Method of recovering carbon dioxide and recovery apparatus

A carbon dioxide recovery apparatus, comprising:

• an absorption column configured to bring a gas into contact with an absorbing liquid and to allow the absorbing liquid to absorb carbon dioxide contained in the gas, the absorption column having a first absorbing section and a second absorbing section which are arranged to supply the gas through the first absorbing section into the second absorbing section;
• a regeneration column that regenerate the absorbing liquid, configured to heat the absorbing liquid having carbon dioxide absorbed in the absorption column to cause the absorbing liquid to release the carbon dioxide, the regeneration column having a first regenerating section having an external heating implement and a second regenerating section arranged to be heated by heat from gas discharged from the first regenerating section;
• and
• a circulating mechanism comprising a circulation system configured to circulate the absorbing liquid between the second absorbing section and the first regenerating section, and a branch flow system branched from the circulation system to cause a part of the absorbing liquid circulated in the circulation system to flow from the second absorbing section through the first absorbing section and the second regenerating section successively, and be directed to the first regenerating section.