The orientation issue of the medium inside the tower
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I’m not quite clear regarding the flow of the medium inside a float valve tray column. Does the gaseous phase of the medium rise to the upper part of the column through the float valves, or does it also rise through the overflow channel and liquid drop channels to reach the upper part? I’m not sure, so please provide some guidance. Thank you
It is recommended to check your flowchart; there should be a schematic diagram. There should be an overflow weir on the tray to maintain the liquid level height on the tray. Some reflux streams are equipped with overflow pipes to return to the lower tray or the bottom of the tower. By setting the height of the junction opening below the liquid level to create a liquid seal, the rise of gas can be prevented; distillation can then take place only through the gas pores in the tray, enabling mass and heat transfer between the liquid and the gas. For reference.
Under normal operating conditions, gas flows through the floating valve while liquid flows through the overflow tube; if the gas flow is insufficient to push the floating valve open, leakage of liquid will occur as well. Gas may also rise from the downcomer; if the amount of gas is excessive, it can prevent the liquid from falling properly, leading to flooding of the tower