Papers by Keyword: Hydrocyclone

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Authors: Hui Li, Xiao Jun Guo
Abstract: Based on the principle and method of computational fluid dynamics (CFD), using the software, FLUENT, the inner water flow field in a hydrocyclone with air column was simulated and the flow details were studied roundly. This article analyzed the three-dimensional velocity field distribution, pressure field distribution and testified the reliability of numerical simulation to a certain extent. The “mixture” model was used to simulate the air column the first time and contrasted with experimental result, the simulated effect was proved effective. The results of this paper provided a good base and reference for the further research of solid-liquid separation.
Authors: Da Li, Fang Qin Cheng, Jian Feng Li, Yun Shan Guan
Abstract: Despite the widespread use of hydrocyclone in the process of potash ore desliming, its accurate design is often difficult because the feed composition is complicated and the viscosity is high in the brine system. In this study, a numerical approach based on computational fluid dynamics (CFD) was performed to describe the flow field. The numerical simulation of flow pattern in hydrocyclones for potash ore desliming was presented. Some basic information concerning the velocity and pressure distribution is given, and the results can be used as the fundamental basis for its design.
Authors: Yung Sheng Lai, Chun Wei Fu, Chuan Yi Pan, Rome Ming Wu
Abstract: This study proposed a new type of hydrocyclone. A rotating ring containing one pair of symmetric blades was attached to the overflow pipe. The momentum of the inlet fluid drove the ring/blades to rotate, and the rotating blades swept small-sized particles to the hydrocyclone wall to be discharged from underflow. This design can destroy circulation flow on hydrocyclone roof and make small-sized particles to be separated.
Authors: De Hai Chen, Ming Hu Jiang, Li Xin Zhao, Yong Zhang
Abstract: The flow field of gas-liquid-solid three-phase hydrocyclone was analyzed by using the software FLUNET. We have researched different structural parameters on the effect of degassing and degritting. The result shows that the change of inverted cone length ratio, inverted cone diameter, the form of liquid outlet hole structure and the angle of vent structure have some influence on degassing and degritting. Simulation results provides a good technical support for the optimization design of three-phase hydrocyclone structure.
Authors: J.M.F. Façanha, D.O. Silva, M.A.S. Barrozo, Luiz Gustavo Martins Vieira
Abstract: Hydrocyclones are devices used in solid-liquid, liquid-liquid, and solid-liquid gas separation process applied in several industry fields such as mining, food and petrochemical. With the rising need of diminishing energy consumption and enhancing process efficiency, modifications on these equipments have been proposed in order to elevate their performance. It can be found in literature optimized geometric relations for a hydrocyclone (designated CH11), aiming to conjugate low energy consumption and small cut size diameters. Hence, the purpose of this paper is to study the influence of filtration on CH depending on where the filtering wall is settled (cylindrical or conical part). The main experimental results suggest that the placement of the permeable region (conical or cylindrical parts) influenced the performance of the equipment regarding the main variables. In conclusion, setting a filtering wall brought expressive changes for the separation process.
Authors: J.M.R. de Figueirêdo, P.L. de Oliveira, L.N.L. Santana, Romualdo Rodrigues Menezes, Gelmires Araújo Neves, Heber Carlos Ferreira
Abstract: Kaolin is a white clay, formed by hydrated aluminum silicates, which has several industrial applications. Since it is associated to impurities and presents considerable contents of contaminant elements that interfere in its performance and in its applications, kaolin must pass through a beneficiation process in order to meet the market's demands. The purpose of this work is to study the use of a hydrocyclone in the beneficiation of primary kaolins from Província Pegmatítica da Borborema. The samples were characterized by cation-exchange capacity (CEC), granulometric analysis by laser diffraction (GA), chemical composition by X-ray fluorescence (EDX), X-ray diffraction (DRX), differential thermal analysis (DTA) and thermogravimetric analysis (TG). The purification process did not show good results for kaolin in ABNT 200 mesh in the attempt to obtain colloidal kaolin. On the other hand, it presented very promising results for the beneficiation of raw kaolin, proving the feasibility of the application of this technology to the granulometric classification of this mineral, being an alternative route for the processes adopted in the regional kaolin beneficiation plants, which use washing and sieving.
Authors: Ding Feng, Si Huang, Li Luo, Wei Guo Ma
Abstract: This paper presents a performance analysis of a solid-liquid hydrocyclone using Ansys-CFX software. Based on the simulation, the influence of particle volume fraction of feed flow, mean diameter of particles and viscosity of liquid phase on the two-phase flow and separating performance has been investigated for optimizing design.
Authors: Isabele Cristina Bicalho, José Lucas Mognon, Juliana Shimoyama, Carlos Henrique Ataíde, Claudio Roberto Duarte
Abstract: Although the construction, maintenance and operation of hydrocyclones is simple in nature, it is known that the hydrodynamic behavior inside hydrocyclones is quite complex. Among the features which confer this complexity stands out: high vorticity preservation, vortex breakdown, flow inversion, and the possibility of formation of air core due to the generation of a low pressure area in the central axis of the separator. In this sense this work aimed to study the hydrodynamics of a hydrocyclone using as tool the Computational Fluid Dynamics (CFD). The simulated results were obtained considering two different models for turbulence: Reynolds stress model and Large Eddy simulation methodology. Can be highlighted as main simulated variables the flow ratio and the pressure drop of the hydrocyclone, which were compared with experimental values. In order to evaluate the influence of air core on the simulated variables, were done numerical simulations of the hydrocyclone operating in the presence of air core, using for this, the volume of fluid (VOF) model.
Authors: Si Huang, Yue Le, Luo Li
Abstract: This paper presents a numerical simulation and experimental study on a solid-liquid hydrocyclone. In the simulation, the standard k-ε turbulence model and the zero-equation model are employed to compute the flow field of the two phases in the hydrocyclone under different conditions, such as viscosity of the liquid, particle size and flow rate. In the experiment, a hydrocyclone is manufactured and measured for the separation efficiency and pressure drop in the test system. The simulation result of hydrocyclone performance matches well with the experimental data.
Authors: Ruo Feng Song, Yong Teng Yang, Lei Zhao, Fang Fang
Abstract: Hydrocyclone has been increasingly used in mineral, food and chemical industrial processes as common solid-liquid separation equipment. Small-sized hydrocyclone is generally applied to separate fine particle which is hard to separate by conventional sized hydrocyclone. However, the separation efficiency could be reduced due to the limitations of inlet width and capacity in this case. A novel impeller hydrocyclone is designed to solve this problem, and the influences of impeller on inner fluid flow rate have been discussed by simulating fluid flow patterns using a common CFD software, FLUENT. The results show that increasing the speed of rotating blade section is an effective way to improve the particle separation efficiency due to the increase in centrifugal force.
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