Numerical study on the relationship between high sharpness and configurations of the vortex finder of a hydrocyclone by central composite design

Bo, Tang; Xu, Yanxia; Song, Xingfu; Sun, Ze; Yu, Jianguo

doi:10.1016/j.cej.2014.11.022

Cited by 82 publications

(44 citation statements)

References 31 publications

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“…Silva et al [7] developed an innovative geometrical configuration of hydrocyclones by means of the response surface technique, combined with an optimization algorithm and supported by a computational fluid dynamics complementary study. Tang et al [10] presented a numerical study of the effects of the configurations of vortex finder on the separation sharpness of a hydrocyclone. Hwang et al [13] evaluated the effects of inlet size, number of inlets and top-plate types on the particle separation efficiency and cut-size sharpness of hydrocyclones for improving fine particle separation using computational fluid dynamics.…”

Section: Computational Fluid Dynamics (Cfd) Is An Important Chemical mentioning

confidence: 99%

Effect of Inlet Diameter on the Performance of a Filtering Hydrocyclone Separator

2016

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Hydrocyclones are separators used in several industry fields, such as mining, food and petrochemical. Our research group designed a new hydrocyclone, in which a conical filtering wall replaces the conical section, producing another liquid stream leaving the equipment, besides underflow and overflow streams. In the present work, the influence of inlet diameter (Di) of a filtering hydrocyclone was analyzed by an experimental and CFD study. Data from conventional hydrocyclones of the same configurations were also obtained. Under the same operating conditions and geometry, the filtering hydrocyclone presented a better performance than the conventional device. Under the experimental conditions evaluated, an increase in inlet diameter by a factor of 2.2 reduces the Euler number by 84%. Keywords: Hydrocyclones, solid-liquid separation, unit operations IntroductionHydrocyclones are very simple devices, that consist of a conical section, open at its apex (underflow), joined to a cylindrical section, which has a tangential feed inlet [1]. The top of the cylindrical section is closed with a plate with an axially mounted overflow pipe. Despite the apparent simplicity, hydrocyclones are very efficient to promote solid-liquid and liquid-liquid separations. These devices convert pressure generated by a centrifugal pump into centrifugal force, causing suspended solids in the mud to be separated from the fluid. This separation is actually accelerated settling due to the increased gravitational force cause by the centrifugal action inside the cone. The action inside the hydrocyclone can multiply gravitational force by as much as 200 times [2].Application of hydrocyclone for particles separation is widespread due to advantages such as low cost, simple structure, large capacity and low volume [3]. Despite its simplicity, the flow behavior in a hydrocyclone is quite complex. The internal flow in these devices is totally turbulent and presents high vorticity preservation, vortex breakdown, flow inversion, air core etc. However, advances in computational technology, over recent years, have led to models based on fundamental fluid flow to predict the performance of the equipment. Computational Fluid Dynamics (CFD) is an important www.cet-journal.com Page 2 Chemical Engineering & TechnologyThis article is protected by copyright. All rights reserved.technique to study the fluid dynamics of many physical systems and it has been used widely in several engineering applications [4,5], including modelling flow in hydrocyclones [6][7][8][9][10][11][12][13][14][15].The literature presents some classic designs of hydrocyclones (also called families), in which the main design variable is the cylindrical diameter (Dc), and the other geometric dimensions are related to this one. The use of a certain family of hydrocyclones is generally restricted to the demand for a specific application [16].For improving the performance of hydrocyclones, many modifications in the conventional configurations of this device have been proposed in the literatur...

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Section: Computational Fluid Dynamics (Cfd) Is An Important Chemical mentioning

confidence: 99%

Effect of Inlet Diameter on the Performance of a Filtering Hydrocyclone Separator

2016

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“…11 The relationship between a high sharpness and the configurations of the vortex finder of a hydrocyclone was modeled using the regression method. 12 The production of recycled titanium from acid with the high sharpness was achieved.…”

Section: Introductionmentioning

confidence: 99%

Central composite design on the volume of laser metal deposited Ti6Al4V and Cu

Erinosho¹,

Akinlabi²

2017

Mater. Tehnol.

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The laser technology process is a pulsating practice in the field of engineering and in all paces of lifespan; since it can travel a longer distance and be focused on a very small bright spot that exceeds the illumination of the sun. This present study reports on the modeling and the prediction of the volume of laser-deposited composites using the central composite design (CCD). Four input factors were put into consideration, which is the laser power, the scanning speed, the powder flow rate and the gas flow rate. Titanium alloy (Ti6Al4V) and copper (Cu) powders were coaxially deposited to form the bulk of a single clad. The factors considered determine the energy density and the melt pool delivered into the substrate and as such, influence the volume of the deposited composite (VDC) that was employed in the response surface methodology (RSM) design. This has been used to predict the actual process parameters for the optimum process setting. Keywords: laser metal deposition, response surface methodology, central composite design, volume of deposited composite Postopek laserske tehnologije se uporablja na podro~ju tehnike in na vseh korakih`ivljenjske dobe materialov; saj lahko premaguje velike razdalje in je v obliki zelo majhne svelte to~ke, ki presega sevanje sonca. [tudija predstavlja modeliranje in napovedovanje koli~ine lasersko nane{enega kompozita, z uporabo centralnega na~rtovanja kompozita (angl. CCD). Obravnavani so bili {tirje vplivni dejavniki: mo~laserja, hitrost skeniranja, hitrost toka prahu in hitrost toka plina. Titanova zlitina (Ti6Al4V) in baker (Cu) sta bila koaksialno nane{ena in sta tvorila enoten nanos. Obravnavani dejavniki so dolo~ali gostoto energije in obseg taline nane{ene na podlago in kot taki vplivali na volumen nane{enega kompozita (angl. VDC), ki je bil uporabljen pri na~rtovanju metodologije odgovora povr{ine (angl. RSM). To je bilo uporabljeno za napovedovanje dejanskih procesnih parametrov pri optimiranju nastavitev procesa. Klju~ne besede: nana{anje kovine z laserjem, metodologija odgovora povr{ine, centralno na~rtovanje kompozita, volumen nane{enega kompozita

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“…Until recently, the hydrocyclone has been successfully and widely used in mineral industry [17], coal industry [18,19], chemical industry [20], environmental engineering [21], petroleum industry [22], pulp and paper industry [23], food industry [24], biological industry [25], agriculture [26], etc. Although the separation efficiencies, for materials with various different conditions, are significantly different, the separation performances of hydrocyclones in a number of specific industries are extremely outstanding.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of the separation performance of a novel sewage hydrocyclone used in sewage source heat pump

Tian

Shen

et al. 2016

Applied Thermal Engineering

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Numerical study on the relationship between high sharpness and configurations of the vortex finder of a hydrocyclone by central composite design

Cited by 82 publications

References 31 publications

Effect of Inlet Diameter on the Performance of a Filtering Hydrocyclone Separator

Effect of Inlet Diameter on the Performance of a Filtering Hydrocyclone Separator

Central composite design on the volume of laser metal deposited Ti6Al4V and Cu

Experimental study of the separation performance of a novel sewage hydrocyclone used in sewage source heat pump

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