The utility model belongs to the technical field of oil-liquid separation, and particularly relates to an oil-liquid separation device which comprises a tank body, an exhaust port arranged at the top of the tank body, a pressure gauge arranged at the upper part of the tank body, a controller arranged on one side of the tank body, a heating device arranged beside the controller, a top cover arranged at one end of the tank body, a water inlet arranged on one side of the top cover and a splash-proof plate arranged in the tank body, a bottom cover is arranged at the other end of the tank body and connected with the tank body through a plurality of buckles, a
water stop plate is arranged in the tank body, a hydrophobic plate is arranged at the lower part of the
water stop plate, and an
ultrafiltration membrane is attached to the back of the hydrophobic plate; a
water storage area is arranged beside the
water stop plate, a water outlet is arranged below the
water storage area, an
oil storage area is arranged on the other side of the partition plate, and an oil outlet is arranged below the
oil storage area. By means of the heating
separation principle,
grease solidification is prevented,
impurity sedimentation is accelerated, oil liquid and water are separated preliminarily, the
density difference principle is adopted, large-particle impurities and oil liquid are filtered through the hydrophobic plates in a two-stage hydrophobic plate separation mode, and then smaller impurities and oil liquid can be filtered through the
ultrafiltration membrane, so that the oil liquid separation efficiency is improved. The oil-liquid separation is more thorough, more energy is saved, and the oil-liquid separator is more environment-friendly.