Cryogenic separation device for producing high-purity carbon monoxide and methane

The utility model relates to a cryogenic separation device for producing high-purity carbon monoxide and methane, which comprises a nitrogen refrigeration cycle and a multi-tower rectification for producing high-purity electronic-grade 5N carbon monoxide and methane, the liquid nitrogen washing tower, the argon removal tower, the denitrification tower, the demethanizing tower, the high-purity methane tower reboiler, the high-purity carbon monoxide tower and other rectifying towers are arranged to remove hydrogen, nitrogen, argon, methane, ethane, propane and other impurities in raw material gas, high-purity electronic-grade 5N carbon monoxide and methane are produced, the additional value of a factory is increased, and meanwhile the production cost is reduced. And the purified synthesis ammonia raw material gas is returned to a factory for utilization, so that the factory benefit is increased. 本实用新型涉及一种生产高纯度一氧化碳和甲烷的深冷分离装置，包括了氮气制冷循环和多塔精馏生产高纯度电子级5N一氧化碳和甲烷，其中氮气制冷循环为原料气的深冷分离提供冷量，设有液氮洗涤塔、脱氩塔、脱氮塔、脱甲烷塔、高纯甲烷塔再沸器和高纯一氧