INSTALLATION OF COMPLEX NATURAL GAS TREATMENT BY LOW-TEMPERATURE CONDENSATION Russian patent published in 2021 - IPC B01D53/00 C10G5/06 F25J3/00 

FIELD: gas industry.

SUBSTANCE: present invention relates to a plant for complex natural gas treatment by low-temperature condensation, including a refrigeration machine, a cooling unit located on the raw natural gas line, a separator connected to the demethanizer by gas supply lines and separation residue with reducing devices, while the bottom of the demethanizer is connected by a demethanized condensate supply line to a fractionation unit equipped with hydrocarbon fraction output lines and equipped with a heater, and the top of the demethanizer is connected by a prepared natural gas output line to a cooling unit. In this case, at least one reducing device is made in the form of an expander, the cooling machine is made of compression, connected to the fractionation unit by lines of input/output of the refrigerant and connected to the expander(s) by means of kinematic, and/or electric, and/or magnetic, and/or hydraulic devices, on the raw natural gas line in front of the cooling unit there is an input separator connected to the fractionation unit by a line of supply of the remainder of the input separation with a reducing device, as a cooling unit, the first recuperative heat exchanger and the demethanizer bottom heater located on its bypass are installed, a second recuperative heat exchanger is placed on the separation gas supply line in front of the reducing device, which is also located on the prepared natural gas output line with the reducing device, while the fractionation unit is connected to the prepared natural gas output line by a methane-containing gas supply line.

EFFECT: proposed installation makes it possible to increase the energy efficiency of the process.

1 cl, 1 dwg, 1 ex