Crystallizers are normally used to separate out crystalline salts such as Sodium chloride, Sodium sulphate, Ammonium sulphate etc.
There are two types of crystallizers that Pleiad designs – Evaporation-based and Cooling-based. In an evaporation-based crystallizer the liquid is concentrated by heating it to a level where it forms a super saturated solution. This solution is then let into a settler tank (Pre-thickener vessel) which is specially designed, and the residence time controlled, such that the salt progressively settles at the bottom and the solvent with dissolved salt stays at the top. This liquid is then passed through centrifugation where the salt is completely separated from the liquid.
