March 2018

Fluid Flow and Rotating Equipment

Simulation model of a vacuum heater transfer line

The vacuum tower is a critical part of many crude distillation units, and the vacuum heater transfer line is a critical part of vacuum tower operation.

Williams, R. H., C&I Engineering

The vacuum tower is a critical part of many crude distillation units, and the vacuum heater transfer line is a critical part of vacuum tower operation. The vacuum tower’s vacuum heater, heater transfer line and flash zone operate in concert with one another, so they must be designed as an integrated whole rather than as individual pieces. In a grassroots design, it is important to minimize the distance between the vacuum charge heater and vacuum tower to shorten the length of the vacuum heater transfer line. However, in a revamp of an existing unit, this distance and the transfer line pipe routing are already in place, so the new design must deal with constraints imposed by the existing layo

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