Gas chromatography detection system and method for online analysis of trace He, H2 and impurity components in Ne

A detection system and gas chromatography technology, which can be used in analysis materials, measurement devices, material separation, etc., and can solve the problems of measurement influence, difficulty in accurate quantification, and small memory effect.

Active Publication Date: 2016-02-24
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Due to the strong adsorption effect and memory effect of the radioactive element tritium, traditional test methods such as ionization chambers, proportional counter tubes, etc., will have a great impact on the measurement of low-concentration tritium after testing high-concentration tritium, making it difficult to quantify accurately. Therefore, it is necessary to find a method that has a small tritium memory effect and can accurately measure tritium content online

Method used

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  • Gas chromatography detection system and method for online analysis of trace He, H2 and impurity components in Ne
  • Gas chromatography detection system and method for online analysis of trace He, H2 and impurity components in Ne
  • Gas chromatography detection system and method for online analysis of trace He, H2 and impurity components in Ne

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Example 1: O in Ne 2 , N 2 、CH 4 , CO, H 2 , Detection and analysis of He components

[0076] Detection of O in Ne 2 , N 2 、CH 4 , CO components (both 50ppm) and He, H 2 When the components (both are 100ppm), the entire gas path is purged first, the sample gas flow rate is 25mL / min, and the sampling pressure is 10psi. After the output is stable, the detection and analysis of each component can be started. It mainly includes the following three steps:

[0077] ① Analysis of O in Ne 2 , N 2 、CH 4 , CO component: the sample gas is quantified through the quantitative tube Ⅱ5-2, and the excess gas is emptied through the sample gas outlet, that is, the ninth port 19 of the ten-way valve Ⅰ1. The specific gas circuit sequence is as follows figure 1 Shown; Secondly, the sample gas in the He carrier gas carrying band quantitative tube II 5-2 of He carrier gas second introduction branch 102 imports enters the second separation chromatographic column 7-2 (molecular sieve...

Embodiment 2

[0081] Example 2: H in He 2 , O 2 , N 2 、CH 4 , Detection and analysis of CO components

[0082] Detection of H in He 2 (50ppm), O 2 , N 2 、CH 4 , CO (both 5ppm) components, the entire gas path is purged first, the sample gas flow rate is 25mL / min, and the sampling pressure is 10psi. After the output is stable, the detection can be started. The detection process is the same as in Example 1. Middle Ne Middle O 2 , N 2 、CH 4 The detection process of , CO components is the same, and finally tested by PED8.

[0083] Figure 9 H in He 2 (50ppm) and O 2 , N 2 、CH 4 , CO (both 5ppm) and the chromatograms of the impurity components, it can be seen that the separation of each component is very obvious, and the separation can be completed within 300s. 2 The detection limit of the components is less than 26ppb, and the detection limits of other components are all less than 3ppb.

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Abstract

The invention relates to a gas chromatography detection system and method for online analysis of trace He, H2 and impurity components in Ne. The system comprises a ten-way valve I (1), a quantification tube I (5-1), a quantification tube II (5-2), a first predissociation chromatographic column (6-1), a six-way valve I (2), a first dissociation chromatographic column (7-1), a six-way valve II (3), a second dissociation chromatographic column (7-2) and a plasma emission detector (8); a second valve way comprises a ten-way valve II (4), a quantification tube III (5-3), a second predissociation chromatographic column (6-2), a third dissociation chromatographic column (7-3), a heat conduction detector (9) and matched pipelines. With the adoption of the system and the method, content of the trace He and H2 components and O2, N2, CH4 and CO impurity components in Ne as well as content of H2, O2, N2, CH4 and CO impurity components in He can be accurately analyzed online, the gas analysis process is simplified, and gas analysis errors are reduced.

Description

technical field [0001] The invention belongs to the technical field of gas chromatography analysis, in particular to a method for online analysis of trace He, H in Ne 2 A gas chromatography detection system and method for impurity components. Background technique [0002] Fusion energy is a long-term solution for future energy. One of the key technologies for commercialization is the research of helium-cooled solid-state tritium-producing blanket (TBM) in fusion reactors. Its main functions are to realize energy conversion, tritium multiplication and contain plasma Wait. The amount of tritium existing in nature is negligible, and the preparation of tritium is basically obtained by artificial means, so through Li 4 SiO 4 , Li 2 TiO 3 Tritium multiplication ceramic pellets can realize energy conversion while realizing tritium multiplication. The rate of tritium production is obtained by irradiating the solid breeder in the reactor, and it is necessary to verify the neutr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/20G01N30/60
CPCG01N30/20G01N30/6039
Inventor 杨洪广杨丽玲占勤刘振兴黎文宇刘振启张晓红
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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