The design of a comprehensive control system for air conveyance in a large polyethylene plant requires the integration of continuous and batch control. Continuous flow control for a wide range of process configurations must be integrated into the overall sequencing logic used to align, start-up, and shutdown the various flow paths. Conveying systems range from simple one blower, one route systems, to storage transfer systems incorporating 100 or more possible flow routes. In a complex conveying system the large number of route selections requires an operator interface which is self-explanatory and includes extensive validity checking of operator entries. Within one unit of a plant, an operator may have several conveying systems operating simultaneously; therefore, the control system also must function with minimal operator attention. A computer based control system, as described in this paper, provides the optimum system for achieving the desired operator interface and automated control performance.
Control systems design for air conveying systems
Entwicklung von Kontrollsystemen fuer Luftfoerdersysteme
1983
7 Seiten, 10 Bilder
Conference paper
English
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