PURPOSE: To recover fluorocarbon gas in a liquid form, in the disposal treatment of a foamed heat insulating material (e.g. hard urethane foam), by separating fluorocarbon gas confined in open cells from the heat insulating material to recover the same as fluorocarbon liquid.
CONSTITUTION: Hard urethane foam waste is finely ground up to the same particle size as open cells by a grinder 1 and the ground waste is separated into a fine powder resin 12 and foaming gas 13 by a separator 2. The foaming gas 13 is cooled to the vapor pressure temp. of fluorocarbon or lower in a cooling condenser 4a and the recovered fluorocarbon liquid 14a is stored in a tank 5, whereas non-condensed gas 15a is returned to the grinder 1 and a part of the gas 15a is introduced into an adsorbing device 6 to further adsorb a very small amount of fluorocarbon and discharged as clean gas 16.
HAYASHI MASAKATSU
ODA CHIKAO
HASEGAWA TSUTOMU
MITSUSAKA TOSHIAKI
NARUTOMI SHUSUKE