How high can nitrogen lift a liquid in a vertical pipe?
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I’m asking for help: if there is liquid in a vertical pipe and gas is injected into it, can the gas lift all the liquid to higher levels? To give a practical example, the oil transfer arm used for loading ships consists of three parts: the outer arm, the inner arm, and the column. The highest point is the junction where the outer arm and the inner arm meet. Assuming that the inner arm and the column are empty while the outer arm is filled with liquid, could injecting nitrogen at the bottom of the outer arm push the liquid back into the inner arm?
The pressure of nitrogen/liquid density/g is the lifting height.
How do you ensure that the nitrogen is below the liquid?
Should both the pressure and flow rate of nitrogen be taken into consideration? Otherwise, wouldn’t nitrogen be released in the form of bubbles?
Nitrogen is introduced from the bottom of the liquid; the nitrogen pipe has a diameter of 50, while the material pipe has a diameter of 300; it is assumed that the material pipe is filled to capacity
The pressure is sufficient; it should be increased slowly. If the flow rate of nitrogen gas is too high, bubbling will occur
Whether bubbling occurs needs to be simulated through modeling. If we assume that no bubbling will occur, then it’s certainly fine to drain the liquid. But why do we think that no bubbling will happen? I personally think it can’t be completely emptied. A 300 mm tube is too large; but no matter what the size, the nitrogen pressure and flow rate must be high – low rates are not acceptable