Improvement to a separation device inside a vessel for the separation of a mixture containing at least a gaseous and a liquid phase

摘要

A recycle unit (210) includes a passage for the mixture. A primary separator (280) follows the passage, producing fractions A (substantially liquid) and B (substantially gas). A pipe (70) high in the vessel releases fraction B. An outlet pipe (30) removes fraction A under gravity. The outlet pipe has separate recycle and extraction units (60, 190, 40) for fraction A. Expansion of the liquid phase in the vessel is controlled (130) to keep its level at distance 0.05D from the outlet, where D is the vessel diameter. In a variant design, the extraction system comprises a second pipe concentric with the first (30) with an upper opening close to the expansion level of the liquid phase and connected by its lower section to the extractor (50) for fraction A. The recycle unit is conical and in the center. The outlet pipe is connected to the recycle unit in the vessel. A secondary, inertial separator (310) is included. This separates fraction B and a gaseous phase removed by the pipe (70) and a liquid fraction extracted by the pipe (30). Equal numbers of primary and secondary separators are interconnected in the design, which is further detailed. A further tertiary separator may be included.