Separation of sodium chloride and calcium chloride wastewater
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I’m seeking advice from experts regarding the process diagram for separating sodium chloride and calcium chloride from wastewater. The general flow is as follows: mother liquor → two-effect forced evaporator → cyclone (to separate some of the water and return it to the evaporator) → solution sent to the crystallization tank → separator (to separate NaCl) → flash evaporation of the CaCl2 aqueous solution → slicer. My email address is 13369101270@163.com
Three-effect evaporation integration can solve the separation of calcium chloride and sodium chloride, with a purity level of 96–98%.
Why would someone who has this information go to the trouble of finding it and sending it to you? What’s the purpose behind that?
Don’t you already have this general approach? What else is needed? To be more specific, it’s process control~
This post was last edited by sfy111 on 2018-11-3 at 20:10. I originally wanted to find a picture for you, but couldn’t locate one. It’s best to do a simulation first, as there are too many calcium chloride hydrates. Furthermore, due to phase equilibrium reasons, the solution after separation should be a saturated liquid; as much calcium chloride as can be separated still requires the mother liquor to be reused. If that doesn’t work, neutralize it with sodium carbonate first; then it’s simple to handle sodium chloride separately,,,
Sending you the flowchart would constitute a leak of information; you can refer to what the design institute has provided for the design of salt and calcium co-production. The salt chemical industry should all understand what this means.
The basic process should involve first evaporating and crystallizing sodium chloride, then concentrating the mother liquor through high-temperature evaporation to 70%, and finally cooling it down for slicing. Leave more messages on the site
Can’t we simply use a nanofiltration membrane to separate sodium chloride and calcium chloride, and then concentrate them separately? What are the advantages and disadvantages compared to?