露天煤堆内部升温与水分蒸发阶段特征的模拟研究
发布时间：2018-11-22 06:46
【摘要】：为了研究露天煤堆堆放时内部水分含量的动态变化特征,建立了含水煤堆自燃升温模型,利用数值模拟研究了煤堆在堆放30d内温度和水分含量的变化过程,结果表明:煤堆自迎风面开始向背风面依次形成散热带、升温带和窒息带,含水煤堆自燃温度上升过程依次分为Ⅰ升温,Ⅱ缓慢升温,Ⅲ快速升温。而煤堆内水分含量的变化也依次分为Ⅰ缓慢蒸发,Ⅱ快速蒸发和Ⅲ蒸干三个阶段。依据结论对煤堆内部水分含量的动态过程展开进一步研究,有助于将湿润煤体自燃特征规律的实验成果应用于现场实践。
[Abstract]:In order to study the dynamic change characteristics of internal water content in open-pit coal pile, a model of spontaneous combustion temperature rise of water-bearing coal pile was established, and the variation process of temperature and moisture content of coal pile within 30 days was studied by numerical simulation. The results show that the heating-off zone, heating zone and asphyxiation zone are formed from the upwind surface to the leeward surface of the coal pile, and the rising process of spontaneous combustion temperature of the water-bearing coal pile is divided into 鈪，
本文编号：2348399
[Abstract]:In order to study the dynamic change characteristics of internal water content in open-pit coal pile, a model of spontaneous combustion temperature rise of water-bearing coal pile was established, and the variation process of temperature and moisture content of coal pile within 30 days was studied by numerical simulation. The results show that the heating-off zone, heating zone and asphyxiation zone are formed from the upwind surface to the leeward surface of the coal pile, and the rising process of spontaneous combustion temperature of the water-bearing coal pile is divided into 鈪，
本文编号：2348399
本文链接：https://www.wllwen.com/kejilunwen/anquangongcheng/2348399.html
