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Time：2025-04-08 14:47:10 Reading volume：
The transformer oil regeneration process is a technology that uses physical, chemical, or physicochemical methods to remove deterioration products (such as oxides, acidic substances, moisture, impurities, etc.) generated by long-term operation in transformer oil, and restore or improve its electrical properties and physical and chemical indicators. This process aims to extend the service life of transformer oil, reduce operating costs, and reduce environmental pollution.
Principle: Use the adsorption effect of adsorbents (such as silica gel, activated alumina, kaolin, etc.) to remove deterioration products and impurities in the oil.
Process flow:
Pretreatment: Heat the oil to be regenerated to a certain temperature (such as 40-50℃) to reduce viscosity and improve filtering effect.
Adsorption filtration: Pass the oil through a filter equipped with adsorbent or fully mix and stir with the adsorbent to adsorb deterioration products.
Separation: Separate the adsorbent and the purified oil by clarification or filtration.
Features:
Suitable for transformer oil with mild to moderate deterioration.
The process is simple, easy to operate, and low-cost.
It can effectively remove acidic substances, moisture and impurities in the oil and improve the electrical properties of the oil.
Principle: Remove oxidation products and impurities in the oil through sulfuric acid treatment, then neutralize the remaining acid with alkali, and finally wash with water to neutralize.
Process flow:
Acid treatment: Add sulfuric acid to the oil, stir and let it stand so that the deterioration products react with sulfuric acid to form acid slag.
Alkali neutralization: Add alkali solution to neutralize the remaining acid to generate salt and water.
Water washing: Wash the oil with water to remove residual salt and moisture.
Features:
Suitable for severely deteriorated transformer oil.
The treatment effect is significant, but the process is complicated and the operation requirements are high.
The waste acid, waste alkali and wastewater generated need to be properly handled to avoid environmental pollution.
Principle: Under high temperature and vacuum conditions, the deterioration products in the oil are decomposed into low molecular gas and discharged through the vacuum system.
Process flow:
Heating: Heat the oil to a high temperature (such as 300-400℃).
Vacuum treatment: Under vacuum conditions, the deterioration products are decomposed and volatilized.
Condensation recovery: The volatilized gas is recovered or treated through the condensation system.
Features:
Applicable to severely deteriorated transformer oil.
The treatment effect is thorough and can effectively remove the deteriorating products in the oil.
The equipment is complex, the energy consumption is high, and the cost is high.
Principle: The deterioration products in the oil are separated from the oil by the selective dissolution of the solvent.
Process flow:
Extraction: Mix the oil with the solvent to dissolve the deterioration products in the solvent.
Separation: Separate the solvent and the deterioration products from the oil by sedimentation or centrifugal separation.
Solvent recovery: Recover the solvent by distillation and other methods and recycle it.
Features:
Applicable to specific types of deterioration products.
The treatment effect is good, but the selection and recovery of the solvent are the key.
The process is complex and the cost is high.
Nanomaterial regeneration: Use the high specific surface area and strong adsorption capacity of nanomaterials (such as nano-alumina, nano-silica gel, etc.) to remove deterioration products in the oil.
Biological regeneration: Use the catalytic action of microorganisms or enzymes to decompose deterioration products in the oil.
Membrane separation technology: Use the selective permeability of the membrane to separate deterioration products and impurities in the oil.
Oil quality: ｓｅｌｅｃｔ a suitable regeneration process according to the degree of deterioration of the transformer oil and the type of deterioration products.
Treatment effect: Evaluate the improvement effect of different processes on oil quality indicators (such as acid value, dielectric loss factor, breakdown voltage, etc.).
Economic efficiency: Consider the equipment investment, operating cost and maintenance cost of the process.
Environmental protection: Evaluate the difficulty and cost of treating waste residues, wastewater and waste gas generated by the process.
Quality standard: The quality of recycled oil should comply with relevant standards (such as GB/T 7595-2017 "Quality of transformer oil in operation").
Scope of use: Recycled oil can be used for equipment that does not require high oil quality, or mixed with new oil.
Monitoring and maintenance: Recycled oil should be monitored during use, and oil quality indicators should be tested regularly to ensure safe operation of the equipment.
