber is preferably about 0.3 to 1 mm. It is desirable to arrange spacers of about 20 to 60 mesh in the concentration chamber.
【００４５】イオン交換樹脂の粒径は、０．１〜１ｍｍ
とくに０．２〜０．６ｍｍ程度が好ましい。このイオン
交換樹脂は、小室の容積の１００〜１４０％程度の量を
小室に収容した後、イオン交換膜で両側から挟みつけ、
イオン交換樹脂を小室内に緻密に充填するのが好まし
い。The particle size of the ion exchange resin is 0.1 to 1 mm.
In particular, it is preferably about 0.2 to 0.6 mm. This ion exchange resin, after accommodating an amount of about 100 to 140% of the volume of the small chamber in the small chamber, is sandwiched by ion exchange membranes from both sides,
It is preferable that the ion exchange resin is packed in the small chamber densely.
【００４６】小室内にイオン交換樹脂を充填して電気式
脱イオン装置を組み立てる場合、小室内にイオン交換樹
脂を充填し、両端に相対するイオン交換膜を設置後、原
水を供給し内部イオン交換樹脂を膨潤させた後、小室を
体積比が１００〜１０２％程度になるように締め付けて
もよい。When assembling an electric deionization apparatus by filling a small chamber with an ion exchange resin, the small chamber is filled with an ion exchange resin, and ion-exchange membranes facing both ends are installed, and then raw water is supplied to perform internal ion exchange. After swelling the resin, the small chamber may be tightened so that the volume ratio is about 100 to 102%.
【００４７】また、濃縮室内にもイオン交換樹脂を充填
することができる。濃縮室にイオン交換樹脂を充填する
ことにより、電流が流れ易く、また、乱流効果も改善さ
れ、電流効率が向上する。濃縮室に配置されるスペーサ
の代わりに脱塩室と同様に区画部材で多数の小室を形成
し、各小室にイオン交換樹脂を充填しても良い。Further, the concentration chamber can be filled with an ion exchange resin. By filling the concentrating chamber with the ion exchange resin, the current easily flows, the turbulence effect is also improved, and the current efficiency is improved. Instead of the spacers arranged in the concentrating chamber, a large number of small chambers may be formed by partition members as in the desalting chamber, and each small chamber may be filled with an ion exchange resin.
【００４８】なお、一般に、陰極室はアルカリ性を呈す
るため、通常陽極室を通過した酸性の陽極水が供給さ
れ、陰極室で中和し、一部純水になる。このため、陰極
室の導電性は低下し局部的に電圧が上昇し、スケールが
発生し易い。この状況を避けるため、陰極をメッシュ電
極又は不織布状の電極を単独又は組み合わせた電極を使
用することにより電極面積を増やし、電極面の電流密度
を下げることによりスケールの発生を防止するのが好ま
しい。Since the cathode chamber is generally alkaline, acidic anode water that has normally passed through the anode chamber is supplied and neutralized in the cathode chamber to partially become pure water. Therefore, the conductivity of the cathode chamber is lowered, the voltage is locally increased, and scale is likely to occur. In order to avoid this situation, it is preferable to prevent the generation of scale by increasing the electrode area by using a mesh electrode or a non-woven fabric electrode alone or in combination as the cathode and decreasing the current density on the electrode surface.
【００４９】本発明の電気式脱イオン装置を運転する場
合、濃縮水を循環し、循環水中のイオン濃度を給水の５
〜４０倍の範囲内に制御することが望ましい。この場
合、濃縮水のスケール成分である硬度成分を電気的に分
離排除し、循環水中のランゲリアインデックスをマイナ
スにすることが好ましい。硬度成分除去に弱酸性イオン
交換樹脂を使用してもよい。When the electric deionization apparatus of the present invention is operated, the concentrated water is circulated so that the ion concentration in the circulating water is 5
It is desirable to control within a range of up to 40 times. In this case, it is preferable to electrically separate and eliminate the hardness component, which is a scale component of the concentrated water, to make the Langeria index in the circulating water negative. A weakly acidic ion exchange resin may be used to remove the hardness component.
【００５０】[0050]
【実施例】以下、実施例１〜３及び比較例１，２につい
て説明する。EXAMPLES Examples 1 to 3 and Comparative Examples 1 and 2 will be described below.
【００５１】この実施例及び比較例で用いた電気式脱イ
オン装置は、図１〜４に示す構造の脱塩室を有し、濃縮
室については上下方向に３本のリブを延設した構造のも
のである。The electric deionization apparatus used in this example and the comparative example has a deionization chamber having the structure shown in FIGS. 1 to 4, and the concentration chamber has a structure in which three ribs are vertically extended. belongs to.
【００５２】脱塩室及び濃縮室の大きさは幅１３０ｍ
ｍ、高さ４００ｍｍであり、脱塩室の厚みは５ｍｍ、濃
縮室の厚みは２．５ｍｍである。The desalination chamber and the concentration chamber are 130 m wide.
m, the height is 400 mm, the thickness of the desalting chamber is 5 mm, and the thickness of the concentrating chamber is 2.5 mm.
【００５３】脱塩室の数は３、濃縮室の数は４であり、
両者は図６の如く交互に配設されている。最も外側の濃
縮室の両側（外側）に図６と同様に電極室が配置されて
いる。The number of desalting chambers is 3, and the number of concentrating chambers is 4,
Both are alternately arranged as shown in FIG. Electrode chambers are arranged on both sides (outside) of the outermost concentrating chamber as in FIG.
【００５４】脱塩室内の小室は、図示の通り正六角形で
あり、六角形の一辺の長さは１６．１ｍｍである。小室
を形成する区画部材の材質は縦の壁部がポリプロピレ
ン、斜めのメッシュ部がポリエステル製である。The small chamber in the desalting chamber is a regular hexagon as shown, and the length of one side of the hexagon is 16.1 mm. The material of the partition member forming the small chamber is polypropylene for the vertical wall portion and polyester for the diagonal mesh portion.
【００５５】脱塩室の各小室には、それぞれアニオン交
換樹脂とカチオン交換樹脂との混合物を充填した。両樹
脂の含量に対するアニオン交換樹脂の割合は次の通りで
ある。
比較例１ ５０％
実施例１ ６５％
実施例２ ７０％
実施例３ ７５％
比較例２ ９０％Each small chamber of the desalting chamber was filled with a mixture of anion exchange resin and cation exchange resin. The ratio of the anion exchange resin to the content of both resins is as follows. Comparative Example 1 50% Example 1 65% Example 2 70% Example 3 75% Comparative Example 2 90%
【００５６】濃縮室にはカチオン交換樹脂とアニオン交
換樹脂とを４：６の体積比で混合したものを充填し、電
極室には活性炭を充填した。The concentration chamber was filled with a mixture of a cation exchange resin and an anion exchange resin in a volume ratio of 4: 6, and the electrode chamber was filled with activated carbon.
【００５７】その他の運転条件は次の通りである。
被処理水 ：市水を逆浸透膜分離処理した炭酸濃度１
８ｍｇＣＯ２／Ｌ、シリカ濃度０．３５ｍｇＳｉＯ２／
Ｌ、導電率１０μＳ／ｃｍの水。
脱塩室通水量：１９０Ｌ／ｈ
濃縮室通水量： ６０Ｌ／ｈ
電圧 ：４０Ｖ
電流 ：４．４Ａ
電流効率 ：２０％Other operating conditions are as follows. Water to be treated: Concentration of carbon dioxide obtained by subjecting city water to reverse osmosis membrane separation 1
8 mg CO 2 / L, silica concentration 0.35 mg SiO 2 /
L, water having an electric conductivity of 10 μS / cm. Desalination room water flow: 190L / h Concentration room water flow: 60L / h Voltage: 40V Current: 4.4A Current efficiency: 20%
【００５８】得られた処理水の水質を表１に示すと共
に、電気式脱イオン装置からのＣＯ２及びＮａ＋のイオ
ンリーク量の測定結果を図５に示す。表１及び図５の通
り、アニオン交換樹脂の割合を６０〜８０％とすること
により、炭酸及びＮａ＋イオンがいずれも十分に除去さ
れる。The water quality of the obtained treated water is shown in Table 1, and the measurement results of the amount of CO 2 and Na + ion leak from the electric deionization apparatus are shown in FIG. As shown in Table 1 and FIG. 5, by setting the ratio of the anion exchange resin to 60 to 80%, both carbonic acid and Na + ions are sufficiently removed.
【００５９】[0059]
【表１】 [Table 1]
【００６０】[0060]
【発明の効果】上記実施例及び比較例からも明らかな通
り、本発明によると炭酸濃度の高い被処理水であっても
十分に比抵抗の高い処理水を生産することができる。本
発明によると、シリカも十分に除去することができる。As is apparent from the above Examples and Comparative Examples, according to the present invention, it is possible to produce treated water having a sufficiently high specific resistance even if the treated water has a high carbonic acid concentration. According to the present invention, silica can be sufficiently removed.
【図１】実施の形態に係る脱塩室の構成を示す分解斜視
図である。FIG. 1 is an exploded perspective view showing a configuration of a desalination chamber according to an embodiment.
【図２】区画部材の要部斜視図である。FIG. 2 is a perspective view of a main part of a partition member.
【図３】区画部材の分解斜視図である。FIG. 3 is an exploded perspective view of a partition member.
【図４】区画部材の通水状況を示す正面図である。FIG. 4 is a front view showing a water flow state of a partition member.
【図５】イオンリーク量（ｐｐｂ）とアニオン交換樹脂
の比率（％）との関係を示すグラフである。FIG. 5 is a graph showing the relationship between the amount of ion leak (ppb) and the ratio (%) of anion exchange resin.
【図６】電気式脱イオン装置の一般的な構成を示す分解
斜視図である。FIG. 6 is an exploded perspective view showing a general configuration of an electric deionization apparatus.
２０ フレーム ２１ 区画部材 ２２ 小室 ２３ イオン交換樹脂 ２４ アニオン交換膜 ２５ カチオン交換膜 20 frames 21 partition members 22 Komuro 23 Ion exchange resin 24 Anion exchange membrane 25 Cation exchange membrane
フロントページの続き Ｆターム(参考） 4D006 GA17 HA47 JA08A JA29A JA29B JA29C JA30Z JA41A JA42A JA42B JA42C JA43A JA43B JA43C JA44A JA44B MA03 MA13 MA14 MB07 MC73 MC73X MC77 MC77X PA01 PB02 PB23 PB28 PC02 4D061 DA01 DB13 EA09 EB01 EB04 EB13 EB19 FA08 Continued front page F-term (reference) 4D006 GA17 HA47 JA08A JA29A JA29B JA29C JA30Z JA41A JA42A JA42B JA42C JA43A JA43B JA43C JA44A JA44B MA03 MA13 MA14 MB07 MC73 MC73X MC77 MC77X PA01 PB02 PB23 PB28 PC02 4D061 DA01 DB13 EA09 EB01 EB04 EB13 EB19 FA08
Claims (2)
アニオン交換膜とを交互に配列して脱塩室と濃縮室とを
交互に形成し、脱塩室にイオン交換樹脂を充填し、脱塩
室に被処理水を通水し、濃縮室に濃縮水を通水するよう
にした電気式脱イオン装置であって、 該脱塩室内に区画部材が配置され、該区画部材と該カチ
オン交換膜及びアニオン交換膜とによって囲まれた多数
の小室が該脱塩室内に形成されており、 各小室にそれぞれイオン交換樹脂が充填されており、 各小室に臨む区画部材の少なくとも一部は該脱塩室内の
平均的な水の流れ方向に対し傾斜しており、 該区画部材の少なくとも傾斜した部分は、水を通過させ
るがイオン交換樹脂の通過を阻止する構造となっている
電気式脱イオン装置において、 該イオン交換樹脂は、アニオン交換樹脂とカチオン交換
樹脂とを含む混合物であり、該アニオン交換樹脂とカチ
オン交換樹脂との合量に対するアニオン交換樹脂の割合
が６０〜８０体積％であることを特徴とする電気式脱イ
オン装置。1. A desalting chamber and a concentrating chamber are alternately formed by alternately arranging a plurality of cation exchange membranes and anion exchange membranes between electrodes, and the desalting chamber is filled with an ion exchange resin, What is claimed is: 1. An electric deionization device, wherein water to be treated is passed through a desalting chamber and concentrated water is passed through a concentrating chamber, wherein a partition member is disposed in the demineralizing chamber, the partition member and the cation. A large number of small chambers surrounded by an exchange membrane and an anion exchange membrane are formed in the desalination chamber, each small chamber is filled with an ion exchange resin, and at least a part of the partition member facing each small chamber is Electrical deionization that is inclined with respect to the average flow direction of water in the deionization chamber, and at least the inclined portion of the partition member has a structure that allows water to pass therethrough but prevents ion exchange resin from passing therethrough. In the apparatus, the ion exchange resin is an anion. Conversion is a resin with a mixture containing a cation exchange resin, electrodeionization device, wherein the ratio of the anion exchange resin to the total amount of the anion exchange resin and the cation exchange resin is 60 to 80 vol%.
上の被処理水を請求項１に記載の電気脱イオン装置を用
いて脱イオン処理することを特徴とする電気脱イオン方
法。2. An electric deionization method, which comprises subjecting water to be treated having a carbonic acid concentration of 10 mgCO 2 / L or more to deionization using the electric deionization apparatus according to claim 1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001325285A JP3985494B2 (en) | 2001-10-23 | 2001-10-23 | Electric deionization apparatus and deionization method |
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| JP2003126862A true JP2003126862A (en) | 2003-05-07 |
| JP3985494B2 JP3985494B2 (en) | 2007-10-03 |
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|---|---|---|---|
| JP2001325285A Expired - Fee Related JP3985494B2 (en) | 2001-10-23 | 2001-10-23 | Electric deionization apparatus and deionization method |
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Cited By (5)
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| WO2004002898A1 (en) * | 2002-07-01 | 2004-01-08 | Kurita Water Industries Ltd. | Electric deionizer |
| WO2005066079A1 (en) * | 2004-01-09 | 2005-07-21 | Kurita Water Industries Ltd. | Electric deionization device and electric deionization method |
| JP2009536094A (en) * | 2006-05-09 | 2009-10-08 | ユーロディア アンデュストリ エス アー | Exchange membrane device with at least two compartments, in particular an electrodialysis device |
| JP7374400B1 (en) | 2022-05-25 | 2023-11-06 | オルガノ株式会社 | Electrodeionized water production equipment and pure water production method |
| WO2023228606A1 (en) * | 2022-05-25 | 2023-11-30 | オルガノ株式会社 | Apparatus for producing electrodeionized water, and method for producing pure water |
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| WO2023228606A1 (en) * | 2022-05-25 | 2023-11-30 | オルガノ株式会社 | Apparatus for producing electrodeionized water, and method for producing pure water |
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