深冷法高纯氮工艺在镀锌钢带行业中的节能改造应用

Application of Cryogenic High-purity Nitrogen Process in Energy-saving Reformation in Galvanized Steel Strip Industry

国内镀锌钢带企业中广泛使用N(2)作为保护气,制取方式大多采用变压吸附制取粗氮,再经加氢纯化装置除氧,制取纯度高于99.999%的高纯氮。但是随着设备使用时间的增加,效率逐步降低,能耗不断上升,越来越不适合节能减排需求。嘉兴一大型镀锌钢带企业采用深冷法高纯氮工艺进行节能改造后,取得了良好的效果。

N_(2) is widely used as protective gas in domestic galvanized steel strip enterprises.Most of the preparation methods adopt pressure swing adsorption to produce crude nitrogen,and then deoxidize by hydrogenation purification device to produce high-purity nitrogen with a purity of more than 99.999%.However,as the use time of equipment increases,efficiency gradually decreases,and energy consumption continues to rise,making it less and less suitable for energy conservation and emission reduction requirements.A large-scale galvanized steel strip enterprise in Jiaxing has achieved good results after adopting the cryogenic high-purity nitrogen process for energy-saving transformation.