B - Operations – Transporting – 30 – B
Patent
B - Operations, Transporting
30
B
B30B 9/00 (2006.01) B30B 9/04 (2006.01) B30B 9/22 (2006.01)
Patent
CA 2160889
In discontinuously functioning filter presses (1), a further increase of the pressing pressure is limited based on the course over time of the discharge behavior of the pressed-out liquid. The limiting times are determined with a process regulator (24) as those times at which momentary or average discharge capacities or discharge accelerations reach maximal values. Troublesome predeterminations of desired or empirical values can thus be avoided. The press operates in a process of self-optimization to the pressing pressures and to the times to which the pressure increase has to be limited, in view of the actual process parameters and objectives that are involved.
L'invention a pour objet un procédé limitant la poursuite de la montée en pression d'un filtre-presse (1) à fonctionnement discontinu, sur la base de l'évolution temporelle du comportement d'écoulement du liquide extrait par pression. A cet effet, une commande de processus (24) détermine les moments de limitation qui correspondent aux moments où les débits ou les accélérations d'écoulement momentanés ou moyens atteignent des valeurs maximales. Ceci permet d'éviter le recours à des valeurs de consigne ou à des valeurs expérimentales erratiques. La presse fonctionne selon un processus d'auto-optimisation avec des pressions et des cycles indiquant que la montée en pression doit être limitée en fonction des paramètres du procédé et des objectifs de l'instant.
Bucher-Guyer Ag Maschinenfabrik
Osler Hoskin & Harcourt Llp
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