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Hypothermia distillation device and method for separating stable isotopes

A low-temperature rectification and separation method technology, applied in the field of low-temperature rectification and separation equipment, can solve the problems such as the lack of application of low-temperature rectification tower adiabatic, and achieve the effects of increasing investment and technical difficulty, convenient operation and high separation efficiency

Inactive Publication Date: 2007-05-16
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] There have been applications of multi-layer thermal insulation liquid pipelines in China (Sichuan Air Separation Group, Chengdu Vigorous Vacuum Equipment Co., Ltd.), but there is no thermal insulation applied to cryogenic rectification towers, especially for isotope cryogenic rectification

Method used

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  • Hypothermia distillation device and method for separating stable isotopes
  • Hypothermia distillation device and method for separating stable isotopes
  • Hypothermia distillation device and method for separating stable isotopes

Examples

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Embodiment 1

[0041] Example 1: CO cryogenic rectification separation of stable isotopes 13 C

[0042] As shown in Figure 1, the device is a low-temperature rectification device for separating stable isotopes with only one low-temperature rectification tower. The low-temperature rectification tower uses stainless steel wire mesh corrugated packing as structured packing, and the tower body is insulated with high-vacuum multi-layer insulation materials. The specific surface areas of the wire mesh corrugated packing are 500, 1000, and 1700m respectively. 2 / m 3 . The performance parameters are shown in Table 1. X shown in the table F is the heavy isotope abundance of raw gas, X L is the heavy isotope abundance of the light isotope product, X H is the heavy isotope abundance of the heavy isotope product.

[0043] Table 1.

Embodiment 2

[0044] Example 2: Separation of Stable Isotopes by Two-column CO Low Temperature Rectification 13 C

[0045] As shown in Figure 2, the device is a low-temperature rectification device for separating stable isotopes comprising two low-temperature rectification towers (two-column cascade). The low-temperature rectification tower uses stainless steel wire mesh corrugated packing as the structured packing, and the tower body is insulated with high-vacuum multi-layer insulation materials. The diameters of the cascaded towers are 1m and 0.5mm respectively. The performance parameters are shown in Table 2. X shown in the table F is the heavy isotope abundance of raw gas, X L is the heavy isotope abundance of the light isotope product, X H is the heavy isotope abundance of the heavy isotope product, X B is the heavy isotope abundance at the bottom of the column in section B.

[0046] Table 2.

[0047] project

[0048] X F ，％

Embodiment 3

[0049] Example 3: NO cryogenic distillation and separation of stable isotopes 18 o

[0050] As shown in Figure 1, the device is a low-temperature rectification device for separating stable isotopes with only one low-temperature rectification tower. The low-temperature rectification tower adopts phosphor green steel wire mesh corrugated packing as structured packing, and the tower body is insulated with high-vacuum multi-layer insulation materials. The specific surface areas of the wire mesh corrugated packing are 500, 1000, and 1700m respectively 2 / m 3 . The performance parameters are shown in Table 3. X shown in the table F is the heavy isotope abundance of raw gas, X L is the heavy isotope abundance of the light isotope product, X H is the heavy isotope abundance of the heavy isotope product.

[0051] table 3.

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Abstract

The invention relates to a low-temperature finestiller for separating stable isotope elements, wherein it comprises at least one low-temperature finestill tower, which is packed with multilayer thermal-insulated layer at high vacuum; the tower is filled with multilayer stuff; the density of multilayer thermal-insulated material is 10-150layer / cm; the vacuum of thermal-insulated layer is lower than 10-1Pa; the stuff is wave stuff as plate wave stuff and mesh wave stuff as best. The inventive separating method comprises processing low-temperature gas-liquid conversation in the low-temperature finestill tower, to separate the isotope elements. The invention can be used in CO, CH4, NO, BF3, O2, H2, He, or Ne to separate 3CO, 3CH4, C18O, 18OO, 15NO, N18O, 10BF3, 2H, 3H, 3He, 22Ne, 12CO, 12CH4, N16O, 14NO, 11BF3, and 20Ne.

Description

technical field [0001] The invention relates to a low-temperature rectification separation device and method, in particular to a low-temperature rectification device and separation method for separating stable isotopes. Background technique [0002] The application of stable isotope is more and more extensive, and its separation methods include thermal diffusion method, gas diffusion method, centrifugal separation method, laser method, chemical exchange method, ion exchange method and rectification method. However, only low-temperature distillation is currently suitable for industrial applications. stable isotope 13 C. 18 O. 15 N. 10 B is mostly CO, NO, BF 3 It is obtained by low-temperature distillation of raw materials. [0003] CO cryogenic distillation 12 CO / 13 The ideal separation coefficient of CO is 1.01, but most of them are actually less than 1.008, so it is necessary to obtain a natural abundance of 1.11%. 13 CO enrichment to 99% 13 CO, typically require...

Claims

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Application Information

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IPC IPC(8): B01D59/04
Inventor 李虎林李良君杜晓宁陈仙送袁维新于国庆刘建亮杨继群
Owner SHANGHAI RES INST OF CHEM IND
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