冬季进风井筒风流紊乱防控技术

发布时间：2018-07-28 19:44

【摘要】：针对我国煤矿冬季进风井筒容易出现风流紊乱且难于及时预防、调控的问题,结合矿井实例,对进风主井风流紊乱控制方法进行了分析,确定了通过调节供暖热风量从而减小井筒间自然风压的技术方法,并研究开发了一套能够便捷、有效防控风流紊乱的技术系统。系统通过合理布置传感器,对进风井筒风温、风速进行实时监测的同时,采用变频控制器和PLC对热风机组风机转速和电控阀门状态进行调节,并利用工业环网和工控机实现远程监控,进而实现便捷调节井筒热风量、防控其风流紊乱的目的。现场试验效果表明,当进风井筒风量明显减小时,利用该系统进行调控,在30 min内即可改变进风风流状态,提高进风井筒供暖效果的同时,有力保障了通风系统的风流稳定性。
[Abstract]:In view of the problems of air flow disorder and difficulty to prevent and control air flow in coal mine in winter, combined with mine example, the control method of air flow disorder in main air inlet shaft is analyzed. The technical method of reducing the natural wind pressure between boreholes by adjusting the heating hot air volume is determined, and a set of technical system which can be convenient and effective to prevent and control the disturbance of air flow is developed. When the air temperature and wind speed of inlet shaft are monitored in real time, the system adopts frequency conversion controller and PLC to adjust the speed of fan and the state of electric control valve of hot air unit. The industrial loop network and industrial control computer are used to realize remote monitoring and control, thus the purpose of conveniently regulating the hot air volume in the wellbore and preventing and controlling the disturbance of the air flow is realized. The field test results show that when the air volume of the inlet shaft is obviously reduced, the air flow state can be changed within 30 min by using the system, and the air flow stability of the ventilation system can be guaranteed at the same time as the heating effect of the inlet air shaft is improved.
【作者单位】：中国矿业大学(北京)资源与安全工程学院;中国矿业大学(北京)煤炭资源与安全开采国家重点实验室;山西焦煤集团投资有限责任公司;
【分类号】：TD726

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