Oxyfuel combustion boiler plant and control method for the same

摘要

An oxyfuel combustion boiler plant comprising burners 210, 220, 225 arranged in a plurality of stages in a height direction of a furnace for injecting fuel and gas including oxygen supply system 401 for supplying oxygen to the burners, a flue gas circulation system 402 for returning a part of boiler flue gas discharged from the boiler to the burners as circulation flus gas, and a carbon dioxide collection device 350 for collecting carbon dioxide from a reminder of the boiler flue gas, characterized in that
the oxyfuel combustion boiler plant further comprising: an oxygen flow rate decision device 136 or a circulation flue gas flow rate decision device 138 capable of adjusting at least one of a flow rate of the oxygen and a flow rate of the circulation flue gas supplied to the burners for each of the