Application of the rough set data analysis for the development of the control structure of an FCC unit

  • Péter Mizsey
  • Andrzej Kraslawski

Abstract

The rough set data analysis (RSDA) is widely used for the determination of
non-linear relationships in many different areas. In this paper it is
applied to investigate the dependencies among the variables in fluid
catalytic cracking unit (FCC) consisting of reactor and regenerator parts.
The analysis has been performed to understand FFC behaviour and to develop
its control structure. About 140 operating points of an industrial FCC unit
are considered and analysed using the rough set methodology. The ROSETTA
toolkit is applied to discover the dependencies among the controlled and the
manipulated variables. It is determined that the temperature of the
regenerated catalyst has a significant influence on the product quality
(motor octane number) and it should be controlled. A new control loop is
designed and its controlled variable is the temperature in the regenerator
unit. To avoid afterburning in the regenerator part of the FCC unit, several
temperature measurements are recommended with the use of a special control
unit, a high selector (HS).The manipulated variable of the new control loop
is the feed flow of the bottom product of the main distillation column (BMC)
in the reactor part of the FCC unit.

Keywords

rough set; FCC unit; control structure development.
Published in Onlinefirst
01-12-2006
How to Cite
MIZSEY, Péter; KRASLAWSKI, Andrzej. Application of the rough set data analysis for the development of the control structure of an FCC unit. Periodica Polytechnica Chemical Engineering, [S.l.], v. 50, n. 2, p. 109-128, 2006. ISSN 1587-3765. Available at: <https://pp.bme.hu/ch/article/view/236>. Date accessed: 23 nov. 2017. doi: N/A.
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Articles