UNIT FOR C HYDROCARBON RECOVERY FROM NATURAL GAS BY LOW-TEMPERATURE CONDENSATION Russian patent published in 2022 - IPC C10G5/06 F25J3/00 

FIELD: gas industry.
SUBSTANCE: invention relates to equipment for the extraction of heavy hydrocarbons from natural gas, it can be used in the gas industry. The invention relates to an installation for extracting C₃₊ hydrocarbons from natural gas by means of low-temperature condensation, including a first recuperative heat exchanger equipped with a compression refrigeration machine located on the natural gas supply line, and a separator equipped with a separation gas supply line with a second recuperative heat exchanger connected to a demethanizer by a separation residue supply line with a reducing device. The top of the demethanizer is equipped with a line for the withdrawal of topped gas, 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, and is also connected by a line for the supply of demethanized condensate with a fractionation unit equipped with lines for the withdrawal of hydrocarbon fractions and connected by a line for the withdrawal of methane-containing gas with a line for the withdrawal of topped gas. On the separation gas supply line to the demethanizer, after the second recuperative heat exchanger, an additional separator is installed, connected to the demethanizer by a separation residue supply line with a reducing device and an additional separation gas supply line with an expander connected by kinematic, and/or electric, and/or magnetic, and/or hydraulic devices with a drive(s) of the compression refrigeration machine and/or other cooling devices of the fractionation unit and a refrigeration machine connected to the first recuperative heat exchanger.

EFFECT: increased energy efficiency.

1 cl, 1 ex, 1 dwg