在应力-热量-气体相互作用下,颗粒煤的氧化和自燃特性
Jiangkun Chao1, Shuo Wei2, Ling Shen1
1School of Safety & Science Engineering, Henan Polytechnic University, Jiaozuo 454003, China; Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization, Henan Polytechnic University, Jiaozuo 454003, China.
The Science of the total environment
|July 9, 2024
概括
煤炭自燃 (CSC) 的风险随着高空气泄漏和低压力而增加. 了解这些复杂的相互作用对于防止地下火灾至关重要.
科学领域:
- 地质科学 地质科学
- 采矿工程 采矿工程 采矿工程
- 化学工程是化学工程的重要组成部分.
背景情况:
- 煤炭自燃 (CSC) 是采矿中的一个重大危险,通常受到复杂的下井条件的影响.
- 现有的研究不足以解决压力,热量和气体对CSC的综合影响,限制了全面的风险评估.
- 在各种环境因素下,在颗粒性煤中表征氧化和自燃对于安全至关重要.
研究的目的:
- 调查煤炭自燃压力-热量-气体相互作用的内在机制.
- 在这些组合条件下分析衍生气体和热力学参数的变化规则.
- 确定影响颗粒性煤中CSC风险增加的关键因素.
主要方法:
- 使用温度编程气体染色仪 (TP-GC) 带连线的仪器进行气体分析.
- 使用C600高精度微热量计来测量热力学参数.
- 在不同压力,热量和空气泄漏 (AL) 率下模拟和分析了煤炭氧化和加热过程.
主要成果:
- 衍生气体度呈现出""形趋势,空气泄漏量增加,达到150毫升/分钟的峰值.
- 热释放强度和总热释放显示分阶段变化,达到最大的150毫升/分钟AL.
- 较高的空气泄漏和较低的应力被确定为促进煤炭自燃风险的条件.
结论:
- 应力-热-气体相互作用显著影响CSC风险,特别是在高空气泄漏率的情况下.
- 增加压力通常会抑制煤氧反应,减少气体生成和热释放.
- 颗粒煤在高空气泄漏和低压力条件下最容易发生自燃.
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