| 摘要 |
FIELD: process engineering. ^ SUBSTANCE: invention relates to chemistry. Hydrogen sulphide is removed from natural gas flow bearing methane CH4 and H2S to cool said flow in heat exchanger 13, 16, 18. At least, portion of cooled flow is fed via feed pipeline 19, 21 into cyclone expander-separator 1. Here, cooled flow is expanded in nozzle 4 to be additionally cooled to temperature and pressure below dew point of hydrogen sulphide and separated in tubular separation chamber 9 into fraction of cooled low-density fluid. Said fraction is rich in methane and hydrogen sulphide depleted. Another fraction of aforesaid cooled flow represents high-density fluid rich in hydrogen sulphide and methane-depleted. Low-density cooled fluid flow is fed in gas product pipeline 33 communicated with heat exchanger 14 to cool down natural gas flow fed into cyclone expander-separator 1. High-density cooled fluid flow is fed in fractionator 8 for additional separation. ^ EFFECT: higher yield. ^ 4 dwg |
