How does the oil filter purify insulating oil?

The oil purifier purifies the insulating oil mainly by removing water, gas, solid particles and other impurities in to restore and maintain the performance of the insulating oil. The following are the common steps and methods for the oil purifier to purify the insulating oil:

1. Pretreatment

- Sedimentation: Let the insulating oil stand for some time to allow large particles of impurities and water to settle naturally.

- Coarse filtration: Use coarse filtration equipment to remove large particles of impurities and reduce the burden of subsequent fine filtration.

2. Heating

- Heating the oil: Heat the insulating oil to an appropriate temperature (usually 50-60°C) to reduce the viscosity of the oil and improve the filtration efficiency.

- Temperature control: Ensure that the heating temperature is within a safe range to avoid overheating of the oil and oxidation.

3. Vacuum dehydration and degassing

- Vacuum treatment: Introduce the heated insulating oil into a vacuum chamber. In a vacuum environment, water and gas are more easily separated from the oil.

- Spray or thin film technology: Use spray or thin film technology to increase the contact area between the oil and the vacuum and improve the dehydration and degassing efficiency.

4. Fine filtration

- Multi-stage filtration: Use multi-stage filter elements (such as coarse filtration, fine filtration and ultra-fine filtration) to gradually remove solid particles of different sizes.

- Filter element selection: ｓｅｌｅｃｔ the appropriate filter element accuracy according to the degree of contamination of the insulating oil to ensure the filtration effect.

5. Adsorption treatment

- Adsorbent: Use adsorbents (such as silica gel, and activated alumina) to further remove trace moisture and acidic substances in the oil.

- Adsorption tower: Pass the insulating oil through the adsorption tower, and the adsorbent will absorb impurities and moisture in the oil.

6. Cooling

- Cooling oil: After filtration and purification, cool the insulating oil to a suitable temperature for storage and use.

- Temperature monitoring: Ensure that the oil temperature after cooling is within a safe range to avoid affecting the performance of the oil due to excessively high or low temperatures.

7. Detection and monitoring

- Online monitoring: Use online monitoring equipment to monitor various indicators of the oil in real-time (such as moisture content, gas content, particle size, etc.).

- Laboratory testing: Regularly take samples and send them to the laboratory for detailed analysis to ensure that the oil quality meets the standards.

8. Post-processing

- Adding additives: Add antioxidants, anti-wear agents, etc. to the purified insulating oil as needed to enhance the performance of the oil.

- Storage and transportation: Store the purified insulating oil in a clean and dry container to avoid secondary contamination.

9. Equipment maintenance

- Regular cleaning: Regularly clean the filter element, vacuum chamber and other key components of the oil purifier to maintain efficient operation of the equipment.

- ｒｅｐｌａｃｅ consumables: ｒｅｐｌａｃｅ consumables such as filter elements and adsorbents promptly to ensure the filtering effect.

Through the above steps, the oil purifier can effectively purify the insulating oil, remove moisture, gas, solid particles and other impurities, restore and maintain the insulating performance, cooling performance and lubrication performance of the insulating oil, and extend the service life of the oil and equipment.