In order to improve the dielectric strength, dielectric loss coefficient and other indicators of transformer insulating oil, the transformer oil must be purified before it is injected into the oil tank of transformer to remove moisture, gas and impurities. So we have to use Vacuum Transformer Oil Filtration Machine for targeted oil purification process of different types of transformer insulating oil

1. For transformer oil that is generally polluted by impurities such as water and dust, a plate press Transformer Oil Filter Machine can be used. After multiple cycles of filtration, it can usually meet the requirements. Its principle is to use filter paper to absorb moisture and filter impurities. Because of its simple structure and convenient handling, it has also been widely used. The disadvantage is that the filtration is not thorough, the removal of fine impurities is not good, and the cost is relatively high. When the moisture is large, the filter paper of plate press Transformer Oil Filter Machine needs to be replaced frequently.

2. Vacuum Transformer Oil Filtration Machine is commonly used now, which can not only completely remove moisture and gas in the oil, but also effectively remove tiny impurities. The process procedure: transformer oil to be processed → coarse filtration → fine filtration → vacuum dehydration and degassing of heating oil → clean oil. Pre-filtration uses a metal filter and a strong magnet, and fine filtration usually filters tiny impurities from 1 micrion.

At present, there are many types of micron filters, including metal powder sintered materials, metal microporous materials, ceramic filter materials, and filter paper filter cores with special structures.

Transformer Oil Filtration Machine Manufacturer adopts oil heating, vacuuming, dehydration and degassing, micron filtration, tec. The principle is to vacuum dehydration and degasification and spray the heated transformer oil to form oil mist, so that the gas and moisture in the oil can be evacuating. The temperature of the oil is generally around 60-80℃. This method has better dehydration and degassing effect, and it is the more commonly used method at present. However, if the oil is sprayed into a very fine mist, it is easy to be pumped away by the vacuum pump.

If the oil is sprayed into oil droplets with a certain diameter, the water and gas in the oil droplets cannot be fully utilized due to the high interfacial tension of the oil droplets. For this reason, the diameter of the spray hole should be selected appropriately, and it is generally necessary to set several baffles at the evacuation port of the tank to prevent the transformer oil from being pumped away by the vacuum pump.

At present, a relatively advanced thin film dehydration and degassing method is also used in foreign and domestic countries, which is to make the oil entering the tank form a very thin oil film after some degassing elements, and always complete the dehydration and degassing process in the oil film state. , Thus making the moisture and gas in the oil easy to remove