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通过对煤碳储存环境特点的分析,利用FLUENT软件,选择太阳辐射加载模型、化学反应模型和P-1辐射3个基本模型对70 mm厚度粉煤覆盖下煤堆内的温度分布、氧气体积分数分布变化规律进行数值模拟。模拟结果表明:该模型可以有效预测煤堆自燃的倾向性,对覆盖70 cm厚度粉煤煤堆的温度分布和氧气体积分数分布模拟结果分析可以看出,粉煤覆盖可以一定程度上抑制煤堆内的低温氧化反应,防止煤堆自燃,因此粉煤覆盖是一种新型的防治煤堆自燃的方法。
Through the analysis of the characteristics of coal storage environment, using FLUENT software, three basic models of solar radiation loading model, chemical reaction model and P-1 radiation were selected to study the temperature distribution, oxygen volume fraction Distribution changes in the law of numerical simulation. The simulation results show that the model can effectively predict the tendency of spontaneous combustion of coal piles. Analysis of simulation results of temperature distribution and oxygen volume fraction distribution covering a 70-cm-thick coal-fired pluton shows that the coal-dust coverage can restrain the piles Within the low-temperature oxidation reaction to prevent coal spontaneous combustion, so coal coverage is a new type of coal spontaneous combustion prevention methods.