Study On The Rheological Behavior Of Salt-tolerant Polymer And Optimize Stirrer

Polyacrylamide is used more and more widely owning to it's properties of heat-resistant, salt-tolerant and anti-microorganism with the development of the tertiary recovery. The rheological behaviors and the injection process of polyacrylamide are more important. In this paper, the viscoelastic behaviors of polyacrylamide solution are researched systematically and deeply by a steady shear flow. The effects of some factors on non-Newtonian viscoelastic property of polymer solution are analyzed. The research indicates that:(1) The viscosity and the coefficient of first normal stress deference of polyacrylamide solution decrease with the increase of the shear rate, and the shear stress increased with the increase of the shear rate.(2) The viscosity, the shear stress and the coefficient of first normal stress deference of polyacrylamide solution increase with the increase of the solution concentrations and molecular weight.(3) The viscosity, the shear stress and the coefficient of first normal stress deference of polyacrylamide solution decrease with the increase of the solution temperature.(4) The viscosity decreases with time passing by at any concentrations of Fe2+ and the viscosity drops down dramatically with the increase of Fe2+ concentrations.The curing installation of polyacrylamide is also optimized based on the rheological experiments. We design the double helical ribbon impeller used to quicken the curing process. The results of minitype experiment indicate that the double helical ribbon impeller can excellently finish the mixing task within 120min. The results also indicate the mixing power increases with the increase of the mixing speed and the solution concentration.According to the results of the minitype experiment, we carry on the variance analysis. It offers the gist to magnify the impeller.