改炼高含硫原油扩能改造中蒸馏装置的防腐蚀措施

介绍了金陵分公司常减压蒸馏装置改炼高硫原油扩能改造中采取的防腐蚀措施,主要有:①在易腐蚀部位选用耐腐蚀材料或复合材料;用螺杆压缩机回收三顶(常压塔顶、浅减压塔顶和深减压塔顶)气进行系统脱硫,彻底解决三顶气燃烧对炉管和热管的腐蚀以及对环境的污染问题.②施工中加强易腐蚀部位的焊缝检测和施工监督.③及时、合理调整"一脱三注"的化学药剂用量;高温部位增注高温缓蚀剂.④全员参与防腐蚀管理.⑤应用先进腐蚀在线监测系统和塔顶回流罐或产品罐pH值在线监测系统.该装置从2004年7月10日投产以来运行良好.

CORROSION PROTECTION IN REVAMPING CRUDE DISTILLATION UNIT TO PROCESS HIGH-SULFUR CRUDE

The 100,000 BPSD atmospheric and Vacuum distillation unit in SINOPEC Jinling Company has been revamped to process high-sulfur crude. In the expansion revamping, the following corrosion protection measures have been taken: 1. Selection of corrosion-resisting material or clad materials for the corrosive location; 2. Installation of screw compressor to recover overhead gas from atmospheric tower, vacuum tower and deep vacuum tower for desulfurization and elimination of corrosion of gas on heater tubes, heat pipes and environmental pollution when the gas is used as fuel; 3. Strengthened supervision of welding operation and construction for the section susceptible to corrosion; 4. Timely addition of proper dosage of associated chemicals; 5. Injection of high-temperature corrosion inhibitors in high-temperature service; 6. Effective comprehensive corrosion management; 7. Application of advanced online corrosion monitoring system and online pH monitoring system for overhead reflux drums or product drums. The unit has been running very smoothly ever since it came on stream on July 10, 2004.