GD油田含聚含油污水复配絮凝剂体系实验研究

Compound Flocculant System for Oil Bearing Sewage Containing Polymer in GD Oilfield

( 长江大学 石油工程学院, 湖北 武汉4 3 0 1 0 0)

 

(College of Petroleum Engineering, Yangtze University, Wuhan Hubei 430100, China)

关键词: 含聚含油污水, , 无机絮凝剂, 有机高分子絮凝剂, 除油率, , 去浊率

Oil bearing sewage containing polymer in GD Oilfield has the properties of high viscosity, high oil content and more suspended particles, and the conventional single flocculating agent has the disadvantages of high dosage, loose coagulation and high cost. Oil removal rate and removal of turbidity were chosen as the evaluation values in this test, and flask experiment was used to evaluate the sewage processing effect of three inorganic flocculants and two organic polymer flocculants. Inorganic flocculant of poly (aluminium ferric chloride) with the concentration of 100 mg/L and organic polymer flocculant of PAM 4 with the concentration of 40 mg/L were respectively selected as the best flocculant. The oil removal rate and removal of turbidity of waste water were 92.3% and 90.7% respectively when poly (aluminium ferric chloride) and PAM 4 were used to dispose oilfield waste water. Some influencing factors such as temperature, pH value and settling time were investigated. The experimental results showed that the oil removal rate and removal of turbidity of oilfield waste water which was disposed by using compound flocculant system were the best when temperature of waste water was 40~60 ℃, pH value of waste water was 6~9 and the settling time was longer．The compound flocculant system has strong prospect in the processing of oil bearing sewage containing polymer.

10.3969/j.issn.1006-396X.2016.01.012