基于CFD考察新型连续结晶罐的性能

运用计算流体力学(CFD)数值模拟的方法,研究了结晶罐不同功能区(混合区、结晶区)对谷氨酸结晶的影响.考察混合区和结晶区在不同搅拌转速、不同晶体粒径下,结晶罐内晶体颗粒悬浮均匀程度、溢流液与进料液量比例的变化情况.模拟结果表明:结晶罐内2个对搅拌强度不同要求的区间——混合区和结晶区在结晶过程发挥着不同的功能,混合区搅拌...

Study on performance of new continuous crystallizer based on CFD simulation

A computational fluid dynamics(CFD) numerical simulation method was used to investigate the influence of different functional areas of new crystallizer(mixing zone,crystallization zone) on the crystallization process of glutamate.To evaluate the uniformity of suspended solid particles and the change of the ratio of the overflow liquid and the feed liquid,the different stirring speeds and different crystal sizes of the mixing zone and the crystallization zone were investigated.The results show that the mixing zone and the crystallization zone,which have different demands for stirring intensity,play different roles in the crystallization process.The impeller of the mixing zone can effectively adjust the ratio of overflow liquid and feed liquid,and reduce the supersaturation of the feed liquid crystal;the impeller of the crystalline zone plays a main role in adjusting the suspension of the crystal in the whole tank.By adjusting the speed of impellers in each zone,the ratio of overflow liquid to feed liquid is above 15,and the tank crystal particles uniformity suspended is below 0.2.In that case,it is suitable for the continuous-crystallized glutamate and the preserve of crystal.