FIELD: process engineering.
SUBSTANCE: invention relates to removal of sulphur-bearing gases from unrefined gases. Note here that removed sulphur-bearing gases are processed gases at high regeneration pressure. This allows the feed of sulphur-bearing gases into storage with lower costs for compression. Unrefined gas is fed to absorption tower to it to be cleaned of sour gas components with the help of physical absorbent. Absorbent saturated with sulphur-bearing gases and those suitable for use is, then, fed in high-pressure stripping tower for evaporation of the portion of absorbent and production of extraction steam. Extraction steam is used for separation of co-absorbed gases suitable for use. The latter are output from high-pressure stripping tower top end. Absorbent contained in vapours of stripping tower top end is liquefied and derived back into high-pressure stripping tower. Absorbent flow from bottom end of said tower is fed to high-pressure regeneration tower for separation of sulphur-bearing gases and derivation at high pressure in regeneration tower top end. Regenerated absorbent is derived from said bottom end into absorption tower.
EFFECT: cleaning of unrefined gas from sulphur-bearing components to the amount of several ppm.
16 cl, 1 dwg
