Hydrocyclones: A Solution to Produced Water Treatment

Meldrum, N.

doi:10.4043/5594-ms

Cited by 31 publications

(10 citation statements)

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“…The liquid-liquid separation hydrocyclones are widely used in various industries for removing dispersed oil (oil concentration less than 1%) from produced water, oil spill and oily wastewater (Motin, 2015a(Motin, , 2015bLiu et al, 2015;Motin et al 2014aMotin et al , 2014bMotin et al , 2013. Hydrocyclones separate two phases of dissimilar densities based on the centrifugal force differential between the two phases created by strong swirling motion (Motin, 2015a(Motin, , 2015bLiu et al, 2015;Motin et al 2014aMotin et al , 2014bMotin et al , 2013Bradley, 1965;Svarovsky and Thew, 1992;Meldrum, 1988;Colman, 1981;Bai et al 2009;Petty and Parks, 2011;Slack et al 2000). The geometry of a hydrocyclone typically consists of an inlet chamber, a swirl chamber, a vortex finder, and a tail pipe (Fig.…”

Section: Introductionmentioning

confidence: 99%

“…1). The swirling motion developed by a tangential feed into the inlet chamber creates an axial pressure gradient at the core, which thereby provides a driving force for a reverse flow core to be developed (Motin, 2015a;Motin et al 2014a;Bradley, 1965;Svarovsky and Thew, 1992;Meldrum, 1988;Colman, 1981). The reverse flow core moves the oil rich core to the overflow orifice.…”

Section: Introductionmentioning

confidence: 99%

“…One of the major challenges in the liquid-liquid separation hydrocyclone is maintaining a long reverse flow core for a wide range of feed flow rate (Motin, 2015a). Recent studies performed on single cone hydrocyclones demonstrate that the conventional design (conical swirl chamber) is lacking in maintaining a long reverse flow core, and possesses a finite turndown ratio (Motin, 2015a, Meldrum, 1988Bennett and Williams, 2004;Motin et al 2014c). A high cone angle generates severe pressure drop along the axis and breakdowns the reverse flow core (Motin, 2015a;Motin et al 2014d).…”

Section: Introductionmentioning

confidence: 99%

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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: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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 analysis of complex swirl fluid flow through the liquid-liquid hydrocyclone (LLHC) was studied theoretically and experimentally [1][2][3]. Due to the fact that the exploration of new designs is time-consuming and costly to do by experimentation, several attempts have been made to simulate the solid-liquid hydrocyclone (SLHC) with CFD techniques for different geometries and some CFD simulations of deoiling hydrocyclones have been reported.…”

Section: Introductionmentioning

confidence: 99%

CFD Simulation of Inlet Design Effect on Deoiling Hydrocyclone Separation Efficiency

Noroozi

Hashemabadi

2009

Chem Eng & Technol

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An Eulerian-Eulerian three-dimensional CFD model was developed to study the effect of different inlet designs on deoiling hydrocyclone separation efficiency. Reynolds averaged Navier Stokes and continuity equations were applied to solve steady turbulent flow through the cyclone with the Reynolds stress model. In addition, the modified drag correlation for liquid-liquid emulsion with respect to the Reynolds number range and viscosity ratio of two phases was used and the simulation results were compared with those predicted by the Schiller-Naumann correlation. Pressure profile, tangential and axial velocities and separation efficiency of the deoiling hydrocyclone were calculated for four different inlet designs and compared with the standard design. The simulation results for the standard design demonstrate an acceptable agreement with reported experimental data. The results show that all new four inlet designs offer higher efficiencies compared to the standard design. The difference between the efficiency of the LLHC, of the new inlets and the standard design can be improved by increasing the inlet velocity. Furthermore, the simulations show that the separation efficiency can be improved by about 10 % when using a helical form of inlet.

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“…Hydro-swirl performance is independent of flow rate. [7] (e) The density difference. This is the biggest driving force for the separation.…”

Section: The Performance Factors Of the Cyclonesmentioning

confidence: 99%

The study of down-hole hydro-cyclone efficiency in oil wells using computational fluid dynamics

Yusuf¹

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Water is by far the largest waste stream associated with oil and gas production and it is unimaginable to find an oil reservoir absolutely free from connate water. Water management has become an important issue of hydrocarbon production, since the produced water increases as the field grows older and the cost of water handling, such as separation, treatment and repair is dramatically increasing. Down-Hole Separation (DOWS) and re-injection results in the production of oil to the surface, while portions of water are injected to the underground formation without ever being lifted to the surface DOWS depends on geological characteristics of the producing and injection formation, down-hole conditions, well configuration and equipment, installation procedures, hydrocyclone arrangement and water disposal. With their compact size, Liquid-Liquid Hydro-Cyclones (LLHC) can perform as an integral part of a down-hole oil water separation system. Despite performance and functionality of cyclones not being fully understood, they have created new possibilities for separating fluid down-hole for the producing formation and injecting separated water far away from the production interval. Before placing cyclones into practice, a study of fluid properties, well geometry, and characteristics of the formation can yield valuable information about the applicability and efficiency of DOWS. In this study, Computational Fluid Dynamic (CFD) was used to determine the effect of changes in API oil gravity, flow rates and cyclone geometry in order to understand the behaviour of LLHC in down-hole conditions. CFD is a tool that can predict the quantity of oil flow into surface, the quality of injected water into formation, split ratio, separation efficiency, mass transfer and related phenomena by solving numerically set of governing equations defining the fluid behavior in a DOWS.

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Hydrocyclones: A Solution to Produced Water Treatment

Cited by 31 publications

References 0 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

CFD Simulation of Inlet Design Effect on Deoiling Hydrocyclone Separation Efficiency

The study of down-hole hydro-cyclone efficiency in oil wells using computational fluid dynamics

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