Device for protecting metallic surfaces from condensates of...

C - Chemistry – Metallurgy – 21 – B

Patent

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C21B 9/06 (2006.01) F27D 1/00 (2006.01)

Patent

CA 2577541

The supporting structure of a technical installation made of a material that is not resistant to corrosion and whose inner wall at least temporarily contains a corrosive and abrasive gas/vapor mixture and is protected from acid corrosion by a gas/vapor mixture barrier. This barrier is either placed between a fire-resistant coating (6) and the highly heat insulating layer (7) or is integrated in the fire-resistant layer (6) or in the heat insulating layer (7). The mechanical protection from the permeation of the gas/vapor mixture though the heat insulating insulation (7) up to the inner wall of the supporting structure enables a heat insulating material to be selected that has a distinctly reduced thermal conductivity and thus enables the temperature on the exterior of the supporting structure to be lowered whereby reducing the loss of energy and the increasing the level of industrial safety.

L'invention concerne une structure porteuse d'une installation technique en matériau ne résistant pas à la corrosion, dont la paroi interne contient au moins temporairement un mélange gaz-vapeur corrosif et abrasif et est protégée d'une corrosion acide par une barrière au mélange gaz-vapeur. Cette barrière est placée au choix entre un revêtement (6) résistant au feu et la couche hautement calorifuge (7) ou est intégrée dans la couche (6) résistante au feu ou dans la couche calorifuge (7). Grâce à la protection mécanique contre la pénétration du mélange gaz-vapeur dans l'isolation calorifuge (7) jusqu'à la paroi interne de la structure porteuse, il est possible de sélectionner un matériau calorifuge à conductivité thermique sensiblement réduite et, donc, d'abaisser la température sur la face externe de la structure porteuse. On réduit ainsi la perte d'énergie et on augmente la sécurité de travail.

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