FIELD: oil and gas industry.
SUBSTANCE: plant includes, in the first version, the compression units of the first and second stages, a reducing device, a low-temperature separator, two de-ethanizers, a heat exchanger. In the second and fourth versions, the plant is additionally includes a debutanizer, and in the third and fourth - a purification and/or drying unit. In operation of the plant in the first version, the feed gas is mixed with deethanization gases, compressed and refluxed in the first stage compression unit to obtain condensate, cooled in heat exchanger, compressed and refluxed in the second stage compression unit to produce condensate, fed to the heat exchanger as coolant, and compressed gas which through the reducing device is supplied to low temperature separator from which the gas is supplied as coolant to the second stage compression unit and withdrawn after heating as commercial gas, condensate is fed to the first deethanizer, where it is separated into gas, supplied to deethanization gas supply line and technical propane/automobile propane, withdrawn from the plant. Liquid hydrocarbons are fed to the second deethanizer together with condensates of the first and second stages, where they are separated into gas supplied to the feed gas line and technical propane-butane/technical butane, withdrawn from the plant.
EFFECT: invention provides increased recovery of hydrocarbons, expansion of production range, co-processing of low-pressure hydrocarbon gases and liquid hydrocarbons.
16 cl, dwg 1
