PLANT FOR CLEANING GAS Russian patent published in 1994 - IPC

FIELD: gas industry. SUBSTANCE: natural gas with admixtures H₂S and CO₂ enters separator 1 where liquid is separated and is directed to absorber 2 where it is cleaned of H₂S and CO₂ by aqueous solutions of monoethanol amine (or diethanol amine). Gas thus purified is directed to user. Gases from saturated solution of amine are removed in aerator 3, after which it is delivered, via recuperative heat exchanger 4, to desorber 5 where regeneration of amine takes place due to its heating in evaporator 10. Regenerated solution of amine is delivered from desorber 5 to buffer reservoir 6, recuperative heat exchanger 4, air cooler 9, water heat exchanger 8, pump 7 and liquid-and-gas jet apparatus 15. Low-potential gas from aerator 3 is also fed to liquid-and-gas jet apparatus 15 and two-phase mixture thus formed flows to absorber 2. Acid gases and water steam from desorber 5 enter reservoir 12 via air heat exchanger 14 and water heat exchanger 13 wherefrom they are discharged to Clause furnace and liquid is fed to desorber 5 by means of pump 11. EFFECT: enhanced efficiency. 1 dwg