EP 3394536 A1 20181031 - METHOD AND DEVICE FOR GENERATING PURE NITROGEN AND PURE OXYGEN BY MEANS OF CRYOGENIC AIR DECOMPOSITION
Title (en)
METHOD AND DEVICE FOR GENERATING PURE NITROGEN AND PURE OXYGEN BY MEANS OF CRYOGENIC AIR DECOMPOSITION
Title (de)
VERFAHREN UND VORRICHTUNG ZUR ERZEUGUNG VON REINEM STICKSTOFF UND REINEM SAUERSTOFF DURCH TIEFTEMPERATURZERLEGUNG VON LUFT
Title (fr)
PROCEDE ET DISPOSITIF DESTINES A LA PRODUCTION D'AZOTE PUR ET D'OXYGENE PUR PAR DECOMPOSITION A BASSE TEMPERATURE DE L'AIR
Publication
Application
Priority
- EP 15003673 A 20151223
- EP 2016002162 W 20161222
Abstract (en)
[origin: WO2017108187A1] The method and device are used for obtaining pure nitrogen and oxygen by low-temperature separation of air. A distillation column system comprises a high-pressure column (20), a low-pressure column (21) and an argon column (22) as well as a high-pressure column top condenser (23), a low-pressure column bottom condenser (24) and an argon top condenser (25). The entire amount of air supplied is compressed to a first pressure in a main air compressor (1). A first sub-stream (10, 6, 15, 16) of the air that has been compressed to the first pressure is cooled in a main heat exchanger (26) and is fed (18) at least in part to the distillation column system. A second sub-stream (7) of the air that has been compressed to the first pressure is cooled in the main heat exchanger (26) and is then at least partially liquefied in the low-pressure column bottom evaporator (24). The at least partially liquefied second sub-stream (31, 33, 19) is introduced at least in part into the distillation column system. A liquid oxygen-enriched fraction (62, 86) is introduced (63, 64, 65) into the evaporation chamber of the high-pressure top condenser (23). An argon-containing oxygen stream (70) from an intermediate point in the low-pressure column (21) is introduced into the argon column (22). The second sub-stream (31) downstream of the low-pressure column bottom evaporator (24) is introduced at least in part into the argon top condenser (25) and is partially evaporated therein. The second sub-stream (33) downstream of the argon top condenser (25) is introduced at least in part into the high-pressure column (20) and/or into the low-pressure column (21).
IPC 8 full level
F25J 3/04 (2006.01)
CPC (source: EP US)
F25J 3/04084 (2013.01 - EP US); F25J 3/0409 (2013.01 - EP US); F25J 3/04175 (2013.01 - EP US); F25J 3/042 (2013.01 - EP US); F25J 3/04296 (2013.01 - EP US); F25J 3/04303 (2013.01 - EP US); F25J 3/04375 (2013.01 - EP); F25J 3/04381 (2013.01 - EP US); F25J 3/04387 (2013.01 - EP US); F25J 3/04393 (2013.01 - EP US); F25J 3/04418 (2013.01 - EP US); F25J 3/04424 (2013.01 - EP US); F25J 3/04624 (2013.01 - EP US); F25J 3/04672 (2013.01 - EP US); F25J 3/04878 (2013.01 - EP US); F25J 2200/04 (2013.01 - EP US); F25J 2200/54 (2013.01 - EP US); F25J 2240/10 (2013.01 - EP US); F25J 2245/58 (2013.01 - EP US); F25J 2250/10 (2013.01 - EP US)
Citation (search report)
See references of WO 2017108187A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2017108187 A1 20170629; AU 2016378091 A1 20180705; EP 3394536 A1 20181031; US 2018372405 A1 20181227
DOCDB simple family (application)
EP 2016002162 W 20161222; AU 2016378091 A 20161222; EP 16826004 A 20161222; US 201616065466 A 20161222