To provide a method of removing PCB in trace PCB contaminated electric equipment capable of performing removal treatment safely and economically while grasping an inner state of the equipment when extracting and removing PCB in the electric equipment into a solvent.
In the method of removing PCB in trace PCB contaminated electric equipment, insulating oil is pulled out from the electric equipment into which the insulating oil containing PCB is filled, thereafter, a hydrocarbon solvent is injected, the PCB remaining in the electric equipment is dissolved into the hydrocarbon solvent and the hydrocarbon solvent in which the PCB is dissolved is discharged, wherein circumstances of removal treatment in the electric equipment is calculated by the calculating formula (initial oil PCB concentration × weight × residual oil rate (oil attachment rate) × cleaning efficiency) and the removal treatment is advanced while confirming the calculation result.
COPYRIGHT: (C)2009,JPO&INPIT
Nishizawa Katsushi
Masahide Sugaya
Tadashi Shimodaira
Yonezawa Hiroshi
Daisuke Takayama
Kanden Engineering Co., Ltd.
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Masami Tamama
Hidetoshi Tachibana
Yasukazu Sato
Hiroshi Yoshimoto
Yasushi Kawasaki