| 摘要 |
PROBLEM TO BE SOLVED: To provide a carbon dioxide chemical absorption system which effectively uses a vapor supplied from a reboiler while maintaining a gas cooling capacity and an amine mist removal capacity of a reflux water and reduces the energy consumption amount as a whole COchemical absorption system.SOLUTION: A COchemical absorption system comprising a COabsorption tower which absorbs and separates COin a combustion exhaust gas by a COabsorbing liquid containing an alkanolamine aqueous liquid as a main component, and a regeneration tower with a boiler, includes a piping system spraying a part of or the entire reflux water which is obtained by condensing steam accompanied by a COgas discharged from the top of a regeneration tower, lowering the gas temperature by directly contacting it with the COgas containing steam and also removing amine mist, recovering it from an upper part of a packing material for COdesorption by a liquid recovering plate, and then making the recovered liquid flow together in an absorbing liquid pipe from a reboiler outlet of the regeneration tower to an absorption tower inlet. |
