When using polymer injection technology in oilfields, the problem is the separation of oil and water from the produced fluid. Based on the water quality characteristics of the polymer-containing sewage, an improved cyclone air-flotation separation device has been designed and tested in an oilfield wastewater treatment station to investigate the sewage treatment volume and return flow parameters. The effect of polymer ratio, split ratio, and bubble size on the air-flotation cyclone productivity is studied. The results show that when the treatment volume of polymer-containing sewage is 7 m3/h, the reflux ratio and the split ratio are 20% and 11%, respectively, the bubble size is large, the oil content in the wastewater after treatment decreases from 500.6 to 45.75 m3/h, and the suspended solids content decreases from 601.7 to 206.1 m3/h. Finally, the test results show that the wastewater after treatment complies with the requirements for the further filtration process.

在油田中使用聚合物注入技术时，问题是从采出液中分离油和水。针对含聚合物污水的水质特点，设计了一种改进的旋风气浮分离装置，并在某油田污水处理站进行了试验，考察了污水处理量和回流参数。研究了聚合物配比、分流比和气泡尺寸对气浮旋流器产能的影响。结果表明，含聚合物污水处理量为7 m3/h时，回流比和分流比分别为20%和11%，气泡尺寸大，处理后废水含油量降低从 500.6 到 45.75 m3/h，悬浮物含量从 601.7 到 206.1 m3/h。最后，