A double loop optimization method for gasoline online blending

Direct-blending component oils bring great disturbance to the online gasoline blending control. A double loop optimization strategy with nested outer and inner loops is proposed, and the optimization strategy combined with a case study is illustrated in detail in this paper. The real industry application demonstrates that this new optimization strategy can not only take account of the bottom oil's properties deviation, but also timely detect the fluctuation of gasoline properties from the direct-blending oils. In this way, the final gasoline product properties can be controlled quite well at one time, and the re-blending times of final product have been much reduced compared with the conventional single loop optimization method.