组合式搅拌器对疏水缔合聚合物溶解特性的影响

机械搅拌是目前加速疏水缔合聚合物溶解熟化所广泛采用的一种方法。然而，聚合物溶解是一个从多相到单相、从低黏到高黏的变化过程，单一搅拌器用于聚合物的溶解过程存在诸多的问题。本文采用适用中低黏度的翼型搅拌器（KCX）和适用高黏度的锚框式搅拌器（MS）的组合，通过实验研究了翼型搅拌器不同操作方式（上翻或下压）和锚框式搅拌器不同转速等操作工况对聚合物溶解熟化过程中的作用，并将翼型搅拌器功率的实验数据与数值模拟的结果进行了比较。研究结果表明：翼型和锚框式搅拌器在聚合物不同的溶解熟化过程中其作用是不一样的；双搅拌器的同向运行可以促进罐内的流动和整体循环，加速聚合物的溶解和熟化；采用翼型搅拌器下压操作（KCXD）与MS搅拌器同向运转操作方式最利于聚合物的溶解和熟化。

Solubility of hydrophobically associating polymer with combined agitators

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.