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Patent Searching and Data


Title:
RECOVERY OF FOAMING GAS OF FOAMED HEAT INSULATING MATERIAL
Document Type and Number:
Japanese Patent JPH05147038
Kind Code:
A
Abstract:

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.


Inventors:
TAKAMURA YOSHIYUKI
HAYASHI MASAKATSU
ODA CHIKAO
HASEGAWA TSUTOMU
MITSUSAKA TOSHIAKI
NARUTOMI SHUSUKE
Application Number:
JP31600591A
Publication Date:
June 15, 1993
Filing Date:
November 29, 1991
Export Citation:
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Assignee:
HITACHI LTD
International Classes:
B02C23/00; B29B17/00; B29B17/04; F25J1/00; B29K75/00; B29K105/04; (IPC1-7): B02C23/00; B29B17/00; B29K75/00; B29K105/04; F25J1/00
Attorney, Agent or Firm:
Yukihiko Takada