Electric flocculation equipment for purifying oil gathering sewage and treatment method

The invention relates to electric flocculation equipment for purifying oil gathering sewage and a treatment method. The equipment comprises a primary filtering area, an electrolytic filtering area anda secondary settling area, wherein the primary filtering area comprises a first closed cavity internally provided with grid plates in a crossed manner, and the sewage flows on the grid plates in thefirst closed cavity to complete filtering and flow stabilizing effects; the electrolytic filtering area comprises a second closed cavity in which an electrode plate, a propeller and a filtering net bag are arranged; the end of the electrode plate is fixed to the top of the second closed cavity and vertically arranged in the second closed cavity, the propeller is arranged below the electrode plateand can enable sewage to rotate upwards; the filtering net bag is fixed to the side wall of the second closed cavity; the secondary settling area comprises a third closed cavity in which an inclined plate and activated carbon a