The invention provides a self-overflow type
graphene oily
sewage treatment device. A tank is a horizontal cylindrical sealed container, and a
nitrogen inlet is formed in the top of the sealed container; an oily
sewage inlet is connected with an oil-water separation cavity; a water distribution
pipe is arranged at the periphery of an upper part of the oil-water separation cavity; a plurality of
water spray pipes are uniformly distributed on the water distribution
pipe; a primary oil collection cavity is formed in the right side of the oil-water separation cavity, and a baffle is arranged between the oil-water separation cavity and the oil collection cavity; a
sewage cavity is formed in the right side of the oil collection cavity, and a
water production cavity is formed in the right side of the sewage cavity; the water distribution
pipe is arranged between the sewage cavity and the
water production cavity, and
water spray pipes are arranged on the water distribution pipe; a
graphene based mesh film is distributed on the upper part of the
water production cavity and below the
water spray pipe; an oil collection tank is arranged at the
tail part of the
graphene based mesh film; an opening is formed in the bottom of the oil collection tank and is connected with a secondary oil collection cavity; and a dirty oil outlet is formed in the bottom of the oil collection cavity. The device disclosed by the invention has the advantages of high oil removal efficiency, small floor space, high
pollution resistance, broad water inlet quality requirement, capacity of well adapting to oilfield sewage conditions and simple matching treatment process flow.