| 摘要 |
A combustion exhaust gas treatment system comprising: a heat exchanger (A) for recovering heat contained in the combustion exhaust gas into heat medium, an absorption column for obtaining CO2 removed gas by absorbing CO2 in the combustion exhaust gas into absorbent, a heat exchanger (B) for applying heat recovered by heat medium to the CO2 absorbed absorbent, a desorption column for desorbing the absorbent by removing CO2 from the CO2 absorbed absorbent, a flash tank for flash vaporizing the desorbed absorbent and a heat exchanger (E) for transferring heat from the desorbed absorbent to the CO2 absorbed absorbent, wherein the CO2 absorbed absorbent can be supplied from the absorption column to the desorption column via the heat exchanger (E) and the heat exchanger (B) in this order, and the desorbed absorbent can be supplied from the desorption column to the absorption column via the flash tank and the heat exchanger (E) in this order. |
| 主权项 |
1. A combustion exhaust gas treatment system comprising:
a combustion apparatus for generating an exhaust gas, an air heater, a heat exchanger (A) for recovering heat contained in the exhaust gas into a heat medium, an electrostatic precipitator, a wet desulfurization device, a pre-scrubber, an absorption column for contacting the exhaust gas with an absorbent to absorb CO2 in the exhaust gas into the absorbent to obtain a CO2 absorbed absorbent and a CO2 removed gas, in which the exhaust gas is discharged from the combustion apparatus through, in sequence, the air heater, the heat exchanger (A), the electrostatic precipitator, the wet desulfurization device and the pre-scrubber, and is introduced to the absorption column, a desorption column for releasing CO2 from the CO2 absorbed absorbent to obtain a regenerated absorbent, a reboiler for vaporizing the regenerated absorbent to supply heat to the desorption column, a flash tank for flash vaporizing the regenerated absorbent, a heat exchanger (E) for transferring heat from the regenerated absorbent to the CO2 absorbed absorbent; and a heat exchanger (B) provided between the heat exchanger (E) and the desorption column to apply heat recovered by the heat medium to the CO2 absorbed absorbent; the CO2 absorbed absorbent being able to be supplied from the absorption column to the desorption column via the heat exchanger (E), and the regenerated absorbent being able to be supplied from the desorption column to the absorption column via the flash tank and the heat exchanger (E). |
