FIELD: oil and gas industry.
SUBSTANCE: gas desulfurisation procedure includes preliminary mixing of the treated gas with separator gas balance. The obtained gas mixture is separated at low temperature but in any way not lower than the ice point or gas hydrate formation point, with recovery of sulphur water slurry. The desulfurisation takes place with obtainment of the treated gas and hydrogen sulphide-containing gas. The mixture of hydrogen sulphide-containing gas with a part of separator gas and acid-containing gas with mole ratio of oxygen: hydrogen of 0.35÷0.45 is fed for oxidation. Oxidation products are mixed with a part of sulphur water slurry and the mixture is separated at temperature of 125÷135°C with recovery of liquid sulphur and separator gas.
EFFECT: invention allows increase in gas desulfurisation degree and reduces energy content of the process.
1 dwg, 1 ex
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