Insulating inserts for elevated temperature process vessels

Details Insulating inserts for elevated temperature process vessels Insulating inserts for elevated temperature process vessels

B - Operations, Transporting

01

J

B01J 19/26 (2006.01) B01J 19/02 (2006.01) B05B 1/02 (2006.01)

Patent

CA 2462114

Insulating members are provided for use in nozzles of elevated temperature process vessels employing a structural metal shell (24), an insulating refractory lining (14) and a corrosion-resistant membrane (18) lining between the structural shell and refractory lining. The insulating members comprise pre-formed insulating sleeves and inserts and are made of a thermally insulating material having sufficient thickness and sufficiently low thermal conductivity such that, when the sleeve or insert is heated by the process temperature during operation of the vessel, the thermal energy transmitted through the sleeve or insert to the membrane is insufficient to raise the temperature of the membrane above a target temperature. The most preferred thermally insulating materials are fluoropolymers such as poly(tetrafluoroethylene) flouropolymer resins.

L'invention concerne des éléments isolants utilisés dans des buses de récipients de traitement haute température possédant une coquille galvanique (24), un garnissage réfractaire isolant (14) et un garnissage de membrane résistant à la corrosion (18) situé entre la coquille structurelle et le garnissage réfractaire. Les éléments isolants comprennent des manchons isolants préformés et des inserts et sont fabriqués à partir d'un matériau thermiquement isolant possédant une épaisseur suffisante et une conductivité thermique suffisamment faible pour que, lorsque le manchon ou l'insert est chauffé par la température de traitement durant le fonctionnement du récipient, l'énergie thermique transmise à travers le manchon ou l'insert à la membrane soit insuffisante à élever la température de la membrane au-dessus d'une température cible. Parmi les matériaux thermiquement isolants idéaux, on peut citer des fluoropolymères tels que des résines fluoropolymères poly(tétrafluoroéthylène).

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