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Method for quantifying mineral oil content in sulfur hexafluoride gas

A technology of sulfur hexafluoride gas and mineral oil, which is applied in the field of electrochemistry, can solve the problems of low accuracy and large errors, and achieve the effect of fast and accurate quantitative analysis and simplified drawing steps

Active Publication Date: 2015-07-29
STATE GRID CORP OF CHINA +3
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Problems solved by technology

At present, the quantification of mineral oil content in sulfur hexafluoride gas needs to be measured with the help of carbon tetrachloride standard solution prepared from mineral oil. Due to the strong volatility of carbon tetrachloride and the large number of prepared solutions, the parallel test error is relatively large. large, less accurate

Method used

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Embodiment Construction

[0013] The present invention will be specifically introduced below in conjunction with specific embodiments.

[0014] The mineral oil content quantitative method in the sulfur hexafluoride gas of the present embodiment may further comprise the steps:

[0015] S1, draw the working curve: select 8 pieces of PTFE filter membranes with a diameter of 100 mm, number them according to 1-8, and weigh the quality of the filter membranes successively; Spray the solution 0, 1, 2, 3, 4, 5, 6, 7 times respectively, after the solvent is completely volatilized, weigh the mass of No. 1-8 filter membrane respectively, and obtain the mass m1, m2, m3, m4 of the weight gain before and after , m5, m6, m7, m8, the filter membrane was measured on an infrared spectrophotometer in turn, and the measured 2930cm -1 The absorbance of the wave number, and then plot the absorbance with the weight gain of the filter membrane to obtain the working curve;

[0016] 2) Mineral oil absorption: the sulfur hexaf...

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Abstract

The invention discloses a method for quantifying the mineral oil content in sulfur hexafluoride gas. The method defines the mineral oil content in sulfur hexafluoride as the mineral oil quantity in sulfur hexafluoride gas, namely, the method is used for measuring and detecting the quantity increase of a filter membrane after the filter membrane filters sulfur hexafluoride gas with a certain volume. The quantitative method comprises the following steps: a mineral oil carbon tetrachloride solution with certain concentration is sprayed on the surfaces of a plurality of filter membranes; the filter membranes are constant in weight after the solution fully volatilizes; the absorbancy of the filter membranes is measured on an infrared spectrophotometer; a relationship and quantification curve of the absorbancy and the quantity increase is drawn to achieve quantification analysis. The method for quantifying the mineral oil content in sulfur hexafluoride gas provided by the invention solves the difficulty that a parallel text has big errors because a mineral oil standard solution prepared in the conventional mineral oil content detecting process is easy to volatilize, and has the characteristic that the method is accurate in quantification, easy and convenient to operate, high in stability, and the like.

Description

technical field [0001] The invention relates to a quantitative method for mineral oil content in sulfur hexafluoride gas, belonging to the technical field of electrochemistry. Background technique [0002] Whether it is industrial sulfur hexafluoride gas or sulfur hexafluoride gas in operation, the mineral oil content is a key indicator of its quality control, which is crucial to improving the safety and service life of electrical equipment. At present, the quantification of mineral oil content in sulfur hexafluoride gas needs to be measured with the help of carbon tetrachloride standard solution prepared from mineral oil. Due to the strong volatility of carbon tetrachloride and the large number of prepared solutions, the parallel test error is relatively large. Large and not very accurate. With the widespread application of sulfur hexafluoride gas in power equipment, it is very important to develop a new quantitative method for mineral oil and improve the accuracy of miner...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/02
Inventor 朱洪斌张晓琴王晨余翔孙刚张建国陈大兵刘建军
Owner STATE GRID CORP OF CHINA
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