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PROBLEM TO BE SOLVED: To provide a CO2 collection device and method further improving energy efficiency.
SOLUTION: The CO2 collection device has an absorption tower 13 for removing CO2 by bringing a CO2-containing gas 11 into contact with a CO2-absorbing liquid 12, and a regeneration tower 15 for regenerating a CO2-rich solution 14, wherein at the regeneration tower 15, a lean solution 16 in which CO2 is removed is reused in the absorption tower 13. Besides, the device is provided with: a regeneration heater 18 which extracts outside the lean solution 16 collected in the vicinity of the bottom of the tower 15 to perform a heat exchange by a high-temperature steam 17; and a heat exchanger 21 using a steam-condensed water, which is provided in a rich solution-feeding pipe 20 for feeding the rich solution 14 from the absorption tower 13 to the tower 15 and heats the rich solution 14 by utilizing the remaining heat of the steam-condensed water 19 from the heater 18.
COPYRIGHT: (C)2013,JPO&INPIT
【課題】エネルギー効率を一層向上させたCO2回収装置及び方法を提供する。【解決手段】CO2を含有するCO2含有ガス11とCO2を吸収するCO2吸収液12とを接触させてCO2を除去する吸収塔13と、CO2を吸収したリッチ溶液14を再生する再生塔15と、該再生塔15でCO2を除去したリーン溶液16を吸収塔13で再利用するCO2回収装置であって、再生塔15の塔底部近傍に回収されたリーン溶液16を外部へ抜き出して高温スチーム17により熱交換する再生加熱器18と、吸収塔13から再生塔15にリッチ溶液14を供給するリッチ溶液供給管20に設けられ、前記再生加熱器18からのスチーム凝縮水19の余熱により該リッチ溶液14を加熱するスチーム凝縮水熱交換器21とを具備してなる。【選択図】 図1