JP2000167357A - Concentrator for surfactant-containing solution - Google Patents
Concentrator for surfactant-containing solutionInfo
- Publication number
- JP2000167357A JP2000167357A JP10350060A JP35006098A JP2000167357A JP 2000167357 A JP2000167357 A JP 2000167357A JP 10350060 A JP10350060 A JP 10350060A JP 35006098 A JP35006098 A JP 35006098A JP 2000167357 A JP2000167357 A JP 2000167357A
- Authority
- JP
- Japan
- Prior art keywords
- storage tank
- liquid
- solution
- liquid storage
- surfactant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Degasification And Air Bubble Elimination (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、界面活性剤を含む
溶液を濃縮する装置に属する。[0001] The present invention relates to an apparatus for concentrating a solution containing a surfactant.
【０００２】[0002]
【従来の技術】界面活性剤を含む溶液を濃縮するとき、
通常膜モジュールと貯液槽とを備えた濃縮装置が使用さ
れる。この種の濃縮装置はいわゆるバッチ方式により運
転され、原理は以下の通りである。2. Description of the Related Art When a solution containing a surfactant is concentrated,
Usually, a concentrating device having a membrane module and a storage tank is used. This type of concentrator is operated by a so-called batch method, and the principle is as follows.
【０００３】濃縮前の界面活性剤溶液は一旦貯液槽に供
給された後、ポンプ等にて膜モジュールに供給され透過
液と濃縮液とに分離される。透過液は装置外へ排出さ
れ、濃縮液の一部又は全部は貯液槽に戻される。戻され
た濃縮液は、槽内に新たに供給された濃縮前溶液と混ざ
り合いながら、再び膜モジュールに供給され、濃縮され
た後に貯液槽に戻される。そして、これが繰り返される
ことにより、貯液槽内の界面活性剤の濃度が高くなり、
規定の濃度に達した後に一部又は全部が次工程に送られ
る。[0003] A surfactant solution before concentration is once supplied to a storage tank, and then supplied to a membrane module by a pump or the like to be separated into a permeate and a concentrate. The permeate is discharged out of the apparatus, and part or all of the concentrate is returned to the storage tank. The returned concentrated liquid is supplied to the membrane module again while being mixed with the pre-concentration solution newly supplied into the tank, and is returned to the liquid storage tank after being concentrated. And by repeating this, the concentration of the surfactant in the liquid storage tank increases,
After reaching the specified concentration, part or all is sent to the next step.
【０００４】ここで、短時間で効率よく濃縮するために
は、貯液槽内の液量が一定に保たれるように、溶液の貯
液槽への供給量と透過液量を調節しなければならない。
そのため従来より、貯液槽には液面計などの液量測定手
段が設置されている。そして、液量が変化したときに
は、この液量測定手段によって検知されて、各流量が適
当に調節される。Here, in order to concentrate efficiently in a short time, the supply amount of the solution to the storage tank and the permeated liquid amount must be adjusted so that the liquid amount in the storage tank is kept constant. Must.
Therefore, conventionally, a liquid amount measuring means such as a liquid level gauge is provided in the liquid storage tank. Then, when the liquid amount changes, it is detected by the liquid amount measuring means, and each flow rate is appropriately adjusted.
【０００５】[0005]
【発明が解決しようとする課題】しかし、従来の濃縮装
置では、貯液槽内で泡が発生する。なぜなら、界面活性
剤を含む溶液が泡立ちやすい性質をもつからであり、そ
の上、膜モジュールにより高圧下で濃縮する際に溶液に
溶け込んだ空気が貯液槽内で大気圧に戻るため、泡の発
生が促進されるからである。However, in the conventional concentration device, bubbles are generated in the liquid storage tank. This is because the solution containing the surfactant has a property of easily bubbling, and furthermore, when the membrane module condenses under high pressure, the air dissolved in the solution returns to the atmospheric pressure in the storage tank, so that the foam This is because the occurrence is promoted.
【０００６】貯液槽内で泡が発生すると、溶液が膜モジ
ュールへ供給されにくくなる。さらに、液量測定手段と
して液面計を用いている場合には、泡により液面の高さ
を正確に検知できなくなり、そのため貯液槽内の液量を
制御できなくなる。また、液量測定手段として差圧伝送
式の重量計を用いると、測定は正確にされるが、泡が貯
液槽外に流出する怖れがある。なお、泡の発生を抑える
手段として消泡剤を添加することを考えられるが、効果
が小さく、溶液の用途によっては添加できない場合もあ
るので、適切な手段とは言えない。[0006] When bubbles are generated in the liquid storage tank, it becomes difficult to supply the solution to the membrane module. Further, when a liquid level meter is used as the liquid amount measuring means, the height of the liquid surface cannot be accurately detected due to bubbles, and therefore, the liquid amount in the liquid storage tank cannot be controlled. When a differential pressure transmission type weighing scale is used as the liquid amount measuring means, the measurement is performed accurately, but there is a fear that bubbles may flow out of the liquid storage tank. As a means for suppressing the generation of bubbles, it is conceivable to add an antifoaming agent. However, the effect is small and it may not be possible to add the solution depending on the use of the solution.
【０００７】それ故、本発明の目的は、貯液槽内での泡
の発生を抑制することができる濃縮装置を提供すること
にある。[0007] Therefore, an object of the present invention is to provide a concentrating device capable of suppressing the generation of bubbles in a liquid storage tank.
【０００８】[0008]
【課題を解決するための手段】本発明の濃縮装置は、界
面活性剤を含む溶液を濃縮する膜モジュールと、液量を
測定する手段と、これにより液量が制御されながら前記
溶液が貯められる貯液槽とを備え、前記貯液槽より前記
溶液を前記膜モジュールに供給し、濃縮した後に濃縮液
を再び前記貯液槽に戻す濃縮装置において、前記貯液槽
の液面に向けて溶液に対して不活性な気体を噴射する手
段が更に備えられていることを特徴としている。According to the present invention, there is provided a concentrating apparatus comprising: a membrane module for concentrating a solution containing a surfactant; a means for measuring a liquid amount; and the solution is stored while controlling the liquid amount. A liquid storage tank, wherein the solution is supplied to the membrane module from the liquid storage tank, and after concentration, the concentrated liquid is returned to the liquid storage tank again. And a means for injecting an inert gas with respect to the air.
【０００９】本発明の濃縮装置では、貯液槽に液面に向
けて気体を噴射する手段が設けられている。そのため、
界面活性剤を含む溶液を濃縮している間、貯液槽内に貯
められる溶液の液面に空気等の気体を噴射することによ
り、泡の発生が抑制され、あるいは発生しても瞬時に消
される。In the concentrating device of the present invention, a means for injecting gas toward the liquid surface is provided in the liquid storage tank. for that reason,
By injecting gas such as air onto the surface of the solution stored in the storage tank while the solution containing the surfactant is concentrated, the generation of bubbles is suppressed, or even if it is generated, it is instantaneously erased. It is.
【００１０】液量を測定する手段としては、例えば、電
極式、フロート式等の溶液と接触するタイプの液面計、
超音波式、光学式等の溶液と接触しないタイプの液面
計、又は重量計などが挙げられる。ただし、溶液と接触
するタイプの液面計では付着した溶液が不使用時に固化
してしまうこと、重量計は高価であることを考慮する
と、溶液と接触しないタイプの液面計が最も好ましい。As means for measuring the liquid amount, for example, an electrode type, a float type or the like, a liquid level meter of a type which comes into contact with a solution,
An ultrasonic type, an optical type, a liquid level meter which does not come into contact with a solution, a weighing scale, and the like can be given. However, in view of the fact that the adhering solution solidifies when not in use and the weighing scale is expensive, a liquid level meter that does not come in contact with the solution is most preferable.
【００１１】膜モジュールの型式については特に限定は
なく、例えば、中空型、スパイラル型、平膜型、管状型
などがある。また、使用され得る分離膜としては、逆浸
透膜、ナノろ過膜がある。分離膜の材質については、界
面活性剤に対して耐性を有するものであれば、特に限定
はない。例えば、ポリスルホン系、ポリエーテルスルホ
ン系、ポリビニルアルコール系、ポリオレフィン系、ポ
リアクリロニトリル系、ポリアミド系の材質が挙げられ
る。The type of the membrane module is not particularly limited, and examples thereof include a hollow type, a spiral type, a flat type, and a tubular type. Separation membranes that can be used include reverse osmosis membranes and nanofiltration membranes. The material of the separation membrane is not particularly limited as long as it has resistance to a surfactant. For example, polysulfone, polyethersulfone, polyvinyl alcohol, polyolefin, polyacrylonitrile, and polyamide materials can be used.
【００１２】[0012]
【発明の実施の形態】本発明の実施形態を図１とともに
述べる。図１は、本実施形態の濃縮装置を説明するフロ
ー図である。本実施形態の濃縮装置では、以下のように
して界面活性剤溶液が濃縮される。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. FIG. 1 is a flowchart illustrating the concentration device of the present embodiment. In the concentration device of the present embodiment, the surfactant solution is concentrated as follows.
【００１３】まず、濃縮前の界面活性剤溶液（供給液）
が供給配管１から流量計２を介して貯液槽３に供給され
る。続いて、供給ポンプ４によって汲み上げられ、プレ
フィルター５でろ過された後、加圧ポンプ６に供給され
る。次に、加圧ポンプ６によって昇圧されてから、逆浸
透膜モジュール８に供給され、透過液１１と濃縮液１０
とに分離される。透過液１１は流量計１３を介して装置
外に排出され、濃縮液１０は貯液槽３に戻される。さら
に、戻された濃縮液１０は、貯液槽３に新たに加えられ
た供給液とともに、再び供給ポンプ４、プレフィルター
５及び加圧ポンプ６を経由して、逆浸透膜モジュール８
に供給される。そして、逆浸透膜モジュール８により得
られた濃縮液１０は再び貯液槽３に戻される。本実施形
態の濃縮装置では、このように濃縮液１０が循環しなが
ら貯液槽３内で界面活性剤の濃度が徐々に高まってい
く。なお、図１において符号７、９、１２は圧力計を示
す。First, a surfactant solution (supply liquid) before concentration
Is supplied from the supply pipe 1 to the liquid storage tank 3 via the flow meter 2. Subsequently, after being pumped up by the supply pump 4 and filtered by the pre-filter 5, it is supplied to the pressurizing pump 6. Next, the pressure is increased by the pressure pump 6 and then supplied to the reverse osmosis membrane module 8, where the permeate 11 and the concentrate 10
And separated. The permeated liquid 11 is discharged out of the apparatus via the flow meter 13, and the concentrated liquid 10 is returned to the storage tank 3. Further, the returned concentrated solution 10 is again supplied to the reverse osmosis membrane module 8 via the supply pump 4, the prefilter 5 and the pressurizing pump 6 together with the supply liquid newly added to the storage tank 3.
Supplied to Then, the concentrated liquid 10 obtained by the reverse osmosis membrane module 8 is returned to the liquid storage tank 3 again. In the concentration device of the present embodiment, the concentration of the surfactant gradually increases in the storage tank 3 while the concentrate 10 circulates in this manner. In FIG. 1, reference numerals 7, 9 and 12 indicate pressure gauges.
【００１４】濃縮液１０の循環は、濃縮倍率が予め設定
した値に達するまで繰り返される。濃縮倍率は、流量計
２及び流量計１３によりそれぞれ計測される供給液量及
び透過液量の各積算量から求められる。これらの関係
は、濃縮倍率＝（供給液積算量）／（供給液積算量−透
過液積算量）のようになっている。また、濃縮中に貯液
槽３内の液量を一定に保つために、貯液槽３の天井内壁
には超音波式液面計１４が設置されている。さらに、貯
液槽３内には空気シャワー器１５が設けられており、濃
縮中に貯液槽３内の溶液の液面に向けて空気が連続的に
噴射される。そのため、本実施形態の濃縮装置では、貯
液槽３内における泡の発生が抑制される。The circulation of the concentrate 10 is repeated until the concentration ratio reaches a preset value. The concentration magnification is determined from the integrated amounts of the supply liquid amount and the permeate amount measured by the flow meter 2 and the flow meter 13, respectively. These relationships are as follows: concentration ratio = (integrated amount of supply liquid) / (integrated amount of supply liquid−integrated amount of permeate). Further, an ultrasonic liquid level gauge 14 is provided on the inner wall of the ceiling of the liquid storage tank 3 in order to keep the liquid amount in the liquid storage tank 3 constant during the concentration. Further, an air shower 15 is provided in the liquid storage tank 3, and air is continuously jetted toward the liquid surface of the solution in the liquid storage tank 3 during concentration. Therefore, in the concentration device of the present embodiment, generation of bubbles in the liquid storage tank 3 is suppressed.
【００１５】[0015]
【実施例】上記実施形態の濃縮装置を用いて、陰イオン
界面活性剤を２％含む水溶液を８倍に濃縮する試験を行
った。ここで、逆浸透膜モジュール８は２本使用され、
また貯液槽３の容量は５ｍ3である。その他の条件は以
下の通りである。EXAMPLES Using the concentrating apparatus of the above embodiment, a test for concentrating an aqueous solution containing 2% of an anionic surfactant eight times was conducted. Here, two reverse osmosis membrane modules 8 are used,
The capacity of the liquid storage tank 3 is 5 m 3 . Other conditions are as follows.
【００１６】（１）逆浸透膜モジュール８の仕様 製造元：日東電工株式会社 型式：スパイラル型、膜面積３７ｃｍ2 品番：ＥＳ２０−Ｄ８ 材質：ポリアミド （２）超音波式液面計１４の仕様 製造元：（株）ノーケン（超音波レベル計ＱＳシリー
ズ） （３）運転条件 透過液量：１２０Ｌ／ｈ モジュール入口圧力：１．５〜２．０Ｍｐａ （４）空気シャワー器１５の条件 圧力：０．３ｋｇｆ／ｃｍ2 流量：５００Ｌ／ｍｉｎ（２０℃）(1) Specifications of reverse osmosis membrane module 8 Manufacturer: Nitto Denko Corporation Model: spiral type, membrane area 37 cm 2 Part number: ES20-D8 Material: Polyamide (2) Specifications of ultrasonic level gauge 14 Manufacturer: (3) Operating conditions Permeate volume: 120 L / h Module inlet pressure: 1.5 to 2.0 Mpa (4) Condition of air shower 15 Pressure: 0.3 kgf / cm 2 flow rate: 500 L / min (20 ° C.)
【００１７】試験の結果、濃縮中に貯液槽３内で泡の発
生は認められなかった。よって、貯液槽３内の溶液は逆
浸透膜モジュール８に安定して供給された。また、貯液
槽３内の液量は、超音波式液面計１４によって正確に測
定され、一定に保たれた。As a result of the test, no bubbles were observed in the storage tank 3 during the concentration. Therefore, the solution in the storage tank 3 was stably supplied to the reverse osmosis membrane module 8. The liquid volume in the liquid storage tank 3 was accurately measured by the ultrasonic liquid level gauge 14 and kept constant.
【００１８】[0018]
【発明の効果】本発明の濃縮装置によると、泡の発生を
抑制することができる。したがって、溶液が膜モジュー
ルへ安定して供給される。また、貯液槽内の液量が正確
に測定され、制御される。According to the concentrating device of the present invention, generation of bubbles can be suppressed. Therefore, the solution is stably supplied to the membrane module. Further, the liquid amount in the liquid storage tank is accurately measured and controlled.
【図１】本発明の濃縮装置を説明するフロー図である。FIG. 1 is a flowchart illustrating a concentrator according to the present invention.
１ 供給配管 ２、１３ 流量計 ３ 貯液槽 ４ 供給ポンプ ５ プレフィルター ６ 加圧ポンプ ７、９、１２ 圧力計 ８ 逆浸透膜モジュール １０ 濃縮液 １１ 透過液 １４ 超音波式液面計 １５ 空気シャワー器 REFERENCE SIGNS LIST 1 supply pipe 2, 13 flow meter 3 storage tank 4 supply pump 5 prefilter 6 pressurizing pump 7, 9, 12 pressure gauge 8 reverse osmosis membrane module 10 concentrated solution 11 permeate 14 ultrasonic level gauge 15 air shower vessel
フロントページの続き Ｆターム(参考） 4D006 GA03 GA07 HA01 HA21 HA41 HA61 KA02 KA62 KB14 KB17 KE02P KE03P KE07P KE08P KE09P KE30Q MA01 MA02 MA03 MB11 MC22 MC33 MC39 MC54X MC62 MC63 PA03 PB12 PB70 4D011 BA03 Continued on the front page F term (reference) 4D006 GA03 GA07 HA01 HA21 HA41 HA61 KA02 KA62 KB14 KB17 KE02P KE03P KE07P KE08P KE09P KE30Q MA01 MA02 MA03 MB11 MC22 MC33 MC39 MC54X MC62 MC63 PA03 PB12 PB70 4D011 BA03
Claims (2)
ールと、液量を測定する手段と、これによって液量が制
御されながら前記溶液が貯められる貯液槽とを備え、前
記貯液槽より前記溶液を前記膜モジュールに供給し、濃
縮した後に濃縮液を再び前記貯液槽に戻す濃縮装置にお
いて、 前記貯液槽の液面に向けて溶液に対して不活性な気体を
噴射する手段が更に備えられていることを特徴とする濃
縮装置。1. A liquid storage tank comprising: a membrane module for concentrating a solution containing a surfactant; means for measuring a liquid amount; and a liquid storage tank for storing the solution while the liquid amount is being controlled by the liquid crystal tank. A concentrating device for supplying the solution to the membrane module and returning the concentrated solution to the storage tank again after concentration, wherein a means for injecting an inert gas to the solution toward the liquid surface of the storage tank Is further provided.
濃縮装置。2. The concentrator according to claim 1, wherein the gas is air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10350060A JP2000167357A (en) | 1998-12-09 | 1998-12-09 | Concentrator for surfactant-containing solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10350060A JP2000167357A (en) | 1998-12-09 | 1998-12-09 | Concentrator for surfactant-containing solution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000167357A true JP2000167357A (en) | 2000-06-20 |
Family
ID=18407963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10350060A Pending JP2000167357A (en) | 1998-12-09 | 1998-12-09 | Concentrator for surfactant-containing solution |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000167357A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007117980A (en) * | 2005-10-26 | 2007-05-17 | Kazuyuki Ogawa | Ultrafiltration apparatus |
| JP2010284133A (en) * | 2009-06-15 | 2010-12-24 | Nippon Rensui Co Ltd | Method for producing purified sugar solution |
| JP2010284134A (en) * | 2009-06-15 | 2010-12-24 | Nippon Rensui Co Ltd | Method for producing purified sugar solution |
-
1998
- 1998-12-09 JP JP10350060A patent/JP2000167357A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007117980A (en) * | 2005-10-26 | 2007-05-17 | Kazuyuki Ogawa | Ultrafiltration apparatus |
| JP2010284133A (en) * | 2009-06-15 | 2010-12-24 | Nippon Rensui Co Ltd | Method for producing purified sugar solution |
| JP2010284134A (en) * | 2009-06-15 | 2010-12-24 | Nippon Rensui Co Ltd | Method for producing purified sugar solution |
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