Carbon Dioxide Separation/Recovery Device, Combustion System Using Same, Thermal Power Generation System Using Same, and Method for Separating and Recovering Carbon Dioxide

摘要

A carbon dioxide separation/recovery device for separating and recovering carbon dioxide from a gas to be processed and containing nitrogen oxides and carbon dioxide by using a carbon dioxide scavenger, including a carbon dioxide trapping unit having the carbon dioxide scavenger, in which the carbon dioxide trapping unit includes: a gas flow inlet which introduces the gas to be processed; a heating unit of heating a scavenger heating gas used upon desorption of carbon dioxide trapped by the carbon dioxide scavenger to a predetermined temperature; a cooling gas introduction port which introduces a scavenger cooling gas used when cooling the carbon dioxide scavenger; and a moisture mixing part which adds moisture to a gas for nitrogen oxide desorption used in desorption of nitrogen oxides from the carbon dioxide scavenger. Consequently, NOx accumulated to the carbon dioxide scavenger is desorbed, thereby capable of suppressing lowering in the performance of the carbon dioxide scavenger and reducing the running cost.