Process and device for removing polychlorinated biphenyls (PCBs) from dielectric refrigerant fluids (FDRs) contained in electrical equipment

摘要

The process comprises the stages of extracting the FDRs from the electrical equipment, passing them through a PCB adsorbent at a flow rate that determines the residence time, returning them to the electrical equipment and remediating the PCB-containing adsorbent. And the device comprises, in an FDR inlet (1) and outlet (2) conduit, a dirt and particle retaining filter (3) which precedes a pump for metering (4) and propelling said FDR through columns (5-8) with three-way valves (9,10) and an automatic flowmeter (11) for regulating the velocity of passage, which determines the residence time in said columns. IMAGE