EP0099795B1 - Dispositif de contrôle et de visualisation de la répartition du courant dans un électrolyseur - Google Patents

Dispositif de contrôle et de visualisation de la répartition du courant dans un électrolyseur Download PDF

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Publication number
EP0099795B1
EP0099795B1 EP83401356A EP83401356A EP0099795B1 EP 0099795 B1 EP0099795 B1 EP 0099795B1 EP 83401356 A EP83401356 A EP 83401356A EP 83401356 A EP83401356 A EP 83401356A EP 0099795 B1 EP0099795 B1 EP 0099795B1
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EP
European Patent Office
Prior art keywords
voltage
current
measuring
anode
distribution
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP83401356A
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German (de)
English (en)
French (fr)
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EP0099795A1 (fr
Inventor
Jean De Costecaude
Zénon Majgier
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Individual
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Individual
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Publication date
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Priority to AT83401356T priority Critical patent/ATE24551T1/de
Publication of EP0099795A1 publication Critical patent/EP0099795A1/fr
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B15/00—Operating or servicing cells
    • C25B15/02—Process control or regulation

Definitions

  • the present invention relates to a device for controlling and displaying the distribution of current in an electrolysis cell. It relates more particularly to a device usable in installations for the electrolysis of alkali metal halides in cells with mercury or amalgam cathodes.
  • This centralization system naturally presents the advantages specific to centralization, that is to say in particular the possibility of scrolling, in a single place and on the same screen, the current distribution profile of a set of cells of electrolysis.
  • this system does not at all times allow the control and visualization of the current distribution profile nor simultaneously the control and visualization of a group of cells while knowledge of the operation of electrolysis cells clearly shows the existence of interactions between cells.
  • EP-A-0 068 076 belonging to the state of the art according to article 54 (3), there is described a device for monitoring and controlling cells with mercury cathodes, device comprising the measurement of the current, its reading, comparison of the measured values with a reference value and the emission of a control signal from the servomotors intended to take up the anodes and stop any overcurrent.
  • the invention firstly proposes to provide a system for controlling and displaying the distribution of current in the cells of an electrolysis installation, this system being individualized at the level of each cell.
  • Another object of the invention is to provide a system located at the cell level and allowing the simultaneous monitoring of several cells.
  • Another object of the invention is to provide a system allowing permanent and continuous control of all cells.
  • electrolysis cell will be used to denote a unit comprising the same mercury or amalgam cathode, that is to say the same flow of mercury or amalgam, this unit being able to be constituted by the juxtaposition of several anode groups in general from 2 to 5, the number of anodes in each group being able to range from 2 to 10.
  • a device for controlling and displaying the distribution of the current in the electrolysis cells, this system being characterized in that it comprises, for each electrolysis cell, a set of means (A ) for measuring and controlling the distribution of the current at each anode and of the voltage between each group of anodes and the corresponding cathode part and of a set of means (B) allowing instantaneous and continuous visualization of this distribution current, voltage and exceeding current and voltage thresholds.
  • A for measuring and controlling the distribution of the current at each anode and of the voltage between each group of anodes and the corresponding cathode part and of a set of means (B) allowing instantaneous and continuous visualization of this distribution current, voltage and exceeding current and voltage thresholds.
  • corresponding cathode part means that the voltage measurement is carried out between a point arranged on the group of anodes and a point on the cathode situated substantially opposite or directly above said point.
  • the signals thus amplified advantageously pass through a low-pass filter (F 1 , F 2 ... F n ) intended for the elimination of the parasites.
  • the voltage measurement means comprise, for a group of anodes, a voltage measurement point (U 1 to Up), an amplifier (AA, to AAp ), the set of resistors (RR1 1 , RR1 2 , RR1 3 , RR1 4 to RRp 1 , RRp 2 , RRp 3 , RRp 4 ) and, in particular in the application to alkali halide electrolysis cells comprising a mercury cathode, a low-pass filter (FF1 to FFp).
  • FF1 to FFp low-pass filter
  • the summation device S calculates the sum ⁇
  • the summing device S can for example be an operational amplifier mounted as a summing device.
  • the same signal ⁇ I is sent to a device U c for calculating a voltage value U which will be set and which will serve as a reference or basis for controlling the voltage in the cell and which may possibly be displayed.
  • k a value which can be between 0.3.10 -3 and 0.8.10 -3 ⁇ (I being expressed in kA), the value of E itself being able to vary from 3.05 to 3.20 V.
  • the device for calculating this set value can for example be an operational amplifier mounted as a summator, which will be connected to the summing device S, via the resistor k and will receive the reference voltage E (average of the voltages of the p groups of anodes) and will deliver a signal which can control a display system and a signal which can either be used as such as a reference value for comparison with the voltage values .
  • the signal delivered by the device M is sent to each of the comparators C 1 , C 2 ... C n at the same time as the signals coming from the amplifiers A 1 , A 2 ... A n .
  • the value of I 1 , 1 2 ... or I n is greater than the average intensity mentioned above, there is emission of a signal making it possible to locate the deficient anode, this signal being able to be accompanied by a light and / or audible alarm signal AL.
  • the emitter of the signal locating the deficient anode may for example be a light-emitting diode, an indicator light or any equivalent device.
  • the signal sent by the amplifiers AA 1 to AA P is compared in CC, to CC P with the value U or, preferably with the values U M and U m , this comparison resulting in the emission of a signal, either if U 1 ... Up is different from U, or if U 1 ... Up is greater than U M and / or less than U m .
  • Comparators C 1 , C 2 ... C n and CC 1 ... CCp may for example be comparators or operational amplifiers mounted as comparators.
  • voltage AA, ... AAp are sent to the display devices.
  • These devices are essentially of two types: the display of the intensities is ensured by light scales made up of a plurality of light-emitting diodes, these diodes being supplied by one or more analog / digital converters A / D connected to the amplifiers; the voltages can be displayed by analog or, preferably, digital voltmeters.
  • Each of the light scales mentioned above has a resolution advantageously of 20 points, each point corresponding for example, in the electrolysis application of sodium chloride in mercury cells, at 1 mV and also corresponding to a light-emitting diode.
  • Light scales are thus produced comprising 20 light-emitting diodes, but it goes without saying that this number is purely indicative and that it is possible, without departing from the scope of the invention, to have scales of different resolution, for example between 10 and 40 points. , by keeping the same intensity range covered but by modifying the meaning of each point (from 0.5 to 2 mV per point for example) or by modifying the intensity range.
  • the light scale can be produced by combining two or more modules, each consisting for example of 5 to 10 light-emitting diodes, each of the modules being able to be controlled by an analog / digital converter.
  • the converters are generally connected in series.
  • the analog / digital converters can for example be constituted by the integrated circuits marketed under the references LM 3914 by National Semi-Conductor or TL 490 by Texas Instruments.
  • the display panel may include, in addition to the aforementioned light scales and voltmeters, a display of the brine outlet temperature, the temperature measurement being able to be carried out by means of a thermocouple or of a variable resistance in temperature function (T ° C).
  • the device according to the invention thus continuously provides a set of information on the operation of the cell.
  • Visualization by light scale, by comparison with needle or digital display devices has the considerable advantage of instantly providing a vision of all the anodes and groups of anodes connected to the same device.
  • the small size of the system allows it to be installed in the immediate vicinity of the electrolysis tanks and therefore makes it possible to immediately compare the profile of a tank with that of neighboring tanks.
  • the measurement, control and display system according to the invention can be connected to an automatic regulation system comprising motorized anode supports and a device controlling in particular the ascent of the anodes in the event of a short circuit or danger of short circuit, assuming use in mercury cathode cells.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
EP83401356A 1982-07-07 1983-07-01 Dispositif de contrôle et de visualisation de la répartition du courant dans un électrolyseur Expired EP0099795B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83401356T ATE24551T1 (de) 1982-07-07 1983-07-01 Vorrichtung zum ueberwachen und anzeigen der stromverteilung in einem elektrolyseur.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8211907 1982-07-07
FR8211907A FR2529913A1 (fr) 1982-07-07 1982-07-07 Dispositif de controle et de visualisation de la repartition du courant dans un electrolyseur

Publications (2)

Publication Number Publication Date
EP0099795A1 EP0099795A1 (fr) 1984-02-01
EP0099795B1 true EP0099795B1 (fr) 1986-12-30

Family

ID=9275764

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83401356A Expired EP0099795B1 (fr) 1982-07-07 1983-07-01 Dispositif de contrôle et de visualisation de la répartition du courant dans un électrolyseur

Country Status (4)

Country Link
EP (1) EP0099795B1 (enrdf_load_stackoverflow)
AT (1) ATE24551T1 (enrdf_load_stackoverflow)
DE (1) DE3368693D1 (enrdf_load_stackoverflow)
FR (1) FR2529913A1 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8507094D0 (en) * 1985-03-19 1985-04-24 Welding Inst Welding monitor
WO2007087728A1 (en) 2006-02-03 2007-08-09 Recherche 2000 Inc. Adaptive method and system of monitoring signals for detecting anomalies
CN112226787B (zh) * 2020-10-21 2022-04-08 阳光电源股份有限公司 一种制氢系统开关机的控制方法、装置、系统及存储介质

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0068076A2 (de) * 1981-06-19 1983-01-05 Heraeus Elektroden GmbH Überwachungs- und Steuerungseinrichtung für Chloralkalielektrolysezellen mit Quecksilberkathode

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3844913A (en) * 1973-05-10 1974-10-29 Olin Corp Method for regulating anode-cathode spacing in an electrolytic cell to prevent current overloads and underloads
DE2352372A1 (de) * 1973-10-18 1975-04-24 Siemens Ag Einrichtung zur ueberwachung und anzeige der verteilung der anodenstroeme in einer chlor-elektrolyseanlage
DE2652774C2 (de) * 1976-11-19 1987-03-05 Siemens AG, 1000 Berlin und 8000 München Einrichtung zur Überwachung einer Elektrolyseanlage

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0068076A2 (de) * 1981-06-19 1983-01-05 Heraeus Elektroden GmbH Überwachungs- und Steuerungseinrichtung für Chloralkalielektrolysezellen mit Quecksilberkathode

Also Published As

Publication number Publication date
EP0099795A1 (fr) 1984-02-01
DE3368693D1 (en) 1987-02-05
ATE24551T1 (de) 1987-01-15
FR2529913B1 (enrdf_load_stackoverflow) 1984-12-21
FR2529913A1 (fr) 1984-01-13

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