METHOD FOR DETOXICATING ALL OF PCB-CONTAINING INSULATING OIL IN TRANSFORMER, ETC.

摘要

PROBLEM TO BE SOLVED: To correct the unreality of the conventional measure to carry out the whole cleaning step starting from breaking/crushing of a transformer, etc., inside a supercritical fluid circulating route for preventing PCB from scattering and PCB gas from escaping. SOLUTION: The transformer, etc., from which PCB-containing insulating oil is withdrawn is crushed, cleaned and sorted into metal, an insulator 18, paper, a fiber 19, oil content and water in the water of a water tank 13 installed in an airtight chamber shut off completely from the air outside. The PCB contained in the sorted paper and fiber 19 is extracted by an extraction system 27 to use a solvent CO2 in the supercritical fluid circulating pipeline. The withdrawn PCB-containing insulating oil collected in the above step is decomposed into water, carbon oxide and hydrochloric acid by a supercritical hydroxylation reaction system 53 to add an oxidizing agent in the supercritical fluid circulating route.