The double lift pipe in a 800 kt/ a catalytic cracking unit, including reaction – regeneration fractionation, absorption – stablization, waste heat boiler and gasoline mercaptan removal, was remoulded. 中国石油锦西石化公司采用石油大学与华东设计院共同开发的双提升管催化裂化技术,对80万t/a催化裂化装置反应$C再生、分馏、吸收稳定、余热锅炉、汽油脱硫醇等部分进行改造。