System and method for on-line cleaning of black oil heater...

C - Chemistry – Metallurgy – 10 – B

Patent

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C10B 43/08 (2006.01) B08B 9/032 (2006.01)

Patent

CA 2592568

A system and method whereby on-line cleaning of black oil heater tubes and delayed coker heater tubes may be effectuated by injecting a high pressure water charge through the tubes during normal process operations so as to prevent tube fouling and heater downtime. The high pressure water charge begins the on-line cleaning process once it enters the heater tube by undergoing intense boiling and evaporation. The cleaning occurs by two methods - a scrubbing action and a shocking action. The scrubbing action occurs because of the complete turbulence caused by the water charge's intense boiling within the heater tubes. The shocking action is caused by the expansion and contraction of the heater tubes resulting from the colder water charge flowing through the heater tubes which is then followed by the hotter process fluid flowing through the heater tubes.

Un système et une méthode où un nettoyage en ligne de tubes chauffants à l'huile noire et de tubes chauffants à cokéfation différée peut être effectué par l'injection d'une charge d'eau à haute pression dans les tubes pendant des opérations de processus normales afin d'empêcher l'encrassement des tubes et le temps d'indisponibilité de l'appareil de chauffage. la charge d'eau à haute pression commence le processus de nettoyage en ligne une fois qu'elle est entrée dans le tube chauffant en subissant une intense ébullition et évaporation. Le nettoyage est effectué par deux méthodes : une action de lavage et une action de choc. L'action de lavage se produit en raison de la turbulence complète causée par l'intense ébullition de la charge d'eau dans les tubes chauffants. L'action de choc est causée par l'expansion et la contraction des tubes chauffants à la suite de charge d'eau plus froide s'écoulant dans les tubes chauffants, suivi d'un fluide à procédé plus chaud s'écoulant dans les tubes chauffants.

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