Cooling crystallisation Investigation of crystal growth in a fluidised bed Features - crystallisation from solutions - investigation of crystal growth in a fluidised bed - transparent materials for observation of processes Learning objectives/experiments - fundamental principle of cooling crystallisation - investigation of the factors influencing crystal growth -- oversaturation -- saturation time Specification [1] crystallisation from solutions in fluidised bed [2] stirred tank for preparation of a saturated solution [3] circuit for undersaturated solution with tank, 2 heat exchangers for heating and pump [4] bypass for oversaturated solution with crystallisation cell and 2 heat exchangers for cooling [5] removable and fillable crystallisation cell, PMMA [6] heating circuit with pump, tank, regulated heater [7] adjustment of flow rate in bypass using valves [8] measurement and control of temperatures in stirred tank, tank for undersaturated solution and in crystallisation cell Technical data Tanks - stirred tank: approx. 25L - for undersaturated solution: approx. 25L - heating circuit: approx. 32L Pump (solution) - max. flow rate: approx. 21L/min - max. head: approx. 38m Pump (heating circuit) - max. flow rate: approx. 6L/min - max. head: approx. 9m Crystallisation cell - diameter: approx. 40mm - height: approx. 80mm Heater power output: approx. 2kW Measuring ranges - temperature: 3x 0...100°C, 1x 0...80°C - flow rate: 1x 0...12L/min 230V, 50Hz, 1 phase 230V, 60Hz, 1 phase 230V, 60Hz, 3 phases UL/CSA optional LxWxH: 2000x800x1850mm Weight: approx. 255kg