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Salakhova EI, Dmitriev AV, Zinurov VE, Nabiullin IR, Salakhov II. Dust Collector for Paraffin Dehydrogenation Units with a Fluidized Catalyst Bed. CATALYSIS IN INDUSTRY 2022. [DOI: 10.1134/s2070050422040109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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2
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Experimental Investigation of Possibilities to Improve Filtration Efficiency of Tangential Inlet Return Cyclones by Modification of Their Design. ENERGIES 2022. [DOI: 10.3390/en15113871] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
It has been shown that tangential inlet return cyclones are commonly used for inlet air filtration of off-road vehicle engines. The wear of the engine elements, and thus their durability, is determined by the efficiency and accuracy of the inlet air filtration. It has been shown that the possibilities of increasing the separation efficiency or decreasing the pressure drop of a cyclone by changing the main dimensions of the cyclone are limited, because any arbitrary change in one of the dimensions of an already operating cyclone may cause the opposite effect. A literature analysis of the possibility of increasing the filtration efficiency of cyclones by modifying the design of selected cyclone components was conducted. In this paper, three modifications of the cyclone design with a tangential inlet of the inlet air filter of a military tracked vehicle were proposed and performed. The symmetrical inlet of the cyclone was replaced with an asymmetrical inlet. The cylindrical outlet tube was replaced with a conical tube, and the edges of the inlet opening were given an additional streamlined shape. The modification process was carried out on three specimens of the reversible cyclone with a tangential inlet. After each modification, an experimental evaluation of the modifications was carried out. The influence of the modifications on the cyclone’s efficiency characteristics and pressure drop was examined. Subsequent modifications of the cyclone were performed on the same specimen without removing the previous modifications. Tests were performed in the air flow range QG = 5–30 m3/h. Polydisperse “fine” test dust with grain size dpmax = 80 µm was used for testing. The dust concentration at the cyclone inlet was set at 1 g/m2. The performed modifications caused a slight (about 1%) increase in separation efficiency in the range of small (up to QG = 22 m3/h) flux values and about 30% decrease in pressure drop in the whole range of the QG flux, which positively influences the increase in engine filling and its power. There was a noticeable increase in filtration accuracy in the range of low and high values of QG flux, which results in a decrease in the wear of engine components, especially the piston-piston ring-cylinder (P-PR-C) association, and an increase in their durability.
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3
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Insight into performance and mechanism of energy loss for microscale vortex separator/reactor with symmetrical multi-inlets. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2021.09.047] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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4
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Theoretical and Experimental Studies of Uneven Dust Suction from a Multi-Cyclone Settling Tank in a Two-Stage Air Filter. ENERGIES 2021. [DOI: 10.3390/en14248396] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this paper, the uneven air stream distribution problem of individual cyclones is studied in the multi-cyclones of intake air filters in special vehicles’ engines. This problem increases in multi-cyclones, in which several dozen cyclones have a common dust trap from which the collected dust is continuously removed by ejection suction. The aim of this study is the recognition of the theoretical and experimental possibility of reducing the streams’ unevenness, which should result in an efficiency increase in multi-cyclone separation. The methods that led to obtaining a relative stream uniformity from the suction of individual cyclones was analyzed. The method for creating equal pressure drops between the suction streams in the channels was used to achieve this goal. For this purpose, the internal structure of the multi-cyclone settler was changed. The multi-cyclone settling tank space was divided by vertical partitions into independent segments. The settling tank segment was then divided with horizontal shelves into suction channels of different heights, which were assigned a specific number of individual cyclones. The suction channels’ height was theoretically selected in terms of the equal resistance to air stream flow through the channels. For this purpose, the multi-cyclone dust settler segment model was developed. The theoretically determined suction channel’s height was verified by performing experimental flow tests in four (A, B, C, D) dust settler variants. Suction streams of satisfactory uniformity from the cyclones of the variant D settling tank were obtained at a level of 5%. In the next stage, experimental tests of the segment cyclones were carried out with dust before and after the division into suction channels of variant D for the settling tank. A significant increase was achieved from 93.73% to 96.08% in the cyclones’ separation efficiency, which were located as far away from the suction stub as possible and led to a reduction in the non-uniformity of cyclone efficiency in the segment. It follows that the multi-cyclone dust settling segment’s internal structure change gave the expected results.
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Modeling and numerical simulation of flow field in three types of standard new design cyclone separators. ADV POWDER TECHNOL 2021. [DOI: 10.1016/j.apt.2021.09.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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6
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Safikhani H, Rafiee M, Ashtiani D. Numerical study of flow field in new design cyclones with different wall temperature profiles: Comparison with conventional ones. ADV POWDER TECHNOL 2021. [DOI: 10.1016/j.apt.2021.07.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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7
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Dehdarinejad E, Bayareh M. An Overview of Numerical Simulations on Gas‐Solid Cyclone Separators with Tangential Inlet. CHEMBIOENG REVIEWS 2021. [DOI: 10.1002/cben.202000034] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ehsan Dehdarinejad
- Shahrekord University Department of Mechanical Engineering Shahrekord Iran
| | - Morteza Bayareh
- Shahrekord University Department of Mechanical Engineering Shahrekord Iran
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Babaoğlu NU, Parvaz F, Hosseini SH, Elsayed K, Ahmadi G. Influence of the inlet cross-sectional shape on the performance of a multi-inlet gas cyclone. POWDER TECHNOL 2021. [DOI: 10.1016/j.powtec.2021.02.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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9
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Dehdarinejad E, Bayareh M, Ashrafizaadeh M. A numerical study on combined baffles quick-separation device. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2021. [DOI: 10.1515/ijcre-2021-0007] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The transfer of particles in laminar and turbulent flows has many applications in combustion systems, biological, environmental, nanotechnology. In the present study, a Combined Baffles Quick-Separation Device (CBQSD) is simulated numerically using the Eulerian-Lagrangian method and different turbulence models of RNG k-ε, k-ω, and RSM for 1–140 μm particles. A two-way coupling technique is employed to solve the particles’ flow. The effect of inlet flow velocity, the diameter of the splitter plane, and solid particles’ flow rate on the separation efficiency of the device is examined. The results demonstrate that the RSM turbulence model provides more appropriate results compared to RNG k-ε and k-ω models. Four thousand two hundred particles with the size distribution of 1–140 µm enter the device and 3820 particles are trapped and 380 particles leave the device. The efficiency for particles with a diameter greater than 28 µm is 100%. The complete separation of 22–28 μm particles occurs for flow rates of 10–23.5 g/s, respectively. The results reveal that the separation efficiency increases by increasing the inlet velocity, the device diameter, and the diameter of the particles.
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Affiliation(s)
- Ehsan Dehdarinejad
- Department of Mechanical Engineering , Shahrekord University , Shahrekord , Iran
| | - Morteza Bayareh
- Department of Mechanical Engineering , Shahrekord University , Shahrekord , Iran
| | - Mahmud Ashrafizaadeh
- Department of Mechanical Engineering , Isfahan University of Technology , Isfahan , 84156-83111, Iran
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Wang D, Sun L, Yan C, Wang J, Wei Y. Effects of gas leakage from the dipleg on the pressure characteristics in a cyclone separator. CAN J CHEM ENG 2020. [DOI: 10.1002/cjce.23917] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Di Wang
- State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing China
| | - Liqiang Sun
- State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing China
| | - Chaoyu Yan
- State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing China
| | - Jiangyun Wang
- Institute of Engineering China University of Petroleum‐Beijing at Karamay Karamay China
| | - Yaodong Wei
- Institute of Engineering China University of Petroleum‐Beijing at Karamay Karamay China
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Wang D, Sun L, Wang J, Liu J, Wei Y, Song J. Experimental study of the dynamic characteristics of a cyclone by hot wire/film anemometry: Effects of gas leakage. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117365] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Safikhani H, Allahdadi S. The effect of magnetic field on the performance of new design cyclone separators. ADV POWDER TECHNOL 2020. [DOI: 10.1016/j.apt.2020.04.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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13
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Elsayed K, Parvaz F, Hosseini SH, Ahmadi G. Influence of the dipleg and dustbin dimensions on performance of gas cyclones: An optimization study. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.116553] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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14
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Fatahian H, Hosseini E, Fatahian E. CFD simulation of a novel design of square cyclone with dual-inverse cone. ADV POWDER TECHNOL 2020. [DOI: 10.1016/j.apt.2020.02.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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15
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CFD Modeling of Gas–Solid Cyclone Separators at Ambient and Elevated Temperatures. Processes (Basel) 2020. [DOI: 10.3390/pr8020228] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Gas–solid cyclone separators are widely utilized in many industrial applications and usually involve complex multi-physics of gas–solid flow and heat transfer. In recent years, there has been a progressive interest in the application of computational fluid dynamics (CFD) to understand the gas–solid flow behavior of cyclones and predict their performance. In this paper, a review of the existing CFD studies of cyclone separators, operating in a wide range of solids loadings and at ambient and elevated temperatures, is presented. In the first part, a brief background on the important performance parameters of cyclones, namely pressure drop and separation efficiency, as well as how they are affected by the solids loading and operating temperature, is described. This is followed by a summary of the existing CFD simulation studies of cyclones at ambient temperature, with an emphasis on the high mass loading of particles, and at elevated temperatures. The capabilities as well as the challenges and limitations of the existing CFD approaches in predicting the performance of cyclones operating in such conditions are evaluated. Finally, an outlook on the prospects of CFD simulation of cyclone separators is provided.
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Zhao B, Wang D, Su Y. Performance improvement of cyclone separator by integrated compact bends. POWDER TECHNOL 2019. [DOI: 10.1016/j.powtec.2019.05.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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18
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Optimization and experimental investigation in bottom inlet cyclone separator for performance analysis. KOREAN J CHEM ENG 2019. [DOI: 10.1007/s11814-019-0266-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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19
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Gao S, Zhang D, Fan Y, Lu C. A novel gas-solids separator scheme of coupling cyclone with circulating granular bed filter (C-CGBF). JOURNAL OF HAZARDOUS MATERIALS 2019; 362:403-411. [PMID: 30248662 DOI: 10.1016/j.jhazmat.2018.07.065] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 06/25/2018] [Accepted: 07/15/2018] [Indexed: 06/08/2023]
Abstract
A novel gas-solids separator scheme of coupling cyclone with circulating granular bed filter (C-CGBF) was proposed. The influences of the operating regimes, the inlet dust concentrations and the inlet gas flow rates on the scheme were investigated in a pilot-scale cold-model experimental apparatus. The pressure drop and the collection efficiency were measured and analyzed. It was shown that, differing from that under the fixed bed (FB) operating regime, the pressure drop tended to assume a steady state after an increasing period under the moving bed (MB). Experiments under the MB revealed that stable/high collection efficiency, typically exceeding 95%, was achieved with considerably low pressure drop. The dust hold-up in the built-in granular bed and the filter cake formed on the outer screen wall contributed to high collection efficiency, as well as increased the pressure drop. Furthermore, the individual contribution of the cyclone shell and the built-in granular bed to the total collection efficiency under the MB were investigated. The size distributions of the captured particles were also analyzed. The contribution ratios of the cyclone shell were around 80%, while the majority of the particles captured by it were larger than 10 μm.
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Affiliation(s)
- Sihong Gao
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Beijing, 102249, China
| | - Dandan Zhang
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Beijing, 102249, China
| | - Yiping Fan
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Beijing, 102249, China
| | - Chunxi Lu
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Beijing, 102249, China.
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21
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Huang Y, Zhang M, Lyu J, Liu Z, Yang H. Effects of gas leakage on the separation performance of a cyclone. Part 1: Experimental investigation. Chem Eng Res Des 2018. [DOI: 10.1016/j.cherd.2018.03.047] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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22
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Safikhani H, Zamani J, Musa M. Numerical study of flow field in new design cyclone separators with one, two and three tangential inlets. ADV POWDER TECHNOL 2018. [DOI: 10.1016/j.apt.2017.12.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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23
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Mazyan W, Ahmadi A, Ahmed H, Hoorfar M. Enhancement of solid particle separation efficiency in gas cyclones using electro-hydrodynamic method. Sep Purif Technol 2017. [DOI: 10.1016/j.seppur.2017.03.034] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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24
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Mariani F, Risi F, Grimaldi CN. Separation efficiency and heat exchange optimization in a cyclone. Sep Purif Technol 2017. [DOI: 10.1016/j.seppur.2017.02.024] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Fu PB, Wang F, Yang XJ, Ma L, Cui X, Wang HL. Inlet Particle-Sorting Cyclone for the Enhancement of PM 2.5 Separation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:1587-1594. [PMID: 28075569 DOI: 10.1021/acs.est.6b04418] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Many cities are suffering from severe air pollution from fine particulate matter. Cyclone is an effective separator for particulate pollutant but has low efficiency for those with an aerodynamic diameter of 2.5 μm or less (PM2.5). In this research, four novel inlet particle-sorting cyclones were first developed to enhance the separation of PM2.5. The energy consumption, overall separation efficiency, particle grade efficiency,outlet particle concentration and size distribution were compared with common cyclone (CM-C). It was found that the vertical reverse rotation cyclone (VRR-C), which made the smaller particles enter cyclone from radially outer side and axially lower side at the rectangular inlet, had the best separation performance, especially for PM2.5 separation. The mean diameter of inlet particles was 15.7 μm and the particle concentration was 2000 mg/m3, the overall separation efficiency of the VRR-C reached 98.3%, which was 6.4% higher than that of CM-C. PM2.5 grade efficiency of the VRR-C exceeded 80%, which was 15∼20% higher than that of CM-C. The PM2.5 content at the VRR-C outlet was 30.8 mg/m3, while that of CM-C was still 118.4 mg/m3. The novel inlet particle-sorting cyclone is an effective separation enhancement for PM2.5 source control in the process of industrial production and environment protection.
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Affiliation(s)
- Peng-Bo Fu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology , Shanghai, 200237, P. R. China
| | - Fei Wang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology , Shanghai, 200237, P. R. China
| | - Xue-Jing Yang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology , Shanghai, 200237, P. R. China
| | - Liang Ma
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology , Shanghai, 200237, P. R. China
| | - Xin Cui
- Shanghai Huachang Environmental Protection Co. Ltd., Shanghai, 201611, P. R. China
| | - Hua-Lin Wang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology , Shanghai, 200237, P. R. China
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Safikhani H. Modeling and multi-objective Pareto optimization of new cyclone separators using CFD, ANNs and NSGA II algorithm. ADV POWDER TECHNOL 2016. [DOI: 10.1016/j.apt.2016.08.017] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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27
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Ganegama Bogodage S, Leung AYT. Improvements of the cyclone separator performance by down-comer tubes. JOURNAL OF HAZARDOUS MATERIALS 2016; 311:100-114. [PMID: 26967646 DOI: 10.1016/j.jhazmat.2016.02.072] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2015] [Revised: 02/27/2016] [Accepted: 02/29/2016] [Indexed: 06/05/2023]
Abstract
Enhancement of fine particle (PM2.5) separation is important for cyclone separators to reduce any extra purification process required at the outlet. Therefore, the present experimental research was performed to explore the performance of cyclone separators modified with down-comer tubes at solid loading rates from 0 to 8.0 g/m(3) with a 10 m/s inlet velocity. The study proved the effectiveness of down-comer tubes in reducing the particle re-entrainment and increasing the finer separation with acceptable pressure drops, which was pronounced at low solid loading conditions. The experimental results were compared with theories of Smolik and Muschelknautz. Theories were acceptable for certain ranges, and theory breakdown was mainly due to the neglect of particle agglomeration, re-entrainment and the reduction of swirling energy, as well as the increase of wall friction due to presence of particles.
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Affiliation(s)
- Sakura Ganegama Bogodage
- Department of Architectural and Civil Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region, China.
| | - A Y T Leung
- Department of Architectural and Civil Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region, China
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Tan F, Karagoz I, Avci A. The Effects of Vortex Finder Dimensions on the Natural Vortex Length in a New Cyclone Separator. CHEM ENG COMMUN 2016. [DOI: 10.1080/00986445.2016.1160228] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Fuat Tan
- Department of Mechanical Engineering, Uludag University, Bursa, Turkey
| | - Irfan Karagoz
- Department of Mechanical Engineering, Uludag University, Bursa, Turkey
| | - Atakan Avci
- Department of Mechanical Engineering, Uludag University, Bursa, Turkey
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de Souza FJ, Salvo RDV, Martins DDM. Effects of the gas outlet duct length and shape on the performance of cyclone separators. Sep Purif Technol 2015. [DOI: 10.1016/j.seppur.2014.12.008] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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33
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Cyclone performance on removing fibrous particles generated from terry-towels and cotton clothes. POWDER TECHNOL 2014. [DOI: 10.1016/j.powtec.2014.04.057] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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34
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Avci A, Karagoz I, Surmen A, Camuz I. Experimental Investigation of the Natural Vortex Length in Tangential Inlet Cyclones. SEP SCI TECHNOL 2013. [DOI: 10.1080/01496395.2012.675003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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35
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An analytical study of the effect of inlet velocity on the cyclone performance using mathematical models. POWDER TECHNOL 2012. [DOI: 10.1016/j.powtec.2011.10.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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36
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Su Y, Zhao B, Zheng A. Simulation of Turbulent Flow in Square Cyclone Separator with Different Gas Exhaust. Ind Eng Chem Res 2011. [DOI: 10.1021/ie200823s] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yaxin Su
- School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
| | - Bingtao Zhao
- School of Power Engineering, Shanghai University of Science and Technology, Shanghai 200093, China
| | - Anqiao Zheng
- School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
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37
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Su Y, Zheng A, Zhao B. Numerical simulation of effect of inlet configuration on square cyclone separator performance. POWDER TECHNOL 2011. [DOI: 10.1016/j.powtec.2011.03.034] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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38
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Evaluation of numerical schemes using different simulation methods for the continuous phase modeling of cyclone separators. ADV POWDER TECHNOL 2011. [DOI: 10.1016/j.apt.2010.11.009] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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39
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Study of the Pressure Drop and Flow Field in Standard Gas Cyclone Models Using the Granular Model. INTERNATIONAL JOURNAL OF CHEMICAL ENGINEERING 2011. [DOI: 10.1155/2011/791218] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A particle-laden flow inside solid gas cyclones has been studied using computational fluid dynamics (CFD). The effects of high temperatures and different particle loadings have been investigated. The Reynolds stress (RSM) model-predicted results, in the case of pure gas, are within engineering accuracy even at high temperatures. Using the granular mixture model for the cases of particle-laden flow, discrepancies occurred at relatively high loadings (up to 0.5 kg/m3). Since the pressure drop is strongly related to the friction inside the cyclone body, the concept of entropy generation has been employed to detect regions of high frictional effects. Friction has been observed to be important at the vortex finder wall, the bottom of the conical-part wall, and the interface separating the outer and the core streams. The discrepancies between the present numerical simulation and the experimental results taken from the existing literature, which are caused by the mixture and turbulence models simplifying assumptions, are discussed in this paper.
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Azadi M, Azadi M, Mohebbi A. A CFD study of the effect of cyclone size on its performance parameters. JOURNAL OF HAZARDOUS MATERIALS 2010; 182:835-841. [PMID: 20656404 DOI: 10.1016/j.jhazmat.2010.06.115] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2010] [Revised: 06/21/2010] [Accepted: 06/27/2010] [Indexed: 05/29/2023]
Abstract
A three-dimensional Eulerian-Lagrangian fluid dynamics (CFD) model was developed to simulate the gas particulate flow inside cyclones with different sizes. Cyclones of different sizes, were used which named as cyclones I, II, and III. Cyclone I was considered as the biggest and cyclone III was considered as the smallest cyclone. The effects of cyclone size and inlet velocity on hydrodynamics behavior and performance parameters including cut-off diameter and pressure drop were investigated. The renormalization group (RNG) k-epsilon model and Reynolds stress model (RSM) were used to study the effect of turbulent modeling. Particle trajectories were calculated via discrete phase model (DPM). The velocity fluctuations were simulated with discrete random walk (DRW) model to study the turbulent dispersion of particles. The cut-off size and pressure drop were increased with increasing the cyclone size. The RSM predicted the cut-off diameter very well with the deviations of 2.3%, 3.4%, and 3.6% of the experimental data, for cyclones I, II, and III, respectively. CFD model was developed using Fluent code to simulate the gas particulate flow inside cyclone. The simulation results also confirmed the applicability of CFD modeling with RSM as a promising tool to study the cyclone size effect on performance parameters.
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Affiliation(s)
- Mehdi Azadi
- Department of Chemical Engineering, College of Engineering, Shahid Bahonar University of Kerman, P.O. Box 76175-133 Kerman, Iran.
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Qian F, Huang Z, Chen G, Zhang M. Numerical study of the separation characteristics in a cyclone of different inlet particle concentrations. Comput Chem Eng 2007. [DOI: 10.1016/j.compchemeng.2006.09.012] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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