FIELD: oil and gas industry.
SUBSTANCE: invention discloses a desulfurization unit of associated oil gas, including a unit for absorption of oxidation product equipped with lines of oil inlet/outlet and purified gas outlet, a unit for selective oxidation of hydrogen sulphide and mercaptans located on the sulphur dioxide supply line, including an air feed line and a catalytic reactor with a heater connected to absorption unit by oxidation product supply line. The plant is provided with an inlet line for associated oil gas with an inlet separator connected by line of balance purified gas supply with purified gas supply line, and equipped with condensate discharge line and separation gas discharge line, on which the adsorption unit is placed and equipped with the sulphur dioxide supply line with the unit for selective oxidation located therein which further comprises a heat exchanger "purified gas/oxidation product". The absorption unit includes a separator and a compression and mixing device.
EFFECT: cleaning of associated oil gas from hydrogen sulphide and mercaptans.
2 cl, 1 dwg
