US 11,904,270 B2
Regeneration system for carbon-rich amine solutions and method for using the same
Tongwen Xu, Anhui (CN); Chenxiao Jiang, Anhui (CN); Xia Chen, Anhui (CN); Rongqiang Fu, Anhui (CN); and Zhaoming Liu, Anhui (CN)
Assigned to UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA, Anhui (CN)
Filed by UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA, Anhui (CN)
Filed on Jan. 29, 2019, as Appl. No. 16/260,516.
Claims priority of application No. 201810875910.2 (CN), filed on Aug. 2, 2018.
Prior Publication US 2020/0038803 A1, Feb. 6, 2020
Int. Cl. B01D 53/14 (2006.01); B01D 61/44 (2006.01)
CPC B01D 53/1406 (2013.01) [B01D 53/1425 (2013.01); B01D 53/1475 (2013.01); B01D 61/445 (2013.01); B01D 2251/606 (2013.01); B01D 2252/10 (2013.01); B01D 2252/204 (2013.01); B01D 2252/20447 (2013.01); B01D 2257/302 (2013.01); B01D 2258/0283 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A regeneration system for a carbon-rich amine solution produced in carbon dioxide capture from a mixed gas, which comprises a bipolar membrane electrodialysis apparatus and a carbon dioxide removal apparatus, wherein
the bipolar membrane electrodialysis apparatus comprises a bipolar membrane electrodialysis membrane stack fixed between an anode plate and a cathode plate, and the anode plate and the cathode plate are respectively connected to a positive electrode and a negative electrode of a stabilized voltage or current power supply;
the bipolar membrane electrodialysis membrane stack is formed by sequentially stacking a first bipolar membrane, one cation exchange membrane, one anion exchange membrane, and a second bipolar membrane, and the anion exchange layer of the first bipolar membrane faces the anode plate to form an anode chamber between the anion exchange layer of the first bipolar membrane and the anode plate, the cation exchange layer of the second bipolar membrane faces the cathode plate to form a cathode chamber between the cation exchange layer of the second bipolar membrane and the cathode plate, one base chamber is formed between the first bipolar membrane and the cation exchange membrane, one acid chamber is formed between the second bipolar membrane and the anion exchange membrane, wherein the anode chamber and the cathode chamber are fluidly connected with an electrode solution storage tank, the base chamber is fluidly connected with a base solution storage tank, the acid chamber is fluidly connected with an acid solution storage tank and the carbon dioxide removal apparatus, and the solution in each of the anode chamber, the cathode chamber, and the base chamber is driven by a drive pump so that a circular flow is formed between the bipolar membrane electrodialysis apparatus and each respective storage tank;
the carbon dioxide removal apparatus comprises one or more hollow fiber membrane contactors connected in series or in parallel, and the carbon dioxide removal apparatus comprises an inlet and an outlet, the inlet of the carbon dioxide removal apparatus is fluidly connected with an outlet of the acid chamber of the bipolar membrane electrodialysis apparatus, the outlet of the carbon dioxide removal apparatus is fluidly connected with the acid solution storage tank, the solution in the acid chamber is circularly flowed among the bipolar membrane electrodialysis membrane stack by a drive pump, the carbon dioxide removal apparatus and the acid solution storage tank, and carbon dioxide gas removed by the carbon dioxide removal apparatus is collected in a carbon dioxide storage tank,
wherein a feed chamber is formed between the cation exchange membrane and the anion exchange membrane, the feed chamber is fluidly connected with a feed liquid storage tank, and a carbon-rich amine solution in the feed chamber is circularly flowed between the bipolar membrane electrodialysis apparatus and the feed liquid storage tank by a drive pump.