不同变质程度煤燃烧阶段链烃生成规律

发布时间：2018-01-08 05:22

本文关键词：不同变质程度煤燃烧阶段链烃生成规律　出处：《煤炭学报》2016年07期 　论文类型：期刊论文

【摘要】：为研究封闭火区内不同煤种生成气体组分及变化规律,选取平庄矿褐煤、王营矿气煤、朱仙庄矿焦煤和马堡矿瘦煤为试验煤样,通过热重确定了煤燃烧阶段的温度范围。采用双管电炉自制程序升温燃烧试验对4种不同变质程度的煤进行燃烧,对生成的链烃初现温度、体积分数及氧浓度变化规律进行了分析。研究结果表明:褐煤、气煤、焦煤和瘦煤燃烧阶段温度分别为247~433,279~542,313~574和333~618℃;煤变质程度越高,则其生成链烃气体的体积分数越小且耗氧量越大。当发生火灾事故且封闭火区后,可以综合考虑煤变质程度与火区监测的链烃生成量等因素,并根据链烃气体与温度的变化规律判定封闭火区火势发展状况,为进一步开展灭火奠定基础。
[Abstract]:As the research in closed fire area of different kinds of coal gas generating composition and variation, selection of Pingzhuang lignite mine, Wangying mine coal, coking coal and mine Zhuxianzhuang mine coal Magdeburg as experimental coal samples by thermogravimetric to determine the temperature range of coal combustion stage. Homemade temperature programmed combustion test of 4 different ranks the degree of coal combustion with double furnace temperature on early hydrocarbon generation, volume fraction and oxygen concentration were analyzed. The results show that: lignite, gas coal, coking coal and lean coal combustion temperature were 247~433279~542313~574 and 333~ 618 DEG C; the higher the coal rank, the generation of hydrocarbon gas volume fraction is and the oxygen consumption increases. When the fire accident and closed fire zone, can considering the degree of coal metamorphism and fire monitoring hydrocarbon generation, and according to the variation of hydrocarbon gas and temperature to Set the development of closed fire fire, lay the foundation for the further development of the fire.

【作者单位】：辽宁工程技术大学安全科学与工程学院;辽宁工程技术大学矿山热动力灾害与防治教育部重点实验室;吉林省安全科学技术研究院;
【基金】：国家自然科学基金资助项目(51274115;51274113) 辽宁省教育厅基金资助项目(L2012122)
【分类号】：TD752.2
【正文快照】： 煤自燃是一个复杂的过程,自燃引起的火灾占矿井火灾总数的85%~90%[1-2]。由于煤自然发火的预测工作、封闭火区内燃烧状态主要利用标志性气体来判断,但是由于煤的变质程度不同,产生的标志性气体的初现温度及气体成分、浓度存在很大的差异[3-5]。因此,有必要研究不同变质程度煤

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