METHOD OF LOW-POTENTIAL GAS RECOVERY Russian patent published in 2010 - IPC B01D53/14 C07C7/11 

FIELD: process engineering.

SUBSTANCE: proposed method comprises compressing low-potential gas, adding regenerated absorber therein to absorb impurities therefrom, feeding cooling and gate fluid, separating compressed low-potential gas from saturated absorber, bleeding compressed gas as product, bleeding saturated absorber for recovery, using recovered absorber for additional contacting with separated compressed low-potential gas in counter-flow and bleeding separated absorber in a single flow. Saturated and heated absorber is fed in two flows for recovery: first flow after compression, cleaning and drying of compressed low-potential gas, and second flow after cleaning and drying of the main high-pressure gas. Temperature of recovered absorber flows corresponds to that of saturated absorber. Compressed and dried low-pressure gas is heated to (20-40)°C above temperature of fluid hydrocarbon condensation.

EFFECT: higher efficiency of low-pressure gas recovery with no increase in amount of process equipment.

4 cl, 1 dwg