PLANT OF LOW-TEMPERATURE SEPARATION WITH FRACTIONATING ABSORPTION LTSFA FOR PROCESSING OF NATURAL GAS WITH EXTRACTION OF HYDROCARBONS C₂₊ (VERSIONS)

摘要

FIELD: oil and gas industry.;SUBSTANCE: invention relates to low-temperature separation plants and can be used in gas industry for extraction of hydrocarbons C₂₊ from natural gas. Two versions of the installation are proposed. In version 1 there is a drying unit, an external cooling circuit in the evaporator, a compressor, a condenser and a reducing device, recuperative heat exchangers, reducing devices, a pump, a weathering unit, a low-temperature separator, a fractionating absorber, a demethanizer and a deethanizer. Version 2 of installation instead of equipment of external cooling circuit includes compressor, refrigerator and reducing device. During operation of the first version of the plant, high pressure gas is dried and cooled in the first recuperative heat exchanger, in the evaporator and in the second recuperative heat exchanger, the cooled gas is reduced and fed into a fractionating absorber cooled by low-temperature separation gas, which is then heated in the first heat exchanger and discharged. Operation of the second version is characterized by that part of high pressure gas is compressed with a compressor.;EFFECT: invention increases output of hydrocarbons.;2 cl, 2 dwg