F - Mech Eng,Light,Heat,Weapons – 28 – G
Patent
F - Mech Eng,Light,Heat,Weapons
28
G
F28G 13/00 (2006.01) C10G 9/12 (2006.01)
Patent
CA 2478598
The invention relates to a method and device for at least partially removing carbon deposits from a heat exchanger. The inventive method consists in performing an oxidation treatment comprising at least one controlled oxidation step, at a conventional temperature of between 400 and approximately 500 ·C for at least four hours, using an oxidising fluid containing mostly an inert gas and a minor quantity of oxygen. Said treatment is carried out in conditions such that the temperatures of the fluids entering or leaving the exchanger remain below approximately 520 ·C for the entire duration of the oxidation treatment and such that the hot approach of the exchanger remains below approximately 120 ·C for the entire duration of the oxidation treatment. The invention also relates to a hydrotreatment installation for using said method and device.
L'invention propose un procédé et un dispositif d'élimination au moins partielle de dépôts carbonés dans un échangeur de chaleur dans lequel on effectue un traitement d'oxydation comprenant au moins une étape d'oxydation contrôlée à une température conventionnelle comprise entre 400 et environ 500~C pendant une durée d'au moins 4 heures, au moyen d'un fluide oxydant comprenant majoritairement un gaz inerte, et une quantité mineure d'oxygène, dans des conditions telles que les températures des fluides alimentant ou issus de l'échangeur restent inférieures à environ 520~C pendant toute la durée du traitement d'oxydation, et en ce que l'approche chaude de l'échangeur reste inférieure à environ 120~C pendant toute la durée du traitement d'oxydation. L'invention concerne également une installation d'hydrotraitement pour la mise en oeuvre de ce procédé et de ce dispositif.
Nastoll Willy
Sabin Dominique
Institut Francais Du Petrole
Packinox Sa
Robic
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