Transformer oil chromatographic analyzer insulation oil is essential insulation material in transformer, but also is the cooling oil of transformer winding and iron core. Transformer oil contains carbon monoxide, carbon dioxide, methane, ethane, acetylene, ethylene, hydrogen and other gases. When the total gas content in the insulation oil is less than 3% (V/V), the insulation oil has the best quality and can play a good insulation effect. Through the oil chromatographic analysis of oil-filled electrical equipment, it can predict the latent fault inside the equipment, effectively prevent the expansion of the accident, or as a basis for judging the fault location after the accident.
Chromatography is a separation technology, its separation principle is to make the components in the mixture in two phases of distribution, one phase is stationary, called stationary phase; The other phase is the fluid that pushes the mixture through the stationary phase, called the mobile phase. When the mixture contained in the mobile phase passes through the stationary phase, it interacts with the stationary phase. Due to the different properties and structures of each component, the size and strength of the interaction are also different. Therefore, under the same driving force, different components stay in the fixed phase for a long time or a short time, and then flow out from the fixed phase in different order.
Gas chromatography is a gas as mobile phase chromatography, its general flow mainly includes three parts: carrier gas system, column and detector.
Gas chromatography was developed in the 1940s, mainly composed of gas circuit system, sample injection system, separation system (chromatographic column), detection system, temperature control system, data processing, recording system and power supply, electronic circuit and other parts. It is suitable for volatile natural complex samples and samples requiring detection sensitivity. It has the advantages of low price, low maintenance and use cost, easy automation and rapid and accurate detection and analysis. It plays an important role in many fields such as petroleum, chemical industry and environment. According to its principle, it can be divided into gas-liquid chromatography and gas-solid chromatography. Among them, gas-liquid chromatography is the main force of gas chromatography analysis, which can be applied to all types of samples. As long as the boiling point of the separated components is not higher than 400°C, good separation and detection can be achieved. The characteristics of gas-solid chromatography are also very obvious, because there is basically no fixed phase loss problem, the temperature range is very wide, the column life is very long; A variety of adsorbents are available for selection or modified use, separation selectivity is good, even can separate cis, anti - stereoisomer. However, it should be noted that some adsorbents have catalytic activity at high temperature and it is not suitable to separate thermally unstable compounds.
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