The pressure in the reflux tank is higher than the gas phase pressure, resulting in a high liquid level in the gas-liquid equilibrium tank of the atmospheric pressure tower.
Thread Content
We use a four-column methanol distillation system; except that the vapor pressure in the pre-column is higher than that in the reflux tank, the vapor pressures in the other three columns are all lower than that in the reflux tank. Now that winter has arrived and temperatures are low, the liquid level in the gas-liquid equilibrium tank of the three-tower reboiler keeps rising instead of falling; when the temperatures increase again, the liquid level drops on its own. What is the reason for this? How should it be handled?
If it occurs only when the temperature drops, try reducing the water flow rate in the tower top condenser
Isn’t the liquid level in the gas-liquid equilibrium tank controlled by itself?