| 摘要 |
PROBLEM TO BE SOLVED: To provide a method which can eliminate the need for a worker to work under a PCB atmosphere, can dismantle the transformer safely, separate the dismantled transformer pieces, and recycle the members as a resource. SOLUTION: The method for rendering a transformer harmless comprises (a) a step 22 for removing a PCB-contaminated insulating oil from a transformer containing a PCB-contaminated insulating oil, (b) a step 23 for removing the residual PCB-contaminated insulating oil by cleaning with a cleaning solvent, (c) a step 24 for roughly dismantling the transformer to such a size that can be placed in a cleaning device, (d) a step 25 for conducting primary cleaning on a dismantlement unit basis, (e) a step 26 for separating and dismantling the dismantlement unit into cases, metals, alumina, insulators, electric wires, cores, wood, gaskets, and other members, (f) a step 28 for separating and dismantling the core into an iron core and a coil, and (g) a step 38 for crushing the coil together with the electric wire and separating copper from paper, (h) steps 29, 41, 42 and 44 for subjecting each of the separated members to secondary cleaning, and (i) steps 30 and 31 for determining the degree of cleanness. COPYRIGHT: (C)2007,JPO&INPIT
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