EP 3027988 A2 20160608 - METHOD AND DEVICE FOR PRODUCING COMPRESSED NITROGEN
Title (en)
METHOD AND DEVICE FOR PRODUCING COMPRESSED NITROGEN
Title (de)
VERFAHREN UND VORRICHTUNG ZUR ERZEUGUNG VON DRUCKSTICKSTOFF
Title (fr)
PROCÉDÉ ET DISPOSITIF DE PRODUCTION D'AZOTE COMPRIMÉ
Publication
Application
Priority
- EP 13003861 A 20130802
- EP 2014002074 W 20140729
- EP 14744775 A 20140729
Abstract (en)
[origin: WO2015014485A2] The invention relates to a method and to a device that serve for producing compressed nitrogen by low-temperature decomposition of air in a distillation column system which has a high-pressure column (202), a low-pressure column (203), a high-pressure column head condenser (204) and a low-pressure column head condenser (205). A main air compressor (9) constitutes the only gas compressor powered by external energy. In the main air compressor (9) the feed air is compressed to a total air pressure which is at least 5 bars above the operating pressure of the high-pressure column (202). A first part-stream (56) of the high-pressure total air stream (11, 811) from the main air compressor (9) is expanded to perform work as operating pressure of the high-pressure column or a higher pressure (57) and is introduced into the distillation column system (201). A second part-stream (52, 55) of the high-pressure total air stream (11, 811) is cooled in a main heat exchanger (51) and is introduced at least partially in liquid form into the distillation column system (206, 210). An internally compressed nitrogen stream is formed by a part-stream (319) of the liquid nitrogen stream (215) from the high-pressure column head condenser (204) and/or a part-stream (234, 334) of the liquid nitrogen stream (232) from the low-pressure column head condenser (205); the internally compressed nitrogen stream is brought in the liquid state to a product pressure (235, 335a, 335b) which is between 15 and 100 bars; then the internally compressed nitrogen stream is heated in the main heat exchanger (51) and then extracted as a gaseous compressed nitrogen product (60) below the product pressure.
IPC 8 full level
F25J 3/04 (2006.01)
CPC (source: EP US)
F25J 3/04018 (2013.01 - EP US); F25J 3/04024 (2013.01 - EP US); F25J 3/04048 (2013.01 - EP US); F25J 3/04054 (2013.01 - EP US); F25J 3/0406 (2013.01 - EP US); F25J 3/04084 (2013.01 - EP US); F25J 3/04115 (2013.01 - EP US); F25J 3/04121 (2013.01 - EP US); F25J 3/04127 (2013.01 - EP US); F25J 3/04145 (2013.01 - EP US); F25J 3/04175 (2013.01 - EP US); F25J 3/04296 (2013.01 - EP US); F25J 3/04303 (2013.01 - US); F25J 3/04339 (2013.01 - EP US); F25J 3/04351 (2013.01 - EP US); F25J 3/04387 (2013.01 - EP US); F25J 3/04393 (2013.01 - EP US); F25J 3/04424 (2013.01 - EP US); F25J 3/04569 (2013.01 - EP US); F25J 3/04781 (2013.01 - EP US); F25J 3/04787 (2013.01 - EP US); F25J 3/04872 (2013.01 - EP US); F25J 3/04878 (2013.01 - EP US); F25J 2200/20 (2013.01 - EP US); F25J 2200/52 (2013.01 - EP US); F25J 2200/54 (2013.01 - EP US); F25J 2205/04 (2013.01 - EP US); F25J 2230/40 (2013.01 - EP US); F25J 2235/52 (2013.01 - EP US); F25J 2240/04 (2013.01 - EP US); F25J 2240/10 (2013.01 - EP US); F25J 2245/02 (2013.01 - EP US); F25J 2245/40 (2013.01 - EP US); F25J 2270/02 (2013.01 - EP US)
Citation (search report)
See references of WO 2015014485A2
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 2015014485 A2 20150205; WO 2015014485 A3 20150924; EP 3027988 A2 20160608; MX 2016001221 A 20160524; US 2016161181 A1 20160609
DOCDB simple family (application)
EP 2014002074 W 20140729; EP 14744775 A 20140729; MX 2016001221 A 20140729; US 201414906162 A 20140729