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Abstract

A carbon dioxide (CO₂) chemical absorption system comprising: a CO₂ absorption column for separating CO₂ from combustion exhaust gas by absorbing the CO₂ in the combustion exhaust gas with a CO₂ absorbing liquid mainly composed of an aqueous alkanolamine solution; a regeneration column for regenerating the CO₂ absorbing liquid by desorbing CO₂ gas from the CO₂ absorbing liquid that has absorbed CO₂; a condenser for condensing water vapor entrained in the desorbed CO₂ gas discharged from the top of the regeneration column, thereby obtaining reflux water; a pipe for returning all or part of the reflux water obtained by the condenser to the top of the regeneration column, and dispersing the reflux water in the regeneration column; a collection plate for collecting the reflux water dispersed in an upper portion of a packed bed in the regeneration column; a pipe for sending the regenerated CO₂ absorbing liquid from the bottom of the regeneration column to the top of the absorption column; and a pipe for joining the reflux water collected by the collection plate into the pipe for sending the regenerated CO₂ absorbing liquid.

First Claim