The Experts below are selected from a list of 7656 Experts worldwide ranked by ideXlab platform
Hualin Wang - One of the best experts on this subject based on the ideXlab platform.
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experimental study of mini Hydrocyclones with different vortex finder depths using particle imaging velocimetry
Separation and Purification Technology, 2020Co-Authors: Fengqin He, Hualin Wang, Jianggang Wang, Shaofan Li, Xiao XuAbstract:Abstract Characterization of flow field inside the hydrocyclone is helpful in optimizing hydrocyclone structure design. In this work, flow patterns in a mini-hydrocyclone with various vortex finder depths were studied with Particle Image Velocimetry (PIV). Axial velocity and radial velocity distributions of the central plane orthogonal to the inlet of mini-hydrocyclone were acquired, streamline diagrams were constructed from the measured vectors, and calculated from the experimental data. An analysis of the experimental data shows that the structural parameters of Hydrocyclones have a critical impact on the flow field structure, and the experiment operation conditions only have an influence on strength of the flow fields. Vortex finder depth has a significant influence on the volume of the main separation zone and separation performance of mini-hydrocyclone. The optimal depth of the vortex finder was found to be a ratio of vortex finder depth to mini-hydrocyclone cylindrical section diameter L0/D of 1.0.
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pressure drop and flow distribution in a group of parallel Hydrocyclones z z type arrangement
Separation and Purification Technology, 2013Co-Authors: Hualin Wang, Cong Chen, Junye Wang, Cong HuangAbstract:Abstract The mini-hydrocyclone has received increasing attention due to its clear advantages of high efficiency, separating precision and relatively low cost. However, its handling capacity decreases as the nominal diameter of a hydrocyclone decreases. Therefore, a group of mini-Hydrocyclones are often employed to meet industrial handling capacity which imposes the difficulty of prediction, analysis, and design of such a group of the mini-hydrocyclone system. There is no theoretical model to evaluate design and operation of the system. The objective of this paper is to develop a general theoretical model to evaluate the flow distribution and the pressure drop in parallel mini-hydrocyclone groups with Z-Z-type arrangement. Detailed analytical solutions were obtained so that they can be easily used to predict the pressure drop and flow distribution under the different flow conditions and geometrical parameters. Furthermore, an experimental apparatus with 12 HL/S25-type mini-Hydrocyclones parallel in the Z-Z-type arrangement was set up to verify the model under different inlet pressures. It was found that the theoretical pressure drop and flow distribution were in good agreement with the experimental data. Meanwhile, with the combination of the different theoretical calculation cases, the percentage of relative error will be controlled within 1%. The present model also studied the influence of the split ratio on pressure drop and flow distribution since there were two exhaust headers. The uniformity of these distributions increased as the split ratio increased. This paper provided an easy-to-use design guidance to investigate the interactions among structures, operating conditions and manufacturing tolerance, in order to improve the performance of a parallel mini-hydrocyclone separator group.
Cong Chen - One of the best experts on this subject based on the ideXlab platform.
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pressure drop and flow distribution in a group of parallel Hydrocyclones z z type arrangement
Separation and Purification Technology, 2013Co-Authors: Hualin Wang, Cong Chen, Junye Wang, Cong HuangAbstract:Abstract The mini-hydrocyclone has received increasing attention due to its clear advantages of high efficiency, separating precision and relatively low cost. However, its handling capacity decreases as the nominal diameter of a hydrocyclone decreases. Therefore, a group of mini-Hydrocyclones are often employed to meet industrial handling capacity which imposes the difficulty of prediction, analysis, and design of such a group of the mini-hydrocyclone system. There is no theoretical model to evaluate design and operation of the system. The objective of this paper is to develop a general theoretical model to evaluate the flow distribution and the pressure drop in parallel mini-hydrocyclone groups with Z-Z-type arrangement. Detailed analytical solutions were obtained so that they can be easily used to predict the pressure drop and flow distribution under the different flow conditions and geometrical parameters. Furthermore, an experimental apparatus with 12 HL/S25-type mini-Hydrocyclones parallel in the Z-Z-type arrangement was set up to verify the model under different inlet pressures. It was found that the theoretical pressure drop and flow distribution were in good agreement with the experimental data. Meanwhile, with the combination of the different theoretical calculation cases, the percentage of relative error will be controlled within 1%. The present model also studied the influence of the split ratio on pressure drop and flow distribution since there were two exhaust headers. The uniformity of these distributions increased as the split ratio increased. This paper provided an easy-to-use design guidance to investigate the interactions among structures, operating conditions and manufacturing tolerance, in order to improve the performance of a parallel mini-hydrocyclone separator group.
Marcos Antonio Souza Barrozo - One of the best experts on this subject based on the ideXlab platform.
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Filtering cylindrical–conical hydrocyclone
Particuology, 2019Co-Authors: Fernanda Falqueto Salvador, Marcos Antonio Souza Barrozo, Luiz G.m. VieiraAbstract:Abstract Hydrocyclones have versatile applications in various industrial processes. They functionn on the principle of centrifugal separation to remove a dispersed phase (particles or drops) from a continuous phase (fluid). In unconventional filtering Hydrocyclones, the separation efficiency and energy costs have been improved by combining filtration with centrifugal separation. This work investigated experimentally the effect of incorporating a cylinder and a porous cone in a conventional hydrocyclone. It also evaluated the effects of the main geometric dimensions of the separator on the hydrocyclone performance. A differential-evolution algorithm was applied to optimize the hydrocyclone performance, which was represented as the maximum total efficiency and minimum Euler number. The experimental results validated the optimization results and showed that Hydrocyclones with optimized geometries exhibited higher total efficiencies (89.59%) and lower Euler numbers (582) than Hydrocyclones with other experimental configurations.
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Effect of a Cylindrical Permeable Wall on the Performance of Hydrocyclones
Chemical Engineering & Technology, 2016Co-Authors: Fernanda Falqueto Salvador, Marcos Antonio Souza Barrozo, Luiz G.m. VieiraAbstract:Hydrocyclones are designed for solid-liquid separation widely used in industry due to their advantages including high separation efficiency. Depending on the purpose desired by the user, it is possible to enhance the performance of the hydrocyclone through the combined use of other unit operations with the hydrocycloning such as filtration. The incorporation effect of a porous cylinder on a hydrocyclone with optimized geometry was studied experimentally. According to the main results, the filtering cylindrical hydrocyclone showed significant average reductions in energy consumption compared to conventional Hydrocyclones of the same geometry. Minor differences in terms of total efficiency of the filtering equipment were observed compared to the conventional one.
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Effects of underflow diameter and vortex finder length on the performance of a newly designed filtering hydrocyclone
Powder Technology, 2015Co-Authors: Nathacha Kare Gonçalves Silva, Luiz G.m. Vieira, Danylo O. Silva, Marcos Antonio Souza BarrozoAbstract:Abstract Hydrocyclones are versatile equipments used in several industrial processes. Many modifications have been proposed to alter the typical structure of the hydrocyclone separator in order to improve its performance for specific process objectives; therefore, the filtering hydrocyclone fits into the category of non-conventional equipment. The only difference between a filtering hydrocyclone and the typical one is that the former has a porous conical wall, which produces a filtrate stream of pure liquid. In this work an optimized geometry for a filtering hydrocyclone with maximum total efficiency was obtained by using the Differential Evolution (DE) algorithm. The effects of the underflow diameter (Du) and the vortex finder length (l) on this new hydrocyclone were experimentally analyzed. The best values for Du and l were found so as to provide the highest total efficiency.
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optimization of the design and performance of Hydrocyclones by differential evolution technique
Chemical Engineering and Processing, 2012Co-Authors: Danylo O. Silva, Luiz G.m. Vieira, F S Lobato, Marcos Antonio Souza BarrozoAbstract:Abstract Several geometries of the Hydrocyclones have been proposed in the literature to improve the separation efficiency or reduce the energy costs. In the present paper, a new geometrical configuration of hydrocyclone has been found through the use of response surface technique combined with the Differential Evolution algorithm. The result obtained with these optimization techniques has been validated by experimental data. The optimized configuration of hydrocyclone presented a high efficiency and a small reduced cut size.
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performance of Hydrocyclones with different geometries
Canadian Journal of Chemical Engineering, 2011Co-Authors: Luiz G.m. Vieira, João Jorge Ribeiro Damasceno, Beatriz Cristina Silverio, Marcos Antonio Souza BarrozoAbstract:Hydrocyclones belong to an important group of equipments designed to solid–liquid or liquid–liquid separation in a centrifugal field. It is possible to adapt a hydrocyclone to the accomplishment of several industrial activities depending on the geometrical relations among its main dimensions. The operation and design of these devices are relatively simple; however, the flow inside them is very complex and its prediction is very difficult. For that reason, most models that are used to predict hydrocyclone performance are empirical ones. The objective of this work was to study the influence of geometric variables in the performance of Hydrocyclones, using CFD and response surface techniques. The obtained results show that it was possible to find an optimum hydrocyclone design, that is, geometric relationships that lead to Euler number and cut size in minimum levels. Les hdrocyclones appartiennent a un groupe important d'equipements concus pour la separation solide-liquide ou liquide-liquide dans un champ centrifuge. Il est possible d'adapter un hydrocyclone a la realisation de plusieurs activites industrielles selon les relations geometriques dans ses dimensions principales. Le fonctionnement et la conception de ces dispositifs sont relativement simples; cependant, leur circulation interne est tres complexe et sa prediction est tres difficile. Pour cette raison, la plupart des modeles utilises pour predire le rendement des Hydrocyclones sont des modeles empiriques. L'objectif de ce travail etait d'etudier l'influence des variables geometriques sur le rendement des Hydrocyclones en utilisant une DFN et des techniques de surface de reponse. Les resultats obtenus indiquent qu'il etait possible de trouver une conception d'Hydrocyclones optimale, c.-a-d. les relations geometriques qui menent au nombre d'Euler et a la mesure fixe a des niveaux minimaux. © 2011 Canadian Society for Chemical Engineering
Junye Wang - One of the best experts on this subject based on the ideXlab platform.
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pressure drop and flow distribution in a group of parallel Hydrocyclones z z type arrangement
Separation and Purification Technology, 2013Co-Authors: Hualin Wang, Cong Chen, Junye Wang, Cong HuangAbstract:Abstract The mini-hydrocyclone has received increasing attention due to its clear advantages of high efficiency, separating precision and relatively low cost. However, its handling capacity decreases as the nominal diameter of a hydrocyclone decreases. Therefore, a group of mini-Hydrocyclones are often employed to meet industrial handling capacity which imposes the difficulty of prediction, analysis, and design of such a group of the mini-hydrocyclone system. There is no theoretical model to evaluate design and operation of the system. The objective of this paper is to develop a general theoretical model to evaluate the flow distribution and the pressure drop in parallel mini-hydrocyclone groups with Z-Z-type arrangement. Detailed analytical solutions were obtained so that they can be easily used to predict the pressure drop and flow distribution under the different flow conditions and geometrical parameters. Furthermore, an experimental apparatus with 12 HL/S25-type mini-Hydrocyclones parallel in the Z-Z-type arrangement was set up to verify the model under different inlet pressures. It was found that the theoretical pressure drop and flow distribution were in good agreement with the experimental data. Meanwhile, with the combination of the different theoretical calculation cases, the percentage of relative error will be controlled within 1%. The present model also studied the influence of the split ratio on pressure drop and flow distribution since there were two exhaust headers. The uniformity of these distributions increased as the split ratio increased. This paper provided an easy-to-use design guidance to investigate the interactions among structures, operating conditions and manufacturing tolerance, in order to improve the performance of a parallel mini-hydrocyclone separator group.
Fengqin He - One of the best experts on this subject based on the ideXlab platform.
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experimental study of mini Hydrocyclones with different vortex finder depths using particle imaging velocimetry
Separation and Purification Technology, 2020Co-Authors: Fengqin He, Hualin Wang, Jianggang Wang, Shaofan Li, Xiao XuAbstract:Abstract Characterization of flow field inside the hydrocyclone is helpful in optimizing hydrocyclone structure design. In this work, flow patterns in a mini-hydrocyclone with various vortex finder depths were studied with Particle Image Velocimetry (PIV). Axial velocity and radial velocity distributions of the central plane orthogonal to the inlet of mini-hydrocyclone were acquired, streamline diagrams were constructed from the measured vectors, and calculated from the experimental data. An analysis of the experimental data shows that the structural parameters of Hydrocyclones have a critical impact on the flow field structure, and the experiment operation conditions only have an influence on strength of the flow fields. Vortex finder depth has a significant influence on the volume of the main separation zone and separation performance of mini-hydrocyclone. The optimal depth of the vortex finder was found to be a ratio of vortex finder depth to mini-hydrocyclone cylindrical section diameter L0/D of 1.0.