JPH05317729A - Method for regenerating of ion-exchange resin and plant therefor - Google Patents
Method for regenerating of ion-exchange resin and plant thereforInfo
- Publication number
- JPH05317729A JPH05317729A JP4128848A JP12884892A JPH05317729A JP H05317729 A JPH05317729 A JP H05317729A JP 4128848 A JP4128848 A JP 4128848A JP 12884892 A JP12884892 A JP 12884892A JP H05317729 A JPH05317729 A JP H05317729A
- Authority
- JP
- Japan
- Prior art keywords
- exchange resin
- regenerant
- anion exchange
- regeneration
- tower
- 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.)
- Granted
Links
Landscapes
- Treatment Of Water By Ion Exchange (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は火力発電所あるいは原子
力発電所等の復水を処理する復水脱塩装置のイオン交換
樹脂の再生方法及び再生設備に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and equipment for regenerating ion exchange resin in a condensate demineralizer for treating condensate in a thermal power plant, a nuclear power plant or the like.
【０００２】[0002]
【従来技術】一般に、火力発電所あるいは原子力発電所
の復水を処理する復水脱塩装置は、複数の通水塔と一系
列の再生設備とから構成されている。2. Description of the Related Art Generally, a condensate demineralizer for treating condensate of a thermal power plant or a nuclear power plant comprises a plurality of water towers and a series of regeneration equipment.
【０００３】すなわち複数の通水塔で復水を処理し、そ
の内の一塔の通水塔の圧力損失が増加したり、あるいは
その処理水純度が低下したり、あるいは定収量に達した
際に、当該通水塔内の使用済のイオン交換樹脂（カチオ
ン交換樹脂とアニオン交換樹脂の混合樹脂）を再生設備
に移送すると共に、再生設備ですでに再生して貯留して
いる再生済混合樹脂を前記通水塔に充填して通水を再開
したりあるいは再生設備ですでに再生した再生済混合樹
脂をあらかじめ充填してあるスタンバイの通水塔を通水
に切り換え、一方、再生設備に移送された前記使用済混
合樹脂を再生して次回の通水に備えるように設けられて
いる。That is, when condensate is treated by a plurality of water flow towers and the pressure loss of one of the water flow towers increases, the purity of the treated water decreases, or a fixed yield is reached, The used ion exchange resin (mixed resin of cation exchange resin and anion exchange resin) in the water tower is transferred to the regenerator, and the regenerated mixed resin already regenerated and stored in the regenerator is transferred to the regenerator. The water tower is filled into the water tower to resume water flow, or the standby water tower that has been pre-filled with the regenerated mixed resin that has already been regenerated in the regeneration equipment is switched to water passage, while the used water transferred to the regeneration equipment is used. It is provided to regenerate the mixed resin and prepare for the next water passage.
【０００４】このような復水脱塩装置に用いられる再生
設備としては種々のものがあるが、例えば、一塔内でカ
チオン交換樹脂とアニオン交換樹脂を上下の層に分離し
た後順次に再生処理を行う一塔式の再生方式、あるい
は、これらのカチオン交換樹脂とアニオン交換樹脂を別
々の塔に分離してから再生する二塔式の再生方式などが
知られていて、実際に適用されている。There are various regenerators used in such a condensate demineralizer. For example, a cation exchange resin and an anion exchange resin are separated into upper and lower layers in one tower, and then regenerated sequentially. A one-tower type regeneration system for performing the above or a two-tower type regeneration system for separating the cation exchange resin and the anion exchange resin into separate columns and then regenerating them is known and actually applied. ..
【０００５】そして、これらのいずれの再生方式におい
ても、再生処理後のイオン交換樹脂を通水塔に戻して復
水処理をする際のイオン除去率を向上させる等の目的で
種々の提案が従来からなされており、本出願人も、例え
ば一塔式の再生法に関する特公昭５８−２０３１２号の
方法、二塔式の再生法に関する実公平３−５３７５８号
の方法などを提案している。In any of these regeneration systems, various proposals have heretofore been made for the purpose of, for example, improving the ion removal rate when returning the ion-exchange resin after the regeneration treatment to the water tower to perform the condensate treatment. The present applicant has also proposed, for example, the method of Japanese Patent Publication No. 58-20312 relating to the one-tower type regeneration method and the method of Japanese Utility Model Publication No. 3-53758 regarding the two-tower type regeneration method.
【０００６】[0006]
【発明が解決しようとする課題】ところで上記のような
復水処理の方法や設備については、より一層の改善が求
められており、特に処理水質の向上については、上記の
提案をしている本出願人も更に鋭意研究・開発を重ねて
いる。By the way, there is a demand for further improvement in the above-mentioned condensate treatment method and equipment, and in particular, regarding the improvement of treated water quality, the book proposed above is proposed. The applicant is also continuing diligent research and development.
【０００７】そしてその過程で、従来全く試みられるこ
とがなかった操作を行なうことで、処理水の水質を飛躍
的に向上できることを本発明者等は知見した。In the process, the present inventors have found that the quality of treated water can be dramatically improved by performing an operation that has never been attempted.
【０００８】本発明はまさにこのような知見に基づいて
なされたものであり、復水脱塩装置の処理水水質を向上
できる再生方法を提供することを目的とする。The present invention has been made on the basis of such knowledge, and an object thereof is to provide a regeneration method capable of improving the quality of treated water in a condensate desalination apparatus.
【０００９】本発明の別の目的は、上記の再生法を適用
することができるイオン交換樹脂の再生設備を提供する
ところにある。Another object of the present invention is to provide an ion exchange resin regenerating facility to which the above regenerating method can be applied.
【００１０】[0010]
【課題を解決するための手段及び作用】本発明者は、上
記の目的を達成するために上記特許請求の範囲の各請求
項に記載した方法及び装置の発明を完成した。The present inventor has completed the invention of a method and an apparatus as set forth in each of the claims for attaining the above object.
【００１１】本発明の再生法の特徴の一つは、一塔内で
カチオン交換樹脂層の上部に分離させたアニオン交換樹
脂層に対し、該層の上部からアルカリ再生剤を通液する
と共に該層の下部から再生廃液を塔外に抜いてアニオン
交換樹脂を再生する一塔式の再生法において、塔内を満
水状態にすることなく、アニオン交換樹脂層の上面まで
常に再生剤で浸すことができる薄い再生剤の液層を該ア
ニオン交換樹脂層の上部に維持しながら、再生剤の通液
を行なうところにある。One of the features of the regeneration method of the present invention is that the alkali regenerant is passed from the upper part of the cation exchange resin layer separated in the upper part of the cation exchange resin layer in one tower, and In the one-column type regeneration method in which the waste regenerated liquid is drained from the lower part of the layer to the outside of the tower to regenerate the anion exchange resin, it is possible to constantly immerse the upper surface of the anion exchange resin layer with the regenerant without filling the inside of the tower with water. The liquid of the regenerant is passed through while maintaining a thin liquid layer of the regenerant that is formed above the anion exchange resin layer.
【００１２】上記においてアニオン交換樹脂層の上に維
持するアルカリ再生剤の液層は、該アニオン交換樹脂を
常に再生剤で浸すという条件を満足する限り、できるだ
け薄いことが好ましい。限定されるものではないが一般
的には液面の変動等を考慮してアニオン交換樹脂層の上
面から２０〜４０ｃｍ程度の範囲に液面レベルを設定す
るのが好ましい場合が多い。In the above description, the liquid layer of the alkaline regenerant maintained on the anion exchange resin layer is preferably as thin as possible, as long as the condition that the anion exchange resin is constantly immersed in the regenerant is satisfied. Although not limited, in general, it is often preferable to set the liquid surface level within a range of about 20 to 40 cm from the upper surface of the anion exchange resin layer in consideration of the fluctuation of the liquid surface.
【００１３】この一塔式の再生法においては、アルカリ
再生剤としてカ性ソーダのみを用いる方法、更にアンモ
ニア循環を用いる方法、のいずれを用いてもよい。In the one-column regeneration method, either a method using only caustic soda as the alkali regenerating agent or a method using ammonia circulation may be used.
【００１４】再生剤の塔内への供給位置は、限定される
ものではないが上記再生剤の液面近傍から行うのが好ま
しい場合が多い。The position of supplying the regenerant into the tower is not limited, but it is often preferable to supply it from near the liquid surface of the regenerant.
【００１５】本発明の方法は、アニオン交換樹脂及びカ
チオン交換樹脂を一つの塔内で再生処理する上記の一塔
式再生法だけでなく、これらの樹脂を別の塔に分離して
再生処理を行なういわゆる二塔式再生法にも同様に適用
できるものであり、アニオン交換樹脂の再生処理につい
ては、一塔式，二塔式による区別は特にない。The method of the present invention is not limited to the above-described one-column type regeneration method in which an anion exchange resin and a cation exchange resin are regenerated in one column, but these resins are separated into another column for regeneration treatment. It can be similarly applied to a so-called two-column type regeneration method, and there is no particular distinction between the one-column type and the two-column type regarding the regeneration treatment of the anion exchange resin.
【００１６】上記の一塔式あるいは二塔式の再生法にお
いて、もう一つの樹脂であるカチオン交換樹脂の再生
は、本発明のアニオン交換樹脂の再生法により制限を受
けることはなく、従来の方法をそのまま適用して行うこ
とができる。In the above-mentioned one-column type or two-column type regeneration method, the regeneration of the other resin, the cation exchange resin, is not limited by the regeneration method of the anion exchange resin of the present invention. Can be applied as is.
【００１７】本発明の方法を一塔式の再生塔内のアニオ
ン交換樹脂に対して行う場合には、カチオン交換樹脂の
再生との関係において更にいくつかの工夫された方法を
採用することが好ましく推奨される。When the method of the present invention is carried out on the anion exchange resin in the single-column regeneration tower, it is preferable to employ some methods devised in relation to the regeneration of the cation exchange resin. Recommended.
【００１８】例えば、アニオン交換樹脂に対するアルカ
リ再生剤の通液を行う場合には、これに先立って、例え
ば逆洗分離法により混合イオン交換樹脂を分離するため
に導入された水で満水状態となっている再生塔内の塔頂
から空気を流入し、アニオン交換樹脂層の下部付近に設
置されている液抜き手段（通常、コレクター）からアニ
オン交換樹脂層のやや上方までの水を塔外に押出す操作
を行うが、この操作において水を抜くと同時に、アニオ
ン交換樹脂の再生処理において一般に脱離促進のために
加温して用いているアルカリ再生剤の温度とほぼ等しい
温水を流入し、水抜きの終了時においてアニオン交換樹
脂層上方に存在する水および気体部の温度をアルカリ再
生剤の温度とほぼ同じようにしておくことが好ましい。
これは、本発明のアニオン交換樹脂の再生法において
は、再生塔内の上部に気相（空気）領域が形成されるた
め、再生処理の途中で塔内の温度変化があるとこの気相
部分の膨張や収縮が生じ易くなり、アニオン交換樹脂層
の上部に安定な高さで維持しようとしているアルカリ再
生剤液層の液面レベル維持に不都合となるから、その影
響を低減する上で効果がある。For example, when the alkali regenerant is passed through the anion exchange resin, prior to this, the water introduced for separating the mixed ion exchange resin by a backwash separation method is filled with water. The air flows in from the top of the regeneration tower, and the water from the liquid draining means (usually a collector) installed near the bottom of the anion exchange resin layer to a little above the anion exchange resin layer is pushed out of the tower. The water is drained in this operation, and at the same time when the anion exchange resin is regenerated, warm water that is almost the same as the temperature of the alkaline regenerant that is heated to accelerate desorption is used to flow in the water. It is preferable that the temperature of the water and the gas portion existing above the anion exchange resin layer at the end of the withdrawal be set to be substantially the same as the temperature of the alkali regenerant.
This is because in the regeneration method of the anion exchange resin of the present invention, a gas phase (air) region is formed in the upper part of the regeneration tower, and therefore, if there is a temperature change in the tower during the regeneration treatment, this gas phase portion Is likely to expand and contract, which is inconvenient for maintaining the liquid level of the alkaline regenerant liquid layer that is to be maintained at a stable height above the anion exchange resin layer, which is effective in reducing the effect. is there.
【００１９】また、一塔内でカチオン交換樹脂層の上部
に分離させたアニオン交換樹脂層に対して上記本発明の
アニオン交換樹脂の再生法を行った後、カチオン交換樹
脂層に対し酸再生剤を通液してカチオン交換樹脂の再生
を行う再生法においては、酸再生剤の通液によってカチ
オン交換樹脂が収縮するため上部境界面が変動し易くな
る。そこでこのような変動の影響を抑制し、酸再生剤の
安定な通液状態を保つ操作が求められる。このような操
作としては、例えばカチオン交換樹脂層に対する酸再生
剤の通液量と上部のアニオン交換樹脂層に対する水の通
液量をバランス調整する方法も可能であるが、容易な方
法として、アニオン交換樹脂層から塔頂までを水で満水
状態とさせて行う方法が推奨される。After the anion exchange resin layer separated above the cation exchange resin layer in one tower is regenerated from the anion exchange resin of the present invention, an acid regenerant is added to the cation exchange resin layer. In the regeneration method in which the cation exchange resin is regenerated by passing the solution through the solution, the cation exchange resin contracts due to the passing of the acid regenerant, so that the upper boundary surface is likely to change. Therefore, there is a demand for an operation that suppresses the influence of such fluctuations and maintains a stable liquid passing state of the acid regenerant. As such an operation, for example, it is possible to balance the amount of the acid regenerant passed through the cation exchange resin layer and the amount of water passed through the upper anion exchange resin layer. It is recommended to fill the area from the exchange resin layer to the top of the tower with water.
【００２０】一塔式の再生法においては、アニオン交換
樹脂の再生処理後、該アニオン交換樹脂とカチオン交換
樹脂を再度上下に分離する再分離操作を行なってから、
下部のカチオン交換樹脂層の再生を行うことも、再生率
をより一層向上させる上で好ましい。In the one-column type regeneration method, after the anion exchange resin is regenerated, a re-separation operation of separating the anion exchange resin and the cation exchange resin into upper and lower parts is performed again, and then,
Regeneration of the lower cation exchange resin layer is also preferable in order to further improve the regeneration rate.
【００２１】本発明の方法によりアニオン交換樹脂を再
生した混合イオン交換樹脂を使用した復水脱塩塔におい
て、従来の再生法からは考えられないほどの優れた性能
が発揮される理由は必ずしも明らかではないが、本発明
法と従来法の対比等からすると、従来法では何等かの理
由で再生後のアニオン交換樹脂と共に微小量のアルカリ
再生剤が通水塔に持ち込まれていたのに対し、本発明法
ではこのようなアルカリ再生剤の通水塔への持ち込みが
大幅に減少するためと推定される。通水塔へのアルカリ
再生剤持ち込みが生ずる原因としては、従来法では、再
生塔内を満水状態にして再生を行っているためアルカリ
再生剤が塔内壁等あるいは塔内部材に付着残留し易く、
その洗い流しが不十分となり易いことなどが考えられ
る。The reason why the condensate demineralization tower using the mixed ion exchange resin in which the anion exchange resin is regenerated by the method of the present invention exhibits excellent performance that is unthinkable in the conventional regeneration method is not always clear. However, in comparison with the method of the present invention and the conventional method, in the conventional method, a small amount of the alkali regenerant was brought into the water tower together with the anion exchange resin after regeneration for some reason. It is presumed that in the inventive method, the amount of such alkali regenerant brought into the water tower is significantly reduced. As a cause of bringing the alkali regenerant into the water tower, in the conventional method, since the regenerator is filled with water and regenerated, the alkali regenerator easily adheres to and remains on the inner wall of the tower or members inside the tower,
It can be considered that the washing out tends to be insufficient.
【００２２】本発明はまた、以上の方法を実施するため
に用いられるイオン交換樹脂の再生設備を提供すること
をもう一つの特徴とする。Another feature of the present invention is to provide a facility for regenerating an ion exchange resin used for carrying out the above method.
【００２３】すなわち、二塔式の再生法が適用される本
発明の再生設備の特徴は、アニオン交換樹脂がカチオン
交換樹脂とは分離して充填される再生塔と、該再生塔内
のアニオン交換樹脂層に対してアルカリ再生剤を通液す
る再生剤通液手段とを備え、上記再生剤通液手段とし
て、アニオン交換樹脂層に対してその上方から再生剤を
供給する再生剤供給手段と、該アニオン交換樹脂層の上
方一定高の位置に該再生剤の液面高さを維持するための
液面レベル維持手段と、該アニオン交換樹脂層の下部か
ら再生廃液を塔外に抜き出す手段とを有する構成に設け
たところにある。また一塔式の再生法が適用される本発
明の再生設備の特徴は、アニオン交換樹脂とカチオン交
換樹脂を順次に再生するための一塔式の再生塔と、該再
生塔内のアニオン交換樹脂とカチオン交換樹脂をこの再
生塔内で上下の層に分離させる樹脂分離手段と、該再生
塔内で分離した上層のアニオン交換樹脂層に対してアル
カリ再生剤を通液する第１の再生剤通液手段と、該再生
塔内で分離した下部のカチオン交換樹脂層に対して酸再
生剤を通液する第２の再生剤通液手段とを備え、上記第
１の再生剤通液手段として、アニオン交換樹脂層に対し
その上方から再生剤を供給する再生剤供給手段と、該層
の上方一定高の位置に該再生剤の液面高さを維持するた
めの液面レベル維持手段と、該層の下部から再生廃液を
塔外に抜き出す手段とを有する構成に設けたところにあ
る。That is, the characteristics of the regeneration equipment of the present invention to which the two-column type regeneration method is applied are that the anion exchange resin is charged separately from the cation exchange resin, and the anion exchange in the regeneration tower is performed. A regenerant liquid passage means for passing an alkali regenerant into the resin layer, and as the regenerant liquid passage means, a regenerant supply means for supplying a regenerant to the anion exchange resin layer from above, A liquid level maintaining means for maintaining the liquid level of the regenerant at a fixed height above the anion exchange resin layer, and a means for extracting the regeneration waste liquid from the lower part of the anion exchange resin layer to the outside of the tower. It is in the place where it has been provided. The characteristic of the regeneration equipment of the present invention to which the one-column type regeneration method is applied is that the one-column type regeneration tower for sequentially regenerating anion exchange resin and cation exchange resin, and the anion exchange resin in the regeneration tower. And a cation exchange resin in the regeneration tower to separate into upper and lower layers, and a first regenerant for passing an alkali regenerant into the upper anion exchange resin layer separated in the regeneration tower. A liquid means and a second regenerant liquid passage means for passing an acid regenerant to the lower cation exchange resin layer separated in the regeneration tower, and the first regenerant liquid passage means, A regenerant supply means for supplying a regenerant to the anion exchange resin layer from above, a liquid level maintaining means for maintaining the liquid level of the regenerant at a constant height above the layer, and And means for withdrawing recycled waste liquid from the bottom of the bed to the outside of the tower In the place provided.
【００２４】上記のいずれの設備においても、アニオン
交換樹脂層の上方から再生剤を供給する再生剤供給手段
（ディストリビュータ）は、一定高さに維持される再生
剤の液面レベル近傍に設けることが好ましい。In any of the above facilities, the regenerant supply means (distributor) for supplying the regenerant from above the anion exchange resin layer is provided near the liquid level of the regenerant maintained at a constant height. preferable.
【００２５】上記において、アルカリ再生剤の液面を略
一定の高さに維持する手段としては、アニオン交換樹脂
層の下部から塔外に再生廃液を抜き出すコレクタ配管の
出口を、上記の液面付近まで立ち上げた後大気に開放す
る形式、液面の上下位置に例えばレベルスイッチＬＳ
H ，ＬＳL を夫々設けると共にコレクタ配管に該レベル
スイッチと連動する弁を設けて、ＬＳH のオンで弁を
開、ＬＳL のオンで弁を閉とする形式、液面指示調節計
ＬＩＣによってコレクタ配管の途中に設けたコントロー
ル弁の開度を調節する形式、などを例示できるが特にこ
れらに限定されるものではない。In the above, as a means for maintaining the liquid level of the alkali regenerant at a substantially constant height, the outlet of the collector pipe for withdrawing the regeneration waste liquid from the lower part of the anion exchange resin layer to the outside of the tower is provided near the above liquid level. Type that opens to the atmosphere after starting up to the upper and lower positions of the liquid level, such as the level switch LS
H and LS L are provided respectively, and a valve interlocking with the level switch is provided in the collector pipe. The valve is opened when LS H is turned on, and the valve is closed when LS L is turned on. A form in which the opening of a control valve provided in the middle of the collector pipe is adjusted can be exemplified, but the form is not particularly limited thereto.
【００２６】[0026]
【実施例】以下図面に示す実施例に基づいて本発明を更
に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be further described based on the embodiments shown in the drawings.
【００２７】実施例１ 図１は、一塔式のイオン交換樹脂の再生設備の実施例を
示すものであり、主要な装置として、再生塔３と樹脂貯
槽８を有する。Example 1 FIG. 1 shows an example of a one-column type ion-exchange resin regeneration facility, which has a regeneration column 3 and a resin storage tank 8 as main devices.
【００２８】この設備の詳細を操作手順にしたがって以
下説明すると、まず脱塩塔１１の使用済混合イオン交換
樹脂が、樹脂移送管１０を介し移送されて再生塔３内に
充填される。そして空気等で充分にスクラビングして酸
化鉄等のクラツドを水流で当該再生塔３外に排出した
後、当該再生塔３下部から上昇流の逆洗水を流入して両
イオン交換樹脂を充分に膨張・分離させ、次いで該逆洗
水の流入を止めて沈整することにより、両イオン交換樹
脂の沈降速度の差を利用して下層にカチオン交換樹脂層
Ｃ、上層にアニオン交換樹脂層Ａを形成させる。１３は
これらの上下の層Ａ，Ｃの分離面を示している。The details of this equipment will be described below in accordance with the operating procedure. First, the used mixed ion exchange resin of the desalting tower 11 is transferred through the resin transfer pipe 10 and filled in the regeneration tower 3. Then, after sufficiently scrubbing with air or the like to discharge the clod of iron oxide or the like with a water flow out of the regeneration tower 3, an upward flow of backwash water is introduced from the lower portion of the regeneration tower 3 to sufficiently remove both ion exchange resins. The cation exchange resin layer C is formed in the lower layer and the anion exchange resin layer A is formed in the upper layer by swelling and separating, and then stopping the inflow of the backwash water to settle the mixture, thereby utilizing the difference in the sedimentation rate of both ion exchange resins. Let it form. Reference numeral 13 denotes a separation surface of these upper and lower layers A and C.
【００２９】次に、再生塔３においてアニオン交換樹脂
の再生を次のようにして行う。Next, in the regeneration tower 3, the anion exchange resin is regenerated as follows.
【００３０】すなわち、上記のように上下２層にイオン
交換樹脂が分離された状態で、洗浄水・空気配管６から
ディストリビュータ７を介して空気を導入することによ
り、塔内に満水している水をレベルスイッチ１５を設置
した液面１４のレベルまで水抜きする。この際、後述の
再生処理で使用するアルカリ再生剤の温度（例えば６０
℃）とほぼ同じ温度の水をＮａＯＨ通薬配管１から流入
しながら水抜きを行うことが好ましい。That is, in the state where the ion exchange resin is separated into the upper and lower two layers as described above, air is introduced from the washing water / air pipe 6 through the distributor 7 to fill the water in the tower. Is drained to the level of the liquid surface 14 on which the level switch 15 is installed. At this time, the temperature of the alkaline regenerant used in the regeneration treatment described later (for example, 60
It is preferable to drain water while flowing in water having a temperature substantially the same as that of (° C.) From the NaOH common pipe 1.
【００３１】次に、アルカリ再生剤としてのＮａＯＨ液
を、ＮａＯＨ通薬配管１をからデイストリビユータ２を
介して上層のアニオン交換樹脂層Ａの上部より通液し、
一方下層のカチオン交換樹脂層ＣにＮａＯＨ液が入り込
むことを防止するために、Ｈ2 ＳＯ4 通薬配管４から上
向流で支持水を供給しながら、アニオン交換樹脂層Ａの
下部に設置しているコレクター５から再生廃液及び支持
水を押し出す。Next, a NaOH solution as an alkali regenerant is passed from the upper portion of the anion exchange resin layer A, which is the upper layer, through the NaOH passage pipe 1 and the distributor 2.
On the other hand, in order to prevent the NaOH solution from entering the lower cation exchange resin layer C, it is installed at the lower part of the anion exchange resin layer A while supplying the supporting water in an upward flow from the H 2 SO 4 common pipe 4. The recycled waste liquid and supporting water are pushed out from the collector 5 that is installed.
【００３２】そして本例のアニオン交換樹脂のこの再生
処理における特徴として、コレクター５からの廃液配管
１６を、一度上記液面１４の高さまで立ち上げた後大気
に開放し、廃液配管１７で系外に排出するようにしてい
ることにある。１８はこの大気開放部を示している。こ
のような廃液配管１６の立ち上げと大気開放により、デ
ィストリビュータ２から供給されるＮａＯＨ液の液面１
４は図示位置に保たれることになる。A feature of this regeneration treatment of the anion exchange resin of the present example is that the waste liquid pipe 16 from the collector 5 is once raised to the level of the liquid level 14 and then opened to the atmosphere, and the waste liquid pipe 17 is used outside the system. Is to be discharged to. Reference numeral 18 shows this atmosphere opening portion. By the rise of the waste liquid pipe 16 and opening to the atmosphere, the liquid level 1 of the NaOH liquid supplied from the distributor 2
4 will be kept in the position shown.
【００３３】この後、通薬を終了して液面を保ったまま
塔内の再生剤を洗い出し、エア抜き配管９から空気を抜
きながら塔内を水で満水状態とした後、洗浄を行ってア
ニオン交換樹脂の再生処理を終了する。After this, the regenerant in the tower was washed out while the liquid flow was completed and the liquid level was maintained, and the tower was filled with water while bleeding air from the air vent pipe 9, and then washed. The regeneration treatment of the anion exchange resin is completed.
【００３４】次に、下層のカチオン交換樹脂Ｃの再生の
ために、常法に従って、Ｈ2 ＳＯ4通薬配管４から酸再
生剤であるＨ2 ＳＯ4 の通液すると共に上方から支持水
を流してコレクター５から抜き出す。この際、コレクタ
ー５からの廃液配管１６のバルブ１９，２０を切り換え
て、大気開放部を介することなくバルブ２０を介して再
生廃液および支持水を流出させる。Next, for the regeneration of the lower cation exchange resin C, according to a conventional method, the supporting water from above as well as liquid permeability of H 2 SO 4 is an acid regenerant from H 2 SO 4 copies drug pipe 4 Pour and remove from collector 5. At this time, the valves 19 and 20 of the waste liquid pipe 16 from the collector 5 are switched to allow the regeneration waste liquid and the supporting water to flow out through the valve 20 without passing through the atmosphere opening portion.
【００３５】通薬後、塔内の再生剤を洗い出し洗浄を行
ってカチオン交換樹脂の再生処理を終了する。After the passage of the chemical, the regenerant in the tower is washed out and washed to complete the regeneration treatment of the cation exchange resin.
【００３６】以上の両樹脂の再生処理が終了したイオン
交換樹脂は、樹脂移送配管３０を介して樹脂貯槽８に送
られる。なお前回の再生処理を行って該樹脂貯槽８に貯
留されていた混合樹脂は、事前に、脱塩塔１１に樹脂移
送配管３１を介して送られる。The ion-exchange resin after the above-described regeneration treatment of both resins is sent to the resin storage tank 8 through the resin transfer pipe 30. The mixed resin stored in the resin storage tank 8 after the previous regeneration processing is sent to the desalting tower 11 via the resin transfer pipe 31 in advance.
【００３７】なお、アニオン交換樹脂の再生処理後、カ
チオン交換樹脂の再生処理に先立って、再生塔３の下部
から逆洗水を通水して、アニオン交換樹脂とカチオン交
換樹脂の再分離を行うこともでき、これによりアニオン
交換樹脂層中に微量残留しているカチオン交換樹脂がカ
チオン交換樹脂層側に移行するので、より再生率が向上
する利点がある。After the regeneration treatment of the anion exchange resin, prior to the regeneration treatment of the cation exchange resin, backwash water is passed from the lower part of the regeneration tower 3 to re-separate the anion exchange resin and the cation exchange resin. It is also possible to do so, and the cation exchange resin that remains in a trace amount in the anion exchange resin layer migrates to the cation exchange resin layer side, so there is an advantage that the regeneration rate is further improved.
【００３８】以上のような本例の設備で行われるイオン
交換樹脂の再生法は、アニオン交換樹脂の再生処理の操
作において、塔内を満水状態とせずに液面レベルを十分
に低く保つ点で従来法と異なるのみであるが、以下の試
験例で説明するように、処理水のＮａイオン量が著しく
低減する効果が得られる利点がある。The regeneration method of the ion exchange resin carried out in the equipment of this example as described above is that the liquid level is kept sufficiently low without filling the inside of the column with water in the operation of the regeneration treatment of the anion exchange resin. Although only different from the conventional method, there is an advantage that the effect of significantly reducing the amount of Na ions in the treated water can be obtained as described in the following test examples.
【００３９】実施例２ 図２は、従来一般的な二塔式のイオン交換樹脂の再生設
備に本発明を適用した実施例を示すものであり、分離と
カチオン交換樹脂の再生を行う分離兼カチオン交換樹脂
再生塔１０１と、混合樹脂受け入れ槽１０２と、アニオ
ン交換樹脂再生塔１０３と、必要に応じて設けられる樹
脂貯槽１０４とからなっている。Example 2 FIG. 2 shows an example in which the present invention is applied to a conventional general two-column type ion exchange resin regeneration facility, in which separation and cation exchange resin regeneration are performed. It is composed of an exchange resin regeneration tower 101, a mixed resin receiving tank 102, an anion exchange resin regeneration tower 103, and a resin storage tank 104 provided as necessary.
【００４０】この図２に示す設備においては、まず樹脂
移送管１０５を介して図示しない通水塔から移送される
使用済混合樹脂を、混合樹脂受け入れ槽１０２内の使用
済混合樹脂と共に分離兼カチオン交換樹脂再生塔１０１
内に入れ、スクラビングによる酸化鉄等のクラツド除
去、上向き逆洗、逆洗停止沈整によるカチオン交換樹脂
層Ｃとアニオン交換樹脂層Ａの形成の後、両イオン交換
樹脂の分離境界面１０８より上方の少量のアニオン交換
樹脂１０７ａ（斜線で示した）を残留させて、他の大部
分のアニオン交換樹脂１０７を樹脂移送管１０９を用い
てアニオン交換樹脂再生塔１０３に移送し、次いで残留
させた少量のアニオン交換樹脂１０７ａと、分離境界面
１０８より下方の少量のカチオン交換樹脂１０６ａ（斜
線で示した）とを樹脂移送管１１０を用いて混合樹脂受
け入れ槽１０２に移送する。In the equipment shown in FIG. 2, first, the used mixed resin transferred from a water tower (not shown) via the resin transfer pipe 105 is separated and cation exchanged together with the used mixed resin in the mixed resin receiving tank 102. Resin regeneration tower 101
After the formation of the cation exchange resin layer C and the anion exchange resin layer A by removing the clads such as iron oxides by scrubbing, upward backwashing, and backwash stop and settling, above the separation boundary surface 108 of both ion exchange resins. A small amount of the anion exchange resin 107a (shown by diagonal lines) is left, and most of the other anion exchange resin 107 is transferred to the anion exchange resin regeneration tower 103 using the resin transfer pipe 109, and then the remaining small amount Of the anion exchange resin 107a and a small amount of the cation exchange resin 106a (shown by diagonal lines) below the separation boundary surface 108 are transferred to the mixed resin receiving tank 102 using the resin transfer pipe 110.
【００４１】そして、このような移送が終了した後、分
離兼カチオン交換樹脂再生塔１０１においては酸再生剤
通薬配管１１１、デイストリビユータ１１２を介して酸
再生剤を通薬し、次いで押し出し、洗浄を行い、常法に
よりカチオン交換樹脂１０６を再生する一方、アニオン
交換樹脂再生塔１０３においては、アルカリ再生剤通薬
管１１３、デイストリビユータ１１４等を用いて、実施
例１と同様のアニオン交換樹脂１０７の再生法を実施す
る。このアニオン交換樹脂の再生法が異なる他は、従来
通常の二塔式再生法の操作が行われる。After such transfer is completed, in the separation / cation exchange resin regeneration tower 101, the acid regenerant is passed through the acid regenerant feed pipe 111 and the distributor 112, and then extruded. While washing is performed to regenerate the cation exchange resin 106 by an ordinary method, in the anion exchange resin regeneration tower 103, an alkali regenerant feed pipe 113, a distributor 114, etc. are used to perform the same anion exchange as in Example 1. A method of regenerating the resin 107 is carried out. Besides the difference in the method of regenerating the anion exchange resin, the operation of the conventional ordinary two-column regenerating method is performed.
【００４２】なお、アニオン交換樹脂の再生処理のため
の各装置及び操作は、実施例１と同様であるので、各装
置を図示（アニオン交換樹脂の再生処理のための各装置
の番号は図１と共通）するのみで説明は省略する。Since each device and operation for regenerating the anion exchange resin are the same as in Example 1, each device is shown in the figure (the number of each device for regenerating the anion exchange resin is shown in FIG. 1). Common) and the description is omitted.
【００４３】以上の各塔毎の再生処理が終了した後、分
離兼カチオン交換樹脂再生塔１０１内の再生済のカチオ
ン交換樹脂１０６を樹脂移送管１１５を用いて樹脂貯槽
１０４に移送するとともに、アニオン交換樹脂再生塔１
０３内の再生済のアニオン交換樹脂１０７を樹脂移送管
１１６を用いて樹脂貯槽１０４に移送し、移送後、両イ
オン交換樹脂を充分に混合して再生済の混合樹脂として
貯留する。After the above-described regeneration treatment for each tower is completed, the regenerated cation exchange resin 106 in the separation / cation exchange resin regeneration tower 101 is transferred to the resin storage tank 104 using the resin transfer pipe 115, and the anion Exchange resin regeneration tower 1
The regenerated anion exchange resin 107 in 03 is transferred to the resin storage tank 104 using the resin transfer pipe 116, and after the transfer, both ion exchange resins are sufficiently mixed and stored as a regenerated mixed resin.
【００４４】試験例１ 図１の装置を使用して実施例１の方法に従い、イオン交
換樹脂の再生処理を行った。主な処理の条件は以下の通
りである。Test Example 1 Using the apparatus of FIG. 1, the ion exchange resin was regenerated according to the method of Example 1. The main processing conditions are as follows.
【００４５】再生塔の容量：１０ｍ3 アニオン交換樹脂 種類：アンバーライト（登録商標）ＩＲＡ−９００ 量 ：１５００リットル カチオン交換樹脂 種類：アンバーライト（登録商標）２００ＣＴ 量 ：３０００リットル アニオン樹脂再生処理 再生剤（６０℃，７％ＮａＯＨ）をＳＶ７で２０分間通
液した。同時に塔下部から純水をＳＶ７で通水した。液
面はアニオン交換樹脂上面から約３００ｍｍに維持し
た。通薬終了後、ＮａＯＨの洗い出しを行い、塔内を満
水状態にして約ＳＶ２４で洗浄を行った。Regeneration tower capacity: 10 m 3 Anion exchange resin Type: Amberlite (registered trademark) IRA-900 Amount: 1500 liters Cation exchange resin type: Amberlite (registered trademark) 200CT Amount: 3000 liters Anion resin regeneration treatment Regenerant (60 ° C., 7% NaOH) was passed through SV7 for 20 minutes. At the same time, pure water was passed from the bottom of the tower with SV7. The liquid surface was maintained at about 300 mm from the upper surface of the anion exchange resin. After the completion of the passage, NaOH was washed out, the inside of the tower was filled with water, and the column was washed with about SV24.
【００４６】カチオン交換樹脂の再生処理 塔内を満水状態としたまま、再生剤（５％Ｈ2 ＳＯ4 ）
をＳＶ４で４０分間通液した。同時に塔上部から純水を
ＳＶ７で通水した。通薬終了後、Ｈ2 ＳＯ4の洗い出し
を行い、約ＳＶ２４で洗浄を行った。Regeneration treatment of cation exchange resin With the inside of the tower filled with a regenerant (5% H 2 SO 4 )
Was passed through SV4 for 40 minutes. Simultaneously, pure water was passed by SV7 from the upper part of the tower. After the completion of the drug delivery, H 2 SO 4 was washed out and washed with about SV24.
【００４７】以上の再生処理を行ったイオン交換樹脂を
樹脂貯槽８に移送して貯留後、脱塩塔１１に送って起動
準備を行い、起動時とその後の採水時の、脱塩塔処理水
のＮａイオン濃度を測定した。その結果を下記表１に示
した。The ion-exchange resin that has been subjected to the above-described regeneration treatment is transferred to the resin storage tank 8 and stored therein, and then sent to the desalting tower 11 to prepare for start-up, and the treatment of the desalting tower at start-up and subsequent water sampling The Na ion concentration of water was measured. The results are shown in Table 1 below.
【００４８】試験例２ アニオン交換樹脂の再生処理の後、カチオン交換樹脂の
再生処理を行うに先立って、塔下部よりＬＶ８で純水を
通水して逆洗分離を再び行った他は、試験例１と同様の
イオン交換樹脂の再生処理を行い、再生処理を行ったイ
オン交換樹脂を樹脂貯槽８を経て脱塩塔に送り、起動時
とその後の採水時の脱塩塔処理水のＮａイオン濃度を測
定し、その結果を下記表１に示した。Test Example 2 Tests were carried out except that after the anion exchange resin was regenerated, the cation exchange resin was regenerated and pure water was passed from the bottom of the column at LV8 to carry out backwash separation again. The ion-exchange resin was regenerated in the same manner as in Example 1, and the regenerated ion-exchange resin was sent to the desalting tower through the resin storage tank 8, and Na of the desalination tower-treated water at the time of start-up and subsequent water sampling was used. The ion concentration was measured, and the results are shown in Table 1 below.
【００４９】試験例３ 比較のために、図１の装置を使用して、アニオン交換樹
脂の再生処理に先立つエア導入による水抜きを行わずに
塔内を満水状態とした従来法によるアニオン股間樹脂の
再生処理を行った他は、試験例１と同様のイオン交換樹
脂の再生処理を行い、再生処理を行ったイオン交換樹脂
を樹脂貯槽８を経て脱塩塔に送り、起動時とその後の採
水時の脱塩塔処理水のＮａイオン濃度を測定し、その結
果を下記表１に示した。Test Example 3 For comparison, using the apparatus of FIG. 1, the anion crotch resin according to the conventional method was used in which the inside of the tower was filled with water without draining water by introducing air prior to the regeneration treatment of the anion exchange resin. The same ion exchange resin as in Test Example 1 was used, except that the ion exchange resin thus treated was sent to the desalting tower through the resin storage tank 8 at the time of start-up and after that. The Na ion concentration of the desalting tower treated water when water was measured, and the results are shown in Table 1 below.
【００５０】[0050]
【表１】 [Table 1]
【００５１】この表１の結果から明らかであるように、
脱塩塔処理水のＮａイオン濃度は、従来法による場合に
比べて、本発明法による再生処理を行った場合に極めて
優れた再生状態となっていることが確認される。As is clear from the results shown in Table 1,
It is confirmed that the Na ion concentration in the desalting tower treated water is in an extremely excellent regeneration state when the regeneration treatment according to the present invention is carried out, as compared with the case where the conventional method is employed.
【００５２】[0052]
【発明の効果】本発明によれば、復水脱塩装置で使用さ
れたイオン交換樹脂、特にアニオン交換樹脂を再生する
にあたり、満水状態とせずに、アニオン交換樹脂層の上
部に薄い再生剤の液層を形成させながらアルカリ再生剤
を通液することで、処理水質の大幅な向上を実現できる
という効果がある。According to the present invention, when regenerating an ion exchange resin used in a condensate demineralizer, particularly an anion exchange resin, a thin regenerant is added to the upper part of the anion exchange resin layer without being filled with water. By passing the alkali regenerant while forming the liquid layer, there is an effect that the quality of treated water can be significantly improved.
【００５３】また本発明の方法は、得られる効果が極め
て大きいにも拘らず、従来の再生方法に比べても操作そ
れ自体の変更は極めて簡単という特徴があり、既存の設
備への適用や、従来からある設計基準の変更を容易に実
現できるという実施面での優れた効果がある。In addition, the method of the present invention is characterized in that the operation itself is extremely easy to change as compared with the conventional regeneration method, even though the obtained effect is extremely large. There is an excellent effect in terms of implementation that the change of the existing design standard can be easily realized.
【００５４】また本発明は、上記の再生法を適用するこ
とができるイオン交換樹脂の再生設備を容易に提供でき
るという効果もある。The present invention also has the effect of easily providing a facility for regenerating an ion exchange resin to which the above-mentioned regeneration method can be applied.
【図１】本発明を一塔式のイオン交換樹脂再生設備に適
用した場合の構成概要一例を示した図、FIG. 1 is a diagram showing an example of a schematic configuration when the present invention is applied to a one-column type ion-exchange resin regeneration facility,
【図２】本発明を二塔式のイオン交換樹脂再生設備に適
用した場合の構成概要一例を示した図である。FIG. 2 is a diagram showing an example of a schematic configuration when the present invention is applied to a two-column type ion exchange resin regeneration facility.
１・・・ＮａＯＨ通薬配管、２・・・ディストリビュー
タ、３・・・再生塔、４・・・Ｈ2 ＳＯ4 通薬配管、５
・・・コレクター、６・・・洗浄水・空気供給配管、７
・・・ディストリビュータ、８・・・樹脂貯槽、９・・
・エア抜き配管、１１・・・脱塩塔、１４・・・液面、
１５・・・レベルスイッチ、１８・・・大気開放部、１
９、２０・・・バルブ。1 ... NaOH fuel pipe, 2 ... Distributor, 3 ... Regeneration tower, 4 ... H 2 SO 4 fuel pipe, 5
... Collector, 6 ... Cleaning water / air supply piping, 7
... Distributor, 8 ... Resin storage tank, 9 ...
・ Air bleeding pipe, 11 ... desalting tower, 14 ... liquid level,
15 ... Level switch, 18 ... Atmosphere opening part, 1
9, 20 ... Valve.
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成５年６月２日[Submission date] June 2, 1993
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】図２[Name of item to be corrected] Figure 2
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図２】 [Fig. 2]
Claims (6)
離させたアニオン交換樹脂層に対し、又は、カチオン交
換樹脂とは別の塔に分離させたアニオン交換樹脂層に対
し、該層の上部からアルカリ再生剤を通液すると共に該
層の下部から再生廃液を塔外に抜いてアニオン交換樹脂
を再生する方法において、塔内を満水状態とせずに、ア
ニオン交換樹脂層の上面まで常に再生剤で浸すことがで
きる薄い再生剤の液層を該アニオン交換樹脂層の上部に
維持しながら、上記通液を行なうことを特徴とするイオ
ン交換樹脂の再生法。1. An anion exchange resin layer separated in an upper part of a cation exchange resin layer in one tower, or an anion exchange resin layer separated in a tower different from the cation exchange resin layer, In the method of regenerating the anion exchange resin by draining the regeneration waste liquid from the lower part of the layer while passing the alkali regenerant from the upper part, the regeneration is always performed up to the upper surface of the anion exchange resin layer without filling the inside of the column with full water. A method for regenerating an ion exchange resin, characterized in that the above-mentioned liquid passing is carried out while maintaining a thin liquid layer of a regenerant that can be dipped with the agent above the anion exchange resin layer.
離させたアニオン交換樹脂層に対し上方からアルカリ再
生剤を通液しながら該層の下部から再生廃液を抜く請求
項１のアニオン交換樹脂の再生法を行った後、アニオン
交換樹脂とカチオン交換樹脂を再度上下に分離する再分
離操作を行なうか又は行なわずに、下部に分離したカチ
オン交換樹脂層に対し酸再生剤を通液してカチオン交換
樹脂の再生を行うことを特徴とするイオン交換樹脂の再
生方法。2. Anion exchange according to claim 1, wherein the waste regenerated liquid is drained from the lower part of the anion exchange resin layer separated in the upper part of the cation exchange resin layer in one tower while the alkaline regenerant is passed from above. After carrying out the resin regeneration method, the acid regenerant is passed through the cation exchange resin layer separated at the bottom, with or without the re-separation operation of separating the anion exchange resin and the cation exchange resin up and down again. A method for regenerating an ion exchange resin, characterized in that a cation exchange resin is regenerated.
に対する酸再生剤の通液は、アニオン交換樹脂層から塔
頂まで水を満水状態にして行なうことを特徴とするイオ
ン交換樹脂の再生方法。3. The method for regenerating an ion exchange resin according to claim 2, wherein the acid regenerant is passed through the cation exchange resin layer by filling the water from the anion exchange resin layer to the top of the column with water.
分離して充填される再生塔と、該再生塔内のアニオン交
換樹脂層に対してアルカリ再生剤を通液する再生剤通液
手段とを備えたイオン交換樹脂の二塔式再生設備におい
て、上記再生剤通液手段は、アニオン交換樹脂層に対し
てその上方から再生剤を供給する再生剤供給手段と、該
アニオン交換樹脂層の上方一定高の位置に該再生剤の液
面高さを維持するための液面レベル維持手段と、該アニ
オン交換樹脂層の下部から再生廃液を塔外に抜き出す手
段とを有することを特徴とするイオン交換樹脂の再生設
備。4. A regenerator, in which an anion exchange resin is separately filled from a cation exchange resin, and a regenerant liquid passing means for passing an alkali regenerant into the anion exchange resin layer in the regenerator. In the double tower type regeneration equipment of the ion exchange resin, the regenerant liquid passage means is a regenerant supply means for supplying the regenerant to the anion exchange resin layer from above, and a fixed height above the anion exchange resin layer. An ion exchange resin, characterized by having a liquid level maintaining means for maintaining the liquid level of the regenerant at the position of, and a means for extracting the regeneration waste liquid from the lower part of the anion exchange resin layer to the outside of the tower. Reproduction equipment.
順次に再生するための一塔式の再生塔と、該再生塔内の
アニオン交換樹脂とカチオン交換樹脂をこの再生塔内で
上下の層に分離させる樹脂分離手段と、該再生塔内で分
離した上層のアニオン交換樹脂層に対してアルカリ再生
剤を通液する第１の再生剤通液手段と、該再生塔内で分
離した下部のカチオン交換樹脂層に対して酸再生剤を通
液する第２の再生剤通液手段とを備えたイオン交換樹脂
の一塔式再生設備において、上記第１の再生剤通液手段
は、アニオン交換樹脂層に対しその上方から再生剤を供
給する再生剤供給手段と、該層の上方一定高の位置に該
再生剤の液面高さを維持するための液面レベル維持手段
と、該層の下部から再生廃液を塔外に抜き出す手段とを
有することを特徴とするイオン交換樹脂の再生設備。5. A one-column type regeneration tower for sequentially regenerating an anion exchange resin and a cation exchange resin, and anion exchange resin and cation exchange resin in the regeneration tower are separated into upper and lower layers in the regeneration tower. Resin separating means, a first regenerant liquid passing means for passing an alkali regenerant through the upper anion exchange resin layer separated in the regeneration tower, and a lower cation exchange portion separated in the regeneration tower. In a single-column regeneration facility for ion exchange resin, comprising a second regenerant liquid passage means for passing an acid regenerant through the resin layer, the first regenerant liquid passage means is an anion exchange resin layer. The regenerant supply means for supplying the regenerant from above, liquid level maintaining means for maintaining the liquid level of the regenerant at a position above the layer, and from the bottom of the layer. And a means for extracting the recycled waste liquid to the outside of the tower. Ion exchange resin recycling facility.
樹脂層に対してその上方から再生剤を供給する再生剤供
給手段が、液面レベル維持手段によって維持される再生
剤の液面レベル近傍に設けられていることを特徴とする
イオン交換樹脂の再生設備。6. The regenerant supply means for supplying a regenerant from above to the anion exchange resin layer according to claim 4 or 5, in the vicinity of the liquid level of the regenerant maintained by the liquid level maintaining means. An ion-exchange resin recycling facility that is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4128848A JP2891820B2 (en) | 1992-05-21 | 1992-05-21 | Regeneration method of ion exchange resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4128848A JP2891820B2 (en) | 1992-05-21 | 1992-05-21 | Regeneration method of ion exchange resin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05317729A true JPH05317729A (en) | 1993-12-03 |
| JP2891820B2 JP2891820B2 (en) | 1999-05-17 |
Family
ID=14994879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4128848A Expired - Fee Related JP2891820B2 (en) | 1992-05-21 | 1992-05-21 | Regeneration method of ion exchange resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2891820B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009519288A (en) * | 2005-12-16 | 2009-05-14 | カーギル インコーポレイテッド | Process for preparing alkaline and heat stable polyols |
| WO2018211794A1 (en) * | 2017-05-19 | 2018-11-22 | オルガノ株式会社 | Condensate demineralization device |
| US11406919B2 (en) | 2017-02-24 | 2022-08-09 | Organo Corporation | Flocculation and sedimentation apparatus |
-
1992
- 1992-05-21 JP JP4128848A patent/JP2891820B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009519288A (en) * | 2005-12-16 | 2009-05-14 | カーギル インコーポレイテッド | Process for preparing alkaline and heat stable polyols |
| KR101311637B1 (en) * | 2005-12-16 | 2013-09-25 | 카아길, 인코포레이팃드 | Process for preparing alkali and heat stable polyols |
| US11406919B2 (en) | 2017-02-24 | 2022-08-09 | Organo Corporation | Flocculation and sedimentation apparatus |
| WO2018211794A1 (en) * | 2017-05-19 | 2018-11-22 | オルガノ株式会社 | Condensate demineralization device |
| JP2018192442A (en) * | 2017-05-19 | 2018-12-06 | オルガノ株式会社 | Condensate demineralizer |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2891820B2 (en) | 1999-05-17 |
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