Study On The Motion Characteristics Of Particles And Oil Droplets In The Magnetic-Hydrocyclone Coupling Field

In view of the difficult treatment status of oil-water mixed phase separation in oilfield produced fluid,it is difficult to achieve efficient and economical separation effect by applying only a single separation technology,and in order to achieve the deep separation of oil-water mixed phase,the current research on magnetic field and hydrocyclone field coupling separation technology is in the stage of rapid development.Therefore,mastering the motion characteristics of magnetic particles and oil droplets in the magnetic core cyclone under the coupling effect of magnetic field and cyclonic field can deeply investigate the separation principle of mixed phases in the coupling field and promote the application of magnetic-hydrocyclone coupling technology.Firstly,the separation process of oil-water mixed phase in the magneto-spin coupling equipment is analyzed,and then the force state of the magnetic particles and oil droplets in the magneto-spin coupling flow field is initially analyzed,and the force models of the magnetic particles and oil droplets in the coupling flow field without and with the magnetic field are established,and the reasonable calculation method and solution parameters of the coupling field are determined,so that the magnetic-hydrocyclone coupling field action model can be accurately constructed.The boundary conditions of mixed-phase flow under the action of magnetic-hydrocyclone coupling field are determined,and the effects of magnetic induction strength,magnetic particles density,magnetic particles size,inlet flow rate,splitting ratio,oil phase content and oil droplets size on the coupling flow field distribution,oil droplets agglomeration and fragmentation,oil phase separation effect and magnetic particles transport behavior are investigated.Analyzing the motion characteristics of magnetic particles and oil droplets from the perspectives of flow field characteristics,oil droplets characteristics and changes in magnetic particles flow characteristics.In conclusion,if the magnetically conductive particles flow towards the center of the fluid domain at the appropriate speed,they will achieve a centripetal push on the oil droplets in the flow and increase the radial centripetal flow rate of the oil droplets;if the flow rate of magnetic particles are slow,they cannot efficiently push the oil droplets,or they tend to flow with the water phase towards the side wall,but instead push some of the oil droplets to the outer vortex area;if the magnetic particles centripetal flow rate are too fast,the collision with the oil droplets are stronger,easy to make the oil droplets emulsified,or lead to its short residence time in the coupled flow field,easy to not produce a push on the oil droplets that are discharged from the outlet.