Depleted Brine Concentration
Depleted Brine is a by-product of chlor-alkali plants that needs to be concentrated. Specifically Sodium Sulphate can be recovered as a valuable product.
Related Tools
Mechanical Vapour Recompression (MVR)
Multiple Effect Evaporator (MEE)
Forced Circulation Evaporator / Crystalliser (FC)
Falling Film Evaporator (FF)
Value
- Reduced equipment size through innovative plant design
- Minimal sodium chloride losses
- High purity sodium sulphate
- Potential to selectively recover sodium iodide
- Exact control of return brine concentration
- High plant availability
Process
- Feedstock of depleted brine from chlor-alkali plants – all concentrations
- Multiple Effect Evaporation and Mechanical Vapour Recompression are used to concentrate the brine
- Falling Film and Forced Circulation technology is used in combination
- Sodium sulphate can be removed by crystallisation and filtration
- Concentrated brine returned to the chlor-alkali plant
Flow Diagram
Elbow-Type Circulation Pump
Salt Slurry in Salt leg
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