German-style old vaporization furnace true flash vacuum extraction
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In German-style old vaporizers, the high flash point and the true flash point are connected; why is the negative pressure at the true flash point -50 kPa, while the pressure at high altitudes is 0.5 Mpa?
The pressure control is carried out in the gas phase, while the material for true flashing comes from the liquid phase of bottom flashing and is depressurized through a corner valve; the pressure control for true flashing is determined by a vacuum pump.
There should be a liquid level between the high flash point and the true flash point; in the absence of a liquid level and valve throttling, these values should be close to each other
Draw the flowchart a few more times and you’ll understand it all