APPARATUS FOR LIQUEFACTION AND UNDERGROUND INJECTION OF CARBON DIOXIDE

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The present invention relates to an apparatus for a liquefaction and underground injection of carbon dioxide. The apparatus for the liquefaction and underground injection of carbon dioxide according to the present invention comprises : a supply part which supplies carbon dioxide; a compressor which compresses the carbon dioxide supplied from the supply part with high pressure and high temperature; a cooling device which cools the carbon dioxide passing through the compressor; a liquid-vapor separator which separates the carbon dioxide passing through the cooling device into vapor phase carbon dioxide and liquid phase carbon dioxide; and an injection part which includes an injection pump injecting the liquid phase carbon dioxide into the ground by compressing the liquid phase carbon dioxide passing through the liquid-vapor separator, and a heater heating the carbon dioxide passing through the injection pump in the supercritical state in order to inject the liquid phase carbon dioxide passing through the liquid-vapor separator into the ground by changing the liquid phase carbon dioxide into the supercritical state. The apparatus for the liquefaction and underground injection of carbon dioxide is characterized by re-supplying the vapor phase carbon dioxide passing through the liquid-vapor separator to the compressor and re-compressing the vapor phase carbon dioxide. Accordingly, the present invention provides the apparatus for the liquefaction and underground injection of carbon dioxide capable of reducing energy required for underground injection and energy for the liquefaction of carbon dioxide.(110) Supply partCOPYRIGHT KIPO 2014