EP 1711765 B1 20130619 - CRYOGENIC DISTILLATION METHOD AND INSTALLATION FOR AIR SEPARATION
Title (en)
CRYOGENIC DISTILLATION METHOD AND INSTALLATION FOR AIR SEPARATION
Title (de)
KRYOGENES DESTILLATIONSVERFAHREN UND ANLAGE ZUR LUFTTRENNUNG
Title (fr)
PROCÉDÉ ET INSTALLATION DE SÉPARATION D'AIR PAR DISTILLATION CRYOGÉNIQUE
Publication
Application
Priority
- FR 2005050011 W 20050107
- FR 0450067 A 20040112
Abstract (en)
[origin: FR2865024A1] Separation of air is obtained by vaporization of pressurised liquid in an exchange line of a air separation unit by heat exchange with a compressed gas at a cryogenic temperature. The process is carried out in an installation comprising a double or triple air separation column operating at a high pressure and with an exchange line, in which (1) all the air is raised to high pressure, greater by at least 5 bars to the mean pressure, and purified; (2) part of the air flow is cooled in the exchanger and divided into two fractions; (3) each fraction is expanded in a turbine; (4) the inlet pressure of each turbine is greater by 5 bars to the mean pressure; (5) the exhaust pressure is equal to the mean pressure; (6) part of the air expanded in one of the turbines is sent to the double or triple column; (7) a cold compressor, mechanically connected to one of the expansion turbines aspirates air, which has been cooled in the heat exchanger, and exhausts air at a temperature higher than the inlet temperature, the fluid thus compressed being re-introduced in the exchanger in which part condenses; (8) at least one liquid from the column is vaporized in the heat exchanger. The turbine not coupled to the cooled compressor is coupled to a compressor followed by a refrigerant, and, optionally, the temperature of aspiration of the cold compressor approximates to the temperature of vaporization of the liquid. An independent claim is also included for the installation of the process.
IPC 8 full level
F25J 3/04 (2006.01)
CPC (source: EP US)
F25J 3/04054 (2013.01 - EP US); F25J 3/0409 (2013.01 - EP US); F25J 3/04175 (2013.01 - EP US); F25J 3/0429 (2013.01 - EP US); F25J 3/04296 (2013.01 - EP US); F25J 3/04303 (2013.01 - EP US); F25J 3/04387 (2013.01 - EP US); F25J 3/04393 (2013.01 - EP US); F25J 3/0446 (2013.01 - EP US); F25J 3/04466 (2013.01 - EP US); F25J 2200/06 (2013.01 - EP US); F25J 2215/52 (2013.01 - EP US); F25J 2215/54 (2013.01 - EP US); F25J 2235/50 (2013.01 - EP US); F25J 2240/04 (2013.01 - EP US); F25J 2240/10 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
FR 2865024 A1 20050715; FR 2865024 B3 20060505; BR PI0506789 A 20070522; BR PI0506789 B1 20180206; CN 100432601 C 20081112; CN 1910419 A 20070207; EP 1711765 A1 20061018; EP 1711765 B1 20130619; EP 1711765 B8 20130828; ES 2425944 T3 20131018; JP 2007518054 A 20070705; PL 1711765 T3 20131031; RU 2006129296 A 20080220; RU 2360194 C2 20090627; UA 89365 C2 20100125; US 2008223076 A1 20080918; WO 2005073651 A1 20050811
DOCDB simple family (application)
FR 0450067 A 20040112; BR PI0506789 A 20050107; CN 200580002063 A 20050107; EP 05717658 A 20050107; ES 05717658 T 20050107; FR 2005050011 W 20050107; JP 2006548362 A 20050107; PL 05717658 T 20050107; RU 2006129296 A 20050107; UA A200607616 A 20050107; US 58583405 A 20050107