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Time：2025-02-15 10:50:27 Reading volume：
The principle of removing acetylene from transformer oil vacuum purifiers is mainly based on the combination of vacuum degassing and adsorption filtration. The following is a detailed working principle:
Acetylene (C₂H₂) is one of the common gases in transformer oil, usually produced by faults such as partial discharge, arc or overheating. The presence of acetylene may indicate a serious fault inside the transformer, so it needs to be removed in time.
The transformer oil vacuum purifier removes acetylene from the oil through the following steps:
(1) Heating
- Principle: Heating the transformer oil to a certain temperature (usually 50-60°C) reduces the viscosity of the oil and makes it easier for gases (including acetylene) dissolved in the oil to be released.
- Function: After heating, the solubility of gases such as acetylene is reduced, creating conditions for subsequent degassing.
(2) Vacuum degassing
- Principle: The heated oil is introduced into the vacuum separation tank, and the pressure in the tank is reduced to an extremely low level (usually 0.1-1 kPa) through a vacuum pump. Under low pressure, gases such as acetylene dissolved in oil are rapidly precipitated.
- Function:
- Gases such as acetylene escape from the oil and enter the vacuum system.
- The gas is discharged from the equipment through a vacuum pump.
(3) Atomization or filming
- Principle: In the vacuum separation tank, the oil is atomized or formed into a film to increase the contact area between the oil and the vacuum, thereby accelerating the release of gases (including acetylene).
- Function: Improve the degassing efficiency and ensure that gases such as acetylene are completely removed.
(4) Adsorption filtration
- Principle: After degassing, the oil passes through an adsorbent (such as activated alumina, molecular sieve, or special adsorption filter element) to further remove residual trace acetylene and other impurities.
- Function: The adsorbent has a strong adsorption capacity for gases such as acetylene, ensuring that the acetylene content in the oil is reduced to a safe range.
(5) Precision filtration
- Principle: The oil passes through a high-precision filter element (usually 1-5 microns) to remove solid particles and other contaminants. - Function: Ensure the cleanliness of the oil while preventing impurities from affecting the effect of the adsorbent.
- Heating system: used to heat the oil and reduce viscosity.
- Vacuum separation tank: Provide a low-pressure environment to allow gas to precipitate from the oil.
- Vacuum pump: Maintain the low-pressure state of the vacuum separation tank and discharge the gas.
- Adsorption filter element: Adsorb residual acetylene and other gases.
- Precision filter element: Filter solid particles to ensure the cleanliness of the oil.
- Through the treatment of the vacuum oil purifier, the acetylene content in the transformer oil can be significantly reduced, usually reaching the following standards:
- Acetylene content: ≤1 ppm (according to the transformer operation requirements).
- Total gas content in the oil: ≤0.1%.
- Temperature control: The heating temperature should not be too high to avoid oil quality deterioration.
- Vacuum degree: Ensure that the vacuum degree is low enough to improve the degassing efficiency.
- Adsorbent replacement: Regularly ｒｅｐｌａｃｅ the adsorbent to ensure the adsorption effect.
- Oil quality detection: Detect the acetylene content in the oil before and after treatment to ensure the treatment effect.
The transformer oil vacuum oil purifier effectively removes acetylene from the oil through a combination of heating, vacuum degassing, atomization, adsorption filtration and precision filtration. This method not only removes acetylene but also improves the insulation performance and cleanliness of the oil, ensuring the safe operation of the transformer.
