The phenomenon of vacuum formation in the bottom pump during normal production
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In normal production, the phenomena of vacuum formation in the bottom pump include (). A. Large fluctuations in the feed volume to the atmospheric pressure furnace. B. A sudden rise in the outlet temperature of the reduced pressure furnace. C. An increase in the liquid level in the atmospheric pressure column. D. An increase in the liquid level in the initial distillation column. The answers are ABC. I would appreciate it if someone could explain why A is correct; I don’t think A should be chosen
Due to large fluctuations, the likelihood of bubble formation is high, and it is easy for the bottom of the tower to become empty