Oily water purification system of our company is developed by absorbing the domestic and foreign advanced technology and experience in oil-water separation, in comprehensive utilization of the principles and using environment of the FT floating oil absorption machine, CYS separation-purification machine for oily wastewater, activated carbon filters. It is a set of advanced treatment process for oily wastewater treatment in purification, standardized discharge and recycling. The system is suitable for thermal power plants, oil refineries and oil storage reservoir in oily sewage disposal. After disposal, drainage water will meet the national standards GB8978 for comprehensive emission (water oil content ≤ 5 mg/L, SS ≤ 30 mg / L), while the collection of waste oil for recycling use. This system occupies a small size of area, easy in maintenance and operation, excellent in treatment effect, and with the advantages of low investment. It can be used as the alternative to the traditional method of flotation.