Sulfur Daily Question, March 30------5 wealth for participation, 10 wealth for correct answers
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Short answer: What are the reasons for amine liquid surging in the regeneration tower?
1. Check if there are any issues with the amine solution: whether the concentration is appropriate, whether it is foaming, or if it is degrading, etc； 2. If there is no problem with the amine solution, then it is likely that the tray is blocked, resulting in high differential pressure.
When the regeneration tower is not overloaded, but a large pressure difference across the tower occurs along with signs of flooding: this is a typical case of amine solution foaming, which prevents the liquid from flowing smoothly down the downcomer; the liquid accumulates within the tube, leading to liquid flooding until the tower is overwhelmed. When it accumulates to a certain level, the gas breaks through the liquid layer, resulting in a surge. The reflux drum at the top of the tower rises rapidly, and the bottom of the tower also rises quickly due to the large amount of liquid flowing downward; flooding is eliminated, and the tower operates normally.
The porosity of the filler should have decreased; the flow channels are not capable of handling this load. There are discussions on this topic on the Regeneration Tower flooding forum: http://bbs.hcbbs.com/thread-1391324-1-1.html (Source: Haichuan Chemical Industry Forum)
1. The production load is too low, falling short of the minimum designed load. 2. The packing in the tower is clogged (or the tray plates are clogged), especially in units with coking facilities. 3. The flashing effect of the rich liquid is poor; there is too much light hydrocarbon. 4. The concentrations of hydrogen sulfide and sulfur dioxide are too high, and the amount of gas inside the tower is excessive. 5. The solvent is foaming (an appropriate amount of antifoam agent should be added). 6. The reflux at the top of the regeneration tower is too low. 7. Steam control is inadequate, or superheated steam is being used
1. The production load is too low, falling short of the minimum designed load. 2. The packing in the tower is clogged (or the tray plates are clogged), especially in units with coking facilities. 3. The flashing effect of the rich liquid is poor; there is too much light hydrocarbon. 4. The concentrations of hydrogen sulfide and sulfur dioxide are too high, and the amount of gas inside the tower is excessive. 5. The solvent is foaming (an appropriate amount of antifoam agent should be added). 6. The reflux at the top of the regeneration tower is too low. 7. Steam control is inadequate, or superheated steam is being used
When the regeneration tower is not overloaded, but a large pressure difference across the tower occurs along with signs of flooding: this is a typical case of amine solution foaming, which prevents the liquid from flowing smoothly down the downcomer; the liquid accumulates within the tube, leading to liquid flooding until the tower is overwhelmed. When it accumulates to a certain level, the gas breaks through the liquid layer, resulting in a surge. The reflux drum at the top of the tower rises rapidly, and the bottom of the tower also rises quickly due to the large amount of liquid flowing downward; flooding is eliminated, and the tower operates normally. It is best to contact the amine manufacturer to add an appropriate amount of defoamer or replenish some fresh amine.
What are the reasons for amine liquid surging in the regeneration tower? When the regeneration tower is not overloaded, but a large pressure difference across the tower occurs along with signs of flooding: this is a typical case of amine solution foaming, which prevents the liquid from flowing smoothly down the downcomer; the liquid accumulates within the tube, leading to liquid flooding until the tower is overwhelmed. When it accumulates to a certain level, the gas breaks through the liquid layer, resulting in a surge. The reflux drum at the top of the tower rises rapidly, and the bottom of the tower also rises quickly due to the large amount of liquid flowing downward; flooding is eliminated, and the tower operates normally. It is best to contact the amine manufacturer to add an appropriate amount of defoamer or replenish some fresh amine.
Answer: 1. The excessive heating steam volume in the reboiler of the regeneration tower results in an excessive gas phase. 2 The liquid level in the regeneration tower fluctuates greatly. 3 Pressure control failure. 4 Interruption of reflux at the top of the regeneration tower or failure of the reflux pump.
When the regeneration tower is not overloaded, but a large pressure difference across the tower occurs along with signs of flooding: this is a typical case of amine solution foaming, which prevents the liquid from flowing smoothly down the downcomer; the liquid accumulates within the tube, leading to liquid flooding until the tower is overwhelmed. When it accumulates to a certain level, the gas breaks through the liquid layer, resulting in a surge. The reflux drum at the top of the tower rises rapidly, and the bottom of the tower also rises quickly due to the large amount of liquid flowing downward; flooding is eliminated, and the tower operates normally. It is recommended to add an appropriate amount of defoamer or replenish some fresh amine solution.
There are two reasons for liquid flooding in a typical regeneration tower: first, the amine solution becomes contaminated, resulting in severe foaming of the mixture； Second, the packing is clogged or the tray design is unreasonable.