How are the volume (height) and liquid level of the distillation column bottom determined?
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How are the volume (height) of the distillation column bottom, the normal liquid level, the maximum liquid level, and the minimum liquid level determined? (Tower diameter 900 mm, material flow rate from the tower bottom 0.2 m3/h)
The minimum liquid level in the tower bottom tank should ensure that the bottom pump can operate properly for 30 minutes, and it should also prevent cavitation in the bottom pump. As for the maximum liquid level, it depends on the distance from the anti-surge plate in the tower bottom tank. Prevent the liquid level from being too high and causing the anti-overflow plate to be damaged.
In my opinion, the bottom of the distillation column should be reasonably large. I’ve encountered situations where the bottom of a distillation column was too small; any slight change in operation would result either in too low a liquid level or in evaporation of the liquid. Therefore, this aspect needs to be carefully considered during design.
The flow rate of the effluent is too low, and the tower diameter is too large. The volume of the reactor bottom is determined using a 1m level gauge. Maximum liquid level. The lowest liquid level, I guess.
So if the required static head for the reboiler is 1 m, would it be reasonable to increase this value, for example by using a level gauge with a 2-m range and taking 1.2 as the normal liquid level?
It’s not necessary to raise the liquid level; the installation height of the reboiler can be lower.
However, in that case, the static head will be too high, which will lead to a decrease in the vaporization rate of the reboiler.
Raising the liquid level and lowering the reboiler – isn’t that the same effect? The key is to calculate accurately in advance. With a low gasification rate, the liquid level can be fine-tuned further.
Master, then how is the size of that tower reactor determined?