A DYNAMIC-MODEL OF PRESSURE SCREENS FOR FAULT-DETECTION

TitleA DYNAMIC-MODEL OF PRESSURE SCREENS FOR FAULT-DETECTION
Publication TypeJournal Article
Year of Publication1995
AuthorsESTEVEZREYES, L. W., and G. A. Dumont
JournalTAPPI Journal
Volume78
Pagination123-128
Date PublishedSEP
Type of ArticleArticle
ISSN0734-1415
KeywordsDEFECT DETECTORS, detection, MATHEMATICAL MODELS, PRESSURE SCREENS, process control
Abstract

The `'classical'' control scheme for pulp pressure screens regards the screen as a static system. Out of several faults that could occur during screen operation, it addressed only the possibility of plate plugging. Among other drawbacks, this method restricts the screen throughput. After testing different parametric and nonparametric methods for fault detection on screens, it was could that a mathematical model developed at the Pulp and Paper Centre in The University of British Columbia has potential for its use as diagnosis tool. By monitoring some of the process parameters of the screen included in this dynamic model, incipient malfunctions of the screen could be detected and failure could be prevented. The pressure screen model is part of a general strategy for diagnosing and controlling pressure screens.

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