JPH02102779A - Pretreatment of seawater in vaporization-type seawater desalination device - Google Patents
Pretreatment of seawater in vaporization-type seawater desalination deviceInfo
- Publication number
- JPH02102779A JPH02102779A JP63255841A JP25584188A JPH02102779A JP H02102779 A JPH02102779 A JP H02102779A JP 63255841 A JP63255841 A JP 63255841A JP 25584188 A JP25584188 A JP 25584188A JP H02102779 A JPH02102779 A JP H02102779A
- Authority
- JP
- Japan
- Prior art keywords
- seawater
- amidoxime
- chelate resin
- adsorption tower
- magnesium ions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000013535 sea water Substances 0.000 title claims abstract description 101
- 238000010612 desalination reaction Methods 0.000 title claims description 26
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229910001424 calcium ion Inorganic materials 0.000 claims abstract description 39
- 229910001425 magnesium ion Inorganic materials 0.000 claims abstract description 39
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 36
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000003463 adsorbent Substances 0.000 claims abstract description 22
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 18
- 239000010936 titanium Substances 0.000 claims abstract description 18
- 239000011347 resin Substances 0.000 claims description 39
- 229920005989 resin Polymers 0.000 claims description 39
- 239000013522 chelant Substances 0.000 claims description 34
- SFZULDYEOVSIKM-UHFFFAOYSA-N chembl321317 Chemical compound C1=CC(C(=N)NO)=CC=C1C1=CC=C(C=2C=CC(=CC=2)C(=N)NO)O1 SFZULDYEOVSIKM-UHFFFAOYSA-N 0.000 claims description 20
- 239000007864 aqueous solution Substances 0.000 claims description 17
- 239000002131 composite material Substances 0.000 claims description 17
- 230000002378 acidificating effect Effects 0.000 claims description 15
- 238000002203 pretreatment Methods 0.000 claims description 9
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 5
- 239000011575 calcium Substances 0.000 claims description 5
- 238000001179 sorption measurement Methods 0.000 abstract description 39
- 238000000034 method Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 229920001429 chelating resin Polymers 0.000 abstract 2
- 238000011033 desalting Methods 0.000 abstract 1
- 238000009792 diffusion process Methods 0.000 abstract 1
- 230000008929 regeneration Effects 0.000 description 12
- 238000011069 regeneration method Methods 0.000 description 12
- 238000010790 dilution Methods 0.000 description 7
- 239000012895 dilution Substances 0.000 description 7
- 238000001704 evaporation Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 3
- 238000003795 desorption Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910052925 anhydrite Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000012267 brine Substances 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000003014 ion exchange membrane Substances 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 238000002336 sorption--desorption measurement Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
Landscapes
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Water Treatment By Sorption (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は海水から蒸留法により純水を製造する海水淡水
化装置の海水前処理方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a seawater pretreatment method for a seawater desalination apparatus that produces pure water from seawater by a distillation method.
海水から蒸留法により純水を製造する海水淡水化装置に
は、多段フラッシュ蒸発法と多重効用缶式蒸発法がある
。どちらの装置も海水より展進された純水のコストを低
下させるＫは、海水を蒸発させる最高温度を高くするか
、又は海水の濃縮比を大きくする必要がある。しかし、
海水を蒸発させる最高温度と海水の濃縮比は、れている
。Seawater desalination equipment that produces pure water from seawater by distillation includes a multi-stage flash evaporation method and a multi-effect can evaporation method. Both devices require a higher maximum temperature for evaporating seawater or a higher concentration ratio of seawater in order to lower the cost of pure water developed from seawater. but,
The maximum temperature at which seawater evaporates and the concentration ratio of seawater are given below.
純水の製造コストを低下させるために１海水中に硫酸等
の酸を混合し海水のＰＨを小さくして、ｃａｃｏｓとＭ
９（ＯＨ）を等のスケールを防止する方法、又は、スケ
ール防止用の薬剤を添加してスケールを防止する方はが
実用化されている。In order to reduce the production cost of pure water, acids such as sulfuric acid are mixed in seawater to lower the pH of the seawater, and cacos and M
A method of preventing scale using 9(OH), or a method of preventing scale by adding a scale-preventing agent has been put into practical use.
しかし、それらの方法は、海水からのＣａＳＯ４スケー
ル析出防止とはならず、従来は、海水を蒸発させる最高
温度および海水の濃縮比は、海水からのＣａ Ｓ ０４
スケールが析出しない温度および濃縮比に調整されてい
る。However, these methods do not prevent CaSO4 scale precipitation from seawater, and conventionally, the maximum temperature for evaporating seawater and the concentration ratio of seawater are set to prevent CaSO4 scale precipitation from seawater.
The temperature and concentration ratio are adjusted so that scale does not precipitate.
また、海水中のカルシウムイオンおよびマグネシウムイ
オンを除去するために、イオン交換膜による海水中のカ
チオンとアニオンとの分離法およびイオン交換樹脂によ
るカルシウムイオンとマグネシウムイオンとの分離法が
検討されたが、海水中に溶存する４ ００ ｐｐｍのカ
ルシウムイオンと１２７０ ｐｐｍのマグネシウムイオ
ンを分離するためにスケールに対して問題の無い１）０
５６０ｐｐのナトリウムイオンも分離する必要があり、
そのため分離コストが高くつくという問題点があった。In addition, in order to remove calcium and magnesium ions from seawater, methods for separating cations and anions in seawater using ion exchange membranes and methods for separating calcium and magnesium ions using ion exchange resins have been investigated. 1) 0 without scale problems to separate 400 ppm calcium ions and 1270 ppm magnesium ions dissolved in seawater.
It is also necessary to separate 560 pp of sodium ions.
Therefore, there was a problem that the separation cost was high.
本発明は、海水中のカルシウムイオンとマグネシウムイ
オンとを選択的に分離することにより、蒸発法海水淡水
化装置でのＣａＣＯ５＋ Ｍ９ （ＯＨ）ｔ ＊ＣａＳ
Ｏ４スケールの生成を防止し、従来よシも海水の最高蒸
発温度を高くし、海水濃縮比を大きくすることができ、
純水の製造コストを下げることができる蒸発法海水淡水
化装置の海水前処理方法を提供しようとするものである
。The present invention selectively separates calcium ions and magnesium ions in seawater, thereby reducing CaCO5+ M9 (OH)t *CaS in evaporative seawater desalination equipment.
It prevents the formation of O4 scale, increases the maximum evaporation temperature of seawater, and increases the seawater concentration ratio compared to conventional methods.
The present invention aims to provide a seawater pretreatment method for an evaporative seawater desalination apparatus that can reduce the production cost of pure water.
本発明は、次の蒸発性海水淡水装置の海水前処理法に係
るものである。The present invention relates to the following seawater pretreatment method for an evaporative seawater freshwater apparatus.
（１） 蒸発法海水淡水化装置に供給する海水を、ア
ミドキシム型キレート樹脂と接触させ、上記アミドキシ
ム型キレート樹脂に海水中釦溶存しているカルシウムイ
オン及びマグネシウムイオンを選択的に吸着させること
を特徴とする蒸発法海水淡水化装置の海水前処理方法。(1) The seawater supplied to the evaporative seawater desalination device is brought into contact with an amidoxime type chelate resin, and calcium and magnesium ions dissolved in the seawater are selectively adsorbed by the amidoxime type chelate resin. Seawater pretreatment method for evaporative seawater desalination equipment.
（２）蒸発法海水淡水化装置に供給する海水を、チタン
−活性炭系複合吸着剤と接触させ、上記チタン−活性炭
系複合吸着剤に海水中に溶存しているカルシウムイオン
及びマグネシウムイオン舎選択的に吸着させることを特
徴とする蒸発法海水淡水化装置の海水前処理方法。(2) The seawater supplied to the evaporation method seawater desalination equipment is brought into contact with a titanium-activated carbon composite adsorbent, and the calcium ions and magnesium ions dissolved in the seawater are selectively absorbed by the titanium-activated carbon composite adsorbent. A seawater pretreatment method for an evaporative seawater desalination device, which is characterized by adsorbing the seawater to the water.
（３）上記カルシウムイオン及び上記マグネシウムイオ
ンを吸着した上記アミドキシム型キレート樹脂又はチタ
ン−活性炭系複合吸着剤を水または酸性の水溶液と接触
させることＫより上記カルシウムイオン及び上記マグネ
シウムイオンを上記アミドキシム型キレート樹脂又はチ
タン−活性炭系複合吸着剤から脱着させることを特徴と
する請求項（１）又は（２）に記載の蒸発法海水淡水化
装置の海水前処理方法。(3) Contacting the amidoxime type chelate resin or titanium-activated carbon composite adsorbent adsorbing the calcium ions and magnesium ions with water or an acidic aqueous solution. The seawater pretreatment method for an evaporative seawater desalination apparatus according to claim 1 or 2, wherein the seawater is desorbed from a resin or a titanium-activated carbon composite adsorbent.
本発明では、蒸発法海水淡水化装置に供給する海水を、
アミドキシム型キレート樹脂又はチタン−活性炭系複合
吸着剤と接触させることによって、海水中に溶存してい
るカルシウムイオン及びマグネシウムイオンが選択的に
アミドキシム型キレート樹脂又はチタン−活性炭系複合
吸着剤に吸着される。これによって、海水淡水化装置に
供給されるカルシウムイオン及びマグネシウムイオンの
濃度が低下し、海水淡水化装置における海水の蒸発温１
度及び濃縮比を上げることができる。In the present invention, the seawater to be supplied to the evaporative seawater desalination apparatus is
Calcium ions and magnesium ions dissolved in seawater are selectively adsorbed by the amidoxime-type chelate resin or titanium-activated carbon-based composite adsorbent by contacting with the amidoxime-type chelate resin or titanium-activated carbon-based composite adsorbent. . As a result, the concentration of calcium ions and magnesium ions supplied to the seawater desalination equipment decreases, and the evaporation temperature of seawater in the seawater desalination equipment decreases.
The concentration and concentration ratio can be increased.
また、本発明では、カルシウムイオン及びマグネシウム
イオンを吸着した上記アミドキシム型キレート樹脂又は
チタン−活性炭系複合吸着剤を水又は酸性水溶液と接触
させてカルシウムイオン及びマグネシウムイオンを脱着
して分離し、アミドキシムをキレート樹脂又はチタン−
活性炭系複合吸着剤の再生が行なわれる。Furthermore, in the present invention, the above amidoxime type chelate resin or titanium-activated carbon composite adsorbent adsorbing calcium ions and magnesium ions is brought into contact with water or an acidic aqueous solution to desorb and separate the calcium ions and magnesium ions, thereby producing amidoxime. Chelate resin or titanium
The activated carbon-based composite adsorbent is regenerated.
本発明の第一実施例を第１図によって説明する。 A first embodiment of the present invention will be described with reference to FIG.
アミドキシム型キレート樹脂又はチタン−活性炭系複合
吸着剤ｌ（以下アミドキシム型キレート樹脂等という）
が吸着塔２に納められている。海水１０は分散板２ｂを
通過して吸着塔２内に導入される。海水１０によジアミ
ドキシム型キレート樹脂等１は流動化されつつ海水１０
と接触する。海水ｌＯ中のカルシウムイオンとマグネシ
ウムイオンとがアミドキシム型キレート樹脂等１に選択
的に吸着され、カルシウムイオンとマグネシウムイオン
濃度の低下した海水は、船己管１）を経て吸着塔２から
海水淡水化装置３へ供給される。海水淡水化装置３では
純水１３が製造され、残りの塩濃度が濃縮され九海水は
ブライン１２として放出される。Amidoxime-type chelate resin or titanium-activated carbon composite adsorbent (hereinafter referred to as amidoxime-type chelate resin, etc.)
is stored in the adsorption tower 2. The seawater 10 passes through the dispersion plate 2b and is introduced into the adsorption tower 2. Diamidoxime type chelate resin etc. 1 is fluidized by seawater 10 while being fluidized by seawater 10
come into contact with. Calcium ions and magnesium ions in seawater 1O are selectively adsorbed by amidoxime-type chelate resin etc. 1, and the seawater with a reduced concentration of calcium ions and magnesium ions passes through the ship's own pipe 1) and is desalinated from the adsorption tower 2. Supplied to device 3. In the seawater desalination device 3, pure water 13 is produced, the remaining salt concentration is concentrated, and nine seawater is discharged as brine 12.
カルシウムイオンとマグネシウムイオントラ吸着したア
ミドキシム型キレート樹脂等は、連絡管２ｄ内を樹脂移
動水１７にょシ吸着塔２がら再生塔２ａへ制御されなが
ら移動される。再生塔２ａに入ったアミドキシム型キレ
ート樹脂等１ａは再生塔２ａでＰＨを変化させることＫ
よりカルシウムイオンとマグネシウムイオンとを脱着す
る。カルシウムイオンとマグネシウムイオンとの吸着能
力を回珈したアミドキシム型キレート樹脂１ａは、連絡
管２ｅ内を樹脂移動水１７により再生塔２ａから吸着塔
１へ制御されながら移動される。Amidoxime-type chelate resin and the like adsorbed with calcium ions and magnesium ions are transferred in a controlled manner through the resin transfer water 17 and the adsorption tower 2 to the regeneration tower 2a in the communication pipe 2d. The pH of the amidoxime-type chelate resin 1a that has entered the regeneration tower 2a is changed in the regeneration tower 2a.
Desorbs calcium ions and magnesium ions. The amidoxime type chelate resin 1a, which has recovered its ability to adsorb calcium ions and magnesium ions, is transferred from the regeneration tower 2a to the adsorption tower 1 in a controlled manner by the resin transfer water 17 in the communication pipe 2e.
上記再生塔２ａ内へは、酸性水溶液１４と、酸性水溶液
１４を希釈してＰ）（を調整するために１再生塔２ａの
排出水１６を一部循壇した希釈水１５を混合して分散板
２ｃを通して供給する。上記酸性水溶液１４の希釈度は
、再生塔２ａに入る液のＰＨが５以下になるように設定
される。Into the regeneration tower 2a, the acidic aqueous solution 14 and the dilution water 15 which is partially circulated from the discharged water 16 of the regeneration tower 2a are mixed and dispersed in order to dilute the acidic aqueous solution 14 and adjust P). It is supplied through the plate 2c.The degree of dilution of the acidic aqueous solution 14 is set so that the pH of the liquid entering the regeneration tower 2a is 5 or less.
以上のように１本実施例において、アミドキシム型キレ
ート樹脂等ＩＦｉ、カルシウムイオンとマグネシウムイ
オンを吸着塔２で吸着し、再生塔２ａで脱着を繰り返す
ことにょシ海水中から連続的にカルシウムイオンとマグ
ネシウムイオンを分離することができる。上記工程でア
ミドキシム型キレート樹脂等１が消耗するが、その消耗
に応じて吸着塔２へ新しいアミドキシム型キレート樹脂
等１８が供給される。As described above, in this embodiment, calcium ions and magnesium ions are adsorbed in the adsorption tower 2, and desorption is repeated in the regeneration tower 2a, so that calcium ions and magnesium ions are continuously extracted from the seawater. Ions can be separated. Although the amidoxime type chelate resin etc. 1 is consumed in the above process, new amidoxime type chelate resin etc. 18 is supplied to the adsorption tower 2 in accordance with the consumption.
本発明の第二実施例を第２図によって説明する。本実施
例では、上記第一実施例の排水１６に代えて海水淡水化
装置３の製造水１３を両生塔２ａに供給して、この中性
の製造水によってアミドキシム型キレート樹脂等のカル
シウムイオン及びマグネシウムイオンの脱着を行なうよ
うにしたものである。なお、本実施例において、海水淡
水化装置の製造水に代えて、吸着塔２を出る海水１）を
用いるようにしてもよい。A second embodiment of the present invention will be described with reference to FIG. In this embodiment, the produced water 13 of the seawater desalination apparatus 3 is supplied to the amphibious tower 2a instead of the waste water 16 of the first embodiment, and this neutral produced water is used to generate calcium ions such as amidoxime-type chelate resin and the like. It is designed to desorb magnesium ions. In this embodiment, the seawater 1) exiting the adsorption tower 2 may be used instead of the water produced by the seawater desalination apparatus.
本発明の第三実施例を第３図によって説明する。A third embodiment of the present invention will be described with reference to FIG.
アミドキシム型キレート樹脂等１は２塔の吸着塔８ａ、
８ｂＫ納められている。同吸着塔８ａ、８ｂの各々には
海水１０の供給管］Ｏａ。Amidoxime type chelate resin etc. 1 has two adsorption towers 8a,
It contains 8bK. Each of the adsorption towers 8a and 8b has a seawater 10 supply pipe]Oa.
１０ｂが開口しておシ、同供給管１０ａ、１０ｂＫは、
それぞれバルブ４ａ、４ｂが設けられている。10b is opened, and the supply pipes 10a and 10bK are
Valves 4a and 4b are provided respectively.
また、吸着塔８ａ、８ｂには、弁６ａ、６ｂをもつ排出
配管１６ａ、１６ｂ、弁７ａ、７ｂをもち酸性水溶液１
４の供給管１４ＣＫ接続され次配管１４ａ、１４ｂ、及
び弁５ａ、５ｂをもつ海水の送出配管１）ａ、ｌｌｂが
設けられている。上記排出配管１６ａ、１６ｂが合流す
る排出管１６ｃから希釈水配管１５が分岐し、同配管１
５は上記酸性水溶液の供給管１４ ｃＫ接続されている
。ま次上記海水の送出配管１）ａｓｌｌｂは海水淡水化
装置３に接続された海水の送出管１）に接続されている
。なお、本実施例においても、上記第一の実施例と同様
に１配管１４ａ、１４ｂより吸着脱８ａ、８ｂに供給さ
れる液のＰＨは５以下になるように設定される。In addition, the adsorption towers 8a and 8b have discharge pipes 16a and 16b having valves 6a and 6b, and valves 7a and 7b, and the acidic aqueous solution 1
Seawater delivery pipes 1)a and llb are connected to the supply pipe 14CK of No. 4 and have secondary pipes 14a, 14b, and valves 5a, 5b. A dilution water pipe 15 branches from a discharge pipe 16c where the discharge pipes 16a and 16b meet, and the same pipe 1
5 is connected to the supply pipe 14 cK for the acidic aqueous solution. The seawater delivery pipe 1) asllb is connected to the seawater delivery pipe 1) connected to the seawater desalination device 3. In this embodiment as well, the pH of the liquid supplied to the adsorption/desorption units 8a and 8b from the pipes 14a and 14b is set to be 5 or less, as in the first embodiment.
本実施例では、弁４ａ開、弁６ａ閉、弁５ａ開、弁７ａ
閉の状態にすることによシ、海水ｌＯを吸着塔８ａへ導
入し、海水中のカルシウムイオンとマグネシウムイオン
をアミドキシム型キレート樹脂等１）Ｃ１＆着し、カル
シウムイオンとマグネシウムイオン濃度の低下した海水
を製造し、これを配管１）ａ及び管１）を経て海水淡水
化装置３へ供給する。In this embodiment, valve 4a is open, valve 6a is closed, valve 5a is open, valve 7a is
By keeping the closed state, seawater lO is introduced into the adsorption tower 8a, and the calcium ions and magnesium ions in the seawater are attached to amidoxime type chelate resin, etc. is produced and supplied to the seawater desalination device 3 via pipe 1)a and pipe 1).
海水１０を吸着塔８ａへ通水している場合、吸着塔８ｂ
では、弁４ｂ閉、弁６ｂ開、弁５ｂ閉、弁７ｂ開の状態
として、酸性水溶液１４と酸性水溶液１４のＰＨを上記
５以下にするための希釈水１５を混合した水溶液を吸着
塔８ｂへ供給する。この希釈水１５としては、配管１６
ｂ１配管１５を経て酸性水溶液の供給管１４ｃへ供給さ
れる吸着塔８ｂの排水１６を循環して用いる。これによ
って、吸着塔８ｂにおいては、吸着塔８ａにおいて海水
中のカルシウムイオンとマグネシウムイオンが吸着され
ているときに、同時に同吸着塔８ｂ内のアミドキシム型
キレート樹脂等１かもカルシウムイオンとマグネシウム
イオンの脱着が行なわれる。When the seawater 10 is flowing to the adsorption tower 8a, the adsorption tower 8b
Now, with valve 4b closed, valve 6b open, valve 5b closed, and valve 7b open, an aqueous solution containing the acidic aqueous solution 14 and dilution water 15 to make the pH of the acidic aqueous solution 14 below 5 is sent to the adsorption tower 8b. supply As this dilution water 15, piping 16
The waste water 16 of the adsorption tower 8b, which is supplied to the acid aqueous solution supply pipe 14c via the b1 pipe 15, is circulated and used. As a result, in the adsorption tower 8b, when calcium ions and magnesium ions in seawater are being adsorbed in the adsorption tower 8a, at the same time, calcium ions and magnesium ions are desorbed from the amidoxime type chelate resin, etc. in the adsorption tower 8b. will be carried out.
なお、吸着塔８ｂＫ供給する希釈水として、吸着塔８ａ
で処理された海水の１部を使用してもよい。In addition, as the dilution water supplied to the adsorption tower 8bK, the adsorption tower 8a
A portion of the treated seawater may also be used.
吸着塔８ａ内のアミドキシム型゛キレート樹脂等１が、
その吸着能力までカルシウムイオンとマグネシウムイオ
ンを吸着し、吸着塔８ｂ内のアミドキシム型キレート樹
脂等１のカルシウムイオンとマグネシウムイオンとの吸
着能力の再生が完了したら、弁４ａ閉、弁４ｂ開、弁５
ａ閉、弁５ｂ開、弁６ａ開、弁６ｂ閉、弁７ａ開、弁７
ｂ閉の状態にして、海水１０を吸着塔８ｂへ、酸性水溶
液】４とその希釈水１５を吸着塔８ａＫ通水して、吸着
塔８ｂで海水からのカルシウムイオンとマグネシウムイ
オンを吸着し、吸着塔８ａでアミドキシム型キレート樹
脂等１からのカルシウムイオンとマグネシウムイオンの
脱着が行なわれる。The amidoxime type chelate resin etc. 1 in the adsorption tower 8a is
When calcium ions and magnesium ions are adsorbed to that adsorption capacity and the adsorption capacity of amidoxime type chelate resin 1 in adsorption tower 8b for calcium ions and magnesium ions has been regenerated, valve 4a is closed, valve 4b is opened, and valve 5 is completely regenerated.
a closed, valve 5b open, valve 6a open, valve 6b closed, valve 7a open, valve 7
With b closed, seawater 10 is passed through the adsorption tower 8b, acidic aqueous solution 4 and its diluted water 15 are passed through the adsorption tower 8aK, and the adsorption tower 8b adsorbs calcium and magnesium ions from the seawater. Calcium ions and magnesium ions are desorbed from the amidoxime type chelate resin 1 in the column 8a.
以上のように吸着ｊｑｉ８ａ、８ｂを切シ替えて使用す
ることにより、海水１０からカルシウムイオンとマグネ
シウムイオン濃度の低下した海水を連続的に製造するこ
とができる。By switching and using the adsorption jqi 8a and 8b as described above, it is possible to continuously produce seawater with a reduced concentration of calcium ions and magnesium ions from the seawater 10.
本発明の第四実施例を第４図によって説明する。A fourth embodiment of the present invention will be described with reference to FIG.
比し
本実施例は、上記第三実施例に参≠て吸着塔２：８ａ′
または吸着塔８ｂにおいてアミドキシム型キレート樹脂
等１からのカルシウムイオンとマグネシウムイオンの脱
着に海水淡水化装置３で製造した純水１３を配管１４ａ
、１４ｂを経て吸着塔８ａまたは吸着塔８ｂＫ供給して
使用するという点が異なっておシ、他は上記第三実施例
におけると同一である。In contrast, in this example, referring to the third example above, the adsorption tower 2:8a'
Alternatively, in the adsorption tower 8b, pure water 13 produced in the seawater desalination equipment 3 is used for desorption of calcium ions and magnesium ions from the amidoxime-type chelate resin, etc. 1 in the pipe 14a.
, 14b, and is used by supplying the adsorption tower 8a or 8bK to the adsorption tower 8a or 8b, but the rest is the same as in the third embodiment.
本発明者の実験によれば、第−及び第三実施例における
ように、カルシウムイオン及びマグネシウムイオンのア
ミドキシム型キレート樹脂又はチタン−活性炭系複合吸
着剤からの脱着をＰＨ５以下の酸性水溶液内で行うこと
によって、再生後の吸着剤重量Ｔｏたりのカルシウムイ
オン及びマグネシウムイオンの吸着量が増加することが
判明した。According to the experiments of the present inventor, as in the first and third embodiments, desorption of calcium ions and magnesium ions from amidoxime-type chelate resin or titanium-activated carbon composite adsorbent is carried out in an acidic aqueous solution with a pH of 5 or less. It has been found that this increases the amount of calcium ions and magnesium ions adsorbed per weight To of the adsorbent after regeneration.
ま光、上記第二実施例及び第四実施例において、アミド
キシム型キレート樹脂等１を純水等の中性水で再生する
場合は、第−実施例及び第三実施例におけるように酸性
の水溶液で再生する場合に較べると、アミドキシム型キ
レート樹脂等１のカルシウムイオンとマグネシウムイオ
ンの吸着剤重量あ次りの吸着量は減少するが、再生に酸
性水溶液を使用しないのでアミドキシム型キレート樹脂
等１の再生回数あ几りの消耗率が低下する点で効果があ
る。However, in the above-mentioned second and fourth embodiments, when the amidoxime type chelate resin etc. 1 is regenerated with neutral water such as pure water, an acidic aqueous solution is used as in the first and third embodiments. Compared to the case of regeneration with amidoxime type chelate resin etc., the adsorption amount of calcium ions and magnesium ions per adsorbent weight decreases, but since no acidic aqueous solution is used for regeneration, It is effective in reducing the consumption rate of the number of plays.
本発明によれば、以上説明したように、海水淡水化装置
におけるスケール形成トラブルを防止することができ、
従来より高濃縮、高温で海水の蒸発が可能となり、これ
によって、純水製造＝ストを安価にすることができる。According to the present invention, as explained above, scale formation troubles in seawater desalination equipment can be prevented,
Seawater can be evaporated at a higher concentration and higher temperature than before, making it possible to produce pure water at a lower cost.
また、本発明では、カルシウムイオン及びマグ・ネシウ
ムイオンを吸着したアミドキシム型キレート樹脂又はチ
タン−活性炭系複合吸着剤を再生し循環して使用するこ
とができる。Furthermore, in the present invention, the amidoxime type chelate resin or the titanium-activated carbon composite adsorbent adsorbing calcium ions and magnesium ions can be regenerated and recycled for use.
第１図ないし第４図は、それぞれ本発明の第一ないし第
四実施例に用いられる装置の説明図である。
１．１ａ・・・アミドキシム型キレート樹脂又はチタン
−活性炭系複合吸着剤、２・・・吸着塔、２ａ・・・再
生塔、２ｄ、２ｅ・・・連結管、３・・・海水淡水化装
置、４ａ、 ４ｂ、 ５ａ、 ５ｂ、 ６ａ、 ６ｂ、
７ａ。
７ｂ・・・弁、ｇａ、８ｂ・・・吸着塔、１０・・・海
水、１２・・・ブライン、１３・・・純水、１４・・・
酸性水溶液、１５・・・希釈水、１６・・・排水、１７
・・・樹脂移動水、１８・・・補給されるアミドキシム
型キレート樹脂又はチタン−活性炭系複合吸着剤代理人
弁理士 坂 間 暁 外２名、＠２
１ｎ
晃３閃1 to 4 are explanatory diagrams of devices used in first to fourth embodiments of the present invention, respectively. 1.1a...Amidoxime type chelate resin or titanium-activated carbon composite adsorbent, 2...Adsorption tower, 2a...Regeneration tower, 2d, 2e...Connecting pipe, 3...Seawater desalination equipment , 4a, 4b, 5a, 5b, 6a, 6b,
7a. 7b...Valve, ga, 8b...Adsorption tower, 10...Seawater, 12...Brine, 13...Pure water, 14...
Acidic aqueous solution, 15... dilution water, 16... waste water, 17
... Resin transfer water, 18 ... Amidoxime-type chelate resin or titanium-activated carbon composite adsorbent to be replenished Patent attorney Akira Sakama and 2 others, @2
1n Akira 3sen
Claims (3)
キシム型キレート樹脂と接触させ、上記アミドキシム型
キレート樹脂に海水中に溶存しているカルシウムイオン
及びマグネシウムイオンを選択的に吸着させることを特
徴とする蒸発法海水淡水化装置の海水前処理方法。(1) The seawater supplied to the evaporative seawater desalination device is brought into contact with an amidoxime-type chelate resin, and calcium ions and magnesium ions dissolved in the seawater are selectively adsorbed by the amidoxime-type chelate resin. Seawater pretreatment method for evaporative seawater desalination equipment.
−活性炭系複合吸着剤と接触させ、上記チタン−活性炭
系複合吸着剤に海水中に溶存しているカルシウムイオン
及びマグネシウムイオンを選択的に吸着させることを特
徴とする蒸発法海水淡水化装置の海水前処理方法。(2) Seawater supplied to the evaporative seawater desalination equipment is brought into contact with a titanium-activated carbon composite adsorbent, and the titanium-activated carbon composite adsorbent selectively removes calcium and magnesium ions dissolved in the seawater. A seawater pretreatment method for an evaporative seawater desalination device, which is characterized by adsorbing the seawater to the water.
ンを吸着した上記アミドキシム型キレート樹脂又はチタ
ン−活性炭系複合吸着剤を水または酸性の水溶液と接触
させることにより、上記カルシウムイオン及び上記マグ
ネシウムイオンを上記アミドキシム型キレート樹脂又は
チタン−活性炭系複合吸着剤から脱着させることを特徴
とする請求項（１）又は（２）に記載の蒸発法海水淡水
化装置の海水前処理方法。(3) By contacting the amidoxime type chelate resin or titanium-activated carbon composite adsorbent adsorbing the calcium ions and magnesium ions with water or an acidic aqueous solution, the calcium ions and magnesium ions can be absorbed into the amidoxime type chelate resin. The seawater pretreatment method for an evaporative seawater desalination apparatus according to claim 1 or 2, wherein the seawater is desorbed from a resin or a titanium-activated carbon composite adsorbent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63255841A JPH02102779A (en) | 1988-10-13 | 1988-10-13 | Pretreatment of seawater in vaporization-type seawater desalination device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63255841A JPH02102779A (en) | 1988-10-13 | 1988-10-13 | Pretreatment of seawater in vaporization-type seawater desalination device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02102779A true JPH02102779A (en) | 1990-04-16 |
Family
ID=17284336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63255841A Pending JPH02102779A (en) | 1988-10-13 | 1988-10-13 | Pretreatment of seawater in vaporization-type seawater desalination device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02102779A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102642850A (en) * | 2012-05-14 | 2012-08-22 | 河北工业大学 | Calcium removing method in seawater potassium extraction process |
| CN109477159A (en) * | 2016-06-30 | 2019-03-15 | 小利兰·斯坦福大学托管委员会 | For extraction/removal metal ion electrochemical deposition from water |
-
1988
- 1988-10-13 JP JP63255841A patent/JPH02102779A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102642850A (en) * | 2012-05-14 | 2012-08-22 | 河北工业大学 | Calcium removing method in seawater potassium extraction process |
| CN109477159A (en) * | 2016-06-30 | 2019-03-15 | 小利兰·斯坦福大学托管委员会 | For extraction/removal metal ion electrochemical deposition from water |
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