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TRANSFORMER
RECLASSIFICATION
| Oil
Transformer Retrofilling |
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| Mineral
oil transformers contaminated with less than 50 ppm PCBs can
be reclassified to non-PCB status by draining the PCB-contaminated
oil from the transformer tank and retrofilling the unit with
clean oil. After the requisite 90-day energized period, the
unit will be less than 50 ppm. Transformers that are originally
less than 500 ppm PCBs can be reclassified to less than 50 ppm
for the life of the unit with one single retrofill process.
Transformers containing less than 500 ppm would require more
than one refilling to leach the PCBs from the core. Experience
has shown that 90% of the PCBs are removed from a transformer
core with each retrofill. |
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| On-Site
Mineral Oil Decontamination |
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| When
quantities of oil at a site are greater than 1000 gallons, PCB
Disposal provides our clients with the option of decontaminating
the oil on site using our mobile PCB chemical destruction technology.
Mineral oil that contains little or no water, detergent or solvent
contaminants, can be decontaminated to less than 2 ppm PCBs.
The process involves metallic sodium and a catalyst added to
the oil. The exothermic reaction produces sodium chloride, sodium
hydroxide and a polyphenylene polymer and is terminated by a
water quench. The oil mixture can be sent to a waste oil facility
for re-refining and reuse. |
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| Improving
Transformer Oil Dielectric |
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| In
those cases where a transformer contains unacceptable levels
of water or other trace contaminants, PCB Disposal can improve
the oil quality by processing the oil on-site using our mobile
technology. The transformer oil is drained into our processing
unit where it is degassified and filtered to improve it's properties
including dielectric strength. PCB Disposal services many utilities
to keep their transformers operating optimally. |
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