EP 3870917 B1 20240327 - METHOD AND INSTALLATION FOR CRYOGENIC SEPARATION OF AIR
Title (en)
METHOD AND INSTALLATION FOR CRYOGENIC SEPARATION OF AIR
Title (de)
VERFAHREN UND ANLAGE ZUR TIEFTEMPERATURZERLEGUNG VON LUFT
Title (fr)
PROCÉDÉ ET INSTALLATION DE SÉPARATION CRYOGÉNIQUE D'AIR
Publication
Application
Priority
- EP 18020545 A 20181023
- EP 2019025355 W 20191022
Abstract (en)
[origin: WO2020083527A1] The invention relates to a method for a low-temperature air separation in which an air separation unit (100, 200) with a distillation column system (10) is used that has a high-pressure column (11) operated at a first pressure range and a low-pressure column (12) operated at a second pressure range below the first pressure range. A first sump liquid which has a higher content of oxygen and a lower content of nitrogen than atmospheric air and a first head gas which has a lower content of oxygen and a high content of nitrogen than atmospheric air are formed in the high-pressure column (11) using a low-temperature rectification process; a second sump liquid which has a higher content of oxygen and a lower content of nitrogen than the first sump liquid and a second head gas which has a higher content of nitrogen and a lower content of oxygen than the first sump liquid are formed in the low-pressure column (12) using a low-temperature rectification process; and the second head gas or a component thereof is drawn from the low-pressure column (12) in the form of unpurified nitrogen. A fraction of the unpurified nitrogen, in the form of a return quantity, is heated, compressed to a pressure level in the first pressure range, cooled, and fed to the high-pressure column (11) one after the other. The invention likewise relates to an air separation unit (100, 200).
IPC 8 full level
F25J 3/04 (2006.01)
CPC (source: EP KR)
F25J 3/04206 (2013.01 - EP KR); F25J 3/04315 (2013.01 - EP KR); F25J 3/0443 (2013.01 - EP KR); F25J 3/0446 (2013.01 - EP KR); F25J 2200/04 (2013.01 - EP KR); F25J 2230/42 (2013.01 - EP KR); F25J 2235/50 (2013.01 - EP KR); F25J 2245/42 (2013.01 - EP KR); F25J 2245/50 (2013.01 - EP KR); F25J 2250/02 (2013.01 - EP KR); F25J 2250/40 (2013.01 - EP KR); F25J 2250/50 (2013.01 - EP KR)
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
DOCDB simple family (publication)
WO 2020083527 A1 20200430; CN 112805524 A 20210514; CN 112805524 B 20221206; EP 3870917 A1 20210901; EP 3870917 B1 20240327; EP 3870917 C0 20240327; KR 20210077687 A 20210625
DOCDB simple family (application)
EP 2019025355 W 20191022; CN 201980066047 A 20191022; EP 19797567 A 20191022; KR 20217011316 A 20191022