Abstract: In a collecting method and a collecting apparatus for collecting foaming gas generated from foaming heat insulator material, as well as in a processing process and apparatus of disposals, disposals 1 including the foaming heat insulator material 5 are charged into a first and a second crushing machines 3 and 17 for separating the foaming gas contained in the foaming heat insulator material 5 thereof, and the separated foaming gas is collected by a collector 29, wherein measurement is made on the concentration of flammable gas separated, so as to control the charging of the disposals 1 and the foaming heat insulator material 5 into the first and second crushing machines 3 and 17, depending upon that concentration measured, thereby collecting the foaming gas with high efficiency, while controlling the concentration of the flammable gas, appropriately and with ease, and an charge amount thereof to be charged, appropriately, depending upon the concentration of that flammable gas contained therein.

Abstract: In a collecting method and a collecting apparatus for collecting foaming gas generated from foaming heat insulator material, as well as in a processing process and apparatus of disposals, disposals 1 including the foaming heat insulator material 5 are charged into a first and a second crushing machines 3 and 17 for separating the foaming gas contained in the foaming heat insulator material 5 thereof, and the separated foaming gas is collected by a collector 29, wherein measurement is made on the concentration of flammable gas separated, so as to control the charging of the disposals 1 and the foaming heat insulator material 5 into the first and second crushing machines 3 and 17, depending upon that concentration measured, thereby collecting the foaming gas with high efficiency, while controlling the concentration of the flammable gas, appropriately and with ease, and an charge amount thereof to be charged, appropriately, depending upon the concentration of that flammable gas contained therein.

Abstract: The present invention consists in that a nitrogen gas line and a liquid nitrogen line are subjected to hot-blast baking with clean nitrogen gas and a gas containing oxygen, whereby outgasses such as moisture to develop from heat exchangers, valves and piping can be excluded. Moreover, in order to obtain nitrogen gas of very high purity, liquid nitrogen of low contents of high-boiling components as subjected to rectifying separation is derived and gasified, and the liquid nitrogen is introduced into co-adsorbers so as to absorb and remove carbon monoxide difficult of separation by the rectifying separation, whereupon the liquid nitrogen and the nitrogen gas are obtained as products.