PRACTICAL CONTROL STRATEGY ELIMINATES FCCU COMPRESSOR SURGE PROBLEMS

01/12/1993
Mario Cesar M. M. Campos, Paulo Sergio B. Rodrigues Petroleo Brasileiro SA Rio de Janeiro The control system originally designed for the fluid catalytic cracking unit (FCCU) compressor at Petroleo Brasileiro SA's (Petrobras) Presidente Bernardes refinery in Sao Paulo, Brazil, was inadequate. The system required almost permanent flow recirculation to prevent surge. An improved antisurge control strategy was implemented in mid-1990. Since then, the unit has operated without the former surge problems. BACKGROUND The FCCU at the Presidente Bernardes refinery employs a two-section centrifugal wet-ga...
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