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With the exploitation of domestic oil fields into the late , on water quality have become increasingly demanding . For the current injection water quality is not up and running reinjection water treatment plant problem of high cost , design a set of efficient processing of mined oily wastewater flotation - fine filtration process , and the establishment of a small experimental devices. Through theoretical analysis and experimental research, analysis of the produced water treatment methods commonly used to their disadvantage , and water quality is not up to the hazard and degreasing flotation mechanism was fully studied , analyzed to achieve flotation separation conditions , and the impact of Canadian pressure dissolved air flotation treatment effect factors were studied , and finally gives recommendations produced water flotation process operating parameters . Proposed flotation - filtration combined process of injection water, combined with fine filtration process , comparative tests , conducted research on the final effluent quality pre- flotation , filtration and filter regeneration cycle performance. Optimized by orthogonal experiment was flotation - fine filtration treatment process of optimum operating parameters: dissolved gas pressure is 0.32MPa, dissolved gas was 37.5mL / L, coagulant concentration of 45mg / L, pH value of 7 , flow 80L / h, raw water salinity of 25g / L, filtered flow 80L / h. And on this basis , derived flotation - filtration mathematical model , to provide guidance for the actual application .
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