What are the methods for transformer oil treatment?

The main purpose of transformer oil treatment is to remove impurities, moisture and gas from the oil and restore its insulation and cooling properties. Common treatment methods include the following:

1. Filtration treatment

- Mechanical filtration: Remove solid particles and impurities through filter elements or filter paper. Common equipment includes plate and frame oil purifiers and vacuum oil purifiers.

- Precision filtration: Use high-precision filter elements to remove tiny particles, suitable for occasions with high cleanliness requirements.

2. Vacuum dehydration

- Principle: Under vacuum conditions, the water in the oil evaporates and is extracted. Common equipment includes vacuum oil purifiers.

- Advantages: Efficiently remove moisture, suitable for transformer oil with high water content.

3. Heating treatment

- Principle: Reduce the viscosity of the oil by heating, which facilitates the separation of impurities and moisture. It is often used in combination with vacuum dehydration.

- Advantages: Improve dehydration efficiency, suitable for oil with high viscosity in low-temperature environments.

4. Adsorption treatment

- Principle: Use adsorbents (such as silica gel, and activated alumina) to remove moisture, acidic substances and impurities from the oil.

- Advantages: It can effectively remove dissolved water and acidic substances and improve the insulation performance of oil.

5. Centrifugal separation

- Principle: Use centrifugal force to separate water and solid impurities in oil. Common equipment includes a centrifugal oil purifier.

- Advantages: Suitable for processing large amounts of oil with high efficiency.

6. Electrostatic treatment

- Principle: Use an electrostatic field to charge impurities in oil and adsorb them on electrodes. Common equipment includes an electrostatic oil purifier.

- Advantages: It can remove tiny particles and colloidal substances and is suitable for high-precision filtration.

7. Degassing treatment

- Principle: Remove dissolved gas in oil by vacuum degassing or gas replacement. Common equipment includes a vacuum degasser.

- Advantages: Improve the insulation performance of oil and reduce the impact of bubbles on equipment.

8. Chemical treatment

- Principle: Use chemical reagents to neutralize acidic substances in oil or remove specific pollutants.

- Advantages: Suitable for processing severely contaminated oil and requires professional operation.

9. Regeneration treatment

- Principle: Restore the performance of aged oil through adsorption, filtration, chemical treatment and other methods. Common equipment includes oil regeneration device.

- Advantages: Extend the service life of oil and reduce replacement costs.

10. Online treatment

- Principle: Oil treatment is carried out during the operation of the transformer. Common equipment includes an online oil purifier.

- Advantages: No need to stop the machine, ensuring continuous operation of the equipment.

Factors to consider in selecting treatment methods

1. Oil state: ｓｅｌｅｃｔ a suitable treatment method according to the content of impurities, moisture and gas in the oil.

2. Equipment requirements: Consider the operating environment of the transformer and the requirements for oil cleanliness.

3. Treatment efficiency: ｓｅｌｅｃｔ an efficient and fast treatment method to reduce downtime.

4. Cost: Comprehensively consider the treatment cost and effect, and ｓｅｌｅｃｔ a cost-effective method.

There are various methods for transformer oil treatment. Selecting a suitable method can effectively improve the performance of the oil and extend the life of the equipment. Common methods include filtration, vacuum dehydration, heating treatment, adsorption treatment, centrifugal separation, electrostatic treatment, degassing treatment, chemical treatment, regeneration treatment and online treatment.