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Time：2025-04-02 10:56:29 Reading volume：
Industrial oil purifier is a device used to remove solid impurities, water, gas and other pollutants from oil. It is widely used in the purification of lubricating oil, hydraulic oil, transformer oil, fuel oil and other oil products. Its working principle is mainly based on physical filtration and separation technology, which can be divided into the following common types and their working principles:
- Working principle: solid particles in oil are intercepted through the pores of filter materials (such as filter paper, filter cloth, metal mesh, sintered filter element, etc.).
- Process: Contaminated oil passes through the filter material under pressure (gravity or pumping), particles are trapped on the surface or inside of the filter material, and clean oil passes through.
- Features: suitable for removing tiny particles (such as above 1μm), but the filter material needs to be replaced or cleaned regularly.
- Working principle: use vacuum negative pressure to separate water and gas in oil.
- Process:
1. Heating: The oil is heated (usually 60~70℃) to reduce viscosity.
2. Vacuum separation: The oil enters the tank, and the water and volatile gases evaporate under low pressure.
3. Condensation: The evaporated water vapor is condensed by the condenser and discharged.
4. Fine filtration: The dehydrated oil is then finely filtered to remove residual particles.
- Features: Highly efficient removal of water (can be reduced to ppm level) and dissolved gas, suitable for transformer oil, turbine oil, etc.
- Working principle: Use centrifugal force to separate impurities of different densities (such as water, metal chips).
- Process: The oil rotates at high speed, and the impurities and water with higher density are thrown to the drum wall, and the clean oil flows out from the center.
- Features: No filter material is required, suitable for highly polluted oil, but the separation effect on tiny particles (such as <5μm) is limited.
- Working principle: Use an electrostatic field to adsorb charged colloidal particles and oxidation products in oil.
- Process: The oil flows through the high-voltage electrostatic field, and the particles are adsorbed by the electrode.
- Features: Suitable for removing colloids and oxides, often used in conjunction with other filtering methods.
- Working principle: Use the coalescing filter element to merge tiny water droplets into large water droplets, and then separate them through the separation filter element.
- Process:
1. Coalescing: The oil passes through the hydrophilic material, and the tiny water droplets coalesce into large water droplets.
2. Separation: The large water droplets settle due to the density difference or are separated by oleophobic filter materials.
- Features: Specially used for the removal of emulsified water (such as fuel oil and aviation hydraulic oil).
- Working principle: Use adsorbents (such as diatomaceous earth, activated clay, molecular sieves) to remove acidic substances, pigments, colloids, etc., in oil.
- Process: The oil flows through the adsorption bed and the adsorbent captures the pollutants.
- Features: Suitable for deep purification (such as regenerating waste oil).
- Filtration accuracy: 1~100μm (depending on the filter material).
- Processing capacity: from a few liters/minute to thousands of liters/hour.
- Applicable oil products: lubricating oil, insulating oil, fuel oil, etc.
- Power industry: transformer oil dewatering and particle removal.
- Machinery manufacturing: hydraulic system oil purification.
- Petrochemical: fuel oil and lubricating oil regeneration.
- Aerospace: high-precision oil maintenance.
The selection of industrial oil purifiers should be determined based on the type of oil contamination (particles, moisture, gas, etc.), oil characteristics (viscosity, flash point) and purification requirements (such as NAS cleanliness level).
