Method of and control system for controlling electrostatic...

B - Operations – Transporting – 03 – C

Patent

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B03C 3/68 (2006.01) B03C 3/14 (2006.01)

Patent

CA 2616564

A method and control system are provided for controlling an electrostatic separator 22. The separator is controlled by selecting a set point value for the grade of one of its product streams, spectroscopically measuring the grade of that product stream and using a simple controller to adjust one of the control variables of the separator 22 automatically to maintain the grade of the one product stream at the set point value. A second control variable is manually adjusted and the automatic control is allowed to adjust the first control variable to maintain the output grade at the set point value. The yield is monitored manually and the second control variable is adjusted manually to optimise the yield, while maintaining the set point grade value.

L'invention concerne un procédé et un système de commande permettant de commander un séparateur électrostatique (22). On commande ledit séparateur par sélection d'une valeur de point de réglage pour la qualité de l'un de ses flux de produits; on mesure spectroscopiquement la qualité de ce flux de produits et on utilise un simple contrôleur pour régler automatiquement l'une des variables de commande du séparateur (22) afin de maintenir la qualité de l'un des flux de produits à la valeur de point de réglage. On règle manuellement une seconde variable de commande, une commande automatique pouvant régler la première variable de commande afin de maintenir la qualité de sortie à la valeur de point de réglage. On surveille manuellement le rendement, la seconde variable de commande étant réglée manuellement afin d'optimiser le rendement tout en conservant la valeur de point de réglage.

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