FIELD: gas industry.
SUBSTANCE: group of inventions relates to installations for the preparation of associated petroleum gas with the production of propane-butane fraction (PBF), which can be used in the oil industry for processing associated petroleum gas (APG). The unit for the preparation of associated petroleum gas with the production of propane-butane fraction includes a compressor station located on the line for supplying a mixture of APG and stabilization gas, a reflux condenser with an external cold source, a device for stabilization and a separator with lines for gas and residue withdrawal. The unit is equipped with an APG supply line with a two-stage compressor station, between the first and second stages of which there is a stabilization gas supply line. After the compressor station, there is a recuperative heat exchanger and a separator equipped with a residue outlet line with a reducing device and a gas supply line, on which a reflux condenser with an external cold source is located, equipped with a hydrate inhibitor inlet line, a reflux outlet line with a reducing device and a reflux gas supply line, on which a recuperative heat exchanger is located, equipped with a dry stripped gas (DSG) outlet line. A three-phase separator is installed on the reduced separation residue and reflux output lines as a stabilization device, equipped with a waste hydrate inhibitor outlet line and an unstable hydrocarbon condensate outlet line, on which a stripping column with a heated bottom is located, equipped with a PBF outlet line and an off-gas outlet line, which is connected to the three-phase separator gas outlet line, forming a stabilization gas supply line.
EFFECT: reduced energy consumption for cooling the compressed gas.
4 cl, 4 dwg
