Design And Experimental Research Of Oil/Water Separator With Super-hydrophobic Films

According to the characteristics of super-hydrophobic films in the process of separation, a suit of oil/water separation device has been designed so that the super-hydrophobic/super-oleophilicity films can be applied to the filed of oil/water separation. The device has advantages of high space utility and convenient operation.A problem of the separation device has been analyzed by experiment and solved by inclining the oil/water separator. The influence of incline angle on separation effects has been analyzed and studied. Experiments have been performed by changing the connection (series and parallel) of the three separation units. It is indicated that the separation device can handle oil/water mixture with large flow rate when the three single separators are connected in parallel. However, owing to the resistance between separation units, the separation device only can handle oil/water mixture with small flow rate when connected in series, and three single separators connected in series are not as good as in parallel on the disposing capacity.Factors, such as pressure difference on both sides of film, oil/water mixture flow rate and oil initial content have been studied on the separation effect on condition that the device be inclined (the obliquity is 4.12°) and connected in parallel. It is shown that oil content in outlet water with the increases of oil/water mixture flow rate and oil initial content, and the greater the flow rate, the effects is more significant; while the influence of pressure difference is small; These factors influence one another, Through reasonable control of these factors, the separator can handle oil/water mixture with large flow rate or a wide range of oil initial content. According to the Karl Fischer principle, a set of titration equipment which can be used to measure the trace water in oil has been set up and tested. Water content in oil in different pressure and oil initial content has been measured. It is indicated that water content in oil is small and little change when separating films are operated under 14.72kpa (equal to 150cm water column). While operated over 15.70kpa (equal to 160cm water column), the quantity of water permeating from separating films will increase with pressure difference and decline with oil initial content. The oil permeating velocity of separating films is measured, indicating that the oil permeating velocity of separating films and pressure difference on both sides of film have a linear relation.