Study On Self-consumption And Energy Dissipation Structure Of High Pressure Desander

During the exploitation of oil and gas fields in China,due to the effect of high-pressure cyclone separator,the sand-bearing liquid flows out of the drain pipe with very large energy,and the sand particles and liquid under the action of high pressure will bring great damage to the pipeline along the pipeline.In order to eliminate the huge energy carried by sand and liquid and reduce the damage to the pipeline along the way,it is necessary to install the energy dissipation device at the outlet of the desander to eliminate the energy carried by sand and liquid,thus ensuring the safety of the pipeline along the way.In the past energy dissipation devices,the local head loss is usually caused by the sudden expansion and contraction of the area.In this paper,a more effective and novel energy dissipation device with self-dissipation and offset type is proposed.Through the collision between fluid and fluid,fluid and the wall of the tube and produce violent turbulence and shear,so that some of the kinetic energy into other forms of energy and consumption,thereby reducing the flow rate and pressure of the fluid in the tube.Consumption since the hedge type energy dissipation device’s working principle is: a fluid after energy dissipation device is divided into two equal and opposite direction of fluid,fluid in the tail of the buffer pool,the hedge between turbulence and shear formation,the fluid of high pressure downstream of the cyclone separator for energy dissipation,antihypertensive treatment,make line can be more secure,stable operation.The method adopted in this paper is numerical simulation method.By substituting the self-consuming energy hedging energy dissipation structure in the pipe into Fluent for simulation,the different combinations of self-consuming energy dissipation devices are compared to find and finally obtain a self-consuming energy hedging energy dissipation structure with the best and most convenient energy dissipation.The specific method is to change the inlet pressure and inlet speed of the energy dissipation structure,increase the number of series of the energy dissipation device,and change the pipe diameter of the energy dissipation device.The effects of different pipe diameters,different inlet pressures,inlet velocities and the number of series dampers on the flow field characteristics,pressure characteristics and energy dissipation characteristics of the energy dissipation structure are analyzed,and the effect of cavitation on the energy dissipation structure is considered.Finally,the structure of the energy dissipation device is optimized.Considering the effect of cavitation on the energy dissipation,the structure of the energy dissipater was optimized by adding a baffle,and simulation verification was carried out.In this paper,dozens of different simulation schemes have been established,and the energy dissipation rate of each scheme has been calculated.By processing and analyzing the test results,an optimal self-consumption hedge-type energy dissipation device has been determined,which provides a basis for future engineering research.