JPS63291608A - System for regenerating acidic waste liquid - Google Patents
System for regenerating acidic waste liquidInfo
- Publication number
- JPS63291608A JPS63291608A JP12374387A JP12374387A JPS63291608A JP S63291608 A JPS63291608 A JP S63291608A JP 12374387 A JP12374387 A JP 12374387A JP 12374387 A JP12374387 A JP 12374387A JP S63291608 A JPS63291608 A JP S63291608A
- Authority
- JP
- Japan
- Prior art keywords
- acid
- room
- exchange membrane
- liquid
- acids
- 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
- 239000002699 waste material Substances 0.000 title claims abstract description 40
- 239000007788 liquid Substances 0.000 title claims abstract description 38
- 230000001172 regenerating effect Effects 0.000 title claims description 7
- 230000002378 acidificating effect Effects 0.000 title abstract description 6
- 239000002253 acid Substances 0.000 claims abstract description 89
- 238000000909 electrodialysis Methods 0.000 claims abstract description 47
- 239000012528 membrane Substances 0.000 claims abstract description 37
- 239000003014 ion exchange membrane Substances 0.000 claims abstract description 34
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 31
- 238000000502 dialysis Methods 0.000 claims abstract description 29
- 238000009792 diffusion process Methods 0.000 claims abstract description 28
- 150000003839 salts Chemical class 0.000 claims abstract description 23
- 150000007513 acids Chemical class 0.000 claims abstract description 22
- 238000001556 precipitation Methods 0.000 claims abstract description 21
- 238000005341 cation exchange Methods 0.000 claims abstract description 17
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 8
- 239000011707 mineral Substances 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims description 35
- 239000002184 metal Substances 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 32
- 239000003513 alkali Substances 0.000 claims description 15
- 239000000706 filtrate Substances 0.000 claims description 8
- 238000005349 anion exchange Methods 0.000 claims description 7
- 230000003472 neutralizing effect Effects 0.000 claims description 7
- 150000001450 anions Chemical class 0.000 claims description 6
- 230000001376 precipitating effect Effects 0.000 claims description 3
- 239000003011 anion exchange membrane Substances 0.000 abstract description 12
- 239000010802 sludge Substances 0.000 abstract description 8
- 239000002002 slurry Substances 0.000 abstract description 7
- 150000004679 hydroxides Chemical class 0.000 abstract description 3
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000012716 precipitator Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 46
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 26
- 238000000926 separation method Methods 0.000 description 17
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical class [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 229960002050 hydrofluoric acid Drugs 0.000 description 8
- 150000002739 metals Chemical class 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical class [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 229910000358 iron sulfate Inorganic materials 0.000 description 5
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 238000011282 treatment Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical class [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical class [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000013522 chelant Substances 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Chemical class 0.000 description 3
- 238000005342 ion exchange Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229910017604 nitric acid Inorganic materials 0.000 description 3
- 238000005554 pickling Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- -1 alkalis Chemical class 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 150000004820 halides Chemical class 0.000 description 2
- 238000005649 metathesis reaction Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000011550 stock solution Substances 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 2
- 238000003828 vacuum filtration Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical class [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical class [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical class [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 239000010941 cobalt Chemical class 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical class [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Chemical class 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000011133 lead Chemical class 0.000 description 1
- 239000011777 magnesium Chemical class 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 239000011701 zinc Chemical class 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/36—Regeneration of waste pickling liquors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/42—Electrodialysis; Electro-osmosis ; Electro-ultrafiltration; Membrane capacitive deionization
- B01D61/44—Ion-selective electrodialysis
- B01D61/445—Ion-selective electrodialysis with bipolar membranes; Water splitting
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明は、酸廃液の再生方法に関する。詳しくは、鉱酸
とその金属塩類を含む酸廃液を再生処理するに際し、イ
オン交換膜電気透析装置または拡散透析装置により脱酸
する工程、脱酸液を中和沈殿分離する工程、この中和、
沈殿分離した中和濾液をバイポーラ膜と陰、陽イオン交
換膜の組合せからなるイオン交換ａ電気透析装置により
、酸とアルカリに再生する工程からなり、必要に応じて
、当該工程より生成するアルカリ液を中和沈殿分離する
工程の中和剤に使用し、あるいは生成する酸は脱酸工程
の電気透析装置の濃縮側に導入して高濃度の酸として再
生する酸廃液の再生方法である。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for regenerating acid waste liquid. In detail, when regenerating acid waste liquid containing mineral acids and their metal salts, there are a process of deoxidizing with an ion exchange membrane electrodialysis device or a diffusion dialysis device, a process of neutralizing and precipitating and separating the deacidifying liquid, this neutralization,
The process consists of regenerating the precipitated and separated neutralized filtrate into acid and alkali using an ion exchange a electrodialysis device consisting of a combination of a bipolar membrane and an anion and cation exchange membrane. This is a method for regenerating acid waste liquid, in which the acid is used as a neutralizing agent in the process of neutralization and precipitation separation, or the generated acid is introduced into the concentration side of an electrodialyzer in the deacidification process to regenerate it as a highly concentrated acid.
［従来技術およびその問題点］
鉱酸とその金属塩類を含む酸廃液は近年、種々の産業に
おける製造プロセス、処理プロセスあるいは加工プロセ
スなどから、希薄な酸含有液が大量に排出される。例え
ば、非鉄金属の原鉱またはメタルの処理工程からの＠酸
含有溶液、抽出またはピックリング工程からの塩酸含有
溶液、タンタルや鉛の処理工程からの弗酸含有溶液、溶
媒抽出、エツチング工程からの塩酸、硫酸、硝酸含有溶
液、メッキ廃液からのクロム酸含有溶液などが挙げられ
る。特に鉄または非鉄金属のエツチング、ビックリング
あるいはメッキ工程、製錬工程においては、酸中に金属
が塩として溶出し、該金属塩類の濃度が許容量を越した
場合には、もはやその酸は使用出来なくなるため、酸と
その金属塩類を含む多量の溶液が廃液として生じる。し
たがって従来、酸廃液は公害上の問題から中和処理など
の適宜の処理をした後、スラッジ、スラリーとして廃棄
されている。しかし、上記のような酸廃液から金属成分
と酸とを分離し再回収できるならば、種々の酸廃液の再
利用、公賓防止上から極めて有利である。[Prior art and its problems] In recent years, large amounts of dilute acid-containing liquids have been discharged from manufacturing processes, treatment processes, processing processes, etc. in various industries. For example, @acid-containing solutions from non-ferrous metal raw ore or metal processing processes, hydrochloric acid-containing solutions from extraction or pickling processes, hydrofluoric acid-containing solutions from tantalum and lead processing processes, solvent extraction, and etching processes. Examples include solutions containing hydrochloric acid, sulfuric acid, and nitric acid, and solutions containing chromic acid from plating waste liquid. Particularly in the etching, bicking, plating, and smelting processes of ferrous or nonferrous metals, if the metal is eluted as a salt in the acid and the concentration of the metal salt exceeds the allowable amount, the acid can no longer be used. As a result, a large amount of solution containing the acid and its metal salts is produced as waste liquid. Therefore, conventionally, acid waste liquids are disposed of as sludge or slurry after being subjected to appropriate treatments such as neutralization due to pollution problems. However, if the metal components and acid could be separated and re-recovered from the acid waste liquid as described above, it would be extremely advantageous from the standpoint of reusing various acid waste liquids and preventing guests from attending.
従来技術としては、例えば特開昭５２−１０１６９０．
５３−２３７９．５３−１８４７０号などにおいて、陰
、陽イオン交換膜により形成された電気透析槽において
、酸とその金属塩類の含有廃液を脱酸、濃縮して後、そ
の脱酸液を両極室を陰イオン交換膜で区画した隔膜電解
槽において電解して、金属またはその水酸化物として析
出させる方法が提案されている。しかしながら、このよ
うな方法では各室毎に電極を有す毬隔膜電解槽を用いる
ため、装置の規模が多大になるばかりでなく、酸廃液に
ハロゲン化物を含有する場合には電極の材質を厳選する
必要があり、経済的に問題があった。したがって、上記
した如き鉱酸とその金属塩ｆｆｎを含有する酸廃液から
酸と金属成分とを分離して、高濃度の酸、アルカリ、お
よび金属として再利用する従来方法は効率的でなく、ま
た高濃度の酸を得ることが難しいこともあって、工業的
に実施された例はほとんどない。As a conventional technique, for example, Japanese Patent Application Laid-Open No. 52-101690.
No. 53-2379.53-18470 etc., after deacidifying and concentrating waste liquid containing acid and its metal salts in an electrodialysis tank formed by an anion and cation exchange membrane, the deacidified liquid is passed into a bipolar chamber. A method has been proposed in which metals or their hydroxides are precipitated by electrolyzing them in a diaphragm electrolytic cell partitioned by anion exchange membranes. However, this method uses a diaphragm electrolytic cell with an electrode in each chamber, which not only increases the scale of the equipment, but also requires careful selection of electrode materials if the acid waste solution contains halides. It was necessary to do so, and there were financial problems. Therefore, the conventional method of separating the acid and metal components from the acid waste solution containing mineral acids and their metal salts ffn and reusing them as highly concentrated acids, alkalis, and metals is not efficient, and Partly because it is difficult to obtain highly concentrated acids, there are almost no examples of this being carried out industrially.
［問題点を解決するための手段］
本発明は、上記のような酸とその金属塩類との含有する
酸廃液から金属成分と酸を分離し、さらに該金属成分を
中和沈殿分離した中和濾液を効率的に酸とアルカリに再
生回収できる新規な処理方法を提供するものである。即
ち、本発明は、鉱酸とその金属塩類を含む酸廃液をイオ
ン交換膜電気透析装置または拡散透析装置により脱酸す
る工程（Ａ）、脱Ｍ液を中和沈殿分離する工程（Ｒ）、
中和沈殿分離した液をバイポーラ膜と陰陽イオン交換膜
の組合せからなるイオン交換膜電気透析装置により酸と
アルカリに再生する工程（Ｃ）からなり、必要に応じて
当該工程より生成するアルカリ液を中和沈殿分離する工
程（Ｂ）の中和剤に使用し、あるいは生成する峻は脱酸
工程（Ａ）のイオン交換膜電気透析装置または拡散透析
装置の濃縮側に導入して高濃度の陵として再生すること
を特徴とする方法である。[Means for Solving the Problems] The present invention is directed to a neutralization process in which metal components and acids are separated from an acid waste solution containing acids and metal salts thereof as described above, and the metal components are further neutralized and precipitated. The present invention provides a novel treatment method that can efficiently regenerate filtrate into acid and alkali. That is, the present invention includes a step (A) of deoxidizing an acid waste solution containing a mineral acid and its metal salts using an ion exchange membrane electrodialysis device or a diffusion dialysis device, a step (R) of neutralizing and precipitating the de-M solution,
It consists of a step (C) in which the neutralized, precipitated and separated liquid is regenerated into acid and alkali using an ion exchange membrane electrodialysis device consisting of a combination of a bipolar membrane and an anion and cation exchange membrane. The sulfate used as the neutralizing agent in the neutralization precipitation separation step (B) or produced is introduced into the concentration side of the ion-exchange membrane electrodialysis device or diffusion dialysis device in the deoxidation step (A) to obtain a high-concentration solution. This method is characterized in that it is played back as follows.
本発明によれば、酸と金属成分の分離が効率的に完全に
達成され、しかも中和沈殿分離に使用されるアルカリま
たは非常に高濃度の酸を得ることが可能である。即ち、
本発明では、従来から用いられている中和処理などの方
法で金属物をスラッジ、スラリーとして廃棄されている
工程を既存のまま使用でき、さらには、多種多様の産業
で使われている鉱酸の廃液の再生を経済的に行うことが
可能である。このような本発明の効果は、上記した廃酸
液を脱酸するイオン交換膜電気透析装置または拡散透析
装置（１）と中和沈殿分離装置（Ｉｔ）とバイポーラ膜
と陰陽イオン交換膜の組合せからなるイオン交換膜電気
透析装置（Ｉｌｌ ）とのそれぞれの特質を利用し、こ
れを組合せることによって極めて効率的に酸回収を可能
としたものである。According to the present invention, the separation of acid and metal components is efficiently and completely achieved, and it is also possible to obtain alkali or very highly concentrated acids for use in neutralization precipitation separation. That is,
The present invention enables the existing process of discarding metal objects as sludge or slurry by methods such as neutralization treatment, which has been conventionally used, to be used as is. It is possible to economically regenerate waste liquid. Such effects of the present invention are achieved by the above-mentioned combination of an ion exchange membrane electrodialysis device or diffusion dialysis device (1) for deoxidizing the waste acid solution, a neutralization precipitation separation device (It), a bipolar membrane, and an anion-cation exchange membrane. By utilizing the characteristics of the ion-exchange membrane electrodialyzer (Ill) consisting of ion exchange membrane electrodialysis equipment (Ill), and combining these, it has become possible to recover acids extremely efficiently.
以下、本発明を図面等を示しながら詳細に説明する０本
発明で処理の対象とされる酸とその金属塩類を含む廃液
とは、上記したように種々の例が挙げられる。Ｗｌとし
てはその酸根（酸を形成する陰イオン）が陰イオン交換
膜を透過しうるものであれば特に制限されず、例えば硫
酸、塩酸、硝酸リン酸、フッ酸なとの廃酸である。また
、それに含有される金属塩類としは例えば鉄、ニッケル
、クロム、亜鉛、銅、アルミニウム、マグネシウム、鉛
、コバルト等の塩であり特に制限されない。特に本発明
は、ハロゲン化物を含む酸廃液を極めて効率的に処理す
ることができる。これらの廃液の代表的な一例としはタ
ンタルや鉛の処理工程からの弗酸含有溶液、製錬工程か
らの硝弗酸含有溶液、鉄のビックリング工程からの排出
される硫酸と硫酸鉄の含有溶液などが挙げられる。当然
のことながら、上記の酸と金属塩類は二種以上台まれて
いてもよく、またそれは必ずしも廃液と呼ばれるもので
なくてもよい。即ち、本発明は上記のような酸とその金
属塩とを含有する溶液の全てに適用されるものである。Hereinafter, the present invention will be described in detail with reference to the drawings and the like.As described above, various examples can be given of the waste liquid containing acids and metal salts thereof to be treated in the present invention. Wl is not particularly limited as long as its acid radical (anion forming acid) can pass through an anion exchange membrane, and examples thereof include waste acids such as sulfuric acid, hydrochloric acid, nitric acid, phosphoric acid, and hydrofluoric acid. Further, the metal salts contained therein are, for example, salts of iron, nickel, chromium, zinc, copper, aluminum, magnesium, lead, cobalt, etc., and are not particularly limited. In particular, the present invention allows acid wastewater containing halides to be treated very efficiently. Typical examples of these waste liquids include hydrofluoric acid-containing solutions from tantalum and lead processing processes, nitric-fluoric acid-containing solutions from smelting processes, and sulfuric acid and iron sulfate containing discharged from iron bicking processes. Examples include solutions. Naturally, two or more of the above-mentioned acids and metal salts may be present, and it does not necessarily have to be called a waste liquid. That is, the present invention is applicable to all solutions containing the acids and their metal salts as described above.
本発明の第１図において、（１）はイオン交換膜電気透
析装置、または拡散透析装置、（１【）は中和沈殿分離
装置、（Ｉｌｌ ）は複分解を行うイオン交換膜電気透
析装置であり、また（Ａ）は脱酸および濃縮工程、（Ｒ
）は脱酸液の中和沈殿分離工程、（（：）は酸、アルカ
リ再生工程を示す。さらに具体的に、イオン交換膜電気
透析装置（１）は両極間に陽イオン交換膜および陰イオ
ン交換膜を交互に配置あるいは拡散透析装置（１）は陰
イオン交換膜などの拡散膜を設けることにより、脱酸室
（透析室）１および濃縮室（拡散室）２に区画され、中
和沈殿分離装置１）としては、各種の廃酸かどを処理す
る既存の中和、沈殿、分ａ装置が特に制限なく採用され
、例えば第２図に示すような中和槽、沈殿槽、Ｓ縮槽、
真空′ＩＭ過槽を配備して構成され、またイオン交換′
Ｐｉ電気透析装置（１１１）は陽イオン交換膜３、バイ
ポーラ膜４、陰イオン交換膜５、を順に配置することに
より中間室（″ａ分解室）６、酸生成室７およびアルカ
リ生成室１３に区画される。In FIG. 1 of the present invention, (1) is an ion-exchange membrane electrodialysis device or a diffusion dialysis device, (1[) is a neutralization precipitation separation device, and (Ill) is an ion-exchange membrane electrodialysis device that performs double decomposition. , and (A) is a deacidification and concentration step, (R
) indicates the neutralization precipitation separation process of the deacidifying solution, and ((:) indicates the acid/alkali regeneration process.More specifically, the ion exchange membrane electrodialysis device (1) uses a cation exchange membrane and an anion between the two electrodes. The diffusion dialysis device (1) is divided into a deoxidizing chamber (dialysis chamber) 1 and a concentration chamber (diffusion chamber) 2 by alternately arranging exchange membranes or by providing a diffusion membrane such as an anion exchange membrane. As the separation device 1), existing neutralization, precipitation, and separation devices for treating various types of waste acid residues can be used without any particular restrictions. ,
It consists of a vacuum 'IM' tank, and an ion exchange system.
The Pi electrodialysis device (111) has a cation exchange membrane 3, a bipolar membrane 4, and an anion exchange membrane 5 arranged in this order to provide an intermediate chamber (a decomposition chamber) 6, an acid generation chamber 7, and an alkali generation chamber 13. compartmentalized.
本発明のイオン交換膜電気透析装置または拡散透析装置
（１）および（ＩＩＩ ）に使用される上記の陽イオン
交換膜、陰イオン交換膜およびバイポーラ膜は、従来公
知の膜が適宜に採用することができるが、それぞれ酸の
分離、中性塩の複分解に有効な膜を選択すればよい。例
えば、陽イオン交換膜としては、少なくとも一方の膜表
層部にアミノ基などの陰イオン交換基、あるいは炭素数
４〜；３０の長鎖アルキル基を結合した陽イオン選択性
の陽イオン交換膜が浸透水量も少なく出来るため好適で
ある。陰イオン交換膜としては、電気透析における電流
効率の向上を図るために、水素イオンの透過（拡散）が
少ない弱塩基性陰イオン交換膜が好適である。また、バ
イポーラ−膜としては、陰イオン交換層と陽イオン交換
層とを有し、特に該陽イオン交換層の固定イオン濃度が
ＩＯＮ以上のバイポーラ−膜が加水分解効率を高く、か
つ水素イオンの逆拡散を小さく出来るため好適である。The above-mentioned cation exchange membrane, anion exchange membrane and bipolar membrane used in the ion exchange membrane electrodialysis device or diffusion dialysis device (1) and (III) of the present invention may be conventionally known membranes as appropriate. However, it is sufficient to select a membrane that is effective for separating acids and metathesis of neutral salts. For example, as a cation exchange membrane, a cation-selective cation exchange membrane in which an anion exchange group such as an amino group or a long chain alkyl group having 4 to 30 carbon atoms is bonded to at least one surface layer of the membrane is used. This is suitable because the amount of permeated water can be reduced. As the anion exchange membrane, a weakly basic anion exchange membrane with low permeation (diffusion) of hydrogen ions is suitable in order to improve current efficiency in electrodialysis. In addition, as a bipolar membrane, it has an anion exchange layer and a cation exchange layer, and in particular, a bipolar membrane in which the fixed ion concentration of the cation exchange layer is higher than ION has high hydrolysis efficiency and hydrogen ion This is preferable because despreading can be reduced.
本発明においては、鉱酸とその金属塩類を含有する峻廃
液（原液）９をイオン交換膜電気透析槽または拡散透析
装置（１）の脱酸室（透析室）１に供給し、一方の濃縮
室（拡散室）２には希薄な酸を供給して、原廃液から酸
を効率的に回収するために電気透析を実施する条件を適
切に選択する。In the present invention, a concentrated waste solution (undiluted solution) 9 containing a mineral acid and its metal salts is supplied to a deacidification chamber (dialysis chamber) 1 of an ion exchange membrane electrodialysis tank or a diffusion dialysis device (1), and one of the concentrated A dilute acid is supplied to the chamber (diffusion chamber) 2, and conditions for performing electrodialysis are appropriately selected in order to efficiently recover the acid from the raw waste liquid.
例えば、イオン交換Ｐｉ電気透析装置（１）に原液を供
給する速度は一般に０．５〜２０ ｃｍ ／ ｓｅｃ
。For example, the rate of supplying the stock solution to the ion exchange Pi electrodialysis device (1) is generally 0.5-20 cm/sec
.
好ましくは３〜８ｃｍ ／ ｓｅｅであり、電流密度は
一般に１〜３０Ａ／ｒｊｍ２であり好ましくは３〜１５
Ａ／ｄｍ２が適用され、温度は１０〜５０℃程度が好ま
しい。また、拡散透析装置（【）に原液を供給する速度
は、一般に０．０１〜５０／ｍｉｎ。Preferably it is 3-8 cm/see, and the current density is generally 1-30 A/rjm2, preferably 3-15
A/dm2 is applied, and the temperature is preferably about 10 to 50°C. Further, the rate of supplying the stock solution to the diffusion dialysis device ([) is generally 0.01 to 50/min.
特に０．１−１（至）／−１ｎ程度が好ましい。かくし
て、特にイオン交換膜電気透析装置（１）では、原廃液
９の酸が金属塩を同伴することなくほぼ選択的に濃縮室
２に透析移行する。したがって、イオン交換膜電気透析
装置（１）の脱酸室ｌからは涼酸廃液中のＶ濃度が低下
した脱酸液１０が得られ、濃縮室２からは高濃度の酸液
１１が得られる。Particularly preferred is about 0.1-1/-1n. Thus, particularly in the ion exchange membrane electrodialysis apparatus (1), the acid in the raw waste liquid 9 is almost selectively transferred to the concentration chamber 2 by dialysis without being accompanied by metal salts. Therefore, from the deoxidizing chamber 1 of the ion exchange membrane electrodialysis device (1), a deoxidizing solution 10 with a reduced V concentration in the cool acid waste solution is obtained, and from the concentration chamber 2, a highly concentrated acid solution 11 is obtained. .
電気透析の程度は、原廃液９における金属塩の種類によ
っても異なるが、一般にｐ Ｈ約１〜２まで脱酸液１０
の酸濃度を低下することが好ましい。The degree of electrodialysis varies depending on the type of metal salt in the raw waste solution 9, but generally the deoxidizing solution 10 is heated to a pH of approximately 1 to 2.
It is preferable to reduce the acid concentration.
また同様に拡散透析装置（１）の透析室ｌからは原液の
脱酸液１０が得られ、拡散室２からは酸液１１を得る。Similarly, a undiluted deoxidizing solution 10 is obtained from the dialysis chamber 1 of the diffusion dialysis apparatus (1), and an acid solution 11 is obtained from the diffusion chamber 2.
次に、脱Ｐａ室（透析室）１からの脱酸液１０は、中和
沈殿分離装ｆｉｔ（Ｉ’［）に供給し、まずアルカリ液
１２で中和した後、液中の金属塩を水酸化物として沈殿
させスラッジ、スラリー１３にし、中和１１ｔｌ！１４
は難溶性塩の含有度により必要に応じてキレート樹脂塔
１５を通した後、イオン交換膜電気透析装置（ＩＩＩ
）の中間室６に供給する。イオン交換膜電気透析装置（
１１１）においては、中間室６に供給した中和濾液を複
分解することにより、酸室７から酸と塩基室８からアル
カリを効率的に生成するために、電気透析の条件を適切
に選択する。Next, the deoxidizing solution 10 from the de-Pa room (dialysis room) 1 is supplied to the neutralization precipitation separator fit (I'[), and after first being neutralized with the alkaline solution 12, the metal salts in the solution are removed. Precipitate as hydroxide, make sludge, slurry 13, neutralize 11 tl! 14
is passed through the chelate resin column 15 as necessary depending on the content of poorly soluble salts, and then subjected to an ion exchange membrane electrodialysis device (III
) is supplied to the intermediate chamber 6. Ion exchange membrane electrodialysis equipment (
In step 111), electrodialysis conditions are appropriately selected in order to efficiently generate acid from the acid chamber 7 and alkali from the base chamber 8 by double decomposing the neutralized filtrate supplied to the intermediate chamber 6.
例えば、中和濾液１４のイオン交換膜電解透析装置（Ｉ
ＩＩ ）に供給する速度は一般に０．５〜１０絹／ｓｅ
ｃ、電流密度は一般に０．５〜２ＯＡ／ｄｍ２、また温
度は１０〜５０℃程が好ましい。For example, an ion exchange membrane electrodialyzer (I
II) The feeding rate is generally 0.5 to 10 silks/se.
c. The current density is generally 0.5 to 2 OA/dm2, and the temperature is preferably about 10 to 50°C.
かくして、イオン交換膜電気透析装置（■１）では、陽
イオン交換膜および陰イオン交換膜を介して、中和濾液
１４の各イオンが選択的に透析移行する。したがって、
イオン交換膜電気透析装置（■）ではバイポーラ−膜を
介して塩基室８から高濃度のアルカリが得られ、酸生成
室７から高濃度の酸が得られる。再生したアルカリには
、中和沈殿分離装置（ＩＩ）へ中和濃度に応じて供給、
また再生した酸１６はイオン交換膜電気透析槽（１）の
濃縮室もしくはそのまま再生酸液として供給することが
出来る。Thus, in the ion-exchange membrane electrodialysis device (1), each ion in the neutralized filtrate 14 is selectively dialyzed and transferred via the cation-exchange membrane and the anion-exchange membrane. therefore,
In the ion exchange membrane electrodialysis apparatus (■), a highly concentrated alkali is obtained from the base chamber 8 via the bipolar membrane, and a highly concentrated acid is obtained from the acid generating chamber 7. The regenerated alkali is supplied to the neutralization precipitation separator (II) according to the neutralization concentration.
Further, the regenerated acid 16 can be supplied to the concentration chamber of the ion exchange membrane electrodialysis tank (1) or directly as a regenerated acid solution.
［発明の効果］
上記のように本発明によれば、鉱酸とその金属を含有す
る酸廃液から、高濃度の酸を経済的に効率よく回収でき
、また金属は水酸化物として回収できる。プロセスとし
ては、中和に使用するアルカリも再生できるため、外部
から別途に供給することなく、プロセスをクローズド化
することが出来る。また、本発明により回収された酸は
高濃度であるため、必要量を希釈して金属処理に循環使
用でき、また他の方面へ使用も可能である。[Effects of the Invention] As described above, according to the present invention, highly concentrated acids can be economically and efficiently recovered from acid waste liquid containing mineral acids and their metals, and metals can be recovered as hydroxides. As for the process, since the alkali used for neutralization can also be regenerated, the process can be closed without having to be supplied separately from the outside. Furthermore, since the acid recovered by the present invention has a high concentration, it can be diluted in the required amount and recycled for metal processing, and can also be used in other fields.
［実施例］
以下に、本発明を更に具体的に示すために実施例を示す
が、本発明は上記説明及び下記の実施例によって何ら限
定されるものではない。[Examples] Examples are shown below to more specifically illustrate the present invention, but the present invention is not limited in any way by the above description and the following examples.
実施例１
ステンレスの酸洗工程から排出された硝酸１３０ｇ／Ｉ
；Ｌ、弗酸２０ｇ／琵、鉄５０ｇ／Ｑ、ニッケル５ｇ／
（１、およびクロム１０ｇ／Ｑを含む廃液を第１図のフ
ロシートに従って処理し、硝弗酸と金属に分離回収した
。Example 1 Nitric acid 130g/I discharged from stainless steel pickling process
;L, hydrofluoric acid 20g/Bi, iron 50g/Q, nickel 5g/
(1) and a waste liquid containing 10 g/Q of chromium was treated according to the flow sheet shown in Figure 1 and separated and recovered into nitric-fluoric acid and metals.
電気透析槽（１）としては、ネオセブター〇ＭＳおよび
ネオセブタ−ＡＣＭ（それぞれ徳山曹達■製の強酸性陽
イオン交換膜と弱塩基性陰イオン交換膜）により脱酸室
と酸濃縮回収室とに区画した電気透析槽ＴＳ−２型（徳
山曹達ｎ製、有効膜面積２ｄｍ２／対）を使用した。イ
オン交換膜電気透析装置（ＩＩＩ ）としては、上記と
同一のネオセブターＣＭＳおよび−ＡＣＭとバイポーラ
Ｔ’（ＰＭ（強酸性陽イオン交換基と強塩基性陰イオン
交換基を有したバイポーラ膜）により、中間室、酸生成
室およびアルカリ生成室とに区間した電気透析槽（徳１
１１ｇ達■製、有効膜面積２ｄｍ２）を使用した。また
、中和沈殿分離装置としては、第２図に示すような中和
槽、沈殿槽、濃縮槽、真空濾過機を配備した。The electrodialysis tank (1) is divided into a deacidification chamber and an acid concentration recovery chamber using Neocebuta MS and Neocebuta ACM (strongly acidic cation exchange membrane and weakly basic anion exchange membrane manufactured by Tokuyama Soda, respectively). An electrodialysis tank TS-2 type (manufactured by Tokuyama Soda N, effective membrane area 2 dm2/pair) was used. The ion exchange membrane electrodialysis device (III) uses the same Neocebuta CMS and -ACM as above and Bipolar T' (PM (a bipolar membrane having a strong acidic cation exchange group and a strong basic anion exchange group). Electrodialysis tank (Toku 1) divided into an intermediate chamber, an acid generation chamber, and an alkali generation chamber
A 11g (effective membrane area: 2 dm2) manufactured by Datsui Co., Ltd. was used. In addition, as a neutralization precipitation separation device, a neutralization tank, a precipitation tank, a concentration tank, and a vacuum filtration machine as shown in FIG. 2 were provided.
電気透析槽（１）においては温度３５℃、平均ｆｔ、流
密度５Ａ／ｄｍ２、膜面速度Ｆ５ｃｍ／ｓｅｅで運転し
た。その結果、硫酸１０ｇ／Ｑ、、鉄７０ｇ／ｑ、ニッ
ケル７ｇ／Ｑ、およびクロム１４ｇ／込の脱ｌ？ｉ液と
硫酸３０３ ｇ ／込、弗酸８．ｌＬｇ／ｑ、および鉄
０．９３ｇ／Ｑを含む回収液が得られた。上記の脱酸液
は中和沈殿分離装置（１１）へ供給し、まず中和槽で水
酸化ナトリウムを用いて中和させた後、沈殿槽に送り固
体と液分に分離し、底部に集まった固形分は濃縮槽に１
ＪｔＩ泥され、真空濾過機によって脱水処理を行いスラ
ッジとして得た。一方、中和濾液はキレート樹脂塔を通
した後、１、ｔｌ／ｈで電気透析槽（ＩＩＩ ’）の中
間室に供給した。電気透析槽（ＩＩＩ）においては温度
３５℃、平均電流密度５Ａ／ｄｍ２で運転した。その結
果、硫酸７１ｇ／ｑ、弗酸５７ｇ／Ｑと水酸化ナトリウ
ム１６０ｇ／Ｑの再生液が得られた。The electrodialysis tank (1) was operated at a temperature of 35°C, an average ft, a flow density of 5A/dm2, and a membrane surface velocity of F5cm/see. As a result, 10 g/Q of sulfuric acid, 70 g/Q of iron, 7 g/Q of nickel, and 14 g/Q of chromium were removed. I solution and sulfuric acid 303 g/incl., hydrofluoric acid 8. A recovered liquid containing 1 Lg/q and 0.93 g/Q of iron was obtained. The above deacidifying solution is supplied to the neutralization sedimentation separator (11), where it is first neutralized using sodium hydroxide, and then sent to the settling tank where it is separated into solid and liquid components, which collect at the bottom. The solid content is transferred to the concentration tank.
JtI slurry was applied and dewatered using a vacuum filter to obtain a sludge. On the other hand, the neutralized filtrate was passed through the chelate resin tower and then supplied to the intermediate chamber of the electrodialysis tank (III') at a rate of 1, tl/h. The electrodialysis tank (III) was operated at a temperature of 35°C and an average current density of 5A/dm2. As a result, a regenerated solution containing 71 g/q of sulfuric acid, 57 g/Q of hydrofluoric acid, and 160 g/Q of sodium hydroxide was obtained.
次いで、この再生した酸は、電気透析槽（１）の濃縮室
５に供給し、再生酸として循環使用した。Next, this regenerated acid was supplied to the concentration chamber 5 of the electrodialysis tank (1) and used for circulation as regenerated acid.
また再生アルカリは、中和沈殿分離工程の中和剤として
使用した。The recycled alkali was also used as a neutralizing agent in the neutralization precipitation separation process.
実施例２
鉄のビックリング工程から排出された硫酸１１０ｇ／Ｑ
および硫酸鉄ｔ５ｏｇ／Ｑを含む酸排液を第１図のフロ
ーシートに従って処理し、硫酸と金属に分離回収した。Example 2 110g/Q of sulfuric acid discharged from iron bicking process
The acid waste solution containing t5og/Q of iron sulfate was treated according to the flow sheet shown in FIG. 1, and sulfuric acid and metal were separated and recovered.
実施例１と同一の電気透析（１）、（ＩＩＩ ）および
中和沈殿分離表Ｐ＃ｋ（ＩＩＩ）を用いて実施例１と同
様の条件、工程で行った。The same conditions and steps as in Example 1 were carried out using the same electrodialysis (1), (III) and neutralization precipitation separation table P#k (III) as in Example 1.
その結果、電気透析装置（１）および（ＩＩＩ ）にお
いて得られた液の組成を第１表に示す。As a result, the compositions of the solutions obtained in the electrodialyzers (1) and (III) are shown in Table 1.
第１表
実施例；３
アルミの酸洗工程から排出された塩酸４５ｇ／Ｑおよび
アルミｔｓｇ／Ｑを含む廃液を第１図のフローシートに
従って処即し、塩酸と金属に分離回収した。実施例１と
同一のｉ！気透析装置（１）および（ＩＩＩ ）と中和
沈殿分離装置（ＩＩＩ ）を用いて、実施例１と同様の
条件、工程で行った。Table 1 Example: 3 A waste liquid containing 45 g/Q of hydrochloric acid and tsg/Q of aluminum discharged from the aluminum pickling process was treated according to the flow sheet shown in FIG. 1, and the hydrochloric acid and metal were separated and recovered. The same i! as in Example 1! The experiment was carried out under the same conditions and steps as in Example 1 using the gas dialysis equipment (1) and (III) and the neutralization precipitation separation equipment (III).
その際の結果を第２表に示す。The results are shown in Table 2.
実施例４
硫酸鉄１．０７規定および硫酸２．１６規定を含む酸廃
液を第１図のフローシートに従って処理し、硫酸と金属
に分離回収した。拡散透析槽（１）としてはネオセブタ
ＡＦＮ（徳１１１曹達■製、強塩基性陰イオン交換膜）
により拡散室と透析室とに区画した拡散透析装置ＴＳＤ
−２型く徳山曹達■製、有効膜面積２ｄｍ２）を使用し
た。イオン交換膜電気透析装置（Ｉｌｌ ）と、中和沈
殿分離装置は実施例１と同様な装置を配協した。拡散透
析槽（１）においては、拡散室に上部から３０’Ｃの水
を０−６Ｑ／ｆｉｒで供給し、また透析室に下部から上
記の酸廃液を０．６＜１／ｌｌｒで供給した。その結果
、拡散室１より硫酸２規定および硫酸鉄０．１規定の酸
液を回収し、透析室２から硫酸０．１ｆ；規定および硫
酸鉄０．９７規定の脱酸した廃液が排出された。Example 4 An acid waste solution containing 1.07N of iron sulfate and 2.16N of sulfuric acid was treated according to the flow sheet shown in FIG. 1, and sulfuric acid and metals were separated and recovered. The diffusion dialysis tank (1) is Neo Sebuta AFN (manufactured by Toku 111 Soda ■, strong basic anion exchange membrane)
Diffusion dialysis device TSD divided into a diffusion chamber and a dialysis chamber by
-2 type manufactured by Tokuyama Soda (effective membrane area: 2 dm2) was used. The ion exchange membrane electrodialysis device (Ill) and the neutralization precipitation separation device were the same as in Example 1. In the diffusion dialysis tank (1), water at 30'C was supplied from the upper part to the diffusion chamber at a rate of 0-6Q/fir, and the above acid waste solution was supplied from the lower part to the dialysis chamber at a rate of 0.6 < 1/llr. . As a result, an acid solution containing 2N sulfuric acid and 0.1N iron sulfate was recovered from the diffusion chamber 1, and a deoxidized waste solution containing 0.1N sulfuric acid and 0.97N iron sulfate was discharged from the dialysis chamber 2. .
次いで、上記の脱酸した廃液を中和沈殿分離工程（ＩＩ
）へ供給し、まず中和槽で水酸化ナトリウムを用いて中
和させた後、沈殿槽に送り固体と液分とに分離し、底部
に集まった固形分は濃縮槽に１４１泥され、真空濾過基
によって脱水処理を行いスラッジとして得た。一方中和
濾液は１．５Ｃｌ／ｈて電気透析槽（１■）の中間室に
供給した。電気透析槽（ｍ ）においては、温度；（５
℃平平均法流密Ｆ５Ａ／ｄｍ２て運転した。その結果、
硫酸；（，５規定および水酸化ナトリウム３３．６規定
の再生液が得られた。この再生した酸は、再生酸として
循環使用し、また再生アルカリは中和沈殿分離工程の中
和剤として使用した。Next, the deoxidized waste liquid is subjected to a neutralization precipitation separation step (II
), first neutralized using sodium hydroxide in a neutralization tank, then sent to a settling tank to separate solids and liquids, solids collected at the bottom are concentrated in a thickening tank, and then vacuum Dehydration treatment was performed using a filtration group to obtain a sludge. On the other hand, the neutralized filtrate was supplied at 1.5 Cl/h to the intermediate chamber of the electrodialysis tank (1■). In the electrodialyzer (m ), the temperature is (5
It was operated at a mean flow density of F5A/dm2. the result,
A regenerated solution of sulfuric acid; did.
第１図は本発明のフローを示し、Ｉは脱酸工程のイオン
交換膜電気透析装置、拡散透析装置、！１は中和沈殿分
離工程の装置、１■は酸およびアルカリ再生工程におけ
るイオン交換膜電気透析装置である。１および２はイオ
ン交換膜電気透析装置および拡散透析装置（Ｉ）の脱酸
室（透析室）および濃縮室（拡散室）である。；１．４
および５はイオン交換膜電気透析装置（Ｉｌｌ ）にお
ける陰イオン交換膜、バイポーラ膜および陽イオン交換
膜、６．７およびＦ（は中間室（複分解室）、酸生成室
およびアルカリ生成室である。９は廃酸液（原液）、１
０は脱酸液、１１はイオン交換膜電気透析装置（［）に
おける再生酸液、１２はイオン交換膜電解槽（ＩＩＩ
）における再生アルカリ液、１３３は中和、沈殿分離装
置（ｍ）からのスラッジあるいはスラリー、１４は中和
濾液、１５はキレート樹脂塔、１６および１７はイオン
交換膜電気透析槽（ＩＩＩ ）におけるそれぞれ再生酸
液と脱塩液を示す。
第２図は中和沈殿分離装置（Ｉ■）の代表例なフロー図
であり、１Ｂは中和槽、１９は沈殿槽、２゜は濃縮槽、
２１は真空濾過剤、２２は中和液、２３はスラリー、２
４はスラッジ、２５は固形分を示す。FIG. 1 shows the flow of the present invention, where I is an ion exchange membrane electrodialysis device, a diffusion dialysis device, and a diffusion dialysis device in the deoxidizing step. 1 is an apparatus for the neutralization precipitation separation process, and 1■ is an ion exchange membrane electrodialysis apparatus for the acid and alkali regeneration process. 1 and 2 are a deoxidizing chamber (dialysis chamber) and a concentration chamber (diffusion chamber) of an ion exchange membrane electrodialysis device and a diffusion dialysis device (I). ;1.4
and 5 are the anion exchange membrane, bipolar membrane and cation exchange membrane in the ion exchange membrane electrodialyzer (Ill), 6.7 and F (are the intermediate chamber (metathesis chamber), acid generation chamber and alkali generation chamber. 9 is waste acid solution (undiluted solution), 1
0 is a deoxidizing solution, 11 is a regenerated acid solution in an ion exchange membrane electrodialysis device ([), and 12 is an ion exchange membrane electrolytic cell (III
), 133 is the sludge or slurry from the neutralization and precipitation separator (m), 14 is the neutralized filtrate, 15 is the chelate resin tower, 16 and 17 are the ion exchange membrane electrodialysis tank (III), respectively. Regenerated acid solution and desalination solution are shown. Figure 2 is a typical flow diagram of the neutralization precipitation separation device (I■), where 1B is a neutralization tank, 19 is a settling tank, 2° is a concentration tank,
21 is a vacuum filtration agent, 22 is a neutralizing liquid, 23 is a slurry, 2
4 indicates sludge, and 25 indicates solid content.
Claims (1)
膜電気透析装置または拡散透析装置により脱酸する工程
（Ａ）脱酸液を中和、沈殿分離する工程（Ｂ）、中和沈
殿分離した濾液をバイポーラ膜と陰、陽イオン交換膜の
組合せてなるイオン交換膜電気透析装置により酸とアル
カリに再生する工程（Ｃ）からなる酸廃液の再生方法。1) A step of deoxidizing an acid waste solution containing mineral acids and their metal salts using an ion exchange membrane electrodialysis device or a diffusion dialysis device (A) A step of neutralizing and precipitating and separating the deacidifying solution (B) Neutralization and precipitation A method for regenerating acid waste liquid comprising a step (C) of regenerating the separated filtrate into acid and alkali using an ion exchange membrane electrodialysis device comprising a combination of a bipolar membrane and an anion and cation exchange membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12374387A JPS63291608A (en) | 1987-05-22 | 1987-05-22 | System for regenerating acidic waste liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12374387A JPS63291608A (en) | 1987-05-22 | 1987-05-22 | System for regenerating acidic waste liquid |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8155684A Division JP2711241B2 (en) | 1996-06-17 | 1996-06-17 | Acid waste liquid regeneration method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63291608A true JPS63291608A (en) | 1988-11-29 |
| JPH0532088B2 JPH0532088B2 (en) | 1993-05-14 |
Family
ID=14868228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12374387A Granted JPS63291608A (en) | 1987-05-22 | 1987-05-22 | System for regenerating acidic waste liquid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63291608A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5240579A (en) * | 1991-03-14 | 1993-08-31 | Yeda Research And Development Company Ltd. | Electrodialysis reversal process and apparatus with bipolar membranes |
| WO1999014165A1 (en) * | 1997-09-12 | 1999-03-25 | Steuler Industriewerke Gmbh | Method for treating metal containing acid solutions from surface treatment installations |
| WO2002048044A3 (en) * | 2000-12-12 | 2002-09-12 | Jurag Separation Aps | A method and apparatus for isolation of ionic species by electrodialysis |
| JP2003071457A (en) * | 2001-09-04 | 2003-03-11 | Maezawa Ind Inc | Method for recovering mineral acid from mixed acid of boric acid and mineral acid |
| KR100402824B1 (en) * | 2001-04-03 | 2003-10-22 | 강봉규 | The wastewater treatment method for lead removal process of pipe fitting made into bronze and brase |
| JP2005052794A (en) * | 2003-08-07 | 2005-03-03 | Shigeru Kitani | Method and apparatus for treating aqueous solution |
| JP2006131982A (en) * | 2004-11-09 | 2006-05-25 | Jfe Steel Kk | Treatment method for pickling waste solution and treatment device for pickling waste solution |
| WO2009022572A1 (en) * | 2007-08-10 | 2009-02-19 | Astom Corporation | Method of recovering acid from acid waste liquid |
| JP2010059521A (en) * | 2008-09-05 | 2010-03-18 | Ebara Engineering Service Co Ltd | Method and apparatus for removing and recovering copper from copper-containing acidic waste liquid |
| JP2010260009A (en) * | 2009-05-08 | 2010-11-18 | Nosaka Denki:Kk | Acid concentrating method |
| CN105084600A (en) * | 2015-08-28 | 2015-11-25 | 浙江奇彩环境科技有限公司 | Method for efficiently treating salt-containing organic wastewater and application of method |
| JP2016030847A (en) * | 2014-07-29 | 2016-03-07 | 住友金属鉱山株式会社 | Method for purifying cobalt chloride solution |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62502695A (en) * | 1985-05-03 | 1987-10-15 | ザ・グレーバー・カンパニー | Recovery of mixed acids from mixed salts |
| JPH02500420A (en) * | 1986-10-14 | 1990-02-15 | ザ・グレーバー・カンパニー | How to recover acids from substances containing acids and salts |
-
1987
- 1987-05-22 JP JP12374387A patent/JPS63291608A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62502695A (en) * | 1985-05-03 | 1987-10-15 | ザ・グレーバー・カンパニー | Recovery of mixed acids from mixed salts |
| JPH02500420A (en) * | 1986-10-14 | 1990-02-15 | ザ・グレーバー・カンパニー | How to recover acids from substances containing acids and salts |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5240579A (en) * | 1991-03-14 | 1993-08-31 | Yeda Research And Development Company Ltd. | Electrodialysis reversal process and apparatus with bipolar membranes |
| WO1999014165A1 (en) * | 1997-09-12 | 1999-03-25 | Steuler Industriewerke Gmbh | Method for treating metal containing acid solutions from surface treatment installations |
| US7704361B2 (en) | 2000-12-12 | 2010-04-27 | Jurag Separation A/S | Method and apparatus for isolation of ionic species from a liquid |
| WO2002048044A3 (en) * | 2000-12-12 | 2002-09-12 | Jurag Separation Aps | A method and apparatus for isolation of ionic species by electrodialysis |
| KR100402824B1 (en) * | 2001-04-03 | 2003-10-22 | 강봉규 | The wastewater treatment method for lead removal process of pipe fitting made into bronze and brase |
| JP2003071457A (en) * | 2001-09-04 | 2003-03-11 | Maezawa Ind Inc | Method for recovering mineral acid from mixed acid of boric acid and mineral acid |
| JP2005052794A (en) * | 2003-08-07 | 2005-03-03 | Shigeru Kitani | Method and apparatus for treating aqueous solution |
| JP2006131982A (en) * | 2004-11-09 | 2006-05-25 | Jfe Steel Kk | Treatment method for pickling waste solution and treatment device for pickling waste solution |
| JP4544970B2 (en) * | 2004-11-09 | 2010-09-15 | Ｊｆｅスチール株式会社 | Processing method for pickling waste liquid and processing equipment for pickling waste liquid |
| JP2009039672A (en) * | 2007-08-10 | 2009-02-26 | Astom:Kk | Recovery method of acid from fluoronitric acid waste liquid |
| WO2009022572A1 (en) * | 2007-08-10 | 2009-02-19 | Astom Corporation | Method of recovering acid from acid waste liquid |
| JP2010059521A (en) * | 2008-09-05 | 2010-03-18 | Ebara Engineering Service Co Ltd | Method and apparatus for removing and recovering copper from copper-containing acidic waste liquid |
| JP2010260009A (en) * | 2009-05-08 | 2010-11-18 | Nosaka Denki:Kk | Acid concentrating method |
| JP2016030847A (en) * | 2014-07-29 | 2016-03-07 | 住友金属鉱山株式会社 | Method for purifying cobalt chloride solution |
| CN105084600A (en) * | 2015-08-28 | 2015-11-25 | 浙江奇彩环境科技有限公司 | Method for efficiently treating salt-containing organic wastewater and application of method |
| CN105084600B (en) * | 2015-08-28 | 2017-11-24 | 浙江奇彩环境科技股份有限公司 | A kind of method and its application of efficient process salt-containing organic wastewater |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0532088B2 (en) | 1993-05-14 |
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