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针对煤自燃机理以及二氧化碳对煤炭氧化自燃有良好的惰化抑制效果,基于碳酸氢盐既是一种阻化剂,又可以分解出二氧化碳这一特点,提出以碳酸氢盐作为研究对象,以程序升温实验为载体,展开碳酸氢盐抑制煤炭氧化自燃性能的研究分析。通过实验室实验,以测定的煤在纯空气条件下的自燃特性参数为参照,测定煤样混合碳酸氢盐条件下的一氧化碳、氧气等气体浓度、一氧化碳产生率和耗氧速率等参数进行比较,研究碳酸氢盐对煤氧化自燃过程惰化抑制的影响规律。结果证明碳酸氢钠、碳酸氢钾和碳酸氢铵均对煤自燃具有良好的阻化作用,并进行了3种盐的配比试验,认为4∶1∶1适合现场实际。研究结果为碳酸氢盐防灭火技术的开发与应用提供了理论依据。
Aiming at the mechanism of coal spontaneous combustion and the effect of carbon dioxide on spontaneous combustion of coal with good inerting inhibition, based on the fact that bicarbonate is a kind of retarding agent and carbon dioxide can be decomposed, it is proposed to use bicarbonate as the research object, Experiments as a carrier, expand the bicarbonate inhibition of coal spontaneous combustion performance of the research and analysis. Through laboratory experiments, parameters such as carbon monoxide and oxygen gas concentration, carbon monoxide generation rate and oxygen consumption rate were compared by measuring the parameters of spontaneous combustion under pure air conditions, The effect of bicarbonate on the inerting inhibition of spontaneous combustion of coal was studied. The results show that sodium bicarbonate, potassium bicarbonate and ammonium bicarbonate all have a good resistance to the spontaneous combustion of coal, and the three kinds of salt ratio test, that 4: 1: 1 for field practical. The results provide a theoretical basis for the development and application of bicarbonate fire-fighting technology.