PURPOSE: To store liquid CO2 underwater without diffusion or dissolution in the sea water, by charging and sealing the liquid CO2 in a liquid-tight bag so as to obtain packed liquid CO2, and by submerging the packed liquid CO2 onto the deep-sea bottom through a vertically long pipe under the pressure of discharged air.
CONSTITUTION: Liquid CO2 in a tank 2 on a charging station 1 is pressurized by a pressurizing pump 4 up to about 40 atm. and is then fed to a heat- exchanger 5 where the temperature thereof is raised up to 0 deg.C. Then, the CO2 is introduced into a lock hopper so as to be packed into an unpermeable bag. The packed liquid CO2 is shifted into a charge pipe 9 which has been previously pressurized up to 40 atm, and is suspended from weights 13a, 13b provided at both ends of a long wire 12 by means of hooks (h). Then, the packed liquid CO2 together with the weight 13a, is lowered by about 400m so as to reach the surface of the sea water in the charge pipe 9. Further, after it reaches at a depth 15 of 300m from the sea level, where the relationship between the specific weight of the sea water and that of the liquid CO2 are reversed, the packed liquid CO2 3e is submerged onto the sea bottom for storage.
FUJIOKA YUICHI
MURAKAMI NOBUAKI
OZAKI MASAHIKO
