基于微色谱和正压输气技术的煤矿自燃火灾监测系统
Coal mine spontaneous combustion fire monitoring system based on micro gas chromatograph and positive pressure gas delivery technology
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摘要: 随着矿井综放采煤强度的增加，煤自燃倾向性逐渐增大，针对现有煤矿自燃火灾束管色谱监测系统存在气体检测易失真、分析周期长、气样易污染等问题；在传统束管色谱系统基础上，结合微型气相色谱检测与数据网络传输等技术，研制了本安型井下微色谱和束管正压输气泵站，形成了基于微色谱和正压输气技术的煤矿自燃火灾监测系统，系统能够在2~3 min内同时分析出10种气体组分，相对标准偏差≤1.54%，相对精度达到1.0%，检测下限可达到1×10-6。基于微色谱和正压输气技术的煤矿自燃火灾监测系统，提高了煤矿自燃火灾监测系统的可靠性和稳定性，实现了煤自燃火灾的实时准确预测预报，保障了煤矿的安全生产。Abstract: With the increase of coal mining intensity in mines, the tendency of coal to spontaneous combustion increases gradually. Due to the existing coal mine spontaneous combustion fire beam tube chromatography monitoring system has the problems of easy distortion of gas detection, long analysis period and easy pollution of gas sample, it cannot provide an effective scientific basis for the prevention and control of coal mine spontaneous combustion fire. In this paper, based on the traditional beam tube chromatography system, we combine micro gas chromatography detection with data network transmission and other high technologies to develop an intrinsically safe underground micro chromatography and beam tube positive pressure gas delivery pump station, forming a coal mine spontaneous combustion fire monitoring system based on micro chromatography and positive pressure gas delivery technology. The system is capable of analyzing 10 gas components simultaneously within 2 to 3 min with relative standard deviation ≤1.54%, relative accuracy up to 1.0% and lower detection limit up to 1×10-6. It improves the reliability and stability of the coal mine spontaneous combustion fire monitoring system, realizes real-time and accurate prediction of spontaneous combustion fires, and guarantees the safe production of coal mines.
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