METHOD AND SYSTEM FOR PRODUCTION OF LEAN METHANE-CONTAINING GAS FLOW Russian patent published in 2020 - IPC F25J3/02 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to a method and system for production of a flow of lean methane-containing gas (22). Flow of hydrocarbon material (10) is fed into separator (100). Bottom liquid flow (12) is discharged from separator (100). Lower liquid flow (12) is directed to stabilization column (200). Stabilized condensate (13) stream enriched with pentane is removed from stabilization column (200). Top stream of stabilizer (14) enriched with ethane, propane and butane is removed from stabilization column (200). Upper flow of stabilizer (14) is separated in accordance with ratio of flow division into part of main flow (15) and part of withdrawn flow (16). Part of bleed stream (16) is directed to fractionation unit (300) to produce ethane enriched stream (17) and lower stream enriched with propane and butane (18).

EFFECT: technical result is reduction of capital and operating costs.

13 cl, 2 dwg