An experimental study of flow distribution and separation performance in a UU-type mini-hydrocyclone group

Lv, Wenjie; Huang, Cong; Chen, Jianqi; Liu, Honglai; Wang, Hualin

doi:10.1016/j.seppur.2015.06.028

Cited by 30 publications

(8 citation statements)

References 32 publications

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“…1c), dual cone (Fig. 1b), and mini hydrocyclones with various shapes and angles of conical swirl chamber (Thew, 2000;Young et al 1994;Belaidi and Thew, 2003;Colman and Thew, 1988;Kharoua et al 2010a;Lv et al 2015;Zhu et al 2012). Young et al (1994) and Saidi et al (2013) observed in a single cone hydrocyclone that a cone angle of 6 degree provides a better separation over a wide range of inlet conditions.…”

Section: Introductionmentioning

confidence: 94%

Design of liquid–liquid separation hydrocyclones using parabolic and hyperbolic swirl chambers for efficiency enhancement

Motin

Bénard

2017

Chemical Engineering Research and Design

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The wall profile of the swirl chamber greatly impacts the internal flow structures and separation efficiency of a liquid-liquid separation hydrocyclone. The objective of this study is to examine the effects of parabolic and hyperbolic wall profiles of hydrocyclone swirl chamber on the internal flow structures and separation efficiency based on the numerical simulations. The internal flow structures observed for the different wall profiles of swirl chamber motivates the redesign of hydrocyclone geometry to achieve enhanced separation efficiency. Results show that, for a dilute system (oil concentration less than 1%), the hyperbolic and parabolic swirl chambers without a tail pipe yield, respectively, 16.5% and 25% higher separation efficiency for a droplet size of 30 μm when compared with a conical swirl chamber without tail pipe. However, the hyperbolic swirl chamber has a greater potential for the reduction of effective length of hydrocyclone with maintaining high separation efficiency. In addition, a hydrocyclone with truncated hyperbolic swirl chamber and tail pipe provides very long reverse flow core and yields 17% and 33% higher efficiency than that of full hyperbolic and conical swirl chambers without tail pipe, respectively.

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Section: Introductionmentioning

confidence: 94%

Design of liquid–liquid separation hydrocyclones using parabolic and hyperbolic swirl chambers for efficiency enhancement

Motin

Bénard

2017

Chemical Engineering Research and Design

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“…Compared to increasing the size of the equipment to stay level with demand, the numbering-up approach significantly decreases gas–liquid contacting time. In addition, the setup used in conjunction with a single gas–liquid mixer is the same as that used in the case of the distributor, the similarity of the (flow field) physical process is only a quantitative change with no qualitative change, and the individual performance does not change as the number increases. − The parallel amplification can be transformed into a multichannel fluid distribution problem. However, there is a lack of uniform flow in mixer configurations, which leads to pressure fluctuations in the underflow, and, thus, gas–liquid contacting efficiency can be affected .…”

Section: Introductionmentioning

confidence: 99%

Gas–Liquid Swirling-Sparger Configured along a Toroidal Distributor for the Intensification of Gas–Liquid Contacting

Chang

et al. 2021

Ind. Eng. Chem. Res.

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A gas–liquid swirling-sparger (GLSS) configured along a toroidal distributor was developed based on swirling flow to enhance the efficiency of gas–liquid contacting. Gas–liquid contacting was visualized using a high-speed camera, the gas–liquid mass transfer coefficient was estimated through oxygen absorption experiments, and the hydrodynamic performance and bubble size distribution were analyzed. The results show that the continuous gas phase breaks into microbubbles under shearing action and pressure fluctuation caused by the three-dimensional strong turbulent flow in the GLSS; the bubble diameter distribution was unimodal with a median diameter (d 50) of 625 μm, and the oxygen absorption efficiency of the GLSS exceeded 70%. A general discrete model was developed for evaluating flow uniformity in parallel multiple GLSSs along a toroidal distributor. The experimental results were in good agreement with the theoretical calculations. The study is important for optimizing the use of gas–liquid contactors in engineering applications.

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“…The hydrocyclone has been widely used as a classification and separation device in grinding-classification operations. However, hydrocyclone classification can result in "fish-hook" (fine particle entrainment in underflow) and coarse particles in overflow, a phenomenon known as derichment [1][2][3][4]. In the classification of high-concentration coarse-grained materials, the "fish-hook" depends on the settling velocity of multi-component particles in a swirling flow field.…”

Section: Introductionmentioning

confidence: 99%

Effect of Overflow Pipe on the Internal Flow Fields and Separation Performance of W-Shaped Hydrocyclones

et al. 2020

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The entrainment of fine particles in underflow of a grinding-classification hydrocyclone can cause ore overgrinding, which will lead to reductions in both metal recovery and ball mill throughput. To address this problem, this paper proposed a W-shaped hydrocyclone that can effectively reduce underflow fine particle entrainment. Experimental tests and numerical simulations were employed to deeply investigate overflow pipe diameter influence on the separation performance and internal flow field of W-shaped hydrocyclones. The effects of overflow pipe diameter on air core shape, velocity field, pressure field, and separation performance were studied. The results revealed that as the diameter of the overflow pipe increased, air core gradually stabilized, and air core diameter gradually increased. The diameter of stabilized air core was approximately 45% to 55% of overflow pipe diameter. As overflow pipe diameter increased, hydrocyclone pressure drop decreased, energy consumption was reduced, the tangential velocity decreased, outer vortex axial velocity did not change significantly, and inner vortex axial velocity gradually increased. At the same time, zero-velocity points gradually moved outward, and the inner vortex region expanded. By the increase of overflow pipe diameter, both the underflow yield and split ratio gradually decreased, the coarse particle content in the overflow product increased, and the fine particle content in the underflow product gradually decreased.

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An experimental study of flow distribution and separation performance in a UU-type mini-hydrocyclone group

Cited by 30 publications

References 32 publications

Design of liquid–liquid separation hydrocyclones using parabolic and hyperbolic swirl chambers for efficiency enhancement

Design of liquid–liquid separation hydrocyclones using parabolic and hyperbolic swirl chambers for efficiency enhancement

Gas–Liquid Swirling-Sparger Configured along a Toroidal Distributor for the Intensification of Gas–Liquid Contacting

Effect of Overflow Pipe on the Internal Flow Fields and Separation Performance of W-Shaped Hydrocyclones

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