Method for producing doubly labelled water by water distillation and distillation equipment for enrichment production of doubly labelled water

Abstract

The invention relates to a production method and a production device of chemical products, in particular to the production method of doubly labeled water consisting of deuterium and heavy oxygen O<18> enriched by a water reification method as well as a water rectification device thereof. The rectification device provided by the invention consists of a rectification tower in multilevel series or in multilevel and parallel series; each level of the rectification tower are connected in phase transition way; the connection way is to transport the steam in tower bottom to the top of the lower tower by using pressure difference and the steam is condensed to be liquid phase to enter lower level tower; ascending steam of the lower tower top is condensed to be liquid phase and then flows into higher level tower top automatically. In the invention, as a reboiler at the tower bottom adopts falling film evaporation, the tower bottom is dry all the time without the retention of liquid to greatly save the balancing time. On the other hand, as no rotating parts such as a pump, etc. is adopted, the possible troubles caused by leakage, power failure, mechanical fault, etc. can be avoided to ensure constant and reliable operation of the system, which is important for isotope separation.

Description

technical field [0001] The present invention relates to a kind of production method and production device of chemical product, specifically relate to a kind of water rectification method enrichment by deuterium D and heavy oxygen O 18 The production method of the constituted double-standard water and the water rectification device thereof. Background technique [0002] There are two stable isotopes of hydrogen in nature: H 1 (protium), H 2 (Deuterium); Oxygen has 3 stable isotopes: O 16 , O 17 , O 18 . Therefore, water composed of 2 hydrogen and 1 oxygen has 9 kinds of stable isotope molecules, and they all exist in natural water in different proportions. heavy isotope H 2 (ie D) The water formed is called heavy water. heavy isotope O 18 The formed water is called heavy oxygen water. Water composed of heavy hydrogen and heavy oxygen is called double water or double-labeled water. It is the heaviest molecule in the isotope of water. The US Chemical Abstracts CA regi...

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Problems solved by technology

[0010] 2. Rotating parts (pumps, blowers) will inevitably have mechanical failures, material leakage, etc.; accidental power outages, lightning, etc. will pose a serious threat to continuous and stable operation;

[0011] 3. The delivery volume of the pump is adjusted according to the liquid level of the tower kettle, which requires a relatively complicated control and adjustment system

[0012] 4. For the subsequent stage of the cascade, it is difficult to realize the applicable pump with high head and very small flow (100-500 g / h), and the performance is also unstable

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