Combined production of NaCl and CaCl2

Combined production of NaCl and CaCl₂

Highlights

Recovery of high purity NaCl and CaCl₂ from waste water discharged from the soda industry to produce:

  • NaCl > 99 %
  • CaCl₂ flakes (78–80 %) or granules (95–98 %).

Feedstocks

Soda waste waters – all concentrations


Process Characteristics

  1. Selective crystallization of NaCl utilizing MVR or multiple effect
  2. Utilization of gypsum slurry process to minimise scaling
  3. High purity CaCl₂ product with low NaCl concentration
  4. High CaCl₂ concentrations achieved by evaporation minimises energy consumption for calcining or granulating
  5. Drum flaker and calciner for flakes
  6. Fluid bed granulator for granules

Plant Characteristics

  • Wide range of feed compositions
  • MVR or multiple effect depending on utility costs
  • Exact product concentration
  • Variable product configurations
  • High steam economy
  • Low fuel consumption
Dry NaCl on Ship
Dry NaCl on Ship
CaCl₂ Circulation Line
CaCl₂ Circulation Line

Flow Diagram

 
 

Related Technologies

SEP Salt & Evaporation Plants Ltd
Neuwiesenstrasse 69
CH-8400 Winterthur
Switzerland

Phone +41 52 260 50 70
Fax      +41 52 260 50 80
info@sepwin.ch