METHOD OF PREPARING HYDROCARBON GAS FOR TRANSPORTATION Russian patent published in 2016 - IPC E21B43/34 B01D53/00 

FIELD: gas industry.

SUBSTANCE: invention relates to hydrocarbon gas processing at low-temperatures and can be used in the processes of field preparation for transportation of gas-condensate fields products. According to the method of hydrocarbon gas preparation for transportation the gas flow from well clusters is supplied for primary separation, methanol from water-methanol solution is desorbed with the gas flow, the gas flow is added with the methanol, the gas flow is cooled with air, hydrocarbon condensate and gas in two stages, secondary separation of the gas flow is performed, the gas flow is added with methanol, the gas flow is cooled with gas, and due to pressure reduction final separation of the gas flow is performed, separated gas is heated in three stages with the gas flow, and the gas is withdrawn from the plant, liquid phase after the primary separation of the gas flow is mixed with the water solution after desorption of methanol, it is added with the liquid phase after the secondary separation of the gas flow, delivered for separation from hydrocarbon condensate, gas and aqueous solution, gas is added to the gas flow before the final separation, aqueous solution is extracted from the plant, the liquid phase after the final separation is directed for separation into hydrocarbon condensate, gas and water-methanol solution, the gas is returned for repeated final separation together with the gas flow, the water-methanol solution is introduced into the gas flow, aqueous solution is extracted from the gas flow, the hydrocarbon condensate is heated with the gas flow and mixed with hydrocarbon condensate after the primary and the secondary separations, the hydrocarbon condensate is delivered for separation of low-pressure gas and water-methanol solution, the low-pressure gas is ejected into the gas flow, the hydrocarbon condensate and the water-methanol solution are extracted from the plant. Liquid phase separated at the secondary separation is directed into the low-pressure gas flow.

EFFECT: technical result is intensification of low-temperature gas separation with desorption of methanol from water-methanol solution into the separated gas.

1 cl, 1 dwg, 1 tbl