JP5739793B2 - 被汚染物を除染して除染チップを回収する方法 - Google Patents
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- Processing Of Solid Wastes (AREA)
- Combined Means For Separation Of Solids (AREA)
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Description
ここで、Re:レイノルズ数(送風の状態)、v:終末沈降速度、ρs:粒子密度、ρ:流体の密度(送風した空気)、g:重力加速度、μ:流体の粘性係数(空気の粘性係数)である。
図2は、本発明の方法の実施の形態1を説明する模式図であり、分画方法として篩分けを適用するものである。まず、放射性物質が吸着した木質瓦礫の伐採樹木からなる被汚染物にセメントミルクを塗工して除染前駆体1を生成し、この除染前駆体1を破砕機2に投入(X1方向)して破砕をおこなう。
図3は、本発明の方法の実施の形態2を説明する模式図であり、分画方法として風簸を適用するものである。この方法形態も、方法の実施の形態1と同様、放射性物質が吸着した木質瓦礫の伐採樹木からなる被汚染物にセメントミルクを塗工して除染前駆体1を生成し、この除染前駆体1を破砕機2に投入(X1方向)して破砕をおこなう。
図4は、本発明の方法の実施の形態3を説明する模式図であり、分画方法として水簸を適用するものである。この方法形態も、方法の実施の形態1,2と同様、放射性物質が吸着した木質瓦礫の伐採樹木からなる被汚染物にセメントミルクを塗工して除染前駆体1を生成し、この除染前駆体1を破砕機2に投入(X1方向)して破砕をおこなう。
図5は、本発明の方法の実施の形態4を説明する模式図であり、分画方法として、磁選機を利用したものである。
図6は、本発明の方法の実施の形態5を説明する模式図であり、分画方法として、図2で示す篩分けと図4で示す水簸を組み合わせたものである。
図7は、本発明の方法の実施の形態6を説明する模式図であり、分画方法として、図3で示す風簸と図4で示す水簸を組み合わせたものである。
図8は、本発明の方法の実施の形態7を説明する模式図であり、分画方法として、図2で示す篩分け用の一方のローラに図5の回転ドラム8を適用し、篩分けと磁選分別を組み合わせたものである。
Claims (4)
- 汚染物質である放射性物質で汚染された被汚染物である木質瓦礫(伐採樹木や津波瓦礫)にセメント系の固化材を塗工し、放射性物質を固化材に吸着もしくは固定して除染前駆体を生成する第1のステップ、
除染前駆体を破砕して、放射性物質が固化材で吸着もしくは固定された汚染固化物と、木質瓦礫の表面から放射性物質が除染されてチップ化された除染チップと、に分画して双方を回収する第2のステップからなる、被汚染物を除染して除染チップを回収する方法。 - 前記セメント系材料に、増粘剤、磁性材料、密度調整材のいずれか一種もしくは複数が添加されている請求項1に記載の被汚染物を除染して除染チップを回収する方法。
- 前記分画が、篩分け、水簸、風簸、磁力選別のうちのいずれか一種、もしくは二種以上の組み合わせからなる請求項1または2に記載の被汚染物を除染して除染チップを回収する方法。
- 回収した前記汚染固化物を再水和反応によって塊状の物質にする請求項1〜3のいずれかに記載の被汚染物を除染して除染チップを回収する方法。
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JP5881043B2 (ja) * | 2012-03-02 | 2016-03-09 | 国際航業株式会社 | 放射性物質回収方法、及び放射性物質回収装置 |
JP6144492B2 (ja) * | 2013-01-07 | 2017-06-07 | 日本国土開発株式会社 | 減容化処理装置及び加熱処理装置 |
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