Oil and gas field sewage separation device

The utility model discloses an oil and gas field sewage separation device which comprises a stirring air flotation structure, a scraping and floating structure is arranged right above the stirring air flotation structure, an oil-water separation structure is arranged right below the stirring air flotation structure, the stirring air flotation structure comprises a first water tank, a stirring rod is arranged in the first water tank and fixedly connected with a first motor, and a second water tank is arranged in the first water tank. The first motor drives the stirring rod to rotate; an air pump is arranged outside the first water tank, the air pump conveys air into the first water tank through a connecting pipe, the connecting pipe is arranged under the stirring rod, and a plurality of air outlet holes are formed in the connecting pipe. According to the oil and gas field sewage separation device, the spiral water channel is arranged, the contact time between sewage and an ultrafiltration membrane is prolonged