How to size liquid-vapor separators chemical engineering

Arnold, K. Length must be allotted for inlet devices, gas demisters, and coalescers. The procedure then to calculate the drag coefficient is to calculate the Archimedes number, Ar, as defined in Eq. Allowance must be made for:.

Calculate the terminal settling velocity of light liquid droplets. These are typically perpendicular plates, as shown in Fig.

Monnery, W. Lyons, W. Calculate the approximate vessel weight based on the thickness and surface area of shell and heads. Ed , Society of Petroleum Engineers, 1987.

Calculate the heavy liquid residence time: Use 0.

For screening purposes, the following approximations can be used, where d is the vessel diameter. Calculate the required mesh-pad area with Eq.

For liquid drops in gas phase. Vertical orientation advantages: Branan, C.

Separator sizing

Chemical Engineering December: A 24-in. Nozzles are generally sized by momentum or velocities. The liquid capacity of most separators is sized to provide enough retention time to allow gas bubbles to form and separate out.

A comparison of Tables 5 and 6 shows that the liquid capacity is the dominant parameter. If the liquid level is too high, the demister will not drain, and liquid siphoning can occur.

McGraw-Hill Book Co. Calculate the height for liquid retention time with Eq. If drop or bubble removal is being used for sizing, consult Table 1 for guidelines.

Considerations in separator sizes is important during design. Sizing Vertical Two-Phase Separat or 1. Calculate the height from NLL to the inlet nozzle centerline based on the surge height H S and the inlet nozzle size which can be calculated as: