Detailed Explanation of Transformer Oil Purification Process

The purity of transformer oil has a vital impact on the performance and life of the transformer. Transformer oil purification is a key measure to ensure the safe operation of the transformer and extend the service life of the equipment. During long-term use, transformer oil will absorb pollutants such as moisture, impurities, and gases, which will affect the insulation performance and cooling effect, and may even cause transformer failure. Therefore, it is particularly important to purify transformer oil regularly.

Preliminary Preparation for Transformer Oil Purification

Preliminary preparation is the basis for ensuring the smooth progress of transformer oil purification work, covering the inspection and arrangement of equipment, site, personnel and oil samples.

Equipment Inspection & Debugging

Before starting transformer oil purification, it is an essential step to conduct a comprehensive inspection and debugging of the oil filter equipment used. Before using the transformer oil dehydrator and transformer oil regeneration filter equipment produced by YUNENG, it is necessary to ensure that all parts of the equipment are intact and the performance is stable and reliable. Check whether the filtration system is unobstructed, whether the heating system can operate normally, whether the vacuum system can reach the predetermined vacuum degree, and whether the control system is sensitive and accurate. At the same time, prepare the corresponding auxiliary tools and materials, such as sealing pads, connecting pipes, cleaning tools, etc. that meet the requirements of the equipment, to ensure the sealing and stability of the equipment connection.

Site Layout & Safety Protection

It is crucial to choose a suitable site for transformer oil purification. The site should be spacious, well-ventilated and flat to facilitate the placement and operation of the equipment. Clean the site, remove debris and flammable materials, and provide a safe and tidy working environment for purification operations. In addition, comprehensive safety protection measures must be set up, such as setting up obvious warning signs around the site to prevent unauthorized personnel from entering by mistake; equipping with safety equipment such as fire extinguishers and explosion-proof lamps to deal with possible emergencies.

Personnel Division of Labor & Training

Reasonable division of labor and clear responsibilities are the key to ensuring the smooth progress of purification work. Operators must have corresponding professional knowledge and operating skills and be familiar with the performance and operating procedures of the equipment. Detailed safety training is provided to operators to make them understand the possible risks and corresponding preventive measures in the transformer oil purification process, such as preventing oil leakage and avoiding accidents caused by equipment failure, so as to ensure the safety of the operation process.

Oil Sample Collection & Testing

Oil sample collection and testing are important links in the preliminary preparation. Use professional oil sample collection tools and take out an appropriate amount of oil samples from the transformer according to the standard collection method. During the collection process, care should be taken to avoid oil sample contamination to ensure that the collected oil sample can truly reflect the actual situation of the transformer oil. The collected oil samples are sent to a professional laboratory for testing. The test indicators include moisture content, impurity particle size, acid value, breakdown voltage, etc. Through these test indicators, the degree of contamination and aging of the transformer oil can be accurately evaluated, providing a scientific basis for subsequent purification treatment.

Transformer Oil Purification Process

The transformer oil purification process is a systematic process involving the operation of multiple key links. The following are the specific implementation steps:

Equipment Connection

Equipment connection is the starting stage of the purification process and requires extra caution. Tightly connect the oil inlet pipe to the oil drain valve of the transformer to ensure that there is no leakage at the connection. The oil outlet pipe must be accurately connected to the oil pillow or other designated oil filling port of the transformer, and the sealing of the connection must also be ensured. Take the YL series mobile precision oil purifier produced by YUNENG as an example. The equipment adopts a multi-stage filtration system, which is easy to operate and maintain. During the connection process, you can refer to its instructions for use, reasonably install and connect the pipes to ensure that the oil can flow smoothly.

Start The Equipment

When starting the equipment, strictly follow the operation manual of the equipment. Taking YUNENG’s transformer oil dehydrator as an example, first start the power supply of the oil filter machine, let the equipment run for a short time without load, and check whether the operating status of the equipment is normal, such as the direction of the motor, the sound of the pump, etc. Then, open the oil drain valve of the transformer to allow the transformer oil to flow into the oil filter equipment under the action of the internal and external pressure difference. At this time, the equipment’s primary filter begins to work. It can filter out large particles of impurities in the oil and prepare for subsequent fine filtration.

Heating, Dehydration & Degassing

The heating system of the equipment is used to heat the oil, and the heating temperature is generally controlled at 45℃ – 65℃. For example, YUNENG transformer oil purification equipment uses advanced heating technology to evenly heat the oil, making the water and gas in the oil easier to vaporize. During the heating process, pay close attention to the temperature changes of the oil to avoid excessive temperature causing oil aging or deterioration, and also prevent the temperature from being too low to affect the dehydration and degassing effect.

Vacuum Separation

The heated oil enters the vacuum separator, and a low-pressure environment is formed inside the vacuum separator. The oil will form a mist or film in it, thereby increasing the contact area between the oil and the vacuum environment, so that the water and gas can be vaporized more quickly and discharged by the vacuum system. YUNENG double stage vacuum oil purifier excels in vacuum separation technology. Its efficient vacuum system can ensure the effective separation of water and gas in the oil and improve the purity of the oil.

Precision Filtration

The oil after vacuum separation contains tiny impurity particles, which need to be filtered through a fine filter. YUNENG’s transformer oil regeneration and filtration equipment is equipped with a high-precision filter element, which can effectively remove tiny particles of impurities in the oil, improve the filtration accuracy of the oil, and ensure that the oil reaches the required purity standard. During the filtration process, the filter element should be replaced in time according to the instructions of the equipment and the filtration conditions of the oil to ensure the filtration effect.

Circulation Treatment

The purified oil returns to the oil pillow or other designated location of the transformer to complete a cycle. According to the quality requirements and contamination degree of the oil, multiple circulation treatments can be carried out. During the circulation process, various indicators of the oil, such as moisture content, impurity particle size, etc., should be continuously monitored to ensure that the oil can achieve the expected purification effect.

Post-work

Post-work is an important link to ensure the transformer oil purification effect and the long-term stable operation of the equipment.

Oil Sample Re-inspection

After the purification procedure is completed, collect transformer oil samples again and test them according to the same test methods and indicators as in the previous period. By comparing the oil sample test results before and after purification, the purification effect can be intuitively evaluated. If the test results show that the oil still does not meet the specified quality standards, it is necessary to re-purify until the oil quality is qualified.

Equipment Maintenance

After the purification work is completed, turn off the oil filter equipment and cut off the power supply. Thoroughly clean the equipment to remove oil and dust on the surface of the equipment. Check the filter element of the equipment. If the filter element is found to be blocked or damaged, it should be replaced in time. At the same time, maintain and maintain other parts of the equipment, such as lubricating the rotating parts, checking and replacing the wearing parts, etc. Properly store the equipment and prepare for the next use.

Recording & Archiving

Record the time, oil volume, equipment operating parameters, oil sample test results and other information of this transformer oil purification in detail. These records are not only a summary of this purification work, but also provide valuable reference materials for future equipment maintenance and oil management. Organize the records into files and save them according to certain formats and requirements for future reference and analysis.

As a professional oil purification equipment manufacturer, YUNENG produces various types of transformer oil purification equipment, such as transformer oil dehydrators, transformer oil regeneration and filtration equipment, YL series mobile precision oil purifiers, etc., which provide strong support for the purification of transformer oil with advanced technology and reliable quality.

Transformer oil purification is an important part of ensuring the safe and stable operation of the power system. Through strict preliminary preparation, standardized purification operations and perfect post-work, harmful substances such as moisture, impurities, and gases in transformer oil can be effectively removed, the performance of the oil can be restored, and the service life of the transformer can be extended. I hope this article will help you understand the transformer oil purification process. If you have further questions or needs, please feel free to consult professionals.