Removing residual PCB S from transformers

Details Removing residual PCB S from transformers Removing residual PCB S from transformers

1983-11-14

1987-10-13

Fisher, Richard V.

Cleaning and liquid contact with solids

Processes

Including regeneration, purification, recovery or separation...

134 21, 208262, 210694, 210909, B08B 500, B01D 1504

Patent

active

046996672

ABSTRACT:
Disclosed is a method and apparatus for removing residual polychlorinated biphenyls from transformers. A vaporized solvent which forms a low-boiling azeotrope with polychlorinated biphenyls is passed through the transformer. The vaporized azeotrope is removed from the transformer, condensed, and the PCB's in the azeotrope are removed and/or destroyed. The apparatus includes means for vaporizing the solvent which forms the low-boiling azeotrope with the PCB's, a pump means for passing the vaporized solvent through the transformer, a condensing means for condensing the vaporized azeotrope, and treatment means for destroying the polychlorinated biphenyls removed from the transformer in the azeotrope.

REFERENCES:
patent: 3385735 (1968-05-01), Brabrand et al.
patent: 4299704 (1981-11-01), Foss
patent: 4304612 (1981-12-01), Masuda
patent: 4382865 (1983-05-01), Sweeny
patent: 4387018 (1983-06-01), Cook et al.
patent: 4396436 (1983-08-01), Laemmle et al.
patent: 4425949 (1984-01-01), Rowe, Jr.
patent: 4430208 (1984-02-01), Pytlewski et al.

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