FIELD: gas industry.
SUBSTANCE: invention relates to equipment for the field preparation of natural gas and can be used in the gas industry. The proposed installation includes two separators, two recuperative heat exchangers, a demethanizer, reducing devices and a fractionation unit. During the operation of the installation, raw natural gas is separated in the first separator into a residue, which is reduced, and the gas, which is divided into two streams, the first gas is fed for cooling to the demethanizer heater, mixed with the second stream cooled in the first recuperative heat exchanger, and separated in the second separator into gas cooled in the second recuperative heat exchanger and the residue, which are reduced and fed to the demethanizer, from the bottom of which the demethanized condensate together with the reduced inlet separation residue is fed to the fractionation unit, from which hydrocarbon fractions are removed in a given assortment. The prepared gas discharged from the top of the demethanizer is reduced, heated in recuperative heat exchangers, fractionation unit, mixed with methane-containing gas from the fractionation unit and removed.
EFFECT: improved energy efficiency.
1 cl, 1 dwg
