高温煤体注气降温及自燃抑制实验研究

发布时间：2018-03-17 08:47

  本文选题：自燃火区　切入点：惰气灭火　出处：《中国安全科学学报》2016年03期 　论文类型：期刊论文

【摘要】：为研究密闭火区高温煤体在注气灭火过程中的降温及自燃抑制效应,将理论分析与实验相结合,分析密闭火区空气中的O2质量分数变化原因,建立O2质量守恒动态模型,得到高温煤体在注气过程中的降温特征及CO衰减规律。结果表明:高温煤体在注气初期出现降温滞后现象;注入CO2气体及N2时,煤样CO消失的温度分别为74和58℃;注入含氧10%的CO2混合气时,CO在38℃消失;注入含氧10%的N2混合气时,CO持续存在;实验证明CO2灭火效果优于N2。
[Abstract]:In order to study the cooling and spontaneous combustion inhibition effect of high temperature coal in the closed fire area during the process of gas injection, combining the theoretical analysis with the experiment, the reason for the change of the mass fraction of O2 in the air in the closed fire area is analyzed, and the dynamic model of mass conservation of O2 mass is established. The cooling characteristics and CO attenuation law of high temperature coal during gas injection are obtained. The results show that the cooling hysteresis occurs in the initial gas injection of high temperature coal, and the temperature of CO vanishing in coal sample is 74 鈩，

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