Drop Size Distribution Spectra in Mixing Vessel for Extraction of Fuel

用于提取燃料的混合容器中的液滴尺寸分布谱

• 批准号: 03680196
• 负责人: NISHIKAWA Masabumi
• 金额: $ 1.15万
• 依托单位: KYUSYU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03680196/
• 关键词: Extraction; Drop Size; Mixer; Normal Distribution; Log-Normal Distribution; 空気まき込み; 再処理; 湿式法; ミキサ-セトラ-; 液滴径分散スペクトル

In nuclear fuel reprocessing,the performance of mixer-settlers or pulsation columns should be analyzed from the spectra of drop size distribution for optimization of uranium or plutonium extraction because mass transfer behavior from dispersed drops to mixing liquid is largely dependent on the drop size.The drop size in a mixing vessel is dependent on the micro-and macro-scale turblent motions and flow patterns in the vessel.Accordingly,introduction of aeration can change the drop size distribution because the aeration changes the flow patterns and the turblent motions in the mixing vessel.Experimental results in this study show that both small and large size drops in distribution increase with aeration to decrease the fraction of the intermediate size drops.The volumetric drop size distribution curve is represented by a combination of three normal distribution curves though the number distribution curve is represented by a combination of two log-normal distribution curves.Effect of energy dissipation rate by agitation or that of volume fraction of dispersed phase on the Sauter mean drop size shows that coalescence phenomena are dominating in the mixing vessel with aeration.

在核燃料后处理中，应从滴剂大小分布的光谱中分析混合剂 - 分配器或脉动柱的性能，以优化铀或p李子的提取，因为从分散的滴剂到混合液体的传质行为在很大程度上取决于滴液尺寸。混合容器中的滴尺寸取决于容器中的微尺度和宏观尺寸的苏联运动和流动模式。根据曝气的引入可以改变液滴的分布船只的经验结果在这项研究中表明，小尺寸和大尺寸的分布都随曝气的增加而增加，以减少中间尺寸下降的比例。体积滴尺寸分布曲线由三个正常分布曲线的组合表示，尽管数量分布曲线由两个对数正态分布曲线的组合表示。通过搅拌或在空事者平均滴度上分散相的体积分数的效果效果表明，合并现象在充气中占主导地位。