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空分冷箱保温层内气体中的氧含量如果过高，则会在冷箱内引起气体冷凝现象。本文分析了产生气体冷凝现象的原因，指出了保温层气体冷凝对空分生产和安全的危害，并提出了防范措施。
Air separation Cold box insulation layer of gas in the oxygen content is too high, it will cause condensation in the cold box gas phenomenon. This paper analyzes the causes of gas condensation, points out the harmful effects of gas condensation on the production and safety of air separation, and puts forward some countermeasures.