Experimental study of ZLD-1500 coal mine underground nitrogen cooling unit
The low-temperature cooling unit,composition,typical advantages,and performance parameters of the ZLD-1500 Coal Mine underground nitrogen cooling unit were mainly elaborated.Based on the working conditions of the mining nitrogen production device(ni-trogen flow rate of 1 500 m3/h,nitrogen outlet pressure of 1.0 MPa),the nitrogen outlet pressure,nitrogen outlet temperature,and vari-ous safety protections of the coal mine underground nitrogen cooling unit were tested.The test results show that the unit operates at a ni-trogen flow rate of 1 500 m3/h,the nitrogen outlet temperature can reach-30 ℃,which meets the on-site demand and provides an ef-fective means for the prevention and control of spontaneous combustion in goaf.
mining nitrogen production devicespontaneous combustion firefire prevention and controlnitrogen cooling
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