Rapid separation system for oilfield produced water

The utility model discloses a rapid separation system for oilfield produced water, which is characterized in that a primary oil-water separation device is arranged, so that oily wastewater is forced to continuously change the direction and the flow speed, the coalescence frequency of water drops and oil drops in the oily wastewater is increased, countless fine oil drops are continuously wetted, collided, captured and coalesced, and the oil-water separation efficiency is improved. The oil phase is retained on the surface and in pores of the strong oleophylic and hydrophobic oil removal element, the oil particles are coalesced into large-particle-size oil droplets along with the increase of the oil particles, and the water phase is discharged from a water outlet of the first-stage oil-water separation device; in the layer-by-layer physical treatment process of the rotational flow pressurization deep oil removal device, the first-stage interface coalescence purification device and the second-stage interface coal