反应釜内搅拌混合特性研究

Study on mixing characteristics in reactor

针对新型搅拌器(三层旋桨式搅拌器)在反应釜中搅拌效果的问题,运用了计算流体力学(CFD)的方法,以工业上常用的框式搅拌器作为对比试验对象,对这两种搅拌器在Solid Works软件中进行了三维建模,然后将建好的模型导入Fluent软件中进行了流场仿真分析。数据后处理应用Tecplot和Excel软件,从Fluent数据中提取出了两种搅拌器所形成的流场、有机溶液分布云图和选定横截面的有机溶液的体积分数,从这些数据中分析研究了新型搅拌器在反应釜中的搅拌混合效果。研究结果表明:新型搅拌器所形成的轴向混合流场比框式搅拌器形成的轴向循环流场更为科学,搅拌效果更好,而且新型搅拌器搅拌后的有机溶液分布更为均匀。

Aiming at the problem of stirring effect of a new agitator（three-layer propeller agitator） in reactor, the grid agitator was used as the comparative test object in the method of computational fluid dynamics. The two agitators was modeled in Solid Works software, and then the built model was imported into Fluent software for flow field simulation analysis. The Tecplot and Excel software were used in data post processing. From the analysis result data, these were found that the flow field, the organic solution distribution cloud diagram and the volume fraction of the organic solution of the selected cross-section. From these data, the mixing effect of the new stirrer in the reactor was studied. The results indicate that the axial mixing flow field formed by the new type of agitator is more scientific and the stirring effect is better than grid agitator. In addition, the distribution of the organic solution of the new agitator is more uniform.