In depth characterisation of hydrocyclones: Ascertaining the effect of geometry and operating conditions on their performance

Izquierdo, Javier; Sukunza, Xabier; Espinazo, Paula; Vicente, Jorge; Aguado, Roberto; Olazar, Martı́n

doi:10.1016/j.apt.2023.104025

Cited by 4 publications

(2 citation statements)

References 49 publications

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“…As observed, the mass concentration of carboxymethyl cellulose ( C CMC ) varied from 0.20 to 0.60%, while the feed mass concentration of solids ( C WA ) increased from 3.00 to 9.50%. These proposed concentration values are within the range of mass content of commonly used suspensions encountered in petrochemical industries. ,, Equations and present the codification of C CMC and C WA , respectively. X 1 = C normalC normalM normalC false[ % false] − 0.40 0.20 X 2 = C normalW normalA 0.25em [ % ] − 6.25 3.25 where X 1 is the coded variable related to C CMC (mass concentration of carboxymethyl cellulose) and X 2 is the coded variable related to C WA (feed mass concentration of solids).…”

Section: Methodsmentioning

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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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%

Study on Filtering Hydrocyclones Operating with Concentrated Non-Newtonian Suspensions

Morimoto,

Gonçalves,

Barrozo

et al. 2023

Ind. Eng. Chem. Res.

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“…To alleviate fine particle misplacement in underflow and improve hydrocyclone separation efficiency, scholars have conducted much research on structures and operating parameters [10][11][12]. Cui et al [13] reported that a proper increase in feed flux could contribute to the stabilization of flow fields, reduce particle misalignment in export products, and increase the adaptability to fluctuations in feed size.…”

Section: Introductionmentioning

confidence: 99%

Designing the Spigot Structure of Hydrocyclones to Reduce Fine Particle Misplacement in Underflow

Liu,

Chen,

Hou

et al. 2024

Water

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Hydrocyclones can be used to concentrate the entrained sands in sewage and alleviate the clogging and erosion of the drainage network, but in practical application, there are problems such as low concentrations of underflow and a high content of fine particles, which cause a significant load on the subsequent sand dewatering and recycling. This paper designs five spigot structures of hydrocyclones and investigates the separation performance by numerical simulation, aiming to improve the applicability of hydrocyclones in the sewage treatment process by optimizing the spigot structure. The research results show that a large cone spigot delays the external downward swirling flow and reduces fine particle content in the underflow, but its effective separation space is reduced, and the turbulence in the cone section area is more intensive, which influences the separation accuracy. An elongated spigot has a reduced underflow water distribution; fine particles are more enriched in the internal swirling flow, and the underflow recoveries of 1 μm and 5 μm particles drop by 2.34% and 2.31%. The spigot structure affects the downward fluid and air intake states; complicated spigot structures contribute to increasing the resistance of particle discharge through underflow, alleviating fine particle misplacement.

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Design strategies for miniaturised liquid–liquid separators — A critical review

Bu,

Mesa,

Brito-Parada

2024

Chemical Engineering Journal

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In depth characterisation of hydrocyclones: Ascertaining the effect of geometry and operating conditions on their performance

Cited by 4 publications

References 49 publications

Study on Filtering Hydrocyclones Operating with Concentrated Non-Newtonian Suspensions

Study on Filtering Hydrocyclones Operating with Concentrated Non-Newtonian Suspensions

Designing the Spigot Structure of Hydrocyclones to Reduce Fine Particle Misplacement in Underflow

Design strategies for miniaturised liquid–liquid separators — A critical review

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