【摘要】 为解决某深井矿山因管道沉积造成的安全生产问题,通过对深井充填管道沉积机理进行研究,基于固液两相流相关理论,分别从细颗粒结垢和粗颗粒沉积2个方面来阐释两相流管道沉积机理。运用FLUENT流体动力学软件进行建模和分析,将浆体中固体细颗粒与清水混合的均质悬液作为连续相,较粗颗粒作为离散相,根据浆体中粗颗粒的浓度分布和管道速度分布特点来确定管道内颗粒物沉积规律。结果发现,充填两相流管道沉积的主要原因是细颗粒结垢和粗颗粒沉积相结合。数值模拟的两相流充填管道沉积过程与理论分析提出的粗细颗粒沉积物理模型相吻合。更多还原

【Abstract】 In order to solve the problems of safety production due to the deposition of pipeline in a deep mine,through the study on the deposition mechanism of deep level pipelines system,and based on solid-liquid two-phase flow theory,the deposition mechanism of two-phase flow pipeline is interpreted from the aspects of fine particulate fouling and coarse particle deposition.The FLUENT fluid dynamics software was used to model and analyze,the fine particles in slurry and the water mixed homogeneous suspension are seem as continuous phase,coarse particles are seem as discrete phase,and then according to the concentration distribution of the coarse particles in the slurry and the characteristics of the pipe velocity distribution,the characteristics of the particle deposition in the pipeline are determined.The results show that the scaling of the fine particles and the deposition of the coarse particles are the main reasons of two-phase filling flow pipe sediment.The numerical simulation of the two-phase flow filling process is consistent with the theoretical analysis.更多还原