METHOD OF EXTRACTING CFRACTION FROM RAW GAS AND PLANT FOR ITS IMPLEMENTATION Russian patent published in 2017 - IPC F25J3/02 

FIELD: oil and gas industry.

SUBSTANCE: proposed method allows to extract sales gas and C₂₊ fraction from natural gas by low-temperature separation, rectification and heat transfer. Plant for the extraction of C₂₊ fraction of raw gas contains a demethaniser column equipped with a boiler and plates, five recuperative heat exchangers, a low-temperature separator, three turbochargers, two turbo-expander units, each of which includes a turboexpander and a turbocharger mounted on a single shaft with a turboexpander, a choke, an air cooling unit, propane cooling section and connecting pipelines.

EFFECT: improving efficiency of the proposed technology by simplifying gas processing scheme and reducing capital and energy costs without deteriorating the quality of the products.

2 cl, 1 dwg, 2 tbl