Study on suppression effect and mechanisms of phosphorus-containing recycling substance on flame propagation of methane/coal dust composite explosion
Magnesium ammonium phosphate (MgNH4PO4·6H2O) is a phosphorus-containing blockage commonly found in sewage treatment pipelines. In order to study its suppression effect on the methane/coal dust composite explosion, magnesium ammonium phosphate was subjected to mechanized chemical modification to prep...
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Editorial Office of Safety in Coal Mines
2025-03-01
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| Series: | Meikuang Anquan |
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| Online Access: | https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20231627 |
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| author | Li LIU Xiangbao MENG Jihe CHEN Yansong ZHANG Tong WANG Lei SHI Yang WU Qiyan WU |
| author_facet | Li LIU Xiangbao MENG Jihe CHEN Yansong ZHANG Tong WANG Lei SHI Yang WU Qiyan WU |
| author_sort | Li LIU |
| collection | DOAJ |
| description | Magnesium ammonium phosphate (MgNH4PO4·6H2O) is a phosphorus-containing blockage commonly found in sewage treatment pipelines. In order to study its suppression effect on the methane/coal dust composite explosion, magnesium ammonium phosphate was subjected to mechanized chemical modification to prepare well-dispersed magnesium ammonium phosphate powder (S-MAP). The improved Hartmann flame propagation system was used to investigate the suppression effect of different mass fractions of S-MAP(20%, 40%, 60%, 80%）on the flame propagation of the methane/coal dust composite explosion. The experimental results indicate that the addition of S-MAP can significantly reduce flame propagation speed, height, and brightness. With the increase of S-MAP addition ratio, the flame propagation height decreased from over 900 mm to 134 mm, and the average flame propagation speed decreased from 8.76 mm/ms to 0.51 mm/s. When the S-MAP addition ratio reached 80%, the entire flame propagation process only presented small flames, which could suppress the propagation of flames; in terms of explosion suppression mechanism, S-MAP decomposition can absorb a large amount of heat, thereby exerting a cooling effect. The intermediate produced by thermal decomposition of S-MAP can adsorb explosion free radicals to block the explosion chain reaction, thereby exerting the effect of adsorbing explosive free radicals. The thermal decomposition products of S-MAP can dilute the concentration of oxygen and combustible gases in the explosion space, and at the same time, the thermal decomposition products can adsorb on the surface of coal dust to isolate the transfer of oxygen and heat, thereby exerting a suffocating effect. The coupling effect of the three suppresses the propagation process of methane/coal dust explosion flames. |
| format | Article |
| id | doaj-art-5b91b1d6d86649e2b707e2f7a42e03db |
| institution | Kabale University |
| issn | 1003-496X |
| language | zho |
| publishDate | 2025-03-01 |
| publisher | Editorial Office of Safety in Coal Mines |
| record_format | Article |
| series | Meikuang Anquan |
| spelling | doaj-art-5b91b1d6d86649e2b707e2f7a42e03db2025-08-20T03:42:40ZzhoEditorial Office of Safety in Coal MinesMeikuang Anquan1003-496X2025-03-01563758310.13347/j.cnki.mkaq.20231627lyMKAQ20231627Study on suppression effect and mechanisms of phosphorus-containing recycling substance on flame propagation of methane/coal dust composite explosionLi LIU0Xiangbao MENG1Jihe CHEN2Yansong ZHANG3Tong WANG4Lei SHI5Yang WU6Qiyan WU7College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaChina Academy of Safety Science and Technology, Beijing 100012, ChinaCollege of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaMagnesium ammonium phosphate (MgNH4PO4·6H2O) is a phosphorus-containing blockage commonly found in sewage treatment pipelines. In order to study its suppression effect on the methane/coal dust composite explosion, magnesium ammonium phosphate was subjected to mechanized chemical modification to prepare well-dispersed magnesium ammonium phosphate powder (S-MAP). The improved Hartmann flame propagation system was used to investigate the suppression effect of different mass fractions of S-MAP(20%, 40%, 60%, 80%）on the flame propagation of the methane/coal dust composite explosion. The experimental results indicate that the addition of S-MAP can significantly reduce flame propagation speed, height, and brightness. With the increase of S-MAP addition ratio, the flame propagation height decreased from over 900 mm to 134 mm, and the average flame propagation speed decreased from 8.76 mm/ms to 0.51 mm/s. When the S-MAP addition ratio reached 80%, the entire flame propagation process only presented small flames, which could suppress the propagation of flames; in terms of explosion suppression mechanism, S-MAP decomposition can absorb a large amount of heat, thereby exerting a cooling effect. The intermediate produced by thermal decomposition of S-MAP can adsorb explosion free radicals to block the explosion chain reaction, thereby exerting the effect of adsorbing explosive free radicals. The thermal decomposition products of S-MAP can dilute the concentration of oxygen and combustible gases in the explosion space, and at the same time, the thermal decomposition products can adsorb on the surface of coal dust to isolate the transfer of oxygen and heat, thereby exerting a suffocating effect. The coupling effect of the three suppresses the propagation process of methane/coal dust explosion flames.https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20231627magnesium ammonium phosphatesilicamethane/coal dust composite explosionflame propagationsuppression mechanism |
| spellingShingle | Li LIU Xiangbao MENG Jihe CHEN Yansong ZHANG Tong WANG Lei SHI Yang WU Qiyan WU Study on suppression effect and mechanisms of phosphorus-containing recycling substance on flame propagation of methane/coal dust composite explosion Meikuang Anquan magnesium ammonium phosphate silica methane/coal dust composite explosion flame propagation suppression mechanism |
| title | Study on suppression effect and mechanisms of phosphorus-containing recycling substance on flame propagation of methane/coal dust composite explosion |
| title_full | Study on suppression effect and mechanisms of phosphorus-containing recycling substance on flame propagation of methane/coal dust composite explosion |
| title_fullStr | Study on suppression effect and mechanisms of phosphorus-containing recycling substance on flame propagation of methane/coal dust composite explosion |
| title_full_unstemmed | Study on suppression effect and mechanisms of phosphorus-containing recycling substance on flame propagation of methane/coal dust composite explosion |
| title_short | Study on suppression effect and mechanisms of phosphorus-containing recycling substance on flame propagation of methane/coal dust composite explosion |
| title_sort | study on suppression effect and mechanisms of phosphorus containing recycling substance on flame propagation of methane coal dust composite explosion |
| topic | magnesium ammonium phosphate silica methane/coal dust composite explosion flame propagation suppression mechanism |
| url | https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20231627 |
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