Oil-water separation using hydrocyclones: An experimental search for optimum dimensions

Young, G.A.; Wakley, W.D.; Taggart, Davis L.; Andrews, Stacey; Worrell, Julian

doi:10.1016/0920-4105(94)90061-2

Cited by 108 publications

(61 citation statements)

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“…For a given underflow backpressure, if the overflow pressure is slowly increased, the core diameter increases, ultimately resulting in part of the oil core discharging out through the underflow. The MQ Hydroswirl performance is independent of the underflow pressure, as shown in Figure 3.6, provided there is sufficient backpressure to force enough flow out of the overflow (Young et al 1990). It is critical that constant back pressure be applied, since swings in backpressure result in the oil in the core being rapidly discharged with the cleaned water.…”

Section: 2 Effect Of Underflow Pressurementioning

confidence: 97%

“…It is critical that constant back pressure be applied, since swings in backpressure result in the oil in the core being rapidly discharged with the cleaned water. Separation efficiency of LLHCs is independent of overflow diameter (Young et al 1990). This is confirmed by the results of this study, as shown in Figure 3.7.…”

Section: 2 Effect Of Underflow Pressurementioning

confidence: 99%

“…Efficiencies higher than 90% were reported. Young et al (1990) measured the flow behavior in a 35-mm hydrocyclone, designed by , and compared the results with a new modified design developed by them. They studied the effects of operational variables and geometrical parameters, such as inlet size, cylindrical diameter, cone angle, straight section length, flow rate, and droplet diameter on the separation efficiency.…”

Section: Experimental Studiesmentioning

confidence: 99%

“…The minimum flow rate for each orifice opening size is a result of a minimum velocity required for the oil to move to the overflow (Young et al 1990). This minimum velocity multiplied by the cross sectional area of the overflow results in a minimum flow rate for effective separation for each overflow opening size.…”

Section: 2 Effect Of Underflow Pressurementioning

confidence: 99%

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Oil-Water Separation in Liquid-Liquid Hydrocyclones (LLHC)–Experiment and Modeling

Gómez

Caldentey

Wang

et al. 2001

SPE Annual Technical Conference and Exhibition

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The data reveal that LLHCs can be used up to 10% oil concentrations at the inlet, maintaining high separation efficiency. However, the performance of the LLHC is best for very low oil concentrations at the inlet, below 1%. For low concentrations, no emulsification of the mixture occurs in the LLHC. However, high inlet concentrations, up to 10%, promote emulsification posing a separation problem in the overflow stream.An existing LLHC mechanistic model is modified and refined. The main modifications carried out are improved correlation for the swirl intensity that affects the axial and tangential velocity distributions, the flow reversal radius and the inlet factor.The required inputs for the model are: LLHC geometry, fluid properties, inlet droplet size distribution and operational conditions. The model is capable of predicting the LLHC hydrodynamic flow field, namely, the swirl intensity and the axial, tangential and radial velocity distributions of the continuous-phase. The separation efficiency and migration probability are determined based on droplet trajectory analysis. The flow capacity, namely, the inlet-to-underflow pressure drop, is predicted utilizing an energy balance analysis.The LLHC mechanistic model was tested against the present study data and additional data from the literature, especially from . Very good agreement is observed between the model predictions and the experimental data with respect to the swirl intensity, axial and tangential velocity distributions, migration probability and global separation efficiency. The developed LLHC model can be used for the design of field applications for the industry. v ACKNOWLEDGEMENTS

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Section: 2 Effect Of Underflow Pressurementioning

confidence: 97%

Section: 2 Effect Of Underflow Pressurementioning

confidence: 99%

Section: Experimental Studiesmentioning

confidence: 99%

Section: 2 Effect Of Underflow Pressurementioning

confidence: 99%

See 2 more Smart Citations

Oil-Water Separation in Liquid-Liquid Hydrocyclones (LLHC)–Experiment and Modeling

Gómez

Caldentey

Wang

et al. 2001

SPE Annual Technical Conference and Exhibition

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show abstract

“…Oil and gas should be as pure as possible to match the international standards for hydrocarbons commercialization. 1 The separation process is done by means of large settling devices among which batteries of spheroids are placed downstream of low pressure LP separators. The piping network connecting the spheroids to the LP separators causes a mal-distribution of the crude within each pair of spheroids leading to an overloading of one of the spheroids and an under-loading of the other.…”

Section: Introductionmentioning

confidence: 99%

Effects of Geometry, Temperature, and Inlet Conditions on the Flow Split in Spheroids Manifold

Kharoua¹,

Khezzar²

2016

IPCSE

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Miniaturization of Hydrocyclones by High‐Resolution 3D Printing for Rapid Microparticle Separation

Han

Krasniqi

Kim

et al. 2020

Adv Materials Technologies

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principles of operation. [10][11][12] However, the effective separation of micron-scale components from biological matrices using these conventional techniques is often constrained by low throughput, biofouling, and incompatibility with the need for continuous and automated processing. [3,6,7,9] In addition, biological particles such as cells are often susceptible to damage or degradation due to the application of high forces during centrifugal or membrane based separations, presenting a further obstacle to achieving time-and cost-effective isolation of biological targets. [3,[13][14][15][16][17][18] Microfluidic-based separations based on both active and passive techniques have been investigated as promising approaches to continuous-flow isolation of micron-scale particles from fluid suspensions. Active separation methods utilize external forces including electric, [19] magnetic, [20] and acoustic forces, [21] whereas passive separation methods utilize hydrodynamic forces induced by microstructure-fluid interactions and fluid dynamic phenomena. [22][23][24] Passive separations are particularly attractive as they do not require external actuation beyond the application of bulk fluid flow through the system, thereby minimizing instrumentation requirements and system complexity. Microfluidic filtration is a straightforward strategy for particle separation utilizing sizebased retention, with an integrated membrane, micropillar array, or other porous structure able to selectively pass particles smaller than the pore size while retaining other larger particles. [25][26][27] However, as with its macroscale counterpart, filtration presents inherent challenges when handling large sample volumes, including membrane biofouling, limited throughput, high pressure requirements, and limited scaling. [26,[28][29][30] While passive hydrodynamic separation techniques such as inertial focusing, [24,31] deterministic lateral displacement, [32,33] pinched flow fractionation, [34] and Dean flow focusing [22,35,36] can overcome these constraints and are well suited to continuous flow operation, throughput remains fundamentally limited since relatively low Reynolds number flows must be employed in these systems to maintain force balance during microfluidic separations. [23,30,37] At the macroscale, hydrocyclone technology has evolved as a powerful and simple solid-liquid separation technology traditionally used in large-volume industrial processes including mineral dewatering [38,39] and desliming, [40] heavy metal recovery, [41,42] and water treatment. [43][44][45] Hydrocyclones enable Hydrocyclones are a simple and powerful particle separation technology, widely used in macroscale industrial processes, with enormous potential for miniaturization. Although recent efforts to shrink hydrocyclones to the centimeter scale have shown great promise for passive and high-throughput microparticle separations, further miniaturization is constrained by limited understanding of the impact of device size scale and design on separation performance,...

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Oil-water separation using hydrocyclones: An experimental search for optimum dimensions

Cited by 108 publications

References 0 publications

Oil-Water Separation in Liquid-Liquid Hydrocyclones (LLHC)–Experiment and Modeling

Oil-Water Separation in Liquid-Liquid Hydrocyclones (LLHC)–Experiment and Modeling

Effects of Geometry, Temperature, and Inlet Conditions on the Flow Split in Spheroids Manifold

Miniaturization of Hydrocyclones by High‐Resolution 3D Printing for Rapid Microparticle Separation

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