Gas chromatography device for detecting sulfuryl fluoride in sulfur hexafluoride decomposition product

Abstract

The invention discloses a gas chromatography device for detecting sulfuryl fluoride in a sulfur hexafluoride decomposition product. The gas chromatography device comprises a sulfur hexafluoride separation device, a capillary column sampling device, a Gaspro chromatographic column, a micro-plate flow path control valve and a second sulfide detector, wherein the capillary column sampling device comprises a first inlet, a second inlet and a first outlet which are communicated with one another; the second inlet is communicated with the sulfur hexafluoride separation device; auxiliary gas is fed through the first inlet; the micro-plate flow path control valve comprises a third inlet, a second outlet and a third outlet; the Gaspro chromatographic column is respectively communicated with the first outlet and the third inlet; the second sulfide detector is communicated with the second outlet. The gas chromatography device for detecting the sulfuryl fluoride in the sulfur hexafluoride decomposition product, provided by the invention, can be used for accurately detecting the sulfuryl fluoride.

Description

technical field [0001] The invention relates to the technical field of detection of sulfur hexafluoride decomposition products, in particular to a gas chromatography device for detecting sulfuryl fluoride, a decomposition product of sulfur hexafluoride. Background technique [0002] SO 2 f 2 It is one of the decomposition products of sulfur hexafluoride gas, SO 2 f 2 The Chinese name is sulfuryl fluoride, which is one of the important parameters for fault judgment of sulfur hexafluoride electrical equipment. Accurate detection of decomposition products can improve the accuracy of equipment fault judgment and discover latent faults inside the equipment in advance. Inaccurate quantification and low detection sensitivity will lead to inaccurate characterization of equipment failure properties. [0003] At present, the general process of gas chromatography analysis of sulfur hexafluoride and its decomposition products is as follows: the sample gas enters the quantitative loo...

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Problems solved by technology

But due to the SF in the sample gas 6 as the background gas, SO 2 f 2 Concentration is very low, while Porapak QS column 6 , SO 2 f 2 The separation of the two components is not good, SF 6 The chromatographic peak is very high, SO 2 f 2 Chromatographic peaks generally appear in SF 6 The position of the shoulder peak of the chromatographic peak, so the analysis process flow is for SO 2 f 2 Inaccurate quantification and low sensitivity

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