Calculation method for the U-bend on the condenser liquid outlet line?
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The gas inside the reactor enters the condenser, is cooled there, and then returns to the reactor. There is a U-shaped bend on the return pipe – how is the height of this U-shaped bend calculated?
Taking the position of backflow into the tower as a reference, the upper part is the pressure difference, and the lower part is the liquid seal. The upper part can return smoothly into the tower within the normal pressure range. The lower part also prevents the gas from taking a short circuit through the return pipe, depending on the pressure inside the tower.
Taking the position of backflow into the tower as a reference, the upper part is the pressure difference, and the lower part is the liquid seal. The upper part can return smoothly into the tower within the normal pressure range. The lower part also prevents the gas from taking a short circuit through the return pipe, depending on the pressure inside the tower.
It depends on whether the condenser is considered a buffer vessel; therefore, it is divided into two types. Without a buffering function, it is a liquid seal; with a buffering function, the height of the U-tube is determined based on the buffering time and the liquid level height.
The pressure drop across the condenser is low; whether in a normal-pressure or negative-pressure system, both sides are designed with zero pressure difference, serving merely as a liquid seal. I usually choose a height of 30–50 cm, depending on the layout of the equipment on site and the type of condenser used.
There’s also a bypass line; consider whether there’s enough space for the piping
The U-shaped bend serves as a liquid seal to cool the gas through the condenser; how is the height of this liquid seal calculated?
Could you draw a simple diagram? Thanks!
This U-shaped structure acts as a liquid seal to prevent the distillation vapor from taking a shortcut in the reaction vessel; its height is greater than the pressure drop across the tubes of the heat exchanger: