CARBON DIOXIDE RECOVERY APPARATUS AND CARBON DIOXIDE RECOVERY METHOD

摘要

According to one embodiment, a CO2 recovery apparatus 10 includes: an absorption tower 11 in which a lean solution 22 is allowed to absorb CO2 in a discharge gas 21; a first heat exchange unit 12 in which a rich solution 23 is heated to from 50 to 100° C. to allow the rich solution 23 to have a mixed phase including two phases of a CO2-rich phase 31 and a CO2-lean phase 32; a phase separation unit 13 in which the rich solution 23 is separated into a CO2-rich phase 31 and a CO2-lean phase 32; and a regeneration tower 16 in which CO2 contained In a separated CO2-rich solution 46 including the CO2-rich phase 31 is separated to regenerate the rich solution 23.

主权项

1. A carbon dioxide recovery apparatus comprising:
an absorption tower in which gas-liquid contact of a discharge gas containing CO2 with an absorbing liquid is carried out to allow said absorbing liquid to absorb said CO2; a first heat exchange unit that heats said absorbing liquid containing CO2 to from 50 to 100° C. to allow said absorbing liquid containing CO2 to have a mixed phase comprising a CO2-rich phase and a CO2-lean phase; a phase separation unit that separates said absorbing liquid containing CO2 into said CO2-rich phase and said CO2-lean phase, discharges said CO2-rich phase as a separated CO2-rich solution, and discharges said CO2-lean phase as a separated CO2-lean solution; and a regeneration tower in which CO2 contained in said separated CO2-rich solution is separated to regenerate said absorbing liquid.