Carbon dioxide capturing apparatus and capturing method

An apparatus for capturing of carbon dioxide, comprising:

• an absorption column that includes a carbon dioxide adsorber or a carbon dioxide absorber that adsorbs or absorbs carbon dioxide from exhaust gas;
• a regeneration column that is connected with the absorption column and includes an adsorbent heater that heats an adsorbent circulating therein or an absorbent heater that heats an absorbent circulating therein;
• and
• an adsorbent or an absorbent that alternately performs adsorption of carbon dioxide and desorption of carbon dioxide or absorption of carbon dioxide and desorption of carbon dioxide while circulating through the absorption column and the regeneration column,
• wherein the apparatus is configured to diverge from a first equalizing gas line, which connects a line for carbon dioxide desorbed through the regeneration column and an absorption column hopper, and supply low-concentration oxygen gas to the absorption column hopper.

A process for capturing of carbon dioxide that comprising:

• adsorbing carbon dioxide or absorbing carbon dioxide from exhaust gas at an absorption column;
• and alternately performing adsorption of carbon dioxide and desorption of carbon dioxide or absorption of carbon dioxide and desorption of carbon dioxide while an adsorbent or an absorbent circulates in a regeneration column and the absorption column that include a heater for heating the adsorbent or the absorbent circulating therein,
• wherein gas diverges from a first equalizing gas line, which connects a line for carbon dioxide desorbed through the regeneration column and an absorption column hopper, to supply low-concentration oxygen gas to the absorption column hopper, and
• gas diverges from a second equalizing gas line, which connects a line for discharging exhaust gas with carbon dioxide removed that is discharged outside through an upper end of the absorption column and a regeneration column hopper, to supply low-concentration oxygen gas to the regeneration column hopper.