在超声波辅助的电凝干预中,流场调节和沉积物颗粒聚机制
Yifeng Liu1, Wenwen Bai1, Jiahua Wei2
1School of Civil Engineering and Water Resources/Laboratory of Ecological Protection and High Quality Development in the Upper Yellow River/Key Laboratory of Water Ecology Remediation and Protection at Headwater Regions of Big Rivers, Ministry of Water Resources/State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, China.
Ultrasonics sonochemistry
|September 14, 2025
概括
超声辅助电凝疗法 (US-EC) 通过使用低频超声来破碎颗粒和高电流密度来促进聚合来增强 flokculation. 这种声电合优化了流场,以有效地去除沉积物.
科学领域:
- 环境工程 环境工程
- 水处理技术水处理技术
- 合体和表面化学
背景情况:
- 超声波辅助电凝疗法 (US-EC) 显示了改善花过程的潜力.
- 美国-欧盟的流场演变和粒子大小控制的基本机制仍然不完全理解.
- 声电合对悬浮沉积物的花效应需要进一步研究.
研究的目的:
- 建立一个声电合观测平台,用于研究悬浮沉积物积.
- 研究超声波频率和电流密度对流场特征和粒子大小的影响.
- 阐明美国 - 欧盟在粒子碎片化和聚合中的协同机制.
主要方法:
- 开发一个声电合观测平台.
- 利用粒子图像速度测量 (PIV) 来观察气体-固体和混合相位运动.
- 系统地探索不同的超声波频率 (例如28 kHz) 和电流密度 (例如40 A/m2).
主要成果:
- 低频超声波 (28 kHz) 有效地粉碎颗粒并增强流体干扰.
- 高电流密度 (40 A/m2) 通过降低 Zeta 潜力来加速聚合.
- 最佳条件 (28 kHz + 40 A/m2) 实现了适度的流速和均的旋转,平衡干扰和稳定性,将平均颗粒大小从18.89微米增加到60.98微米,沉率为87.96%.
结论:
- 美国 - 欧盟过程遵循三个阶段的路径:超声波诱导的碎片化,EC驱动的聚合和重力诱导的沉积.
- 流速和旋流协同调节粒子迁移,碰撞效率和稳定性.
- 泽塔潜能控制粒子聚合率,这些机制协同增强处理性能.
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