Aromatization absorption analysis tower
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The absorption and separation tower of the aromatization unit consists of 64 trays, and its absorption efficiency is not very good; there is a serious problem of oil carried in the dry gas. Please help solve this issue. Thank you:handshake
Check whether the load on the absorption column exceeds the design load; if not, the amount of absorbent used can be increased. Also, note that using stable gasoline as an absorbent contains C4 components, which affect the absorption efficiency. In addition, increase the pressure appropriately, and pay attention to the setting pressure of the safety valve at the top of the column
Does the initial boiling point of aromatic hydrocarbons affect the absorption efficiency? Doesn’t the principle of like dissolves like mean that an absorbent containing C4 will have a better absorption effect? Thank you
Refer to the temperature of the absorption stabilizer in the refinery’s fractionation unit. It seems there’s an issue with the temperature control of yours.
Oil carryover in the absorption/desorption tower disrupts its equilibrium. The dry gas volume at the top of the tower is too high, containing a lot of C3.
The absorbed dose is insufficient; it is calculated based on the feed amount
Oil in the dry gas indicates that the gas-liquid equilibrium has been disrupted; increasing the pressure, reducing the flow rate, and enlarging the tower diameter can help address this issue.
I agree with you; actually, the biggest problem is that the absorbent might be too small.
What is an appropriate amount of absorbent when the feed rate is 14 t/h? How was it calculated? Thank you, could you send it to my email address: 13616476621@139.com
Low dry gas volume and high external intake lead to high absorption temperatures, resulting in poor vaporization absorption by the absorbent; the absorbent may contain C4 compounds, or it could be operating under overload conditions.
It’s mainly a matter of coordinating temperature control and the dose of absorption; the problem has been basically resolved now. Thank you to all the experts