Theoretical and experimental investigation of a pulsed ESP

Elayyan, H.S.B.; Bouziane, A.; Waters, R. T.

doi:10.1016/s0304-3886(02)00067-0

Cited by 16 publications

(5 citation statements)

References 12 publications

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“…In this study, a high voltage, pulsed, positive power supply was used to generate varying impulse peak voltages and impulse frequencies to the corona discharge electrodes. The pulsed power supply had many advantages when compared with the conventional DC high voltage, including: higher peak voltage without excessive breakdown, and therefore better particle charging; control of the corona current independently of precipitator voltage by varying pulse frequency and pulse amplitude, which gives a controllable particle charging rate; a higher overall power input and improved precipitator efficiency can be achieved, and the particle migration velocity is higher because of the stronger average electric field that can be sustained under pulsed conditions [15]. A simple flyblack converter was used for DC-to-DC conversion from 12 VDC to 20 kVDC.…”

Section: High Voltage Power Supplymentioning

confidence: 99%

Demonstration of a Modular Electrostatic Precipitator to Control Particulate Emissions from a Small Municipal Waste Incinerator

Intra¹,

Yawootti²,

Tippayawong³

2014

Journal of Electrical Engineering and Technology

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Incineration is conceptually sound as a waste treatment technology. There is, however, concern over its emissions when it is improperly designed and operated. An electrostatic precipitator is one of the most commonly used devices to control particulate emissions from boilers, incinerators and some other industrial processes. In this work, a modular electrostatic precipitator with sizing of 1 m × 1 m×1 m was developed for removal of particulate matter from the exhaust gases of a small waste incinerator. Its design was based on a simple wire-and-plate concept. The corona discharge wires were connected to a positive high-voltage pulse generator, while the collection plates were grounded. The high-voltage pulse generator was used to produce the corona discharge field between the individual discharge wire and the collection plate. The particulate-laden exhaust gas flow was directed across the corona discharge field. The charged particles were deflected outward and collected on the plate. The collection efficiency was evaluated as a mass loading ratio between the difference at the inlet and the outlet to the particulate loading at the inlet of the precipitator. The collection efficiency of this modular electrostatic precipitator design was approximately 80 %.

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Section: High Voltage Power Supplymentioning

confidence: 99%

Demonstration of a Modular Electrostatic Precipitator to Control Particulate Emissions from a Small Municipal Waste Incinerator

Intra¹,

Yawootti²,

Tippayawong³

2014

Journal of Electrical Engineering and Technology

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“…For high-resistivity dusts, intermittent or pulse high-voltage supplies can be used with good results. The use of power sources that ensure the highest feasible voltage level is a critical condition [13,[19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Investigations on Three-Section Plate-Type Electrostatic Precipitators Used in Thermoelectric Power Plants

2023

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Dust emissions must be managed and reduced as much as possible to safeguard the environment and human health. Plate-type electrostatic precipitators have been used to decrease pollution in a number of sectors, particularly for applications needing massive volumes of gas to be dedusted at high dust concentrations and temperatures. This paper examines large-capacity plate-type electrostatic precipitators with three sections used in a coal-fired thermal power plant. Using simulations and experiments, the collection efficiency (in different ways of supplying sections, without and with sections rapping), the influence of dust resistivity and a dust layer on the surfaces of collection electrodes, the electrical parameters (voltage, current density, and space charge density) for the sections of the electrostatic precipitators, and the electrical parameters of the power sources (voltage, current, power, and power factor) are studied. A higher dust resistivity will cause a change in the shape of the voltage delivered to the sections, an increase in the average voltage from sections, and a decrease in collecting efficiency (by a few percent). A greater degree of intermittence alters the current-voltage characteristics of the sections, decreases the current across the sections, and improves collection efficiency. The density of space charges increases with the degree of intermittency and is highest at the input section. With increasing thickness of the dust layer on the collection electrodes, the collection efficiency increases. PM10 dust particles (which have a lower migration speed) are the hardest to collect with ESPs. When the sections are rapping, PM 20–30 dust particles are more difficult to collect because their migration speeds decrease significantly (compared to the situation when the sections are not rapping). The operation of the power sources of the ESP sections is dynamic, being controlled by the regulators, and the current (or current density), depending on the voltage characteristics, changes permanently (at intervals of a few seconds). The power sources of the sections are deforming consumers (the current is much different from the sinusoidal form).

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“…The purpose of this study was to improve the filtration performance of the ESP by simultaneously modifying the shape of the high-voltage electrode and the power supply characteristics. In the light of prior experimental results [7][8][9][10] we chose to work with a multipoint electrode with a hybrid power supply comprising high-voltage pulses superimposed on a dc voltage. This experimental study was carried out on a reduced-scale ESP installed at the Electrical Engineering Laboratory of the University of Pau, but of the same design as the one used at Marcoule.…”

Section: Introductionmentioning

confidence: 99%

Optimizing the operation of an electrostatic precipitator by developing a multipoint electrode supplied by a hybrid generator

Ferron¹,

Reess²,

Pécastaing³

et al. 2009

J. Phys. D: Appl. Phys.

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The authors investigated and improved the filtration efficiency of an electrostatic precipitator (ESP). A laboratory-scale pilot unit was developed to allow experimentation under conditions approaching those of the industrial ESPs used by the CEA at Marcoule (France). After elucidating the electrical phenomena and optically analysing the physical processes occurring inside the precipitator, a specific electrode was developed for use with a hybrid power supply. The experiments were based on analysing the variation over time of the electric charge injected into the particle separator, the particle mass collected at the ground electrode and the charges quantity measured on a grid in the airstream after the electrode unit. Photos were also taken under different electrical discharge conditions. The results show that combining a multipoint electrode and a hybrid generator (30 kV dc and 30 kV, 1 kHz) improves the process efficiency and significantly extends the time frame (more than 10 h) during which the process operates at optimum efficiency.

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Theoretical and experimental investigation of a pulsed ESP

Cited by 16 publications

References 12 publications

Demonstration of a Modular Electrostatic Precipitator to Control Particulate Emissions from a Small Municipal Waste Incinerator

Demonstration of a Modular Electrostatic Precipitator to Control Particulate Emissions from a Small Municipal Waste Incinerator

Investigations on Three-Section Plate-Type Electrostatic Precipitators Used in Thermoelectric Power Plants

Optimizing the operation of an electrostatic precipitator by developing a multipoint electrode supplied by a hybrid generator

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