Refilling type sulfur hexafluoride decomposition product chromatography online detector

Abstract

The embodiment of the invention discloses a refilling type sulfur hexafluoride decomposition product chromatography online detector. The refilling type chromatography detector is used for single-hole sulfur hexafluoride electrical equipment, achieves automatic online detection and analysis of insulating gas of the sulfur hexafluoride electrical equipment in the modes of vacuumizing, sample collection, sample analysis and sample refilling, has multiple detection components and high detection precision and can achieve automatic sampling, detection and refilling of sampling gas of the sulfur hexafluoride electrical equipment, so that harm caused by gas emission to personnel and environment is avoided, the insulativity of the electrical equipment cannot be affected by gas refilling, and the online detection frequency and timeliness of sulfur hexafluoride are greatly improved.

Description

technical field [0001] The invention relates to the field of electrical equipment detection, in particular to a refillable sulfur hexafluoride decomposition product chromatographic on-line detector. Background technique [0002] With the rapid development of the power industry, the number of sulfur hexafluoride electrical equipment continues to increase. Under electric arc, spark discharge, high temperature and other factors, sulfur hexafluoride gas is easy to ionize and decompose, and its decomposition products react with moisture and oxygen in electrical equipment to form SO 2 、H 2 S, HF and other acidic substances, and SF 4 、SOF 2 , SF 2 , SO 2 f 2 highly toxic and corrosive substances. Therefore, the detection of sulfur hexafluoride decomposition products, especially the detection of various decomposition products, is of great significance for judging the operating status, fault cause, discharge level and danger degree of electrical equipment. [0003] The curren...

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Problems solved by technology

[0004] However, because sulfur hexafluoride electrical equipment generally has only one air intake hole, there are problems such as poor circulation between the gas in the air intake hole and the gas in the sulfur hexafluoride gas chamber, and the dead volume at the air intake hole, which often occurs when sampling The problem of underrepresentation

In addition, the current detection of characteristic gases for sulfur hexafluoride gas includes SO 2 、H 2 S, CO, SO 2 f 2 , SO 2 F. CS 2 and other gas components, and the online detector based on the electrochemical sensor can only detect two kinds of components at most, resulting in low detection effectiveness and practicability of the instrument

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