| 摘要 |
A method for reclaiming CO2 absorbing chemical(s) from a lean aqueous CO2 absorbent leaving a regeneration column (8), where lean absorbent (30) is withdrawn and flashed (31) to generate a vapor that is compressed (34) and returned into the regeneration column as stripper gas (37), where a part of the lean absorbent (20) is withdrawn and introduced into a reclaimer (21) in which the lean absorbent is boiled to generate a gas phase (23) that is withdrawn and returned into the regeneration column as reclaimed absorbent, and a liquid phase containing impurities (24), wherein the gaseous phase that is withdrawn from the reclaimer is compressed (34) together with the vapor part (33) from the flashing of the lean absorbent, to generate a pressure in the reclaimer that is lower than the pressure in the regeneration column, and a reboiler (11) for carrying out the method, are described. |
| 主权项 |
1. A method for reclaiming one or more CO2 absorbing chemical(s) from a lean aqueous CO2 absorbent leaving a regeneration column in which CO2 has been released, or desorbed, from the lean aqueous CO2 absorbent, and the released CO2 is withdrawn from a top of a regeneration column for further treatment, and the lean aqueous CO2 absorbent, or CO2 depleted absorbent, is collected at a bottom of the regeneration column and withdrawn therefrom, where at least a part of the lean aqueous CO2 absorbent leaving the regeneration column is introduced into a reboiler where the lean aqueous CO2 absorbent is heated to generate steam and vaporized absorbent that is introduced into the regeneration column as stripping gas, where the lean aqueous CO2 absorbent is withdrawn and is returned to an absorption column, and where a part of the lean aqueous CO2 absorbent is withdrawn and introduced into a reclaimer in which the lean aqueous CO2 absorbent is boiled to generate a gas phase that is withdrawn and returned into the regeneration column as reclaimed absorbent, and a liquid phase containing impurities, heat stable salts, and degradation products from absorbing chemical(s) and other chemicals that are withdrawn from the reclaimer for deposition, wherein the lean aqueous CO2 absorbent withdrawn from the regeneration column is flashed to generate a vapour that is compressed and returned into the regeneration column as stripper gas, and a liquid phase that is returned to the absorption column, where the gaseous phase that is withdrawn from the reclaimer is compressed together with a vapour part from flashing of the lean absorbent, to generate a pressure in the reclaimer that is lower than a pressure in the regeneration column. |
