Grade-efficiency modeling and robust parameter design for gas-solids cyclone separators

Wang, Jianjun; Guo, Ying; Pan, Jingna

doi:10.1016/j.powtec.2019.01.020

Cited by 6 publications

(4 citation statements)

References 25 publications

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“…This question will be answered by the results presented in this paper. A large number of papers have been published wherein these models are discussed and used for cyclone performance modelling, some recent ones are refs [5,[7][8][9][10][11][12][13][14][15][16][17] Although it is still such that the classical analytical cyclone cut-size models are the most successful and the most used for predicting cyclone performance, the trend both in the research literature and in industry has been to model cyclones using computational fluid dynamics (CFD). This was for a long time fraught with difficulties, since it turned out that the classical turbulence models, such as the k − ǫ model, could not be used for modelling the strongly swirling confined flows in cyclones.…”

Section: Modellingmentioning

confidence: 99%

Flowpattern in hydrocyclones, numerical simulations with experimental verification

Hoffmann,

Fonnes,

Chang

2023

J. Phys.: Conf. Ser.

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This paper reports a detailed study of the flow in cyclone separators, with the use of most up to date computational fluid dynamics simulations, which are validated with positron emission particle tracking (PEPT) experiments tracing the movement of particles through the cyclone. The parameters varied were the viscosity of the carrier liquid, the flowrate and, in the numerical simulations, the inlet configurations of the cyclone, namely one and two inlets and, with the two inlets, a) both at right angles to the cyclone axis and b) angled downwards. The study reveals features of the flow, which have not been seen till now, but are necessary for the understanding and modelling of the separation and purification efficiency of cyclones. The results of the simulations and the close agreement with experiment are a testament to the reliability and accuracy of large eddy simulation (LES), even for flow features as difficult to simulate as the confined strongly swirling flows in cyclone separators. The results show that a contiguous, smooth surface of zero axial velocity does exist and has approximately the shape that has been assumed by modellers. The significant effects of fluid viscosity, underflow and modifications to the inlet are also shown.

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Section: Modellingmentioning

confidence: 99%

Flowpattern in hydrocyclones, numerical simulations with experimental verification

Hoffmann,

Fonnes,

Chang

2023

J. Phys.: Conf. Ser.

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“…However, the results strongly depended on the selected scaling relationships set (Mirek P., 2018). Wang J. et al (2019) recently conducted experiments extensively and introduced sophisticated models to improve the prediction of grade efficiency of cyclone separators. They constructed generalized linear mixed-effects (GLME) models that are functions of the parameters (St,…”

Section:    mentioning

confidence: 99%

“…To improve the scale-up methodology, Mirek P. (2018) summarized and modified the Muschelknautz model by applying five sets of scaling relationships and found that all the employed sets of scaling relationships resulted in a very high separation efficiency (> 99.7 %). The GLME model developed by Wang J. et al (2019) can predict grade efficiency with a large prediction variability.…”

Section: Conclusion and Future Prospectsmentioning

confidence: 99%

Recent Progress in Efficient Gas–Solid Cyclone Separators with a High Solids Loading for Large-scale Fluidized Beds

Fushimi

Yato

Sakai

et al. 2021

KONA

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Circulating fluidized beds (CFB)s are important technical equipment to treat gas-solid systems for fluid catalytic cracking, combustion, gasification, and high-temperature heat receiving because their mass and heat transfer rates are large. Cyclones are important devices to control the performance of CFBs and ensure their stable operation; heat-carrying and/or solid catalyst particles being circulated in a CFB should be efficiently separated from gas at a reduced pressure loss during separation. In commercial CFBs, a large amount of solids (> 1 kg-solid (m 3-gas)-1 or > 1 kg-solid (kg-gas)-1) is circulated and should be treated. Thus, gas-solid cyclones with a high solids loading should be developed. A large number of reports have been published on gas-solid separators, including cyclones. In addition, computational fluid dynamics (CFD) technology has rapidly developed in the past decade. Based on these observations, in this review, we summarize the recent progress in experimental and CFD studies on gassolid cyclones. The modified pressure drop model, scale-up methodology, and criteria for a single large cyclone vs. multiple cyclones are explained. Future research perspectives are also discussed.

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“…There is also a model available to predict grade efficiency and parametric study to minimize the process variations [17]. Further efforts have been conducted to model the prediction efficiency of cyclone separators [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of Dual Inlet Cyclone Separator

Amirnordin

Hisham

Kasani

et al. 2022

ARASET

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Cyclone separators are suitable to remove particles in extreme conditions with high pressure and temperature during the gas-solid separation process. The important performance of cyclone separators is determined by the separation efficiency and pressure drop. The inlet parameters including the number of inlets, inlet geometry and inlet gas velocity affects the performance of cyclone separators. In this paper, the experimental investigation has been conducted to determine the effects of dual inlet to the separation efficiency of cyclone separators. The cyclone separator was fabricated using the acrylic materials to accommodate the flow observation and trajectories inside the chamber. The experiments were conducted at 9, 11 and 13 m/s of inlet velocity using three particle sizes at 277.5, 42.5 and 625 um. Results showed that as the particle sizes increases, the separation efficiency also increases up to 94.5% for 625 um particles. The findings indicate that the dual inlet cyclone separators increases the performance of cyclone separators especially to remove fly ash in the biomass processing plant and other gas-solid process.

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Grade-efficiency modeling and robust parameter design for gas-solids cyclone separators

Cited by 6 publications

References 25 publications

Flowpattern in hydrocyclones, numerical simulations with experimental verification

Flowpattern in hydrocyclones, numerical simulations with experimental verification

Recent Progress in Efficient Gas–Solid Cyclone Separators with a High Solids Loading for Large-scale Fluidized Beds

Experimental Analysis of Dual Inlet Cyclone Separator

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