Cleaning and passivating water distribution systems

Details Cleaning and passivating water distribution systems Cleaning and passivating water distribution systems

B - Operations, Transporting

08

B

B08B 9/027 (2006.01) B08B 9/02 (2006.01) E03B 7/09 (2006.01) E21B 37/00 (2006.01)

Patent

CA 2345294

A method to chemically clean and immediately passivate a water distribution system to quickly form a passivation layer. The system may be a potable water system, a non-potable water system, a water well or a fire protection system such as a fire sprinkler system and may be treated with a biocide. A section of the system is isolated and chemically cleaned, then is immediately passivated using a high concentration of passivating agent. A passivating layer quickly forms, then the concentrated passivating agent is removed and a maintenance concentration of passivating agent is added. The cleaned and passivated section is restored to the system to provide improved water flow.

L'invention concerne un procédé permettant de nettoyer chimiquement l'eau et de passiver immédiatement un réseau de distribution d'eau afin de constituer rapidement une couche de passivation. Il peut s'agir d'un réseau d'eau potable ou non potable, d'un puits ou d'un réseau de protection contre le feu, tel qu'une crépine d'incendie, que l'on peut traiter à l'aide d'un biocide. Une section du réseau est isolée et chimiquement nettoyée, puis immédiatement passivée à l'aide d'un agent de passivation à concentration élevée. Une couche de passivation se forme rapidement. L'agent de passivation concentré est éliminé et un agent de passivation à concentration d'entretien est ajouté. La section nettoyée et passivée est réintégrée dans le réseau aux fins d'un meilleur écoulement de l'eau.

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