Extractor

Disposal of abandoned refrigerators is an important aspect in the field of disposal of durable goods. Disposal of refrigerators consists of their disassembly (mainly the blower / motor from the shell) and then the crushing of the casing. The casing is made with polyurethane foam, sheet metal and plastics, while shredding everything is chopped and you have the release of gases that were used to expand the polyuretan. The current construction methods use cyclopentane as expanding gas, but in the past CFC's (chlorofluorocarbons) have been widely used. Up till this day 70% of refrigerators to be disposed contains polyurethane foams expanded with CFC's. The CFC's released during the shredding, being an ozone depleting compound, must be captured and purified, according to specific laws. Amboso has developed a system which purify these emissions. The depuration system consists of four stages of reduction in series, constituted respectively by: • bag filter as the first stage of reduction of dry powders of polyurethane derived from the shredding process; • regenerative combustion plant with three towers is the second stage to remove the volatile organic compounds; • gas/solid reactor and bag filter as third depuration stage, in this stage hydrochloric acid and hydrofluoric acid ( generated by CFC's combustion ) are removed with sodium bicarbonate; • the final depuration stage is a active carbon filter.