随着工业的发展,氮气或惰性气体的用途越来越广泛。近年来全国各冶金企业使用氮气或惰性气体也逐步增加,因氮气或惰性气体窒息死亡屡见不鲜,因此预防氮气或惰性气体窒息事故的发生不容忽视。人们在氧含量低于18%的空气中作业就有发生缺氧窒息的危险。当环境空气中氮气或惰性气体浓度增加使氧含量降到16%以下时,很容易发生死亡事故。为防止氮气或惰性 With the development of industry, the use of nitrogen or inert gas is more and more widely used. In recent years, all metallurgical enterprises in the country have gradually increased the use of nitrogen or inert gas. As a result of nitrogen or inert gas suffocation, deaths are not uncommon, so the prevention of nitrogen or inert gas suffocation accidents can not be ignored. People in the oxygen content of less than 18% of the air operations have the risk of hypoxia asphyxiation. Deaths can easily occur when the concentration of nitrogen or inert gas in the ambient air increases so that the oxygen content falls below 16%. To prevent nitrogen or inert