Study on mixing field of salt tolerant polymer solution
The salt tolerant polymer (PAM) solution is a kind of viscoelastic uid. The polymer,whose molecular weight is more than 2.5×107g/mol, is apt to form ultra-molecular structures insolution with pretty high viscoelasticity. These characteristics considerably affect the ow patternsand the mixing process. It is far more difficult to mix viscoelastic fluid homogeneously than Newtonianfluid. Because the molecular diffusion rate of viscoelastic uid in mixing process is very low, improvingthe circulating performance of the agitator is the main path to increase the mixing velocity of theviscoelastic uid. In this study, structure and operation parameters of new type agitator–double helicalribbon screw agitator designed for the salt tolerant polymer are optimized via laboratory experiment.The experiment results show that, compared with the screw propeller, the new type agitator improvescirculation of uid field effectively and increases the homogenized rate. It reduces the mixing timefrom 4h to 2h. And the viscosity of the polymer solution increases by 10％. However, the energyconsumption does not increase.
salt tolerant polymer viscoelastic uid agitator uid field mixing time
L.H.Zhang M.G.Zhang X.G.Li D.Zhang B.Jiang
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
国际会议
The Fifth International Conference on Fluid Mechanics(第五届国际流体力学会议)
上海
英文
2007-08-15（万方平台首次上网日期，不代表论文的发表时间）