Numerical Study Of Internal Flow Field Of Hydrophobically Associating Polyacrylamide In The Stirred Tank

Stirred tanks are widely used in the chemical, food, biological engineering. Solid-liquid suspension is one of the most common in the stirred operation. So many researchers are interest in the fluid flow rule in solid-liquid stirred tank. Previous the mixing equipment design and amplification is dependent on experience theory, but the theory is not yet perfect. It can’t clear understand the internal flow field characteristic of stirred tank by using experience theory. With the computational fluid dynamics (CFD) are continuously improved, the CFD technology is used to research the flow field of stirred tank. In this paper, the flow of a new type of impeller in polyester factory is simulated with FLUENT software. And the fluid solid coupling in the stirred tank is simulated by ANSYS based on Workbench software.Dissolution process of hydrophobic associating polypropylene amine (AP-P4) was simulated by FLUENT software with the multiple reference frame method. The flow field velocity distribution, pressure, concentration profile and turbulent can distribution and its dissipation rate of the stirred tank are analyzed, and calculated the stirring power. Through analyzing the flow field of the new stirred tank, the agitating vane Angle is improved and simulated the flow of the improved stirred tank. Compared the concentration distribution before and after the improvement of agitation tank, and the particle concentration in the stirred tank is improved.In this paper, the fluid-solid coupling of stirred tank is preliminary calculated. The results show that the stress and strain distribution of impeller blade in the different condition. The conclusion can laid the foundation for further study the fluid-solid coupling of stirred tank.