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Direct comparison of CFD-DEM simulation and experimental measurement of Geldart A particles in a micro-fluidized bed. Chem Eng Sci 2021. [DOI: 10.1016/j.ces.2021.116725] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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A Numerical Study of Separation Performance of Vibrating Flip-Flow Screens for Cohesive Particles. MINERALS 2021. [DOI: 10.3390/min11060631] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Vibrating flip-flow screens (VFFS) are widely used to separate high-viscosity and fine materials. The most remarkable characteristic is that the vibration intensity of the screen frame is only 2–3 g (g represents the gravitational acceleration), while the vibration intensity of the screen surface can reach 30–50 g. This effectively solves the problem of the blocking screen aperture in the screening process of moist particles. In this paper, the approximate state of motion of the sieve mat is realized by setting the discrete rigid motion at multiple points on the elastic sieve mat of the VFFS. The effects of surface energy levels between particles separated via screening performance were compared and analyzed. The results show that the flow characteristics of particles have a great influence on the separation performance. For 8 mm particle screening, the particle’s velocity dominates its movement and screening behavior in the range of 0–8 J/m2 surface energy. In the feeding end region (Sections 1 and 2), with the increase in the surface energy, the particle’s velocity decreases, and the contact time between the particles and the screen surface increases, and so the passage increases. When the surface energy level continues to increase, the particles agglomerate together due to the effect of the cohesive force, and the effect of the particle’s agglomeration is greater than the particle velocity. Due to the agglomeration of particles, the difficulty of particles passing through the screen increases, and the yields of various size fractions in the feeding end decrease to some extent. In the transporting process, the agglomerated particles need to travel a certain distance before depolymerization, and the stronger the adhesive force between particles, the larger the depolymerization distance. Therefore, for the case of higher surface energy, the screening percentage near the discharging end (Sections 3 and 4) is greater. The above research is helpful to better understand and optimize the screening process of VFFS.
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Liu P, LaMarche CQ, Kellogg KM, Hrenya CM. A square‐force cohesion model and its extraction from bulk measurements. AIChE J 2018. [DOI: 10.1002/aic.16089] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Peiyuan Liu
- Dept. of Chemical and Biological EngineeringUniversity of Colorado BoulderBoulder CO 80309
| | - Casey Q. LaMarche
- Dept. of Chemical and Biological EngineeringUniversity of Colorado BoulderBoulder CO 80309
| | - Kevin M. Kellogg
- Dept. of Chemical and Biological EngineeringUniversity of Colorado BoulderBoulder CO 80309
| | - Christine M. Hrenya
- Dept. of Chemical and Biological EngineeringUniversity of Colorado BoulderBoulder CO 80309
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Wu Y, Hou Q, Yu A. Particle-Scale Study of Structural Transition of Solid Phase in Gas-Fluidized Beds. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b00419] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yongli Wu
- Laboratory
for Simulation and Modelling of Particulate Systems, Department of
Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia
| | - Qinfu Hou
- Laboratory
for Simulation and Modelling of Particulate Systems, Department of
Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia
| | - Aibing Yu
- Laboratory
for Simulation and Modelling of Particulate Systems, Department of
Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia
- Centre
for Simulation and Modelling of Particulate Systems, Southeast University−Monash University Joint Research Institute, Suzhou 215123, PR China
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Wilson R, Dini D, van Wachem B. A numerical study exploring the effect of particle properties on the fluidization of adhesive particles. AIChE J 2016. [DOI: 10.1002/aic.15162] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Robert Wilson
- Department of Physics; The Blackett Laboratory, Imperial College London; London SW7 2AZ UK
| | - Daniele Dini
- Department of Mechanical Engineering; Imperial College London; London SW7 2AZ UK
| | - Berend van Wachem
- Department of Mechanical Engineering; Imperial College London; London SW7 2AZ UK
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Thornton C, Yang F, Seville J. A DEM investigation of transitional behaviour in gas-fluidised beds. POWDER TECHNOL 2015. [DOI: 10.1016/j.powtec.2014.10.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Liu P, Hrenya CM. Challenges of DEM: I. Competing bottlenecks in parallelization of gas–solid flows. POWDER TECHNOL 2014. [DOI: 10.1016/j.powtec.2014.04.095] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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DEM–CFD analysis of fluidization behavior of Geldart Group A particles using a dynamic adhesion force model. POWDER TECHNOL 2013. [DOI: 10.1016/j.powtec.2013.02.028] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Wu CY. Special issue on discrete element modelling. POWDER TECHNOL 2013. [DOI: 10.1016/j.powtec.2013.08.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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