JP2018001086A - 二酸化炭素回収システムおよび排ガス処理方法 - Google Patents
二酸化炭素回収システムおよび排ガス処理方法 Download PDFInfo
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Abstract
【解決手段】一の実施形態による二酸化炭素回収システムは、二酸化炭素を含有する燃焼排ガスとアミン化合物を含有する吸収液を接触させる第1接触部を有し、前記第1接触部で前記燃焼排ガス中の少なくとも一部の前記二酸化炭素を前記吸収液に吸収させて前記燃焼排ガスを放出する吸収塔を備える。さらに、前記システムは、前記吸収塔の前記第1接触部から放出された前記燃焼排ガスと洗浄液を接触させる第2接触部を有し、前記第2接触部の上流側に前記燃焼排ガスと前記洗浄液がそれぞれ供給されるように構成された洗浄装置を備える。
【選択図】図1
Description
図1は、第1実施形態の二酸化炭素回収システムの構成を示す模式図である。
吸収塔11において、燃焼排ガス1は気液接触部11a内を上昇し、吸収液2は気液接触部11a内を下降する。このように、吸収塔11は、燃焼排ガス1と吸収液2とを気液接触部11a内での対向流により接触させる。
図2は、第1実施形態の洗浄装置21の利点を説明するための模式図である。
図3は、第2実施形態の二酸化炭素回収システムの構成を示す模式図である。
図4は、第3実施形態の二酸化炭素回収システムの構成を示す模式図である。
図5は、第4実施形態の二酸化炭素回収システムの構成を示す模式図である。
図7は、第5実施形態の二酸化炭素回収システムの構成を示す模式図である。
図8は、第6実施形態の二酸化炭素回収システムの構成を示す模式図である。
本具体例の洗浄液用計測器63とプレ洗浄液用計測器65はそれぞれ、洗浄液7とプレ洗浄液9の流量を計測する。そして、制御装置25は、洗浄液7の流量(第1流量)がプレ洗浄液9の流量(第2流量)よりも大きくなるように、洗浄液ポンプ23とプレ洗浄液ポンプ33の回転数を制御する。
本具体例の洗浄液用計測器63とプレ洗浄液用計測器65はそれぞれ、洗浄液7とプレ洗浄液9の温度を計測する。そして、制御装置25は、洗浄液7の温度(第1温度)がプレ洗浄液9の温度(第2温度)よりも低くなるように、洗浄液冷却器24とプレ洗浄液冷却器34の冷却動作を制御する。
本具体例の洗浄液用計測器63は、洗浄液7のpHを計測するpH計測器である。そして、制御装置25は、洗浄液7のpHが所定値になるように、洗浄液用調節部64の動作を制御する。具体的には、制御装置25は、洗浄液7のpHが8以下(より好ましくは7以下)になるように、洗浄液用調節部64から洗浄液7に酸を添加する。これにより、洗浄液7のガス洗浄力を高めることができる。酸の例は、硫酸、硝酸、リン酸、酢酸、ホウ酸などである。本具体例の洗浄液用調節部64は、pH調節部の例である。
図9は、第7実施形態の二酸化炭素回収システムの構成を示す模式図である。
3:CO2除去済み排ガス、4:混合ガス、5:回収CO2ガス、6:凝縮水、
7:洗浄液、8:洗浄済み排ガス、9:プレ洗浄液、10:プレ洗浄済み排ガス、
11:吸収塔、11a:気液接触部、11b:分散器、
11c:液溜め部、11d:デミスタ、12:吸収液ポンプ、
13:熱交換器、14:再生塔、14a:下部気液接触部、
14b:下部分散器、14c:液溜め部、14d:下部デミスタ、
14e:上部気液接触部、14f:上部分散器、14g:上部デミスタ、
15:リボイラ、16:吸収液冷却器、17:混合ガス冷却器、
18:気液分離器、19:凝縮水流路、20:凝縮水ポンプ、
21:洗浄装置、21a:気液接触部、21b:分散器、
21c:液溜め部、21d:デミスタ、22:洗浄液流路、
23:洗浄液ポンプ、24:洗浄液冷却器、25:制御装置、
31:プレ洗浄装置、31a:気液接触部、31b:分散器、
31c:液溜め部、31d:デミスタ、32:プレ洗浄液流路、
33:プレ洗浄液ポンプ、34:プレ洗浄液冷却器、
41:プレ洗浄装置、41a:気液接触部、41b:分散器、
41c:液溜め部、41d:デミスタ、42:プレ洗浄液流路、
43:プレ洗浄液ポンプ、44:プレ洗浄液冷却器、
51:排ガス配管、51a:第1配管部、51b:第2配管部、
61:排ガス用計測器、62:排ガス用調節部、
63:洗浄液用計測器、64:洗浄液用調節部、
65:プレ洗浄液用計測器、66:プレ洗浄液用調節部、
71:洗浄液再利用流路、72:洗浄液再利用バルブ
Claims (7)
- 二酸化炭素を含有する燃焼排ガスとアミン化合物を含有する吸収液を接触させる第1接触部を有し、前記第1接触部で前記燃焼排ガス中の少なくとも一部の前記二酸化炭素を前記吸収液に吸収させて前記燃焼排ガスを放出する吸収塔と、
前記吸収塔の前記第1接触部から放出された前記燃焼排ガスと洗浄液を接触させる第2接触部を有し、前記第2接触部の上流側に前記燃焼排ガスと前記洗浄液がそれぞれ供給されるように構成された洗浄装置と、
を備える二酸化炭素回収システム。 - 前記第2接触部の下流側にデミスタをさらに備える、請求項1に記載の二酸化炭素回収システム。
- 前記デミスタは、水平面への投影位置が前記第2接触部の水平面への投影位置と重ならない位置に設けられている、請求項2に記載の二酸化炭素回収システム。
- 前記洗浄装置で使用する前記洗浄液のpHを調節するpH調節部と、
前記pH調節部を制御することで、前記pHを所定値に制御する制御装置と、
をさらに備える請求項1から3のいずれか1項に記載の二酸化炭素回収システム。 - 前記吸収塔から前記洗浄装置に前記燃焼排ガスを搬送する配管は、第1配管径を有する第1配管部と、前記第1配管部の下流側に設けられ前記第1配管径よりも小さい第2配管径を有する第2配管部とを含む、請求項1から4のいずれか1項に記載の二酸化炭素回収システム。
- 前記第2配管部は、前記配管の屈曲部分を含む、請求項5に記載の二酸化炭素回収システム。
- 二酸化炭素を含有する燃焼排ガスとアミン化合物を含有する吸収液とを接触させて、前記燃焼排ガス中の少なくとも一部の前記二酸化炭素を前記吸収液に吸収させて前記燃焼排ガスを放出し、
放出された前記燃焼排ガスと洗浄液とを略同じ方向に並流させて接触させ前記燃焼排ガスを洗浄する、
ことを備える排ガス処理方法。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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JP2016130780A JP6740036B2 (ja) | 2016-06-30 | 2016-06-30 | 二酸化炭素回収システムおよび排ガス処理方法 |
GB1708805.5A GB2551910B (en) | 2016-06-30 | 2017-06-02 | Carbon dioxide capturing system and exhaust gas processing method |
US15/613,488 US10737213B2 (en) | 2016-06-30 | 2017-06-05 | Carbon dioxide capturing system and exhaust gas processing method |
AU2017203838A AU2017203838B2 (en) | 2016-06-30 | 2017-06-07 | Carbon dioxide capturing system and exhaust gas processing method |
CN201710521388.3A CN107551762A (zh) | 2016-06-30 | 2017-06-30 | 二氧化碳回收系统及废气处理方法 |
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JP2020082018A (ja) * | 2018-11-29 | 2020-06-04 | 株式会社東芝 | 二酸化炭素回収システムおよびその運転方法 |
JP2021017814A (ja) * | 2019-07-17 | 2021-02-15 | ホクシン産業株式会社 | 排気ガス浄化システム |
US11559764B2 (en) | 2019-09-12 | 2023-01-24 | Kabushiki Kaisha Toshiba | Carbon dioxide capturing system and method of operating the same |
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JP2021020193A (ja) * | 2019-07-30 | 2021-02-18 | 株式会社東芝 | 二酸化炭素回収システムおよび二酸化炭素回収システムの運転方法 |
JP2022109656A (ja) * | 2021-01-15 | 2022-07-28 | 株式会社東芝 | 二酸化炭素回収システムおよび二酸化炭素回収システムの運転方法 |
CN113521966A (zh) * | 2021-07-26 | 2021-10-22 | 浙江大学 | 基于传质-反应调控的分区多级循环co2捕集浓缩方法 |
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