Help post: Heat source operation in falling film evaporators under non-full condensation conditions
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When the flash vapor from the upper stage is used as a heat source for the evaporator shown in the diagram, at the saturation temperature corresponding to the pressure in that stage, only a portion of the heat source steam condenses. I wonder where this remaining steam goes; according to the design manual, there is an outlet for non-condensable gases at the top of the evaporator. However, I’m wondering whether the steam doesn’t flow directly through this outlet as a shortcut
It’s all in foreign languages that I can’t understand. Try to explain it using domestic principles; I’m not sure if it can be used as a reference, just for informational purposes. The gas is condensed into a liquid; this phase change reduces the pressure buildup in that area. To compensate for this reduced pressure, it is necessary to continuously supply the gas needed to maintain the pressure in that area. Whether such gas can be introduced in this way is provided for reference. Regarding the removal of non-condensable gases, it is primarily based on the physical properties of the components: the liquids that can be condensed flow downward, while the non-condensable gases continue to rise upward; this too is a form of separation method. The counterfeit version is for reference only.