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Monitoring of the concentration of sulfuric acid and oleum by means of sonic velocity

Apr 29, 2021

Conventional monitoring of sulfuric acid and oleum is carried out in many production facilities with manual sampling. These samples are then analyzed in the laboratory and a result is available a few hours later. In production, fast and accurate monitoring of the concentration is of great importance, as this influences the quality. It is precisely this determination of the concentration that can be ideally realized by means of sonic velocity with very high measuring accuracy.

It is a challenge for many users that although sulfuric acid and oleum occur in the same part of the plant, identification with a physical quantity alone is not possible. Therefore, empirical values have to be used, which can lead to major problems in case of a wrong decision. For this reason, the combination of two physical measurands for product identification has proven to be advantageous.

LiquiSonic® - The smart process monitoring system

By using a feature specially developed for this requirement, switching between the areas is fully automated with the LiquiSonic® measuring system from SensoTech GmbH. The concentrations are determined with a specially developed calculation model, displayed and, if desired, passed on to a process control system. Compared to the separate inline measurement of both components, the simultaneous inline measurement has clear advantages. While the respective calculation model must be selected for individual measurements, this work step is completely omitted. This has the advantage that the concentrations, especially around the switchover point, can be determined exactly at any time and in a matter of seconds. Manual identification and switching are no longer necessary.

If necessary, the maintenance-free measuring system LiquiSonic® offers the possibility of adjusting the calculation model to emerging additional components, gas bubbles and other disturbing factors. The device can thus be used very flexibly and adapted to changing process conditions.

The simultaneous monitoring of sulfuric acid and oleum with LiquiSonic® thus revolutionizes the workflow in production plants. By saving time-consuming and inaccurate sampling with the help of simultaneous inline measurement, an increase in efficiency is possible immediately after installation of the measuring system.

For three decades, SensoTech GmbH has been involved in the development, manufacture and sale of inline analysis systems for processes in liquids. With high-precision and innovative measuring systems installed worldwide for monitoring concentrations, compositions, property changes or substance transformations directly in the process, SensoTech decisively determines the state of the art. In addition to concentration and density determination, typical applications include phase detection and the monitoring of reactions such as in polymerization and crystallization processes. SensoTech analyzers set standards in terms of technological and qualitative value, user-friendliness and reproducibility of the measured values. Special calculation methods and highly developed sensor technologies enable reliable and fast measurement results even under difficult process conditions. The knowledge and experience of motivated and committed SensoTech employees have grown from a multitude of different applications at well-known customers from the chemical and pharmaceutical industry, food technology, semiconductor technology, the automotive and metal industry as well as many other sectors and also open up unimagined solution possibilities for new tasks.

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