关键词: 疏水缔合聚合物, 组合式搅拌器, 聚合物溶解

Abstract: Mechanical agitators are widely used in accelerating the dissolution of hydrophobically associating polymer. However，the polymer dissolution process changes from multiphase to single phase，from low viscosity to high viscosity. Many problems occur in using single agitator for polymer dissolution. In this paper，the effects of double agitators on polymer dissolution were investigated. The double agitators were composed of inner hydrofoil impeller KCX suitable for low and medium viscosity fluid and outer anchor and frame type impeller MS suitable for high viscosity fluid. Different kinds of operating conditions were also studied，such as different pumping directions of impeller KCX （up and down）and different speeds for impeller MS，and a comparison of experimental and numerical simulation result of KCX impeller's power was performed. The experimental results showed that different agitators had different effects during polymer dissolution. The same rotation direction of inner impeller KCX and outer impeller MS increased flow rate and overall circulation in stirred tank，and accelerated dissolution of hydrophobic associating polymer. The best way for polymer dissolution is that impeller KCX operates with down-pumping direction and rotates with the same direction of MS.

Key words: hydrophobic associating polymer, combined agitators, polymer dissolution