稠油热采污水高效净水剂的研制

Research of Efficient Water Purifier Used in Heavy Oil Heat Recovery Wastewater

宋 丽

SONG Li

针对孤东油田现场常用水处理剂存在的问题，通过室内优选破乳剂、除油剂及絮凝剂，利用复合协同增效机理，复配得到适合该油田稠油热采污水的高效净水剂HQG，研究了HQG的最佳适用条件。结果表明，聚乙烯多胺类反相破乳剂Thg-A2具有较好的破乳性和除油性；自制的聚硅硫酸锌絮凝剂PSZS的絮凝效果好于常用的聚合氯化铁铝与聚合硫酸铁铝。将Thg-A2与PSZS按质量比1∶4复配制得的高效净水剂HQG对稠油污水的处理效果最好。在HQG的最佳适用条件（加量300 mg/L、温度80℃、沉降时间20 min、pH值为7）下，稠油污水处理后的含油量降至19.44 mg/L，除油率达到98.3%，悬浮物含量降至10.2 mg/L，水质清澈，透光率达94.2%，净水效果良好。图7表4参18

Aiming at the problems of water treatment agent commonly used in Gudong oilfield，an efficient water purifier HQG which was suitable for heavy oil thermal recovery sewage in Gudong oilfield was compounded by optimizing demulsifier，degreaser and flocculant in laboratory and utilizing the mechanism of compound synergy，and the optimum application condition of HQG was systematically studied. The results showed that polyamines demulsifier Thg-A2 had relatively good demulsification performance and oil removal performance. Self-made polysilicon zinc sulfate flocculant PSZS showed better flocculation performance than common polyferric aluminum chloride and polyferric aluminum sulfate. When the mass ratio of Thg-A2 and PSZS was 1∶4，the treatment effect of HQG on heavy oil wastewater was the best. Under the best condition such as 300 mg/L dosage，80℃，20 min settling time and 7 pH value，the oil content of heavy oil wastewater after treatment decreased to 19.44 mg/L，the deoiling rate reached 98.3%，the content of suspended matter decreased to 10.2 mg/L. The water quality was clear and the transmittance reached 94.2%，showing good water purification

10.19346/j.cnki.1000-4092.2019.03.030