Vacuum Crystallization Plant

In this type of crystallizer the crystallization is effected by cooling a solution or melt by the adiabatic evaporation of the solvent at pressure decrease. Hence no surfaces to serve the heat exchange are needed which are susceptible to incrustation in case solutions, separating salts, are handled and thus the performance of the plant decreases. Consequently the demand for an operation with large cleaning intervals is met. Vacuum crystallization plants may be designed single-stage and multi-stage. Application of steam ejectors, application of refrigerating agents (refrigerating machines), use of sulfuric acid of soda lye as condensation agent.