Methods and apparatus for monitoring water process equipment

G - Physics – 01 – M

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G01M 3/08 (2006.01) F22B 37/42 (2006.01) G01M 3/32 (2006.01)

Patent

CA 2304181

Methods and apparatus are provided for detection of leaks in boilers containing a temperature control liquid which is supplemented with feedwater and removed as blowdown, main steam and sootblower steam. In a preferred embodiment, the boiler has an automatic liquid level control mechanism. The methods include measuring rates associated with feedwater supplementation and removal, correcting for the offsets between the supplementation and removal rates, determining the unaccounted for water rate, and comparing the unaccounted for water rate with zero to determine if a leak condition is present.

L'invention porte sur des procédés et appareils de détection de fuites dans des chaudières (14) contenant un liquide de régulation de température complété par de l'eau d'alimentation (36) et prélevé sous forme de purge (26), de vapeur principale et de vapeur de ramonage. Dans l'une des variantes préférées, la chaudière est munie d'une régulation automatique du niveau du liquide. Le procédé consiste à mesurer les débits associés à l'eau d'appoint et aux prélèvements, à corriger les décalages entre le débit d'eau d'appoint et les débits des prélèvements, à déterminer le débit d'eau manquant, et à comparer le débit d'eau manquant avec zéro pour déterminer si on est en présence d'une fuite.

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