旋转液膜反应器间隙对晶体粒径影响的研究

The influence of the gap width in a rotating liquid film reactor on the crystal size

采用适当的边界条件,联立N-S方程、对流-扩散-反应方程和粒数衡算方程,通过CFD模拟旋转液膜反应器中硫酸钡的沉淀反应,得出了不同转速条件下3个不同间隙晶体的体积平均粒径变化及粒度分布。结果表明:增大转速或间隙使晶体粒径变小、粒度分布变窄;粒径对转速的偏弹性大于对间隙宽度的偏弹性。并通过与实验值对比验证了方法的可靠性。

Under appropriate boundary conditions, the barium sulfate precipitation reaction was simulated by coupling the Navier - Stokes equation with convection diffusion reaction equations and the population balance equation. The volume mean diameter and size distribution of the crystals were evaluated for three different gaps with different rotor speeds. The reliability of the simulation method was verified by comparing the results with experimental data. The results show that the crystal size and crystal size distribution decreased with increasing gap width or rotor speed, and the partial elasticity of the crystal size as a function of rotor speed is greater than the partial elasticity of the crystal size as a function of the gap width.