阳离子聚合物处理油田采油污水研究

Using cationic polymer for treating the produced water of oilfields

为了使油田含油污水处理后能达到回用标准,通过阳离子聚合物与聚合铝复配对油田采油污水处理进行了研究.结果表明：聚合物分子量为120万,加入浓度为0.5～1.0 mg/L时,与聚合铝复配后,对采油污水中的悬浮物、含油量及CODcr的去除率分别达到99.7%,97.7%及92.0%,并使处理后水中悬浮物及含油量分别降低到1.2 mg/L及5.0mg/L,达到了油田回用水水质标准.复配体系对含油污水的处理效果受污水pH值及温度的影响,但影响比单独使用聚合铝时小.

In order to make the produced water of oilfields meet reuse standard, the study on treating the oily sewage in oilfields using cationic polymer and polymeric aluminum is made. The study result shows that, when the molecular mass of cationic polymer is 120×104, its mass concentration is 0.5～1.0 mg/L, and it is compounded with polymeric aluminum, the removal rates of the suspended substance, oil and CODcr in the oily sewage reaches to 99.7%, 97.7% and 92.0% separately. The contents of suspended substance and oil in treated sewage are reduced to 1.2 mg/L and 5.0 mg/L separately, and they reach to the standard of reuse water. The treating result of the formulation system of cationic polymer with polymeric aluminum to oily sewage is influenced by the pH value and temperature of the oily sewage, but the influence is less than that when polymeric aluminum is used alone.