June 2014

Refining Developments

Targeted liquid injection improves shed deck performance

This case study shows how the installation of an unique piping and lance design achieved targeted liquid injection, quenched vapor hot zones and reduced resid entrainment into the heavy coker gasoil product.

Riley, C., Wicklow, C., Valero Benicia Refinery; Hanson, D., Brown Burns, J., Valero Energy Corp.

Targeted liquid injection from a secondary pumparound (PA) effectively compensated for a shed-deck vapor distribution problem in a fluidized-bed coker. This case study shows how the installation of an unique piping and lance design achieved targeted liquid injection, quenched vapor hot zones and reduced resid entrainment into the heavy coker gasoil (HKGO) product. THE REFINERY The Valero Benicia refinery, owned by Valero Refining Company—California, operates a 28,000-bpd fluidized-bed coker.a The coker-reactor-effluent vapor passes through a single cyclone discharging into a scrubber that contains several rows of multi-pass shed decks. The scrubber-bottom liquid is pumped both as a re

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