High Performance Pump for Continuous

The high­est pri­or­i­ty for con­tin­u­ous­ly oper­at­ed mass crys­tal­liz­ers is a con­stant and repro­ducible yield with high prod­uct qual­i­ty. In the major­i­ty of cas­es this is asso­ci­at­ed with pro­duc­ing coarse-grained crys­tal­lized mass­es with a homo­ge­neous and ide­al­ly nar­row par­ti­cle size dis­tri­b­u­tion (PSD).
A typ­i­cal appa­ra­tus for the con­tin­u­ous crys­tal­liza­tion of a mass prod­uct is the DTB  (Draft Tube Baf­fled) crys­tal­liz­er, equipped with a draft tube and an axi­al pump impeller. Par­tic­u­lar­ly impor­tant for a con­trolled par­ti­cle size dis­tri­b­u­tion and, hence, a con­sis­tent prod­uct qual­i­ty, is the effi­cien­cy of this pump. This goes hand in hand with the reduc­tion of local shear to avoid crys­tal attri­tion and hence uncon­trolled nucle­ation with fine par­ti­cles or even a bi-mod­u­lar PSD.
The Eka­to Torus­jet-impeller has been devel­oped by exten­sive exper­i­men­tal stud­ies on impeller effi­cien­cy com­bined with CFD inves­ti­ga­tions of the flow pat­terns in the DTB. Its unique blade geom­e­try com­bined with a cor­re­spond­ing set of guid­ing vanes and an opti­mum draft tube design avoids hydraulic loss by vor­tex for­ma­tion. Dras­ti­cal­ly low­er oper­a­tional cost and opti­mum prod­uct qual­i­ty are the result.