EP 1020695 A1 20000719 - Power savings for gas separation at turndown
Title (en)
Power savings for gas separation at turndown
Title (de)
Leistungsersparnisse für die Gastrennung bei Teillastbetrieb
Title (fr)
Econonies de puissance pour la séparation de gaz à charge partielle
Publication
Application
Priority
EP 99300202 A 19990112
Abstract (en)
Cryogenic gas separation to provide product (105,106) at design pressure is selectively operated at design flow or at turndown, especially at greater than 30% turndown (less than 70% design flow), by suction throttling (10) the supply feed compressor (1) at turndown to reduce the supply feed (102) pressure to the distillation column system (3,4,5,6) and operating the system at sufficiently reduced product (105,106) recovery to maintain the product pressure. Preferably, the compressor (1) has variable angle guide vanes permitting up to 30% turndown before suction throttling (10) the compressor (1) to allow greater turndown without compressor surge. The arrangement has particular application to dual column nitrogen generators. <IMAGE>
IPC 1-7
IPC 8 full level
F25J 3/04 (2006.01)
CPC (source: EP)
F25J 3/04284 (2013.01); F25J 3/04412 (2013.01); F25J 3/04781 (2013.01); F25J 3/04812 (2013.01); F25J 2230/40 (2013.01); F25J 2240/42 (2013.01); F25J 2290/10 (2013.01)
Citation (search report)
- [XY] GB 2126700 A 19840328 - PETROCARBON DEV LTD
- [Y] EP 0465193 A1 19920108 - AIR PROD & CHEM [US]
- [A] EP 0250390 A2 19871223 - VOEST ALPINE AG [AT]
Designated contracting state (EPC)
BE DE ES FR GB IT NL
DOCDB simple family (publication)
EP 1020695 A1 20000719; EP 1020695 B1 20031008; DE 69911905 D1 20031113; DE 69911905 T2 20040902
DOCDB simple family (application)
EP 99300202 A 19990112; DE 69911905 T 19990112