The present invention relates to the field of carbon capture technology, and provides a
carbon dioxide adsorption
system, including: a first compressor unit, a temperature swing adsorption unit and a
vacuum pressure swing adsorption unit connected in sequence to the rear end of the raw gas inlet; a
turbine expansion unit, whose inlet is connected to the first outlet of the
vacuum pressure swing adsorption unit, and the
turbine expansion unit is connected to the first compressor unit; a cold
recovery unit, whose first inlet is connected to the outlet of the
turbine expansion unit, whose second inlet is connected to the second outlet of the
vacuum pressure swing adsorption unit, and whose cold
recovery unit is provided with a decarbonated
carbon dioxide raw material outlet; a first separator, whose inlet is connected to the first outlet of the cold
recovery unit, whose first outlet is connected to the third inlet of the cold recovery unit, whose second outlet is connected to the inlet of the vacuum
pressure swing adsorption unit, and whose second outlet is connected to the
carbon dioxide liquid outlet. The present invention effectively improves the CO2 capture efficiency, reduces the equipment size, reduces the CO2 capture and
liquefaction energy consumption, simplifies the process flow, and is suitable for large-scale application.