核廃棄物処理のスピードアップにはサイズが重要(Size Matters for Speeding Up Nuclear Waste Cleanup)

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革新的な分離技術は、幅広い産業分野での利用が期待される Innovative separation technology may have broad industrial uses

2022-05-12 アメリカ・パシフィック・ノースウェスト国立研究所(PNNL)

核兵器製造に伴う放射性廃棄物の浄化は、困難で時間と費用のかかるプロセスでした。
このたび、パシフィック・ノースウェスト国立研究所(PNNL)の研究者が、浄化に必要な時間と費用を削減できる可能性のあるシンプルな粒子分離技術を設計し、実証しました。この工業規模のアプリケーションは、Chemical Engineering & Processing-Process Intensificationに記載されています。
さらに、この技術は、食品加工、先端製造、エアロゾル科学、超臨界流体、石油・ガス、環境廃棄物処理など、幅広い産業分野での利用が期待されます。

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工業規模でのメソ流体粒子分離 Industrial scale mesofluidic particle separation

Leonard F.Pease,Nathan R.Philips,Jason Serkowski,Timothy G.Veldman ,Michael J.Minette,Carolyn A.Burns
Chemical Engineering and Processing – Process Intensification  Published:13 January 2022
COI:https://doi.org/10.1016/j.cep.2022.108795

Abstract

Here we explore the potential of a mesofluidic separator that fits within industrial piping to remove large aspherical particles out of an abrasive slurry at fast flowrates. Mesofluidic separators have demonstrated separation of spherical particles at flowrates of ∼1 gpm (6.10−5 m3/s). Yet, the performance of these separators at flowrates achievable within industrial piping has not been explored. Here we evaluate the exiting flowrate split, large particle mass fraction, and pressure drop observed in a mesofluidic separator operating in a three-inch (0.076 m) tube carrying an abrasive and modestly non-spherical slurry at flows ranging from 35 to 100 gpm (0.0022–0.0063 m3/s). We find the flow through the separator and pressure drop both increase with flowrate, though the pressure drop remains modest. Only two feet (0.6 m) of inserts removed 97.6 ± 2.1% of large particles for conditions tested. Separation was demonstrated in both vertical and horizontal orientations with the horizontal orientation benefiting marginally from gravitational settling.

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