High-pressure flash evaporation
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May I ask, what is the relationship between the effectiveness of high-pressure flashing and the liquid level in the flash tank?
The effectiveness of high-pressure flashing is related to the pressure and temperature during the flashing process. Generally, under Texaco’s technology, the pressure for primary flashing is around 9.5 kilograms, with a temperature of about 180 degrees; it seems that the liquid level has little impact on this. It can also be assumed that as the liquid level increases, the flashing pressure rises slightly.
I understand what the original poster means: generally, a larger flash space will result in a better flash effect, with more acidic gases being produced during the flash process. In that case, it’s sufficient to set the liquid level control at a relatively low value.
A lower liquid level in the flash tank certainly improves the flashing effect; this not only increases the flashing space but also helps to reduce the flashing pressure and temperature. But it can’t be too low, otherwise there’s a risk of air leakage.