EP 2356376 A4 20180228 - CHEMICAL CLEANING METHOD AND SYSTEM WITH STEAM INJECTION
Title (en)
CHEMICAL CLEANING METHOD AND SYSTEM WITH STEAM INJECTION
Title (de)
CHEMISCHES REINIGUNGSVERFAHREN UND -SYSTEM MIT DAMPFEINLEITUNG
Title (fr)
PROCÉDÉ DE NETTOYAGE CHIMIQUE ET SYSTÈME À INJECTION DE VAPEUR
Publication
Application
Priority
- US 2009066652 W 20091203
- US 11971908 P 20081203
- US 63072909 A 20091203
Abstract (en)
[origin: WO2010065785A1] Disclosed are methods and apparatus for cleaning heat exchangers and similar vessels by introducing chemical cleaning solutions and/or solvents while maintaining a target temperature range by direct steam injection into the cleaning solution. The steam may be injected directly into the heat exchanger or into a temporary side stream loop for recirculating the cleaning solution or admixed with fluids being injected to the heat exchanger. The disclosed methods are suitable for removing metallic oxides from a heat exchanger under chemically reducing conditions or metallic species such as copper under chemically oxidizing conditions. In order to further enhance the heat transfer efficiency of heating cleaning solvents by direct steam injection, mixing on the secondary side of the heat exchanger can be enhanced by gas sparging or by transferring liquid between heat exchangers when more than one heat exchanger is being cleaned at the same time.
IPC 8 full level
F22B 37/54 (2006.01); B08B 3/00 (2006.01); C23G 1/00 (2006.01); F22B 37/00 (2006.01); F22B 37/48 (2006.01); F22B 37/52 (2006.01); F22B 37/56 (2006.01); F28G 9/00 (2006.01)
CPC (source: EP)
B08B 3/00 (2013.01); B08B 9/00 (2013.01); C23G 1/00 (2013.01); F22B 37/002 (2013.01); F22B 37/483 (2013.01); F22B 37/52 (2013.01); F22B 37/54 (2013.01); F22B 37/56 (2013.01); F28G 1/166 (2013.01); F28G 9/00 (2013.01); B08B 2230/01 (2013.01); C11D 2111/20 (2024.01); C11D 2111/44 (2024.01)
Citation (search report)
- [Y] DE 102004054471 B3 20060427 - FRAMATOME ANP GMBH [DE]
- [Y] DE 389883 C 19240209 - G & J WEIR LTD, et al
- [Y] US 4581074 A 19860408 - MANKINA NADEZHDA N [SU], et al
- [A] JP S55100804 U 19800714
- [AD] US 5066137 A 19911119 - KING LEONARD T [US]
- See references of WO 2010065785A1
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 MK MT NL NO PL PT RO SE SI SK SM TR
DOCDB simple family (publication)
WO 2010065785 A1 20100610; EP 2356376 A1 20110817; EP 2356376 A4 20180228; EP 2356376 B1 20190828
DOCDB simple family (application)
US 2009066652 W 20091203; EP 09831147 A 20091203