摘要：

对中石化沧州分公司的炼化污水进行室内混凝净化处理实验研究，并从微观及宏观等多角度进行评价表征，结果表明：使用聚合氯化铝(PAC)的除油效率明显优于聚合硫酸铁(PFS)、聚合氯化铝铁(PAFC)和聚合硫酸铝(PAS)。PAC投加量为50 mg/L时的除油效率达到91.2%，较其他凝聚剂高10%以上。当阳离子聚丙烯酰胺(CPAM)作为絮凝剂与PAC复配使用时，其最佳投加量为4 mg/L；在向紧凑型高效分离设备内协同投加化学混凝药剂时，应严格控制核心分离区的平均湍流强度，降低湍流剪切对絮体或矾花的剪切作用，提高混凝净化处理效果。

关键词: 炼化污水, 凝聚过程, 絮凝过程, 湍流强度, 除油效率

Abstract:

An indoor coagulation and purification treatment on refinery wastewater in Sinopec Cangzhou Branch Corporation was studied, and its treatment effect was evaluate and characterize from micro and macro perspectives. The results showed that the oil removal efficiency of polyaluminum chloride(PAC) was obviously better than that of polyferric sulfate(PFS), polyaluminum ferric chloride(PAFC) and polyaluminum sulfate(PAS). When the optimum concentration of polyaluminum chloride was 50 mg/L, the oil removal efficiency was up to 91.2%, which was 10% higher than other flocculants. When cationic Polyacrylamide was used as a coagulant together with polyaluminum chloride, its optimum dosage was 4 mg/L. Therefore, when chemical coagulants were added to the compact and high efficiency separation equipment, the average turbulence intensity of the core separation zone should be strictly controlled to reduce the shear effect of turbulent shear on flocs or alum, so as to improve the effect of coagulation treatment.

Key words: refinery wastewater, coagulation process, flocculation process, turbulence intensity, oil removal efficiency

中图分类号: 

• X703.1