Geometric optimization of filtering conical hydrocyclones for thickening purposes with low energy consumption

Faria, Érica Victor de; Salvador, Fernanda Falqueto; Ascendino, Guilherme Guimarães; Barrozo, Marcos Antônio de Souza; Vieira, Luiz Gustavo Martins

doi:10.1016/j.cherd.2021.12.011

Cited by 16 publications

(5 citation statements)

References 49 publications

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“…It is important to point out that once the clogging is done, the filter can operate for long periods without showing any deterioration in its physical properties. Also, it is valid to inform that due to the high tangential velocity of the slurry that shears the filtering wall of the device, there is no cake formation over the filtering medium. , …”

Section: Methodsmentioning

confidence: 99%

“…Also, it is valid to inform that due to the high tangential velocity of the slurry that shears the filtering wall of the device, there is no cake formation over the filtering medium. 43,64 2.3. Experimental Procedures.…”

Section: Particulate Materials and Viscosifiermentioning

confidence: 99%

“…It is acknowledged that the transport in a conduit adjacent to a porous medium is drastically influenced by the porous walls . Previous studies with diluted and Newtonian suspensions demonstrated that the filtering hydrocyclone has operational advantages over conventional hydrocyclones of the same geometry, , including higher processing capacity and overall efficiency, which can be attributed to changes in the fluid dynamics behavior. , It is known that the dispersion of Newtonian fluid in a conduit with porous walls is different for non-Newtonian fluid . To date, no studies have been carried out on filtering hydrocyclones operating with non-Newtonian fluids.…”

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: Methodsmentioning

confidence: 99%

Section: Particulate Materials and Viscosifiermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Study on Filtering Hydrocyclones Operating with Concentrated Non-Newtonian Suspensions

Morimoto,

Gonçalves,

Barrozo

et al. 2023

Ind. Eng. Chem. Res.

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“…The cone-plate cyclone clarifier has a simple structure, but the internal flow field contains an unpredictable inner and outside vortex flow, etc. The extremely complex flow field poses a serious challenge in predicting particle separation [20][21][22].…”

Section: Model Descriptionmentioning

confidence: 99%

Effect of Cone-Plate Radius on the Separation Performance of Cyclone Clarifier

Zhang,

Bai,

Xiao

et al. 2024

Water

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In order to further reduce the number of particles in the overflow port of a cyclone clarifier, a cone-plate structure with an equiproportionally varying cone-plate radius is proposed. This includes two structures, namely, an equal–proportional gradually shrinking cone-plate radius and an equal–proportional gradually expanding cone-plate radius. In this paper, numerical simulation is used to comparatively study the flow field characteristics and particle separation inside the traditional equal radius, the gradually shrinking radius, and the gradually expanding radius cone-plate cyclone clarifier. The simulation results show that compared with the traditional equal radius cone-plate structure, the gradual shrinking of the cone-plate structure, due to the bottom of the cone-plate radius being small, can better give full play to the cone-plate settling capacity. The gradually expanding cone-plate cyclone clarifier, due to the bottom of the cone-plate radius being large, results in more fine particles entering the overflow pipe and being discharged from the overflow port. Compared with the traditional cone-plate cyclone clarifier, the gradually shrinking cone-plate cyclone clarifier has a significant increase in the removal efficiency of particles of different sizes than the traditional cyclone clarifier overflow port. The removal efficiency of all particles at the overflow of the gradually shrinking cyclone clarifier was increased by 10.32% compared to the conventional cone-plate cyclone clarifier.

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“…Therefore, some studies using filtering hydrocyclones for solidliquid separation applied to the mineral sector have been reported in the literature. Among them, the works by Souza et al [11], Salvador et al [12], Vieira et al [13], Silva et al [14], Salvador et al [15], Vieira [16], and Farias [17] can be cited. In addition, we can mention the works of Wang and Wu [18] which studied a hydrocyclone with a filtering overflow pipe, to treat particulate slurry, and Lamskova et al [19], which investigated the classification capacity of the filtering hydrocyclone.…”

Section: Introductionmentioning

confidence: 99%

Impact of the Polarization Layer on the Hydrodynamics and Mechanical Performance of a Filtering Hydrocyclone Applied to Oily Water Separation

Nunes

Magalhães

Gomez

et al. 2022

DFMA

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The growing concern with the environment has driven the development of new technologies for the treatment of produced water. In this context, the filtering hydrocyclone appears as an interesting alternative for the treatment of these waters contaminated with oil from the petroleum industry. This research addresses the flow of fluids inside a hydrocyclone equipped with a porous wall (membrane) containing two tangential inlets and two concentric outlets, with the aim of study the impact of the formation of the polarization layer by concentration on the oily water separation process using CFD. Concentration fields and transmembrane pressure, concentration, and permeate flux profiles are presented and analyzed. The results show that the proposed filtering cyclonic separator concentrates the oil in the central region of the equipment, however, for high oil concentrations; the core expands and approaches the porous wall. Furthermore, the increase in the oil volume fraction causes a decline in the permeate flux, and an increase in feed velocity causes a decrease in the polarization layer.

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Geometric optimization of filtering conical hydrocyclones for thickening purposes with low energy consumption

Cited by 16 publications

References 49 publications

Study on Filtering Hydrocyclones Operating with Concentrated Non-Newtonian Suspensions

Study on Filtering Hydrocyclones Operating with Concentrated Non-Newtonian Suspensions

Effect of Cone-Plate Radius on the Separation Performance of Cyclone Clarifier

Impact of the Polarization Layer on the Hydrodynamics and Mechanical Performance of a Filtering Hydrocyclone Applied to Oily Water Separation

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