发明名称 |
Reabsorber for ammonia stripper offgas |
摘要 |
A method for removal of CO2 from a flue gas stream, comprising the steps of: a) contacting a flue gas stream comprising CO2 with a first absorption liquid comprising NH3 such that the flue gas stream is depleted in CO2; b) contacting the flue gas stream depleted in CO2 of step a) with a second absorption liquid such that NH3 from the flue gas stream is absorbed in said second absorption liquid to form a flue gas stream depleted in CO2 and NH3; c) separating NH3 from the second absorption liquid such that a gas stream comprising NH3 is obtained; d) contacting said gas stream comprising NH3 separated in step c) with a third absorption liquid such that NH3 is absorbed in said third absorption liquid. A system for removal of CO2 from a flue gas stream, the system comprising: a CO2 absorption stage; an NH3 absorption stage; and a reabsorption stage. |
申请公布号 |
US8764892(B2) |
申请公布日期 |
2014.07.01 |
申请号 |
US201313775658 |
申请日期 |
2013.02.25 |
申请人 |
ALSTOM Technology Ltd |
发明人 |
Koss Peter Ulrich;Kozak Frederic Zenon |
分类号 |
B01D53/14 |
主分类号 |
B01D53/14 |
代理机构 |
|
代理人 |
Crawford Robert D. |
主权项 |
1. A system for removal of CO2 from a flue gas stream, the system comprising:
a CO2 absorption stage; an NH3 absorption stage; and a reabsorption stage; said CO2 absorption stage comprising a first gas liquid mass transfer device configured to receive a flue gas stream containing CO2, contact the flue gas stream with a first absorption liquid comprising NH3 such that CO2 from the flue gas stream is absorbed in the first absorption liquid and discharge a flue gas stream depleted in CO2; a first absorption liquid regenerator unit; and an absorption liquid cycle; wherein the first gas liquid mass transfer device and the first absorption liquid regenerator unit are in fluid connection via the absorption liquid cycle such that at least a portion of CO2 rich absorption liquid from the first gas liquid mass transfer device may be directed to the first absorption liquid regenerator unit, and at least a portion of the CO2 lean absorption liquid from the first absorption liquid regenerator unit may be recycled to the first gas liquid mass transfer device; said NH3 absorption stage comprising a second gas liquid mass transfer device configured to receive a flue gas stream depleted in CO2 from the CO2 absorption stage and contact said flue gas stream depleted in CO2 with a second absorption liquid such that NH3 from the flue gas stream is absorbed in said second absorption liquid and a second absorption liquid regenerator unit configured to separate NH3 from the second absorption liquid and discharge a gas stream comprising NH3 in gas or vapor form; and said reabsorption stage comprising a third gas liquid mass transfer device configured to receive a gas stream comprising NH3 discharged from the second absorption liquid regenerator unit and contact said gas stream comprising NH3 with a third absorption liquid such that NH3 is absorbed in said third absorption liquid. |
地址 |
Baden CH |