. Vessel diameters are usually chosen to give a depth of
8 to 10 feet of oil and have a similar amount of headspace above the surface of the
oil. It is necessary to allow sufficient head space to avoid excessive entrainment
losses from the rolling and splashing of the oil caused by the injected steam. Stripping
steam is injected into the bottom of the vessel through a distributor. In addition to
the steam ejector system, means for heating, cooling, pumping, and filtering the oil
are required. The batch system controls include a device for indicating oil temperature
and a pressure gauge designed to indicate accurately low pressures within the
deodorizer