Stabilizer tower
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What does it mean that the pressure in the stabilizer should be higher than the saturated vapor pressure of the liquefied gas at its cooled temperature? And why needs it to be higher? ? {:3_62:}
If it drops below that level, won’t the liquefied gas vaporize?
At a certain temperature, the operating pressure must be greater than the saturated vapor pressure at that temperature in order to achieve liquefaction; therefore, it needs to be higher
If it is not high, liquefied gas will not flow from the top of the tower into the top buffer tank
Pressure must be greater than the equilibrium pressure in order to remain in a liquid state； If it is lower, the liquefied gas will partially vaporize; if it is too low, it will vaporize in large amounts or even completely, and eventually stabilize at the equilibrium pressure.
The saturated vapor pressure at the temperature after liquefied gas has been cooled is, in fact, the pressure in the reflux tank at the top of the stabilizer! ! ! In the pressure-controlled scheme of the stabilizer tower, liquefied gas enters the reflux tank from the top of the tower; it is this pressure difference between the top of the tower and the reflux tank that enables the cooled liquid liquefied gas to flow into the reflux tank from its bottom, driven by this pressure difference. Therefore, the pressure at the top of the stabilizer must be greater than the saturated vapor pressure of the liquefied gas after cooling! ! ! It seems that many people before me didn’t get to the point, or maybe my understanding is rather one-sided.