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Application of Compensation Control in FCC Main Fractionator
Author(s) -
Yang S. H.,
Wang X. Z.,
Mcgreavy C.,
Sen X. X.,
Mao F. Z.
Publication year - 1996
Publication title -
developments in chemical engineering and mineral processing
Language(s) - English
Resource type - Journals
eISSN - 1932-2143
pISSN - 0969-1855
DOI - 10.1002/apj.5500040105
Subject(s) - feed forward , fluid catalytic cracking , compensation (psychology) , refinery , oil refinery , petrochemical , engineering , signal (programming language) , control theory (sociology) , process engineering , petroleum engineering , control (management) , cracking , materials science , control engineering , computer science , waste management , psychology , artificial intelligence , psychoanalysis , composite material , programming language
A compensation control system is developed and applied to the main fractionator of a fluid catalytic cracking unit. A compensation model is used for the outlet temperature of light cycle oil (LCO) accounting for the top pressure change of the column. A corrected temperature is used as a indication of the pour point of LCO, and the top pressure of the column is used as a feedforward signal to maintain the pour point by means of a predictive feedforward control. The control strategy has proved successful in the FUJIAN refinery of the China Petrochemical Inc. which is used as an example of the system.