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Article Contents
Combustion spreading law of loose coal under the condition of lateral wind flow on the surface[J]. Chinese Journal of Engineering. doi: 10.13374/j.issn2095-9389.2022.12.02.002
Citation: Combustion spreading law of loose coal under the condition of lateral wind flow on the surface[J]. Chinese Journal of Engineering. doi: 10.13374/j.issn2095-9389.2022.12.02.002

Combustion spreading law of loose coal under the condition of lateral wind flow on the surface

doi: 10.13374/j.issn2095-9389.2022.12.02.002
  • Available Online: 2023-03-24
  • The property of spontaneous combustion of coal boosts the fire potential in the process of storage and transportation, and hinders the sustainable development of the coal industry. Through the self-built open-vehicle coal transportation simulation experimental device, the internal high-temperature area spread and gas distribution rules of loose coal under the action of wind flows are analyzed. The results show that the cross-wind flow on the surface accelerates significantly the spread speed of coal combustion. Compared with the condition of wind flow of 0 m/s, the high-temperature area spread time is 0.3 times earlier (when the wind flow is 1 m/s) and 0.5 times earlier (when the wind flow is 2 m/s), and the maximum temperature of the high-temperature area increased by 120±20 °C; affected by the cross wind flow on the surface, the spreading path of the high-temperature area drifts in the direction of the wind. When the wind flow is 0 m/s, the time experienced by the rapid decline of the O2 concentration at the key point in the high-temperature area gradually increases with the depth, which will be shortened, as wind flow will intensify coal-oxygen reaction. The research results can provide a reference for coal transportation, coal storage, and coal fire control.

     

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    通訊作者: 陳斌, bchen63@163.com
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      沈陽化工大學材料科學與工程學院 沈陽 110142

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