Tube-bundle equipment for processing corrosive fluids

Details Tube-bundle equipment for processing corrosive fluids Tube-bundle equipment for processing corrosive fluids

F - Mech Eng,Light,Heat,Weapons

28

F

F28F 19/06 (2006.01) F28D 7/16 (2006.01)

Patent

CA 2730393

Tube-bundle equipment for heat exchange operations at high pressures and temperatures, under conditions of high aggressiveness of the process fluids, comprising a titanium lining (11) and a series of tubes (1) consisting of at least one layer of zirconium (2), positioned in contact with said fluids, wherein the tube plate on which said tubes are inserted comprises an outer layer (S) of zirconium or an alloy thereof and an underlying layer (5) of titanium welded to the lining of the equipment. Said equipment is particularly used as a heat exchanger, for example as a stripper, in the high-pressure cycle of urea syntheses processes.

L'invention porte sur un équipement à faisceau de tubes pour des opérations d'échange de chaleur à hautes pressions et à hautes températures, dans des conditions de forte agressivité des fluides de traitement, comprenant un revêtement interne de titane (11) et une série de tubes (1) consistant en au moins une couche de zirconium (2), positionnés en contact avec lesdits fluides, la plaque de tubes sur laquelle lesdits tubes sont introduits comprenant une couche externe (S) de zirconium ou d'un alliage de celui-ci, et une couche sous-jacente (5) de titane soudée au revêtement interne de l'équipement. Ledit équipement est en particulier utilisé comme échangeur de chaleur, par exemple comme colonne de rectification, dans le cycle haute pression de traitements de synthèse d'urée.

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