Simulation of Micron and Submicron Particle Trapping by Single Droplets with Electrostatic Fields
Wet electrostatic precipitators have problems such as uneven water distribution and poor economy in applying ultra-clean particulate matter emissions from coal-fired boilers. Upgrading the droplets in wet dust removal to charged mobile collectors can effectively compensate for these shortcomings. In...
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MDPI AG
2022-11-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/15/22/8487 |
| _version_ | 1797465478264782848 |
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| author | Qiaoqun Sun Wei Zhang Yu Zhang Yaodong Dan Heming Dong Jiwang Wen Qian Du Jianmin Gao |
| author_facet | Qiaoqun Sun Wei Zhang Yu Zhang Yaodong Dan Heming Dong Jiwang Wen Qian Du Jianmin Gao |
| author_sort | Qiaoqun Sun |
| collection | DOAJ |
| description | Wet electrostatic precipitators have problems such as uneven water distribution and poor economy in applying ultra-clean particulate matter emissions from coal-fired boilers. Upgrading the droplets in wet dust removal to charged mobile collectors can effectively compensate for these shortcomings. In this paper, the effects of particle sphericity, particle size, and charge on the capture efficiency of a single droplet for capturing micron and submicron particles are qualitatively studied by simulating the process of particle capture by charged droplets in a turbulent flow field. The simulation results show that the trapping efficiency of charged droplets is positively correlated with the sphericity and the amount of charge. The particle size significantly impacts the capture efficiency, and the increase in size increases the capture efficiency, and the capture efficiency of 5.49 μm particles reaches 100%. The effect of particle movement speed on the capture efficiency needs to be considered in combination with particle size. For micron particles, the capture efficiency is close to 100% when the movement speed is 0.3 m/s and 0.5 m/s. For submicron particles, the aggregation morphology is lower at lower speeds. Simple non-spherical particles have greater capture efficiency. |
| first_indexed | 2024-03-09T18:22:03Z |
| format | Article |
| id | doaj.art-f0c00c187c59426cb1944daa8d87e68e |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T18:22:03Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-f0c00c187c59426cb1944daa8d87e68e2023-11-24T08:13:52ZengMDPI AGEnergies1996-10732022-11-011522848710.3390/en15228487Simulation of Micron and Submicron Particle Trapping by Single Droplets with Electrostatic FieldsQiaoqun Sun0Wei Zhang1Yu Zhang2Yaodong Dan3Heming Dong4Jiwang Wen5Qian Du6Jianmin Gao7School of Aerospace and Construction Engineering, Harbin Engineering University, Harbin 150001, ChinaSchool of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaSchool of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaChina Institute of Special Equipment Inspection, Beijing 100029, ChinaSchool of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaSchool of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaSchool of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaSchool of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaWet electrostatic precipitators have problems such as uneven water distribution and poor economy in applying ultra-clean particulate matter emissions from coal-fired boilers. Upgrading the droplets in wet dust removal to charged mobile collectors can effectively compensate for these shortcomings. In this paper, the effects of particle sphericity, particle size, and charge on the capture efficiency of a single droplet for capturing micron and submicron particles are qualitatively studied by simulating the process of particle capture by charged droplets in a turbulent flow field. The simulation results show that the trapping efficiency of charged droplets is positively correlated with the sphericity and the amount of charge. The particle size significantly impacts the capture efficiency, and the increase in size increases the capture efficiency, and the capture efficiency of 5.49 μm particles reaches 100%. The effect of particle movement speed on the capture efficiency needs to be considered in combination with particle size. For micron particles, the capture efficiency is close to 100% when the movement speed is 0.3 m/s and 0.5 m/s. For submicron particles, the aggregation morphology is lower at lower speeds. Simple non-spherical particles have greater capture efficiency.https://www.mdpi.com/1996-1073/15/22/8487charged dropletssphericitynumerical simulationtrapping efficiency |
| spellingShingle | Qiaoqun Sun Wei Zhang Yu Zhang Yaodong Dan Heming Dong Jiwang Wen Qian Du Jianmin Gao Simulation of Micron and Submicron Particle Trapping by Single Droplets with Electrostatic Fields Energies charged droplets sphericity numerical simulation trapping efficiency |
| title | Simulation of Micron and Submicron Particle Trapping by Single Droplets with Electrostatic Fields |
| title_full | Simulation of Micron and Submicron Particle Trapping by Single Droplets with Electrostatic Fields |
| title_fullStr | Simulation of Micron and Submicron Particle Trapping by Single Droplets with Electrostatic Fields |
| title_full_unstemmed | Simulation of Micron and Submicron Particle Trapping by Single Droplets with Electrostatic Fields |
| title_short | Simulation of Micron and Submicron Particle Trapping by Single Droplets with Electrostatic Fields |
| title_sort | simulation of micron and submicron particle trapping by single droplets with electrostatic fields |
| topic | charged droplets sphericity numerical simulation trapping efficiency |
| url | https://www.mdpi.com/1996-1073/15/22/8487 |
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