Abstract: On the basis of turbulent theory and the results observed by high speed strobo-scopic microscopic photography for meso-and micro-mixing processes, a mixing mechanism was proposed and then a new mixing - precipitation model including micromixing, turbulent dispersion(meso-mixing)and backmixing(macro-mixing)was established to predict the par-ticls size distribution (PSD). By this model the values relevant to the critical points on the curves of the effects of mixing factors, i. e. ,stirrer speed and feed time on PSD were first quantitatively predicted. The results agreed well with those of experiments. This fact denotes that the model is quite reasonable, practical and capable of prediction.

摘要： 提出了1个包括3种不同尺度的微观混合、细观湍流分散及宏观返混在内的混合反应结晶过程模型,定量模拟了混合反应结晶过程中混合特性因素对产物平均粒径和方差的影响曲线上出现极小值的现象。对产物粒子粒度分布的模型预测与实验结果吻合良好。