Removal of deposited metal particles on a horizontal surface by vertical submerged impinging jets

doi:10.1016/j.cjche.2025.02.017

中国化学工程学报 ›› 2025, Vol. 83 ›› Issue (7): 137-147.DOI: 10.1016/j.cjche.2025.02.017

Removal of deposited metal particles on a horizontal surface by vertical submerged impinging jets

Han Peng¹, Xinliang Jia^2,3, Xiaofang Guo^2,3, Yubo Jiang^2,3, Zhipeng Li¹, Zhengming Gao¹, J. J. Derksen⁴

1 State Key Laboratory of Chemical Resource Engineering, School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
2 China Nuclear Power Engineering Co., Ltd., Beijing 100840, China;
3 Innovation Center for Nuclear Facilities Decommissioning and Radioactive Waste Management Technology, Beijing 100840, China;
4 School of Engineering, University of Aberdeen, Aberdeen AB24 3UE, UK

收稿日期:2024-12-18 修回日期:2025-02-08 接受日期:2025-02-20 出版日期:2025-07-28 发布日期:2025-07-28
通讯作者: Zhipeng Li,E-mail:lizp@mail.buct.edu.cn;Zhengming Gao,E-mail:gaozm@mail.buct.edu.cn
基金资助:
This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

Removal of deposited metal particles on a horizontal surface by vertical submerged impinging jets

Han Peng¹, Xinliang Jia^2,3, Xiaofang Guo^2,3, Yubo Jiang^2,3, Zhipeng Li¹, Zhengming Gao¹, J. J. Derksen⁴

1 State Key Laboratory of Chemical Resource Engineering, School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
2 China Nuclear Power Engineering Co., Ltd., Beijing 100840, China;
3 Innovation Center for Nuclear Facilities Decommissioning and Radioactive Waste Management Technology, Beijing 100840, China;
4 School of Engineering, University of Aberdeen, Aberdeen AB24 3UE, UK

Received:2024-12-18 Revised:2025-02-08 Accepted:2025-02-20 Online:2025-07-28 Published:2025-07-28
Contact: Zhipeng Li,E-mail:lizp@mail.buct.edu.cn;Zhengming Gao,E-mail:gaozm@mail.buct.edu.cn
Supported by:
This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

摘要/Abstract

摘要： Jet agitation is known as a maintenance-free stirring technique for nuclear wastewater treatment and demonstrates great potential in transport of radioactive particles. Removal processes of horizontal sediment beds driven by impinging jets were experimentally investigated using image capture and processing technique. The beds were composed of heavy fine particles with particle density ranging from 3700 to 12600 kg·m^-3 and particle diameter from 5 to 100 mm. The jet Reynolds number varied between 4300 and 9600. The single-phase large eddy simulation method was used for calculating both jet flow characteristics and wall shear stresses. The effects of jet strength, particle density, particle diameter, and bed thickness on bed mobility in terms of the critical Shields numbers were considered. Specifically, the critical Shields number was found to be intricately related to properties of particles, and independent of jet intensity. A new Shields number curve for stainless-steel particles was found, and a model was proposed to predict the transport rate of thin beds, with R² = 0.96.

关键词: Particle removal, Impinging jet, Shields number, Computational fluid dynamics, Two-phase flow, Transport

Abstract: Jet agitation is known as a maintenance-free stirring technique for nuclear wastewater treatment and demonstrates great potential in transport of radioactive particles. Removal processes of horizontal sediment beds driven by impinging jets were experimentally investigated using image capture and processing technique. The beds were composed of heavy fine particles with particle density ranging from 3700 to 12600 kg·m^-3 and particle diameter from 5 to 100 mm. The jet Reynolds number varied between 4300 and 9600. The single-phase large eddy simulation method was used for calculating both jet flow characteristics and wall shear stresses. The effects of jet strength, particle density, particle diameter, and bed thickness on bed mobility in terms of the critical Shields numbers were considered. Specifically, the critical Shields number was found to be intricately related to properties of particles, and independent of jet intensity. A new Shields number curve for stainless-steel particles was found, and a model was proposed to predict the transport rate of thin beds, with R² = 0.96.

Key words: Particle removal, Impinging jet, Shields number, Computational fluid dynamics, Two-phase flow, Transport

Han Peng, Xinliang Jia, Xiaofang Guo, Yubo Jiang, Zhipeng Li, Zhengming Gao, J. J. Derksen. Removal of deposited metal particles on a horizontal surface by vertical submerged impinging jets[J]. 中国化学工程学报, 2025, 83(7): 137-147.

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Removal of deposited metal particles on a horizontal surface by vertical submerged impinging jets

Removal of deposited metal particles on a horizontal surface by vertical submerged impinging jets

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