ML-?Oilfield Sewage Flocculation And Filtration Processing Technology Research

After oil field in the process of production, oil-water separation produces a large number of the oily sewage. Oily water if discharged directly without treatment, not only can cause the pollution of soil, water, therefore, sewage recycle become the only choice. Due to add medicine production process, the influence of such factors as oil field produced sewage water quality is very poor, with the deepening of oilfield development, the composition of increasingly complex, suspended solids and oil droplets in water is more and more small, can not adapt to the existing technology, the difficulty of water treatment is becoming more and more big. This paper mainly from two aspects of flocculation and filtration,Research ML-? oilfield sewage treatment technology, strive to make the reinjection sewage water quality can achieve oilfield injection water quality standard.Through study on flocculation, optimization in addition to good flocculant flocculation effect, and the dosage. Experimental results show that the polymerization aluminum flocs formed dense, non-friable, settlement after 30 min liquid is clear, when the polymerization aluminium added amount in 0.7 ~ 0.9 mg/L, treatment effect is best; And aggregation, ferric sulfate, and active iron silicate, aluminum sulfate to form flocs loose, settling effect is poor. Flocculant and antiscale agent compatibility experiments show that the anti-scaling agent to join have a negative impact on the performance of the flocculants, among them: two anti-scaling agent affected the performance of organic flocculant, influence on the performance of the inorganic flocculant. When use, therefore, pay attention to avoid the inorganic flocculant and antiscale agent in the system used at the same time, can use "add flocculant- settling separation- plus antiscale agent" processing order.Through indoor simulation experiment, from the surface of the filter material properties, the size of the filter material and gradation, and the size of the suspended solids, and filtration equipment structure point of view, after the water suspended solids is analyzed and the reasons of excess oil, put forward the improvement measures and solutions.