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Low-temperature rectification system for producing stable isotope carbon-13 by using CO

A technology of stable isotope and low-temperature rectification, which is applied in the field of stable isotope separation of carbon, can solve the problems of large pressure drop, unfavorable separation, and poor connection of cascade devices, etc., and achieve the effect of continuous operation

Active Publication Date: 2012-05-02
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large number of theoretical plates required in the isotope separation process, the tower equipment is very high, so the construction is relatively difficult; in addition, due to the relatively large pressure drop of the cascade device, the separation coefficient of the system is reduced, which is not good for separation
In comparison, the construction difficulty of the horizontal cascade is much less, but, in the n-level horizontal cascade device of the prior art, the top feed and output of the 2nd to n-stage rectification towers maintain the liquid phase and the gas phase Therefore, the material flow rate between the cascaded towers is very large. On the one hand, the energy consumption of the conveying equipment is relatively large. On the other hand, this cascade device has relatively high requirements for automatic control and instrumentation. High, and requires that each stage must operate continuously and stably. An accident in any stage of the tower will cause poor connection of the cascade device

Method used

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  • Low-temperature rectification system for producing stable isotope carbon-13 by using CO
  • Low-temperature rectification system for producing stable isotope carbon-13 by using CO
  • Low-temperature rectification system for producing stable isotope carbon-13 by using CO

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Effect test

Embodiment 1

[0040] The cascade device in embodiment 1 is made up of 4 grades of rectifying towers, and the technological flow diagram of cascade device is as follows figure 2 shown. The CO raw material is measured by the flow meter F1 and transported to the middle of the first stage tower T1 by the pipeline L3. The T1 tower is filled with metal mesh corrugated packing, which is the liquid condensed and refluxed in the top condenser C1 and the bottom reboiler B1. The vaporized vapor provides a surface for heat and mass transfer. The high-abundance carbon-12 is taken out from the top of the T1 tower through the pipeline L2, and a part of the steam is taken out from the bottom of the T1 tower. Driven by the pressure, it is metered through the valve V1 and the flow meter F2 and then sent to the middle of the tower T2 along the pipeline L4. The T2 column is filled with wire mesh corrugated packing to provide heat and mass transfer surfaces for the liquid condensed and refluxed in the top con...

Embodiment 2

[0046] The cascade device in embodiment 2 is made up of 4 grades of rectifying towers, and the technological flow diagram of cascade device is as follows Figure 4 shown. The CO raw material is measured by the flow meter F1 and then transported to the middle of the first stage tower T1 by the pipeline L3. The T1 tower is filled with corrugated wire mesh packing, which is the liquid condensed and refluxed in the top condenser C1 and the bottom reboiler B1. The vaporized vapor provides a surface for heat and mass transfer. The high-abundance carbon-12 is taken out from the top of the T1 tower through the pipeline L2, and a part of the steam is taken out from the bottom of the T1 tower, and is transported to the middle of the tower T2 ( Figure 4 Midpoint d position). The T2 column is filled with wire mesh corrugated packing to provide heat and mass transfer surfaces for the liquid condensed and refluxed in the top condenser C2 and the vaporized vapor in the bottom reboiler B2....

Embodiment 3

[0052] A stable isotope produced from CO 13 The low-temperature rectification system of C is a cascade device composed of two stages of rectification towers with gradually tapering diameters placed horizontally, wherein the rectification tower is composed of a top condenser, a bottom reboiler and a rectification column, and each stage The distillation towers are connected by pipelines. The first-stage rectifying column can input raw materials from the middle. The steam at the top of the rectifying tower in the cascade device is transported by the gas delivery pump to the middle of the rectifying tower in the previous stage through the pipeline, and the liquid produced in the bottom of the rectifying tower in the preceding stage is vaporized in the pipeline and then under pressure It is sent to the middle part of the rear stage rectification tower. The vapor at the top of the rear stage rectification tower can be returned to the feeding point of the front stage rectification ...

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Abstract

The invention relates to a low-temperature rectification system for producing stable isotope carbon-13 by using CO; and the low-temperature rectification system is a cascade unit which comprises horizontally arranged n stages of rectifying towers, wherein each rectifying tower comprises an overhead condenser, a tower bottom reboiler and a rectifying column, and the rectifying towers at different stages are connected through the pipeline. Compared with the prior art, the low-temperature rectification system has the advantages that material conveying flow among the cascaded towers is reduced by arranging extracting sections in the horizontal cascaded towers and the cascade unit can be ensured to stably and continuously operate for long term.

Description

technical field [0001] The present invention relates to the stable isotope separation technology of carbon, especially relates to a kind of adopting low-temperature rectification CO to produce 13 C cryogenic distillation system. Background technique [0002] In carbon-containing compounds, carbon is a stable isotope 12 C. 13 C and radioactivity 14 C exists in nature, where 12 C with 13 The natural abundance ratio of C is about 98.9:1.1. With the development of technology, 13 C as a tracer atom has been widely used in the fields of medicine, pharmacology, biochemistry and life sciences. In addition, high-abundance 12 The better physical properties of synthetic diamonds than natural products have also received attention. [0003] In the prior art, there are many kinds of stable isotopes 13 The production method of C, such as thermal diffusion method, gas diffusion method, chemical exchange method, cryogenic rectification method, laser method, etc. Among them, the lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D59/04
Inventor 许保云李虎林陈大昌周建跃李良君杜晓宁蔡扬龙磊吉永喆
Owner SHANGHAI RES INST OF CHEM IND
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