Effect of the particle diameter and corona electrode geometry on the particle migration velocity in electrostatic precipitators

Jędrusik, Maria; Gajewski, Juliusz B.; Świerczok, Arkadiusz

doi:10.1016/s0304-3886(01)00047-x

Cited by 41 publications

(17 citation statements)

References 4 publications

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“…Particle collection by this technique has the advantage of a high collection efficiency (especially for small particles) and its pressure drop is low. Numerous attempts have been made in several applications to experimentally use this method to collect aerosol particles (Zukeran et al, 1997;Kim and Lee, 1999;Jedrusik et al, 2001;Laskin and Cowin, 2002;Jedrusik et al, 2003). Moreover, several modeling methods of collection performance have been developed to improve current theoretical works (Kim et al, 2001; Elayyan et al, 2002; Xiangrong et al, 2002.…”

Section: Electrostatic Precipitatormentioning

confidence: 99%

Removal of Soot Particles in Rubber Smoking Chamber by Electrostatic Precipitator to Improve Rubber Sheet Color

Tekasakul

Tantichaowanan

Ōtani

et al. 2006

Aerosol Air Qual. Res.

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Soot particles from wood combustion in the rubber-sheet smoking process darkens the dried sheets, affecting their market price unfavorably. A technique to remove a portion of these particles, especially during the first day of drying, was investigated. A wire-cylinder type corona discharge device or electrostatic precipitator (ESP) was employed to remove the soot particles. Results from a laboratory collection performance test using polystyrene latex particles indicated that the ESP was suitable for use at 220 VAC, which is the highest available voltage supply. The field-test results in a model burner indicated that the device could be used for a period of about 10 hours without cleaning and it could still maintain the collection efficiency at a satisfactory level (higher than 40%). The color of the dried rubber sheets obtained from the smoking chamber in which the collecting device was installed was much lighter than that of the rubber sheets dried in normal operation without removing soot particles. This device could be used in a real rubber smoking chamber by installing 12 identical ESP units in the gas inlet to the chamber.Keywords: corona discharge, rubber sheet, particle collection, wire-cylinder, high voltage et al., Aerosol and Air Quality Research, Vol. 6, No. 1, pp. 1-14, 2006 2 Thailand leads the world in natural rubber production and export. Total production in 2004 was 2.9 million metric tons (Thailand Rubber Research Institute, 2005). About 43% was in the form of ribbed smoked sheets (RSS), in which the rubber latex is coagulated, squeezed to form thin sheets, and then dried in a smoking chamber. Energy consumption and quality of the dried sheets are two major concerns in the process. The color of the dried sheet affects the market price considerably because the RSS is graded according to the impurities in the sheet, as well as to the color. Rubber sheets that are exposed to excessive smoke from wood combustion are dark in color and, hence, the value can be downgraded.Currently, manufacturers deal with this problem by discharging a part of the dust-laden gas after combustion to the atmosphere without using it. However, this results in a huge loss of energy. In order to improve the color of the rubber sheets and not to waste energy, a means of reducing soot particles in the gas is needed. The gas does not require a complete cleanup, since soot particles contain phenolic compounds (Simoneit et al., 1993) which hinder the formation of moulds and bacteria, thus preserving shelf life of the rubber sheets. In this study, an appropriate soot-collecting device is designed and tested in both the laboratory and the field. RUBBER SMOKING CHAMBER AND PARTICLE CHARACTERISTICSMost of the RSS manufacturers in Thailand reside in the south, where production is shifting from large-scale industries to community-level rubber cooperatives. About 500 cooperatives are currently operating throughout the country, each with a capacity to produce about 500-1,000 metric tons per year of ribbed smoked sheets (R...

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Section: Electrostatic Precipitatormentioning

confidence: 99%

Removal of Soot Particles in Rubber Smoking Chamber by Electrostatic Precipitator to Improve Rubber Sheet Color

Tekasakul

Tantichaowanan

Ōtani

et al. 2006

Aerosol Air Qual. Res.

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“…• Charger Design o Jedrusik et al [37] experimented with different corona designs and concluded that, "The results of research on the influence of the electrode geometry on the migration velocity, as presented here and carried out using the ESP model, suggest that the barbed tube is the most effective and useful corona electrode in respect of effective transport of solid particles towards the collection electrodes." o Miller et al [38] performed experiments with varied shapes of the barbed tube.…”

Section: Synopsismentioning

confidence: 94%

“…(This suggests there is an optimum mist/film for water in the ESP.) 37 The corona shapes that they tested were the barbed plate, the wire, the barbed tube, and the spiked band. They concluded that, "The results of research on the influence of the electrode geometry on the migration velocity, as presented here and carried out using the ESP model, suggest that the barbed tube is the most effective and useful corona electrode in respect of effective transport of solid particles towards the collection electrodes.…”

Section: (Ppmentioning

confidence: 99%

Aerosol Particle Collector Design Study

Lee¹,

Dimenna²

2007

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“…Numerous attempts have been made to use this method experimentally in order to collect aerosol particles in several applications (Zukeran et al, 1997;Kim and Lee, 1999;Jedrusik et al, 2001;Laskin and Cowin, 2002;Jedrusik et al, 2003;Kalasee et al, 2006;Srisang et al, 2006;Intra et al, 2007;Kalasee 2009;Intra et al, 2010). Extensive review of electrostatic devices for exhaust gas cleaning was provided by Jaworek et al (2007).…”

Section: Introductionmentioning

confidence: 99%

Application of Electrostatic Precipitator in Collection of Smoke Aerosol Particles from Wood Combustion

Ruttanachot

Tirawanichakul

Tekasakul

2011

Aerosol Air Qual. Res.

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A simple wire-plate electrostatic precipitator (ESP) was constructed in order to test the efficiency of collecting smoke particles from combustion of rubber-wood that is used as a source of biomass energy. The ESP contains a maximum of 15 collection plate electrodes and 20 wire electrodes per row between plates. The maximum input voltage of the Wheatstone bridge circuit using a high-voltage neon transformer was 13.5 kV (DC). The gap between plates and the distance between wires were adjustable. Results from the field test in a furnace indicate that the device could be used for a period of about one hour before cleaning the electrodes was required. The collection efficiency was decreased during the course of wood burning as the dust loading increased. Maximum efficiency was near 80% during the initial period. The distance between the collection plate electrodes had a greater influence on efficiency than the distance between the wire electrodes. The cleaning system used in this experiment was made from a row of PVC pipes to allow water to discharge radially to the plate electrodes on both sides. This system was equipped with the case of maximum collection efficiency that had a 50 mm gap between collection plate electrodes and a 64 mm distance between wire electrodes. Efficiency was increased after 120 minutes and maintained a collection efficiency of about 60%. This ESP is suitable for small and medium-sized enterprises (SMEs) to alleviate the release of detrimental chemicals such as PAHs into the atmosphere.

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Effect of the particle diameter and corona electrode geometry on the particle migration velocity in electrostatic precipitators

Cited by 41 publications

References 4 publications

Removal of Soot Particles in Rubber Smoking Chamber by Electrostatic Precipitator to Improve Rubber Sheet Color

Removal of Soot Particles in Rubber Smoking Chamber by Electrostatic Precipitator to Improve Rubber Sheet Color

Aerosol Particle Collector Design Study

Application of Electrostatic Precipitator in Collection of Smoke Aerosol Particles from Wood Combustion

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