Induced Circulation Crystallizer

The induced circulation crystallizer design has been recently developed to provide additional agitation of the active volume of forced circulation crystallizers with the use of only one pump.

This Unit, as shown in Figure 1, operates similarly to a Draft Tube Baffle crystallizer but without the internal agitation device. The main applications are for evaporative crystallization cases. The unit also operates according to the Mixed Suspension Mixed Product Removal (MSMPR) principle and all options described for the other designs are of course available for this concept. The equipment is able to produce a narrow crystal size distribution. Like other designs, it can be fabricated in almost any material of construction. Performances and product quality are equivalent to those of a Draft Tube Baffle unit designed to the same specification, but appear to be limited to non-visqueous solutions as the induced flow would be quite limited when the mother liquor exhibits a high viscosity.

Figure 6 Figure 1 Induced Circulation Crystallizer

It has been successfully applied to the following productions:

• NaCl
• NH₄ClO₄
• NH₄Cl

For more products see in section Product Experience.