Why is the temperature inside the tower over 100 degrees and is the pressure negative?
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The temperature inside the tower is over 100 degrees – why is there a negative pressure?
Drawn later. I don’t know either which tower they’re talking about
There is a vacuum pump, so any level of negative pressure is possible
The extraction temperature, extraction volume, and reflux rate all affect the tower pressure, as do various operating variables of the entire tower.
Look at your vacuum system and the setting for the discharge volume at the top of the tower; negative pressure is maintained regardless of the temperature. Consider the saturated steam temperature at different pressures for the material in question
Temperature has nothing to do with whether you’re under negative pressure or not.
Since it is a distillation tower, there must be a temperature gradient; it’s impossible for the entire tower to have the same temperature； The method to create a temperature gradient is the heat source at the bottom of the tower and the reflux at the top of the tower ； Some distillation columns can generate a vacuum even in the absence of a vacuum pumping system, due to the vacuum effect resulting from the significant reduction in volume of the vapor phase material at the top of the column when it is cooled and undergoes a phase change.