METHOD OF DEHYDRATION OF HYDROCARBON GAS Russian patent published in 2000 - IPC

FIELD: dehydration of gases; applicable in gas and oil industries. SUBSTANCE: method includes inertial separation of liquid drops from unstripped gas in separator with gas preliminary dehydration to remove steam; gas supply to spraying absorber for dehydration with absorbent; separation of solution drops of wet absorbent and its vapors from spraying absorber from gas; final dehydration from steam before its supply to main pipeline; withdrawal of absorbent saturated with water from spraying absorber for regeneration to regenerator and recirculation of regenerated and purified from mechanical impurities absorbent to spraying absorber. In so doing, inertial separation of liquid drops from unstripped gas and its preliminary dehydration to remove steam are effected by surface-turbulent mixing in cylindrical spiral pipe with multiple-thread screw corrugations with L/S ≥ 2, N ≥ 3, and D/d ≤ 3 with velocity of unstripped gas running against corrugations of 30-400 m/s, with continuous withdrawal of liquid from internal surface of corrugation. Separation of solution drops of wet absorbent and its vapors and final dehydration of gas steam are carried out by surface-turbulent mixing of gas in cylindrical spiral pipe with multiple-thread screw corrugations with L/S ≥ 2, N ≥ 3 and D/d ≤ 3, and velocity of gas running against corrugations of 50-400m/s, with continuous withdrawal of solution of wet absorbent from internal surface of corrugation to regenerator and its recirculation to absorber, where L is pipe length; S is lead of screw corrugation helix; N is number of corrugations in pipe cross-sections; D is maximum outer diameter of cylindrical profile of spiral pipe; and d is minimum inner diameter of cylindrical profile of spiral pipe. EFFECT: reduced consumption and losses of absorbent.