JPS5927637B2 - Method for recovering acids and alkalis from recycled waste liquid of ion exchange resins - Google Patents
Method for recovering acids and alkalis from recycled waste liquid of ion exchange resinsInfo
- Publication number
- JPS5927637B2 JPS5927637B2 JP51079245A JP7924576A JPS5927637B2 JP S5927637 B2 JPS5927637 B2 JP S5927637B2 JP 51079245 A JP51079245 A JP 51079245A JP 7924576 A JP7924576 A JP 7924576A JP S5927637 B2 JPS5927637 B2 JP S5927637B2
- Authority
- JP
- Japan
- Prior art keywords
- waste liquid
- alkalis
- ion exchange
- exchange resins
- recycled waste
- 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
Links
Landscapes
- Treatment Of Water By Ion Exchange (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Description
【発明の詳細な説明】
本発明はイオン交換樹脂の再生廃液より酸、アルカリを
回収する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for recovering acids and alkalis from recycled waste liquid of ion exchange resins.
イオン交換樹脂による脱塩は純水製造、工場排水の処理
等に広く用いられているが、このような装置を用いた場
合必ず濃縮液としての再生廃液が発生してくる。Desalination using ion exchange resins is widely used in the production of pure water, the treatment of industrial wastewater, etc., but when such equipment is used, recycled waste liquid is always generated as a concentrated liquid.
イオン交換樹脂の再生は吸着されたイオン量の１．５〜
３倍当量の過剰の酸又はアルカリを無駄に廃棄している
ことになる。The regeneration of the ion exchange resin is 1.5 to 1.5 of the amount of adsorbed ions.
Three equivalents of excess acid or alkali are wasted.
また工場排水の処理等に使用した場合には重金属等の有
害物質を含んでいるため一般に行われている中和処理だ
けでは放流することができなくなり、蒸発、乾固等の処
理装置が必要となってくる。In addition, when used for the treatment of industrial wastewater, it cannot be discharged with just the commonly used neutralization treatment because it contains harmful substances such as heavy metals, and treatment equipment such as evaporation and drying is required. It's coming.
本発明はこのような問題に鑑みて過剰の酸アルカリを拡
散透析と電解装置により回収し、更にイオン交換樹脂の
再生剤として利用できるばかりでなく、重金属は中和処
理によりスラッジとして取出すことができるため再生廃
液のクローズドシステムが可能となったものであるがそ
の詳細を説明すれば次の通りである。In view of these problems, the present invention not only recovers excess acids and alkalis using diffusion dialysis and an electrolysis device and can be used as a regenerating agent for ion exchange resins, but also allows heavy metals to be extracted as sludge through neutralization treatment. Therefore, a closed system for recycled waste liquid has become possible, and the details are as follows.
図において、１はカチオン塔からの再生廃液で拡散透析
槽２に導入される。In the figure, 1 is a regenerated waste liquid from a cation tower, which is introduced into a diffusion dialysis tank 2.
該廃液の組成は塩酸再生ではＨＣｌ、Ｎａｃｌ、ＫＣｌ
、Ｃａｃ１２２Ｍｇｃ１２、硫酸再生ではＨ２ＳＯ４，
Ｎａ２ＳＯ４，ＣａＳＯ４゜ＭｇＳＯ４等からなるが拡
散透析槽２′において、拡散透析膜３を通してＨＣｌか
、又はＨ２ＳＯ４のような酸だけが分離され、この酸を
矢印４の如く電解槽５へ導入する。In hydrochloric acid regeneration, the composition of the waste liquid is HCl, Nacl, KCl.
, Cac122Mgc12, H2SO4 in sulfuric acid regeneration,
In the diffusion dialysis tank 2', only acids such as HCl or H2SO4 are separated through the diffusion dialysis membrane 3, and this acid is introduced into the electrolytic tank 5 as shown by arrow 4.
その他の塩類は中和槽６へ導入されてＣａ（ＯＨ）２
、Ｎａ２ＣＯ３，Ｎａ３ＰＯ４の何れかの中和剤１が混
入されスケール成分が沈殿除去される。Other salts are introduced into the neutralization tank 6 and Ca(OH)2
, Na2CO3, or Na3PO4 is mixed in, and the scale components are precipitated and removed.
スケール成分の除去機構は下記の通りである。The scale component removal mechanism is as follows.
ＭｇＳＯ４＋Ｃａ（ＯＨ） ２→Ｍｇ（ＯＨ）２（↓）
＋Ｃａ５Ｏ，５ＣａＳ０４＋Ｎａ２ＣＯ３−＊ＣａＣ０
３（↓）＋Ｎａ２ＳＯ４ＭｇＣｌ２＋Ｃａ（ＯＨ）２−
）Ｍｇ（ＯＨ）２＋Ｃａｃ１２ＣａＣ１２＋ＮａＣＯ３
→ＣａＣ０３（↓）＋ ２ Ｎａ ｃ １Ｎａ２ＰＯ４
はＣａ （ＯＨ） ２の添加が過剰になった場合、２
Ｎａ３ＰＯ４＋ ３ Ｃａ（ＯＨ）２→ｃａ３（ＰＯ４
）２（↓）＋６ＮａＯＨの反応によりＣａ分を除去する
ものである。MgSO4+Ca(OH) 2→Mg(OH)2(↓)
+Ca5O,5CaS04+Na2CO3-*CaC0
3(↓)+Na2SO4MgCl2+Ca(OH)2-
)Mg(OH)2+Cac12CaC12+NaCO3
→CaC03(↓)+ 2 Na c 1Na2PO4
When the addition of Ca (OH) 2 becomes excessive, 2
Na3PO4+ 3 Ca(OH)2→ca3(PO4
)2(↓)+6NaOH is used to remove Ca.
このようにスケール成分を除去したのちのＮａｃｌｔＮ
ａ２Ｓ０４が矢印８のように電解槽５に送入され、ｃｌ
、８０４” 、ＮＯ３−の酸成分がアニオン交換膜
９により分解回収され、カチオン交換膜１０にり透過し
てきたＨ＋イオンと下記のような
Ｈ”＋ｃｌ −＋ＨｃＣ２Ｈ＋＋ＳＯ，” −）Ｈ２
ＳＯ４の反応により酸１１が回収される。NacltN after removing the scale component in this way
a2S04 is sent to the electrolytic cell 5 as shown by arrow 8, and cl
, 804", NO3- acid components are decomposed and recovered by the anion exchange membrane 9, and the H+ ions that have permeated through the cation exchange membrane 10 and the following H"+cl -+HcC2H++SO,"-)H2
Acid 11 is recovered by reaction with SO4.
又、アニオン塔からの再生廃液１２は中和槽６からの液
と共に電解槽５に入る。Further, the regenerated waste liquid 12 from the anion tower enters the electrolytic cell 5 together with the liquid from the neutralization tank 6.
該廃液１２はＮａＯＨ，Ｎａｃｌ。ＮａＮＯｓ、Ｎａ２
ＳＯ４等から成っている。The waste liquid 12 is NaOH, NaCl. NaNOs, Na2
It consists of SO4 etc.
又、電解槽５には一電極１３と十電極１４を設けてあり
、ＮａＯＨの如きアルカリ１５は一電極１３側から回収
される。Further, the electrolytic cell 5 is provided with one electrode 13 and ten electrodes 14, and an alkali 15 such as NaOH is recovered from the one electrode 13 side.
又、陽極液１６としてのＨ２ＳＯ４には適宜水１７を補
給する。Further, water 17 is appropriately replenished to H2SO4 as the anolyte 16.
本発明は上記の通りであり、電解槽５から回収される酸
１１はカチオン塔の再生液として用い、 。The present invention is as described above, and the acid 11 recovered from the electrolytic cell 5 is used as a regenerating liquid for the cation tower.
アルカリ１５はアニオン塔の再生液として用いることに
よって酸、アルカリ回収システムがクローズド化される
から廃液が出ないのである。By using Alkali 15 as a regenerating liquid in the anion tower, the acid and alkali recovery system is closed, so no waste liquid is produced.
従来方法ではイオン交換樹脂の再生の場合吸着イオンの
１．５〜３倍当量の酸、アルカリを使用しているため過
剰分の酸、アルカリが無駄に捨てられていて極めて不経
済であり、又、放流するさい中和剤として酸アルカリの
添加が必要となる。In the conventional method, when regenerating an ion exchange resin, an acid or alkali equivalent of 1.5 to 3 times the amount of adsorbed ions is used, so the excess acid or alkali is wasted, which is extremely uneconomical. When discharging water, it is necessary to add an acid-alkali agent as a neutralizing agent.
しかし本発明では上記のようにクローズドシステムにな
るので１回目の再生剤があればそれ以降の再生は回収酸
、アルカリで行えるのできわめて経済的であり、有害物
質を除去するイオン交換システムの再生廃液の処理が簡
単になる等の種々の効果を有するものである。However, since the present invention is a closed system as described above, if there is a regenerating agent for the first time, subsequent regeneration can be performed using recovered acids and alkalis, making it extremely economical. This has various effects such as simplification of processing.
図面は本発明方法を実施する装置のブロック図である。
１．１２・・・・・・再生廃液、２・・・・・・拡散透
析槽、３・・・・・・拡散透析膜、５・・・・・・電解
槽、６・・・・・・中和槽、９・・・・・・アニオン交
換膜、１０・・・・・・カチオン交換膜、１１・・・・
・・酸、１５・・・・・・アルカリ。The drawing is a block diagram of an apparatus for carrying out the method of the invention. 1.12... Recycled waste liquid, 2... Diffusion dialysis tank, 3... Diffusion dialysis membrane, 5... Electrolytic tank, 6... - Neutralization tank, 9... Anion exchange membrane, 10... Cation exchange membrane, 11...
...acid, 15...alkali.
Claims (1)
透析して得た液と、アニオン再生廃液とをカチオン交換
膜とアニオン交換膜とを備えた電解槽において電気分解
することにより酸アルカリを分離回収することを特徴と
するイオン交換樹脂の再生廃液より酸、アルカリを回収
する方法。1 Separate and recover acids and alkalis by electrolyzing the liquid obtained by dialyzing the cation regeneration waste liquid with the diffusion dialysis membrane of the diffusion dialysis tank and the anion regeneration waste liquid in an electrolytic cell equipped with a cation exchange membrane and an anion exchange membrane. A method for recovering acids and alkalis from recycled waste liquid of ion exchange resins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP51079245A JPS5927637B2 (en) | 1976-06-30 | 1976-06-30 | Method for recovering acids and alkalis from recycled waste liquid of ion exchange resins |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP51079245A JPS5927637B2 (en) | 1976-06-30 | 1976-06-30 | Method for recovering acids and alkalis from recycled waste liquid of ion exchange resins |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS533965A JPS533965A (en) | 1978-01-14 |
| JPS5927637B2 true JPS5927637B2 (en) | 1984-07-06 |
Family
ID=13684463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP51079245A Expired JPS5927637B2 (en) | 1976-06-30 | 1976-06-30 | Method for recovering acids and alkalis from recycled waste liquid of ion exchange resins |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5927637B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4918197B2 (en) * | 2001-09-04 | 2012-04-18 | 前澤工業株式会社 | Method for recovering mineral acid from mixed acid of boric acid and mineral acid |
| JP7112196B2 (en) * | 2017-11-29 | 2022-08-03 | オルガノ株式会社 | Ammonia recovery method and apparatus |
-
1976
- 1976-06-30 JP JP51079245A patent/JPS5927637B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS533965A (en) | 1978-01-14 |
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