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Low temperature rectification cascade system for rectifying CO to produce stable isotope 13C

A stable isotope and low-temperature rectification technology, which is applied in the field of carbon stable isotope separation, can solve the problems of large pressure drop of cascade devices, difficult construction, and large energy consumption of conveying equipment, and achieve the effect of continuous operation.

Active Publication Date: 2014-06-18
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 between the isotope components 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 cascade system for rectifying CO to produce stable isotope 13C
  • Low temperature rectification cascade system for rectifying CO to produce stable isotope 13C
  • Low temperature rectification cascade system for rectifying CO to produce stable isotope 13C

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Embodiment 1

[0038] 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 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. Driven by the pressure, it is measured 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 tower It is filled with wire mesh corrugated packing to provide heat and mass transfer surfaces for the liquid condensed and refluxed in the ...

Embodiment 2

[0044] 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 tower is filled with corrugated wire mesh packing, which provides a surface for heat transfer and mass transfer for the liquid condensed and refluxed in the top condenser C2 and the evaporated vapor in the b...

Embodiment 3

[0050] A rectification of CO to produce stable isotopes 13 The low-temperature rectification cascade system of C is a cascade device composed of horizontally placed two-stage rectification towers with gradually tapered diameters. The rectification tower is composed of a top condenser, a bottom reboiler and a rectification column. The distillation towers are connected by pipelines. The first-stage rectification tower inputs raw materials from the middle, and the steam at the top of the rear-stage rectification tower is transported to the middle of the front-stage rectification tower by pressure through pipelines, and the liquid produced in the bottom of the front-stage rectification tower is vaporized in the pipeline. Under the action of pressure, it is transported to the middle of the rear stage rectification tower, and the steam at the top of the latter stage rectification tower can enter the front stage rectification tower at the feed point of the front stage rectification t...

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Abstract

The invention relates to a low temperature rectification cascade system for rectifying CO to produce stable isotope 13C. The low temperature rectification cascade system is a cascade unit comprising n stage rectifying towers that are arranged horizontally; the rectifying towers comprise overhead condensers, tower bottom reboilers and rectifying columns; and the rectifying towers are connected through pipelines. Compared with the prior art, extraction sections are arranged in the horizontally cascaded rectifying towers so as to reduce the material conveying flow rate between cascaded rectifying towers, the automatic material flow between the rectifying towers can be achieved at the same time by changing the pressure distribution of the horizontal cascade system, the material is conveyed among the intermediate rectifying towers without power conveying equipment, and the cascade unit can be ensured to operate stably and continuously for a long time.

Description

technical field [0001] The present invention relates to the stable isotope separation technology of carbon, in particular to a stable isotope produced by rectification CO 13 Cryogenic rectification cascade 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 low temperature d...

Claims

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Application Information

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