Electrical characteristics of electrostatic precipitator with a wet membrane-based collecting electrode

Wang, Xiang; Chang, Jiang; Xu, Chunyan; Wang, Peng; Cui, Lin; Ma, Chunyuan

doi:10.1016/j.elstat.2016.02.003

Cited by 22 publications

(9 citation statements)

References 17 publications

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“…13,20 Numerous studies on the discharge characteristics of wire-plate ESPs have been reported; these studies include investigations of emitter geometry and material on the electrode corona discharge to optimize the discharge electrode through experimental and numerical methods. [21][22][23][24][25] Electrodes with different shapes, diameters, and intervals were tested in an experimental-scale ESP at high temperatures, 26,27 and migration velocity was also investigated. 28,29 Corona discharge and particle collection characteristics in a wet ESP with a ne water mist were discussed.…”

Section: Introductionmentioning

confidence: 99%

“…28,29 Corona discharge and particle collection characteristics in a wet ESP with a ne water mist were discussed. 23,30 The electric power consumption of the ESP with spikes on both sides is nearly twice as much as that of the ESP with spikes on only one side. 31 The electrical characteristics and ionic wind vary with the spike point spacing.…”

Section: Introductionmentioning

confidence: 99%

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Current density distribution and optimization of the collection electrodes of a honeycomb wet electrostatic precipitator

et al. 2018

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Current density distribution and optimization of the collection electrodes of a honeycomb wet electrostatic precipitator

et al. 2018

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“…Several studies have shown that wet electrostatic precipitators (WESPs) are more efficient for collecting sticky and highly resistive particles, acid aerosols, and nanoparticles (Bayless et al 2004;Chen et al 2014;Parihar, Hammer, and Sridhar 2015;Wang et al 2016). These systems provide stronger corona power compared with dry ESPs due to the fact that the accumulated fly ash is washed off the collector plates, preventing any back corona.…”

Section: Introductionmentioning

confidence: 99%

“…The collection membranes were lighter in weight and resisted corrosion (Bayless et al 2004). The discharge current was much stronger when the wet membrane was used (Wang et al 2016). Recent developments at Ohio University's ESP Laboratory include a patent pending (Hajrudin and Alam 2016) novel cross-flow WESP, which utilized multiple cells.…”

Section: Introductionmentioning

confidence: 99%

Integration of novel hybrid composite discharge electrode with semi-pilot novel cross-flow electrostatic precipitator

Ali

Al-Majali

Kennedy

et al. 2018

Journal of the Air & Waste Management Association

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Wet electrostatic precipitators (WESPs) are modern-era pollution control systems specifically designed to capture ultrafine particles as well as acid mist, highly resistive and sticky particles; however, this requires the use of expensive corrosion-resistant metal alloys. The work presented here is part of a continuing study at Ohio University aimed at reducing the cost of WESPs by using a novel combination of a polymer collector surfaces with a hybrid composite discharge electrode. In this study, a hybrid composite discharge electrode was tested, for the first time, inside a semi-pilot-scale experimental setup, with collection surfaces consists of a vertical array of strands. Particle laden gases were passed through this array of polymer ropes, which were kept wet by a small flow of water. The discharge electrodes were composite laminates of carbon fibers in a polymer matrix enclosing a metal mesh. The preliminary results showed that this new integrated system of composite discharge electrode and polymer collector surfaces can match or exceed the performance of a conventional metal alloy electrostatic precipitator (ESP) with metal discharge electrodes. There are additional advantages due to the system being compact, lightweight, and highly corrosion resistant. Implications: This study focused on integrating and assessing performance of a novel hybrid composite electrode (HCE) inside semi-pilot novel cross-flow electrostatic precipitator at conditions typically observed in coal-fired power plant exhausts. The results were collected for particulate collection efficiencies and were compared with a rigid metal electrode. The HCE outperformed metal electrode by showing higher particulate collection efficiency. This result showcases substantial potential for these two new technologies (HCE and cross-flow system) as a substitute for conventional metal based wet ESPs.

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“…Wet electrostatic precipitators (WESPs) are nowadays used to remove fine particles and sulfuric acid aerosols in a coal-fired power plant. , In theory, removing fine particulate matter from flue gas would decrease the amount of arsenic released into the environment. Research has shown that fine particulate matter after the WESP is mainly derived from desulfurization gypsum .…”

Section: Introductionmentioning

confidence: 99%

Effect of Coordinated Air Pollution Control Devices in Coal-Fired Power Plants on Arsenic Emissions

et al. 2017

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An arsenic emission study was performed at nine coal-fired power plants in China and the U.S. that are equipped with various air pollution control devices (APCDs). On average, over 90% of arsenic in the flue gas is captured by the dry particulate matter collection system. Less than 3% of arsenic remains in the boiler slag, and 3% is captured by the desulfurization system. Another 1% is captured by wet precipitators. The remaining arsenic is emitted from the stack. Ultralow-emission technology with a low-temperature economizer before the electrostatic precipitator (ESP) promotes the capture of more arsenic compounds. It was found that reactions between arsenic and the denitrification catalyst make it difficult to reach a perfect arsenic mass balance in a power plant, excluding plants that are equipped with a hot ESP installed before the selective catalytic reduction system. Arsenic speciation greatly depends upon the temperature of the flue gas and the location of the measurement. There are no significant differences between U.S. and Chinese coals with regard to the behavior of arsenic during combustion and its interaction with power plant APCD systems.

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Electrical characteristics of electrostatic precipitator with a wet membrane-based collecting electrode

Cited by 22 publications

References 17 publications

Current density distribution and optimization of the collection electrodes of a honeycomb wet electrostatic precipitator

Current density distribution and optimization of the collection electrodes of a honeycomb wet electrostatic precipitator

Integration of novel hybrid composite discharge electrode with semi-pilot novel cross-flow electrostatic precipitator

Effect of Coordinated Air Pollution Control Devices in Coal-Fired Power Plants on Arsenic Emissions

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