EP0114223B1 - Dispositif pour l'affichage des informations et la régulation automatique des cellules d'électrolyse chlore-alcalines - Google Patents

Dispositif pour l'affichage des informations et la régulation automatique des cellules d'électrolyse chlore-alcalines Download PDF

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Publication number
EP0114223B1
EP0114223B1 EP83111271A EP83111271A EP0114223B1 EP 0114223 B1 EP0114223 B1 EP 0114223B1 EP 83111271 A EP83111271 A EP 83111271A EP 83111271 A EP83111271 A EP 83111271A EP 0114223 B1 EP0114223 B1 EP 0114223B1
Authority
EP
European Patent Office
Prior art keywords
display unit
chlor
detection
current
recording
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
EP83111271A
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German (de)
English (en)
Other versions
EP0114223A1 (fr
Inventor
Kurt Lehmann
Hans Wilhelm Valentin
Karl-Heinz Gnann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hoechst AG
Original Assignee
Hoechst AG
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Filing date
Publication date
Application filed by Hoechst AG filed Critical Hoechst AG
Publication of EP0114223A1 publication Critical patent/EP0114223A1/fr
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Publication of EP0114223B1 publication Critical patent/EP0114223B1/fr
Expired legal-status Critical Current

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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 invention relates to a device for regulating and displaying information of chlor-alkali electrolysis cells which are operated according to the amalgam process, in which metal anodes are combined to form metal anode groups, each of which is fed by a current rail from an electrolysis current, from which a current measurement signal is derived, which is used for detection - And display unit is supplied, from which, taking into account the busbar temperature likewise determined on the busbar, a corrected electrolysis current signal is calculated by means of a one-chip computer, which is fed to a higher-level common processing unit which carries out the optimal regulation of the height distance of the metal anode group.
  • DE-AS 1 767840 describes an arrangement for automatically setting the optimal electrode spacing and for automatically eliminating short circuits between the cells in chlor-alkaline electrolysis cells, with which the operating state of the individual electrolysis cells is measured cyclically and these measured values in a central control unit for controlling the Electrode distances can be used. Operation depends on the permanent availability of the central control unit. For safety reasons, an additional device is installed, with which the electrode distances are automatically increased if the central control unit fails.
  • US-A-4 067 793 describes a control and display system for chlor-alkali electrolysis cells for amaigam processes, in which each metal anode or a plurality of combined metal anodes are equipped with a current signal transmitter and these current signals are converted into a digital signal in a subunit. This digital signal is then input into a central control device to which all chlor-alkali electrolysis cells are connected. The chlor-alkali electrolysis cells are controlled by this central control device by adjusting the height of the metal anodes. If the central control device fails, control of the chlor-alkali electrolysis cells is no longer possible.
  • the device for regulating and displaying information from chloralkali electrolysis cells which are operated according to the amalgam process, in which metal anodes are combined to form metal anode groups 21, each of which is fed via a busbar 17 by an electrolysis current from which a current measurement signal is derived, which a detection and display unit 1 is supplied, from which, taking into account the busbar temperature, likewise determined on the busbar, a corrected electrolysis current signal is calculated by means of a one-chip computer 2, which is fed to a higher-level common processing unit 16, which optimally regulates the height distance of the Carries out metal anode group 21, solved in that each detection and display unit 1 is assigned to a single metal anode group 21 and is arranged directly at the electrolytic cell, and in that each detection and display unit 1 has an LED bar that can always be read display device 3, based on the measured values in the event of a fault in the common processing unit 16, the height distance. can be optimized on site.
  • the detection and display unit 1 is constructed from a circuit board 22 with a single-chip computer 2, an LED bar display 3, electrical measuring lines 4 for measuring the electrolysis current and 6 for measuring the temperature, a DC converter 9 with a transformer 7 and a diode 8 and an optocoupler 5 with transmission lines 12, 13 to the processing unit 16.
  • the automatic control of the metal electrode group 21 expediently takes place via the common processing unit 16.
  • the optimization of the current yield with the metal electrode group 21 takes place on site depending on the measured values of the detection and display units 1.
  • FIG. 1 shows the circuit diagram of the network between the chlor-alkali electrolysis cells and the common processing unit 16 via the detection and display units 1 assigned to each metal electrode group.
  • FIG. 2 shows the structure of the detection and display units 1.
  • a voltage drop .DELTA.U is tapped on the busbar between a predetermined distance and fed to the detection and display unit 1 mounted on the printed circuit board 22 via the measuring line 4.
  • the current strength of the electrolysis current is calculated in the one-chip computer 2 and shown both in the LED bar display 3 and also transmitted to the processing unit 16 by means of an optocoupler 5 and the transmission line 12.
  • the processing unit 16 calls up the measured values of the detection and display units 1 via the transmission line 13.
  • the voltage drop of the electrolytic cell and the temperature of the electrolyte in the electrolytic cell are made available to the processing unit 16 via the measuring lines 18, 19.
  • the distance of the metal electrode group 21 from the mercury cathode is automatically controlled via the command line 20 in accordance with an average value from the measured values of the detection and display units 1.
  • the measured values of all metal electrode groups 21 of each electrolytic cell are added to an average.
  • a difference value is formed from this mean value and a default value.
  • the metal electrode groups 21 are then optimized again as a function of the measured values of the detection and display unit 1 by targeted lifting or lowering on site.
  • the potential difference (AU) tapped off the busbar 17 is input via the electrical measuring line 4 into the one-chip computer 2 (microprocessor with PROM).
  • the temperature of the busbar 17 is introduced into the one-chip computer 2 via the electrical measuring line 6 by means of a semiconductor temperature sensor (AD 590 analog devices).
  • the one-chip computer 2 assigns a measured value for the electrolysis current to the tapped potential difference (AU) and corrects this value according to the temperature of the busbar 17.
  • the corrected measured value for the electrolysis current is shown optically in the LED bar display 3 and by means of an optocoupler 5 - consisting of LEDs 10, 15 and phototransistors 11, 14 - supplied to the processing unit 16 via the transmission line 12.
  • the individual function carriers of the detection and display unit 1 are arranged on a printed circuit board 22.
  • the detection and display units 1 are connected to a direct current converter 9, which is fed via the diode 8 and the transformer 7.

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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)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Claims (1)

  1. Dispositif de réglage et de représentation d'informations de cellules d'électrolyse de chlorures alcalins fonctionnant par le procédé à l'amalgame, dans lequel des anodes métalliques sont disposées en groupes (21) alimentés chacun, par l'intermédiaire d'un rail de contact (17), de courant d'électrolyse dont on dérive et on envoie à une unité (1) d'enregistrement et d'indication un signal de mesure de courant permettant à une calculatrice à puce (2) de déterminer, en tenant compte de la température également mesurée sur le rail de contact, un signal de courant d'électrolyse corrigé que l'on envoie à une unité (16) de traitement commune prioritaire effectuant le réglage optimal de la distance en hauteur du groupe (21) d'anodes métalliques, caractérisé en ce que chaque unité (1) d'enregistrement et d'indication est associée, au voisinage immédiat de la cellule d'électrolyse, à un seul groupe (21) d'anodes métalliques et en ce que chaque unité (1) d'enregistrement et d'indication présente un élément indicateur (3) à segments DEL toujours lisible fournissant des valeurs expérimentales qui, en cas de panne de l'unité (16) de traitement commune, permettent d'optimiser sur place la distance en hauteur.
EP83111271A 1982-11-27 1983-11-11 Dispositif pour l'affichage des informations et la régulation automatique des cellules d'électrolyse chlore-alcalines Expired EP0114223B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823244033 DE3244033A1 (de) 1982-11-27 1982-11-27 Vorrichtung zum regeln, ueberwachen, optimieren, bedienen, zur informationsdarstellung und selbsttaetigen beseitigung von kurzschluessen in chloralkalielektrolysezellen
DE3244033 1982-11-27

Publications (2)

Publication Number Publication Date
EP0114223A1 EP0114223A1 (fr) 1984-08-01
EP0114223B1 true EP0114223B1 (fr) 1987-04-15

Family

ID=6179284

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83111271A Expired EP0114223B1 (fr) 1982-11-27 1983-11-11 Dispositif pour l'affichage des informations et la régulation automatique des cellules d'électrolyse chlore-alcalines

Country Status (3)

Country Link
EP (1) EP0114223B1 (fr)
JP (1) JPS59100281A (fr)
DE (2) DE3244033A1 (fr)

Family Cites Families (4)

* 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
IT1057012B (it) * 1976-03-11 1982-03-10 Porto Torres Spa Off Di Sistema di automazione di celle a mercurio per la produzione del cloro e soda caustica
DE2652774C2 (de) * 1976-11-19 1987-03-05 Siemens AG, 1000 Berlin und 8000 München Einrichtung zur Überwachung einer Elektrolyseanlage

Also Published As

Publication number Publication date
DE3370974D1 (en) 1987-05-21
DE3244033A1 (de) 1984-05-30
EP0114223A1 (fr) 1984-08-01
JPS59100281A (ja) 1984-06-09

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