Reasons why reboiler vapor cannot enter the amine regeneration tower
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If steam cannot enter a regeneration tower, what do you think could be the cause?
1. Pressure buildup in the regeneration tower ； 2. The intake pipe is blocked by foreign objects ； 3. The intake pipe is blocked by the liquid level ； 4. The steam pressure is low.
The most common scenario is an increase in the backpressure of the condensate water.
Amine solution regeneration is achieved through the reboiler at the bottom of the tower. The main reason why steam cannot reach the reboiler is an obstruction in the drainage path for the condensed water; it has nothing to do with the regeneration pressure.
Trouble with the steam trap? Is the hydrophobic pipe too small?
Another possibility is that the reboiler is empty, meaning there is no heated lean liquid; as a result, the heat from the steam cannot be absorbed, preventing the steam from entering. You can try opening the filling valve of the reboiler.
The views expressed upstairs on this issue are truly unique and insightful; I support them
Scaling in the reboiler reduces the heat exchange efficiency, which may prevent the steam from cooling down, and it can also lead to the issues mentioned above.
It might also be related to stress, in my personal opinion. Of course, the pressure is not much different from the design, so it might have little impact. But theoretically, there should be a connection: excessive pressure and too high a temperature of the medium at the bottom of the tower prevent steam from exchanging heat.
“Another possibility is that the reboiler is empty, meaning there is no heated lean liquid; as a result, the heat from the steam cannot be absorbed, preventing the steam from entering. You can try opening the filling valve of the reboiler. “ I fully support your view! In our new unit, the reboiler cannot be fed with steam when the liquid level in the regeneration tower is around 45%; moreover, the temperature of the liquid drawn from the bottom of the tower is also about 50 degrees lower. It is suspected that this line is blocked. Currently, we are maintaining the liquid level at the bottom of the tower between 60% and 90%, allowing the amine solution to flow back through the liquid-phase return line of the reboiler. Try turning on the filling valve of the reboiler you mentioned. Where is the filling valve? I hope to get your help! Thank you!
Generally, there is a connecting valve in the inlet pipe of the siphon reboiler and in the outlet pipe for the product at the bottom of the tower; we refer to this valve as the reboiler filling valve. Sometimes, for reasons unknown, especially when the stripping tower is started and there is no liquid phase in the reboiler, this valve is opened to fill the reboiler with the liquid phase from the bottom of the tower; once the reboiler is heated, a circulation is established.