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    • 15. 发明公开
    • CO2 RECOVERY DEVICE AND CO2 RECOVERY METHOD
    • CO2回收装置和CO2回收工艺
    • EP2886183A4
    • 2015-08-26
    • EP13831157
    • 2013-04-17
    • MITSUBISHI HEAVY IND LTD
    • TANAKA HIROSHINAGAYASU HIROMITSUHIRATA TAKUYAOISHI TSUYOSHIKAMIJO TAKASHI
    • B01D53/62B01D53/14C01B32/50
    • B01D53/62B01D53/1475B01D53/18B01D53/75B01D53/77B01D53/78B01D53/96B01D2251/304B01D2251/60B01D2252/103B01D2252/20478B01D2257/504B01D2257/704C01B32/50Y02C10/04Y02C10/06Y02P20/152
    • A CO 2 recovery device is provided with a CO 2 absorption tower (13) and an absorption-solution regeneration tower (14). The CO 2 absorption tower (13) has the following: a CO 2 absorption section (13A) in which CO 2 -containing flue gas (11A) is brought into contact with a CO 2 absorption solution (12), namely a basic-amine-compound absorption solution, so as to remove CO 2 from the CO 2 -containing flue gas (11A); and a water-washing section (21) in which decarbonated flue gas (11B) from which CO 2 has been removed is brought into contact with washing water (20) so as to remove accompanying substances accompanying the decarbonated flue gas (11B). The absorption-solution regeneration tower (14) regenerates the CO 2 absorption solution that has absorbed CO 2 . This CO 2 recovery device, in which a lean solution (12B) from which CO 2 has been removed is reused in the CO 2 absorption tower (13), has an aldehyde-removing agent supply unit (23) that supplies a sulfite-compound aldehyde removing agent (22) to a circulating washing-water line (L 1 ) that circulates the washing water (20) to the water-washing section (21).
    • CO 2回收装置具有CO 2吸收塔(13)和吸收溶液再生塔(14)。 CO 2吸收塔(13)具有如下的CO 2吸收部(13A),其中含有CO 2的烟道气(11A)与CO 2吸收溶液(12)接触,即碱性胺 化合物吸收溶液,以从含CO 2的烟道气(11A)中除去CO 2; 和除去了二氧化碳的脱碳废气(11B)与清洗水(20)接触的水洗部(21),除去伴随着脱碳烟道气(11B)的伴随物质。 吸收溶液再生塔(14)再生吸收了CO 2的CO 2吸收溶液。 将CO 2被除去的贫溶液(12B)再次用于CO 2吸收塔(13)中的CO 2回收装置具有提供亚硫酸盐化合物的醛除去剂供给单元(23) 醛清除剂(22)转移到使洗涤水(20)循环到水洗部分(21)的循环洗涤水线(L 1)。