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Modelling of tribo-electrostatic separation for industrial by-products recycling


Tribo-electrostatic separation is a dry technology which allows the elimination of impurities from industrial wastes on the basis of their surface charging characteristics. In this paper results of investigations aiming to numerically simulate the tribo-electrostatic separation of fine particles for industrial by-products recycling are described. After charging in a pneumatic transport line, the mixture of the particles to be separated is injected in a separation chamber where a DC electric field is created using two parallel plate electrodes. The particle/gas flow inside the chamber was simulated using an extended commercial computational fluid dynamics (CFD) code. The three-dimensional turbulent flow was calculated. Based on the Lagrangian approach, the trajectories of the powder particles ( < 100 microns) were modelled considering electric and aerodynamic forces. Comparison of the simulation results with experiments carried out with a bench-scale separation unit are presented for the case of silica beads, whose electric characteristics resemble those of coal fly ashes. The effects of particle charge, electric field and injection velocity were investigated, revealing that a proper choice of separator geometry and flow parameters allows unwanted fine particles in industrial wastes like fly ash to be efficiently removed.......

【作者名称】: F. Cangialosi, F. Crapulli, G. Intini, L. Liberti, M. Notarnicola
【作者单位】: Department of Environmental Engineering and Sustainable Development, Technical University of Bari, Toronto, Italy
【关 键 词】: powder wastes, tribo-electrostatic separation, computational fluid dynamics (CFD)
【会议名称】: Waste Management and the Environment III; WIT Transactions on Ecology and the Environment; vol.92
【期刊论文数据库】: [DBS_Articles_01]
【期刊论文编号】: 101,935,474
【摘要长度】: 1,342
【会议地点】: Malta(MT)
【会议组织】: Department of Environmental Engineering and Sustainable Development, Technical University of Bari, Toronto, Italy
【会议时间】: 2006
【上篇论文】: 外文会议 - Studies in Boilers based on biomass fuels Using CFD
【下篇论文】: 外文会议 - Derivation of population distribution for vulnerability assessment in flood-prone German cities using multisensoral remote sensing data

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