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Helium ionization gas chromatography system for analyzing decomposition products of SF6

A technology of gas chromatography system and decomposition products, which is applied in the direction of material separation, analysis materials, measuring devices, etc., can solve the problems that affect the qualitative and quantitative analysis of decomposition products, cannot achieve effective detection, and low sensitivity, so as to achieve the guarantee of technological innovation and continuous operation Reliable, product quality guaranteed effect

Active Publication Date: 2014-11-19
SHANGHAI HUAAI CHROMATOGRAPHIC ANALYSIS
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

The sensitivity of TCD detection is low, and the purpose of effective detection cannot be achieved. 6 The response is very large, which affects the qualitative and quantitative analysis of decomposition products
Due to the lack of relevant detection methods, domestic users are not interested in SF 6 There are blind spots in the chromatographic analysis of decomposition products

Method used

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  • Helium ionization gas chromatography system for analyzing decomposition products of SF6
  • Helium ionization gas chromatography system for analyzing decomposition products of SF6
  • Helium ionization gas chromatography system for analyzing decomposition products of SF6

Examples

Experimental program
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Effect test

Embodiment

[0019] According to attached figure 1 , the sample fills the first quantitative tube 5, the second quantitative tube 6 and the third quantitative tube 7 respectively through the tenth port valve 1, and the sampling process of the sample is completed.

[0020] According to attached figure 2 , after the sample is sampled, turn the tenth-way valve 1 and the twentieth-way valve 4 to complete the sample injection process.

[0021] According to attached figure 2 And attached image 3 After the sample injection is completed, the sample enters the first chromatographic column 8, and after the pre-separation by the first chromatographic column 8, the active ingredient enters the second chromatographic column 12 through the first six-way valve 2, and is completely separated again; After the components are pre-separated by the first chromatographic column 8, the first six-way valve 2 is switched to effectively vent. As required, the above actions can be repeated several times to co...

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Abstract

The invention provides a helium ionization gas chromatography system for analyzing decomposition products of SF6. The system in characterized by includes a central cutting device and a double helium ionization detector. The central cutting device includes four switching valves, six chromatography columns and seven carrier gas paths. The double helium ionization detector includes two sets of helium ionization detector devices. The helium ionization gas chromatography system for analyzing decomposition products of SF6 also includes a chromatography column box temperature controlling device and a carrier gas cutting and air-insulation device, wherein the chromatography column box temperature controlling device includes a set of programme temperature increasing column box and three sets of individual column sub temperature-controlling column boxes, and the carrier gas cutting and air-insulation device includes a set of four-way valve system and a set of carrier gas path. By means of the system, total analysis of the decomposition products of SF6 can be completed just by one sample-feeding operation.

Description

technical field [0001] The invention relates to a gas chromatographic system, in particular to a helium ionization gas chromatographic system for trace impurity analysis, which utilizes the high sensitivity of a helium ion detector to detect ppb-level impurities in germane, and is a method for SF 6 Detection equipment for decomposition product analysis. Background technique [0002] SF 6 The decomposition product is the protective gas SF in the running power equipment 6 During or after operation, the equipment produces products generated by discharge or overheating, and the decomposition products are: H 2 , O 2 , N 2 、CH 4 、CF 4 , CO, CO 2 、C 2 f 6 、C 3 f 8 、H 2 S, COS, F 2 SO 2 、FSO 2 , SO 2 etc., by detecting SF 6 The decomposition products can detect the failure of electrical equipment and prevent the occurrence of failure, so as to ensure the supply of industrial and civil electricity. [0003] At present, traditional TCD or FID detectors are generally ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/88
Inventor 庄鸿涛杨康方华
Owner SHANGHAI HUAAI CHROMATOGRAPHIC ANALYSIS
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