UNDERGROUND STORAGE SYSTEM FOR CARBON DIOXIDE

PROBLEM TO BE SOLVED: To efficiently dissolve carbon dioxide in a solvent and to suppress an increase in the transport cost of carbon dioxide. SOLUTION: This underground storage system for carbon dioxide is constituted by providing a carbon dioxide compressor 2 for compressing carbon dioxide up to a liquid or supercritical state and a pressure sending pump 3 for compressing the solvent to feed the same and installing not only a carbon dioxide dissolving device 40, which is composed of a fine bubble forming device 7 for mixing carbon dioxide with the solvent while converting carbon dioxide to fine bubbles by the shearing force of the solvent flowing through a main flow pipeline and the dissolving tank 4 installed on the rear stage of the fine bubble forming device 7 and dissolving carbon dioxide in the solvent to produce carbon dioxide dissolved water, but also the injection well 5 piercing through the ground up to an aquifer to introduce the formed carbon dioxide dissolved water into the aquifer in the ground under pressure. The carbon dioxide compressor 2 and the solvent pressure sending pump 3 are arranged on the ground separated from the aquifer while the carbon dioxide dissolving device 40 is arranged in the vicinity of the injection well 5, and the carbon dioxide compressor 2, the solvent pressure sending pump 3 and the carbon dioxide dissolving device 40 are each connected by pipelines 41 and 42. COPYRIGHT: (C)2010,JPO&INPIT