Deng Shubo, Zhou Fusheng, Chen Zhongxi, Xia Fujun, Yu Gang, Jiang Zhanpeng
Dept. of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China.
Huan Jing Ke Xue. 2002 Mar;23(2):69-72.
The research found anion polyacrylamide (HPAM) had positive and negative effects on oil-water separation. Polymer made oily wastewater's viscosity increase and reduce rising velocity, and polymer can also increase intensity of water films between oil droplets and lengthen coalescence time of oil droplets. Those were not in favor of settling and separation for oil droplets. The positive effects on separation were that polyacrylamide had flocculating activity and made small droplets contact each other and combine into big droplets. When polymer's molecular weight was 2.72 x 10(6), and concentration was less than 800 mg/L, polymer was in favor of oil droplets settling and separation. The prime reason for oily wastewater of polymer flooding difficult to dispose was that initial median diameters of oil droplets were small. The transverse flow oil separator can intensify oil droplets combination and shorten rising time. The locale experiments showed the separator was suitable for dealing with oily wastewater of polymer flooding.
研究发现阴离子聚丙烯酰胺（HPAM）对油水分离有正负两方面影响。聚合物使含油废水的粘度增加，上升速度降低，并且聚合物还会增加油滴间水膜的强度，延长油滴的聚并时间。这些都不利于油滴的沉降和分离。其对分离的积极影响在于聚丙烯酰胺具有絮凝活性，能使小油滴相互接触并聚合成大油滴。当聚合物的分子量为2.72×10⁶，且浓度小于800mg/L时，聚合物有利于油滴的沉降和分离。聚合物驱采出液含油废水难以处理的主要原因是油滴初始中位径较小。横向流除油器可强化油滴聚并，缩短上升时间。现场实验表明该除油器适用于处理聚合物驱含油废水。
