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为了研究不同酸碱度的水对煤低温氧化特性的影响,利用自主研发的煤程序升温实验装置对潞宁矿5组煤样进行实验,检测得到不同条件下煤样罐出口的多种指标性气体的浓度;通过计算标准耗氧速率、标准CO及CO2生成速率和甲烷的浓度变化规律来判断水的酸碱度对煤低温氧化特性的影响。结果表明:在不同温度阶段,水的酸碱性对煤低温氧化特性的影响有明显差异,当温度超过160℃时,中性和酸性水环境对煤氧化有一定促进作用;而碱性水环境在温度高于55℃时,一定程度上可以抑制煤氧化。
In order to study the influence of water with different pH on the low temperature oxidation characteristics of coal, five sets of coal samples from Luoning coal mine were tested by using self-developed coal program temperature increasing experimental device. A variety of index gases The effects of water pH on the low-temperature oxidation properties of coal were evaluated by calculating the standard oxygen consumption rate, the standard CO and CO2 generation rates, and the variation of methane concentration. The results show that the influence of acidity and alkalinity of water on the oxidation characteristics of coal at different temperature stages is obviously different. When the temperature exceeds 160 ℃, the neutral and acidic water environment can promote the oxidation of coal, while the alkaline water environment At temperatures above 55 ° C, coal oxidation can be inhibited to some extent.