To provide a detoxifying treatment method for an apparatus incorporating an organic halogen compound, which performs the detoxifying treatment in the organic halogen compound left in the apparatus without neither generating dioxin, etc., as a by-product nor disassembling the apparatus, etc., and also precisely predicts the residual concentration of the organic halogen compound.
A liquid mixture composed of a hydrogen donor and an alkali compound is filled into an apparatus incorporating the organic halogen compound-containing insulating oil, from which the halogen compound is eluted and dissolved by intermittently radiating micro waves and circulating a treatment liquid in the apparatus, while circulating the treatment liquid, that is obtained by eluting the organic halogen compound left in the apparatus into the liquid mixture. The elution speed of the organic halogen compound is calculated by measuring the concentration of the organic halogen compound immediately after stopping the radiation of the micro waves and immediately before re-starting the irradiation. Then, cleaning is performed, while confirming that the elution speed is kept to be equal to or less than a prescribed reference value and also is being reduced. The treatment liquid is discharged after a cleaning process is terminated.
FURUHASHI TETSUTARO
UMEDA YOKO
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