Fully-enclosed transformer insulating oil treatment system

Abstract

A fully-enclosed transformer insulating oil treatment system comprises an oil inlet pump, a primary filter, an electric heater, vacuum de-gassing tanks, an oil outlet pump, a precision filter and a check valve which are sequentially connected between an oil inlet and an oil outlet of a transformer oil tank through a pipeline; and a first ball valve is arranged on the pipeline between the electricheater and the vacuum de-gassing tanks, a secondary filter adopts a plate and frame type oil filter element and is connected in parallel with the two ends of the first ball valve through the pipeline,a second ball valve and a third ball valve are respectively arranged at an oil inlet and an oil outlet of the secondary filter, and an overflow port of the secondary filter is connected with an inletof the oil inlet pump through an oil return pipe. The fully-enclosed transformer insulating oil treatment system provided by the invention has the benefit that not only can water molecules, acid-basesulfur and other components in insulating oil be removed, but also rigid matters of which the particle size is less than 0.5 [mu]m, flexible particulate matters of which the particle size is more than 0.5 [mu]m and carbonized matters can be filtered, so that the quality of the insulating oil is improved.

Description

technical field [0001] The invention relates to an insulating oil treatment system, in particular to a fully enclosed transformer insulating oil treatment system. Background technique [0002] At present, the transformer insulating oil filter system adopts single-stage or double-stage vacuum oil filter to filter oil. The vacuum oil filter can remove the water molecules in the insulating oil and also take away part of the acid, alkali and sulfur components, but for The removal of impurities such as particulate matter is not satisfactory. Since most filter elements can only filter rigid particles above 0.5 μm, rigid substances smaller than 0.5 μm and flexible particles larger than 0.5 μm cannot be filtered out, especially carbonized substances, many of which are equal to the size of nanometers. It is very difficult to filter out all of them. When the carbonized substances accumulate too much between the conductors in the oil, it is easy to cause a short circuit. Although the...

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Problems solved by technology

[0002] At present, the transformer insulating oil filter system adopts single-stage or double-stage vacuum oil filter to filter oil. The vacuum oil filter can remove the water molecules in the insulating oil and also take away part of the acid, alkali and sulfur components, but for Removal of impurities such as particles is not satisfactory

Since most filter elements can only filter rigid particles above 0.5 μm, rigid substances smaller than 0.5 μm and flexible particles larger than 0.5 μm cannot be filtered out, especially carbonized substances, many of which are equal to the size of nanometers. It is very difficult to filter out all of them. When the carbonized substances accumulate too much between the conductors in the oil, it is easy to cause a short circuit

Although the fiber mesh of the filter element can also absorb trace particles, due to the small number of fiber layers, the adsorption capacity is still very limited

According to the insulating oil with a voltage level above 750KV, it is difficult to pass the filter

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