NITROGEN COMPRESSOR STATION (EMBODIMENTS) Russian patent published in 2018 - IPC B01D53/00 

FIELD: gas industry.

SUBSTANCE: claimed group of technical solutions relates to the field of membrane gas separation. Nitrogen compressor station of embodiment (1) comprises a piston multistage compressor (1), first and second gas separating devices (2, 3). Outlet of the gas mixture of fourth compression stage (12) is connected to the inlet of the gas mixture of first gas separation device (2). Permeate outlet of first gas separation device (2) is connected to the inlet of second compression stage (10). Outlet of the gas mixture of fourth compression stage (12) is further connected to the inlet of second gas separating device (15) through first shut-off and regulating device (4). Besides, the retentate outlet of second gas separation device (3) is connected to the inlet of third compression stage (11) via second shut-off and regulating device (5). As for the nitrogen compressor station of embodiment (2), the outlet of the gas mixture of third stage compression (11) is connected to the inlet of the gas mixture of first gas separation device (2). Permeate outlet of first gas separation device (2) is connected to the inlet of first compression stage (9). Outlet of the gas mixture of third compression stage (11) is further connected to the inlet of second gas separating device (3) through the first shut-off and regulating device (4). Retentate outlet of second gas separation device (3) is connected to the inlet of second compression stage (10) through second shut-off and regulating device (5). As for the nitrogen compressor station of embodiment (3), the outlet of the gas mixture of third stage compression (11) is connected to the inlet of the gas mixture of first gas separating device (2). Permeate outlet of first gas separation device (2) is connected to the inlet of second compression stage (10). Outlet of the gas mixture of third compression stage (11) is further connected to the inlet of second gas separating device (3) through the first shut-off and regulating device (4). Retentate outlet of second gas separation device (3) is connected to the inlet of third compression stage (11) via second shut-off and regulating device (5).

EFFECT: increase in the volume of the gas-air medium entering the gas-separating device and an increase in productivity are achieved.

12 cl, 6 dwg, 1 tbl