The ferric ions in VGO have been minimized after the measures were taken,thus,a safety and smooth running of the hydrocracking unit has been realized.

• 针对腐蚀问题，采取相应的工艺防腐和设备更换材质方法，以达到降低VGO中铁离子的目的，从而使加氢裂化装置安全平稳运行。