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Time：2025-07-30 13:45:39 Reading volume：
Transformer oil treatment equipment is primarily used to purify, dry, degas, and regenerate transformer oil to ensure its insulation properties, chemical stability, and extend its service life. Depending on the purpose and method of treatment, transformer oil treatment equipment can be divided into the following categories:
- Principle: Utilizes centrifugal force generated by high-speed rotation to separate water and solid impurities from oil.
- Application: Suitable for removing mechanical impurities such as free water, metal particles, and dust from oil.
- Features:
- Fast processing speed, suitable for large flow rates.
- Limited effectiveness in removing dissolved water and micro-colloidal impurities.
- Principle: Oil is heated in a vacuum environment, and water, gases (such as oxygen and nitrogen), and light hydrocarbons are removed through reduced pressure evaporation.
- Application:
- Deep dehydration (can reduce water content to below 10 ppm).
- Removes dissolved gases, improving the oil's dielectric strength.
- Features:
- Can also filter solid impurities (equipped with a precision filter element).
- Suitable for regenerating high-voltage transformer oil.
- Principle: Uses filter paper or membrane under pressure to intercept solid particles and some water in the oil.
- Applications:
- Removes fine particles (such as carbon black and fiber) from the oil.
- Suitable for pre-treatment of lightly contaminated oil.
- Features:
- Simple structure and low cost.
- Requires frequent filter media replacement and cannot degas.
- Principle: Uses adsorbents (such as silica gel, activated alumina, and molecular sieves) to remove acidic substances, colloids, and oxides from the oil.
- Applications:
- Regeneration of aged oil (reducing acid value and removing polar compounds).
- Improves oil color and chemical stability.
- Features:
- Can restore the physical and chemical properties of the oil, but the adsorbent needs to be replaced regularly.
- Principle: Uses a high-voltage electrostatic field to charge and coalesce colloidal particles and water in the oil, which is then removed through filtration.
- Applications:
- Treats micron-sized particles and emulsified water.
- Suitable for precision purification of ultra-high voltage transformer oil.
- Features:
- No heating required, low energy consumption.
- Requires a high operating environment.
- Principle: A coalescing filter element combines tiny water droplets into larger droplets, which are then separated by a separation layer.
- Applications:
- Removes emulsified water from oil (when the water content is high).
- For better results, use in conjunction with a vacuum oil purifier.
- Function: Real-time monitoring of oil parameters such as moisture, gas content, and particle size, and automatically initiates treatment procedures.
- Technology:
- Integrated sensors, vacuum degassing modules, and filtration units. - Commonly used in smart substations or critical power equipment.
1. Contamination Type:
- Solid impurities → Centrifugal/Pressure Oil Purifier.
- Moisture → Vacuum Oil Purifier or Coalescing Separator.
- Gases → Vacuum Degassing Equipment.
- Aging Products → Adsorption Regeneration Equipment.
2. Treatment Efficiency:
Highly contaminated oil requires a multi-stage process (e.g., centrifugal filtration followed by vacuum dehydration).
3. Oil Volume Requirement:
For high flow rates, choose a centrifugal or vacuum oil purifier; for smaller scales, choose a plate-and-frame type.
Notes
- Treated oil must be tested for breakdown voltage, moisture content, acidity, and other indicators to ensure compliance with standards (e.g., IEC 60422 or GB/T 7595).
- Flammable oil handling requires an explosion-proof design to avoid high temperatures or sparks.
Rational selection of equipment or a combination of solutions based on the degree of transformer oil contamination and performance requirements can significantly improve oil quality and reduce maintenance costs.
