What are the symptoms when there is a gas blockage in the bottom reboiler?

I’m not sure which tower you’re referring to. Let me use the desorption tower in my factory as an example: the heating medium in the tube side is steam at 1.0 Mpa, while the material being processed in the shell side is deethanized gasoline; the temperature at the bottom of the tower is controlled at around 125°C. Phenomenon: 1. Even when the steam supply is increased, the temperature at the bottom of the tower does not rise; instead, it continues to drop, while the temperature of the gas stream returning back rises ； 2. The steam supply is intermittent, causing fluctuations in the liquid level of the condensate tank. Treatment: 1. Remove or significantly reduce the steam supply, raise the liquid level at the bottom of the tower to the height of the gas return port; once a decrease in temperature at the gas return port is observed, resume steam supply. Pay attention to checking for any leaks in the reboiler ； 2. Remove the steam, introduce it slowly, and open the vent at the tube side outlet to release gas; gradually add steam to increase the temperature at the bottom of the tower. When closing the vent, ensure that the path for the condensed water is unobstructed.

Does the liquid level at the bottom of the tower fluctuate during gas blockage?

For air resistance, consider internal leakage in the heat exchanger first! Once, our pipe broke! The amount of steam is simply gone

The gas blockage phenomenon in the reboiler occurs when the temperature at the bottom of the tower cannot be increased; even if more heat is supplied, no change takes place, and the liquid level at the bottom of the tower remains unchanged. Our plant encountered this issue during the heating process of the desorption tower when it was brought online, but by increasing the liquid level in the tower and thereby breaking the conditions for gas blockage, the temperature and the amount of gas being desorbed increased sharply!

Didn’t the steam leak into the oil and gas? ? ?

Why does raising the tower liquid level disrupt the gas holdup conditions?

I have two more questions. First, should this liquid level be raised to below the lower edge of the gas phase return port, or should it cover that lower edge, or go all the way up to the upper edge? Also, after the air resistance issue is resolved, does the liquid level need to be reduced to the normal level?