Fourier infrared spectrum analysis method for SF6 (sulfur hexafluoride) decomposition product

Abstract

The invention discloses a Fourier infrared spectrum analysis method for a SF6 (sulfur hexafluoride) decomposition product. The method is characterized by comprising the following steps: introducing sample gas into an absorption cavity of a Fourier infrared spectrum spectrophotometer for performing Fourier infrared spectrum analysis, wherein the analysis parameters are that a detector is a photoconductive detector, the pressure balance is 0.1+ / -0.01mbar, a refrigerant is 400+ / -1mL and the temperature is 196 DEG C below zero+ / -1 DEG C. According to the method, the problems that HF, SF4, S2F10 and SiF4 in the SF6 decomposition product cannot be accurately analyzed in the conventional technical means can be effectively solved, the decomposition products such as SO2, HF, SF4, SOF2, SOF4, SO2F2, S2F10, SiF4, CF4, CO and COS in the SF6 are accurately analyzed, the internal operating conditions of SF6 gas insulated equipment are effectively judged, the failure of electrical equipment is successfully judged, and the safety operation of the electrical equipment is guaranteed.

Description

technical field [0001] The invention relates to the field of analysis and detection, in particular to a SF 6 Fourier transform infrared spectroscopic analysis method of decomposition products. Background technique [0002] Sulfur hexafluoride (SF 6 ) is a colorless, odorless, non-toxic, non-flammable and chemically stable synthetic gas at normal temperature and pressure. SF 6 The molecular structure of monosulfide and polyfluorine is extremely strong electronegativity, endowing it with excellent electrical insulation and arc extinguishing properties. Currently, SF 6 As a new generation of insulating medium, it is widely used in high-voltage and ultra-high-voltage electrical equipment. Refill SF 6 The electrical equipment occupies a small area, the operating noise is small, and there is no risk of fire, which greatly improves the safety and reliability of electrical equipment operation. [0003] SF 6 Under the action of overheating, electric arc, electric spark and co...

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Problems solved by technology

[0006] The traditional chromatographic analysis method uses Gaspro capillary column single column to analyze SF 6 The decomposition products were separated and tested, using TCD and FDP serial detectors for SF 6 The decomposition products are analyzed. The principle of the traditional chromatographic analysis method is to separate the components to be measured through the chromatographic analysis column, and then measure the separated components through the detector. Due to the strong corrosiveness of HF, the chromatographic method In the process of separation, HF is absorbed by the column and cannot be detected

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