CO2 recovery apparatus and CO2 recovery method

US8597412B2 · kind B2 · utility

Assignees

• Mitsubishi Electric Corporation · JP
• The Kansai Electric Power Co., Inc. · JP

Inventors

• Hiroshi Tanaka · Kani, JP
• Toru Takashina · Hiroshima, JP
• Tsuyoshi Oishi · Tokyo, JP
• Masaki Iijima · Tokyo, JP
• Tomio Mimura · Osaka, JP
• Kouki Ogura · Osaka, JP
• Yasuyuki Yagi · Kasai, JP

Key dates

• Filing date: Feb 20, 2009
• Grant date: Dec 3, 2013
• Expiry date: Sep 15, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E20/32
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A CO2 recovery apparatus according to the present invention includes: an absorber (1003) that brings CO2-containing flue gas (1001A) into counter-current contact with CO2 absorbent (1002) to reduce CO2, and a regenerator (1005) that regenerates rich solution (1004) that has absorbed CO2, in which lean solution (1006) having CO2 reduced in the regenerator (1005) is reused in the absorber (1003). The absorber (1003) further includes a CO2 absorbing unit (1010) that recovers CO2 contained in the flue gas (1001A), and the CO2 absorbent (1002) that has absorbed CO2 is extracted from a rich side of the CO2 absorbing unit (1010) to exterior, cooled, and then supplied to a position nearer to a lean side of the absorber (1003) with respect to the position at which the CO2 absorbent (1002) is extracted.