Oil in the dry gas stream of the catalytic reabsorption tower
Thread Content
What are the reasons for severe oil contamination in the dry gas stream of the catalytic reabsorption tower? 1. The tray is fine and has been thoroughly cleaned. 2. The foam breaker at the top of the tower is in good condition and undamaged. 3. The amount of reabsorbent used is also not excessive. What other factors could possibly cause this issue? Please advise, experts
Are there large pressure fluctuations in the absorption system? Are the temperatures of the absorbent, supplementary absorbent, and regenerator, as well as the temperature of the absorption system, much higher than before?
I believe the presence of oil in the dry gas is caused by an excessive volume of gas along with mist entrainment. Consider the following points: 1. Is the catalyst activity too high? 2. Is the processing volume too large? 3. Has there been an increase in external hydrocarbons entering the compressor, resulting in a higher compressor speed? 4. Is the temperature of the rich gas high after cooling, leading to a larger volume of such gas entering the absorption unit? 5. Have there been changes in the amount of terminator used in the reaction and in the volume of dry gas fed into it? 6. Has the temperature at the top of the absorption tower increased? 7. Is the volume of gas released during desorption higher? 8. Have there been changes in the amount of absorbent used and in the amount of lean absorbent oil? 9. Is the volume of dry gas leaving the unit higher? 10. Has the pressure in the reabsorption tower decreased? That’s all for now. Focus on improving the absorption process by trying things like increasing the pressure in the reabsorption tower or lowering the absorption temperature, etc. Make adjustments one by one and conduct timely analyses; it’s possible to determine whether improvements are being made by checking the volume of dry gas, the opening degree of the control valves in the reabsorption tower, and the opening degree of the valve controlling the liquid level at the bottom of the tower
Both the quality of the reabsorbent and the amount of dry gas have an impact.
This post was last edited by fsshsyyc on 2019-7-30 at 16:05. Was it just serviced? Is it still a problem arising from normal production? It’s best to write down the relevant details and data so that everyone can help analyze them! Otherwise, there are too many influencing factors, making it difficult to judge! Generally speaking, if the oil contamination is severe, it is mostly due to issues with the equipment. Process fluctuations will only cause slight oil carryover.
Did you bring it before? Add a gas-liquid coalescer
The reabsorbent remains unchanged; it is still light diesel. The amount of dry gas has decreased by 2,000–3,000 cubic meters due to the presence of oil
Is it because the raw materials have become lighter, and is the temperature at the upper part of your absorption tower higher than before?