介绍了BXN2 95— 5 0 0 /5变压吸附制氮机在煤矿井下防灭火的应用效果 ,说明采用该设备进行注氮灭火比注浆灭火成本要降低许多 ,该设备同时具有科技含量高、造价低、运行成本低、占地面积小、可移动、操作简单等优点 This paper introduces the application effect of BXN2 95-500 / 5 PSA nitrogen generator in coal mine fire prevention and extinguishing, which shows that the cost of injecting nitrogen to fire extinguishing is much lower than that of grouting in fire extinguishing. The equipment also has the advantages of high technology, Low cost, low operating costs, small footprint, removable, simple operation and so on