To quickly remove PCB oil from a contaminated transformer.
An induction heater 3 for the contaminated transformer 2, a gas supplying unit 4, a cooling container 5 for condensing an evaporated gas from the contaminated transformer 2 by induction heating and a draft fan 6 for inducing the evaporated gas to the cooling container 5 keeping the pressure in a container 1 for treatment of the transformer 2 contaminated by PCB oil at a predetermined pressure and for discharging the gas obtained by removing the PCB oil from the condensed gas to the outside of the system out of the cooling container 5 are attached to the treatment container 1. During treatment, the treatment container 1 is filled with an inert gas of which the oxygen concentration is controlled so as to be 5% by volume or less. The internal pressure of the treatment container 1 is controlled so as to be subatmospheric to promote evaporation of the PCB oil which is removed by condensation in the cooling container 5, and at the same time to prevent a PCB oil-containing gas from leaking to the outside of the system. The method can save time and cost compared with a vacuum heating method. Unlike a washing method, the method does not generate a washing waste solution and can save labor cost and quickly remove the PCB oil.
YAMAMOTO TSUNEHEI
SASAKI KATSUYA
HARADA HIROKI
OGAWA KENJI
KANSAI ELECTRIC POWER CO
| JP2002059145A | 2002-02-26 | |||
| JP2004088016A | 2004-03-18 | |||
| JPH09168773A | 1997-06-30 | |||
| JP2001227717A | 2001-08-24 | |||
| JPH03178675A | 1991-08-02 |
Yoshinori Iwahara
Susumu Yamamoto
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