Abstract: This paper studies the long-term ammonium salt crystallization and corrosion problems in the overhead circulation system of the No.1 coking unit at Sino-Korea (Wuhan) Petrochemical Co., Ltd., and proposes installing a samarium-cobalt ammonium salt processor after the overhead circulation reflux pump to treat the overhead circulating oil. The results show that this technology can effectively transfer ammonium salts from overhead oil to sewage, prevent ammonium chloride crystallization and deposition in the overhead system, reduce fractionator top corrosion, and extend the unit's stable operation cycle.

Key words: Samarium-Cobalt Ammonium Salt Treatment Technology, Coking Unit, Fractionator Top Circulation System, Desalination and Corrosion Protection, Industrial Application