Process and apparatus for removing carbon dioxide and stripping another component from a liquid stream

摘要

The continuous treatment of a liquid stream for removing a selected component therefrom, includes depressurizing the liquid stream to remove carbon dioxide, forming a carbon dioxide stream and a component- laden stream (17); raising the pH of the component-laden stream (17) to form a pH adjusted stream (19); gas-stripping the component-laden, pH adjusted stream (19) with a counterflow stripping gas (73) in a stripping column (20) having a plurality of deflection cones (111) over which the pH adjusted stream (19) is sprayed, to remove the component therefrom and thereby forming a relatively component-free liquid stream (50) and a gaseous component stream (21); cooling the carbon dioxide stream; neutralizing the liquid component stream (21) with the cooled carbon dioxide stream (64); cooling the gaseous component stream (21); re- heating the gaseous component stream to form a heated stream (35) and dissolving the heated gaseous component stream (35) in an acidic solution in a re-absorption column (36) forming a reduced gas stream (40) and a liquid salt complex stream (37) of the component; and utilizing the reduced component gas stream (40) to remove the component in the gas- stripping step.