Reliable measurement in electrolysis applications
Proline Promag P 300/500 is immune to electrical interference
Westlake Vinnolit produces chlorine, caustic soda, and hydrogen at its Gendorf site (Germany) using chlor-alkali electrolysis. Chlorine is a precursor for the production of PVC plastic. Caustic soda is an important base chemical, for example for the production of cleaning agents. Precise, reliable flow measurement which is immune to electrical interference is essential in the production of these chemicals. Promag P 300/500 meets these requirements with the "floating measurement" option.
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Proline Promag P 300 delivers precise, reliable measurement results as well as additional process information.
The result
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Highly accurate and reliable monitoring of process stability is ensured: Immunity to electrical interference in the medium is ensured. Precise, reliable measured values support an increase in overall system productivity.
The customer requirement
A smooth chlor-alkali electrolysis requires reliable monitoring of the flow of liquids such as caustic soda, hydrochloric acid and brine. With conventional electromagnetic flowmeters, the medium must be grounded electrically for proper measurement. This isn't possible in this case, where there are voltages up to 500 volts and currents up to 17,000 amperes. There is a risk that electrical potential differences between the medium and the measuring device can quickly corrode the electrodes.
Our solution
With Promag P 300/500 and its "floating measurement" option, Endress+Hauser offers a solution to enable precise, reliable measurement results even in these demanding applications. The potential of the process medium is picked up by a reference electrode and supplied to the amplifier. At the same time, the amplifier is electrically isolated from the ground potential of the power supply. This prevents harmful equalizing currents, which would have a negative influence on the measurement result.