Refinery profitability is linked with its ability to process bad crudes and its complexity factor. Another key factor that can boost process margin is the feedstock management (FSM), a study of low value process streams and blending them in the feeds of other units to enhance refinery economics. Propylene yielding deep catalytic cracking (DCC) units tend to fire a part of unit feed to regenerator as torch oil which badly affects the catalyst activity and unit conversion apart from being a wastage of unit feed. Blending CCR rich streams like vacuum slop or Coker gas oil can solve the heat balance issues, improve unit material balance and enhance the unit conversion by 1-2 %. Another aspect of FSM is in maintaining tighter distillation cuts to avoid feeding lower cuts to units like DCC which can instead be processed well in units like DHT.
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