EP 1052465 B1 20050511 - Process and device for cryogenic air separation
Title (en)
Process and device for cryogenic air separation
Title (de)
Verfahren und Vorrichtung zur Tieftemperaturzerlegung von Luft
Title (fr)
Procédé et appareil pour la séparation cryogénique de l'air
Publication
Application
Priority
DE 19921949 A 19990512
Abstract (en)
[origin: EP1052465A1] To maintain very low air temps., the intake air (1) is passed to an initial rectifying column (3). An overflow fraction (6,7 a given density (p) is taken in a liquid condition from a reservoir (24,16) within the first column (3), is relaxed (14,14a,18), transferred to a further process stage (5,23). The liquid level in the reservoir (24,16) is at a first level (h1) and an initial pressure (p1). The relaxed fraction is brought to a second and higher level (h2(h2 ≥ h1)) at the next stage (5,23) and is hel a second and lower pressure (p2 ≤ p1). The pressure difference DELTA p=p1 x p2 is lower than the hydrostatic pressure (phydr=p x g(h2+h1)) between the two levels, where g is the acceleration of the earth rotation. The relaxation is structured so that the developed gas bubbles reduce the density to give the pressure difference DELTA p to allow the fraction to pass to t next stage (5,23).
IPC 1-7
IPC 8 full level
CPC (source: EP KR US)
F25J 3/04 (2013.01 - KR); F25J 3/04412 (2013.01 - EP US); F25J 3/04678 (2013.01 - EP US); F25J 3/04703 (2013.01 - EP US); F25J 3/04793 (2013.01 - EP US); F25J 3/04872 (2013.01 - EP US); F25J 2235/06 (2013.01 - EP US); F25J 2235/50 (2013.01 - EP US); F25J 2235/58 (2013.01 - EP US)
Citation (examination)
- US 5071458 A 19911210 - GRENIER MAURICE [FR], et al
- DIN ET AL: "Low temperature techniques", 1960, GEORGES NEWNES LTD., LONDON
- STER J.V.: "The production of liquid nitrogen from atmospherique air using a gas refrigerating machine (Thesis)", 1960, TECHNISCHE HOGESCHOOL, DELFT
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
EP 1052465 A1 20001115; EP 1052465 B1 20050511; DE 19921949 A1 20001116; DE 59912043 D1 20050616; ES 2242331 T3 20051101; JP 2000356463 A 20001226; KR 20010049347 A 20010615; US 6308533 B1 20011030
DOCDB simple family (application)
EP 99112289 A 19990625; DE 19921949 A 19990512; DE 59912043 T 19990625; ES 99112289 T 19990625; JP 2000139818 A 20000512; KR 20000025368 A 20000512; US 57038500 A 20000512