Understanding unit pressure balance key to cost-effective FCC revamps

Understanding how system-component pressure losses influence compressor capacity is essential for cost-effective revamps in FCC units.Depending on the specific limitations of a particular FCC unit, capacity increases of 12-40% have been achieved without modifications to major vessels or rotating equipment. This article presents three case studies in which a manipulated pressure balance has materially reduced revamp investment by eliminating or minimizing compressor changes. Click here to enlarge imagePressure drop from the FCC air blower discharge to wet-gas compressor suction has a large influence on the performance of both compressors (Fig. 1). Because paralleling or replacing these co...

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