JP2000104192A - Removing method of undesired deposit on electrode plate - Google Patents
Removing method of undesired deposit on electrode plateInfo
- Publication number
- JP2000104192A JP2000104192A JP10273454A JP27345498A JP2000104192A JP 2000104192 A JP2000104192 A JP 2000104192A JP 10273454 A JP10273454 A JP 10273454A JP 27345498 A JP27345498 A JP 27345498A JP 2000104192 A JP2000104192 A JP 2000104192A
- Authority
- JP
- Japan
- Prior art keywords
- electrode plate
- salt water
- electrolysis
- electrode
- ultrasonic
- 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.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は電気分解で電極板に
析出する不要付着物、特に次亜塩素酸ソーダを製造する
際の電極板に析出する不要付着物の除去方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing unnecessary deposits deposited on an electrode plate by electrolysis, particularly, an unnecessary deposit deposited on an electrode plate when producing sodium hypochlorite.
【０００２】[0002]
【従来の技術】電気分解により種々の電気化学製品が製
造されている。例えば次亜塩素酸ソーダは、繊維工業、
洗濯用漂白剤、家庭用消毒剤等として広く使用されてお
り、近年、塩水電解による製造が注目を集めている。2. Description of the Related Art Various electrochemical products are produced by electrolysis. For example, sodium hypochlorite is available from the textile industry,
It is widely used as a laundry bleach, a household disinfectant and the like, and in recent years, production by salt water electrolysis has attracted attention.
【０００３】塩水電解による製造では、塩水（ＮａＣｌ
＋Ｈ2Ｏ）を電解して、次亜塩素酸ソーダ（ＮａＣｌ
Ｏ）と水素（Ｈ2）を生成させるので、有害な塩素ガス
（Ｃｌ2）を一切出すことなく、次亜塩素酸ソーダ（Ｎ
ａＣｌＯ）を貯留させることができる。上記塩水電解は
食塩などの塩化アルカリの水溶液を無隔膜式電解槽を使
用して行われている。電解液として供給する塩水は濃度
が２〜４％程度の希釈塩水である。塩水濃度は高い程陽
極で発生する塩素の発生率は高いが、電気分解で製造し
た次亜塩素酸ソーダを含む塩水はそのまま水処理等に使
用されるために、濃厚な塩水を使用すれば、それだけ高
濃度の塩水が被処理水に混合されるので、好ましくな
い。In the production by salt water electrolysis, salt water (NaCl
+ H 2 O) to electrolyze sodium hypochlorite (NaCl
O) and hydrogen (H 2 ), so that no harmful chlorine gas (Cl 2 ) is emitted and sodium hypochlorite (N
aCLO) can be stored. The salt water electrolysis is performed using an aqueous solution of an alkali chloride such as salt using a diaphragm-free electrolytic cell. The salt water supplied as the electrolyte is a diluted salt water having a concentration of about 2 to 4%. The higher the salt water concentration, the higher the rate of chlorine generated at the anode, but the salt water containing sodium hypochlorite produced by electrolysis is used for water treatment as it is, so if you use concentrated salt water, Such a high concentration of salt water is mixed with the water to be treated, which is not preferable.
【０００４】そのため、通常は上記した海水の食塩濃度
程度のものが使用されている。電気分解では、陽極側で
生じた塩素ガスと陰極側で生じたアルカリとの反応によ
って次亜塩素酸ソーダが生じる。[0004] For this reason, those having a salt concentration of about the seawater described above are usually used. In the electrolysis, sodium hypochlorite is generated by a reaction between chlorine gas generated on the anode side and alkali generated on the cathode side.
【０００５】図３は塩水電解の原理の説明図である。塩
溶解槽１に投入された原塩２は水３の注入により、飽和
塩水として貯蔵される。飽和塩水３ａは所定の濃度に希
釈されて、希釈塩水３ｂが塩水電解装置４に送入され
る。送入された希釈塩水３ｂは塩水電解装置４で電気分
解により陽極５で塩素ガス（Ｃｌ2）、陰極６で水素ガ
ス（Ｈ2）と苛性ソーダ（ＮａＯＨ）が発生し、無隔膜
式を採用することによって、塩素ガス（Ｃｌ2）と苛性
ソーダ（ＮａＯＨ）が直ぐに化学反応して１％程度の次
亜塩素酸ソーダ７になる。次亜塩素酸ソーダ７は貯蔵槽
８に貯蔵され、ポンプ９により所定個所に送られる。FIG. 3 is an explanatory view of the principle of salt water electrolysis. The raw salt 2 charged into the salt dissolving tank 1 is stored as saturated salt water by injection of water 3. The saturated salt water 3a is diluted to a predetermined concentration, and the diluted salt water 3b is sent to the salt water electrolysis device 4. The supplied diluted salt water 3b is subjected to electrolysis in a salt water electrolysis device 4 to generate chlorine gas (Cl 2 ) at an anode 5 and hydrogen gas (H 2 ) and caustic soda (NaOH) at a cathode 6, and adopt a non-diaphragm type. As a result, chlorine gas (Cl 2 ) and caustic soda (NaOH) immediately undergo a chemical reaction to form sodium hypochlorite 7 of about 1%. The sodium hypochlorite 7 is stored in a storage tank 8 and sent to a predetermined location by a pump 9.
【０００６】しかし、電気分解に用いられる原塩２は、
工業的には、一般に粗製塩が使用されており、カルシウ
ムやマグネシウム等の不純物がＣａイオンやＭｇイオン
等として希釈塩水３ｂに含まれ、電気分解により陰極表
面に水酸化カルシウムや水酸化マグネシウム等の不要な
水酸化物が析出される。従来、陰極表面に析出した水酸
化物の対策には、定期的に塩酸等で酸洗を行う等の処置
がなされていた。However, the raw salt 2 used for electrolysis is
Industrially, a crude salt is generally used, and impurities such as calcium and magnesium are contained in the diluted salt water 3b as Ca ions and Mg ions and the like. Unwanted hydroxide is deposited. Conventionally, measures such as periodically pickling with hydrochloric acid or the like have been taken as measures against hydroxides deposited on the cathode surface.
【０００７】また、特開平７−２４３０７８号公報に
は、陰極基材に鉄、ステンレススチール、ニッケル等が
使用され、この陰極基材表面にポリテトラフルオロエチ
レン等のフッ素樹脂やフッ化グラファイト等のフッ化炭
素等が被覆され、被覆された電極板によって次亜塩素酸
ソーダ等のハロゲン酸塩が製造されることが開示されて
いる。上記のような撥水性物質で被覆した電極を用いる
ことによって、電気抵抗を殆ど上昇させることなく、生
成するハロゲン酸塩の還元を防止できることが開示され
ている。In Japanese Patent Application Laid-Open No. 7-243078, iron, stainless steel, nickel or the like is used for a cathode substrate, and a fluorine resin such as polytetrafluoroethylene or a graphite fluoride is coated on the surface of the cathode substrate. It is disclosed that a fluorocarbon or the like is coated and a halogenated salt such as sodium hypochlorite is produced by the coated electrode plate. It is disclosed that by using an electrode coated with a water-repellent substance as described above, reduction of a generated halogenate can be prevented with almost no increase in electric resistance.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、上述し
た陰極表面に析出した水酸化物等を定期的に塩酸等で酸
洗する等の方法では以下の問題がある。析出カルシウム
分を塩化カルシウムとして溶解し除去する方法では、生
成された塩化カルシウムは水に対する溶解度が高く、溶
解、除去を完全に行うには処理水のｐＨをできるだけ低
く、即ち塩酸等の含有量をできるだけ高くすることにな
り、そのまま系外に放流することができず、中和が必要
で繁雑である。However, the above-mentioned method of periodically pickling hydroxide or the like deposited on the cathode surface with hydrochloric acid or the like has the following problems. In the method of dissolving and removing precipitated calcium as calcium chloride, the generated calcium chloride has a high solubility in water, and in order to completely dissolve and remove calcium chloride, the pH of the treated water should be as low as possible. Since it is made as high as possible, it cannot be discharged out of the system as it is, and it is necessary to neutralize it and it is complicated.
【０００９】また、特開平７−２４３０７８号公報に開
示された技術では以下の問題がある。The technique disclosed in Japanese Patent Application Laid-Open No. 7-243078 has the following problem.
【００１０】撥水性物質で被覆した電極を用いるため
に、電極板が高価になり、また、電極板の保管、運搬等
で疵等が発生しやすく、その取扱いが煩雑である。The use of an electrode coated with a water-repellent substance makes the electrode plate expensive, and the storage and transportation of the electrode plate easily causes flaws and the like, and the handling thereof is complicated.
【００１１】本発明は、上記問題点の解決を図ったもの
であり、電気分解に通常の電極板を用いて、電極板に析
出する水酸化カルシウムや水酸化マグネシウム等の不要
付着物を軽減し、除去することのできる電極板不要付着
物の除去方法を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and uses a normal electrode plate for electrolysis to reduce unnecessary deposits such as calcium hydroxide and magnesium hydroxide deposited on the electrode plate. It is another object of the present invention to provide a method for removing unnecessary deposits on an electrode plate that can be removed.
【００１２】[0012]
【課題を解決するための手段】第一の発明は、電気分解
で電極板に析出する不要付着物を、該電極板に超音波振
動を付与して、除去させることを特徴とする電極板の不
要付着物の除去方法である。According to a first aspect of the present invention, there is provided an electrode plate, wherein unnecessary deposits deposited on an electrode plate by electrolysis are removed by applying ultrasonic vibration to the electrode plate. This is a method for removing unnecessary deposits.
【００１３】第二の発明は、無隔膜式電解槽内で食塩水
を電気分解して次亜塩素酸ソーダを製造する際に、電極
板に析出する付着物を、電極板に超音波振動を付与し
て、除去させることを特徴とする不要付着物の除去方法
である。In the second invention, when producing sodium hypochlorite by electrolyzing a saline solution in a non-diaphragm type electrolytic cell, deposits deposited on the electrode plate are subjected to ultrasonic vibration. This is a method for removing unnecessary deposits, which is provided and removed.
【００１４】第三の発明は、第一の発明または第二の発
明において、電気分解を停止して、電極板に析出した付
着物を、電極板に超音波振動を付与して、除去させるこ
とを特徴とする不要付着物の除去方法である。According to a third invention, in the first invention or the second invention, the electrolysis is stopped, and the deposits deposited on the electrode plate are removed by applying ultrasonic vibration to the electrode plate. This is a method for removing unnecessary deposits.
【００１５】本発明によれば、添加物等を用いることな
く、電気分解で電極板に析出した不要付着物を電解液ま
たは電気分解を停止した水溶液中に分散させて除去でき
る。According to the present invention, unnecessary deposits deposited on the electrode plate by electrolysis can be dispersed and removed in an electrolytic solution or an aqueous solution in which electrolysis has been stopped without using additives or the like.
【００１６】[0016]
【発明の実施の形態】以下に本発明の実施の形態を図に
よって説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.
【００１７】図１は本発明を実施するための塩水電解装
置の一実施の形態を示す平面図であり、図２は本発明の
要部を示す平面図である。図３と共通する個所には同じ
符号を用いた。FIG. 1 is a plan view showing an embodiment of a salt water electrolysis apparatus for carrying out the present invention, and FIG. 2 is a plan view showing a main part of the present invention. The same parts as those in FIG. 3 are denoted by the same reference numerals.
【００１８】符号１０は塩水電解設備で、直列に配列し
た三個の塩水電解装置１０ａ、１０ｂ、１０ｃと、それ
らの間をつなぐ三個の気液分離槽１８ａ、１８ｂ、１８
ｃで構成されている。Reference numeral 10 denotes a salt water electrolysis facility, which includes three salt water electrolyzers 10a, 10b, 10c arranged in series, and three gas-liquid separation tanks 18a, 18b, 18 connecting them.
c.
【００１９】塩水電解装置１０ａ、１０ｂ、１０ｃには
各々５枚の電極板１１が間隔をおいて配列され、塩水電
解装置１０ａ、１０ｂ、１０ｃに希釈塩水３ｂが送入さ
れる。The salt water electrolysis apparatuses 10a, 10b, and 10c each have five electrode plates 11 arranged at an interval, and the diluted salt water 3b is supplied to the salt water electrolysis apparatuses 10a, 10b, and 10c.
【００２０】塩水電解装置１０ａ、１０ｂ、１０ｃの各
両端の一方の電極板１１にはプラス（＋）の電荷が負荷
され、ターミナル陽極１１ａが形成され、他方にはマイ
ナス（−）の電荷が負荷されターミナル陰極１１ｂが形
成される。ターミナル陽極１１ａとターミナル陰極１１
ｂとの間の電極板１１は中間極１１ｃで一面が陽極にな
り、他面が陰極になる。これによって、電極板１１の対
向する面はそれぞれ陽極、陰極として希釈塩水３ｂを電
解液１２として電気分解が行われる。塩水電解装置１０
ａ、１０ｂ、１０ｃの電極板１１の数は必要に応じて適
宜選択される。通常は１３枚の電極板が用いられてい
る。符号２０は電源である。A positive (+) charge is applied to one electrode plate 11 at each end of each of the salt water electrolysis devices 10a, 10b, and 10c, a terminal anode 11a is formed, and a negative (-) charge is applied to the other. As a result, a terminal cathode 11b is formed. Terminal anode 11a and terminal cathode 11
The electrode plate 11 between the electrode b and the intermediate electrode 11c is an intermediate electrode 11c, one surface of which is an anode and the other surface is a cathode. Thus, the opposite surfaces of the electrode plate 11 are electrolyzed using the diluted saline 3b as the electrolyte 12 as the anode and the cathode, respectively. Salt water electrolysis device 10
The number of the electrode plates 11a, 10b, and 10c is appropriately selected as needed. Usually, 13 electrode plates are used. Reference numeral 20 denotes a power supply.
【００２１】本発明では塩水電解装置１０ａ内に配列さ
れた各々の電極板１１の頂部に、超音波振動子１３ａと
ホーン１３ｂからなる超音波発振器１３を取付けてい
る。In the present invention, an ultrasonic oscillator 13 including an ultrasonic vibrator 13a and a horn 13b is mounted on the top of each electrode plate 11 arranged in the salt water electrolysis apparatus 10a.
【００２２】ここでは図面の繁雑を避けるために電極板
１１の端部に示している。超音波振動子１３ａと電極板
１１頂部の間には超音波振動の付与を阻害しない図示し
ない絶縁ペースト等の絶縁体を介挿させる。また、電気
分解を停止して超音波振動を付与させる場合には、直接
接続させることもできる。Here, it is shown at the end of the electrode plate 11 to avoid complication of the drawing. An insulator such as an insulating paste (not shown) that does not hinder the application of the ultrasonic vibration is inserted between the ultrasonic transducer 13a and the top of the electrode plate 11. In the case where the electrolysis is stopped and ultrasonic vibration is applied, direct connection can be made.
【００２３】超音波発振器１３は後述する電極板１１の
陰極面側に析出する不要付着物を除去することを目的と
して取付けたものであり、不要付着物が析出した電極板
１１は電極電圧等の上昇等からチェックされて、その都
度、その対象の電極板１１に超音波発振器１３が取付け
られて、陰極面側に超音波が付与される。The ultrasonic oscillator 13 is mounted for the purpose of removing unnecessary deposits deposited on the cathode side of the electrode plate 11 described later. Each time a check is made from a rise or the like, an ultrasonic oscillator 13 is attached to the target electrode plate 11 and ultrasonic waves are applied to the cathode surface side.
【００２４】しかし、これに限定されるものではなく、
予め、全電極板１１に超音波発振器１３を取付けてお
き、陰極面側に超音波を付与することもできる。However, the present invention is not limited to this.
An ultrasonic oscillator 13 can be attached to all the electrode plates 11 in advance, and ultrasonic waves can be applied to the cathode side.
【００２５】電極板１１の間にはガスケット１４がそれ
ぞれ配置されて電極間隔が一定に保持され、電解液１２
が流れるようにされている。Gaskets 14 are arranged between the electrode plates 11 to maintain a constant electrode spacing, and the electrolyte 12
Is made to flow.
【００２６】希釈塩水３ｂは（＋）の電荷を負荷する側
に設けた供給口１５ａから、塩水電解装置１０ａに連続
的に送入され、電極板１１の片端側に絶縁して設けた開
口部１６ａから、配列した電極板１１間に供給される。
開口部１６ａは対向する電極板１１に対して、対角位置
に設け、電解液１２は矢印の方向に電極間を均一に流
れ、その間電極反応が均一に行われる。The diluted salt water 3b is continuously fed into the salt water electrolysis apparatus 10a from a supply port 15a provided on the side to which the (+) charge is loaded, and is insulated from one end of the electrode plate 11 by an opening. From 16a, it is supplied between the arranged electrode plates 11.
The opening 16a is provided at a diagonal position with respect to the opposing electrode plate 11, and the electrolyte 12 flows uniformly between the electrodes in the direction of the arrow, during which the electrode reaction is performed uniformly.
【００２７】塩水電解装置１０ａで電極反応が終了した
電解液１２は排出液として（−）の電荷を負荷する側に
設けた排出口１７ａから排出される。しかし、まだ排出
液は次亜塩素酸ソーダの濃度が低いので、気液分離器１
８ａに送入され、そこで気液分離される。気液分離され
た排出液は熱交換器１９によって温度が調節された後、
供給口１５ｂから、塩水電解装置１０ｂに連続的に送入
され、電極板１１の片端側に絶縁して設けた開口部１６
ｂから、配列した電極板１１間に供給される。The electrolytic solution 12 having undergone the electrode reaction in the salt water electrolysis apparatus 10a is discharged as a discharge liquid from a discharge port 17a provided on the side to which the (-) charge is loaded. However, the effluent still has a low concentration of sodium hypochlorite, so the gas-liquid separator 1
8a, where it is gas-liquid separated. After the gas-liquid separated effluent is adjusted in temperature by the heat exchanger 19,
An opening 16 which is continuously fed from the supply port 15b to the salt water electrolysis apparatus 10b and is insulated at one end of the electrode plate 11
b, it is supplied between the arranged electrode plates 11.
【００２８】電解液１２は電極間を均一に流れ、その間
電極反応が均一に行われる。塩水電解装置１０ｂで電極
反応が終了した電解液１２は排出液１７ｂとして（−）
の電荷を負荷する側に設けた排出口１６ｂから排出され
る。しかし、まだ排出液は次亜塩素酸ソーダの濃度が低
いので、気液分離器１８ｂに送入され、そこで気液分離
される。The electrolytic solution 12 flows uniformly between the electrodes, during which the electrode reaction is performed uniformly. Electrolyte solution 12 in which the electrode reaction has been completed in salt water electrolysis device 10b is used as discharge solution 17b (-).
Is discharged from a discharge port 16b provided on the side on which the electric charge is loaded. However, the effluent still has a low concentration of sodium hypochlorite, so the effluent is sent to the gas-liquid separator 18b, where it is subjected to gas-liquid separation.
【００２９】気液分離された排出液１７ｂは熱交換器１
９によって温度が調節された後、供給口１４ｃから、塩
水電解装置１０ｃに連続的に送入され、電極板１１の片
端側に絶縁して設けた開口部１５ｂから、配列した電極
板１１間に供給される。電解液１２は電極間を均一に流
れ、その間電極反応が均一に行われる。塩水電解装置１
０ｃで電極反応が終了した電解液１２は排出液１７ｃと
して（−）の電荷を負荷する側に設けた排出口１６ｂか
ら排出される。排出液は気液分離器１８ｃに送入され、
そこで気液分離されて、最終の排出液として回収され
る。このようにして得られた排出液は次亜塩素酸ソーダ
１％を含有する。The effluent 17b from which gas-liquid separation has been performed is supplied to the heat exchanger 1
After the temperature is adjusted by 9, it is continuously fed into the salt water electrolysis apparatus 10 c from the supply port 14 c, and from the opening 15 b provided insulated at one end of the electrode plate 11, between the arranged electrode plates 11. Supplied. The electrolytic solution 12 flows uniformly between the electrodes, during which the electrode reaction is performed uniformly. Salt water electrolysis device 1
The electrolyte solution 12 which has completed the electrode reaction at 0c is discharged as a discharge liquid 17c from a discharge port 16b provided on the side to which the charge of (-) is loaded. The discharged liquid is sent to the gas-liquid separator 18c,
There, it is gas-liquid separated and collected as a final effluent. The effluent thus obtained contains 1% of sodium hypochlorite.
【００３０】上記した次亜塩素酸ソーダ１％の電解製造
では、希釈塩水３ｂに含まれるカルシウムイオン（Ｃａ
+2）、マグネシウム（Ｍｇ+3）等も陰極に析出しようと
するが、陰極では電気分解した水素イオン（Ｈ+1）が優
先的に析出して水素ガス（Ｈ 2）が発生する。陰極面近
傍では、水素ガス（Ｈ2）の発生に伴い、過剰の水酸化
イオン（ＯＨ-1）が存在するので、カルシウムイオン
（Ｃａ+2）、マクネシウム（Ｍｇ+3）等は水酸化カルシ
ウム、水酸化マグネシウム等になり、水酸化物の状態で
次第に陰極面に析出する。一端水酸化物が陰極面に析出
すると、そこが拠点になって、水酸化物が益々析出し
て、電極間隔が局部的に狭くなり、遂には正常な電気分
解が困難になる。Electrolytic production of 1% sodium hypochlorite as described above
Then, the calcium ions (Ca
+2), Magnesium (Mg+3Also try to deposit on the cathode
However, at the cathode, electrolyzed hydrogen ions (H+1) Is excellent
Hydrogen gas (H Two) Occurs. Near the cathode surface
Nearby, hydrogen gas (HTwo), Excessive hydroxylation
Ion (OH-1) Because there is a calcium ion
(Ca+2), Magnesium (Mg)+3) Etc. are hydroxide calcium
, Magnesium hydroxide, etc. in the state of hydroxide
Gradually deposits on the cathode surface. Hydroxide once deposited on cathode surface
Then, it becomes a base, and more and more hydroxide precipitates
As a result, the electrode spacing is locally reduced, and finally the normal electrical components
Solution becomes difficult.
【００３１】本発明では、電極電圧等から水酸化物析出
の初期段階を検出して、上記のような陰極面に水酸化物
が析出して、電極間隔が局部的に狭くなる前に、対象の
電極板１１に超音波を付与する。電極板１１の陰極面で
は超音波の微振動により水酸化物が陰極面から剥離され
る。この場合、微振動によって生じた微細な亀裂でもそ
の陰極面の個所に水素が活発に発生して剥離を促進し、
水酸化物が容易に剥離して電解液中に分散し、除去され
る。According to the present invention, the initial stage of hydroxide precipitation is detected from the electrode voltage and the like, and the hydroxide is deposited on the cathode surface as described above, and before the hydroxide electrode is locally narrowed, the target is removed. The ultrasonic wave is applied to the electrode plate 11. The hydroxide is separated from the cathode surface of the electrode plate 11 by the minute vibration of the ultrasonic wave. In this case, even a fine crack generated by micro vibration, hydrogen is actively generated at the place of the cathode surface and promotes peeling,
The hydroxide is easily peeled off, dispersed in the electrolytic solution, and removed.
【００３２】本発明では、電解時に常時電極板に超音波
を付与することができる。これによって陰極面での水酸
化カルシウム、水酸化マグネシウム等の水酸化物の析出
を防止するとともに、電極板の陰極面で発生する水素ガ
スはその気泡が均一微細な気泡になり、陰極面に沿って
上昇するので、発生した次亜塩素酸ソーダは陰極との接
触が減少して、還元されるチャンスを少なくできるの
で、次亜塩素酸ソーダの濃度を上昇させる潜在的効果が
期待できる。In the present invention, ultrasonic waves can be constantly applied to the electrode plate during electrolysis. This prevents the precipitation of hydroxides such as calcium hydroxide and magnesium hydroxide on the cathode surface, and the hydrogen gas generated on the cathode surface of the electrode plate becomes uniform and fine bubbles, and the hydrogen gas is generated along the cathode surface. Since the generated sodium hypochlorite reduces contact with the cathode and reduces the chance of being reduced, the potential effect of increasing the concentration of sodium hypochlorite can be expected.
【００３３】また、電極板に超音波を付与することによ
って、陰極面のみでなく、陽極面でも塩素ガスの発生を
均一に活発にすることができ、電流効率を向上させるこ
とができる。Further, by applying ultrasonic waves to the electrode plate, the generation of chlorine gas can be uniformly activated not only on the cathode surface but also on the anode surface, and the current efficiency can be improved.
【００３４】また、本発明では、電気分解中に電極板に
超音波を付与するだけでなく、電気分解を一時的に停止
して、電極板に超音波を付与することもできる。対象の
電極板の析出した水酸化物等を剥離し、除去する場合
に、超音波振動子等の取付け、取外し等の作業が容易で
あり、また、電極板は電気分解を停止した水溶液中に浸
漬した状態にあり、水酸化物等は陰極面との接着力がそ
れほど強固でないので、容易に剥離し、水溶液中に分散
させて除去することができる。In the present invention, not only the ultrasonic wave is applied to the electrode plate during the electrolysis, but also the ultrasonic wave can be applied to the electrode plate by temporarily stopping the electrolysis. When exfoliating and removing the hydroxide and the like deposited on the target electrode plate, it is easy to attach and remove the ultrasonic vibrator, etc., and the electrode plate is placed in an aqueous solution in which electrolysis is stopped. Since it is in a immersed state and the hydroxide and the like have not so strong adhesive force to the cathode surface, it can be easily peeled off and dispersed and removed in an aqueous solution.
【００３５】本発明の方法によれば、粗精製の原塩によ
り３％希釈塩水を作り、２５〜３５℃に調整して、図
１、図２に示した塩水電解装置により、チタンを基材と
した電極板で、電流密度１５Ａ／ｄｍ2で電気分解して
１％次亜塩素酸ソーダの製造を行った場合、全部の電極
板に超音波を付与し、連続的に２０００時間、電気分解
しても、全部の電極板の陰極面に水酸化カルシウムや水
酸化マグネシウム等の析出が見られなかった。一方、超
音波付与をしない外は同じ条件として１％次亜塩素酸ソ
ーダの製造を行った比較例では電極板の陰極面に局部的
に水酸化カルシウムや水酸化マグネシウム等の析出が見
られ、これ以上電気分解を継続することは困難であっ
た。According to the method of the present invention, a 3% diluted salt water is prepared from the crude salt of crude purification, the temperature is adjusted to 25 to 35 ° C., and the titanium is used as a base material by the salt water electrolysis apparatus shown in FIGS. When 1% sodium hypochlorite was produced by electrolysis at a current density of 15 A / dm 2 using an electrode plate prepared as described above, ultrasonic waves were applied to all the electrode plates and the electrolysis was continuously performed for 2,000 hours. However, no precipitation of calcium hydroxide, magnesium hydroxide, or the like was observed on the cathode surfaces of all the electrode plates. On the other hand, in a comparative example in which 1% sodium hypochlorite was produced under the same conditions except that the ultrasonic wave was not applied, precipitation of calcium hydroxide, magnesium hydroxide, or the like was locally observed on the cathode surface of the electrode plate. It was difficult to continue the electrolysis any more.
【００３６】以上の実施の形態では、次亜塩素酸ソーダ
について述べたが、これに限定されるものではなく、電
気分解による他の電気化学製品の製造の場合にも適用で
きる。In the above embodiment, sodium hypochlorite has been described. However, the present invention is not limited to this, and can be applied to the case of producing other electrochemical products by electrolysis.
【００３７】[0037]
【発明の効果】以上のように、本発明は、通常の電極板
を用いて、簡単な方法により、電極板に析出する水酸化
カルシウムや水酸化マグネシウム等の不要付着物を軽減
し、除去することができる。As described above, the present invention reduces and removes unnecessary deposits such as calcium hydroxide and magnesium hydroxide deposited on an electrode plate by a simple method using a normal electrode plate. be able to.
【図１】本発明の一実施の形態を示す平面図である。FIG. 1 is a plan view showing an embodiment of the present invention.
【図２】本発明の要部を示す平面図である。FIG. 2 is a plan view showing a main part of the present invention.
【図３】塩水電解の原理の説明図である。FIG. 3 is an explanatory diagram of the principle of salt water electrolysis.
１ 塩溶解槽 ２ 原塩 ３ 水 ３ａ 飽和塩水 ３ｂ 希釈塩水 ４ 塩水電解装置（原理説明用） ５ 陽極 ６ 陰極 ７ 次亜塩素酸ソーダ ８ 貯蔵槽 ９ ポンプ １０ 塩水電解設備 １０ａ、１０ｂ、１０ｃ 塩水電解装置 １１ 電極板 １１ａ ターミナル陽極 １１ｂ ターミナル陰極 １１ｃ 中間極 １２ 電解液 １３ 超音波発振器 １３ａ 波振動子 １３ｂ ホーン １４ ガスケット １５ａ、１５ｂ、１５ｃ 供給口 １６ａ、１６ｂ、１６ｃ 開口部 １７ａ、１７ｂ、１７ｃ 排出口 １８ａ、１８ｂ、１８ｃ 気液分離槽 １９ 熱交換器 ２０ 電源 DESCRIPTION OF SYMBOLS 1 Salt dissolving tank 2 Raw salt 3 Water 3a Saturated salt water 3b Dilute salt water 4 Salt water electrolyzer (for explanation of principle) 5 Anode 6 Cathode 7 Sodium hypochlorite 8 Storage tank 9 Pump 10 Salt water electrolysis equipment 10a, 10b, 10c Salt water electrolysis Apparatus 11 Electrode plate 11a Terminal anode 11b Terminal cathode 11c Intermediate electrode 12 Electrolyte 13 Ultrasonic oscillator 13a Wave oscillator 13b Horn 14 Gasket 15a, 15b, 15c Supply port 16a, 16b, 16c Opening 17a, 17b, 17c Discharge port 18a , 18b, 18c Gas-liquid separation tank 19 Heat exchanger 20 Power supply
フロントページの続き (72)発明者 藤原 優子 東京都千代田区丸の内一丁目１番２号 日 本鋼管株式会社内 Ｆターム(参考） 4K021 AB07 BC09 CA15 DA15 EA06Continuation of the front page (72) Inventor Yuko Fujiwara 1-2-1 Marunouchi, Chiyoda-ku, Tokyo F-term in Nihon Kokan Co., Ltd. 4K021 AB07 BC09 CA15 DA15 EA06
Claims (3)
を、該電極板に超音波振動を付与して、除去させること
を特徴とする電極板の不要付着物の除去方法。1. A method for removing unnecessary deposits on an electrode plate, the method comprising: applying ultrasonic vibration to the electrode plate to remove unnecessary deposits deposited on the electrode plate by electrolysis.
て次亜塩素酸ソーダを製造する際に、電極板に析出する
付着物を、電極板に超音波振動を付与して、除去させる
ことを特徴とする不要付着物の除去方法。2. A method of producing sodium hypochlorite by electrolyzing a saline solution in a non-diaphragm type electrolytic cell, applying an ultrasonic vibration to the electrode plate, A method for removing unnecessary deposits, which is characterized by being removed.
付着物を、電極板に超音波振動を付与して、除去させる
ことを特徴とする請求項１または請求項２記載の不要付
着物の除去方法。3. The method according to claim 1, wherein the electrolysis is stopped and the deposits deposited on the electrode plate are removed by applying ultrasonic vibration to the electrode plate. How to remove the kimono.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10273454A JP2000104192A (en) | 1998-09-28 | 1998-09-28 | Removing method of undesired deposit on electrode plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10273454A JP2000104192A (en) | 1998-09-28 | 1998-09-28 | Removing method of undesired deposit on electrode plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000104192A true JP2000104192A (en) | 2000-04-11 |
Family
ID=17528147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10273454A Pending JP2000104192A (en) | 1998-09-28 | 1998-09-28 | Removing method of undesired deposit on electrode plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000104192A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002090621A1 (en) * | 2001-05-02 | 2002-11-14 | Japan Techno Co., Ltd. | Hydrogen-oxygen gas generator and method of generating hydrogen-oxygen gas using the generator |
| JP2014506630A (en) * | 2011-03-14 | 2014-03-17 | キム，ギョンス | Open cell sodium hypochlorite production equipment |
| CN105274553A (en) * | 2015-11-24 | 2016-01-27 | 成都百鸥飞达生物科技有限公司 | Novel semi-diaphragm sodium hypochlorite generator |
| JP6097987B1 (en) * | 2016-10-13 | 2017-03-22 | 正裕 井尻 | An oxyhydrogen generator and a hybrid vehicle or a fuel cell vehicle including the oxyhydrogen generator. |
| CN112522729A (en) * | 2020-12-01 | 2021-03-19 | 宁波八益集团有限公司 | Hypochlorous acid production system and high-stability hypochlorous acid production method thereof |
-
1998
- 1998-09-28 JP JP10273454A patent/JP2000104192A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002090621A1 (en) * | 2001-05-02 | 2002-11-14 | Japan Techno Co., Ltd. | Hydrogen-oxygen gas generator and method of generating hydrogen-oxygen gas using the generator |
| US7459071B2 (en) | 2001-05-02 | 2008-12-02 | Japan Techno Co., Ltd. | Hydrogen-oxygen gas generator and method of generating hydrogen-oxygen gas using the generator |
| JP2014506630A (en) * | 2011-03-14 | 2014-03-17 | キム，ギョンス | Open cell sodium hypochlorite production equipment |
| CN105274553A (en) * | 2015-11-24 | 2016-01-27 | 成都百鸥飞达生物科技有限公司 | Novel semi-diaphragm sodium hypochlorite generator |
| CN105274553B (en) * | 2015-11-24 | 2018-07-31 | 成都百鸥飞达生物科技有限公司 | Half diaphragm hypochlorite generator |
| JP6097987B1 (en) * | 2016-10-13 | 2017-03-22 | 正裕 井尻 | An oxyhydrogen generator and a hybrid vehicle or a fuel cell vehicle including the oxyhydrogen generator. |
| WO2018070061A1 (en) * | 2016-10-13 | 2018-04-19 | 正裕 井尻 | Acid hydrogen generating device, and hybrid vehicle or fuel-cell vehicle provided with acid hydrogen generating device |
| CN112522729A (en) * | 2020-12-01 | 2021-03-19 | 宁波八益集团有限公司 | Hypochlorous acid production system and high-stability hypochlorous acid production method thereof |
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