For high-temperature materials under high vacuum, which pump should be chosen?
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The liquid from the bottom of the tower is pumped into the falling-film reboiler; due to the high temperature and low vacuum level, cavitation is likely to occur very easily. In such situations, when it’s not possible to change the location of the pump or the piping, how can this problem be solved? Lower the material temperature? I’m a beginner in mechanics; I’d like to ask everyone for some advice.
So, should we first lower the temperature of the material?
Temperature, boiling point, and vacuum level of logistics. . . You don’t know anything? ? ? ?
It should be, but it also depends on your process requirements
It is generally advisable to maintain a certain level of liquid in the tank to prevent cavitation, by using a shielded pump with a cooling circulation system
That’s all it means – the boiling point under the current vacuum level
Choosing a dry vacuum pump will prevent cavitation.
You’re using a water ring pump, right? If a condenser is installed in front of the pump, along with a Danfoss claw-type dry vacuum pump, your problem can be easily resolved.
Increasing the static head is the best approach, followed by selecting a pump with a low NPSHr.