September 2017

Special Focus: Refining Technology Developments

FCC collector tray leaks impact column operation

In the collective experience of the authors, one of the most troublesome pieces of refinery fractionation equipment is the collector tray.

Hanson, D., Brown Burns, J., Teders, M., Valero Energy Corp.

In the collective experience of the authors, one of the most troublesome pieces of refinery fractionation equipment is the collector tray.1,2,3 Collector trays serve many different functions: liquid collection, liquid distribution to trays (possibly in a transition section), liquid redistribution between packed sections, preliminary vapor distribution, solids collection and even de-entrainment. Often, designers try to accommodate many of the functions in this list into a single tray design. Design complication often precedes tower failures. Collector trays are commonly used as liquid collection devices to provide positive material balance control in distillation columns. They are designed w

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