Performance-based control system

C - Chemistry – Metallurgy – 02 – F

Patent

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Details

C02F 5/08 (2006.01) C02F 1/00 (2006.01) C02F 1/68 (2006.01) C02F 5/00 (2006.01) F02C 7/16 (2006.01) F28F 27/00 (2006.01) C23F 15/00 (2006.01)

Patent

CA 2302245

A method and apparatus for detecting and controlling cooling system characteristics is disclosed. A flow rate of make-up cooling medium is measured. A conductivity of the make-up cooling medium is measured. A conductivity of a recirculating cooling medium is measured. A treatment material feed rate is determined based upon the formula: X-(make-up cooling medium flow rate)(make-up cooling medium conductivity)(.OMEGA.)/(K)(recirculating cooling medium conductivity), where X is a treatment feed rate of a treatment compound, .OMEGA. is a desired concentration of the treatment compound, and K is a constant. A corrosion rate of the recirculating cooling medium is measured. A desired corrosion rate of the recirculating cooling medium is determined. A feed rate of a corrosion inhibitor is calculated according to the following formula: Y = (X)[1+.alpha.(CORR MEASURED/CORR~SET POINT?)], where .alpha. is a value between about 0.1 and about 8Ø

Cette invention concerne un procédé et un appareil qui permettent de mesurer et de réguler les caractéristiques d'un système de refroidissement. Ce procédé consiste à mesurer le débit d'un milieu de refroidissement et d'appoint, puis la conductivité de ce milieu de refroidissement et d'appoint, ainsi que la conductivité du milieu de refroidissement remis en circulation. Le débit d'alimentation en matériau de traitement est déterminé par la formule X = (débit du milieu de refroidissement et d'appoint)(conductivité du milieu de refroidissement et d'appoint)( OMEGA )/(K)(conductivité du milieu de refroidissement remis en circulation). X représente le débit d'alimentation et de traitement en un composé de traitement, OMEGA représente la concentration voulue du composé de traitement et K est une constante. On mesure ensuite le taux de corrosion dudit milieu de refroidissement remis en circulation, après quoi on détermine le taux de corrosion voulu du milieu de refroidissement remis en circulation. Le débit d'alimentation en inhibiteur de corrosion est calculé d'après la formule Y = (X) [1+ alpha (CORRmesurée/CORRpoint de consigne)] où alpha possède une valeur allant d'environ 0,1 à environ 8,0.

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