EFFECT OF SURFACTANT ON RE-ENTRAINMENT PHENOMENA IN AN ELECTROSTATIC PRECIPITATOR

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  • 電気集じん装置における再飛散現象に対する界面活性剤添加の効果
  • デンキ シュウジン ソウチ ニ オケル サイヒサン ゲンショウ ニ タイスル カイメン カッセイザイ テンカ ノ コウカ

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Abstract

The collection efficiency for the particle larger than 1μm decreases due to the re-entrainment on an electrostatic precipitator (ESP) for carbon particles. The re-entrainment means that particles on collecting electrodes refly to gas flow, The re-entrainment may be prevented by increasing the adhesive force between particles and collecting electrodes.<br>In this work, we have investigated the prevention of re-entrainment by spraying water with surfactant into the gas flow. Diesel exhaust particles were used as particulate matter for the experiments. The particle concentration was measured using a scanning electron microscope which is able to count the particle lager than 0.01μm. As a result, collection efficiency was improved by spraying water with surfactant into ESP. The results indicate that re-entrainment and particle agglomeration on collecting electrode are prevented.

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