Improved solvent use and regeneration

Details Improved solvent use and regeneration Improved solvent use and regeneration

B - Operations, Transporting

01

D

B01D 53/14 (2006.01)

Patent

CA 2531818

An absorber (110) in a gas treatment plant (100) produces a rich solvent (116) that is flashed to produce flashed rich solvent (134D) and recycle gas (132D), wherein the recycle gas (132D) is not mixed with the absorber feed gas (112) as commonly practiced, but mixed with the rich solvent (116). Such configurations exhibit superior rich solvent loading, thereby reducing solvent circulation. Further contemplated gas treatment plants (100)may also include a regenerator (150) in which carbon dioxide from atmospheric flashed vapor (142) of the rich solvent (144) is employed as a stripping gas in a regenerator (150) to strip hydrogen sulfide from the rich solvent (144), and wherein sweet gas (114) is employed to strip the carbon dioxide from the rich solvent (144).

Un absorbeur (110) dans une installation (100) de traitement de gaz produit un solvant riche (116) lequel est détendu pour produire un solvant détendu riche (134D) et un gaz de recyclage (132D), le gaz de recyclage (132D) n'étant pas mélangé au gaz d'alimentation (112) de l'absorbeur tel que cela est pratiqué couramment mais il est mélangé au solvant riche (116). De telles configurations présentent un chargement en solvant riche supérieur, réduisant ainsi la circulation du solvant. De plus, les installations (100) de traitement de gaz envisagées peuvent également comprendre un générateur (150) dans lequel le dioxyde de carbone provenant d'une vapeur atmosphérique détendue (142) du solvant riche (144) est utilisé en tant que gaz de rectification dans un régénérateur (250) pour extraire le sulfure d'hydrogène du solvant riche (144), et dans lequel un gaz non corrosif (114) est employé pour extraire le dioxyde de carbone du solvant riche (144).

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