Help needed
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How to calculate the diameter of a negative-pressure pipeline and the distance from the conical hood to the mouth of a barrel with a diameter of 140? Are there any formulas I can use as a reference?
Is it correct to determine the target pressure? -0.098 MPa, which is only 2 kPa – almost a vacuum condition. Yet a fume hood is still used; since air mixes with the gases emitted by organic liquids, isn’t there a risk of reaching the explosive limit and causing danger?
-0.098 MPa is just a parameter for ease of calculation; in reality, the vacuum level is not that high. There’s no need to worry about whether the explosion limit will be reached, as the operating conditions do not allow the fuel to reach its ignition point, and static electricity can be dissipated, so it is relatively safe. What I really want to know is how to carry out the calculations necessary to ensure that the evaporated vapor can be collected