SF6 gas decomposition product analysis device based on Fourier transform

Abstract

The invention discloses an SF6 gas decomposition product analysis device based on Fourier transform. The SF6 gas decomposition product analysis device comprises a primary filter, a sampling pipe, a flow regulating mechanism, an FTIR analysis meter and a waste gas collecting mechanism which are communicated in sequence, wherein the flow regulating mechanism comprises a flow regulating valve, a flow meter and a pressure gage which are connected in sequence, and the inlet of the flow regulating valve is communicated with the outlet of the sampling pipe, while the pressure gage is connected with the FTIR analysis meter; the sampling pipe comprises a sampling pipe body, and a first self-sealing joint and a second self-sealing joint are arranged at the inlet and the outlet of the sampling pipe body respectively, while the first self-sealing joint and the second self-sealing joint are communicated with the primary filter and the flow regulating valve respectively. The SF6 gas decomposition product analysis device provided by the invention can combine gas sampling and gas detection into one body, secondary pollution can be avoided, and the device also has the advantages of being high in detection precision and small in required gas amount and being capable of accurately controlling gas amount.

Description

technical field [0001] The invention relates to gas sampling and detection equipment in the power industry, in particular to a Fourier transform-based SF 6 Gas decomposition product analysis device. Background technique [0002] The present research results have shown that when SF 6 When an insulation fault occurs in the equipment, the high temperature arc generated by the discharge makes the SF 6 Gas decomposition reaction, SF 6 The decomposition products of internal faults in electrical equipment are mainly sulfides and fluorides, and the sulfides are mainly SO 2 、H 2 S, SF 4 , SO 2 f 2 、SOF 2 etc. Fluoride mainly includes HF, CF 4 and metal fluorides. [0003] In addition to SO in the above decomposition products 2 、H 2 S and CF 4 Except for low toxicity, the others are highly toxic, and the content in the equipment is very small and unstable; among them, SF 4 、SOF 2 It will be hydrolyzed to produce stable SO 2 and HF, therefore, the detected SO 2 Conc...

AI Technical Summary

Problems solved by technology

But the existing Fourier transform-based SF 6 Gas decomposition product analysis device for SF 6 Sampling and detection of gas decomposition products are carried out separately, usually in the gas environment first, and then the SF obtained by sampling 6 The gas and its decomposition products are taken out from the sampling equipment and stored in another storage tank. When the gas sample needs to be tested, the SF in the storage tank 6 The gas and its decomposition product samples are extracted and input into the FTIR analyzer, not only the process is complicated, but also the SF 6 From sampling to analysis, the gas and its decomposition products need to be extracted and stored many times in the middle, so it is very easy to bring other gases and moisture in the external environment into the sampled gas, causing secondary pollution and seriously affecting SF. 6 Detection accuracy of gas and its decomposition products

In addition, the existing Fourier transform-based SF 6 The gas decomposition product analysis device requires a large amount of gas, and the gas amount cannot be accurately controlled during the detection process

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