Dynamic simulation and control of crystal-size distribution in a continuous crystallizer

A continuous crystallizer was modeled as a series of smaller units containing 'packets' of crystals that move vectorially in particle phase space.;Dimensional analysis of the population model led to the condition under which the CSD remains virtually independent of process dynamics. This resulted in a control algorithm that is comprised of a vector equation relating particle-residence time to growth rate (G) and an algebraic expression for optimal servocontrol of nuclei density (n;A simulator (CRYSTAL.BALL) was developed to study dynamics and control of crystal size distribution (CSD). The results indicate that CSD transients including cycling can be virtually eliminated if precise estimates of n...