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1.
An effective practical approach that allows not only a significant reduction in the scope of practical experiments in the course of studying suspension separation processes in hydrocyclones, but also makes it possible to assess the intensity of random components of the processes and define the interrelation between such components and hydrodynamics of flows in a hydrocyclone is presented. Within the frames of the developed probabilistic‐statistical model of suspension separation in hydrocyclones on the basis of statistical self‐similarity properties, a relationship was found between determined and random components of the processes. This allowed transitioning from three‐parameter probability density functions for suspension particles in hydrocyclones to two‐parameter functions; thus significantly improving the efficiency of practical application of the developed model. 相似文献
2.
水力旋流器内固相颗粒时均流场及脉动特性的研究 总被引:1,自引:0,他引:1
利用一种新型的激光多普勒测速仪———粒子动态分析仪(PDA),对水力旋流器中固相颗粒的时均流速、绝对湍流度、相对湍流度等流动参数进行了实测研究,给出了更全面的关于水力旋流器内固相颗粒流速分布的信息,并探讨了湍流脉动对水力旋流器分离过程的影响。 相似文献
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《矿业科学技术学报(英文版)》2014,24(5):643-648
In the present study, a three-dimensional computational fluid dynamics simulation together with experimental field measurements was applied to optimize the performance of an industrial hydrocyclone at Sarcheshmeh copper complex. In the simulation, the Eulerian–Eulerian approach was used for solid and liquid phases, the latter being water. In this approach, nine continuous phases were considered for the solid particles with different sizes and one continuous phase for water. The continuity and momentum equations with inclusion of buoyancy and drag forces were solved by the finite volume method. The k–ɛ RNG turbulence model was used for modeling of turbulency. There was a good agreement between the simulation results and the experimental data. After validation of the model accuracy, the effect of inlet solid percentage, pulp inlet velocity, rod inserting in the middle of the hydrocyclone and apex diameter on hydrocyclone performance was investigated. The results showed that by decreasing the inlet solid percentage and increasing the pulp inlet velocity, the efficiency of hydrocyclone increased. Decreasing the apex diameter caused an increase in the hydrocyclone efficiency. 相似文献
5.
旋流器在德兴铜矿铜钼分离工艺中的应用 总被引:2,自引:1,他引:1
介绍了德兴铜矿铜钼混精用旋流器脱泥脱药后再选钼的试验结果、旋流器的选型与计算,以及旋流器的应用所取得的技经指标。实践表明,铜钼混精经旋流器脱泥脱药预处理后,浮选能力提高了33 41%,选钼回收率和精矿品位分别提高了11 14和0 63个百分点,硫化钠消耗和选钼成本分别降低了32 17%和50%。该工艺对德兴铜矿选钼生产起到重要的作用。 相似文献
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The peculiarities of practical implementation of a probabilistic‐statistical model for a hydrodynamic stage of particle classification process of liquid‐solid polydisperse systems in cylinder‐conic hydrocyclones of small size have been investigated. Within reasonable assumptions, stationary solutions of the Fokker‐Planck‐Kolmogorov kinetic equation were obtained for the considered separation process. In order to describe changes in characteristics of suspension separation in hydrocyclones it was proposed to use stationary distributions, which parameters depend not only on hydraulic and dynamic features of flows inside an apparatus, but also are determined by relative magnitudes of the impact of particle classification and centrifugal forces in comparison with the intensity of random perturbations. 相似文献
8.
The process of de-oiling produced water from offshore oil fields was evaluated using hydrocyclones. An experimental design was employed and the results were used to create an empirical model that describes the reduced separation efficiency as a function of different concentrations of infeed and the pressure drop. A study was made of the procedure for preparing the oil-water emulsions used here in order to reproduce the TOG of the produced water generated in oil field. A procedure to verify the operation of these devices demonstrated that six hydrocyclones operating in tandem can attain the legally acceptable concentration of oil in the treated effluent. 相似文献
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水力旋流器最早于20世纪30年代在荷兰出现。由于它结构简单、成本低廉,易于安装和操作,体积小,处理能力大,运行可靠,分级分离性能优良等特点,使得水力旋流器成为一种广泛应用的分级分离设备。然而,水力旋流器仍然存在需要进一步的研究和论证的具有挑战的方面, 相似文献
10.
采用电阻应变式压力测定仪及在线数据自动采集与实时处理系统,在国内外首次对水力旋流器内湍流压力场的脉动结构进行了系统的实测研究。结果表明,在溢流管端以下内旋流区域中,流体的压力脉动强度以及压力相对脉动强度均很大,该区域是一个湍动能量损失严重的区域;水力旋流器中绝大部分区域内的脉动压力均服从Gauss分布;但在柱段区域的个别地方以及锥段上部内旋流区域的许多地方,脉动压力则拒绝Gaus假设,在这些部位湍流具有明显的间歇性特征。 相似文献