JP2001198576A - Electric deionizing device - Google Patents
Electric deionizing deviceInfo
- Publication number
- JP2001198576A JP2001198576A JP2000008075A JP2000008075A JP2001198576A JP 2001198576 A JP2001198576 A JP 2001198576A JP 2000008075 A JP2000008075 A JP 2000008075A JP 2000008075 A JP2000008075 A JP 2000008075A JP 2001198576 A JP2001198576 A JP 2001198576A
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- Japan
- Prior art keywords
- water
- chamber
- exchange membrane
- flows
- exchange membranes
- 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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- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は水を脱イオン処理す
るための電気式脱イオン装置に係り、特にアニオン交換
膜及びカチオン交換膜をスパイラル状に巻回した巻回体
を有するスパイラル型の電気式脱イオン装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric deionization apparatus for deionizing water, and more particularly to a spiral-type electric deionization apparatus having a spirally wound body of an anion exchange membrane and a cation exchange membrane. The present invention relates to a deionization apparatus.
【０００２】[0002]
【従来の技術】半導体や液晶の製造工程で用いられる脱
イオン水の製造、あるいは製薬、食品等の分野で電気式
脱イオン装置が広く用いられている。2. Description of the Related Art Electric deionizers are widely used in the fields of producing deionized water used in the production process of semiconductors and liquid crystals, pharmaceuticals, foods, and the like.
【０００３】この電気式脱イオン装置として、アニオン
交換膜及びカチオン交換膜の積層シートをスパイラル状
に巻回した巻回体を有するスパイラル型電気式脱イオン
装置が公知である（例えば特開平６−７６４５号）。こ
のスパイラル型電気式脱イオン装置にあっては、図９の
ようにアニオン交換膜１とカチオン交換膜２とが巻回体
の径方向に交互に配列され、この交換膜によって隔てら
れた濃縮室６と希釈室５とが該径方向に配置される。As this electric deionization apparatus, a spiral electric deionization apparatus having a wound body in which a laminated sheet of an anion exchange membrane and a cation exchange membrane is wound in a spiral shape is known (for example, Japanese Patent Laid-Open Publication No. Hei 6-1994). No. 7645). In this spiral-type electric deionization apparatus, as shown in FIG. 9, an anion exchange membrane 1 and a cation exchange membrane 2 are alternately arranged in the radial direction of a roll, and a concentration chamber separated by the exchange membrane. 6 and the dilution chamber 5 are arranged in the radial direction.
【０００４】この巻回体は、１対のアニオン交換膜１と
カチオン交換膜２とをそれらの間にイオン交換樹脂等の
イオン交換体３を介在させて積層してなるリーフと称さ
れる積層シート４をスペーサ７と共に中心電極の外周に
スパイラル状に巻回したものである。[0004] This wound body is a laminate called a leaf formed by laminating a pair of an anion exchange membrane 1 and a cation exchange membrane 2 with an ion exchanger 3 such as an ion exchange resin interposed therebetween. The sheet 4 is spirally wound around the outer periphery of the center electrode together with the spacer 7.
【０００５】通常の場合、中心電極を陽極とし、外側電
極を陰極とし、原水を巻回体の最外周側から希釈室５と
濃縮室６との間に導入する。この原水は、各室５，６を
スパイラル状に求心方向に流れ、この間に透析作用を受
ける。In a normal case, raw water is introduced between the diluting chamber 5 and the concentrating chamber 6 from the outermost peripheral side of the wound body, with the central electrode as the anode and the outer electrode as the cathode. The raw water flows in the chambers 5 and 6 in a spiral manner in the centripetal direction, and is subjected to a dialysis action during this time.
【０００６】希釈室の中心側にはアニオン交換膜１が配
置され、外周側にはカチオン交換膜２が配置されている
ので、希釈室を流れる間に原水中のアニオンはアニオン
交換膜１を透過して中心側に隣接する濃縮室６に移行
し、カチオンはカチオン交換膜２を透過して外周側に隣
接する濃縮室６に移行する。これにより、希釈室の巻回
体中心側の末端から脱イオン水（希釈水）が取り出さ
れ、濃縮室の中心側の末端から濃縮水が取り出される。
また、Ｈ＋イオン及びＯＨ−イオンが生成し、これによ
りイオン交換体が連続的に再生される。An anion exchange membrane 1 is arranged at the center of the dilution chamber, and a cation exchange membrane 2 is arranged at the outer periphery, so that anions in raw water permeate the anion exchange membrane 1 while flowing through the dilution chamber. Then, the cations pass through the cation exchange membrane 2 and move to the concentrating chamber 6 adjacent to the outer periphery. As a result, deionized water (dilution water) is taken out from the end of the dilution chamber near the center of the wound body, and concentrated water is taken out from the center end of the concentration chamber.
In addition, H + ions and OH − ions are generated, whereby the ion exchanger is continuously regenerated.
【０００７】このスパイラル型電気式脱イオン装置で
は、電流線が放射線状に広がるので、中心電極に近づく
ほど電流密度が高くなり、樹脂の再生効率が高くなる。
また、この最も中心電極側の電流密度の高い部分で炭
酸、シリカなどの弱電解質イオンが除去される結果、高
い処理水質が得られる。In this spiral-type electric deionization apparatus, since the current line spreads radially, the current density becomes higher as it approaches the center electrode, and the resin regeneration efficiency increases.
In addition, as a result of removing weak electrolyte ions such as carbonic acid and silica at the portion having the highest current density on the center electrode side, high treated water quality can be obtained.
【０００８】[0008]
【発明が解決しようとする課題】このスパイラル型電気
式脱イオン装置において単位時間当りの処理水量を高め
ようとして流速を大きくしたのでは処理水質が悪化す
る。流速を大きくしつつ処理水質を維持するためにスパ
イラル方向の流路長を大きくしたのでは、通水圧損が徒
に増大する。また、通水圧損を小さくするために交換膜
同士の間の間隔を大きくしたのではやはり処理水質が悪
化してしまう。In this spiral type electric deionization apparatus, if the flow rate is increased to increase the amount of treated water per unit time, the quality of treated water deteriorates. If the flow path length in the spiral direction is increased in order to maintain the quality of the treated water while increasing the flow velocity, the water pressure loss will increase unnecessarily. Further, if the interval between the exchange membranes is increased to reduce the water flow pressure loss, the quality of the treated water will also deteriorate.
【０００９】本発明は、処理水質を高く維持しながら処
理水量を増大させることができるスパイラル型電気式脱
イオン装置を提供することを第１の目的とする。It is a first object of the present invention to provide a spiral type electric deionization apparatus capable of increasing the amount of treated water while maintaining the quality of treated water high.
【００１０】また、このスパイラル型電気式脱イオン装
置は、上記の通り高い処理水質を得ることができるもの
であるが、濃縮室においてカルシウムなどのスケールが
一旦発生すると、分解組立が困難であるためモジュール
交換を余儀なくされる。[0010] Further, this spiral type electric deionization apparatus can obtain high treated water quality as described above. However, once scale such as calcium is generated in the concentration chamber, it is difficult to disassemble and assemble. The module must be replaced.
【００１１】スケールの発生機構は、濃縮水が巻回体の
外周側から中心側へ向ってスパイラル状に流れる過程
で、外周側で脱イオンされたカルシウムイオンと水のス
プリットにより内周側で脱イオンされた炭酸イオンが反
応して炭酸カルシウムスケールになると推定されてい
る。[0011] The mechanism for generating the scale is that, while the concentrated water flows spirally from the outer peripheral side to the center side of the wound body, calcium ions deionized on the outer peripheral side and water split on the inner peripheral side by splitting of water. It is estimated that the ionized carbonate ions react to form calcium carbonate scale.
【００１２】即ち、希釈室中に導入された原水中のカル
シウムイオンは巻回体の比較的外周側の部分でカチオン
交換膜を透過して濃縮室に移行する。一方、原水中の炭
酸塩成分は、解離度が低いので透析されにくく、巻回体
の中心に近い電流密度の高い部分に至って解離が進行
し、この中心電極近くにおいて炭酸イオンがアニオン交
換膜を透過して濃縮室に移行する。That is, the calcium ions in the raw water introduced into the dilution chamber permeate the cation exchange membrane at a relatively outer peripheral portion of the wound body and move to the concentration chamber. On the other hand, the carbonate component in the raw water has a low degree of dissociation, so it is difficult to be dialyzed, and dissociation proceeds to a portion where the current density is high near the center of the wound body, and carbonate ions form an anion exchange membrane near the center electrode. Permeate and move to the concentration chamber.
【００１３】このため、濃縮室内のうちでも中心電極に
近い領域でカルシウムイオン及び炭酸イオンの双方の濃
度が高いものとなり、炭酸カルシウムスケールが多量に
生じるようになる。Therefore, the concentration of both calcium ions and carbonate ions is high in the region near the center electrode in the concentration chamber, and a large amount of calcium carbonate scale is generated.
【００１４】本発明は、このような巻回体中心側での炭
酸カルシウムスケールの発生が防止されるスパイラル型
電気式脱イオン装置を提供することを第２の目的とす
る。A second object of the present invention is to provide a spiral-type electric deionization apparatus capable of preventing the generation of calcium carbonate scale on the center side of the wound body.
【００１５】[0015]
【課題を解決するための手段】本発明（請求項１）の電
気式脱イオン装置は、中心電極と、アニオン交換膜とカ
チオン交換膜との積層シートを該中心電極の外周にスパ
イラル状に巻回してなる巻回体と、該巻回体の外周に配
置された外側電極とを備えてなり、これらの電極の間
に、該交換膜によって隔てられた濃縮室と希釈室とが交
互に配列されている電気式脱イオン装置において、該積
層シートは、交互に積層配置された複数枚のアニオン交
換膜及びカチオン交換膜を有することを特徴とするもの
である。According to a first aspect of the present invention, there is provided an electric deionization apparatus in which a laminated sheet of a center electrode, an anion exchange membrane and a cation exchange membrane is spirally wound around the outer periphery of the center electrode. It comprises a spirally wound wound body, and an outer electrode disposed on the outer periphery of the wound body, and between these electrodes, a concentration chamber and a dilution chamber separated by the exchange membrane are alternately arranged. In the electric deionization apparatus described above, the laminated sheet has a plurality of anion exchange membranes and cation exchange membranes that are alternately laminated.
【００１６】かかる電気式脱イオン装置にあっては、ス
パイラル方向に複数の濃縮室及び希釈室が並列に複数対
（Ｎ対）配置されることになる。このため、スパイラル
方向の流路長及び交換膜同士の間隔は従来と同一とした
場合であっても同一の通水圧損でＮ倍の処理水量を得る
ことができる。この場合、処理水質は従来と同等の高い
水質が維持される。In such an electric deionization apparatus, a plurality of concentrating chambers and a plurality of diluting chambers are arranged in parallel (N pairs) in the spiral direction. For this reason, even if the flow path length in the spiral direction and the interval between the exchange membranes are the same as in the conventional case, it is possible to obtain N times the amount of treated water with the same water flow pressure loss. In this case, the treated water quality is maintained as high as the conventional one.
【００１７】本発明（請求項２）の電気式脱イオン装置
は、中心電極と、アニオン交換膜とカチオン交換膜との
積層シートを該中心電極の外周にスパイラル状に巻回し
てなる巻回体と、該巻回体の外周に配置された外側電極
とを備えてなり、これらの電極の間に、該交換膜によっ
て隔てられた濃縮室と希釈室とが交互に配列されている
電気式脱イオン装置において、該濃縮室及び希釈室の一
方における通水方向はスパイラル方向であり、他方にお
ける通水方向はスパイラル方向と交叉する方向であるこ
とを特徴とするものである。The electric deionization apparatus according to the present invention (claim 2) is a wound body formed by spirally winding a laminated sheet of a center electrode, an anion exchange membrane and a cation exchange membrane around the center electrode. And an outer electrode disposed on the outer periphery of the wound body, and an electric degasser in which a concentration chamber and a dilution chamber separated by the exchange membrane are alternately arranged between these electrodes. In the ion device, the water flow direction in one of the concentration chamber and the dilution chamber is a spiral direction, and the water flow direction in the other is a direction crossing the spiral direction.
【００１８】かかる電気式脱イオン装置にあっては、希
釈水と濃縮水の流れ方向が交叉方向であるため、カルシ
ウムイオン濃度が高められた濃縮水の通過領域が、水の
スプリットが起きる部分と重畳しないようになり、炭酸
カルシウムスケールの発生が防止される。In such an electric deionization apparatus, since the flow directions of the dilution water and the concentrated water are in the cross direction, the passage area of the concentrated water in which the calcium ion concentration is increased corresponds to the portion where the water split occurs. No overlapping occurs, and the generation of calcium carbonate scale is prevented.
【００１９】例えば、希釈水を巻回体の外周側からスパ
イラル方向に巻回体中心に向って流し、濃縮水を巻回体
の軸心線方向と平行方向（希釈水の通水方向と直交方
向）に流した場合、濃縮室のうちカルシウムイオン濃度
の高い部分は巻回体の外周側に近い領域となり、一方炭
酸イオン濃度の高い部分は巻回体の中心側に近い領域と
なり、濃縮室内での炭酸カルシウムスケールの発生が防
止される。For example, the dilution water flows in the spiral direction from the outer peripheral side of the wound body toward the center of the wound body, and the concentrated water flows in a direction parallel to the axial direction of the wound body (perpendicular to the flowing direction of the dilution water). Direction), the portion of the concentration chamber where the calcium ion concentration is high is a region near the outer periphery of the wound body, while the portion where the carbonate ion concentration is high is a region near the center side of the wound body and the concentration chamber Calcium carbonate scale is prevented from being generated at the surface.
【００２０】本発明では、かかる請求項１，２の構成を
併有することにより（請求項３）、双方の効果を得るこ
とができる。According to the present invention, both of the effects can be obtained by having the configurations of claims 1 and 2 together (claim 3).
【００２１】[0021]
【発明の実施の形態】以下、図１〜４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スパイ
ラル型電気式脱イオン装置の巻回体軸心線と直交方向の
断面図、図２は図１の中心付近の拡大図、図３は図１の
外周付近の拡大図、図４は平たく延したリーフの断面図
（ただし巻回体の外周から中心に向う方向に沿う断面
図）、図５〜７は図４のＶ−Ｖ線ないしVII−VII線に沿
う断面図、図８はこの電気式脱イオン装置の巻回体軸心
線方向の断面図である。Embodiments of the present invention will be described below with reference to FIGS. 1 is a cross-sectional view of the spiral electric deionization apparatus according to the embodiment in a direction orthogonal to the axis of the wound body, FIG. 2 is an enlarged view near the center of FIG. 1, and FIG. FIG. 4 is an enlarged view, FIG. 4 is a cross-sectional view of a flat extended leaf (however, a cross-sectional view along the direction from the outer periphery of the wound body toward the center), and FIGS. 5 to 7 are along the line VV or VII-VII in FIG. FIG. 8 is a cross-sectional view of the electric deionization device taken along the axis of the wound body.
【００２２】図４，６の通り、この実施の形態で用いら
れているリーフ（イオン交換膜の積層シート）８は、２
枚のアニオン交換膜１と２枚のカチオン交換膜２とを交
互に即ちアニオン交換膜１（１ａ）、カチオン交換膜２
（２ａ）、アニオン交換膜１（１ｂ）、カチオン交換膜
２（２ｂ）の順に積層配置したものである。外面に臨む
アニオン交換膜１（１ａ）とそれに隣接するカチオン交
換膜２（２ａ）との間及び、外面に臨むカチオン交換膜
２（２ｂ）とそれに隣接するアニオン交換膜１（１ｂ）
との間の希釈室にはそれぞれイオン交換樹脂などのイオ
ン交換体３が充填されている。As shown in FIGS. 4 and 6, the leaf (laminated sheet of ion exchange membrane) 8 used in this embodiment
The two anion exchange membranes 1 and the two cation exchange membranes 2 are alternately arranged, ie, the anion exchange membrane 1 (1a) and the cation exchange membrane 2
(2a), an anion exchange membrane 1 (1b), and a cation exchange membrane 2 (2b) are stacked and arranged in this order. Between the anion exchange membrane 1 (1a) facing the outer surface and the cation exchange membrane 2 (2a) adjacent thereto, and the cation exchange membrane 2 (2b) facing the outer surface and the anion exchange membrane 1 (1b) adjacent thereto
Are filled with an ion exchanger 3 such as an ion exchange resin.
【００２３】リーフ８の内部に配置されたカチオン交換
膜２ａとアニオン交換膜１ｂとの間の濃縮室には、メッ
シュなどよりなるスペーサ（インナスペーサ）７ａが介
在されている。In the concentration chamber between the cation exchange membrane 2a and the anion exchange membrane 1b disposed inside the leaf 8, a spacer (inner spacer) 7a made of a mesh or the like is interposed.
【００２４】各交換膜１，２はいずれも方形であり、外
面側のアニオン交換膜１ａとカチオン交換膜２ｂとは４
辺において縁部同士が水密的に結合（例えば接着）され
ている。Each of the exchange membranes 1 and 2 is rectangular, and the outer anion exchange membrane 1a and the cation exchange membrane 2b are
The edges are water-tightly joined (for example, bonded) at the sides.
【００２５】巻回時に外周側となる辺にあっては、孔明
きパイプ等よりなる補強体９ａをこの交換膜１ａ，２ｂ
間に介在させることにより給水室９が該辺方向に沿って
設けられている。交換膜１ａ，２ａ間及び交換膜１ｂ，
２ｂ間の希釈室はいずれもこの給水室９に連通してい
る。On the side that is the outer peripheral side at the time of winding, a reinforcing member 9a made of a perforated pipe or the like is provided with the exchange membranes 1a and 2b.
The water supply chamber 9 is provided along the side direction by being interposed therebetween. Between the exchange membranes 1a, 2a and between the exchange membranes 1b,
All dilution chambers between 2b communicate with this water supply chamber 9.
【００２６】巻回時に中心側となる辺に沿う部分にあっ
ては、交換膜１ａ，２ｂ間に孔明きパイプ等よりなる補
強体１０ａが介在されることにより希釈水取出室１０が
形成されている。交換膜１ａ，２ａ間及び交換膜１ｂ，
２ｂ間の希釈室はこの希釈水取出室１０に連通してい
る。この希釈水取出室１０に希釈水取出管２７（図７，
８）が接続される。In the portion along the side that is the center side during winding, a diluting water extraction chamber 10 is formed by interposing a reinforcing body 10a made of a perforated pipe or the like between the exchange membranes 1a and 2b. I have. Between the exchange membranes 1a, 2a and between the exchange membranes 1b,
The dilution chamber between 2b communicates with the dilution water extraction chamber 10. The dilution water outlet pipe 27 (FIG. 7, FIG.
8) is connected.
【００２７】交換膜２ａ，１ｂ間の濃縮室は、この交換
膜２ａ，１ｂの給水室９及び希釈水取出室１０に沿う辺
においてそれぞれ相互に水密的に結合されており、この
交換膜２ａ，１ｂ間の濃縮室は給水室９及び希釈水取出
室１０には連通していない。The enrichment chamber between the exchange membranes 2a and 1b is connected to each other in a water-tight manner on the sides of the exchange membranes 2a and 1b along the water supply chamber 9 and the diluting water extraction chamber 10, respectively. The enrichment chamber between 1b does not communicate with the water supply chamber 9 and the dilution water removal chamber 10.
【００２８】図６の通り、この給水室９と希釈水取出室
１０とを結ぶ方向の辺（巻回時にスパイラル方向となる
辺）のうちの一方（図５の左辺。以下、左辺という。）
にあっては交換膜２ａ，１ｂ間が開放し原水流入部１３
となっている。As shown in FIG. 6, one of the sides in the direction connecting the water supply chamber 9 and the dilution water extraction chamber 10 (the side that becomes a spiral direction at the time of winding) (the left side in FIG. 5, hereinafter referred to as the left side).
In this case, the space between the exchange membranes 2a and 1b is opened,
It has become.
【００２９】この左辺と平行な右辺にあっては、図６の
通り交換膜２ａ，１ｂ間が開放し濃縮室流出部１４とな
っている。On the right side parallel to the left side, the space between the exchange membranes 2a and 1b is open as shown in FIG.
【００３０】このリーフ８を、陽極としての中心電極２
１の周囲にアウタスペーサ７ｂと共にスパイラル状に巻
回して巻回体１２（図８）とする。The leaf 8 is connected to the center electrode 2 as an anode.
1 and a spirally wound body 12 (FIG. 8) together with the outer spacer 7b.
【００３１】この巻回体１２のリーフ８内には、イオン
交換体が充填された２個の希釈室５が存在し、この２個
の希釈室５の間にインナスペーサ７ａを有した１個の濃
縮室６が存在する。このリーフ８をアウタスペーサ７ｂ
を介してスパイラル状に巻回しているので、リーフ８同
士の間にはこのスペーサ７ｂにより濃縮室５が形成され
る。この結果、この巻回体１２にあっては、径方向に希
釈室５、濃縮室６が交互に多数配列されることになる。In the leaf 8 of the wound body 12, there are two dilution chambers 5 filled with an ion exchanger, and one of the dilution chambers 5 having an inner spacer 7a between the two dilution chambers 5 is provided. There is a concentration chamber 6 of This leaf 8 is connected to the outer spacer 7b.
The enrichment chamber 5 is formed between the leaves 8 by the spacers 7b. As a result, in the wound body 12, a large number of dilution chambers 5 and concentration chambers 6 are alternately arranged in the radial direction.
【００３２】この巻回体１２を外側電極（陰極）を兼ね
る筒状容器２２内に収容し、希釈水取出室１０に接続さ
れた希釈水取出管２７を容器２２の一端面から外方に突
出させる。巻回体１２の左端面は容器２２内の左端側の
原水導入室２４に臨んでおり、巻回体１２の右端面は容
器２２内の右端側の濃縮水取出室２５に臨んでいる。The wound body 12 is accommodated in a cylindrical container 22 also serving as an outer electrode (cathode), and a diluting water extracting pipe 27 connected to the diluting water extracting chamber 10 projects outward from one end surface of the container 22. Let it. The left end face of the wound body 12 faces the raw water introduction chamber 24 on the left end side in the container 22, and the right end face of the wound body 12 faces the concentrated water extraction chamber 25 on the right end side in the container 22.
【００３３】巻回体１２の各濃縮室６は原水導入室２４
と濃縮水取出室２５に連通している。また、巻回体１２
の給水室９も該原水導入室２４に連通している。この給
水室９は濃縮水取出室２５には連通していない。Each of the concentrating chambers 6 of the wound body 12 has a raw water introduction chamber 24.
And the concentrated water removal chamber 25. In addition, the winding body 12
The water supply chamber 9 also communicates with the raw water introduction chamber 24. The water supply chamber 9 does not communicate with the concentrated water discharge chamber 25.
【００３４】このように構成された電気式脱イオン装置
において、原水は容器２２のポート２３から原水導入室
２４に流入し、その一部はリーフ８の給水室９内に流入
し、該給水室９から各希釈室５内に分配され、各希釈室
５内をスパイラル方向に流れる。In the electric deionization apparatus configured as described above, the raw water flows into the raw water introduction chamber 24 from the port 23 of the container 22, and a part of the raw water flows into the water supply chamber 9 of the leaf 8. From 9, it is distributed into each dilution chamber 5 and flows in each dilution chamber 5 in a spiral direction.
【００３５】原水導入室２４内の原水の他部は、巻回体
１２にスペーサ７ａ，７ｂによって形成された濃縮室６
内を巻回体１２の軸心線と平行方向に流れ、濃縮水取出
室２５に流入し、容器２２のポート２６から取り出され
る。The other part of the raw water in the raw water introduction chamber 24 is connected to the enrichment chamber 6 formed by the wound body 12 with the spacers 7a and 7b.
It flows through the inside in a direction parallel to the axis of the wound body 12, flows into the concentrated water removal chamber 25, and is taken out from the port 26 of the container 22.
【００３６】前記希釈室５内を流れる間に原水中のアニ
オンはアニオン交換膜１を透過して中心側に隣接する濃
縮室６に移動し、カチオンはカチオン交換膜２を透過し
て外周側に隣接する濃縮室６に移動する。このようにし
て脱イオン処理された希釈水がリーフ８の希釈水取出室
１０に流入し、希釈水取出管２７を介して取り出され
る。While flowing in the dilution chamber 5, the anions in the raw water permeate the anion exchange membrane 1 and move to the concentrating chamber 6 adjacent to the center side, and the cations permeate the cation exchange membrane 2 to the outer periphery. It moves to the adjacent concentration chamber 6. The diluted water thus deionized flows into the diluted water extracting chamber 10 of the leaf 8 and is extracted through the diluted water extracting pipe 27.
【００３７】この電気式脱イオン装置にあっては、リー
フ８内に給水室９と希釈水取出室１０とを結ぶ２系統の
希釈水室５が存在する。即ち、交換膜１ａ，２ａ間の希
釈水室５と交換膜１ｂ，２ｂ間の希釈水室５のいずれも
が給水室９と希釈水取出室１０との間にスパイラル方向
に延在している。このため、給水室９から希釈水取出室
１０へ向う希釈水の通水圧損が小さい。In this electric deionization apparatus, there are two systems of dilution water chambers 5 connecting a water supply chamber 9 and a dilution water extraction chamber 10 in a leaf 8. That is, both the dilution water chamber 5 between the exchange membranes 1a and 2a and the dilution water chamber 5 between the exchange membranes 1b and 2b extend in the spiral direction between the water supply chamber 9 and the dilution water extraction chamber 10. . For this reason, the flow pressure loss of the dilution water from the water supply chamber 9 to the dilution water extraction chamber 10 is small.
【００３８】また、濃縮水は原水導入室２４から濃縮水
取出室２５へ向って巻回体１２の軸心線と平行方向に通
水されるので、カルシウムイオンの濃度の高い巻回体外
周側の濃縮水と炭酸イオンの濃度の高い巻回体中心側の
濃縮水とが混合されることが回避され、炭酸カルシウム
スケールの発生が防止されるようになる。Since the concentrated water is passed from the raw water introduction chamber 24 to the concentrated water removal chamber 25 in a direction parallel to the axis of the wound body 12, the outer periphery of the wound body having a high concentration of calcium ions. Is prevented from being mixed with the concentrated water at the center of the wound body having a high concentration of carbonate ions, and the generation of calcium carbonate scale is prevented.
【００３９】上記実施の形態では２枚のカチオン交換膜
と２枚のアニオン交換膜とによって１つのリーフ８を形
成しているが、各交換膜を３枚以上積層してリーフを形
成してもよい。In the above embodiment, one leaf 8 is formed by two cation exchange membranes and two anion exchange membranes. However, three or more exchange membranes may be laminated to form a leaf. Good.
【００４０】[0040]
【実施例】次に具体的な実施例について説明する。な
お、以下の実施例及び比較例で用いたリーフサイズは幅
１２００ｍｍ、スパイラル方向長さ１８００ｍｍであ
る。EXAMPLES Next, specific examples will be described. The leaf size used in the following examples and comparative examples is 1200 mm in width and 1800 mm in length in the spiral direction.
【００４１】実施例１ アニオン交換膜及びカチオン交換膜をそれぞれ２枚ずつ
交互に積層したリーフを用いて図１〜８の通り電気式脱
イオン装置を構成した。この巻回体の直径は２５０ｍｍ
であった。Example 1 An electric deionization apparatus was constructed as shown in FIGS. 1 to 8 using leaves in which two anion exchange membranes and two cation exchange membranes were alternately laminated. The diameter of this roll is 250 mm
Met.
【００４２】比較例１ アニオン交換膜及びカチオン交換膜を１枚ずつ積層した
リーフを用い図９の如くして電気式脱イオン装置を構成
した。この巻回体の直径は２００ｍｍであった。COMPARATIVE EXAMPLE 1 An electric deionization apparatus was constructed as shown in FIG. 9 using leaves in which an anion exchange membrane and a cation exchange membrane were laminated one by one. The diameter of the wound body was 200 mm.
【００４３】この実施例１及び比較例１の電気式脱イオ
ン装置を表１の条件で運転したところ表２に示す処理水
質が得られた。When the electric deionizers of Example 1 and Comparative Example 1 were operated under the conditions shown in Table 1, the treated water quality shown in Table 2 was obtained.
【００４４】[0044]
【表１】 [Table 1]
【００４５】[0045]
【表２】 [Table 2]
【００４６】表１より、本発明のモジュールによれば、
従来法に比べて希釈室通水圧損が増加することなく処理
水量を１．０ｍ３／ｈから２．０ｍ３／ｈへ、２倍に増
加できることがわかる。また表２より、実施例１によっ
ても従来例たる比較例１と同等の生産水水質が得られる
ことが確認できた。From Table 1, according to the module of the present invention,
The amount of treated water without dilution chamber through pressure loss as compared with the conventional method is increased from 1.0 m 3 / h to 2.0 m 3 / h, it can be seen that increased twice. Also, from Table 2, it was confirmed that the same water quality as that of the comparative example 1 as the conventional example can be obtained by the example 1.
【００４７】なお、原水としてＲＯ（逆浸透膜）処理水
質に塩化カルシウムを添加してＣａ濃度を０．６ｐｐｍ
としたものを用いたこと以外は実施例１、比較例１と同
様にして運転したところ、比較例１の装置は徐々に電流
が低下し、生産水比抵抗は１．０ＭΩ・ｃｍ以下となっ
た。解体したところ濃縮室側のイオン交換膜面に炭酸カ
ルシウムスケールが付着していた。一方、本発明のモジ
ュールでは炭酸カルシウムスケールは発生せず、その生
産水の比抵抗は１８．０ＭΩ・ｃｍであった。In addition, calcium chloride is added to the RO (reverse osmosis membrane) treated water as raw water to reduce the Ca concentration to 0.6 ppm.
The operation was carried out in the same manner as in Example 1 and Comparative Example 1, except that the current was gradually decreased, and the specific resistance of the produced water became 1.0 MΩ · cm or less. Was. Upon disassembly, calcium carbonate scale was adhered to the ion exchange membrane surface on the concentration room side. On the other hand, the calcium carbonate scale was not generated in the module of the present invention, and the specific resistance of the produced water was 18.0 MΩ · cm.
【００４８】[0048]
【発明の効果】以上の通り、本発明（請求項１）の電気
式脱イオン装置によると通水圧損を増大させることなく
通水流量を増大させ、しかも従来と同等の高処理水質を
得ることができる。As described above, according to the electric deionization apparatus of the present invention (claim 1), it is possible to increase the flow rate of water without increasing the pressure loss of water flow and to obtain the same high treated water quality as before. Can be.
【００４９】本発明（請求項２）の電気式脱イオン装置
によると濃縮室でのスケール発生を防止することができ
る。According to the electric deionization apparatus of the present invention (claim 2), it is possible to prevent the generation of scale in the concentration chamber.
【００５０】本発明（請求項３）の電気式脱イオン装置
によるとこれらの双方の効果を得ることができる。According to the electric deionization apparatus of the present invention (claim 3), both of these effects can be obtained.
【図１】実施の形態に係るスパイラル型電気式脱イオン
装置の巻回体軸心線と直交方向の断面図である。FIG. 1 is a cross-sectional view of a spiral electric deionization apparatus according to an embodiment, taken in a direction orthogonal to a winding body axis.
【図２】図１の中心付近の拡大図である。FIG. 2 is an enlarged view near the center of FIG. 1;
【図３】図１の外周付近の拡大図である。FIG. 3 is an enlarged view near the outer periphery of FIG. 1;
【図４】リーフの断面図である。FIG. 4 is a sectional view of a leaf.
【図５】図４のＶ−Ｖ線に沿う断面図である。FIG. 5 is a sectional view taken along line VV in FIG. 4;
【図６】図４のVI−VI線に沿う断面図である。6 is a sectional view taken along the line VI-VI in FIG.
【図７】図４のVII−VII線に沿う断面図である。FIG. 7 is a sectional view taken along the line VII-VII in FIG. 4;
【図８】実施の形態に係る電気式脱イオン装置の軸心線
方向の断面図である。FIG. 8 is a cross-sectional view of the electric deionization apparatus according to the embodiment taken along the axis of the axis;
【図９】従来例を示す断面図である。FIG. 9 is a sectional view showing a conventional example.
１，１ａ，１ｂ アニオン交換膜 ２，２ａ，２ｂ カチオン交換膜 ３ イオン交換体 ４ リーフ ５ 希釈室 ６ 濃縮室 ７，７ａ，７ｂ スペーサ ８ リーフ ９ 給水室 １０ 希釈水取出室 １２ 巻回体 ２１ 中心電極 ２２ 容器 ２４ 原水導入室 ２５ 濃縮水取出室 ２７ 希釈水取出管 DESCRIPTION OF SYMBOLS 1, 1a, 1b Anion exchange membrane 2, 2a, 2b Cation exchange membrane 3 Ion exchanger 4 Leaf 5 Dilution room 6 Concentration room 7, 7a, 7b Spacer 8 Leaf 9 Water supply room 10 Dilution water removal room 12 Winding body 21 Center Electrode 22 Vessel 24 Raw water introduction chamber 25 Concentrated water extraction chamber 27 Dilution water extraction pipe
Claims (3)
心電極の外周にスパイラル状に巻回してなる巻回体と、 該巻回体の外周に配置された外側電極とを備えてなり、 これらの電極の間に、該交換膜によって隔てられた濃縮
室と希釈室とが交互に配列されている電気式脱イオン装
置において、 該積層シートは、交互に積層配置された複数枚のアニオ
ン交換膜及びカチオン交換膜を有することを特徴とする
電気式脱イオン装置。1. A wound body obtained by spirally winding a laminated sheet of a center electrode, an anion exchange membrane and a cation exchange membrane around the center electrode, and an outside arranged on the outer periphery of the wound body An electrode type deionization apparatus comprising: an electrode; and a concentration chamber and a dilution chamber separated by the exchange membrane are alternately arranged between the electrodes. An electrodeionization device comprising: a plurality of anion exchange membranes and cation exchange membranes.
心電極の外周にスパイラル状に巻回してなる巻回体と、 該巻回体の外周に配置された外側電極とを備えてなり、 これらの電極の間に、該交換膜によって隔てられた濃縮
室と希釈室とが交互に配列されている電気式脱イオン装
置において、 該濃縮室及び希釈室の一方における通水方向はスパイラ
ル方向であり、他方における通水方向はスパイラル方向
と交叉する方向であることを特徴とする電気式脱イオン
装置。2. A wound body formed by spirally winding a laminated sheet of a center electrode, an anion exchange membrane and a cation exchange membrane around an outer periphery of the center electrode, and an outer side arranged on the outer periphery of the wound body An electrode deionization apparatus comprising: an electrode; and a concentration chamber and a dilution chamber separated by the exchange membrane are alternately arranged between the electrodes. An electric deionization apparatus characterized in that the direction of water flow is a spiral direction and the direction of water flow on the other side is a direction crossing the spiral direction.
置が請求項１の電気式脱イオン装置であることを特徴と
する電気式脱イオン装置。3. An electric deionization apparatus according to claim 2, wherein said electric deionization apparatus is the electric deionization apparatus according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000008075A JP2001198576A (en) | 2000-01-17 | 2000-01-17 | Electric deionizing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000008075A JP2001198576A (en) | 2000-01-17 | 2000-01-17 | Electric deionizing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001198576A true JP2001198576A (en) | 2001-07-24 |
Family
ID=18536410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000008075A Pending JP2001198576A (en) | 2000-01-17 | 2000-01-17 | Electric deionizing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001198576A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004101119A1 (en) * | 2003-05-17 | 2004-11-25 | Christ Ag | Spiral module with axial dilution flow |
| WO2006047945A1 (en) * | 2004-11-02 | 2006-05-11 | Zhejiang Omex Environmental Ltd. | A turn-back flow edi |
| CN105060420A (en) * | 2015-08-18 | 2015-11-18 | 浙江中凯瑞普环境工程股份有限公司 | Improved roll-type electric demineralization device |
| JP2016505358A (en) * | 2012-11-19 | 2016-02-25 | エヴォクア ウォーター テクノロジーズ エルエルシーＥｖｏｑｕａ Ｗａｔｅｒ Ｔｅｃｈｎｏｌｏｇｉｅｓｌｌｃ | Electrochemical separator |
-
2000
- 2000-01-17 JP JP2000008075A patent/JP2001198576A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004101119A1 (en) * | 2003-05-17 | 2004-11-25 | Christ Ag | Spiral module with axial dilution flow |
| US7927478B2 (en) | 2003-05-17 | 2011-04-19 | P & Ls Holding Gmbh | Spiral wound module having axial dilution chamber flow |
| WO2006047945A1 (en) * | 2004-11-02 | 2006-05-11 | Zhejiang Omex Environmental Ltd. | A turn-back flow edi |
| AU2005300953B2 (en) * | 2004-11-02 | 2010-04-29 | Zhejiang Omex Environmental Engineering Co., Ltd. | A turn-back flow EDI |
| US8173003B2 (en) | 2004-11-02 | 2012-05-08 | Zhejiang Omex Environmental Engineering Co., Ltd. | Turn-back flow EDI |
| JP2016505358A (en) * | 2012-11-19 | 2016-02-25 | エヴォクア ウォーター テクノロジーズ エルエルシーＥｖｏｑｕａ Ｗａｔｅｒ Ｔｅｃｈｎｏｌｏｇｉｅｓｌｌｃ | Electrochemical separator |
| CN105060420A (en) * | 2015-08-18 | 2015-11-18 | 浙江中凯瑞普环境工程股份有限公司 | Improved roll-type electric demineralization device |
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