Abstract: In July 2018, there were several abnormal fluctuations in the operation of No.2 solvent regeneration unit of SINOPEC Luoyang Company, resulting in tower flooding, which seriously affected the product quality of upstream unit and the SO2 emission of sulfur recovery unit. By analyzing the reasons, the optimization and adjustment were made by following measures: adding amine liquid purification device, cleaning all solvents by filtering, controlling the heavy component content fraction of liquefied gas and dry gas of FCC desulfurization device to lower than 2% and 3%, respectively, and reducing the pressure of amine-rich liquid flash tank to less than 0.05 MPa. Finally, the device run smoothly, the quality of lean liquid and catalytic desulfurization products were qualified, and the consumption of MDEA was reduced to meet the requirements of environmental protection.

Key words: solvent regeneration, Tower flooding, desulfurizer, amine purification