Gas chromatography for measuring gas content and characteristic gas in insulating oil completed at one time of sample injection

A gas chromatography and characteristic gas technology, which is applied in measuring devices, instruments, scientific instruments, etc., can solve the problems of increased workload, minimum detection concentration of temperature rise, high requirements for vacuum instruments and difficult to popularize, etc., and achieves small workload and simple operation. , the effect of reducing the analysis error

CN1687769AActive Publication Date: 2005-10-26STATE GRID HUBEI ELECTRIC POWER RES INST +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2005-10-26

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Abstract

This invention publishes a kind of gas phase chromatography method which can measure the air content and the specific gas in the insulating oil with just once sampling. This invention uses Ar as carrier gas. It also uses the packed column sample entrance. What is more, it has six-way value color-spectrum-switching column, heat transmission detector and the H-fire ionization detector. During the process, Ar is divided into 2 parts. One part will directly go out after it goes through the heat transmission detector's reference arm 6, while the other part will go by steps through the sample entrance 1, the first color spectrum column 2, the six-way value 4, the second color spectrum column or gas lock 3, the heat transmission detector 7, the Ni catalysis CH4 converter 8 with H2, and at last the H fire ionization detector 9 with the air. Then it will go out. During the only one sampling, the invention can meanwhile measure the air content and analyze the accident specific gas in the simple oil. To sum up, it operates easily, needs little work and can decrease the analysis error relatively. So it can do the work of analyzing the sample oil which has low degassing ratio well, as it can satisfactorily separate all the groups.
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Description

technical field

[0001] The invention relates to a gas chromatographic method for measuring the gas content and characteristic gas in insulating oil, in particular to a gas chromatographic method for measuring the gas content and characteristic gas in insulating oil in one injection. Background technique

[0002] The gas content in the insulating oil is an important acceptance index before the 500kV oil-filled equipment is put into operation, and it is also an important basis for measuring the operation status of the oil-filled equipment. The size of the air content not only affects the operation safety of the equipment, but more importantly, it directly affects the aging speed of insulating oil and paper, that is, the operating life of the equipment; therefore, it is more and more valued by power production units such as power plants and power supply bureaus. .

[0003] At present, the methods for measuring the gas content of insulating oil include vacuum differential press...

Examples

Embodiment Construction

[0055] The first chromatographic column 2 is a stainless steel packed column, the column length is 365.76cm, the column inner diameter is 2.1mm, and the filler is 80-100 mesh polymer Porapak N; the second chromatographic column 5 is a stainless steel packed column, and the column length is 182.88cm , the inner diameter of the column is 2.1mm, and the filler is 60-80 mesh molecular sieve 5A;

[0056] Adjust the flow rate of argon (carrier gas) to 20ml / m, the flow rate of hydrogen to 45ml / m, and the flow rate of air to 450ml / m;

[0057] Thermal conductivity detector 7: bridge current 80mA, 100°C;

[0058] Hydrogen flame ionization detector 9: 380°C;

[0059] Oven temperature: 70°C.