FIELD: oil industry.
SUBSTANCE: invention relates to methods of field preparation of hydrocarbon gases and can be used in the oil industry for processing associated oil gas (AOG) to produce a broad fraction of light hydrocarbons (BFLH). The unit is equipped with two AOG supply lines - AOG of the first separation stages and AOG of the end separator unit. The first and second compressor stations are located in the lines, respectively. Before the first compressor station, there is an adjacent line for the stabilization gas supply line, and after it there is an adjacent line for the separation gas supply line from the second separator located after the second compressor station, as well as a recuperative heat exchanger and the first separator. The first separator is equipped with a residue output line with a reducing device and a gas supply line, in which a deflegmator with an external cold source is located. The dephlegmator is equipped with a hydrate formation inhibitor input line, a phlegm output line with a reducing device, and a dephlegmation gas supply line. In the dephlegmation gas supply line, there is a recuperative heat exchanger equipped with a dry stripped gas output line. The second separator is equipped with a residue output line with a reducing device. After the second separator, there are adjacent lines for the supply of reduced residues from the first separator and phlegm, as well as a three-phase separator as a stabilization device. The three-phase separator is equipped with lines for the output of the spent hydrate formation inhibitor, BFLH and the supply of stabilization gas with a reducing device. In Versions 3 and 4 of the installation, the upper part of the deflegmator is equipped with a heat and mass transfer section. In Versions 2 and 4 of the installation, the recuperative heat exchanger is located after the first separator.
EFFECT: reducing metal and energy consumption.
4 cl, 4 dwg
