US 12,264,126 B1
Device and method for refining ethanol
Xinyi Tan, Beijing (CN); Qunsheng Li, Beijing (CN); Tianwei Tan, Beijing (CN); and Hongkang Zhao, Beijing (CN)
Assigned to Beijing Institute of Technology, Beijing (CN); and Beijing University of Chemical Technology, Beijing (CN)
Filed by Beijing Institute of Technology, Beijing (CN); and Beijing University of Chemical Technology, Beijing (CN)
Filed on Nov. 28, 2024, as Appl. No. 18/963,493.
Claims priority of application No. 202410585790.8 (CN), filed on May 13, 2024.
Int. Cl. C07C 29/78 (2006.01); B01D 3/00 (2006.01); B01J 19/00 (2006.01); C07C 29/76 (2006.01); C07C 29/80 (2006.01)
CPC C07C 29/78 (2013.01) [B01D 3/001 (2013.01); B01J 19/0013 (2013.01); C07C 29/76 (2013.01); C07C 29/80 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A device for refining ethanol, comprising a fermentation unit, a low-pressure column, a medium-pressure column, a high-pressure column and a membrane separation unit;
the fermentation unit is respectively connected with a low-pressure column primary preheater and a high-pressure column preheater through pipelines, and the low-pressure column primary preheater is connected and communicated with a low-pressure column secondary preheater through pipelines;
the low-pressure column is connected with the low-pressure column secondary preheater, a top of the low-pressure column is sequentially connected with the low-pressure column primary preheater and a medium-pressure column primary preheater through pipelines, and the low-pressure column is sequentially connected and communicated with a low-pressure column bottom reboiler and the low-pressure column secondary preheater through pipelines;
the medium-pressure column is connected with a medium-pressure column secondary preheater, a top of the medium-pressure column is sequentially connected with a low-pressure column bottom reboiler, a medium-pressure column auxiliary condenser, a membrane evaporator and the membrane separation unit through pipelines, and the medium-pressure column is sequentially connected and communicated with a medium-pressure column bottom reboiler and the medium-pressure column primary preheater through pipelines;
the high-pressure column is connected with a high-pressure column preheater, a top of the high-pressure column is sequentially connected with the medium-pressure column bottom reboiler, a high-pressure column auxiliary condenser and the medium-pressure column secondary preheater through pipelines, and the high-pressure column is sequentially connected and communicated with the high-pressure column bottom reboiler, the medium-pressure column secondary preheater and the high-pressure column preheater through pipelines;
the membrane separation unit is connected with the high-pressure column bottom reboiler;
the low-pressure column, the medium-pressure column and the high-pressure column are all plate columns or packed columns;
a vapor permeable membrane of the membrane separation unit is an inorganic molecular sieve or polyimide fiber membrane.