Tags: hydrocarbon

Water Separation from Hydrocarbon

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If water separation is not a requirement, any of the vessel sizes meeting the surge volume and L/D requirements in Section 352 may be chosen. Otherwise, water separation must be checked. Using Equation 300-5 or 300-7 depending on the Reynolds number, compute the settling velocity for a 100-micron water droplet in hydrocarbon. Hydrocarbon residence time […]

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Separating hydrocarbon from water

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Separating hydrocarbon from water

Assume that a reflux drum operates at 100°F. The water leg should allow 100-micron oil droplets to “settle” upward. This will produce “good separation” of oil from water. If flow is laminar, we may substitute in Equation 300-5 and obtain the following equation (plotted in Figure 300-3) for allowable water velocity in the leg:

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