COGENERATION SYSTEM CONCEPT FOR CO2 RECOVERY PLANT

摘要

A CO2 recovery system and a CO2 recovery method include an absorption apparatus that causes CO2 in an exhaust gas to be absorbed by CO2 absorption liquid, a regeneration apparatus that heats the CO2 absorption liquid to separate CO2; a CO2 compression mechanism of a first turbine driving mechanism that is driven in conjunction with a first steam turbine to compress separated CO2, a reheating boiler that supplies LP steam exhausted from the first steam turbine in order to heat the CO2 absorption liquid, an auxiliary boiler that heats condensed water of the LP steam after the CO2 absorption liquid is heated to generate HP steam and supplies the HP steam to the first steam turbine, and a second turbine driving mechanism that supplies the HP steam generated in the auxiliary boiler to a second steam turbine and is driven in conjunction with the second steam turbine.

主权项

1. A CO2 recovery system comprising:
an absorption apparatus that brings CO2 absorption liquid into contact with an exhaust gas so that CO2 in the exhaust gas is absorbed by the CO2 absorption liquid; a regeneration apparatus that receives the CO2 absorption liquid having absorbed CO2 from the absorption apparatus and heats the CO2 absorption liquid to separate CO2 from the CO2 absorption liquid; a CO2 compression mechanism of a first turbine driving mechanism that is driven in conjunction with a first steam turbine to compress CO2 separated in the regeneration apparatus; a reheating boiler that supplies LP steam exhausted from the first steam turbine in order to heat the CO2 absorption liquid in the regeneration apparatus; an auxiliary boiler that heats condensed water of the LP steam after the CO2 absorption liquid is heated to generate HP steam and supplies the HP steam to the first steam turbine of the CO2 compression mechanism; and a second turbine driving mechanism that supplies the HP steam generated in the auxiliary boiler to a second steam turbine and is driven in conjunction with the second steam turbine.