Can four distillation towers share one 50 kPa vacuum system? Is it still one tower and one vacuum pump?
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Can four distillation towers share one 50 kPa vacuum system? Is it still one tower and one vacuum pump?
A single vacuum system can be shared. All four towers need to be activated at the same time.
Is the pumping capacity of your vacuum pump sufficient, or is the same vacuum level required in all four towers?
So how do we control it? Currently, we have one vacuum pump shared by two towers; in actual production, the tower pressure fluctuates frequently, making it impossible to operate the distillation towers. How should it be handled?
The evaporation rate, pressure drop, resistance of the vacuum tubes, and condensation volume of each tower all affect the level of vacuum. It may be acceptable if a certain degree of variation in vacuum level is permitted, provided that the vacuum pump has a sufficient pumping capacity
The vapor at the top of the tower is pressure-regulated using a butterfly valve before entering the vacuum pump.
If one pump is shared, if one tower is unstable, then the others certainly won’t be stable either. What is the purpose of this as well?
The tower pressure must not fluctuate; the vacuum pump can be large enough. Is it possible to share a vacuum pump through other means?
What the moderator means is that a butterfly valve should be installed at the vapor phase at the top of each of the four towers as a self-regulating valve to adjust the pressure; when the pressure becomes too high, the regulating valve opens to allow air to be drawn in from outside； When the pressure is low, the control valve closes and no air is drawn in. Then, finally, an additional control valve is added at the vacuum pump. Is that what you mean? Also, have the moderators designed or operated such multi-vacuum towers?
If high control requirements are needed, it is best to have a separate vacuum system.