| 摘要 |
The present invention is provided with: a regenerative rotary heater (2) provided with a combustion exhaust gas flow path (21) through which combustion exhaust gas (3) discharged from an oxygen combustion boiler (1) flows, a primary combustion assisting fluid flow path (22) which is adjacent to the combustion exhaust gas flow path (21) and through which a primary combustion assisting fluid (14) having a higher pressure than the combustion exhaust gas (3) flows, a secondary combustion assisting fluid flow path (23) which is adjacent to the combustion exhaust gas flow path (21) and through which a secondary combustion assisting fluid (12) having a higher pressure than the combustion exhaust gas (3) flows, and an oxygen flow path (27) which is put between the primary combustion assisting fluid flow path (22) and the secondary combustion assisting fluid flow path (23) and through which oxygen (17) flows; and an oxygen mixing part (19) which mixes the secondary combustion assisting fluid (12) preheated through the secondary combustion assisting fluid flow path (23) and the oxygen (17) preheated through the oxygen flow path (27) and supplies the mixed secondary combustion assisting fluid and oxygen to the oxygen combustion boiler (1). |
