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Time：2025-04-08 15:50:24 Reading volume：
Transformer waste oil is a hazardous waste, containing a variety of harmful substances, such as polycyclic aromatic hydrocarbons, benzene series, heavy metals and acidic substances produced by aging. If improperly handled, it will cause serious pollution to the soil, water sources and air. Therefore, scientific and compliant methods must be used for treatment. The following are specific treatment processes and precautions:
Classification collection
Classify the waste oil according to its source and nature to avoid mixing different types of waste oil, which increases the difficulty of treatment.
Safe temporary storage
Use special sealed containers to prevent leakage and volatilization.
The temporary storage area must be rainproof, sunproof, and fireproof, and have obvious hazardous waste signs.
Check the sealing of the container regularly to prevent waste oil leakage from polluting the environment.
Dehydration and degassing
Remove moisture and gas from waste oil through vacuum heating or centrifugal separation technology to reduce the difficulty of subsequent treatment.
Filtration and impurity removal
Use filter paper, a filter element, or a centrifuge to remove mechanical impurities and particulate matter to improve the purity of waste oil.
ｓｅｌｅｃｔ the appropriate regeneration process according to the quality of waste oil:
Physical regeneration
Adsorption method: Use adsorbents such as activated carbon and silica gel to remove polar substances and impurities in waste oil.
Distillation method: Separate light components and heavy components in waste oil through high-temperature distillation to recover base oil.
Chemical regeneration
Hydrogenation refining: Under high temperature and high pressure, remove impurities such as sulfur, nitrogen, and oxygen in waste oil through a hydrogenation reaction to improve oil quality.
Acid and alkali refining: Use chemical reagents such as sulfuric acid and sodium hydroxide to neutralize acidic substances and remove colloids and asphaltene.
Biological regeneration
Use microorganisms to degrade organic pollutants in waste oil, which is suitable for low-concentration waste oil treatment.
The regenerated transformer oil needs to be strictly tested to ensure compliance with national standards (such as GB/T 7595-2017). The main test indicators include:
Electrical properties: breakdown voltage, dielectric loss factor.
Physical and chemical properties: acid value, moisture, flash point, viscosity.
Pollution degree: particle size, metal ion content.
Utilization of recycled oil
Recycled oil that meets the standards can be used in low-voltage electrical equipment or as fuel oil.
High-quality recycled oil can be reused in transformers after deep treatment.
Disposal of waste oil that cannot be recycled
Entrust a qualified hazardous waste disposal unit to incinerate, landfill, or solidify.
Ensure that the disposal process complies with the requirements of the "Hazardous Waste Business License Management Measures".
Compliance
Waste oil treatment must comply with the "Law of the People's Republic of China on the Prevention and Control of Environmental Pollution by Solid Wastes" and relevant environmental protection laws and regulations. Illegal dumping or private disposal is strictly prohibited.
Safety protection
Fire prevention, explosion prevention, and anti-toxic measures must be taken during the treatment process, and operators must wear protective equipment.
Recording and tracing
Establish a waste oil treatment ledger to record the source, quantity, treatment method and destination of the waste oil to ensure that the entire process is traceable.
Entrust professional institutions: It is recommended to hand over waste oil to professional companies with hazardous waste management licenses to ensure compliance and safety.
Regular training: Enterprises should strengthen the environmental awareness and operation skills training of waste oil management personnel to avoid environmental pollution caused by improper operation.
Through scientific treatment and compliant disposal, transformer waste oil can be used as a resource, reduce environmental pollution, and reduce corporate environmental risks.
