A new Nitrogen making device with hollow fiber film for fire control and extinguishment in coal mine is introduced.The basal principles and the properties of PRISM film are also described.

• 介绍一种新型用于煤矿防灭火的中空纤维膜分离制氮装置,对其基本原理进行了阐述并对PRISM膜的特点进行了较为详细的介绍。