Regeneration method of transformer insulating oil

The regeneration method of transformer insulating oil aims to remove aging products, moisture and impurities in the oil and restore its insulation performance and chemical stability. Common regeneration methods include:

1. Physical regeneration method

- Filtration method:

- Principle: Remove solid impurities and moisture through filter paper or filter element.

- Equipment: Plate and frame oil purifier, pressure oil purifier.

- Advantages: simple operation and low cost.

- Disadvantages: Unable to remove soluble impurities.

- Centrifugal separation method:

- Principle: Use centrifugal force to separate moisture and solid impurities in oil.

- Equipment: Centrifugal oil purifier.

- Advantages: Fast processing speed.

- Disadvantages: High equipment cost and complex maintenance.

- Vacuum dehydration method:

- Principle: Heat the oil in a vacuum environment to evaporate moisture and gas.

- Equipment: Vacuum oil purifier.

- Advantages: Effectively remove moisture and gas.

- Disadvantages: High energy consumption.

2. Chemical regeneration method

- Adsorption method:

- Principle: Use adsorbents (such as activated alumina, silica gel, molecular sieves) to adsorb aging products and acidic substances in the oil.

- Equipment: adsorption tower.

- Advantages: Good regeneration effect.

- Disadvantages: The adsorbent needs to be replaced regularly, and the cost is high.

- Acid-base treatment method:

- Principle: Remove acidic substances and impurities in the oil through acid washing and alkali washing.

- Equipment: Acid-base treatment device.

- Advantages: Acidic substances can be effectively removed.

- Disadvantages: Complex operation and easy to cause secondary pollution.

- Oxidation method:

- Principle: Use oxidants (such as hydrogen peroxide) to oxidize aging products in the oil.

- Equipment: Oxidation reactor.

- Advantages: Significant regeneration effect.

- Disadvantages: Harsh operating conditions and high cost.

3. Combined regeneration method

- Physical-chemical combined method:

- Principle: Combine physical and chemical methods, first remove moisture and solid impurities by physical methods, and then remove soluble impurities by chemical methods.

- Equipment: Combined oil purifier.

- Advantages: Comprehensive regeneration effect.

- Disadvantages: Complex equipment and high cost.

Regeneration steps

1. Pretreatment: Filter to remove solid impurities and moisture.

2. Chemical treatment: Use adsorbents or chemical reagents to remove soluble impurities.

3. Post-treatment: Further purify the oil by vacuum dehydration or filtration.

Precautions

1. Safe operation: Chemical reagents are corrosive and protective equipment must be worn.

2. Environmental protection requirements: Environmental protection regulations must be followed when handling waste liquid and waste adsorbents.

3. Regular testing: The electrical and chemical properties of the oil must be tested after regeneration.

By choosing a suitable regeneration method, the service life of the transformer insulating oil can be effectively extended to ensure the safe operation of the equipment.