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Time：2025-07-08 15:05:27 Reading volume：
High vacuum oil purifier is a kind of equipment specially used for deep purification of insulating oil or industrial oil such as transformer oil, lubricating oil, turbine oil, etc. It removes moisture, gas, impurities and acidic components in the oil through high vacuum dehydration, degassing, precision filtration and other technologies, and restores the insulation performance and chemical stability of the oil.
The core purification process of high vacuum oil purifier includes:
1. Heating system: The oil is heated to 50~70℃ (reducing viscosity and improving dehydration efficiency).
2. Vacuum dehydration: In a high vacuum environment of -0.095~-0.1MPa (absolute pressure ≤5mbar), free water and dissolved water in the oil evaporate and are pumped out by the vacuum pump.
3. Degassing: Remove oxygen, nitrogen, acetylene and other gases dissolved in the oil to prevent oil oxidation.
4. Precision filtration: Remove particulate impurities through 1~5μm high-precision filter element.
5. Optional adsorption regeneration: Some models are equipped with silica gel and activated alumina adsorption towers to reduce acid value (suitable for aged oil).
| Features | Description |
|-------------------------|-------------------------------------------------------------------------|
| Ultra-high vacuum | The vacuum degree can reach ≤5mbar, ensuring deep dehydration (water ≤3ppm). |
| Efficient degassing | The gas content can be reduced to ≤0.1%, improving the insulation strength of the oil (breakdown voltage ≥70kV). |
| Multi-stage filtration | Pre-filtration (10μm) + fine filtration (1~5μm) + coalescence filtration (optional). |
| Automation control | PLC+touch screen, automatic adjustment of temperature and vacuum degree, with alarm protection (overload, high temperature, low oil level). |
| Energy saving and environmental protection | Use low-energy vacuum pumps (such as Roots pump + rotary vane pump combination) to reduce operating costs. |
| Multi-function expansion | Optional online moisture detection, acetylene removal, and acid value regeneration modules. |
(1) Power industry (transformer oil treatment)
- New oil treatment: remove moisture and impurities mixed in during transportation and storage.
- Inspection and maintenance: oil purification before transformer installation and oil change.
- Fault recovery: regeneration of damp or slightly aged oil (such as acid value ≤0.1mg KOH/g).
(2) Industrial lubricant purification
- Dehydration and impurity removal of hydraulic oil, gear oil, and turbine oil to extend equipment life.
(3) UHV & nuclear power field
- Requires extremely high oil cleanliness (water ≤3ppm, particle size below NAS level 5).
| Comparison items | High vacuum oil purifier | Ordinary vacuum oil filter |
|------------------|-------------------------------------|----------------------------------|
| Vacuum degree | ≤5mbar (ultra-high vacuum) | 10~50mbar (general vacuum) |
| Dehydration capacity | Moisture ≤3ppm | Moisture ≤10ppm |
| Degassing effect | Gas content ≤0.1% | Gas content ≤0.5% |
| Applicable oils | Ultra-high voltage transformer oil, precision industrial oil | Ordinary transformer oil, lubricating oil |
| Price | Higher (RMB 200,000~1 million+) | Lower (RMB 50,000~300,000) |
- Vacuum degree: ≤5mbar (absolute pressure) is the high vacuum standard.
- Processing capacity: 500~15,000L/h (ｓｅｌｅｃｔ according to the transformer oil volume).
- Purification index:
- Moisture ≤3ppm (required for ultra-high voltage transformers).
- Gas ≤0.1%.
- Breakdown voltage ≥70kV.
- Particle size NAS 1638 level 5 or below.
- Additional functions: acetylene removal, acid value regeneration, online monitoring.
High vacuum oil purifier is a must-have equipment for high-end fields such as ultra-high voltage transformers, ultra-high voltage DC projects, and nuclear power. Its deep dehydration and degassing capabilities far exceed those of ordinary oil filters. When selecting a model, you need to focus on vacuum degree, processing capacity, and degree of automation, and choose the appropriate configuration according to the type of oil pollution (moisture, gas, acid value).
