1.问:10000m3/h空分设备采用分子筛净化、增压膨胀流程。自1995年投产以来,液氩都含有一定量的甲烷(4×10-6左右)。最近多次出现送至贮槽液氩中的甲烷含量更高的现象。检查贮槽,无泄漏。经多方分析,无结果。请问是什么原因?如何处理?(云南昆钢氧气厂一读者问)答:氩的沸点为87· 1. Q: 10000m3 / h air separation plant using molecular sieve purification, pressurized expansion process. Since its commissioning in 1995, liquid argon contains a certain amount of methane (about 4 × 10-6). There have been several recent reports of higher levels of methane in the argon gas in storage tanks. Check the tank, no leakage. After multi-factor analysis, no result. What is the reason? How to deal with? (Yunnan Kunming Oxygen Plant a reader asked) A: The boiling point of argon 87