PLANT FOR EXTRACTION OF HYDROCARBONS C FROM NATURAL GAS WITH LOW-TEMPERATURE CONDENSATION Russian patent published in 2021 - IPC C10G5/06 F25J3/00 

FIELD: gas industry.

SUBSTANCE: invention relates to equipment for the extraction of heavy hydrocarbons from natural gas and can be used in the gas industry. The invention relates to an installation for extracting C₃₊ hydrocarbons from natural gas by low-temperature condensation, which includes a first recuperative heat exchanger and a separator located on the natural gas supply line and equipped with a separation gas supply line with a second recuperative heat exchanger and a reducing device. The reducing device is connected to the demethanizer by a separation residue feed line with a reducing device, while the top of the demethanizer is equipped with a stripped gas outlet line, on which the second and first recuperative heat exchangers are located, and the bottom of the demethanizer is equipped with a heater located on the bypass line of the first recuperative heat exchanger. Also, the demethanizer is connected by a demethanized condensate feed line to a fractionation unit equipped with hydrocarbon fractions output lines and connected by a methane-containing gas output line to a stripped gas output line. An additional separator is installed on the separation gas supply line to the demethanizer after the second recuperative heat exchanger, connected to the demethanizer by the separation residue supply line with a reducing device and the additional separation gas supply line to the expander connected by means of kinematic, and/or electric, and/or magnetic, and/or hydraulic devices with driv(s) of compression refrigeration and/or other cooling devices of the fractionation unit.

EFFECT: technical result is an increase in energy efficiency.

1 cl, 1 dwg, 1 ex