SYSTEM AND AUTOMATIC METHOD FOR EXTRACTION OF GASEOUS ATMOSPHERIC CONTAMINANTS WITH TOXIC PROPERTIES, WHICH ARE RETAINED IN POLYURETHANE FOAM (PUF) FILTERS

摘要

The present invention provides an automatic system for extraction of gaseous atmospheric contaminants (HAPs and PCBs) with toxic properties, which are retained in polyurethane foam (PUF) filters. The system comprises: an automatic extraction device, which makes it possible to extract the target chemical compounds, using a sequence of organic solvents in which the PUF has to be immersed, by means of an extraction process based on cycles of compression and decompression of the PUF; and a drying device that makes it possible to dry the clean PUFs from the previous process by means of entrainment of the solvent with ultrapure, gaseous, hot N 2 , thereby removing the solvent until the PUF is dry.