Is operating the liquid level in the desorption tower beneficial for desorption?

It is mainly related to temperature, but a higher liquid level and longer residence time will increase the total amount of gas released.

Will raising the liquid level have a similar effect to that in a diesel stripping tower? A higher liquid level changes the residence time and vaporization space, thereby increasing the flash point. However, the diesel stripping tower operates at atmospheric pressure while the desorption tower operates at high pressure – can they produce the same effect? When the liquid level rises, the temperature at the bottom of the desorption tower definitely drops, and it is necessary to increase the heat removed from that area. For example, if the temperature at the bottom of the tower was 95 degrees before the liquid level increased, and it dropped after that, increasing the amount of heat removed helps to bring the temperature back up to 95 degrees. Although both temperatures are 95 degrees in this case, one corresponds to a higher liquid level and the other to a lower one – will the effects be the same?

In tower operations, what impact does the liquid level have on the operation? Does it increase the residence time? Inbound and outbound should be balanced; how could it increase?

When the liquid level is increased, the temperature drops, which is not favorable for separation; therefore, the temperature at the bottom of the tower also needs to be increased!

It is assumed that increasing the residence time can improve the resolution (restoring the temperature to its original value)； However, I think the effect should be the same, because as the liquid level at the bottom of the tower increases, the temperature at the bottom of the tower also decreases, which reduces the efficiency of separation. But in order to raise the temperature at the bottom of the tower, it is necessary to increase the liquid level, and in that case the efficiency of separation is actually the same as when the liquid level is not increased ； In other words, as the liquid level rises, the amount of heat absorbed by the temperature also increases, in a direct proportional relationship; therefore, the analysis results remain essentially unchanged ； Raising the liquid level can also have adverse effects: for example, as the liquid level increases and the temperature drops, heat removal becomes necessary, and an increased amount of heat removal will inevitably affect the distillation process as well as the operation of the stabilizer tower. Personal opinion

As the liquid level rises, in order to maintain good separation efficiency, it is necessary to increase the bottom temperature, which increases the heat load at the bottom of the tower; however, this does not necessarily lead to better separation results. I think the efficiency of the separation process is still related to the bottom temperature of the tower, operating pressure, feed temperature, and the operating conditions of the absorption tower.

The reboiler at the bottom of our column is of the thermosiphon type; by raising the liquid level at the bottom of the column, the increased liquid level leads to a longer residence time. Moreover, the increased potential energy of the liquid helps facilitate the siphonic circulation, which in turn provides a slight improvement in the desorption effect.

The liquid level is generally kept at around 50%; from an operational perspective alone, it doesn’t make much difference if the level rises or falls.

While ensuring the bottom temperature of the tower, it should facilitate analysis; however, it is not commonly used