Design of coal mine gas drainage concentration control system
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摘要: 针对现有煤矿瓦斯抽放控制采用粗放式控制方法存在瓦斯抽放浓度控制缺失和水环真空泵能耗高等问题，设计了一套煤矿瓦斯抽放浓度控制系统。该系统基于分级调节思想，在控制程序集中控制下，通过瓦斯浓度传感器检测抽采管路中的瓦斯浓度，利用PLC逻辑运算功能计算出瓦斯浓度变化率，并根据瓦斯浓度变化分级调节电动瓦斯调节阀开度和水环真空泵变频电动机转速，以提高抽采瓦斯浓度，从而提高抽采瓦斯利用率。试验结果表明，该控制系统能有效提高抽采瓦斯浓度，瓦斯体积分数可提高3.6%~4.2%，使抽采瓦斯利用率大大提高；且节能效果明显，瓦斯抽放浓度控制后节能效果提高了24%。Abstract: In view of the problem of lack of gas drainage concentration control and the high energy consumption of the water ring vacuum pump in the extensive control method of existing coal mine gas drainage control, a coal mine gas drainage concentration control system was designed. The system is based on the hierarchical adjustment idea, and under the centralized control of the control program, the gas concentration in the extraction pipeline is detected by the gas concentration sensor, the gas concentration change rate is calculated by the PLC logic operation function, and then the opening degree of electric gas control valve and the variable frequency motor speed of water ring vacuum pump are adjusted by grade according to the change of gas concentration to increase the concentration of gas extracted, so as to improve utilization rate of the extraction gas. The test results show that the control system can effectively increase the gas concentration of the extraction, and the gas concentration can be increased by 3.6%-4.2%, which greatly improves the gas utilization rate of the extraction. And the energy saving effect is obvious, the energy saving effect is improved by 24% after the gas drainage concentration control.
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期刊类型引用(11)
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