1.Cyclone separation technology has high oil removal efficiency when used with electric desalination sewage degreasing; 2.Using swirling degreasing technology can significantly reduce the amount of demulsifier added in sewage treatment; 3.Due to cyclone coalescence, cyclone recovered oil is easier to demulsify and dehydrate; 4.The equipment has simple structure, high degree of automation, stable operation, environmental protection and high efficiency.