JPH0436744B2 - - Google Patents

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Publication number
JPH0436744B2
JPH0436744B2 JP58102185A JP10218583A JPH0436744B2 JP H0436744 B2 JPH0436744 B2 JP H0436744B2 JP 58102185 A JP58102185 A JP 58102185A JP 10218583 A JP10218583 A JP 10218583A JP H0436744 B2 JPH0436744 B2 JP H0436744B2
Authority
JP
Japan
Prior art keywords
treatment
regeneration
exchange resin
ion exchange
water
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.)
Expired - Lifetime
Application number
JP58102185A
Other languages
Japanese (ja)
Other versions
JPS59225744A (en
Inventor
Akira Sato
Masaaki Nagaoka
Tsutomu Sakamoto
Shigeru Takano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Organo Corp
Original Assignee
Organo Corp
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Filing date
Publication date
Application filed by Organo Corp filed Critical Organo Corp
Priority to JP58102185A priority Critical patent/JPS59225744A/en
Publication of JPS59225744A publication Critical patent/JPS59225744A/en
Publication of JPH0436744B2 publication Critical patent/JPH0436744B2/ja
Granted legal-status Critical Current

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  • Treatment Of Water By Ion Exchange (AREA)

Description

【発明の詳細な説明】[Detailed description of the invention]

本発明は、有機物に汚染されたイオン交換樹脂
の回生方法に関し、詳しくは復水脱塩装置におい
て使用されたイオン交換樹脂特にアニオン交換樹
脂の回生に有効な洗浄方法に関するものである。 従来、イオン交換樹脂を用いた復水脱塩装置
は、火力又は原子力発電設備においてコンデンサ
により冷却された復水中の機器の腐食生成物ある
いはコンデンサに孔があいたときに入つてくる冷
却水に起因する不純物を除去する目的で使用され
るものとして知られ、一般に適当な再生操作を周
期的に行なつて長期間運転使用されている。また
この復水脱塩装置は、一般の河川水、井水等を原
水とする一次系の純水処理装置に比べて、復水が
高純度であると共に処理後の水質も極めて高純度
が求められること、例えば火力発電設備では復水
処理後の水質に導電率0.1μm/cm以下が求めら
れ、また原子力発電設備ではこれに加えてナトリ
ウムイオン、クロルイオンのリークが規制される
場合のあることもよく知られるところである。 ところで、一般にイオン交換樹脂は、再生処理
を行なうにしても使用の結果有機物等による汚染
を受けてその性能は次第に低下することが知ら
れ、従来よりこのような汚染付着物の除去のため
に種々の回生方法が研究・提案されている。例え
ば通常の一次系純水処理装置のイオン交換樹脂に
ついては、フミン酸、フムス質、リグニン、下
水・家庭の雑排水等に含まれる主として植物性の
腐食生成物に起因する有機物汚染に対し、10%食
塩と1%苛性ソーダの混合液を用いて洗浄する方
法などである。 しかし復水脱塩装置のイオン交換樹脂について
前記食塩系の溶液を用いた回生処理を行なつても
充分な効果は認められない。これは、復水処理に
おいて問題となる汚染源の有機物は一般の一次系
処理におけるそれとは本来異質なものと考えられ
ること、また復水処理では極めて高純度の水質を
要求することからイオン交換樹脂の汚染も微量な
程度の有機物付着が問題となつていることなどの
ため考えられる。 このような現状から、復水処理においては汚染
を受けて性能の低下したイオン交換樹脂を定期的
に新しいものと交換するのが通例とされ、その結
果、復水脱塩装置ではイオン交換樹脂の使用量が
多いので、そのロスが問題となつているのであ
る。 前記した復水処理において問題となる有機物汚
染源としては、一次系原水から持ち込まれる有機
物、ボイラー、タービンその他の付属機器、配
管、バルブ等に塗布された有機物質すなわち防錆
剤、潤滑油等、若しくはこれらの複合したものな
どが考えられるところである。 なお、イオン交換樹脂の回生処理の一つとし
て、特殊なものはあるが酸化剤を用いた方法が知
られている。すなわち糖類の脱色に用いたイオン
交換樹脂に付着した有機汚染物質を酸化剤で酸化
分解して除去する方法である。しかしこのような
回生処理は、糖類脱色のためのイオン交換樹脂と
いう特殊なものを対象としていて回生処理後のイ
オン交換樹脂によつて得られる処理糖液の電気導
電率は1μs/cm程度であれば足りるものであるこ
と、イオン交換樹脂は酸化をうけるため交換容量
の低下を生じ、以後の通液一再生時の汚染の進行
が早くなることなどの特殊性があり、一般的に、
一次系の純水処理装置におけるイオン交換樹脂の
回生処理に適用することは考えられておらず、ま
してや、復水脱塩装置という高純度を要求される
処理系に用いるイオン交換樹脂の回生という条件
の厳しい処理においては、前記のような酸化剤に
よる回生処理の試みは全くなされていない。これ
らのことから、本発明者等は、復水脱塩装置にお
いて使用の結果性能の低下したイオン交換樹脂の
回生につき種々検討し、アンモニア水を回生剤と
して使用し、あるいはこれとアンモニア塩又はア
ルカリ金属の水溶性塩の溶液との混液を回生剤と
して使用し、前記イオン交換樹脂をこれら回生剤
により洗浄することで優れた回生効果を発するこ
とを内容とした回生方法を開発、提案している。 しかし、実際には前記した回生方法によつても
イオン交換樹脂の性能が回復しない程度に強度に
有機物汚染の進んだものも認められ、本発明者等
はこのように汚染したイオン交換樹脂の回生方法
について更に検討を重ねて本発明をなすに至つた
のである。 すなわち、本発明の特徴は、復水脱塩装置のイ
オン交換樹脂に付着した有機物質は、酸化処理に
より分解させることでその除去が容易となること
の知見を前提として、酸化処理条件を考慮し極め
て高純度の機能を維持しながらイオン交換樹脂の
回復を図る回生方法を開発、創成したところにあ
り、かかる本発明創成に至る特徴の一つは、一般
の一次系の純水に用いるカチオン交換樹脂は酸化
剤により酸化を受けると膨潤を起こすが、復水脱
塩装置に用いるイオン交換樹脂は架橋度が高く耐
酸化性に優れているので酸化処理による影響を受
けにくいことを見出した点にある。また本発明創
成に至る特徴の他の一つは、酸化処理による塩素
イオンのリークは実際上考慮しなくともよいこと
を実験的に見出したことにある。すなわち、一般
に、強塩基性アニオン交換樹脂は酸化を受ける
と、イオン交換活性基である第4級アンモニウム
塩が第3級アミン、第2級アミンと順次低級アミ
ンに移行して遂には活性基を失なうに至り、また
低級アミンをもつ弱塩基性のイオン交換樹脂が塩
素型である場合には、水溶液中において一部加水
分解により塩素イオンを放出するとされており、
したがつて、従来は、特に塩素イオンのリークが
厳しく制限される原子力発電設備用の復水脱塩装
置では、強塩基性樹脂を酸化して低級アミン化さ
せるような酸化剤処理は全く考慮されていなかつ
たのであるが、本発明者等は実験によつて、イオ
ン交換樹脂に付着した有機物の除去のために必要
十分な程度の酸化剤処理によれば、回生処理後の
復水処理においての塩素イオンのリークも何等問
題とならないことを見出したのである。ちなみに
一例を挙げると、汚染樹脂の交換容量が総交換容
量で0.91meq/ml−樹脂、中性塩分解容量0.91m
eq/ml−樹脂のものを、下記実施例2にて回生
処理した場合に、総交換容量0.82meq/ml−樹
脂、中性塩分解0.80meq/ml−樹脂という結果が
得られている。 而して以上の知見に基づいてなされた本発明の
要旨とするところは、復水脱塩処理に用いて性能
の低下したイオン交換樹脂を、酸化剤溶液とアル
カリ金属の水溶性塩の溶液とを同時又は順次に接
触させることを特徴とする復水脱塩用イオン交換
樹脂の回生方法にある。 本発明において使用できる酸化剤としては、次
亜塩素酸ソーダ、亜塩素酸ソーダ、過酸化水素、
ペルオキソ二硫酸カリウムが実用性の面で好まし
い。 重金属を含む酸化剤、例えば過マンガン酸塩、
重クロム酸塩、セリウム塩は、酸化後、酸化剤自
体が還元されて重金属を生成するので、このもの
がカチオン交換樹脂に吸着するし、又アニオン交
換樹脂のみの場合でも重金属が液中に残存した場
合は爾後の再生工程にて金属水酸化物を生ずるの
で、従つてこの場合は洗浄を充分に行なうなど非
常に注意深く操作をすることがよい。 これらの酸化剤は、イオン交換樹脂の有機物質
汚染の程度に応じてその酸化力の強弱を勘案しな
がら溶液の濃度、温度、接触時間を適宜選択しな
がら用いることができ、例えば、前記次亜塩素酸
ソーダ、亜塩素酸ソーダ、過酸化水素、ペルオキ
ソ二硫酸カリウムの場合には、取扱いの実用的
面、あるいは樹脂劣化防止、交換容量の低下防止
等の面から、一般に濃度10%以下で、温度60℃以
下、好ましくは常温で処理することが望ましく、
特に反応の速い次亜塩素酸ソーダの場合には濃度
0.1〜10%で処理時間10分〜2時間、過酸化水素
の場合は濃度1%〜10%で処理時間5時間〜10時
間で処理することが望ましい場合がある。 回生処理の方法としては一例を示すと、回生処
理すべきイオン交換樹脂を再生塔に入れ、所定の
回生剤溶液(酸化剤と塩類溶液)を通液する。又
長時間反応させる場合には再生塔内に入れ、所定
時間浸漬する。 本発明の回生方法は前記した酸化剤溶液を単独
に使用するものではなく、アルカリ金属の水溶性
塩の溶液を用いた洗浄ないし浸漬撹拌の処理を、
同時又は順次に行なうものであり、これにより付
着有機物の除去に一層効果が認められる。同時処
理とは酸化剤とこの酸化剤とは反応しない前記水
溶性塩の溶液を混液として用いる場合をいい、ま
た順次処理とは酸化剤による処理の前又は後に前
記水溶性塩による処理を行なう場合であり、これ
らはいずれによつてもよいが混液による同時処理
によれば操作上の繁雑化がないという利点があ
る。 前記水溶性塩としては、アルカリ金属の水溶性
塩である塩化塩、硫酸塩、硝酸塩を用いることが
でき、特に経済性等の上からは硫酸塩、塩化塩を
使用することが好ましく、これらの水溶液1〜10
%程度の濃度のものを用いることが望ましい場合
がある。これら水溶性塩の溶液による処理は、イ
オン交換樹脂に通液することによつて行なえばよ
く、通液条件として、例えば被処理樹脂量の2〜
10倍量好ましくは2〜4倍量を接触時間として15
分〜2時間程度通液することができる。 回生処理液との接触が完了したならば、純水に
て薬液を置換する。置換に要する水量は一般に樹
脂量の約2倍量程度で足りる。次いで純水にて洗
浄する。洗浄はSV(空間速度)10〜20で20〜60分
行う。次いでカチオン交換樹脂とアニオン交換樹
脂を純水にて逆洗分離し、カチオン交換樹脂は約
4〜8%の塩酸又は硫酸、アニオン交換樹脂は約
4〜8%の苛性ソーダにて再生する。次いでこの
この薬液を押出し酸、アルカリが残存せね迄純水
にて洗浄し、洗浄が終つたら両樹脂を混合するこ
とにより、イオン交換樹脂は復水処理を行うこと
が出来る状態になる。 又アニオン交換樹脂のみを本回生処理をする場
合は、回生処理すべきイオン交換樹脂を純水によ
る逆洗分離をした後アニオン交換樹脂についての
み前記した回生剤処理と再生操作を行う。一方分
離したカチオン交換樹脂は再生操作のみを行つた
後、両樹脂を混合することにより、再び復水処理
を行うことが出来る状態になる。 なお、本発明の回生方法はカチオン交換樹脂と
アニオン交換樹脂を混合した状態で行なつてもよ
いことは勿論であるが、一般に有機物汚染はアニ
オン交換樹脂について顕著に生ずるものであるこ
とを鑑みれば、アニオン交換樹脂についてのみ本
発明回生方法を適用することで所期の目的を達成
する場合が多い。 実施例 1 混床式復水脱塩装置として約3年間使用したイ
オン交換樹脂につき、下記回生剤を用いて回生処
理を行なつた。 試料樹脂:アンバーライト200(カチオン交換樹
脂)(アンバーライトは登録商標:以下同様)
300c.c. アンバーライトIRA−900(アニオン交換樹脂)
150c.c. 回生剤:(1) 1N、NaCl 2/−樹脂 (2) 有効塩素0.5%NaClO 2/−樹脂 再生剤:アンバーライト200に対し35%HCl 350
g/R アンバーライトIRA900に対し 100%NaOH300g/R 処理操作方法: 試料樹脂を混合状態にして24mmφの樹脂筒に充
填し、回生剤溶液をSV=2の流速にて下向流
にて流す。回生溶液の通液は(1)、(2)の順序で行
なつた。 回生処理後、カチオン交換樹脂とアニオン交換
樹脂を純水にて逆洗分離し、次いでそれぞれを再
生剤にて再生した後純水にて洗浄し、その後再び
両樹脂を混合状態として樹脂塔に充填して試験に
供した。 その結果を下記表1に示す。
The present invention relates to a method for regenerating ion exchange resins contaminated with organic matter, and more particularly to a cleaning method effective for regenerating ion exchange resins, particularly anion exchange resins, used in condensate desalination equipment. Conventionally, condensate desalination equipment using ion-exchange resins has been demineralized by corrosion products of equipment in condensate cooled by condensers in thermal or nuclear power generation facilities, or by cooling water that enters when holes are formed in condensers. It is known to be used for the purpose of removing impurities, and is generally used for long periods of time with appropriate regeneration operations performed periodically. In addition, this condensate desalination equipment requires high purity condensate and extremely high purity water quality after treatment, compared to primary water treatment equipment that uses general river water, well water, etc. as raw water. For example, in thermal power generation facilities, the water quality after condensate treatment is required to have an electrical conductivity of 0.1 μm/cm or less, and in addition to this, in nuclear power generation facilities, leakage of sodium ions and chloride ions may be regulated. It is also a well-known place. By the way, it is generally known that even if ion exchange resins are regenerated, their performance will gradually deteriorate due to contamination with organic matter as a result of use. Regeneration methods have been researched and proposed. For example, the ion exchange resin used in ordinary primary water treatment equipment has a 10% This method includes cleaning using a mixed solution of 1% common salt and 1% caustic soda. However, even if the ion exchange resin of the condensate desalination apparatus is subjected to regeneration treatment using the above-mentioned salt-based solution, sufficient effects are not observed. This is because the organic matter that is the source of contamination that is a problem in condensate treatment is considered to be different from that in general primary treatment, and because condensate treatment requires extremely high purity water quality, ion exchange resins are used. Contamination is also thought to be due to the fact that small amounts of organic matter are a problem. Under these circumstances, in condensate treatment, it is customary to periodically replace ion exchange resins whose performance has deteriorated due to contamination with new ones, and as a result, in condensate desalination equipment, the ion exchange resin is Since the amount used is large, the loss becomes a problem. The sources of organic contamination that pose problems in the above-mentioned condensate treatment include organic matter brought in from the primary raw water, organic matter applied to boilers, turbines and other auxiliary equipment, piping, valves, etc., such as rust preventives, lubricating oil, etc. A combination of these may be considered. Note that as one of the regeneration treatments for ion exchange resins, a method using an oxidizing agent is known, although there are some special methods. That is, this method removes organic contaminants attached to the ion exchange resin used for decolorizing sugars by oxidizing and decomposing them with an oxidizing agent. However, this type of regeneration treatment targets a special type of ion exchange resin for decolorizing sugars, and the electrical conductivity of the treated sugar solution obtained by the ion exchange resin after regeneration treatment is approximately 1 μs/cm. In general, ion exchange resins are oxidized, resulting in a decrease in exchange capacity, and contamination progresses more quickly during subsequent liquid passage and regeneration.
It has not been considered to be applied to the regeneration treatment of ion exchange resins in primary water purification equipment, and even less the conditions for regenerating ion exchange resins used in treatment systems that require high purity, such as condensate desalination equipment. In such severe processing, no attempt has been made to use regeneration processing using an oxidizing agent as described above. For these reasons, the present inventors have conducted various studies on the regeneration of ion exchange resins whose performance has deteriorated as a result of use in condensate desalination equipment, and have decided to use ammonia water as a regeneration agent, or to combine this with ammonia salt or alkali. We have developed and proposed a regeneration method that uses a mixture of water-soluble metal salts as a regeneration agent and produces an excellent regeneration effect by cleaning the ion exchange resin with the regeneration agent. . However, in reality, some ion-exchange resins have been contaminated with organic matter to such an extent that the performance of the ion-exchange resins cannot be recovered even with the regeneration method described above. After further study on the method, the present invention was completed. In other words, the present invention is characterized by considering the oxidation treatment conditions based on the knowledge that organic substances attached to the ion exchange resin of the condensate desalination equipment can be easily removed by decomposing them through oxidation treatment. We have developed and created a regeneration method for recovering ion exchange resin while maintaining extremely high purity functions.One of the features that led to the creation of this invention is the cation exchange method used for general primary pure water. Although resins swell when they are oxidized by oxidizing agents, we have discovered that the ion exchange resins used in condensate desalination equipment have a high degree of crosslinking and excellent oxidation resistance, so they are not easily affected by oxidation treatment. be. Another feature that led to the creation of the present invention is the experimental discovery that leakage of chlorine ions due to oxidation treatment does not need to be considered in practice. That is, in general, when a strongly basic anion exchange resin undergoes oxidation, the quaternary ammonium salt, which is an ion exchange active group, migrates to a tertiary amine, then a secondary amine, and then to a lower amine, and finally loses its active group. In addition, if the weakly basic ion exchange resin containing lower amines is of the chlorine type, it is said that chlorine ions are released by partial hydrolysis in an aqueous solution.
Therefore, conventionally, in condensate desalination equipment for nuclear power generation facilities where the leakage of chlorine ions is strictly restricted, treatment with oxidizing agents that oxidizes strong basic resins to convert them into lower amines has not been considered at all. However, through experiments, the present inventors found that if treatment with an oxidizing agent is carried out to the extent necessary and sufficient to remove organic matter adhering to the ion exchange resin, the condensate treatment after regeneration treatment will be effective. They discovered that chlorine ion leakage was not a problem at all. By the way, to give an example, the total exchange capacity of contaminated resin is 0.91 meq/ml - resin, neutral salt decomposition capacity is 0.91 m
When the eq/ml-resin was regenerated in Example 2 below, results were obtained such that the total exchange capacity was 0.82 meq/ml-resin and neutral salt decomposition was 0.80 meq/ml-resin. The gist of the present invention, which was made based on the above knowledge, is to replace an ion exchange resin whose performance has deteriorated when used in condensate desalination treatment with a solution of an oxidizing agent solution and a water-soluble salt of an alkali metal. A method for regenerating an ion exchange resin for condensate desalination, characterized by contacting the ion exchange resins simultaneously or sequentially. Oxidizing agents that can be used in the present invention include sodium hypochlorite, sodium chlorite, hydrogen peroxide,
Potassium peroxodisulfate is preferred from the standpoint of practicality. Oxidizing agents containing heavy metals, e.g. permanganates,
After dichromate and cerium salts are oxidized, the oxidizing agent itself is reduced and produces heavy metals, which are adsorbed to the cation exchange resin, and even if only the anion exchange resin is used, heavy metals remain in the liquid. If this occurs, metal hydroxides will be produced in the subsequent regeneration process, so in this case it is advisable to operate very carefully, including thorough cleaning. These oxidizing agents can be used by appropriately selecting the solution concentration, temperature, and contact time while taking into account the strength of the oxidizing power depending on the degree of organic substance contamination of the ion exchange resin. In the case of sodium chlorate, sodium chlorite, hydrogen peroxide, and potassium peroxodisulfate, they are generally used at a concentration of 10% or less, for practical reasons such as handling, prevention of resin deterioration, and prevention of reduction in exchange capacity. It is desirable to process at a temperature of 60°C or less, preferably at room temperature,
Especially in the case of sodium hypochlorite, which has a fast reaction, the concentration
In the case of hydrogen peroxide, it may be desirable to perform the treatment for 10 minutes to 2 hours at a concentration of 0.1 to 10%, and for 5 to 10 hours at a concentration of 1% to 10%. As an example of a regeneration treatment method, an ion exchange resin to be regenerated is placed in a regeneration tower, and a predetermined regeneration agent solution (oxidizing agent and salt solution) is passed therethrough. If the reaction is to be carried out for a long time, it is placed in a regeneration tower and immersed for a predetermined period of time. The regeneration method of the present invention does not use the above-mentioned oxidizing agent solution alone, but includes cleaning or immersion stirring using a solution of a water-soluble salt of an alkali metal.
This can be done simultaneously or sequentially, and it is more effective in removing attached organic matter. Simultaneous treatment refers to the case where an oxidizing agent and a solution of the water-soluble salt that does not react with the oxidizing agent are used as a mixed solution, and sequential treatment refers to the case where the treatment with the water-soluble salt is performed before or after the treatment with the oxidizing agent. Although any of these may be used, simultaneous processing using a mixed solution has the advantage of not complicating the operation. As the water-soluble salt, water-soluble salts of alkali metals such as chlorides, sulfates, and nitrates can be used. In particular, it is preferable to use sulfates and chlorides from the viewpoint of economy. Aqueous solution 1-10
It may be desirable to use a concentration of about 10%. Treatment with a solution of these water-soluble salts may be carried out by passing the solution through an ion exchange resin, and the conditions for passing the solution may be, for example,
10 times the amount, preferably 2 to 4 times the contact time, 15
The liquid can be passed for about minutes to 2 hours. When contact with the regenerative treatment liquid is completed, the chemical liquid is replaced with pure water. The amount of water required for substitution is generally about twice the amount of resin. Next, wash with pure water. Washing is performed for 20 to 60 minutes at an SV (space velocity) of 10 to 20. Next, the cation exchange resin and anion exchange resin are separated by backwashing with pure water, and the cation exchange resin is regenerated with about 4 to 8% hydrochloric acid or sulfuric acid, and the anion exchange resin is regenerated with about 4 to 8% caustic soda. Next, this chemical solution is extruded and washed with pure water until no acid or alkali remains, and after washing, both resins are mixed, so that the ion exchange resin is ready for condensation treatment. When only the anion exchange resin is subjected to the main regeneration treatment, the ion exchange resin to be regenerated is backwashed and separated with pure water, and then the regeneration agent treatment and regeneration operation described above are performed only on the anion exchange resin. On the other hand, the separated cation exchange resin is subjected to only a regeneration operation, and then both resins are mixed to be in a state where the condensate treatment can be performed again. It should be noted that the regeneration method of the present invention may of course be carried out using a mixture of a cation exchange resin and an anion exchange resin, but in view of the fact that organic contamination generally occurs significantly with anion exchange resins, In many cases, the intended purpose is achieved by applying the regeneration method of the present invention only to anion exchange resins. Example 1 An ion exchange resin that had been used for about 3 years as a mixed bed condensate desalination apparatus was subjected to regeneration treatment using the following regeneration agent. Sample resin: Amberlite 200 (cation exchange resin) (Amberlite is a registered trademark; the same applies hereinafter)
300c.c. Amberlite IRA−900 (anion exchange resin)
150c.c. Regenerating agent: (1) 1N, NaCl 2/- Resin (2) Available chlorine 0.5% NaClO 2/- Resin regenerating agent: 35% HCl 350 for Amberlite 200
g/R 100% NaOH 300g/R for Amberlite IRA900 Processing method: Fill a 24mmφ resin cylinder with the sample resin in a mixed state, and flow the regenerating agent solution downward at a flow rate of SV=2. The regeneration solution was passed in the order of (1) and (2). After regeneration treatment, the cation exchange resin and anion exchange resin are backwashed and separated with pure water, then each is regenerated with a regenerating agent and washed with pure water, and then both resins are mixed again and packed into the resin tower. and subjected to the test. The results are shown in Table 1 below.

【表】 実施例 2 復水脱塩装置として約1.5年間使用したイオン
交換樹脂につき、下記回生剤を用いて回生処理を
行なつた。 試料樹脂:アンバーライト200 300c.c. アンバーライトIRA−900 150c.c. 回生剤:有効塩素0.5%NaCl0+10%NaCl4/
R 再生剤:実施例1と同じ 処理操作方法: 前記回生剤溶液を通水した後、カチオン交換樹
脂とアニオン交換樹脂をそれぞれ上記再生剤に
て再生し、再生後の両樹脂を混合して直径が24
mmφの樹脂塔に充填して試験に供した。 その結果として、通水時の処理水純度(μs/cm
at 20℃)と塩素イオンの漏洩量の測定結果を
下記表2に示す。
[Table] Example 2 An ion exchange resin that had been used as a condensate desalination device for about 1.5 years was subjected to regeneration treatment using the following regeneration agent. Sample resin: Amberlite 200 300c.c. Amberlite IRA-900 150c.c. Regeneration agent: Available chlorine 0.5% NaCl0 + 10% NaCl4/
R Regenerating agent: Same processing method as in Example 1: After passing water through the regenerating agent solution, the cation exchange resin and anion exchange resin are regenerated using the regenerating agent, and the regenerated resins are mixed to reduce the diameter. is 24
It was packed into a mmφ resin tower and used for testing. As a result, the purity of the treated water during water flow (μs/cm
Table 2 below shows the measurement results of the leakage amount of chlorine ions (at 20℃) and the leakage amount of chlorine ions.

【表】 実施例 3 実施例1に比べ、下記回生剤を用いて浸漬撹拌
処理を行なつた他は同様の条件で処理を行なつ
た。 回生剤:(1) 6%H2O2 500c.c. (2) 10%NaCl 4/R 処理操作方法: 実施例1の樹脂同一量を1のビーカに入れ、
前記(1)の回生剤溶液を加えてPH2に調整して一
昼夜ゆるやかに撹拌しながら放置した。その後
樹脂に前記(2)の回生剤溶液を流した後純水に逆
流し、カチオン交換樹脂とアニオン交換樹脂を
分離し、それぞれ実施例1と同一の再生剤にて
再生をし、次いで純水にて洗浄後再び両樹脂を
混合して樹脂塔に充填して試験に供した。 その結果を下記表3に示す。
[Table] Example 3 Compared to Example 1, the treatment was carried out under the same conditions except that the following regenerating agent was used and the immersion stirring treatment was carried out. Regeneration agent: (1) 6% H 2 O 2 500 c.c. (2) 10% NaCl 4/R Treatment method: Put the same amount of resin in Example 1 into beaker 1,
The regenerating agent solution from (1) above was added to adjust the pH to 2, and the mixture was left standing with gentle stirring all day and night. After that, the regenerating agent solution of (2) above was poured into the resin, and then poured back into pure water to separate the cation exchange resin and anion exchange resin, and each was regenerated with the same regenerating agent as in Example 1, and then purified water After washing, both resins were mixed again and filled into a resin column for testing. The results are shown in Table 3 below.

【表】【table】

Claims (1)

【特許請求の範囲】[Claims] 1 復水脱塩処理に用いて性能の低下したイオン
交換樹脂を、酸化剤溶液と、アルカリ金属の水溶
性塩の溶液とを、同時又は順次に接触させて洗浄
処理することを特徴とする復水脱塩用イオン交換
樹脂の回生方法。
1. A method of cleaning an ion exchange resin whose performance has deteriorated due to use in condensate desalination treatment by contacting it with an oxidizing agent solution and a solution of a water-soluble salt of an alkali metal, either simultaneously or sequentially. A regeneration method for ion exchange resin for water desalination.
JP58102185A 1983-06-08 1983-06-08 Regeneration of ion exchange resin for desalting condensate Granted JPS59225744A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58102185A JPS59225744A (en) 1983-06-08 1983-06-08 Regeneration of ion exchange resin for desalting condensate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58102185A JPS59225744A (en) 1983-06-08 1983-06-08 Regeneration of ion exchange resin for desalting condensate

Publications (2)

Publication Number Publication Date
JPS59225744A JPS59225744A (en) 1984-12-18
JPH0436744B2 true JPH0436744B2 (en) 1992-06-17

Family

ID=14320605

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58102185A Granted JPS59225744A (en) 1983-06-08 1983-06-08 Regeneration of ion exchange resin for desalting condensate

Country Status (1)

Country Link
JP (1) JPS59225744A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6238247A (en) * 1985-08-12 1987-02-19 Hitachi Ltd Method for regenerating ion exchange resin

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5449982A (en) * 1977-09-28 1979-04-19 Hitachi Ltd Regenerating method for ion exchange resin

Also Published As

Publication number Publication date
JPS59225744A (en) 1984-12-18

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