Does the effect of a reverse U-shaped bend valve vary depending on its installation location?
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As shown in the figure below, it is a plate distillation tower 10 meters high, with an inverted U-shaped bend about 2 meters at its bottom. What are the main functions of an inverted U-shaped bend? What is the difference in the function of installing control valves at positions A and B on the inverted U-shaped bend? ? ? Where is the best place to install it in order to better control the liquid level at the bottom of the tower?
The top height of this U-shaped bend should be determined based on the liquid level in your distillation tower; it should be at the same level as the liquid level. It is still necessary that the pressure inside the tower be equal to atmospheric pressure; in this case, the inverted U-shaped bend serves as a liquid-sealed fullness detection mechanism. The installation location of this valve should take into account the cleanliness of the material; for materials with high cleanliness that do not require frequent maintenance, Diagram B is preferable, while Diagram A is suitable in the opposite case. To facilitate the inspection and replacement of valves, after loading the discharge tower, it is possible to avoid discharging liquid in order to replace the valves; however, it is still necessary to follow the settings shown in Diagram B, depending on the specific requirements. Because too little information is provided for your tower section, for reference only.
Is the function of this inverted U-shaped bend to control the liquid level at the bottom of the tower by adjusting the valve opening, thereby maintaining the tower pressure? Are there any other functions?