Inverse suction prevention and balanced air distribution type oil-water separation vacuum tank

The invention discloses an inverse suction prevention and balanced air distribution type oil-water separation vacuum tank. The oil-water separation vacuum tank comprises a tank body, the top end of the tank body is provided with an air outlet and an oil inlet, the lower middle section of the tank body is provided with an air supply port, the bottom of the tank body is provided with an oil outlet, and an inverse suction preventing air-liquid separation device, a filler layer and an oil collection tank are arranged in the tank body sequentially from top to bottom. The inverse suction preventing air-liquid separation device comprises a spraying plate, an inverse suction preventing filter basket and an air-liquid separation filter screen, and the spraying plate is arranged below the oil inlet and used for distributing oil flow. A space for air-liquid separation is reserved between the inverse suction preventing filter basket and an air-liquid separation filter screen. A middle partition is arranged in the middle