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Time：2025-07-04 13:43:04 Reading volume：
The type of oil filter used in power plants needs to be selected based on the oil type (such as turbine oil, insulating oil, lubricating oil, etc.), degree of contamination and treatment requirements. The following are common types of oil filters and their applicable scenarios:
- Principle: Physically filter impurities and moisture through filter cloth or filter paper.
- Applicable scenarios:
- Treat low-viscosity oils (such as turbine oil, transformer oil).
- Remove mechanical impurities and a small amount of moisture.
- Features: Simple structure, low cost, but low filtration accuracy (usually 5-10 microns), and frequent replacement of filter media is required.
- Principle: Heat the oil in a vacuum environment, evaporate the water, and remove particulate matter through the filter element.
- Applicable scenarios:
- Treat insulating oil with high water content (such as transformer oil).
- High-precision dehydration and degassing (water content can be reduced to less than 10ppm).
- Features:
- High efficiency dehydration and degassing, high filtration accuracy (up to 1-3 microns).
- Suitable for the purification of oil used in high-voltage electrical equipment.
- Principle: Use centrifugal force to separate water and impurities in oil.
- Applicable scenarios:
- Treat a large amount of oil containing water and solid pollution (such as lubricating oil, fuel oil).
- Suitable for the preliminary treatment of heavily polluted oil products.
- Features: No filter element is required, the processing volume is large, but the accuracy is low (usually > 10 microns).
- Principle: Use the coalescing filter element to merge tiny water droplets into large droplets, and then remove them through the separation filter element.
- Applicable scenarios:
- Treat water-contaminated oil with severe emulsification (such as turbine oil, hydraulic oil).
- Can quickly reduce the water content.
- Features: High dehydration efficiency, but weak filtering ability for solid impurities.
- Principle: Use an electrostatic field to adsorb tiny particles such as colloids and oxides in oil.
- Applicable scenarios:
- Oil for precision equipment (such as gas turbine lubricating oil).
- Remove submicron particles (below 0.1 micron).
- Features: Suitable for ultra-fine filtration, but the processing speed is slow.
- Principle: Use polymer membrane materials to selectively separate pollutants.
- Applicable scenarios:
- Ultra-pure oil requirements (such as oil for nuclear power equipment).
- Remove soluble impurities or acidic substances.
- Features: Extremely high precision (up to nanometer level), but high cost.
1. Transformer oil/insulating oil: Preferentially choose a vacuum oil filter (dehydration and degassing) or an electrostatic oil filter (fine purification).
2. Turbine oil/lubricating oil: Coalescing separation or vacuum oil filter (when the water content is high), combined with plate and frame pre-filtration.
3. Fuel oil/heavy oil: centrifugal or plate and frame oil filter (large processing capacity, low cost).
4. High precision requirements: membrane filtration or electrostatic oil filter.
Notes
- Regularly test the oil quality (water content, particle size, acid value, etc.) to adjust the filtration plan.
- Some oil filters need to be equipped with a heating system (such as a vacuum oil filter) to improve efficiency.
- Explosion-proof equipment should be selected for explosion-proof requirements (such as fuel oil treatment).
Depending on specific needs, power plants may combine multiple oil filters to form a multi-stage filtration system to achieve the best purification effect.
