Liquid Vapor Separator
In a liquid-vapor separation vessel, there are typically three stages of separation. The first stage, primary separation, uses an inlet diverter to cause the largest droplets to impinge by momentum and then drop by gravity. The next stage is gravity separation of smaller droplets as the gas flows through the vapor disengagement section of the separator. The final stage is mist elimination, where the smallest droplets are coalesced on an impingement device, such as a mist pad or vane pack, followed by gravity settling of the larger formed droplets. In vessels like flare knockout drums, we are primarily concerned with gravity separation since they typically have no coalescing internals, such as mist pads.
25 Feb 2020
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