Ignition temperature and explosion pressure of suspended coal dust cloud under different conditions and suppression characteristics
Abstract The ignition and explosion processes of suspended coal dust clouds and their suppression characteristics are important aspects of dust prevention and control. To understand the ignition temperature and explosion pressure of coal dust clouds, as well as the inhibitory effect of explosion sup...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2023-09-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-42117-x |
| _version_ | 1797453182234787840 |
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| author | Tianqi Liu Xiangzhen Mu Xingchen Wu Ruiheng Jia Jining Xie Zhongyi Gao |
| author_facet | Tianqi Liu Xiangzhen Mu Xingchen Wu Ruiheng Jia Jining Xie Zhongyi Gao |
| author_sort | Tianqi Liu |
| collection | DOAJ |
| description | Abstract The ignition and explosion processes of suspended coal dust clouds and their suppression characteristics are important aspects of dust prevention and control. To understand the ignition temperature and explosion pressure of coal dust clouds, as well as the inhibitory effect of explosion suppressants, experimental tests are conducted. The study found that during the ignition process of coal dust clouds, the optimal dust spray pressure is 20 kPa, because coal dust clouds are more likely to ignite under this condition. When the mass concentration of coal dust cloud is 500 g m−3, the maximum pressure and maximum pressure rise rate are both the highest. When Al(OH)3 is mixed with coal dust and the mass percentage is 60%, the coal dust cloud can still be ignited. When KH2PO4 is mixed with coal dust, the upper limit of the test temperature is reached when the percentage of mixture is 55%. When NH4H2PO4 is mixed with coal dust and the mass percentage is greater than 40%, the coal dust cloud can’t be ignited anymore. The suppression effect of mixing Al(OH)3 and NH4H2PO4 is not as good as that of mixing KH2PO4 and NH4H2PO4. |
| first_indexed | 2024-03-09T15:18:10Z |
| format | Article |
| id | doaj.art-08a22a0552ea4edc9c749f840a15327b |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-09T15:18:10Z |
| publishDate | 2023-09-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-08a22a0552ea4edc9c749f840a15327b2023-11-26T12:55:25ZengNature PortfolioScientific Reports2045-23222023-09-0113111010.1038/s41598-023-42117-xIgnition temperature and explosion pressure of suspended coal dust cloud under different conditions and suppression characteristicsTianqi Liu0Xiangzhen Mu1Xingchen Wu2Ruiheng Jia3Jining Xie4Zhongyi Gao5School of Safety Engineering, Shenyang Aerospace UniversitySchool of Safety Engineering, Shenyang Aerospace UniversitySchool of Safety Engineering, Shenyang Aerospace UniversitySchool of Safety Engineering, Shenyang Aerospace UniversitySchool of Safety Engineering, Shenyang Aerospace UniversitySchool of Safety Engineering, Shenyang Aerospace UniversityAbstract The ignition and explosion processes of suspended coal dust clouds and their suppression characteristics are important aspects of dust prevention and control. To understand the ignition temperature and explosion pressure of coal dust clouds, as well as the inhibitory effect of explosion suppressants, experimental tests are conducted. The study found that during the ignition process of coal dust clouds, the optimal dust spray pressure is 20 kPa, because coal dust clouds are more likely to ignite under this condition. When the mass concentration of coal dust cloud is 500 g m−3, the maximum pressure and maximum pressure rise rate are both the highest. When Al(OH)3 is mixed with coal dust and the mass percentage is 60%, the coal dust cloud can still be ignited. When KH2PO4 is mixed with coal dust, the upper limit of the test temperature is reached when the percentage of mixture is 55%. When NH4H2PO4 is mixed with coal dust and the mass percentage is greater than 40%, the coal dust cloud can’t be ignited anymore. The suppression effect of mixing Al(OH)3 and NH4H2PO4 is not as good as that of mixing KH2PO4 and NH4H2PO4.https://doi.org/10.1038/s41598-023-42117-x |
| spellingShingle | Tianqi Liu Xiangzhen Mu Xingchen Wu Ruiheng Jia Jining Xie Zhongyi Gao Ignition temperature and explosion pressure of suspended coal dust cloud under different conditions and suppression characteristics Scientific Reports |
| title | Ignition temperature and explosion pressure of suspended coal dust cloud under different conditions and suppression characteristics |
| title_full | Ignition temperature and explosion pressure of suspended coal dust cloud under different conditions and suppression characteristics |
| title_fullStr | Ignition temperature and explosion pressure of suspended coal dust cloud under different conditions and suppression characteristics |
| title_full_unstemmed | Ignition temperature and explosion pressure of suspended coal dust cloud under different conditions and suppression characteristics |
| title_short | Ignition temperature and explosion pressure of suspended coal dust cloud under different conditions and suppression characteristics |
| title_sort | ignition temperature and explosion pressure of suspended coal dust cloud under different conditions and suppression characteristics |
| url | https://doi.org/10.1038/s41598-023-42117-x |
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