Liquid-liquid extraction intensification by micro-droplet rotation in a hydrocyclone
Abstract The previous literature reports that using a hydrocyclone as an extractor intensifies the mass transfer and largely reduces the consumption of extractant from 1800–2000 kg h−1 to 30–90 kg h−1. However, the intensification mechanism has not been clear. This paper presents experimental and nu...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2017-06-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-017-02732-x |
| _version_ | 1818429607341195264 |
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| author | Yuan Huang Hua-lin Wang Yu-quan Chen Yan-hong Zhang Qiang Yang Zhi-shan Bai Liang Ma |
| author_facet | Yuan Huang Hua-lin Wang Yu-quan Chen Yan-hong Zhang Qiang Yang Zhi-shan Bai Liang Ma |
| author_sort | Yuan Huang |
| collection | DOAJ |
| description | Abstract The previous literature reports that using a hydrocyclone as an extractor intensifies the mass transfer and largely reduces the consumption of extractant from 1800–2000 kg h−1 to 30–90 kg h−1. However, the intensification mechanism has not been clear. This paper presents experimental and numerical methods to study the multi-scale motion of particles in hydrocyclones. In addition to the usually considered translational behavior, the high-speed rotation of dispersed micro-spheres caused by the anisotropic swirling shear flow is determined. The rotation speeds of the tested micro-spheres are above 1000 rad s−1, which are much larger than the instantaneous rotation speed in isotropic turbulence. Due to the conical structure of a hydrocyclone, the rotation speed maintains stability along the axial direction. Numerical results show that the particle Reynolds number of micro-droplets in a hydrocyclone is equal to that in conventional extractors, but the particles have high rotation speeds of up to 10,000 rad s−1 and long mixing lengths of more than 1000 mm. Both the rotation of micro-droplets along the spiral trajectories and the intense eddy diffusion in a hydrocyclone contribute to the extraction intensification. |
| first_indexed | 2024-12-14T15:20:12Z |
| format | Article |
| id | doaj.art-d2333371e79245c9938bf9c1efeea08c |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-14T15:20:12Z |
| publishDate | 2017-06-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-d2333371e79245c9938bf9c1efeea08c2022-12-21T22:56:12ZengNature PortfolioScientific Reports2045-23222017-06-01711810.1038/s41598-017-02732-xLiquid-liquid extraction intensification by micro-droplet rotation in a hydrocycloneYuan Huang0Hua-lin Wang1Yu-quan Chen2Yan-hong Zhang3Qiang Yang4Zhi-shan Bai5Liang Ma6State-Key Laboratory of Chemical Engineering, East China University of Science and TechnologyState-Key Laboratory of Chemical Engineering, East China University of Science and TechnologyPetroChina Karamay Petrochemical CompanyState-Key Laboratory of Chemical Engineering, East China University of Science and TechnologyState-Key Laboratory of Chemical Engineering, East China University of Science and TechnologyState-Key Laboratory of Chemical Engineering, East China University of Science and TechnologyState-Key Laboratory of Chemical Engineering, East China University of Science and TechnologyAbstract The previous literature reports that using a hydrocyclone as an extractor intensifies the mass transfer and largely reduces the consumption of extractant from 1800–2000 kg h−1 to 30–90 kg h−1. However, the intensification mechanism has not been clear. This paper presents experimental and numerical methods to study the multi-scale motion of particles in hydrocyclones. In addition to the usually considered translational behavior, the high-speed rotation of dispersed micro-spheres caused by the anisotropic swirling shear flow is determined. The rotation speeds of the tested micro-spheres are above 1000 rad s−1, which are much larger than the instantaneous rotation speed in isotropic turbulence. Due to the conical structure of a hydrocyclone, the rotation speed maintains stability along the axial direction. Numerical results show that the particle Reynolds number of micro-droplets in a hydrocyclone is equal to that in conventional extractors, but the particles have high rotation speeds of up to 10,000 rad s−1 and long mixing lengths of more than 1000 mm. Both the rotation of micro-droplets along the spiral trajectories and the intense eddy diffusion in a hydrocyclone contribute to the extraction intensification.https://doi.org/10.1038/s41598-017-02732-x |
| spellingShingle | Yuan Huang Hua-lin Wang Yu-quan Chen Yan-hong Zhang Qiang Yang Zhi-shan Bai Liang Ma Liquid-liquid extraction intensification by micro-droplet rotation in a hydrocyclone Scientific Reports |
| title | Liquid-liquid extraction intensification by micro-droplet rotation in a hydrocyclone |
| title_full | Liquid-liquid extraction intensification by micro-droplet rotation in a hydrocyclone |
| title_fullStr | Liquid-liquid extraction intensification by micro-droplet rotation in a hydrocyclone |
| title_full_unstemmed | Liquid-liquid extraction intensification by micro-droplet rotation in a hydrocyclone |
| title_short | Liquid-liquid extraction intensification by micro-droplet rotation in a hydrocyclone |
| title_sort | liquid liquid extraction intensification by micro droplet rotation in a hydrocyclone |
| url | https://doi.org/10.1038/s41598-017-02732-x |
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