JPH0824585A - Concentration method of aqueous solution - Google Patents
Concentration method of aqueous solutionInfo
- Publication number
- JPH0824585A JPH0824585A JP18195594A JP18195594A JPH0824585A JP H0824585 A JPH0824585 A JP H0824585A JP 18195594 A JP18195594 A JP 18195594A JP 18195594 A JP18195594 A JP 18195594A JP H0824585 A JPH0824585 A JP H0824585A
- Authority
- JP
- Japan
- Prior art keywords
- aqueous solution
- water vapor
- concentrating
- permeable membrane
- selective permeable
- 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
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
(57)【要約】
【目的】小規模にでき、対象とする水溶液の適用範囲が
広く、経済効率の高い、水溶液の濃縮方法を提供する。
【構成】水溶液を濃縮するにあたり、水溶液を水蒸気選
択透過膜の一方の面側に導入し、水蒸気選択透過膜の他
方の面側に搬送気体を導入して、水蒸気選択透過膜を介
して水溶液中の水分を搬送気体側に移行させることによ
り水溶液を濃縮する。(57) [Abstract] [Purpose] To provide a method for concentrating an aqueous solution, which can be made on a small scale, has a wide range of application of the targeted aqueous solution, and is highly economical. [Structure] When concentrating an aqueous solution, the aqueous solution is introduced into one side of a water vapor selective permeable membrane, and a carrier gas is introduced into the other side of the water vapor selective permeable membrane, and the aqueous solution is introduced through the water vapor selective permeable membrane. The aqueous solution is concentrated by migrating the water of the above to the carrier gas side.
Description
【０００１】[0001]
【産業上の利用分野】本発明は水溶液の濃縮方法に関す
る。FIELD OF THE INVENTION The present invention relates to a method for concentrating an aqueous solution.
【０００２】[0002]
【従来の技術】水溶液の濃縮方法には蒸発法、逆浸透膜
を用いる方法及びイオン交換膜を用いて電解質の溶解し
た水溶液を電気透析により濃縮する方法等が知られてい
る。2. Description of the Related Art As a method for concentrating an aqueous solution, there are known an evaporation method, a method using a reverse osmosis membrane, a method of concentrating an aqueous solution in which an electrolyte is dissolved by an electrodialysis using an ion exchange membrane, and the like.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、蒸発法
は、規模が大きく対象とする水溶液に対して充分耐食性
があり安価で加工性のある材料が使用できる場合には効
率的で経済性が良好な方法であるが、規模が小さく対象
とする水溶液に対して耐食性のある材料が高価で加工性
の悪い場合には経済効率が極めて悪いことが知られてい
る。However, the evaporation method is efficient and economical when the material is large in scale and has sufficient corrosion resistance to the target aqueous solution and is inexpensive and processable. Although it is a method, it is known that the economical efficiency is extremely poor when the material having a small scale and corrosion resistance to the target aqueous solution is expensive and the workability is poor.
【０００４】また逆浸透膜を用いる方法では、原液の濃
度が大きいと浸透圧の関係上、必要動力が極めて大きく
なり、濃度の大きな原液を更に濃縮する用途に対しては
経済効率が極めて悪かった。また逆浸透膜法では、用い
られている素材は通常耐食性が余り大きくなく、このた
め濃縮の対象とされる水溶液は極めて限定されたもので
あった。In the method using a reverse osmosis membrane, the required power becomes extremely large due to the osmotic pressure when the concentration of the stock solution is large, and the economical efficiency is extremely poor for the purpose of further concentrating the stock solution having a large concentration. . Further, in the reverse osmosis membrane method, the material used is usually not so corrosive, so that the aqueous solution to be concentrated is extremely limited.
【０００５】さらにイオン交換膜を用いて電解質の溶解
した水溶液を電気透析により濃縮する方法は電解質の薄
い水溶液には効率的であるが、装置が複雑であり小規模
の設備に対しては経済性が必ずしも充分ではなかった。Further, a method of concentrating an aqueous solution in which an electrolyte is dissolved by using an ion exchange membrane by electrodialysis is effective for an aqueous solution having a thin electrolyte, but the apparatus is complicated and economical for a small-scale facility. Was not always enough.
【０００６】本発明は、小規模にでき、対象とする水溶
液の適用範囲が広く、経済効率の高い、水溶液の濃縮方
法を提供することを目的とする。[0006] It is an object of the present invention to provide a method for concentrating an aqueous solution, which can be made on a small scale, has a wide range of application of the targeted aqueous solution, and has high economic efficiency.
【０００７】[0007]
【課題を解決するための手段】請求項１に記載の発明で
は、水溶液を濃縮するにあたり、水溶液を水蒸気選択透
過膜の一方の面側に導入し、水蒸気選択透過膜の他方の
面側に搬送気体を導入し、水蒸気選択透過膜を介して水
溶液中の水分を搬送気体側に移行させることにより水溶
液を濃縮するように構成されている。According to the invention of claim 1, in concentrating the aqueous solution, the aqueous solution is introduced to one surface side of the water vapor selective permeable membrane and conveyed to the other surface side of the water vapor selective permeable membrane. The gas is introduced, and the water in the aqueous solution is transferred to the carrier gas side through the water vapor selective permeable membrane to concentrate the aqueous solution.
【０００８】請求項２に記載の発明では、請求項１に記
載の水溶液の濃縮方法において、搬送気体として外気を
用いている。In the invention described in claim 2, in the method for concentrating an aqueous solution according to claim 1, outside air is used as a carrier gas.
【０００９】請求項３に記載の発明では、請求項１又は
２に記載の水溶液の濃縮方法において、濃縮すべき水溶
液又は搬送気体の両方又は一方を気温より５℃以上加熱
するようにしている。According to the third aspect of the present invention, in the method for concentrating an aqueous solution according to the first or second aspect, both or one of the aqueous solution to be concentrated and the carrier gas are heated to 5 ° C. or more from the ambient temperature.
【００１０】請求項４に記載の発明では、請求項１〜３
のいずれか１つに記載の水溶液の濃縮方法において、水
蒸気選択透過膜がパ−フルオロスルホン酸系陽イオン交
換膜より形成されている。According to the invention described in claim 4,
In the method for concentrating an aqueous solution described in any one of 1, the water vapor selective permeable membrane is formed of a perfluorosulfonic acid cation exchange membrane.
【００１１】請求項５に記載の発明では、請求項１〜４
のいずれか１つに記載の水溶液の濃縮方法において、水
蒸気選択透過膜からなる、入口と出口を有する封筒状体
を外側にスぺーサーを配置して巻き込んでなるモジュ−
ルの、封筒状体の内部に水溶液を通過させ、封筒状体の
外部に搬送気体を導入して水溶液中の水分を水蒸気選択
透過膜を介して搬送気体側に移行させることにより水溶
液を濃縮するようにしている。According to the invention described in claim 5, claims 1 to 4 are provided.
In the method for concentrating an aqueous solution as described in any one of 1, a module comprising an envelope-like body having a water vapor selective permeable membrane and having an inlet and an outlet and having a spacer disposed outside and enclosing the envelope.
The aqueous solution is concentrated by allowing the aqueous solution to pass through the inside of the envelope and introducing the carrier gas to the outside of the envelope to transfer the water in the aqueous solution to the carrier gas side through the water vapor permselective membrane. I am trying.
【００１２】本発明は基本的には水溶液と搬送気体の間
の分圧差による水分の蒸発現象を利用した濃縮法であ
る。水溶液と外部に分圧差を付けるために真空ポンプで
減圧することも可能であるが、しかしこの方法では減圧
を保つために気密保持が必要となり設備のコストが増大
する。また水蒸気の移行に対しても、搬送気体が皆無か
極めて少ないため水蒸気の移動速度を増大させにくい。
そこで本発明では搬送気体を導入する方法を用いてい
る。The present invention is basically a concentration method utilizing the evaporation phenomenon of water due to the partial pressure difference between the aqueous solution and the carrier gas. It is also possible to reduce the pressure with a vacuum pump in order to create a partial pressure difference between the aqueous solution and the outside, but this method requires air-tightness to maintain the reduced pressure, which increases the cost of the equipment. Further, even when water vapor is transferred, it is difficult to increase the moving speed of water vapor because there is no or very little carrier gas.
Therefore, in the present invention, the method of introducing the carrier gas is used.
【００１３】搬送気体としては、圧縮空気を用いたり、
冷凍法や吸着法などの除湿機より得られる乾燥空気を用
いることもできるが、大がかりな装置や、過大なエネル
ギーを必要するので好ましくない。本発明では外気を用
いている。外気は低圧ファン等で導入でき大掛かりな装
置を必要とせず経済的である。Compressed air may be used as the carrier gas,
Although dry air obtained from a dehumidifier such as a freezing method or an adsorption method can be used, it is not preferable because a large-scale device and excessive energy are required. In the present invention, outside air is used. The outside air can be introduced with a low-pressure fan, etc., and it is economical without requiring a large-scale device.
【００１４】通常、外気の相対湿度は２０〜８０％程度
であることが多いが、水溶液の温度が外気より低いと、
導入させた外気が冷却され、場合によっては飽和に近く
なる可能性があり、この場合には水溶液の濃縮は期待で
きない。そのため、安定して濃縮操作を行なうために
は、導入した外気を、気温より５℃以上、好ましくは１
０℃以上加熱する方が好ましい。Usually, the relative humidity of the outside air is often about 20 to 80%, but when the temperature of the aqueous solution is lower than that of the outside air,
The introduced outside air may be cooled and in some cases may approach saturation, in which case concentration of the aqueous solution cannot be expected. Therefore, in order to perform a stable concentration operation, the introduced outside air should be kept at 5 ° C or higher, preferably 1 ° C or higher than the ambient temperature.
It is preferable to heat at 0 ° C or higher.
【００１５】一方、前述の通り、水分の外気への移行は
蒸発現象であるので、濃縮操作の際に水溶液の温度低下
が起きる。水溶液の温度が低下すると、水蒸気の透過速
度が低下し、同時に、導入された外気の温度も低下させ
てしまう。そこで、水溶液の温度も気温より５℃以上、
好ましくは１０℃以上加熱するのが好ましい。On the other hand, as described above, since the transfer of water to the outside air is an evaporation phenomenon, the temperature of the aqueous solution drops during the concentration operation. When the temperature of the aqueous solution decreases, the water vapor permeation rate decreases, and at the same time, the temperature of the introduced outside air also decreases. Therefore, the temperature of the aqueous solution is 5 ° C or higher than the ambient temperature,
It is preferable to heat at 10 ° C. or higher.
【００１６】なお、水溶液と、導入した外気の両方を加
熱しても、あるいは、いずれにしろ起こる水蒸気選択透
過膜を介しての熱移動を考慮して、一方だけを加熱して
もよい。Both the aqueous solution and the introduced outside air may be heated, or only one may be heated in consideration of heat transfer through the water vapor permselective membrane whichever occurs.
【００１７】本発明で用いることができる水蒸気選択透
過膜の材質としては、例えばセロファン、シリコン樹
脂、透湿性ウレタン樹脂、イオン交換樹脂等があり、こ
のほか水蒸気選択透過性を有するものであれば使用でき
る。この中でも強度、耐薬品性の点でイオン交換樹脂膜
を使用するのが好ましい。またイオン交換樹脂でも、水
蒸気透過性、耐薬品性、強度の点で含フッ素スルフォン
酸型が特に好ましい。Examples of the material of the water vapor selective permeable membrane that can be used in the present invention include cellophane, silicone resin, moisture permeable urethane resin, ion exchange resin, and the like. it can. Among these, it is preferable to use an ion exchange resin membrane in terms of strength and chemical resistance. Also for the ion exchange resin, the fluorine-containing sulfonic acid type is particularly preferable in terms of water vapor permeability, chemical resistance and strength.
【００１８】なかでも本発明の水蒸気選択透過膜として
は、以下の化１の構造式を有するパ−フルオロスルホン
酸系陽イオン交換膜が好ましく、特に固定イオン濃度１
〜６Ｎ、好ましくは２〜５Ｎ、吸水率２０〜２５０重量
％、好ましくは２２〜１１０重量％、膜厚０．１〜１０
０μｍ、好ましくは１〜８０μｍのものが適当である。
ここで吸水率は、乾燥膜重量当たりの膜に含まれる水分
量の百分率で表され、また固定イオン濃度は、膜に含ま
れる水分当たりのイオン交換容量で表される。Among them, as the water vapor selective permeable membrane of the present invention, a perfluorosulfonic acid type cation exchange membrane having the following structural formula 1 is preferable, and a fixed ion concentration of 1 is particularly preferable.
-6 N, preferably 2-5 N, water absorption 20-250 wt%, preferably 22-110 wt%, film thickness 0.1-10
A particle size of 0 μm, preferably 1 to 80 μm is suitable.
Here, the water absorption rate is represented by the percentage of the amount of water contained in the membrane per dry membrane weight, and the fixed ion concentration is represented by the ion exchange capacity per water contained in the membrane.
【００１９】[0019]
【化１】 Embedded image
【００２０】化１において、ｐ、ｑは正の数であり、そ
の比ｑ／ｐは２〜１６、ｍは０または１、ｎは１〜５の
整数である。Ｍは水素原子又はＮａ、Ｋなどの金属原子
を表す。In Chemical formula 1, p and q are positive numbers, the ratio q / p is 2 to 16, m is 0 or 1, and n is an integer of 1 to 5. M represents a hydrogen atom or a metal atom such as Na or K.
【００２１】水蒸気選択透過膜としては、水蒸気選択透
過性をもつ樹脂の単層膜を用いることができる。しかし
通常、水蒸気選択透過樹脂は水存在下では１％〜１５０
％程度膨潤し、それにつれて強度、特に剛性と引き裂き
強度が低下することが多い。また透過度を上げコストを
下げる点から通常高価な水蒸気選択透過性樹脂を薄膜化
することが好ましい。この２点から強度とのバランスを
取るために補強体を使うことが好ましい。補強体として
は例えば織布、不織布、メッシュ、多孔体又はこれらの
組み合わせなどを用いることができる。As the water vapor selective permeable membrane, a resin single layer film having water vapor selective permeability can be used. However, normally, the water vapor permselective resin is 1% to 150% in the presence of water.
%, And strength, particularly rigidity and tear strength, are often reduced accordingly. Further, from the viewpoint of increasing the permeability and reducing the cost, it is preferable to form a thin film of a normally expensive water vapor permselective resin. From these two points, it is preferable to use a reinforcing body in order to balance the strength. As the reinforcing body, for example, a woven fabric, a non-woven fabric, a mesh, a porous body, or a combination thereof can be used.
【００２２】水蒸気選択透過膜の形態としては平膜状で
も中空糸、チューブ状いずれでも用いることができる。
また図１のように、水蒸気選択透過膜を２枚張り合せて
入口１ａ、出口１ｂを有する封筒状体１を作り、スペー
サー２を配置して巻き込んでモジュール３を作り、封筒
状体の内部に濃縮すべき水溶液を流通させ、封筒体の外
部に外気４を導入して、水溶液中の水分を水蒸気選択透
過膜を介して外気側に移行（移動）させるようにしても
よい。この場合モジュールの製作が簡単であり、装置も
コンパクトにできる。The form of the water vapor permselective membrane may be flat membrane, hollow fiber or tube.
In addition, as shown in FIG. 1, two water vapor selective permeable membranes are bonded to each other to form an envelope 1 having an inlet 1a and an outlet 1b, a spacer 2 is arranged and wound to form a module 3, and the envelope 3 is placed inside the envelope. The aqueous solution to be concentrated may be circulated, the outside air 4 may be introduced to the outside of the envelope, and the moisture in the aqueous solution may be transferred (moved) to the outside air side through the water vapor selective permeable membrane. In this case, the module can be easily manufactured and the device can be made compact.
【００２３】[0023]
【実施例】テトラフルオロエチレンとＣＦ2 ＝ＣＦＯＣ
Ｆ2 ＣＦ（ＣＦ3 ）ＯＣＦ2 ＣＦ2 ＳＯ2 Ｆとを共重合
せしめてイオン交換容量１．１０ミリ当量／ｇ樹脂の共
重合体Ａを得た。この共重合体を水酸化カリウム水溶液
で加水分解後、塩酸で処理し末端を−ＳＯ3 Ｈに交換し
た共重合体Ｂを得た。共重合体Ｂとエタノールをオート
クレーブに入れ、加熱攪拌し、共重合体Ｂの１０重量％
の含フッ素系イオン交換樹脂エタノール溶液を得た。EXAMPLES Tetrafluoroethylene and CF 2 = CFOC
F 2 CF (CF 3 ) OCF 2 CF 2 SO 2 F was copolymerized to obtain a copolymer A having an ion exchange capacity of 1.10 meq / g resin. After hydrolyzing the copolymer in an aqueous potassium hydroxide solution, to obtain a copolymer B replacing the ends were treated with hydrochloric acid to -SO 3 H. Copolymer B and ethanol were placed in an autoclave, heated and stirred, and 10% by weight of copolymer B was added.
A fluorine-containing ion exchange resin ethanol solution was obtained.
【００２４】この溶液をポリテトラフルオロエチレン
（ＰＴＦＥ）製フィルムの上に液膜厚１００μｍでキャ
ストし、その後、恒温槽中で６０℃、５分の条件で乾燥
し５μｍの厚みの含フッ素系イオン交換樹脂の薄膜を得
た。さらにその上に１００μｍの厚みで前述の溶液を更
にキャストしエタノールが蒸散する前に素早く１００μ
ｍの厚みのＰＴＦＥ多孔体をのせ含フッ素系イオン交換
樹脂薄膜とＰＴＦＥ多孔体を積層しその後同様な条件で
乾燥し水蒸気選択透過膜を得た。This solution was cast on a polytetrafluoroethylene (PTFE) film with a liquid film thickness of 100 μm, and then dried in a constant temperature bath at 60 ° C. for 5 minutes to give a fluorine-containing ion having a thickness of 5 μm. A thin film of exchange resin was obtained. On top of that, further cast the above solution with a thickness of 100 μm to quickly make 100 μm before the ethanol evaporates.
A PTFE porous body having a thickness of m was placed, a fluorine-containing ion exchange resin thin film and a PTFE porous body were laminated, and then dried under the same conditions to obtain a water vapor selective permeable membrane.
【００２５】このようにして得た、幅２０ｃｍ、長さ
２．５ｍの水蒸気選択透過膜を２枚張り合せて有効面積
１ｍ2 の封筒状体１をつくり、スペーサー２を配置し巻
き込んで、図１のような直径約１０ｃｍのモジュール３
にした。封筒状体１の内部に０．５Ｎの硝酸溶液１０リ
ットルを４０℃に加熱してポンプで循環させ、また外気
４を４０℃に加熱しながら流速５ｍ／秒で導入した。こ
のような条件で５時間連続運転を行い、その後硝酸溶液
の濃度を測定したところ１．８Ｎまで濃度が上昇した。
この時外気温度は２０℃、相対湿度は５０％であった。The thus obtained two water vapor selective permeable membranes having a width of 20 cm and a length of 2.5 m are laminated to form an envelope 1 having an effective area of 1 m 2 , and a spacer 2 is arranged and rolled up. Module 3 with a diameter of about 10 cm like 1
I made it. Into the inside of the envelope body 1, 10 liters of a 0.5N nitric acid solution was heated to 40 ° C. and circulated by a pump, and the outside air 4 was introduced at a flow rate of 5 m / sec while being heated to 40 ° C. The continuous operation was carried out for 5 hours under such conditions, and then the concentration of the nitric acid solution was measured. As a result, the concentration increased to 1.8N.
At this time, the outside air temperature was 20 ° C. and the relative humidity was 50%.
【００２６】[0026]
【発明の効果】請求項１に記載の発明では、水溶液を濃
縮するにあたり、水溶液を水蒸気選択透過膜の一方の面
側に導入し、他方の面側に搬送気体を導入し、水蒸気選
択透過膜を介して水溶液中の水分を搬送気体に移動させ
ることにより水溶液を濃縮するので、大掛かりな装置を
必要とせず、濃縮の対象となる水溶液の範囲も広く、し
かも経済効率が高い。According to the first aspect of the invention, in concentrating the aqueous solution, the aqueous solution is introduced into one surface side of the water vapor selective permeable membrane and the carrier gas is introduced into the other surface side of the water vapor selective permeable membrane. Since the aqueous solution is concentrated by moving the water in the aqueous solution to the carrier gas via the, the large-scale apparatus is not required, the range of the aqueous solution to be concentrated is wide, and the economic efficiency is high.
【００２７】請求項２に記載の発明では、搬送気体とし
て外気を用いるので、大がかりな装置を必要とせず、低
圧ファン等で導入でき、過大なエネルギーを必要としな
い。According to the second aspect of the invention, since the outside air is used as the carrier gas, a large-scale device is not required, it can be introduced by a low-pressure fan or the like, and excessive energy is not required.
【００２８】請求項３に記載の発明では、導入した水溶
液又は搬送気体の両方又は一方を気温より５℃以上加熱
するので、水蒸気の透過速度が低下することなく安定し
た濃縮操作ができる。According to the third aspect of the present invention, both or one of the introduced aqueous solution and carrier gas is heated to 5 ° C. or more from the ambient temperature, so that a stable concentration operation can be performed without lowering the water vapor transmission rate.
【００２９】請求項４に記載の発明では、水蒸気選択透
過膜がパ−フルオロスルホン酸系陽イオン交換膜より形
成されているので、強度、水蒸気透過性、、耐薬品性、
コストの点で優れている。In the invention according to claim 4, since the water vapor selective permeable membrane is formed of a perfluorosulfonic acid type cation exchange membrane, strength, water vapor permeability, chemical resistance,
Excellent in terms of cost.
【００３０】請求項５に記載の発明では、水蒸気選択透
過膜からなる、入口と出口を有する封筒状体にスぺーサ
ーを配置し、封筒状体の外側にスぺーサーを配置して巻
き込んだ構成のモジュ−ルを用いているので、濃縮操作
が効率よくでき、モジュールは作るのが簡単で装置を小
型にできる。In the invention according to claim 5, the spacer is arranged in the envelope having the inlet and the outlet, which is composed of the water vapor selective permeable membrane, and the spacer is arranged outside the envelope to be wound. Since the module having the structure is used, the concentration operation can be performed efficiently, the module is easy to make, and the device can be made compact.
【図１】本発明の水溶液の濃縮方法の一例を説明する略
示図ある。FIG. 1 is a schematic view illustrating an example of a method for concentrating an aqueous solution of the present invention.
１ 水蒸気選択透過膜からなる封筒状体 １ａ 入口 １ｂ 出口 ２ スぺーサー ３ モジュ−ル ４ 外気 1 Envelopes made of water vapor selective permeable membrane 1a Inlet 1b Outlet 2 Spacer 3 Module 4 Outside air
Claims (5)
気選択透過膜の一方の面側に導入し、水蒸気選択透過膜
の他方の面側に搬送気体を導入して、水蒸気選択透過膜
を介して水溶液中の水分を搬送気体側に移行させること
により水溶液を濃縮することを特徴とする水溶液の濃縮
方法。1. When concentrating an aqueous solution, the aqueous solution is introduced to one surface side of a water vapor selective permeable membrane, and a carrier gas is introduced to the other surface side of the water vapor selective permeable membrane to pass through the water vapor selective permeable membrane. A method for concentrating an aqueous solution, which comprises concentrating the aqueous solution by transferring water in the aqueous solution to a carrier gas side.
する請求項１に記載の水溶液の濃縮方法。2. The method for concentrating an aqueous solution according to claim 1, wherein outside air is used as the carrier gas.
一方を気温より５℃以上加熱することを特徴とする請求
項１又は２に記載の水溶液の濃縮方法。3. The method for concentrating an aqueous solution according to claim 1, wherein both or one of the aqueous solution to be concentrated and the carrier gas are heated to 5 ° C. or more from the ambient temperature.
酸系陽イオン交換膜であることを特徴とする請求項１〜
３のいずれか１つに記載の水溶液の濃縮方法。4. The water vapor selective permeable membrane is a perfluorosulfonic acid type cation exchange membrane.
4. The method for concentrating an aqueous solution according to any one of 3.
有する封筒状体をスぺーサーを配置して巻き込んでなる
モジュ−ルの、封筒状体の内部に水溶液を通過させ、封
筒状体の外部に搬送気体を導入して水溶液中の水分を水
蒸気選択透過膜を介して搬送気体側に移行させることに
より水溶液を濃縮することを特徴とする請求項１〜４の
いずれか１つに記載の水溶液の濃縮方法。5. An envelope-shaped body comprising a moisture-vapor selective permeable membrane and having an inlet and an outlet and having a spacer disposed therein to allow an aqueous solution to pass through the inside of the envelope-shaped body. 5. The aqueous solution is concentrated by introducing a carrier gas to the outside of the container to transfer water in the aqueous solution to the carrier gas side through a water vapor selective permeable membrane. Method for concentrating aqueous solution of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18195594A JPH0824585A (en) | 1994-07-12 | 1994-07-12 | Concentration method of aqueous solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18195594A JPH0824585A (en) | 1994-07-12 | 1994-07-12 | Concentration method of aqueous solution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0824585A true JPH0824585A (en) | 1996-01-30 |
Family
ID=16109800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18195594A Pending JPH0824585A (en) | 1994-07-12 | 1994-07-12 | Concentration method of aqueous solution |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0824585A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006159177A (en) * | 2004-11-10 | 2006-06-22 | Mitsubishi Heavy Ind Ltd | Waste water treatment device, waste water treatment system, waste water treatment method and waste water recycling method |
| JP2008194570A (en) * | 2007-02-09 | 2008-08-28 | Mebiol Kk | Continuous condensing system and condensing method |
| WO2018230566A1 (en) * | 2017-06-12 | 2018-12-20 | Ａｇｃエンジニアリング株式会社 | Humidification module and method for humidification of fluid using said humidification module |
-
1994
- 1994-07-12 JP JP18195594A patent/JPH0824585A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006159177A (en) * | 2004-11-10 | 2006-06-22 | Mitsubishi Heavy Ind Ltd | Waste water treatment device, waste water treatment system, waste water treatment method and waste water recycling method |
| JP2008194570A (en) * | 2007-02-09 | 2008-08-28 | Mebiol Kk | Continuous condensing system and condensing method |
| WO2018230566A1 (en) * | 2017-06-12 | 2018-12-20 | Ａｇｃエンジニアリング株式会社 | Humidification module and method for humidification of fluid using said humidification module |
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