污水配制聚合物溶液增黏措施与机理研究

Tackification measures and mechanism of polymer solution prepared by sewage

丁玉娟 张继超 马宝东 周 敏 黄 漫 李美蓉 郝清滟

DING Yujuan ZHANG Jichao Ma Baodong ZHOU Min HUANG Man LI Meirong HAO Qingysn

本文通过正交试验分析胜利油田埕东污水造成配制聚合物溶液黏度降低的主要因素，研制提高污水配聚增黏的处理配方体系。经处理后污水配制的聚合物溶液初始黏度由12.0 mPa·s提高到32.0 mPa·s，增黏率达到167%；通过原子力显微镜(AFM)和动态光散射(DLS)对聚合物溶液微观形貌及聚集体粒径观察，分析配方的增黏机理：一方面，氢氧化钠沉淀Fe2+，消除了Fe2+对聚合物聚集体的破坏作用； AFM和DLS显示聚合物溶液聚集体粒径由80.5 nm增加到159.9 nm。另一方面，离子屏蔽剂可屏蔽Ca2+、Mg2+从而减弱了Ca2+、Mg2+对聚合物分子链的卷曲作用；AFM和DLS显示屏蔽剂使聚合物溶液聚集体的粒径由160.1 nm增大到208.5 nm。

The main factors that affected the viscosity reduction of the polymer solution prepared with Chengdong sewage from Shengli Oilfield were studied through the orthogonal analysis. Taking into consideration of the main factors from Chengdong sewage, the viscosity increasing agent was developed, the viscosity of polymer solution prepared with treated sewage could be increased from 12 mPa·s to 32 mPa·s, increasing by 167%; The increasing -viscosity mechanism could be analyzed by AFM and DLS , on the one hand, the method of precipitation with NaOH could eliminate the impact on polymer aggregates from Fe2+, and the particle size of polymer aggregates increased from 80.5 nm to 159.9 nm; on the other hand, Ca2+, Mg2+ could be shielded by the ion shield agent ,so that the crimp effect of polymer molecular chain from Ca2+, Mg2+ was reduced; and polymer aggregates size increased from 160.1 nm to 208.5 nm.