Delayed coking absorption stabilization
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In delayed coking absorption stabilization, 1: The top temperature of the solvent regeneration tower increases and the liquid level in the top reflux tank rises; why then does the top pressure decrease? 2. The temperature of the reboiler returning to the solvent regeneration tower remains stable, as does the feed rate. However, the temperature at the top of the tower keeps fluctuating. When this temperature drops, the pressure at the top increases, along with the pressure in the reflux tank at the top of the tower. At such times, reducing the amount of reflux at the top helps to raise the temperature there gradually, while the pressure at the top and the pressure in the reflux tank also decrease. However, after some time, when the top temperature and the level in the top reflux tank rose significantly, the flow rate was increased again to lower the temperature. It keeps happening over and over again. I want to stabilize the top temperature and pressure. May I ask how experienced technicians handle this situation? ? ? ?
You have the delayed coking absorption and stabilization units as well as solvent regeneration; isn’t solvent regeneration carried out in separate units these days? Regarding this issue, there is air-cooling at the top of the solvent regeneration tower; doesn’t your air cooler have variable frequency control? Frequency conversion control is the most suitable approach; for water cooling, simply using it directly is sufficient. There are automatic control valves for regulating the pressure at the top of the tower, and appropriate temperature controls are in place to prevent the temperature from rising too high, as this could cause the decomposition of ethanolamine. Generally, the temperature should be kept below 125 degrees.
It’s not separate here~ there’s just one regeneration tower. The hydrogen sulfide in the rich liquid is separated out; the acidic gas at the top of our tower is cooled with water, and then passes through the reflux tank at the top of the regeneration tower, where separation occurs – the liquid is sent back to the top of the tower as a cooling reflux stream. Acidic gases are desulfurized to use as raw material. What I want to ask is why is the top temperature low while the pressure is high? How to explain
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How long has the solvent regeneration operation been running? What is the current load? Consider the reasons for fouling of the trays or insufficient load, which can lead to dry plates or local flooding. This is just my personal opinion; please feel free to correct me