Study on microscopic mechanism of wetting anthracite by charged droplets
As a new type of high-efficiency dust removal method, water-mist charge-enhanced dust reduction technology has been shown to significantly improve the efficiency of coal dust management in comparison with traditional wet spray dust reduction technology. However, the microscopic mechanism of the tech...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Safety in Coal Mines
2025-08-01
|
| Series: | Meikuang Anquan |
| Subjects: | |
| Online Access: | https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20250227 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849236267319951360 |
|---|---|
| author | Hongjie ZHANG Yuming ZHAO Shaocheng GE Weizhi ZHAO |
| author_facet | Hongjie ZHANG Yuming ZHAO Shaocheng GE Weizhi ZHAO |
| author_sort | Hongjie ZHANG |
| collection | DOAJ |
| description | As a new type of high-efficiency dust removal method, water-mist charge-enhanced dust reduction technology has been shown to significantly improve the efficiency of coal dust management in comparison with traditional wet spray dust reduction technology. However, the microscopic mechanism of the technology on coal dust capture and wetting has not yet been thoroughly explained. In this study, a multi-scale approach was adopted to experimentally investigate the wetting performance of charged droplets and the electrostatic agglomeration of anthracite dust. Secondly, the molecular simulation method was employed to investigate the interaction mechanism between the charged droplets and anthracite from the dimensions of electronic structure calculation at the quantum mechanical level and conformational evolution at the molecular dynamics level. The findings indicate that the charged solutions exhibited superior wetting performance on coal dust, with the contact angle between charged droplets and coal dust showing an overall downward trend as the charging voltage increased, and the minimum contact angle and optimal wetting performance were achieved at −24 kV charging voltage. The particle size distribution of coal dust after charged spray sedimentation showed significant enlargement, with distribution trends shifting towards 100 μm, indicating the existence of electrostatic agglomeration of coal dust by charged droplets. Compared to ordinary water molecules, charged water molecules demonstrated enhanced polarity, presented uniformly negative electrostatic potential distributions, and exhibited greater electrostatic potential differences with anthracite molecules, suggesting stronger electrostatic interactions. Charged water molecules displayed higher adsorption density on anthracite surfaces, formed more compact molecular layers, and generated increased hydrogen bond quantities within the system. Furthermore, the energy composition analysis confirmed that electrostatic effect is the dominant factor in the interaction between charged water molecules and anthracite molecules. |
| format | Article |
| id | doaj-art-d9c04e0ddfcf4e86a16fc5490daa0b71 |
| institution | Kabale University |
| issn | 1003-496X |
| language | zho |
| publishDate | 2025-08-01 |
| publisher | Editorial Office of Safety in Coal Mines |
| record_format | Article |
| series | Meikuang Anquan |
| spelling | doaj-art-d9c04e0ddfcf4e86a16fc5490daa0b712025-08-20T04:02:22ZzhoEditorial Office of Safety in Coal MinesMeikuang Anquan1003-496X2025-08-01568414710.13347/j.cnki.mkaq.20250227gMKAQ20250227Study on microscopic mechanism of wetting anthracite by charged dropletsHongjie ZHANG0Yuming ZHAO1Shaocheng GE2Weizhi ZHAO3China Coal Technology and Engineering Group Shanxi Tiandi Wangpo Coal Industry Co., Ltd., Jincheng 048000, ChinaChina Coal Technology & Engineering Group Chongqing Research Institute Co., Ltd., Chongqing 400039, ChinaCollege of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaAs a new type of high-efficiency dust removal method, water-mist charge-enhanced dust reduction technology has been shown to significantly improve the efficiency of coal dust management in comparison with traditional wet spray dust reduction technology. However, the microscopic mechanism of the technology on coal dust capture and wetting has not yet been thoroughly explained. In this study, a multi-scale approach was adopted to experimentally investigate the wetting performance of charged droplets and the electrostatic agglomeration of anthracite dust. Secondly, the molecular simulation method was employed to investigate the interaction mechanism between the charged droplets and anthracite from the dimensions of electronic structure calculation at the quantum mechanical level and conformational evolution at the molecular dynamics level. The findings indicate that the charged solutions exhibited superior wetting performance on coal dust, with the contact angle between charged droplets and coal dust showing an overall downward trend as the charging voltage increased, and the minimum contact angle and optimal wetting performance were achieved at −24 kV charging voltage. The particle size distribution of coal dust after charged spray sedimentation showed significant enlargement, with distribution trends shifting towards 100 μm, indicating the existence of electrostatic agglomeration of coal dust by charged droplets. Compared to ordinary water molecules, charged water molecules demonstrated enhanced polarity, presented uniformly negative electrostatic potential distributions, and exhibited greater electrostatic potential differences with anthracite molecules, suggesting stronger electrostatic interactions. Charged water molecules displayed higher adsorption density on anthracite surfaces, formed more compact molecular layers, and generated increased hydrogen bond quantities within the system. Furthermore, the energy composition analysis confirmed that electrostatic effect is the dominant factor in the interaction between charged water molecules and anthracite molecules.https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20250227charged dropletenhanced wettingelectrostatic attractionmolecular polaritymicroscopic interaction |
| spellingShingle | Hongjie ZHANG Yuming ZHAO Shaocheng GE Weizhi ZHAO Study on microscopic mechanism of wetting anthracite by charged droplets Meikuang Anquan charged droplet enhanced wetting electrostatic attraction molecular polarity microscopic interaction |
| title | Study on microscopic mechanism of wetting anthracite by charged droplets |
| title_full | Study on microscopic mechanism of wetting anthracite by charged droplets |
| title_fullStr | Study on microscopic mechanism of wetting anthracite by charged droplets |
| title_full_unstemmed | Study on microscopic mechanism of wetting anthracite by charged droplets |
| title_short | Study on microscopic mechanism of wetting anthracite by charged droplets |
| title_sort | study on microscopic mechanism of wetting anthracite by charged droplets |
| topic | charged droplet enhanced wetting electrostatic attraction molecular polarity microscopic interaction |
| url | https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20250227 |
| work_keys_str_mv | AT hongjiezhang studyonmicroscopicmechanismofwettinganthracitebychargeddroplets AT yumingzhao studyonmicroscopicmechanismofwettinganthracitebychargeddroplets AT shaochengge studyonmicroscopicmechanismofwettinganthracitebychargeddroplets AT weizhizhao studyonmicroscopicmechanismofwettinganthracitebychargeddroplets |