煤矿利用氮气防灭火已有多年,最早主要利用深冷制氮技术固定厂房内安置机组制取氮气,为就近矿井服务,但因其体积庞大、能耗高、操作维修复杂而被淘汰。随着空分技术的发展,碳分子筛、高分子聚合物膜这些吸附材料的应用,制造出碳分子筛制氮机和膜分离制氮装置。这为煤矿选择氮气 Nitrogen gas has been used in coal mines for many years. The earliest use of deep-freezing nitrogen technology to fix nitrogen in the plant and install it to serve the nearby mines has been phased out because of its large size, high energy consumption and complicated operation and maintenance. With the development of air separation technology, the application of carbon molecular sieve and high molecular polymer film to these adsorbent materials, a carbon molecular sieve nitrogen generator and a membrane nitrogen separation device are manufactured. This chooses nitrogen for the coal mine