Method and system for monitoring the functionality of electrolysis cells

Inactive Publication Date: 2015-01-22
COVESTRO DEUTSCHLAND AG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0054]These items of information permit, for example, a targeted alarm

Problems solved by technology

These can also be designed dynamically and can even be optimized on the basis of historical data and learning-capable structures, however, they do not permit the qualitative or quantitative determination of errors in individual electrodes.
If the voltage of a cell only increases slowly, however, a defect can be presumed.
The better data base is

Method used

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  • Method and system for monitoring the functionality of electrolysis cells
  • Method and system for monitoring the functionality of electrolysis cells
  • Method and system for monitoring the functionality of electrolysis cells

Examples

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Example

[0095]The examples describe the novel method for monitoring industrial electrolysis single cells for two experimentally simulated malfunctions in detail.

[0096]In this case, the dynamic current-voltage characteristic of the single cells is analyzed for the monitoring. It results from the reaction of the cell 4 to the periodic alternating current signal, which is present as a harmonic wave of the direct current as a result of the ripple of the rectifier 1 in many industrial electrolysis facilities.

[0097]FIG. 1 shows the measurement construction in principle. Due to the ripple, the current I, with which the electrolysis cell 4 is supplied by the rectifier 1, is not constant but rather oscillates periodically by a small amount. This minimal current change also has an effect on the electrolysis cell 4, which reacts with periodic changes of the cell voltage U. The idea of the measurement concept is that the time curve of both the current and also the cell voltage is detected and by compar...

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Abstract

Method and system for monitoring the functionality of electrolysis cells for use in chlor-alkali electrolysis. The method uses the analysis of the current/voltage characteristic of the cells in relation to an AC voltage overlaid on the operating voltage

Description

[0001]The invention relates to a method for monitoring the functionality of electrolysis cells. Furthermore, the invention relates to a system for monitoring the functionality of electrolysis cells and in particular the use thereof in chlor-alkali electrolysis.[0002]The invention is directed to monitoring methods known per se for electrolysis cells, which conventionally make use of the detection of an averaged current-voltage characteristic of the cell.BACKGROUND OF THE INVENTION[0003]The monitoring of electrolysis facilities and the diagnosis of defective cells are fundamentally based on the measurement of process-relevant parameters such as temperatures, differential pressures, or also gas concentrations, but above all on the measurement of cell voltages and cell current. The cell voltage is very sensitive with respect to changes in the electrolyzes and is easily detectable, also at the individual cells.[0004]Outotec describes, in WO 2005 / 052700 A1, a monitoring system for copper ...

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Application Information

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IPC IPC(8): C25B1/14C25B15/00
CPCC25B1/14C25B15/00C25B1/46C25B9/206C25B15/02H01M8/04552H01M8/04582C25B9/77H01M8/04671Y02E60/50
Inventor VERFUFLORIANJORISSEN, JAKOBPOLCYN, GREGORTOEPELL, GABRIEL
Owner COVESTRO DEUTSCHLAND AG
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