Safe and automatic method for preparation of coke for...

C - Chemistry – Metallurgy – 10 – B

Patent

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Details

C10B 25/08 (2006.01) C10B 25/02 (2006.01) C10B 25/10 (2006.01) C10B 25/20 (2006.01) C10B 33/00 (2006.01) C10B 55/00 (2006.01) C10G 9/14 (2006.01) C10G 9/18 (2006.01)

Patent

CA 2506955

A safe, efficient and repetitively operable coke vessel decoking system is disclosed. In a preferred embodiment the closed system comprises a coker vessel pressure-tightly sealed to a top head system, which includes a closure housing with a laterally moveable horizontal closure member therein and a cutting head enclosure, which further comprises a drill stem guide, an access door, and a cutting assembly mounted therein. A novel feature of the invention is a steam purge/blocking system whereby steam pressure is maintained in the closure housing during the coking cycle to maintain seal integrity. Personnel safety during decoking operations is greatly enhanced by eliminating dangerous manual tasks associated with the prior art such as unbolting and removing top head devices. The system can be remotely and repetitively operated through numerous coking/decoking cycles without removal of any system element.

L'invention concerne un système de décokéfaction dans un récipient à coke, fiable, rentable et exploitable de façon répétitive. Selon une forme d'exécution préférée, le système fermé comprend un récipient à coke assemblé de manière étanche à la pression à un système de tête, comprenant une enveloppe de fermeture comportant un élément de fermeture horizontal déplaçable latéralement, et comprenant par ailleurs un guide de train de tiges, une porte d'accès et un ensemble de coupe associé. L'invention est caractérisée en ce qu'il est prévu un système de blocage/purge de vapeur, grâce auquel la pression de vapeur est maintenue dans l'enveloppe de fermeture durant le cycle de cokéfaction, de manière à maintenir l'intégrité du joint. La sécurité du personnel durant les opérations de décokéfaction est largement accrue en éliminant les tâches manuelles dangereuses, prévues dans la technique antérieure, telles que le déboulonnage et l'enlèvement des dispositifs de tête. Le système peut fonctionner de façon télécommandée et répétitive durant de nombreux cycles de cokéfaction/décokéfaction, sans avoir à retirer un quelconque élément du système.

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