Brine Purification in Chlorine-Alkali-Electrolysis
The chlorine-alkali-electrolysis is one of the most important processes in the chemical industry that leads to the production of two significant basic chemicals: chlorine and caustic soda. The chlorine-alkali-process is carried out industrially in two procedures: the diaphragm and the membrane process.
Sodium chloride (NaCl, brine) is the initial product for the chlorine-alkali-electrolysis. The cheapest method for brine poduction is the leaching of the rock salt storage in mines.
Introduction
In the purification of the gas stream, the focus is to prevent an under- or overdosing of the scrubbing liquid. Inline analyzer are used to prevent insufficient gas cleaning and in case of overdosage the higher material usage and associated costs. By a continuous measurement directly in the process, an optimum concentration management can be assured.
Dependence of the sound velocity on the NaCl concentration
Advantages of monitoring brine purification with LiquiSonic®.
The inline LiquiSonic® measuring technology enables a reduction of consuming manual laboratory measurements. This leads to cost-savings and personnel savings:
- time saving: 1 h per day
- amortization: below 12 month
Through the exact determination of the brine by LiquiSonic® measuring technology, the following aspects can be optimized:
- life of the membrane
- reduction of electrical energy (electrolysis)
- increase the yield of the overall process
- reduction of water or steam consumption (when dissolving the salt)
Installation
The LiquiSonic® sensors are installed in the transport pipeline DN80 after the dissolving vessel and pressure filter.
concentration range from NaCl: 0 to 30 wt%
temperature range: 0 to 100 °C
concentration range from NaCl: 0 to 30 wt%
temperature range: 0 to 100 °C
Brine purification
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