Fine Coal Ash Collection Efficiency of Advanced Low Temperature Electrostatic Precipitator on Pulverized Coal Combustion

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  • Noda Naoki
    Energy Engineering Research Laboratory, Central Research Institute of Electric Power Industry
  • Mizuno Ayana
    Energy Engineering Research Laboratory, Central Research Institute of Electric Power Industry
  • Makino Hisao
    Energy Engineering Research Laboratory, Central Research Institute of Electric Power Industry
  • Tsukada Mayumi
    Graduate School of ,Bio-Applications & Systems Engineering, Tokyo University of Agriculture and Technology
  • Hama Naoya
    Graduate School of ,Bio-Applications & Systems Engineering, Tokyo University of Agriculture and Technology
  • Lenggoro Wuled
    Graduate School of ,Bio-Applications & Systems Engineering, Tokyo University of Agriculture and Technology
  • Kamiya Hidehiro
    Graduate School of ,Bio-Applications & Systems Engineering, Tokyo University of Agriculture and Technology

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Other Title
  • 微粉炭燃焼火力用低低温電気集じん装置の微粒子捕集性能
  • 徴粉炭燃焼火力用低低温電気集じん装置の微粒子捕集性能
  • チョウフンタン ネンショウ カリョクヨウ テイテイオン デンキ シュウジン ソウチ ノ ビリュウシホシュウ セイノウ

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Abstract

<p>Electrostatic precipitator (ESP) is a major dust collection equipment in pulverized coal combustion boiler in Japan. As the environmental influence of fine particle such as PM2.5 in the atmosphere is focused recently, the improvement of the collection efficiency of fine particle on ESP is desired. An advanced low temperature ESP operated under 363 K has been used recently because of its availability for high electric resistivity coal ash. In this study, the separation characteristics of fine coal ash particle by the control of operation condition on advanced low temperature ESP in a pulverized coal combustion boiler is investigated. It is estimated that the fractional collection efficiency of advanced low temperature ESP shows a minimum value at the particle size in the range 0.5 to 1.0 μm. The collection efficiency of fine particle under 2.5 μm is improved by the increase of current density of ESP and the control of gas flow pattern in ESP is one of the effective method for the improvement of the collection efficiency of ESP.</p>

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