Based on computational fluid dynamics(CFD),the solid-liquid two-phase flow field in a succinic acid continuous crystallizer is simulated to explore the effects of different impeller structures,impeller installation height,and bottom shape on the dispersion of solid in the crystallizer.The results indicate that both the smaller inclination angle of the blades and the higher number of blades can help improve the mixing quality.The stirring power and impeller circulation efficiency increase with the decrease of blade inclination angle.If the installation height of the impeller is too high or too low,it will cause particles accumulation and affect the solid dispersion state.The optimal impeller installation height is 1/3H,showing higher cloud height and uniformity than other installation heights,and leading to a relatively low power consumption.A complex surface bottom can significantly improve the accumulation of particles at the bottom,and presents a better effect and consumes lower energy compared than the conical and W-shaped bottoms.
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