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　　1、 The formation of sludge and water in transformer oil:

　　The formation of a large number of oil sludge inside the transformer is mainly composed of four grades of dust and carbon deposition, and the first grade oil has various excellent indexes; however, conventional transformer oil insulating oil vacuum purifier can also be used for daily purification of water and impurities.

　　The second and third grades of oil are within the scope of "preventive maintenance" and belong to better grades. Although all functions of the oil can still be maintained, when the interface tension drops to 27.0mn/m, it indicates that the dissolved oil sludge has begun to form. It is suggested that the transformer should be overhauled at this time; In addition, the transformer oil shall be completely cleaned and discharged, and the transformer oil filtering device (Zui is a multifunctional oil filter with degassing and acid reducing value to improve the withstand voltage strength and reduce the dielectric loss value) shall be used to regenerate and purify the transformer insulating oil, so as to reduce the wear of the oil on the equipment.

　　The last 3 oil is the oil in the "fault maintenance" stage, which requires immediate maintenance and treatment; almost all the internal parts of the "bad oil" transformer have sludge deposits. When the oil level reaches the "fault" level, the remaining life of the transformer should be considered instead of just

　　It's the oil quality. This kind of oil, generally through the oil quality test, according to the performance parameters, consider whether it has recycling use. For better quality brown or dark brown transformer insulating oil, BZ insulating oil regeneration device can be used to improve the acid quality, dielectric loss and withstand voltage value of the oil, which can be used as insulating oil for other insulation purposes.

　　2、 Treatment of contaminated transformer oil:

　　Treatment method of contaminated transformer oil: the contaminated transformer oil (commonly known as dirty oil) refers to the transformer oil polluted by colloid formed by the combination of extremely small impurities and oil molecules, as well as the transformer oil used for many years, which is generally the oil discharged from the repair product (the pH value of the oil is very low). In order to improve the oil index, adsorption must be used. Generally, activated alumina (A12O3) is used as adsorbent. In the waste oil treatment system, in order to ensure the full contact between the active alumina and the transformer oil, and to facilitate the replacement of the active alumina, a number of partitions are set in the active alumina tank, and the active alumina is put into a small cloth bag for rotation, and it is not allowed to be bulk. After heating, the transformer oil is sent to the silica gel tank for a certain period of time, so that it can give full play to the adsorption effect, and then it is injected into the clean oil tank through the oil filter. In the process of treatment, it should be monitored regularly to determine the adsorption effect. When the adsorption effect is not obvious, it should be considered to replace the active alumina. Generally, the amount of active alumina accounts for 3% - 5% of the oil by weight. The waste oil treatment system shall be separated from the new oil treatment system to avoid cross contamination. Tanks, containers, etc. with used dirty oil must be thoroughly cleaned before being used in the normal production oil system.

　　Use of activated alumina:

　　Active alumina desiccant is non-toxic, odorless, non powdered and insoluble in water. Under certain operating conditions and regeneration conditions, its drying depth is as high as dew point temperature - 70 ℃, which is an efficient desiccant for deep drying of trace water. It is widely used in gas and liquid phase drying of petrochemical industry, air intake equipment such as air filter and air compressor, and air drying of automatic instrument. High performance activated alumina can bring the following benefits in the batching of amorphous refractories: improving the density, fluidity and strength of the green body, increasing the amount of secondary mullite formation, reducing the amount of water and porosity. Active alumina belongs to the category of chemical alumina, which is mainly used as adsorbent, water purification agent, catalyst and catalyst carrier. According to different uses, its raw materials and preparation methods are different.

　　Transformer oil vacuum oil filter:

　　It is mainly used for the purification of insulating oil and the removal of water, gas and mechanical impurities, so as to improve the withstand voltage strength and oil quality of insulating oil and ensure the safe operation of high-voltage electrical equipment. The treated oil meets the national standard and is a common oil filtration equipment in the power industry.

　　3、 Effect of transformer oil on Transformer:

　　Transformer oil insulation oil mainly plays the role of insulation, heat dissipation and arc suppression. However, the color of transformer oil insulation oil is usually an intuitive manifestation of Zui that reflects the quality and performance of oil products. Many technicians will first judge the pollution degree of oil by its color, viscosity and smell. Good transformer oil shall be clean and transparent liquid, free of sediment, mechanical impurity suspension and cotton like substance. If it is polluted and oxidized, and produces resin and sediment, the quality of transformer oil will deteriorate, and the color will gradually become light red until it becomes dark brown liquid. When there is a fault in the transformer, the color of the oil will change. In general, when the transformer oil is light brown, it should not be used again. In addition, the transformer oil can be turbid, milky, black and dark. The turbid emulsion of transformer oil indicates that there is moisture in the oil. The darkening of oil color indicates the aging of transformer oil insulation. The oil is black and even has a burnt smell, indicating that there is a fault inside the transformer.

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