Effect of drainage channel dimensions on the performance of wave-plate mist eliminators

Hamedi-Estakhrsar, M. H.; Rafee, Roohollah

doi:10.1007/s11814-013-0032-9

Cited by 20 publications

(10 citation statements)

References 14 publications

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“…Experimental [3,[6][7][8] and numerical studies [9][10][11] have been reported discussing how these factors influence the separator performance. Similar conclusions were acquired such as higher separation efficiency and pressure drop can be caused by increment of velocity and installation of drainage channel [12,13]; smaller plate pitch can lead to higher separation efficiency and pressure drop [14].…”

Section: Introductionsupporting

confidence: 71%

Performance analysis of plate-type vapor–liquid separators with groove used in marine desalination

Huang

Han

et al. 2018

J Braz. Soc. Mech. Sci. Eng.

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Taking vapor-liquid separators used in marine desalination as objects, a novel kind of plate-type vapor-liquid separator with groove is designed to achieve a more prominent separation effect. The Eulerian-Lagrangian approach is applied to simulate the two-phase flow in the separator. The SST j-x turbulence model is utilized to simulate the continuous phase, and discrete phase model (DPM) is employed to calculate the water droplet distribution and the corresponding trajectories, which is verified by the experimental results from the literature. The impacts from the groove height, width and depth on the separator performance are studied. Furthermore, to acquire the optimal geometry of the separators with groove, a dimensionless objective function considering the space size, separation efficiency and pressure drop is proposed, and the corresponding prediction model is established based on the response surface methodology. Compared to the traditional type, the computational fluid dynamic (CFD) simulation results show that a higher velocity and bigger circulation region contribute to a much more comprehensive performance in the proposed separator. After determining the optimal values for all the parameters, a discrepancy value of 5.2% between the simulation results and the prediction value is attained, which indicates that the prediction model is applicable to guide the design of the separator. Further study shows that the optimal novel separator guarantees the separation efficiency with much smaller size compared with the original one.

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Section: Introductionsupporting

confidence: 71%

Performance analysis of plate-type vapor–liquid separators with groove used in marine desalination

Huang

Han

et al. 2018

J Braz. Soc. Mech. Sci. Eng.

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show abstract

“…The value of C L is the eddy lifetime constant, and under different situations, this parameter has various values. Estakhrsar and Rafee [5] confirmed that simulation results are closer to the experiment results when the time scale constant of 0.15 is used.…”

Section: Continuous Phase Modelsupporting

confidence: 63%

“…Wilkinson, Banitabaei et al, Estakhrsar and Rafee, Kavousi et al, Zhao et al, Zamora and Kaiser, and Venkatesan et al all studied the optimization of wave‐plate structures. In their studies, the separation velocity was much less than the critical velocity of flooding or re‐entrainment, and the droplets were removed if they impinge on the surface.…”

Section: Introductionmentioning

confidence: 99%

Influence of droplet coalescence and breakup on the separation process in wave‐plate separators

Yuan

Fan

et al. 2018

Can J Chem Eng

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The purpose of this study is to investigate the numerical simulation method regarding the coalescence and breakup of droplets occurring during the gas‐liquid separation process and their influence on the separation efficiency and pressure drop. The Euler‐Lagrange method was used, and the discrete phase was simulated as an unsteady process. The results of the study indicate that numerical simulation results show better agreement with the experiment results when the coalescence and breakup model is taken into account. During the unsteady process, it was concluded that the simulation can meet the accuracy requirements as long as the Courant number of droplets is less than 1/3. The coalescence increases the droplet diameter, which improves the separation efficiency and reduces the pressure drop, whereas the opposite effect occurs with the breakup. Compared with other factors, the influence of the surface tension on the coalescence and breakup is more apparent, and droplets with a lower surface tension may be prone to coalescing or breaking. The coalescence occurs with a lower separation velocity, whereas breakup becomes predominant with higher separation velocity. The present research provides valuable suggestions on choosing strategies to improve the separation efficiency. For droplets with small surface tension, the separation velocity is restricted to not resulting breakup, and the separation efficiency can be improved by changing the shapes and spaces of the wave plate. In contrast, for droplets with large surface tension, increasing the velocity is an effective way to improve the separation efficiency.

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“…If the discrete random walk model is adopted, the characteristic eddy lifetime is defined by Equation for the k ‐ ε turbulence model and its variants. In Equation , C L is the eddy lifetime constant, and C L = 0.15 was recommended by ANSYS Fluent, which was also confirmed by Estakhrsar and Rafee 6 . For the k ‐ ω turbulence model and its variants, ε = 0.09 kω was substituted into Equation so that τ e was defined by Equation .…”

Section: Methodsmentioning

confidence: 99%

“…According to these assumptions, the factors influencing the separation efficiency including the geometry and distance of the channels, droplet diameters, physical properties of the gas and liquid, and velocities 3, 4 were studied experimentally and/or numerically. Zamora et al 5 Estakhrsar and Rafee, 6, 7 Kauousi, 8 Rafee et al 9 and Liu et al 10 studied the influence of the geometrical parameters, such as the bend number and angle, distance between the parallel plates, length between two successive bends, and drainage channels, on the separation performance of vane demisters. Wilkinson, 11 Koopman et al 12 and Banitabaei et al 13 studied the relationship between the separation efficiency and pressure drop for different the waveplate parameters.…”

Section: Introductionmentioning

confidence: 99%

Forming and stripping of the wall film and the influence on gas–liquid separation

Yuan

Fan

Chen

et al. 2020

Asia-Pacific J Chem Eng

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Effect of drainage channel dimensions on the performance of wave-plate mist eliminators

Cited by 20 publications

References 14 publications

Performance analysis of plate-type vapor–liquid separators with groove used in marine desalination

Performance analysis of plate-type vapor–liquid separators with groove used in marine desalination

Influence of droplet coalescence and breakup on the separation process in wave‐plate separators

Forming and stripping of the wall film and the influence on gas–liquid separation

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