Pressure And Separation Performance Research Of Recycle Dynamic Hydrocyclone

Crude oil contains a lot of fine sand which has damaged to the gathering and transportation system seriously. Static hydrocyclone being used now in oil field is inefficiency and fluctuation of oil flow also affects its efficiency.Confront with this practical problem, this paper adopts the most reasonable feed methord according to pressure distribution of centrifuge force field to design central feed dynamic hydrocyclone, combining the characteristics of centrifuge sand hydrocyclone. This paper makes lots of experiments to optimize pressure performance and separation performance through changing structural parameter and determines final industrial machine which has the most reasonable structural parameter. This paper simulates the flow field of the final industrial machine through CFD and analyzes flow field distribution in detail.This paper makes lots of experiments to optimize pressure performance though changing only one structural parameter, and finds that reducing height of impellers, reducing diameter of impellers, increasing diameter of underflow outlet, increasing diameter of overflow pipe, increasing diameter of overflow pipe outlet and increasing inlet deflection angle of impeller can improve pressure performance effectively.This paper makes lots of experiments to optimize separation performance though changing only one structural parameter, and finds that increasing diameter of impeller, reducing diameter of overflow pipe outlet and adding a cap to overflow pipe can improve pressure performance effectively.This paper determines structural parameter of final industrial machine after structural parameter optimization experiments. Final industrial machine has good pressure and separation performance. When flow is between 20m3/h and 40m3/h and the rotary frequency of impeller is 25HZ, underflow can reflux to entry flow. When flow is between 20m3/h and 40m3/h and the rotary frequency of impeller is between 25HZ and 40HZ, separation efficiency is higher than 93% and maximum to 98%.This paper simulates the flow field of the final industrial machine and analyzes flow field distribution in details. This paper optimizes structural parameter of impeller and finds that increasing inlet deflection angle from 16 degree to 90 degree can improve pressure performance. The central feed dynamic hydrocyclone has a favorable pressure and separation performance, and it will have a good prospect in industrial application.