An industrial-grade method and device for producing 18o isotopes by cryogenic rectification

Abstract

The invention discloses a method and device for industrial production of 18 O isotopes by low-temperature rectification. The device comprises an air purifying system, an oxygen 18 isotope rectifying system and a filling system connected in sequence, and further comprises an electric control system and a vacuumizing system connected with the three systems; the oxygen 18 isotope rectifying system comprises regular filling towers serially connected step by step in sequence, and random filling towers serially connected step by step; and more than one sub towers are arranged among all the regular filling towers in parallel. The device has the following beneficial effects: through serial connection of multiple grades of towers, oxygen 18 isotopes are gradually concentrated at the bottoms of rectifying towers; the previous several grades of rectifying towers are filled with efficient regular fillers, so that the raw material treatment quantity is high, and the isotopes are suitable for industrial scale production; the later several stages of rectifying towers are filled with random fillers, so that the extracting rate of the whole set of devices is increased; and through a system evaporation nitrogen heat exchanger, the cold quantity carried by evaporation nitrogen of rectifying tower condensers is effectively used, so that the system energy consumption level is kept at a lower level.

Description

technical field [0001] The patent of the present invention is applicable to the field of oxygen 18 isotope, and in particular relates to an industrial-grade method and device for producing 18O isotope by cryogenic distillation. Background technique [0002] Isotopes are rare and difficult to separate and extract, and are one of the top technologies in the field of cryogenic distillation; isotope cryogenic distillation separation technology has long been monopolized by Western developed countries, so the development of isotope cryogenic separation technology has strategic significance Great significance; high-abundance oxygen 18 isotope has important applications in medical, scientific research, agriculture and other civilian fields, while the domestic oxygen 18 isotope market supply is basically monopolized by developed countries and regions such as the United States, Japan and Europe; the existing domestic oxygen 18 isotope Separation technology lacks the characteristics of...

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Problems solved by technology

[0002] Isotopes are rare and difficult to separate and extract, and are one of the top technologies in the field of cryogenic distillation; isotope cryogenic distillation separation technology has long been monopolized by western developed countries, so the development of isotope cryogenic separation technology has strategic significance Great significance; high-abundance oxygen-18 isotope has important applications in medical, scientific research, agriculture and other civilian fields, while the domestic oxygen-18 isotope market supply is basically monopolized by developed countries and regions such as the United States, Japan and Europe; the existing domestic oxygen-18 isotope Separation technology lacks the characteristics of large amount of raw material processing and high output rate of target isotope, so it is difficult to apply to industrial-level isotope separation

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