In order to broaden the raw material fraction of catalytic cracking unit,the raw material of a petrochemical 2.2 Mt/a catalytic cracking unit has been adjusted from atmospheric residual oil and hydrogenation tail oil to vacuum residual oil and hydrogenation tail oil since December 2023.It is considered that the carbon residue,heavy metal and viscosity in vacuum residue have adverse effects on the long period operation of catalytic cracking unit.In view of the above problems,this paper analyzes the changing trend of the mixed raw material index before and after mixing vacuum residue.The adverse effect of mixing vacuum residuum on long cycle operation of catalytic unit was reduced by process adjustment.
关键词
催化裂解/减压渣油/长周期运行
Key words
catalytic cracking/vacuum residue/long period operation
维普
万方数据