Steam turbine power plant and operation method thereof

摘要

According to one aspect of the embodiment, a steam turbine power plant 10 is provided with a steam turbine system 20 which 5 generates electricity by driving a steam turbine by the steam from a boiler 21 or the like which generates the steam by combustion heat, and a carbon dioxide recovery system SO which recovers carbon dioxide contained in the combustion gas from the boiler 21 or the like. In the steam turbine system 20, part of 10 the steam having performed the expansion work in a high-pressure turbine 22 is introduced into a back-pressure turbine 27. The steam introduced into the back-pressure turbine 27 performs the expansion work and partly supplied to the carbon dioxide recovery system 50 through a pipe 42 to heat an absorption 15 liquid 90 in a regeneration tower 70. 2287634_1 (GHMattera) 25/05/10 5 0 11 1 1 3