The application of Nantong Sansheng in saline water
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Nantong Sansheng has introduced HD brine purification technology, the aim of which is to add chemicals during a single brine treatment process in order to reduce the levels of calcium and magnesium in the brine, thereby extending the regeneration cycle of the resin towers. Do anyone have any successful experiences with this technology, and in what type of filters has it been successfully applied? Also, where should the chemicals be added during the treatment process, and is there any difference in the pressure regeneration cycle of the filters after their addition? To what extent can the calcium and magnesium levels in the feed brine at the inlet of the resin tower be reduced? What are the levels of calcium and magnesium in the secondary brine? By how much has the regeneration cycle been extended? Thank you.
It should be noted that no matter what method is used for adding chemicals, the levels of calcium and magnesium are always above the PPM range; it is therefore impossible to meet the specifications for the saltwater entering the system, unless reverse osmosis membranes or similar devices are used.
Under normal conditions, calcium and magnesium can be maintained at 0.5-0.8PPm.
Based on the solubility product of insoluble substances, under conditions of excessive alkalinity, calcium and magnesium can be reduced to 0.1 PPm. We didn’t achieve it due to the precipitation process
Is it due to the effects of reaction time and reaction temperature? Although it is an inorganic reaction that proceeds rapidly, dissolution and precipitation are reversible processes that can be influenced by external factors. Theoretically, this is related to Ksp; it is possible to consider altering the anion involved in precipitation, as well as using an excess of reactants, in order to shift the equilibrium toward precipitation.
It’s a problem with the precipitated particles; adding hydrochloric acid after filtration helps to dissolve those small particle precipitates； If the precipitated particles are large and there are no fine crystals, the problem is solved. I haven’t been on the forum for a long time, so my reply is late.