Impact of non-uniform surface roughness on the erosion rate and performance of a cyclone separator

Dehdarinejad, Ehsan; Bayareh, Morteza

doi:10.1016/j.ces.2021.117351

Cited by 30 publications

(10 citation statements)

References 28 publications

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“…49,57,86,158 In the investigated cyclones with one structure inlet, as shown in Figure 8, the tangential velocity distribution tends to be symmetric around the central vertical axis of St 1 , Sw 1 , and TL cyclones, which matches the literature. 159 The tangential velocity profile in the St 1 and TL cyclones extends to a lower region of the conic part, unlike the Sw 1 cyclone, indicating that particles will swirl in this region. In contrast, the St 2 and Sw 2 cyclones exhibit high velocity and eccentric circulation within the cylinder region, accelerating the flow to escape through the vortex finder.…”

Section: Gas−particle Flow Pattern 421 Gas Flow Analysismentioning

confidence: 90%

Modeling and Performance Analysis of Different Gas–Bioparticle Cyclone Separators: CFD–DEM Simulations

El-Emam,

Zhou,

Bai

et al. 2023

Ind. Eng. Chem. Res.

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This research presents a comprehensive study aimed at investigating the influence of different cyclone geometries on the flow field and performance in gas−bioparticle flows. Five distinct cyclone designs, including Stairmand high-efficiency (St 1 ), Stairmand high-flow (St 2 ), Swift high-efficiency (Sw 1 ), Swift highflow (Sw 2 ), and typical Lapple (TL), were involved. The investigation utilized a combination of computational fluid dynamics (CFD) and the discrete element method (DEM) to model the gas−particle behavior. The DEM accounted for the motion of individual particles using Newton's equations, while the CFD solved the Navier−Stokes equations to model the gas flow as a continuous medium. This numerical model successfully simulated the cyclone performance under three-dimensional (3D) true shape modeling of large-sized nonspherical bioparticles considering the particle−particle and particle−wall interaction forces. The experimental validation and verification of the model demonstrated an acceptable agreement with the simulated data. The findings revealed that cyclone dimensions significantly impacted both performance and particle behavior even when operating under identical conditions. Cyclones with matching dimensions between the bottom and vortex finder exhibited improved separation efficiency, while an increase in the vortex finder's diameter led to decreased efficiency, as in St 2 and Sw 2 cyclones. A comprehensive force analysis pinpointed regions of intense particle−wall collisions, predominantly at the cone wall apex and the wall opposite the cyclone inlet, particularly evident in St 1 , Sw 1 , and TL cyclones. Notably, particle−particle interaction forces played a crucial role in cyclone performance with increased separation efficiency observed due to particle collisions. The particle−gas forces, including drag and pressure gradient forces, were mainly affected in the inlet region and extended into the cylindrical part. The pressure gradient force exhibited a minimal impact on particle behavior. Among the cyclone designs tested, the Sw 1 cyclone demonstrated outstanding performance, achieving an impressive effectiveness of 94.4% under the given operational conditions. These findings provide a better understanding of the working mechanisms of gas−particle cyclones and similar swirling multiphase flow systems, allowing for improved optimization.

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Section: Gas−particle Flow Pattern 421 Gas Flow Analysismentioning

confidence: 90%

Modeling and Performance Analysis of Different Gas–Bioparticle Cyclone Separators: CFD–DEM Simulations

El-Emam,

Zhou,

Bai

et al. 2023

Ind. Eng. Chem. Res.

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“…The volume fraction for the discrete phase does not exceed 10%, indicating that the volume fraction of the solid particles is small and the particle–particle interaction can be neglected. Newton’s second law of particle motion is as follows. d u p dt = 18 μ A ρ P d P 2 ( C 1 + C 2 R e P + C 3 R e P 2 ) R e P 24 false( u A − u P false) x where u A and u P are the fluid and particle velocities, respectively; μ A is the fluid viscosity; ρ A and ρ P are the fluid and particle densities, respectively; d P is the particle diameter; Re P represents the particle Reynolds number; and C 1 , C 2 , and C 3 are constants for spherical particles that depend on Re P .…”

Section: Methodsmentioning

confidence: 99%

Study on the Classification Performance of a Novel Wide-Neck Classifier

Zheng,

Min,

Zhu

2023

ACS Omega

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A novelty-designed wide-neck classifier (WNC) was proposed to enhance the passing ability and classification efficiency of fine particles. Using computational fluid dynamics (CFD), we studied the flow field and velocity distribution in the newly designed WNC. The velocity of the fluid gradually decreased from the wall to the center and from the cylinder to the cone, which facilitates particle classification and thickening. The Reynolds number (Re) and turbulent intensity (I) inside the WNC were discussed. The turbulent intensity increased with increasing feed velocity and overflow outlet diameter and decreased with increasing feed concentration and spigot diameter. The classification of coal slurry was performed to analyze the performance of WNC. The classification efficiency increased with increasing feed velocity but decreased as the feed concentration, spigot diameter, and overflow outlet diameter increased. The predictive models for classification efficiency influenced by the operational and structural parameters were constructed at high correlation coefficients, and the average error of these models was analyzed at 0.28%. Our results can provide valuable insights into the development of mineral classification.

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“…20,21 Some researchers have studied the effect of the structural parameters of the cyclone separator, 22−24 including the height of cyclone, 25,26 the length and diameter of the inner cylinder, 27 the number and angle of inlet pipes, 28,29 and the surface roughness parameters. 30 Other researchers have proposed structural innovations in cyclone separators. 11,31,32 It can be seen from the literature review that the cyclone separator is a commonly used primary separation structure in the industry and has been widely concerned by researchers.…”

Section: Introductionmentioning

confidence: 99%

“…The structure of the centrifugal separator is diverse, and its structure will be adjusted appropriately to meet the needs of different occasions . When it is applied to the compressor system, the cyclone separator is often used. , Some researchers have studied the effect of the structural parameters of the cyclone separator, − including the height of cyclone, , the length and diameter of the inner cylinder, the number and angle of inlet pipes, , and the surface roughness parameters . Other researchers have proposed structural innovations in cyclone separators. ,, It can be seen from the literature review that the cyclone separator is a commonly used primary separation structure in the industry and has been widely concerned by researchers.…”

Section: Introductionmentioning

confidence: 99%

Performance Investigation and Optimization of the Primary Separation Part of the Oil-Gas Separator

Wang

Hu²,

Xu³

et al. 2023

Ind. Eng. Chem. Res.

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Oil-gas separators are significant in the safe and reliable operation of the natural gas storage system. The separation efficiency of the conventional primary separation part of the oil-gas separator was not high enough, causing the insufficient performance of the whole separator. Three modification schemes were proposed to optimize the primary separation part of the oil-gas separator, including adding a curved baffle at the entrance, forming a centrifugal separation through the tangential inlet, and forming a cyclone structure by adding an inner cylinder. The separation performance was obtained through the Eulerian–Lagrangian approach numerically. For each scheme, a variety of parameter combinations were designed by the orthogonal array and the structure with the highest separation efficiency was reasonably selected. The separation efficiency of the centrifugal structure was higher than that of the collision structure on the whole. To evaluate the feasibility of the practical application, the three structural schemes were compared coupled with the analytic hierarchy process (AHP) based on the separation efficiency, the pressure loss, the uniformity of filter inlet velocity, and the modification cost. The results showed that the scheme of adding a curved baffle with reasonable structural parameters at the entrance had better comprehensive performance, which could be used as the optimal scheme in improving the oil-gas separator applied in natural gas storage.

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Impact of non-uniform surface roughness on the erosion rate and performance of a cyclone separator

Cited by 30 publications

References 28 publications

Modeling and Performance Analysis of Different Gas–Bioparticle Cyclone Separators: CFD–DEM Simulations

Modeling and Performance Analysis of Different Gas–Bioparticle Cyclone Separators: CFD–DEM Simulations

Study on the Classification Performance of a Novel Wide-Neck Classifier

Performance Investigation and Optimization of the Primary Separation Part of the Oil-Gas Separator

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