Combustion system and combustion method

摘要

The combustion system (20) comprises a boiler (21) and a flue gas treatment system (22) downstream of the boiler (21). The flue gas treatment system (22) comprises a desulphurization unit (26), a carbonator and a calciner defining a carbonator/calciner loop (31), the flue gas from the desulphurization unit (26) being fed into the carbonator. No air pre-heaters, for pre-heating combustion oxidizer to be supplied into the boiler (21) using heat of flue gas, are provided at the boiler (21) and between the boiler (21) and the carbonator.