EP 2179235 A2 20100428 - NITROGEN REJECTION COLUMN REBOILER CONFIGURATION
Title (en)
NITROGEN REJECTION COLUMN REBOILER CONFIGURATION
Title (de)
STICKSTOFFABSCHEIDUNGSKOLONNENAUFKOCHERKONFIGURATION
Title (fr)
CONFIGURATION DE REBOUILLEUR D'UNE COLONNE DE REJET D'AZOTE
Publication
Application
Priority
- IB 2008001742 W 20080616
- US 76497507 A 20070619
Abstract (en)
[origin: US2008314079A1] A process is provided for denitrogenation of a crude LNG stream. A crude LNG stream comprising between about 1% and 10% nitrogen, and the remainder methane and heavier hydrocarbons, is expanded in a means for expansion, and cooled. Resultant crude LNG stream is introduced into nitrogen rejection column, wherein nitrogen content of LNG is reduced. A nitrogen-enriched vapor stream is withdrawn from top of the column, and a nitrogen-diminished liquid stream is withdrawn from bottom of the column. The nitrogen-diminished bottoms LNG stream is pumped to higher pressure and then divided into two streams. The second stream is reduced in pressure and then passed through reboiler heat exchanger, thus cooling the crude LNG stream. Partially vaporized second stream is reinjected into column at a level above the level of withdrawal of nitrogen-diminished bottoms LNG stream and below the level of introduction of crude LNG feed stream to provide column boilup.
IPC 8 full level
F25J 3/02 (2006.01)
CPC (source: EP KR US)
F25J 3/02 (2013.01 - KR); F25J 3/0209 (2013.01 - EP US); F25J 3/0233 (2013.01 - EP US); F25J 3/0257 (2013.01 - EP US); F25J 2200/02 (2013.01 - EP US); F25J 2200/40 (2013.01 - EP US); F25J 2200/70 (2013.01 - EP US); F25J 2215/04 (2013.01 - EP US); F25J 2235/60 (2013.01 - EP US); F25J 2240/30 (2013.01 - EP US); F25J 2240/40 (2013.01 - EP US); F25J 2250/02 (2013.01 - EP US); F25J 2270/02 (2013.01 - EP US)
Citation (search report)
See references of WO 2008155653A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
US 2008314079 A1 20081225; AU 2008264885 A1 20081224; BR PI0812568 A2 20150218; CA 2687886 A1 20081224; CN 102084199 A 20110601; EP 2179235 A2 20100428; JP 2011513503 A 20110428; KR 20100021443 A 20100224; PE 20090450 A1 20090427; RU 2010101417 A 20110727; TW 200902703 A 20090116; WO 2008155653 A2 20081224; WO 2008155653 A3 20110407
DOCDB simple family (application)
US 76497507 A 20070619; AU 2008264885 A 20080616; BR PI0812568 A 20080616; CA 2687886 A 20080616; CN 200880020926 A 20080616; EP 08762994 A 20080616; IB 2008001742 W 20080616; JP 2010512805 A 20080616; KR 20097025820 A 20080616; PE 2008001043 A 20080618; RU 2010101417 A 20080616; TW 97122607 A 20080617