Oil-water recovery system

The utility model relates to an oil-water recovery system and belongs to the field of oil-water separation and recovery. The system comprises a dirty oil buffer tank and a sewage buffer tank, a first oil-water interface detection device is arranged on the dirty oil buffer tank, and an oil discharge port is further formed in the dirty oil buffer tank; a second oil-water interface detection device and a water outlet are arranged on the sewage buffer tank; the dirty oil buffer tank is provided with a first connecting port, the sewage buffer tank is provided with a second connecting port, a communicating pipeline is connected between the first connecting port and the second connecting port, and the first connecting port is lower than the oil discharge port; and/or the second connecting port is higher than the water outlet. According to the oil-water recovery system disclosed by the utility model, sewage below the first oil-water interface in the dirty oil buffer tank is discharged into the sewage buffer tank thro