Method for automatic emptying and highly selective isolation of different fluids via the head space of a vessel in which the fluids are present in layered formation and apparatus for carrying out the method and for cleaning the vessel

摘要

Such a method and an apparatus for carrying it out ensure, inter alia, that the fluids to be emptied from the vessel are isolated with the highest possible yield and avoiding air suction. This is achieved inter alia by simultaneously extracting by suction two volume streams separate from each other from an upper fluid until the spatially leading volume stream, seen in the direction of movement of the suction apparatus, includes the fluid lying beneath and the physical property of the fluid altered by the change in fluid in the spatially leading volume stream is used on the one hand to interrupt the lowering of the suction device and on the other hand to interrupt the spatially leading volume stream with the occurrence of the event (Figure 3). <IMAGE>