Modeling of wire corona electrode operation in electrostatic separation at small and large gaps

Samuilă, A.; Blajan, Marius; Beleca, Radu; Huzau, M.; Morar, R.; Dăscălescu, Lucian; Iuga, A.

doi:10.1016/j.elstat.2005.03.068

Cited by 17 publications

(11 citation statements)

References 3 publications

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“…7). The reversible polarity is useful for the study of the corona discharge [15], DC charge neutralization of pinned insulating granules, ore separation experiments [1], [3], [4], and insulation-metal granular Fig. 5.…”

Section: B Electronic High-voltage Supply For the Active Electrodesmentioning

confidence: 99%

“…The High-Intensity Electric Fields Laboratory at the Technical University of Cluj-Napoca developed two roll-type laboratory separators: ILES-1 and ELSEP [11,12]. The electrostatic separator ELSEP has been specifically designed for performing a wide range of research activities: (i) electric field and corona discharge studies [12][13][14][15]; (ii) particle charging and trajectory control experiments [16][17][18]; (iii) electrostatic separation feasibility tests for brass [19], iron ore [20], and metal-plastic [21]; (iv) training of undergraduate and graduate students, professional engineers and scientists in the field of electrostatics [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

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Electric and electronic equipment of a research-oriented electrostatic separator

Butunoi

Gagiu

Bilici

et al. 2010

2010 12th International Conference on Optimization of Electrical and Electronic Equipment

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The present work was aimed for updating (optimizing) the design of the research-oriented roll-type electrostatic separator ELSEP. The new equipment has several distinctive features: (i) large variety of corona and electrostatic electrodes; (ii) reversible 100 kV, 3 mA DC high-voltage supply; (iii) variable-speed roll drive with induction motor and frequency convertor; (iv) ergonomic control panel. They enable the optimization of the electrostatic separation processes by the accurate measurement and control of the operating conditions. The typical applications of ELSEP are: (i) electric field and corona discharge studies; (ii) particle charging and trajectory control experiments; (iii) electrostatic separation feasibility tests; (iv) training of undergraduate and graduate students, professional engineers and scientists in the field of electrostatics. The technical information given in this paper is expected to be of help to other researchers in building similar laboratory equipment.Index Terms -Electrostatic separator, electric field, high voltage equipment, electric diagram.I.

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Section: B Electronic High-voltage Supply For the Active Electrodesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electric and electronic equipment of a research-oriented electrostatic separator

Butunoi

Gagiu

Bilici

et al. 2010

2010 12th International Conference on Optimization of Electrical and Electronic Equipment

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View full text Add to dashboard Cite

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“…C ORONA discharge is commonly employed in various electrostatic processes: metal insulation separation [1]- [3], precipitation of dust [4]- [7], and charging of electrets for air filters [8]- [11]. A lot of work has already been done to characterize the various types of corona electrodes and to compute the electric field strength, as well as the ionic charge density that they generate [12]- [19].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Characterization of Corona Discharge Generated by a Triode Electrode System

Bouteffaha

Bendaoud

Tilmatine

et al. 2015

IEEE Trans. on Ind. Applicat.

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The triode electrode system is frequently employed for accurately controlling the corona charging of insulating materials. The primarily aim of this paper is to characterize this electrode system by current-voltage and current density distribution measurements. The electrostatic aspect of the electric field generated by the triode electrode system is also numerically analyzed using a charge simulation program. The ionizing element of the electrode system is a thin tungsten wire (diameter: 200 μm) attached to a cylinder (diameter: 26 mm) and distanced at 34 mm from its axis. The wire-cylinder assembly is a "dual" electrode, facing a grid electrode, connected to a well-defined potential, and grounded plate electrode (aluminum, 250 mm × 130 mm). The interelectrode spacing has a very significant influence on the current-voltage characteristics of the triode system and on the extension of the corona discharge generated by it. The experimental results obtained for different geometries of the electrode system are interpreted in the light of the numerical modeling of the electric field, in order to make some recommendations regarding its design: reduce/increase the wire-grid distance in order to diminish the operating high voltage/expend the surface affected by the corona discharge. Index Terms-Corona, current density, current-voltage characteristics, electric field, electrostatic processes.Ahmed Bouteffaha (M'12) was born in Tighennif, Algeria, in 1961. He received the Engineering degree in electrical engineering from the University of Sciences and Technology, Oran, Algeria, in 1989 and the Magister (Dr.Eng.) degree from the Department of Electrical Engineering, University of Mascara, Mascara, Algeria, in 2010. Part of his Ph.D. dissertation was prepared at the University Institute of Technology, Angoulême, France.Since 2010, he has been teaching electric machine courses at the Department of Electrical Engineering, University of Mascara. He is a member of the Application of Plasma, Electrostatics and Electromagnetic Compatibility (APELEC) Laboratory. He has published several scientific papers in conference proceedings. His current research interests include electrostatic separation technologies, high-voltage insulation and gas discharges, and electromagnetic fields.Abdelber Bendaoud (M'08-SM'09) received the Engineering degree in electrical engineering from the University of Sciences and Technology, Oran, Algeria, in 1982 and the M.S. and Doctorate degrees from the Institute of Electrical Engineering, University of Sidi Bel Abbes, Sidi Bel Abbes,

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“…The efficiency of corona charging processes, utilized in electrostatic separation, usually depends on a multitude of factors including the level and polarity of the high-voltage supply as well as on the different geometrical parameters of the electrode system. Significant efforts and research have been carried out to characterize the various types of electrodes and to compute their corona onset voltage V o , electric field strength E, as well as the generated ionic current density J [7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…The conducting particles, upon contact with the grounded electrode, lose their charges. Under the action of the electric field, they get charged by electrostatic induction and are projected towards the static electrode of opposite polarity [7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigations of the corona characteristics of a new Tri-electrode system for electrostatic separation processes

Abouelsaad

Abouelatta

Salama

2014

Eur. Phys. J. Appl. Phys.

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The paper presents the measurement and computation of the corona onset voltages, electric field and ion current density profiles of a new "Tri-electrode system" intended for electrostatic separation applications. Unlike the well-known "dual cylinder-wire electrode system", the new system utilizes an extra adjustable wire in order to provide the means for a more efficient ion charging current; necessary for separation of different granular mixtures. An experimental setup is constructed to model the present multi-electrode arrangement. The measurements are carried out for wire diameters between 0.3-1.0 µm and for different geometrical parameters. Without resorting to the commonly used Deutch's assumption, a computational scheme is developed to solve the corona equations and to compute the associated ionized field quantities of the system. Mapping of the ion flow field patterns demonstrates the impact of this assumption on the solution's accuracy. The computed results were found to be in good agreement with experiments. The configuration offers a more efficient charging process and separation in comparison with earlier separators' designs.

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Modeling of wire corona electrode operation in electrostatic separation at small and large gaps

Cited by 17 publications

References 3 publications

Electric and electronic equipment of a research-oriented electrostatic separator

Electric and electronic equipment of a research-oriented electrostatic separator

Experimental and Numerical Characterization of Corona Discharge Generated by a Triode Electrode System

Experimental and numerical investigations of the corona characteristics of a new Tri-electrode system for electrostatic separation processes

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