POLYMERIC FILM EVAPORATION TECHNOLOGY
DAF
CLARIFIERS
MEMBRANE DISTILLATION SYSTEM
BELT FILTER PRESS
OIL REMOVAL SYSTEMS
MULTI EFFECT EVAPORATORS
COD/BOD REMOVAL
MEMBRANE TECHNOLOGY

The crystallizer is a multi stage thermal separation system. The flash evaporator is a forced circulation suppressed boiling evaporator utilizing a shell and tube heat exchanger to heat the product to above its boiling temperature.

Boiling is prevented from taking place on the heat transfer area by applying a backpressure to the outlet and the product is then flashed into a separator. The flash vapors that result are condensed in a surface condenser and the concentrated product is pumped out of the separator. For products, which tend to crystallize during concentration or those that contain a high percentage of suspended solids, flash evaporation is the most suitable method. This compact unit combines a heat exchanger, an external separator, and a vacuum system with a condenser for vapors generated. It is designed to operate as a forced circulation, suppressed boiling evaporator.

By using liquid static head above the heat exchanger or a special orifice piece in the discharge line, vaporization is arrested until the product liquor flashes into the separator. Any crystallization then occurs and a suspended slurry results. High liquid velocity flow combined with induced turbulence deters scaling on heat transfer surfaces, and promotes longer production runs. The solution with crystals is taken to centrifuge for salt separation and the salts are reused in the process.