Optimization study of thickener hydrocyclones

Ullmann, Grégori; Gonçalves, Suélen Mara; Kyriakidis, Yanne Novais; Barrozo, Marcos Antônio de Souza; Vieira, Luiz Gustavo Martins

doi:10.1016/j.mineng.2021.107066

Cited by 19 publications

(6 citation statements)

References 53 publications

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“…The operational success of a hydrocyclone depends on the relationship between its main dimensions. − Consequently, it is possible to manipulate or optimize the geometric variables of this device in order to meet the demands of a specific application. − In addition, its performance can also be improved by modifying its construction, creating the so-called nonconventional hydrocyclones. These new devices may have a parabolic shape instead of conical, − the structure of their vortex finder modified, − a solid rod inserted along their vertical axis, , and the number of feeds or design of the feed ducts changed. − …”

Section: Introductionmentioning

confidence: 99%

“…One goal of this study is to improve the understanding of the performance of an hydrocyclone whose geometric relationship was obtained in previous optimization works performed by our research group. These previous studies ,,,,, were conducted using aqueous diluted suspensions, and suspensions with more drastic conditions of rheology and concentration of solids are found in industrial processes . For instance, hydrocyclones are used to separate gravel from pseudoplastic drilling fluids; they are also used in offshore heavy oil desanding operations and in the classification of fines in grinding circuits for ore slurries of different concentrations, starch processing plants, and protein separation .…”

Section: Introductionmentioning

confidence: 99%

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Study on Filtering Hydrocyclones Operating with Concentrated Non-Newtonian Suspensions

Morimoto,

Gonçalves,

Barrozo

et al. 2023

Ind. Eng. Chem. Res.

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Hydrocyclones are devices used to separate a discrete phase (solid or liquid) from a continuous liquid phase. Although this partition process is simple and versatile, there are limitations when separating concentrated suspensions with high viscosity. By replacing the cylinder or cone walls of hydrocyclones by a permeable wall, our research group developed the so-called filtering hydrocyclones. Although previous studies have shown that filtering hydrocyclones have a better performance than conventional devices of the same geometry, they were performed with diluted Newtonian suspensions. Thus, the aim of the present work is to evaluate the performance of a filtering and a conventional hydrocyclone of the same geometry operating with concentrate suspensions with pseudoplastic rheological behavior. The geometric relationship of these hydrocyclones was obtained in a previous optimization study that aimed at maximizing overall efficiency in aqueous diluted suspensions; this high-efficiency device is known as MOEH. When operating a pseudoplastic fluid with a behavior index equal to 0.6536, there was a 48% decrease in the efficiency of the MOEH hydrocyclone. The MOEH experiments performed with a pseudoplastic suspension containing 9.5 wt % of solids and 0.6 wt % of carboxymethyl cellulose achieved an Euler number of 1108, a split ratio of 44%, and an overall efficiency of 47%. However, the average results demonstrated that the operation with the newly designed filtering hydrocyclone, called MOEH-CoF, led to an Euler number about 10% lower and an overall efficiency about 5% higher than that obtained with the conventional device. The findings of this study can lead to a better understanding of solid–liquid separation in the petrochemical, mineral, and food industries, which generally works with concentrated non-Newtonian fluids.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on Filtering Hydrocyclones Operating with Concentrated Non-Newtonian Suspensions

Morimoto,

Gonçalves,

Barrozo

et al. 2023

Ind. Eng. Chem. Res.

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“…That leads to works that use experiments, mathematics models, such as computational fluid dynamics (CFD), or both to perform these evaluations. [6][7][8][9] However, each application has its peculiarities that have motivated several studies to analyze possible modifications in the HC structure to enhance its performance, [10][11][12] which can be explored using CFD. [13] One possible modification is the introduction of a third outlet flow to the HC, resulting in a three-product cyclone (TPC), which can present one overflow and two underflows [14] or two overflows and one underflow.…”

Section: Introductionmentioning

confidence: 99%

Comparison between response surface methodology and artificial neural network: Application in three‐product hydrocyclones

et al. 2022

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Modelling a process or equipment is a profitable strategy to build better control strategies, predict fault conditions, and optimize the processes. Different approaches could be explored to achieve the development of better models. This paper investigates the use of experimental data generated by a central composite rotatable design (CCRD) to develop models capable of predicting the performance of a three‐product hydrocyclone for several setups with different dimensional parameters values. Two different modelling strategies are explored: response surface methodology (RSM) and artificial neural networks (ANN). With the RSM models, it was possible to evaluate the statistical importance of the input variables to each output variable. The ANN models showed improved coefficients of determinations (R2) compared to the RSM models, presenting values higher than 97% for all cases, while the RSM models ranged from 79.07%–88.83%. The ANN was demonstrated to be the most effective method to model the physical problem of three‐product hydrocyclones, and it captured its non‐linearities. It was shown that the combination of the design of experiments and ANN to analyze this physical problem is successful and may also be applied to other problems. As far as we have knowledge, a work regarding the comparison of both RSM and ANN methods applied to three‐product hydrocyclones was not found in the literature; this absence was the motivation for this work.

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“…São flexíveis quanto ao objetivo de separação, podem clarificar (Gonçalves et al 2020). ou concentrar correntes (Ullmann et al 2021) Em comparação a outros separadores, como centrifugas e filtros, possuem tamanho reduzido e ausência de partes móveis. Outras vantagens estão relacionadas a simplicidade operacional e ao baixo custo de manutenção e aquisição (Svarovsky, 2000).…”

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Análise do impacto da filtração sobre um hidrociclone concentrador de geometria otimizada / Analysis of the impact of filtration on a concentrator hydrocyclone of optimized geometry

Gonçalves¹,

Kyriakidis²,

Salvador³

et al. 2022

BJDV

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Optimization study of thickener hydrocyclones

Cited by 19 publications

References 53 publications

Study on Filtering Hydrocyclones Operating with Concentrated Non-Newtonian Suspensions

Study on Filtering Hydrocyclones Operating with Concentrated Non-Newtonian Suspensions

Comparison between response surface methodology and artificial neural network: Application in three‐product hydrocyclones

Análise do impacto da filtração sobre um hidrociclone concentrador de geometria otimizada / Analysis of the impact of filtration on a concentrator hydrocyclone of optimized geometry

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