JP2000273670A - Method for operating oxygen cathode process salt electrolyzing cell - Google Patents
Method for operating oxygen cathode process salt electrolyzing cellInfo
- Publication number
- JP2000273670A JP2000273670A JP11080147A JP8014799A JP2000273670A JP 2000273670 A JP2000273670 A JP 2000273670A JP 11080147 A JP11080147 A JP 11080147A JP 8014799 A JP8014799 A JP 8014799A JP 2000273670 A JP2000273670 A JP 2000273670A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- cathode
- cell
- frame
- oxygen
- 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
Landscapes
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ガス拡散電極を用
いた酸素陰極法食塩電解槽を安全に運転する方法に関す
る。[0001] The present invention relates to a method for safely operating an oxygen-cathode salt electrolyzer using a gas diffusion electrode.
【０００２】[0002]
【従来の技術】ガス拡散電極を用いた酸素陰極法食塩電
解槽は、一般に電流密度３０Ａ／ｄｍ 2 程度の定電流で
運転される。その運転において、ガス拡散電極に酸素ガ
スが十分に供給されないとき、あるいはガス拡散電極の
性能が劣化してきたときには、電圧が３Ｖ程度まで上昇
し、水素が発生する。また、ガス拡散電極の一部に酸素
還元反応の働きが無くなると電圧が２．５Ｖでも水素が
発生する。2. Description of the Related Art Oxygen cathode method using a gas diffusion electrode
The thawing tank generally has a current density of 30 A / dm. TwoWith a constant current of about
Be driven. During the operation, oxygen gas is applied to the gas diffusion electrode.
When the gas is not supplied sufficiently or when the gas diffusion electrode
When performance deteriorates, voltage rises to about 3V
Then, hydrogen is generated. In addition, oxygen is partially added to the gas diffusion electrode.
When the action of the reduction reaction is lost, hydrogen is generated even at a voltage of 2.5 V.
appear.
【０００３】[0003]
【発明が解決しようとする課題】発生した水素は、ガス
拡散電極のガス供給層を通してガス室側に拡散し、供給
酸素と混合されやすい。混合ガスの水素濃度が５％以上
になると爆発の危険がある。爆発させないためには何ら
かの対策が必要である。例えばガス出口に水素検出器を
設置することが行われているが、大型電解槽になるとガ
ス量が大きくなり、検出速度と感度が問題になる。その
結果、水素発生の可能性がない電解方法の実現が望まれ
ている。本発明は、水素ガス発生の可能性が実質的にほ
とんどない安全な電解方法を提供することを目的とす
る。The generated hydrogen diffuses toward the gas chamber through the gas supply layer of the gas diffusion electrode and is easily mixed with the supplied oxygen. If the hydrogen concentration of the mixed gas becomes 5% or more, there is a risk of explosion. Some measures are needed to prevent explosion. For example, a hydrogen detector is installed at a gas outlet. However, in a large electrolytic cell, the gas amount becomes large, and the detection speed and sensitivity become problems. As a result, it is desired to realize an electrolysis method having no possibility of generating hydrogen. An object of the present invention is to provide a safe electrolysis method having substantially no possibility of hydrogen gas generation.
【０００４】[0004]
【課題を解決するための手段】本発明は、以下の手段に
より上記の課題を解決した。 （１）酸素陰極を装着したイオン交換膜法食塩電解槽の
運転において、電解槽の各陰極フレームと各陽極フレー
ムに電気接点を設け、それぞれの単槽電圧を測定し、そ
の電圧が２．３８Ｖ以下で運転する食塩電解槽の運転方
法。 （２）各陰極フレーム及び陽極フレームの電圧をマルチ
プレクサを介し、コンピュータに入力し、コンピュータ
で単槽電圧が２．３８Ｖ以下になるように電源を制御す
る制御システムを用いる食塩電解槽の運転方法。The present invention has solved the above-mentioned problems by the following means. (1) In operation of an ion exchange membrane method salt electrolytic cell equipped with an oxygen cathode, electric contacts were provided on each cathode frame and each anode frame of the electrolytic cell, and the voltage of each single cell was measured, and the voltage was 2.38V. The method of operating the salt electrolyzer operated below. (2) A method of operating a salt cell using a control system in which the voltage of each cathode frame and anode frame is input to a computer via a multiplexer, and the computer controls the power supply so that the single cell voltage becomes 2.38 V or less.
【０００５】本発明は、以下の考えに基づく。水素発生
陰極を用いた食塩電解槽の理論電解電圧は、膜電位も含
めて通常２．３６Ｖ前後である。すなわち、この電圧以
上でないと陰極から水素は発生しない。一方、酸素陰極
を用いた電解槽では、単槽電圧は、３０Ａ／ｄｍ2 の電
流密度で、２．０Ｖ以下で運転出来る。高電流密度であ
る５０Ａ／ｄｍ2 程度になっても単槽電圧２．２５Ｖ以
下で運転できる。そこで、電解槽の陰極フレーム、陽極
フレームに電圧測定端子を設け、絶縁型データロガーで
それぞれの瑞子電圧を測定し、コンピュータによりそれ
ぞれの単槽電圧を計算し、どれかの単槽電圧が２．３８
Ｖ以上になったら電源を制御し、電流を低下させるかシ
ャットダウンする。[0005] The present invention is based on the following idea. The theoretical electrolysis voltage of a salt electrolyzer using a hydrogen generating cathode is usually around 2.36 V including the membrane potential. That is, unless the voltage is higher than this voltage, no hydrogen is generated from the cathode. On the other hand, an electrolytic cell using an oxygen cathode can be operated at a single cell voltage of 2.0 V or less at a current density of 30 A / dm 2 . It can be operated at a single cell voltage of 2.25 V or less even at a high current density of about 50 A / dm 2 . Therefore, voltage measuring terminals are provided on the cathode frame and the anode frame of the electrolytic cell, each voltage is measured by an insulation type data logger, and each single cell voltage is calculated by a computer. 38
When the voltage exceeds V, the power supply is controlled to reduce the current or shut down.
【０００６】[0006]
【発明の実施の形態】以下、実施の形態を説明するが、
本発明はこれに限定されない。酸素陰極を装着したイオ
ン交換膜法バイポーラ食塩電解槽の各陰極フレームと各
陽極フレームに電圧測定端子を付け、それぞれの端子に
はシールド付きリード線を付け、水銀リードリレーで構
成されたマルチプレクサ、絶縁型電圧計に接続する。電
解槽電源を制御する入出力制御コンピュータを設け、絶
縁型電圧計を入出力制御コンピュータに連結させる。絶
縁型電圧計につなげた入出力制御コンピュータにデータ
を取り込み、各単槽電圧を算出する。何れかの単槽電圧
が２．３８Ｖを越えたら電解槽電源を制御し、電流密度
を落とし、２．３Ｖ以下の電圧になるようにするか、電
解を停止する様にする。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments will be described below.
The present invention is not limited to this. A voltage measurement terminal is attached to each cathode frame and each anode frame of the ion exchange membrane method bipolar salt cell equipped with an oxygen cathode, a shielded lead wire is attached to each terminal, a multiplexer composed of mercury reed relays, insulation Connect to type voltmeter. An input / output control computer for controlling the electrolytic cell power supply is provided, and the insulation type voltmeter is connected to the input / output control computer. The data is taken into the input / output control computer connected to the insulated voltmeter, and each cell voltage is calculated. If any single cell voltage exceeds 2.38V, the power of the electrolytic cell is controlled to reduce the current density so that the voltage becomes 2.3V or less, or the electrolysis is stopped.
【０００７】[0007]
【実施例】以下、実施例により本発明を具体的に説明す
るが、本発明はこれに限定されるものではない。EXAMPLES The present invention will be described below in detail with reference to examples, but the present invention is not limited to these examples.
【０００８】実施例１ １ｄｍ2 の酸素陰極を装着したイオン交換膜法電解槽の
陽極フレームと陰極フレームに電圧測定端子を付け、シ
ールドされたリード線でマルチプレクサに配線し、差動
入力でコンピュータに電圧値を入力した。また、コンピ
ュータと直流電源をＲＳ−２３２Ｃの電源制御装置を介
して接続し、コンピュータで電解槽電源の出力を制御出
来るようにした。前記電解槽に、濃度３２％ＮａＯＨ水
溶液、反応温度８０℃という条件下、酸素陰極に酸素を
流して３０Ａ／ｄｍ2 の電流密度で電解すると、電解電
圧は２．０２Ｖを示した。酸素の代わりに窒素を流すと
数秒後に２．３８Ｖを越え、コンピュータ制御で電源が
直ちに遮断された。このときガス中の水素を分析したが
検出出来なかった。水素を検出するには設定電位を２．
５Ｖ以上にする必要があることが分かった。Example 1 A voltage measuring terminal is attached to an anode frame and a cathode frame of an ion exchange membrane electrolytic cell equipped with a 1 dm 2 oxygen cathode, wired to a multiplexer with shielded lead wires, and connected to a computer by differential input. A voltage value was entered. Further, a computer and a DC power supply were connected via a power control device of RS-232C, so that the output of the electrolytic cell power supply could be controlled by the computer. When electrolysis was carried out at a current density of 30 A / dm 2 by flowing oxygen through the oxygen cathode under the conditions of a 32% NaOH aqueous solution and a reaction temperature of 80 ° C., the electrolysis voltage showed 2.02 V. When nitrogen was supplied instead of oxygen, the voltage exceeded 2.38 V after a few seconds, and the power was immediately shut off under computer control. At this time, the hydrogen in the gas was analyzed but could not be detected. To detect hydrogen, set the potential to 2.
It was found that the voltage had to be 5 V or more.
【０００９】[0009]
【発明の効果】本発明によれば、水素ガス発生の可能性
が実質的にほとんどない安全な電解方法を行うことがで
きる。単槽電圧を逐次測定し、何らかの原因で電圧上昇
が起こっても電解槽は２．３８Ｖを越える電圧にならな
いように制御することができる。２．３８Ｖを越えない
と水素発生反応は起こらないので、水素ガスが酸素ガス
と爆鳴気を作ることがないので、食塩電解槽は安全に運
転することができる。According to the present invention, a safe electrolysis method with substantially no possibility of generating hydrogen gas can be performed. The single cell voltage is measured successively, and even if the voltage rises for some reason, the electrolytic cell can be controlled so that the voltage does not exceed 2.38V. If the voltage does not exceed 2.38 V, the hydrogen generation reaction does not take place, so that the hydrogen gas does not generate explosive gas with the oxygen gas, so that the salt electrolytic cell can be operated safely.
───────────────────────────────────────────────────── フロントページの続き (71)出願人 000000941 鐘淵化学工業株式会社 大阪府大阪市北区中之島３丁目２番４号 (72)発明者 古屋 長一 山梨県甲府市中村町２−14 Ｆターム(参考） 4K021 AB01 BA03 CA06 CA13 DB16 DB31 ──────────────────────────────────────────────────続 き Continued on the front page (71) Applicant 000000941 Kanebuchi Chemical Industry Co., Ltd. 3-4-2 Nakanoshima, Kita-ku, Osaka-shi, Osaka (72) Inventor Choichi Furiya 2-14F, Nakamuracho, Kofu-shi, Yamanashi Prefecture Term (reference) 4K021 AB01 BA03 CA06 CA13 DB16 DB31
Claims (2)
電解槽の運転において、電解槽の各陰極フレームと各陽
極フレームに電気接点を設け、それぞれの単槽電圧を測
定し、その電圧が２．３８Ｖ以下で運転する食塩電解槽
の運転方法。In the operation of an ion exchange membrane method salt electrolytic cell equipped with an oxygen cathode, electric contacts are provided on each cathode frame and each anode frame of the electrolytic cell, and the voltage of each single cell is measured. A method for operating a salt cell operated at 38 V or less.
をマルチプレクサを介し、コンピュータに入力し、コン
ピュータで単槽電圧が２．３８Ｖ以下になるように電源
を制御する制御システムを用いる食塩電解槽の運転方
法。2. The operation of a salt cell using a control system in which the voltage of each cathode frame and anode frame is input to a computer via a multiplexer, and the computer controls the power supply so that the single cell voltage becomes 2.38 V or less. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11080147A JP3041790B1 (en) | 1999-03-24 | 1999-03-24 | Operating method of oxygen cathode method salt electrolyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11080147A JP3041790B1 (en) | 1999-03-24 | 1999-03-24 | Operating method of oxygen cathode method salt electrolyzer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP3041790B1 JP3041790B1 (en) | 2000-05-15 |
| JP2000273670A true JP2000273670A (en) | 2000-10-03 |
Family
ID=13710180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11080147A Expired - Lifetime JP3041790B1 (en) | 1999-03-24 | 1999-03-24 | Operating method of oxygen cathode method salt electrolyzer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3041790B1 (en) |
-
1999
- 1999-03-24 JP JP11080147A patent/JP3041790B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP3041790B1 (en) | 2000-05-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Stucki et al. | In situ production of ozone in water using a membrel electrolyzer | |
| Hoare | Oxygen | |
| EP2857555B1 (en) | High-concentration hydrogen gas supply device for living bodies | |
| US3300345A (en) | Electrolytic cell for producing electricity and method of operating the cell | |
| Grigor'ev et al. | Electrolysis of water in a system with a solid polymer electrolyte at elevated pressure | |
| JPS6380480A (en) | Fuel battery and generation therewith | |
| KR20160100299A (en) | Device and method for the flexible use of electricity | |
| GB2582049A (en) | Method for operating an electrolysis system and electrolysis system | |
| EP4033009A1 (en) | Hydrogen generation system control method, and hydrogen generation system | |
| JP3062254B2 (en) | Ionic substance detector | |
| Taylor et al. | Crevice Corrosion in High‐Temperature Aqueous Systems Potential/pH Measurements in Alloy 600 Crevices at 288° C | |
| GB2254696A (en) | Gas sensor and calibration device | |
| JPS6120633B2 (en) | ||
| JP3041790B1 (en) | Operating method of oxygen cathode method salt electrolyzer | |
| JP4601647B2 (en) | Hydrogen generator and fuel cell system using the same | |
| Piskarev et al. | Formation of ozone and hydrogen peroxide during an electrical discharge in the solution-gas system | |
| US20230014927A1 (en) | Organic hydride generation system, control device for organic hydride generation system, and control method for organic hydride generation system | |
| JP3437128B2 (en) | Alkaline chloride electrolysis apparatus and its operation method | |
| Trišović et al. | On the kinetics of the hydrogen evolution reaction on zinc in sulfate solutions | |
| JP6865749B2 (en) | Electrochemical cells and methods | |
| JPS6240438B2 (en) | ||
| JPH09279377A (en) | Producing device of hydrogen peroxide and its production | |
| EP4227438A1 (en) | Method for operating a plurality of electrolyser-stacks | |
| Zhang et al. | Adjustment of valence state of Pu and Np in nitric solution containing N, N-dimethylhydroxylamine and monomethylhydrazine by electrolysis | |
| JPH11267652A (en) | Method of generating ozone water and hydrogen water, and device therefor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080310 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090310 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090310 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100310 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100310 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110310 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110310 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120310 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120310 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130310 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130310 Year of fee payment: 13 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140310 Year of fee payment: 14 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |