Influence of Re-entrainment Phenomena on Particle Deposit in Electrostatic Precipitator

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  • 二段式電気集じん装置における集じん部電極上の粒子堆積分布に対する再飛散現象の影響
  • 2ダンシキ デンキ シュウジン ソウチ ニ オケル シュウジンブ デンキョク ジョウ ノ リュウシ タイセキ ブンプ ニ タイスル サイヒサン ゲンショウ ノ エイキョウ

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Abstract

Electrostatic precipitator (ESP) has been used to improve the visibility index and clean the air in highway tunnels. Most of particles in the highway tunnels are composed of carbon. Decrease of the collection efficiency due to particle re-entrainment is important problem when ESP collects carbon particles that have low electric resistance. In this work, we discuss the exhausting process of re-entrained particles from ESP. The process was discussed by particle deposit condition on collecting electrodes. The results show that the collected particles on collecting electrodes migrate to downstream with jumping between grounded and positive collecting electrodes. The particle shapes change into sphere from pearl chain when particles have been jumped between collecting electrodes. Therefore, re-entrained particles deposit on middle of electrodes.

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