SEP Salt & Evaporation Plants Ltd.
In many salt production processes, the implementation of a brine purification process is required in order to remove calcium and magnesium ions that are present in the raw brine and would disturb the salt production process in several ways. By utilizing a brine purification process, the operation of the salt plant is more reliable, with minimum interferences, and furthermore, a well controllable premium product quality for industrial salt can be produced. Furthermore, a significant reduction of liquid purge is possible depending upon the choice of process and the configuration of the brine purification with the salt production process. A reduction of sulphate ions in the feed brine will lead to higher concentration factors in the evaporation process, which reflects in a better process economy.
This article introduces a brine purification process based on caustic soda, as well as a modified process utilising lime, soda and flue gas. It will also be shown that there is an economical threshold for designing the process depending upon the sulphate content of the raw brine.
Furthermore, the practice of recycling the mother liquor from the evaporation process to the brine purification plant will be explained.
|Create Date||July 6, 2018|