The vapor phase rich liquid stream contains liquid hydrocarbons
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My unit features centralized regeneration of amine solution. I read in the documentation that this is done to prevent the gas separation unit from having liquid hydrocarbons in its rich liquid stream; but how do liquid hydrocarbons end up in that rich liquid stream? How does hydrogen sulfide, which removes liquid hydrocarbons from the lean liquid, turn into the rich liquid while carrying liquid hydrocarbons? I hope an expert can explain this. Thank you, many thanks
Poor liquid level control in the liquid hydrocarbon desulfurization tower, or large fluctuations in flow rate and pressure, can result in liquid hydrocarbons being present in the lean liquid.
The liquid level in the liquid hydrocarbon desulfurization tower is too low, or there are large fluctuations in the operating pressure of the flow tower, which results in the presence of liquid hydrocarbons
This post was last edited by jiutianyunhe on 2018-2-5 at 12:30. In a liquid hydrocarbon desulfurization tower, the liquid hydrocarbon enters from the bottom of the tower and flows upward, while the lean liquid enters from the top of the tower and flows downward; mass transfer occurs between them on the trays or packing. H2S in the liquid hydrocarbon is adsorbed by the lean liquid, resulting in a rich liquid, and the desulfurized liquid hydrocarbon is distilled out from the top of the tower. If there are excessive fluctuations in the feed to the desulfurization tower, an excess of lean liquid, or fluctuations in the pressure of the desulfurization tower (with a sudden increase), it can result in light hydrocarbons being carried in the rich liquid, similar to the phenomenon of flooding in a distillation tower. The feed temperature is too low ； Also, if the trays become clogged due to rust/mechanical impurities, it can also lead to the presence of hydrocarbons.
Control the temperature of the rich liquid and liquid hydrocarbons, ensuring that the temperature of the lean liquid entering the tower is 5 degrees higher than that of the liquid hydrocarbons.
The liquid level control in the liquid hydrocarbon desulfurization tower is not proper
The poster is referring to the rich liquid containing liquid hydrocarbons. It’s not what you said
I forgot to answer; the principle is the same. I’ll revise my reply next time
Sure it’s not operating at full tank capacity, right? Ladies and gentlemen… liquefied gas desulfurization extraction tower……