八字山风井主要风机选型及风量优化研究

Main fan selection and air flow optimization in Bazishan air shaft

主要通风机是矿井通风系统中最核心、最关键的设备,合理的风机型号选择和通风风量的匹配对于保障矿井通风安全、降低通风成本具有重要意义。以镇城底矿八字山回风井为研究对象,采用理论分析和现场实践结合的方法,对风机选型和风量分配进行优化研究。研究表明,八字山回风井通风容易时期,回风井回风量115.4m3/s,通风负压1 870Pa;通风困难时期,回风井回风量169.5m3/s,通风负压2 890Pa;确定选择风机型号为2台DBK54-8No.30防爆对旋轴流式通风机。现场实测各处用风地点,风流稳定,风阻合理,未有瓦斯超限等现象,说明风机选择合理,风量分配满足生产要求。

The main fan of mine ventilation system is the most crucial and the most critical equipment.Rational fan model choice and ventilation air volume are important for the protection of mine ventilation and safety,ventilation cost reduction.Taking Zhenchengdi coal bazishan mine return air shaft as the subject,and combination of theoretical analysis and field practice as method,this paper conducts optimization study of fan selection and air distribution.The studies have shown that during easy ventilation period of Bazishan return air shaft,the amount of return air is 115.4 m^3/s,negative pressure ventilation is1 870 Pa.During difficult ventilation period,return air capacity of return air shaft is 169.5m^3/s,negative pressure ventilation is 2 890 Pa.2sets of DBK54-8No.30 explosionproof counter rotating axial fan are selected as fan model.Through the field measurement,the fan selection is rational and air distribution meets production requirements.