DEVELOPMENT OF HYDRODYNAMIC SOIL WASH SYSTEM USING VORTEX- BREAKDOWN SOIL WASH, HYDROCYCLONE AND INCLINED SETTLER

  • KATO Tatsuya
    筑波大学大学院 システム情報工学研究科構造エネルギー工学専攻
  • MATSUO Taiki
    筑波大学大学院 システム情報工学研究科構造エネルギー工学専攻
  • SATO Kentaro
    筑波大学大学院 システム情報工学研究科構造エネルギー工学専攻
  • KAMIMURA Takumi
    筑波大学大学院 システム情報工学研究科構造エネルギー工学専攻
  • KYOTOH Harumichi
    筑波大学 システム情報系構造エネルギー工学域

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Other Title
  • 渦崩壊洗浄・サイクロン分級および傾斜沈降を利用した土壌洗浄システムの開発

Abstract

<p> Particle size separation between sand and silt or finer particle is one of the most expected way to reduce the amount of Cesium-contaminated soil made by the accident of Fukushima Daiichi Nuclear Power Plant. We made hydrodynamic soil wash system which is composed with vortex-breakdown nozzle for soil wash, hydrocyclone and inclined settler for particle size separation. In this study, soil wash and size separation ware examined separately.</p><p> In soil wash experiment, it can reduce radioactive material for 24% when suspend sand with oxalate solution 0.05 mol/L and though nozzle for 40 times. In separation experiment, we set 75 µm as a separation diameter. As the result, fine particle rate in coarse were down from about 25% to below 6% when flow ratio of hydrocyclone were about 30 L/min.</p>

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