Computational Fluid Dynamics Approach to the Effect of Mixing and Draft Tube on the Precipitation of Barium Sulfate in a Continuous Stirred Tank  

用数值模拟方法分析混合和导流筒对搅拌槽中沉淀硫酸钡的影响

作　　者：王正 毛在砂 杨超 沈湘黔 

出　　处：《Chinese Journal of Chemical Engineering》2006年第6期713-722,共10页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China (Nos.20236050, 50134020) and the Special Funds for Major State Basic Research Program of China (973 Program, 2004CB217604).

摘　　要：The effect of mixing on the precipitation of barium sulfate in a continuous stirred tank is simulated numerically with different feeding location, feed concentration, impeller speed and residence time through solving the standard momentum and mass transport equations in combination with the moment equations for crystal population balance. The numerical method was validated with the literature data. The simulation results including the distribution of the local supersaturation ratio distribution in the precipitator, mean crystal size and coefficient of variation under different operating conditions compared well with experimental data in the literature. The effect of the presence of a draft tube on precipitation were also investigated, and it is suggested that the installation of a draft tube increased the mean crystal size, in general agreement with experimental work in the literature.

关 键 词：mixing  precipitation  stirred tank  COMPUTATIONAL fluid dynamics (CFD)  numerical simulation  SUPERSATURATION 

分 类 号：TQ-55[化学工程]