Efficiency Characteristics of Wet Type Electrostatic Precipitator

• Main Authors: Yu-Chich Cheng, 鄭宇智
• Other Authors: 林文印
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/7mz659

碩士 === 國立臺北科技大學 === 環境規劃與管理研究所 === 102 === Electrostatic Precipitator (ESP) is a high efficiency dust collector, which utilizes electric energy to remove particulate matter. The capital cost of ESP is relatively more expensive than other general dust collector. However, duo to the lower operational cost, ESP is widely used in industry for improving pollutant emissions. Nevertheless, the traditional dry ESP still have some problems: reduction of the collection efficiency due to particle deposition on the discharge and collection electrodes, back corona, and particle re-entrainment. In this study, a wet electrostatic precipitator (wet ESP) be designed and investigated to improve the ESP. The objectives of this research included efficiency characteristics of wet ESP and dry ESP, the materials of collecting plate on particle collection efficiency, the electrical resistivity of particle on collection efficiency, and the ozone concentration of wet ESP. The experimental results indicated that the wet ESP can improve the high resistivity particulate loading of the dry ESP after long time elapsed. Then the research compares the different collection efficiency with different materials of the collector. The ESP was operated at voltage -10kV. In the dry ESP, the particle penetration of stainless steel collector and conductive glass collector were under 6%, but the particle penetration of glass collector was over 40%. In the wet ESP, the particle penetration of glass collector reduced below 20%. These results showed that the collection efficiency of glass collector can be improved in the wet ESP. In addition, the ozone production was linear on the current, therefore, at the same electric field, the ozone concentration increased as increasing the corona current. According to the Experimental results, the ozone concentration of glass collector is lower than the stainless steel collector and conductive glass collector.