| 摘要 |
The process for the deacidification of a gaseous effluent comprising an acid compound consisting of hydrogen sulfide and carbon dioxide, comprises contacting the effluent with an absorbent solution by introducing the effluent in lower part of an absorption zone and by introducing the absorbent solution in upper part of the absorption zone to obtain a gaseous effluent impoverished in acid compound and an absorbent solution loaded with acid compound, and cooling a portion of the absorbent solution at 0-70[deg] C by circulating it in the zone and by heat exchange within the zone. The process for the deacidification of a gaseous effluent comprising an acid compound consisting of hydrogen sulfide and carbon dioxide, comprises contacting the effluent with an absorbent solution by introducing the effluent in lower part of an absorption zone and by introducing the absorbent solution in upper part of the absorption zone to obtain a gaseous effluent impoverished in acid compound and an absorbent solution loaded with acid compound, cooling a portion of the absorbent solution at 0-70[deg] C by circulating it in the absorption zone and by heat exchange within the absorption zone, heating the solution loaded with acid compound at 50-150[deg] C so as to separate the solution into two liquid fractions such as a first fraction of solution impoverished in acid compound and a second fraction of solution enriched in acid compound, separating the obtained two fractions, regenerating the second fraction to produce a part of acid compound, and recycling the first fraction of absorbent solution and the regenerated solution as an absorbent solution. The cooling is carried out until the solution reaches a temperature lower than predetermined threshold temperature. A portion of the cooled absorbent solution is reintroduced into the absorption zone. Two different absorbent solutions are withdrawn at different levels of the absorption zone in a flow rate of 20-100%. The second fraction of the absorbent solution is distillated to produce a regenerated absorbent solution impoverished in acid compound by liberating the acid compound in the form of a gas. The deacidification process is carried out in a column using separation techniques such as decantation, centrifugation and filtration, and the recycling process is carried out in a column head. |
