Carbon dioxide separation device

A carbon dioxide separation device comprising:

• a raw material gas introduction line configured to introduce a raw material gas containing carbon dioxide;
• a first membrane separator connected to an end portion of the raw material gas introduction line and configured to introduce the raw material gas;
• a first permeate gas discharge line configured to discharge a first permeate gas permeated by membrane separation with the first membrane separator;
• a first non-permeate gas discharge line configured to discharge a first non-permeate gas not permeated by membrane separation with the first membrane separator;
• a combustor provided downstream of the first membrane separator and configured to combust the first permeate gas;
• a combustion gas discharge line connected to the combustor and configured to discharge a combustion gas obtained by combusting the first permeate gas with the combustor;
• a second membrane separator provided downstream of the combustor and connected to the combustion gas discharge line;
• a compressor provided in a middle of the combustion gas discharge line and configured to supply the combustion gas to the second membrane separator;
• a second permeate gas discharge line configured to discharge a second permeate gas permeated by membrane separation with the second membrane separator;
• and
• a second non-permeate gas discharge line configured to discharge a second non-permeate gas not permeated by membrane separation with the second membrane separator and supply the second non-permeate gas to the first membrane separator.