Stable isotopic tracer method-based research method for simulating SF6 overheating decomposition reaction
A technology of isotope tracing and decomposition reaction, applied in the field of simulating SF6 thermal decomposition reaction, can solve the problems of unclear decomposition reaction process, hinder the identification and diagnosis of decomposition products and internal faults of electrical equipment, etc., and achieve the effect of accurate detection
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Embodiment 1
[0029] The invention proposes an experimental research method based on an oxygen isotope tracer method for the effect of trace moisture on the superheated decomposition of SF6 and the mechanism of action. First, SF 6 The decomposition of cellulose is affected by many factors, such as temperature, air pressure, moisture content and so on. in SF 6 In gas-insulated equipment, internal materials release H during operation 2 O. Therefore, it is necessary to study the effect of different moisture content on SF 6 The impact of decomposition. Using the isotope tracer method, inject different contents of H 2 18 O, after fully reacting for a period of time in a superheated state, detect in the product by GC / MS means 18 The change law of the ratio of O, on the one hand, can strongly explain the H 2 Whether O participates in the formation process of the product and provides oxygen element for it; on the other hand, it can show the influence of the moisture content on the formation...
Embodiment 2
[0036] an isotope-based oxygen 18 o 2 , to the experimental research method of SF6 overheating decomposition product formation process, described method specifically comprises:
[0037] (1) Before each experiment, open the closed tank, and use absolute ethanol to completely wipe the inner wall of the tank, the inner wall of the lid and the surface of the local heat source, and wipe off the possible residual moisture and product residue after the previous experiment to avoid interference from impurities the next experiment;
[0038] (2) Install the local incandescent heat source inside the tank, cover and fix the lid of the tank, and then use a vacuum pump to evacuate the air chamber to a vacuum. In order to fully discharge the remaining impurities and a small amount of air inside, use SF with a purity of 99.999% 6 The gas is filled into the air chamber, and after reaching 0.1MPa, it is left to stand for 10 minutes, and then pumped to vacuum again, and the whole process is r...
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