Improved scale conditioning agents and treatment method

Details Improved scale conditioning agents and treatment method Improved scale conditioning agents and treatment method

C - Chemistry, Metallurgy

02

F

C02F 5/12 (2006.01)

Patent

CA 2562979

An improved scale conditioning composition and method is disclosed that results in improved dissolution and disruption of tube scale, hardened sludge and other deposits composed primarily of highly densified magnetite such as those found in heat exchange vessels, particularly steam generators. After treatment with the advanced scale conditioning composition, these magnetite rich deposits are more easily removed using known and commercially available high pressure hydro-mechanical cleaning techniques. The present invention further provides effective cleaning in a short period of time and at relatively low temperatures, while reducing the amount of waste produced and reducing the resulting corrosion of carbon and low alloy steel components within the steam generator during the cleaning process.

L'invention concerne une composition améliorée de conditionnement anti-tartre un procédé comprenant la dissolution et la dislocation du tartre, des boues durcies, et d'autres dépôts composés généralement de magnétite très dense, tels que ceux trouvés dans des récipients d'échangeur thermique, en particulier des chaudières à vapeur. Après le traitement au moyen de la composition de conditionnement anti-tartre, les dépôts riches en magnétite s'éliminent plus rapidement au moyen de techniques de nettoyage hydromécaniques haute pression disponibles dans le commerce et connues. L'invention concerne, de plus, un nettoyage efficace sur une courte durée et à des températures relativement faibles, tout en réduisant la quantité de déchets produits et en réduisant la corrosion résultant du carbone et des composants en acier faiblement alliés à l'intérieur de la chaudière à vapeur lors du processus de nettoyage.

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