钻井碟式分离机油-水-固三相分离模拟与实验

Numerical Simulation Analysis of Oil Water Solid Three-phase Separation in Disc Separator

根据泥浆的性能参数,基于Fluent软件对碟式分离机的分离性能进行了数值模拟研究。分析结果表明碟式分离机内的流体压力随着角速度及半径的增大而提高,流体压力分布与理论趋势相一致;水相聚集在碟片组的周围,由出水口排出,油相分布在碟片中心区域,经出油口排出,而固相杂质沉积在转毂壁面。碟式分离机的处理量对分离效率有较大的影响,当处理量超出分离机合理的处理范围后,分离效率会迅速降低;随着油液粒径增大,碟式分离机的分离效果提高,出水口含水率也随着油液粒径的增大而增加;分离效率随着转速的增大而迅速提高,考虑到转速的增加对转鼓壁应力的影响,因此转毂的工作转速不宜过高。

According to the performance parameters of the mud,the separation performance of the disc separator is numerically simulated with Fluent software.The results show that the fluid pressure in the disc separator increases with the increase of angular velocity and radius,and the fluid pressure distribution is consistent with the theoretical trend.The water phase is gathered around the disc set and discharged from the water outlet.The oil phase is distributed in the central area of the disc and discharged through the oil outlet,while the solid impurities are deposited on the wall of the hub.The processing capacity of the disc separator has significant influence on the separation efficiency.When the processing capacity exceeds the reasonable processing range of the separator,the separation efficiency will rapidly decrease.With the increase of the oil particle size,the separation performance of the disc separator is improved,and the water content of the water outlet also increases with the increase of the oil particle size.The separation efficiency increases rapidly with the increase of rotating speed.Considering the influence of the increase of rotating speed on the drum wall stress,the rotating speed of the hub should not be too high.