Electrical Engineering Instute Nikola Tesla Koste Glavinica 8a, Belgrade, Serbia www.ieent.org [email protected] Decontamination of PCB Contaminated Electrical Equipment Using INT Process for Simultaneous Dechlorination, Desulphurization and Regeneration of Mineral Insulating Oils Implementation period: 2015-2018 Location: Republic of Serbia, Power Sector Task: Eliminate PCB’s in RS acc. to NIP PCB’s in Electrical Equipment C(PCB) = 50-500 mg/kg C (PCB) >500 mg/kg Stockholm Convention PCB limited to 50 mg/kg in electrical equipment in service New equipment and oils PCB free Sources of PCB Contamination • Oil treatments (oil tanks, machines for oil treatment) • Oil change and topping up (oil tanks, machines for oil treatment) • Repair of transformers (TR workshops and factories, oil tanks) Section 1 Section 2 Section 3 Section 4 Section 5 Waste 1 (used reagents and inorganic chlorides, without PCB) Waste 2 (used adsorbent with traces of oil without PCB) Mixing &Heating PCB Contaminated Oil Oil without PCB re-refined, ready to use in el.equipment Reagents preparation Separation (oil from reagents) Oil regeneration (purification by adsorbents) Oil reconditioning (removal of moisture and particles) Chemical Reactions Dechlorination process Desulfurization, oil re-refining INT patented technology (RS 53510) for Simultaneous Oil Dechlorination, Desulphurization and Regeneration of Mineral Insulating Oils • Removal of PCB, Corrosive Sulphur and Oil ageing products • Improved Oil properties after treatment PCB Decontamination Unit Capacity: 1500 -2000 kg/day PCB Conversion 0 100 200 300 400 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 oil batch PCB initial, ppm 0 5 10 15 20 25 30 35 40 45 50 PCB final, ppm C PCBo, ppm C PCB fin., ppm Results of PCB Decontamination Process flow On Site Laboratory PCB BDV DDF IFT CONCLUSION • INT process is efficient in the removal of PCB, corrosive sulphur and ageing products from mineral insulating oils • After treatment Oils and transformers have “extended life” and improved properties for further use • INT process can be used for treatment of mineral oils and equipment after “end of life” (waste treatment) J. Lukić*, J. Janković, D. Mihajlović, V. Vasović, S. Milosavljević *[email protected], +381648259711