Vacuum Oil Purifier O&M Practice for Treatment of Degraded Insulating Oil

Degraded insulating oil is a common operational issue for long-running power transformers, reactors and high-voltage power equipment. Under sustained electrical stress, thermal circulation, environmental humidity and oxidation aging, qualified insulating oil gradually deteriorates, accompanied by increased water content, dissolved gas accumulation, fine particle contamination and rising acid value. Severe oil degradation leads to decreased dielectric strength, poor heat dissipation and unstable insulation performance, posing hidden threats to power system safety. Many power enterprises adopt irregular oil treatment and passive maintenance, resulting in incomplete degradation remediation, repeated oil quality failure and shortened oil service life. Standardized vacuum oil purifier operation and maintenance practices provide scientific guidelines for degraded oil purification, realizing thorough regeneration of deteriorated insulating oil and long-term stable oil quality management for power equipment.

Standard pre-operation inspection ensures targeted degraded oil treatment. Before starting purification for degraded insulating oil, standardized O&M procedures require comprehensive equipment status checking and oil quality parameter testing. Operators need to detect key indicators of degraded oil including water content, gas concentration, turbidity, acid value and particle cleanliness to confirm the degradation degree and pollution type. Corresponding purification parameters including vacuum degree, heating temperature and circulating flow rate are adjusted based on actual oil conditions. Meanwhile, daily inspection of the oil purifier’s sealing system, filter elements, vacuum pump and pipeline valves is conducted to eliminate equipment faults and air leakage risks. Complete pre-operation preparation avoids ineffective purification and incomplete degradation treatment, laying a solid foundation for efficient degraded oil remediation.

Scientific operational parameters realize full regeneration of degraded oil. In formal purification practice, standardized running parameters are critical to reverse oil degradation performance. For damp and emulsified degraded oil, stable high-vacuum and low-temperature constant circulation is adopted to avoid secondary oil aging while thoroughly removing emulsified water and dissolved gas. For aging oil with high acid value and colloidal pollution, matched adsorption purification and multi-stage fine filtration are activated to intercept oxidized sludge and adsorb acidic substances. For particle-contaminated degraded oil, graded circulating filtration eliminates micron-level wear debris and carbon residues. Differentiated operational strategies targeting different degradation features ensure comprehensive restoration of oil insulation, cleanliness and chemical stability, achieving thorough regeneration of deteriorated insulating oil.

Real-time operational monitoring prevents secondary oil degradation during treatment. Professional O&M practice emphasizes whole-process dynamic monitoring during degraded oil purification. Operators track real-time changes in system differential pressure, vacuum degree, oil temperature and effluent oil indicators, adjusting operational status timely to avoid local overheating, insufficient vacuum or unbalanced circulation. Continuous online monitoring effectively prevents thermal oxidation and air re-infiltration during the purification process, avoiding secondary degradation of insulating oil caused by improper operation. Strict process control ensures that all degradation problems are completely removed without introducing new pollution, improving the qualification rate of oil regeneration.

Post-operation maintenance and regular cyclic management sustain long-term oil stability. Complete O&M practice includes standardized post-processing maintenance and subsequent preventive management. After degraded oil treatment, the vacuum oil purifier undergoes pipeline cleaning, filter element inspection and moisture-proof sealing storage to maintain equipment performance. Meanwhile, power maintenance teams establish regular oil quality sampling and cyclic purification mechanisms. Regular minor purification and performance testing are carried out for operating insulating oil to eliminate early degradation trends before serious quality deterioration. This whole-cycle O&M mode changes passive fault handling into active preventive maintenance, effectively avoiding repeated degradation of insulating oil and reducing long-term power maintenance costs.

In conclusion, standardized vacuum oil purifier O&M practices greatly improve the treatment effect of degraded insulating oil. Through scientific pre-operation inspection, targeted parameter operation, whole-process dynamic monitoring and complete post-maintenance management, the practices solve the problems of incomplete degradation treatment and irregular operation in traditional oil remediation. Standardized O&M not only thoroughly restores the comprehensive performance of degraded insulating oil, but also extends oil service life and stabilizes power equipment operation, providing systematic and reliable technical guidance for daily maintenance and oil quality management of power systems.